阅读说明：本技术 增压器及增压器中的配管的连结方法 (Supercharger and method for connecting pipes in supercharger ) 是由 清家齐显 入江宗祐 岩波诚一 松井泰 于 2019-06-19 设计创作，主要内容包括：在增压器中,具备：壳体(11)；旋转轴(14),旋转自如地支承于壳体(11)的内部；压缩机叶轮(33),设置于旋转轴(14)中的轴向的一端部；冷却水供给配管(81)及冷却水排出配管(82),在端部(81a、83a)具有凸缘部(111、112)且与壳体(11)连结；及润滑油供给配管(61),在端部(61a)具有凸缘部(112)且与壳体(11)连结,冷却水供给配管(81)及冷却水排出配管(82)的端部(81a、82a)插入于壳体(11)的冷却水供给流路(73)及冷却水排出流路(74),润滑油供给配管(61)的端部(61a)插入于壳体(11)的第1供给流路(51),并且凸缘部(112)向插入方向按压凸缘部(111、113)并固定于壳体(11)。(A supercharger is provided with: a housing (11); a rotating shaft (14) rotatably supported inside the housing (11); a compressor impeller (33) provided at one axial end of the rotating shaft (14); a cooling water supply pipe (81) and a cooling water discharge pipe (82) having flange sections (111, 112) at end sections (81a, 83a) and connected to the housing (11); and a lubricating oil supply pipe (61) having a flange section (112) at an end section (61a) and connected to the housing (11), wherein the ends (81a, 82a) of the cooling water supply pipe (81) and the cooling water discharge pipe (82) are inserted into the cooling water supply passage (73) and the cooling water discharge passage (74) of the housing (11), the end section (61a) of the lubricating oil supply pipe (61) is inserted into the 1 st supply passage (51) of the housing (11), and the flange section (112) presses the flange sections (111, 113) in the insertion direction and is fixed to the housing (11).)

1. A supercharger is characterized by being provided with:

a housing;

a rotating shaft rotatably supported inside the housing;

a compressor impeller provided at one axial end of the rotating shaft;

a 1 st pipe having a 1 st mounting flange at an end thereof and coupled to the housing; and

a 2 nd pipe having a 2 nd mounting flange at an end thereof and coupled to the housing,

an end of the 1 st pipe is inserted into a 1 st mounting hole provided in the housing,

an end portion of the 2 nd pipe is inserted into a 2 nd mounting hole provided in the housing, and the 2 nd mounting flange presses the 1 st mounting flange in an insertion direction and is fixed to the housing.

2. The supercharger of claim 1,

the rotating shaft is rotatably supported by the housing via a bearing, and at least one of the 1 st mounting hole and the 2 nd mounting hole is a lubricant supply hole or a lubricant discharge hole communicating with the bearing.

3. The supercharger of claim 1,

the housing is provided with a refrigerant flow path around the rotary shaft, and at least one of the 1 st mounting hole and the 2 nd mounting hole is a refrigerant supply hole or a refrigerant discharge hole communicating with the refrigerant flow path.

4. The supercharger of claim 1,

the rotary shaft is rotatably supported by the housing via a bearing, one of the 1 st mounting hole and the 2 nd mounting hole is a lubricant supply hole or a lubricant discharge hole communicating with the bearing, the housing is provided with a refrigerant flow path around the rotary shaft, and the other of the 1 st mounting hole and the 2 nd mounting hole is a refrigerant supply hole or a refrigerant discharge hole communicating with the refrigerant flow path.

5. The supercharger of any one of claims 1-4,

the 1 st mounting flange and the 2 nd mounting flange overlap in a thickness direction of the 1 st mounting flange and the 2 nd mounting flange, and only the 2 nd mounting flange is fixed to the case.

6. The supercharger of claim 5,

a rotation prevention mechanism is provided to prevent rotation of the 1 st pipe with respect to the housing.

7. The supercharger of claim 6,

the rotation preventing mechanism is provided with a contact portion that contacts the 2 nd pipe to prevent rotation of the 1 st pipe, in the 1 st mounting flange.

8. The supercharger of claim 6,

the rotation preventing mechanism is provided with a contact portion that contacts the 2 nd mounting flange to prevent rotation of the 1 st pipe, in the 1 st pipe.

9. The supercharger of claim 6,

as the rotation stopping mechanism, a contact portion that contacts the housing to prevent rotation of the 1 st pipe is provided in the 1 st mounting flange.

10. The supercharger of any one of claims 1-4,

the 1 st mounting flange and the 2 nd mounting flange overlap in a thickness direction of the 1 st mounting flange and the 2 nd mounting flange, and both the 1 st mounting flange and the 2 nd mounting flange are fixed to the housing.

11. The supercharger of any one of claims 1-10,

the 1 st pipe and the 2 nd pipe are fixed to the casing in parallel.

12. The supercharger of any one of claims 1-11,

the 1 st mounting surface of the housing on which the 1 st mounting hole is formed and the 2 nd mounting surface of the housing on which the 2 nd mounting hole is formed are continuous planes.

13. The supercharger of any one of claims 1-11,

the 1 st mounting surface of the housing on which the 1 st mounting hole is formed and the 2 nd mounting surface of the housing on which the 2 nd mounting hole is formed are flat surfaces having a step, the 1 st mounting surface is in contact with the 1 st mounting flange, and the 2 nd mounting surface is in contact with the 2 nd mounting flange.

14. The supercharger of any one of claims 1-13,

a plurality of the 1 st pipes are provided, and a common 1 st mounting flange is provided at an end of the 1 st pipes.

15. The supercharger of any one of claims 1-14,

a plurality of the 2 nd pipes are provided, and the 2 nd mounting flange that is common to the plurality of the 2 nd pipes is provided at an end portion thereof.

16. The supercharger of any one of claims 1-4,

the pipe joint is provided with a 3 rd pipe having a 3 rd mounting flange at an end portion thereof and connected to the housing, the 1 st mounting flange and the 2 nd mounting flange are overlapped in a thickness direction of the 1 st mounting flange and the 2 nd mounting flange, the 2 nd mounting flange and the 3 rd mounting flange are overlapped in a thickness direction of the 2 nd mounting flange and the 3 rd mounting flange, the 2 nd mounting flange is fixed to the housing, the 1 st mounting flange and the 3 rd mounting flange are pressed in an insertion direction, and a rotation stopping mechanism is provided for stopping rotation of the 1 st pipe and the 3 rd pipe with respect to the housing.

17. The supercharger of any one of claims 1-16,

a turbine wheel is provided at the other end portion in the axial direction of the rotary shaft.

18. The supercharger of any one of claims 1-16,

a motor that drives the rotary shaft is provided in the housing.

19. A method for connecting pipes in a supercharger, the supercharger comprising:

a housing;

a rotating shaft rotatably supported inside the housing;

a compressor impeller provided at one axial end of the rotating shaft;

a 1 st pipe having a 1 st mounting flange at an end thereof and coupled to the housing; and

a 2 nd pipe having a 2 nd mounting flange at an end thereof and coupled to the housing,

the method for connecting pipes in a supercharger includes:

inserting an end of the 1 st pipe into a 1 st mounting hole provided in the housing;

inserting an end of the 2 nd pipe into a 2 nd mounting hole provided in the housing; and

and a step of pressing the 1 st mounting flange in an insertion direction of the 2 nd pipe by the 2 nd mounting flange to fix the 1 st mounting flange to the housing.

Technical Field

The present invention relates to a supercharger that increases the pressure of air taken in from an internal combustion engine, and a method of connecting pipes in the supercharger.

Background

For example, an exhaust gas turbocharger has a compressor, a turbine, and a housing. The rotating shaft is rotatably supported in the housing, and a compressor impeller is connected to one end portion in the axial direction and a turbine impeller is connected to the other end portion. Then, the exhaust gas is supplied into the housing, and the turbine impeller rotates, whereby the rotating shaft rotates and the compressor impeller rotates. The compressor wheel pressurizes air taken in from the outside to become compressed air, and supplies the compressed air to the internal combustion engine.

In such an exhaust gas turbocharger, the rotary shaft is rotatably supported by the housing via a bearing, and lubricating oil is supplied to the bearing. Therefore, the housing is provided with a lubricant supply flow path for supplying lubricant to the bearing from the outside, and a lubricant discharge flow path for discharging the lubricant supplied to the bearing to the outside. A lubricant supply pipe is connected to the lubricant supply flow path, and a lubricant discharge pipe is connected to the lubricant discharge flow path. Further, since the exhaust gas is supplied to the inside and the casing becomes high in temperature, and the lubricating oil may be deteriorated, the turbine is provided with a cooling water flow path for circulating cooling water in the casing. A cooling water supply pipe is connected to an inlet port of the cooling water channel, and a cooling water discharge pipe is connected to an outlet port. As such a supercharger, for example, a supercharger described in the following patent document is available.

Prior art documents

Patent document

Patent document 1: japanese laid-open patent publication No. 9-310620

Disclosure of Invention

Technical problem to be solved by the invention

The pipe for lubricating oil or the pipe for cooling water is connected to the housing by providing a flange at an end thereof and fixing the flange to the housing. In the above-described supercharger, four pipes are used for the lubricating oil or the cooling water. In recent years, there has been a demand for connecting a plurality of pipes together at as many as possible in order to save space around an internal combustion engine. In this case, it is necessary to secure a mounting surface for fixing flanges of a plurality of pipes to the outer surface of the housing, which causes a problem of an increase in cost such as an increase in size of the housing or an increase in processing work of the mounting surface.

The present invention has been made to solve the above problems, and an object thereof is to provide a supercharger and a method of connecting pipes in the supercharger, which can collectively connect a plurality of pipes to a housing and can suppress an increase in cost.

Means for solving the technical problem

In order to achieve the above object, a supercharger of the present invention is characterized in that: the disclosed device is provided with: a housing; a rotating shaft rotatably supported inside the housing; a compressor impeller provided at one axial end of the rotating shaft; a 1 st pipe having a 1 st mounting flange at an end thereof and coupled to the housing; and a 2 nd pipe having a 2 nd mounting flange at an end thereof and coupled to the housing, wherein the 1 st pipe has an end inserted into a 1 st mounting hole provided in the housing, the 2 nd pipe has an end inserted into a 2 nd mounting hole provided in the housing, and the 2 nd mounting flange presses the 1 st mounting flange in an insertion direction and is fixed to the housing.

Therefore, the end of the 1 st pipe is inserted into the 1 st mounting hole of the casing, and the end of the 2 nd pipe is inserted into the 2 nd mounting hole of the casing, whereby the 1 st pipe and the 2 nd pipe are coupled to the casing. At this time, the 2 nd mounting flange presses the 1 st mounting flange in the insertion direction and is fixed to the housing. That is, the 2 nd pipe is fixed to the housing via the 2 nd mounting flange, and the 1 st pipe is fixed to the housing via the 2 nd mounting flange of the 2 nd pipe fixed to the housing. Therefore, the plurality of pipes can be collectively connected to the housing, and the increase in cost can be suppressed by suppressing the increase in size of the housing, the occurrence of machining work on the mounting surface, and the like.

In the supercharger of the present invention, the rotary shaft is rotatably supported by the housing via a bearing, and at least one of the 1 st mounting hole and the 2 nd mounting hole is a lubricating oil supply hole or a lubricating oil discharge hole communicating with the bearing.

Therefore, the pipe for supplying or discharging the lubricating oil to or from the bearing that rotatably supports the rotating shaft can be connected to the housing in a gathered manner.

In the supercharger of the present invention, the housing is provided with a refrigerant flow path around the rotary shaft, and at least one of the 1 st mounting hole and the 2 nd mounting hole is a refrigerant supply hole or a refrigerant discharge hole communicating with the refrigerant flow path.

Therefore, the pipes for supplying or discharging the refrigerant to or from the refrigerant flow path for cooling the casing can be connected to the casing in a collective manner.

In the supercharger of the present invention, the rotary shaft is rotatably supported by the housing via a bearing, one of the 1 st mounting hole and the 2 nd mounting hole is a lubricant supply hole or a lubricant discharge hole communicating with the bearing, the housing is provided with a refrigerant flow path around the rotary shaft, and the other of the 1 st mounting hole and the 2 nd mounting hole is a refrigerant supply hole or a refrigerant discharge hole communicating with the refrigerant flow path.

Therefore, the pipe for supplying or discharging the lubricating oil to or from the bearing that rotatably supports the rotating shaft and the pipe for supplying or discharging the refrigerant to or from the refrigerant flow path that cools the casing can be connected to the casing in a collective manner.

In the supercharger of the present invention, the 1 st mounting flange and the 2 nd mounting flange are overlapped in a thickness direction of the 1 st mounting flange and the 2 nd mounting flange, and only the 2 nd mounting flange is fixed to the housing.

Therefore, by fixing only the 2 nd mounting flange to the housing, the 2 nd pipe can be coupled to the housing, and the 1 st pipe can be coupled to the housing by pressing the 1 st mounting flange with the 2 nd mounting flange, so that the coupling of the plurality of pipes to the housing can be simplified.

In the supercharger of the present invention, a rotation stop mechanism is provided to prevent rotation of the 1 st pipe with respect to the housing.

Therefore, the 1 st pipe is prevented from falling off by the 2 nd mounting flange of the 2 nd pipe, and the rotation is prevented by the rotation stopping mechanism, whereby the 1 st pipe can be firmly connected to the housing.

In the supercharger of the present invention, as the rotation preventing mechanism, a contact portion that contacts the 2 nd pipe to prevent rotation of the 1 st pipe is provided in the 1 st mounting flange.

Therefore, as the rotation stopping mechanism, the contact portion is provided on the 1 st mounting flange, and the contact portion of the 1 st mounting flange contacts the 2 nd pipe to stop the rotation of the 1 st pipe, so that the rotation stopping of the 1 st pipe can be easily performed without changing the structure of the 1 st pipe.

In the supercharger of the present invention, as the rotation stopping mechanism, a contact portion that contacts the 2 nd mounting flange to prevent rotation of the 1 st pipe is provided in the 1 st pipe.

Therefore, by providing the contact portion in the 1 st pipe as the rotation stopping mechanism, the contact portion of the 1 st pipe comes into contact with the 2 nd mounting flange to stop the rotation of the 1 st pipe, and the rotation stopping of the 1 st pipe can be easily performed without changing the structure of the 1 st mounting flange.

In the supercharger of the present invention, as the rotation preventing mechanism, a contact portion that contacts the housing to prevent rotation of the 1 st pipe is provided in the 1 st mounting flange.

Therefore, as the rotation stopping mechanism, the contact portion is provided on the 1 st mounting flange, and the contact portion of the 1 st mounting flange is brought into contact with the housing to stop the rotation of the 1 st pipe, so that the rotation stopping of the 1 st pipe can be easily performed without changing the structure of the 1 st pipe.

In the supercharger of the present invention, the 1 st mounting flange and the 2 nd mounting flange are overlapped in a thickness direction of the 1 st mounting flange and the 2 nd mounting flange, and both the 1 st mounting flange and the 2 nd mounting flange are fixed to the housing.

Therefore, by fixing the 1 st mounting flange and the 2 nd mounting flange to the housing while overlapping each other, it is possible to fix the two pipes via the two mounting flanges by one fixing member, and it is possible to simplify the coupling portion of the plurality of pipes.

In the supercharger of the present invention, the 1 st pipe and the 2 nd pipe are fixed to the housing in parallel.

Therefore, since the 1 st pipe and the 2 nd pipe are parallel to each other and the 1 st mounting hole and the 2 nd mounting hole are parallel to each other, the workability can be improved by simplifying the processing of the two mounting holes of the housing, and the assemblability of the two pipes to the two mounting holes can be improved.

In the supercharger of the present invention, the 1 st mounting surface of the housing on which the 1 st mounting hole is formed and the 2 nd mounting surface of the housing on which the 2 nd mounting hole is formed are continuous planes.

Therefore, by forming two mounting holes in one planar mounting surface, the mounting surface can be easily processed and workability can be improved.

In the supercharger of the present invention, a 1 st mounting surface of the housing on which the 1 st mounting hole is formed and a 2 nd mounting surface of the housing on which the 2 nd mounting hole is formed are flat surfaces having a step, the 1 st mounting surface is in contact with the 1 st mounting flange, and the 2 nd mounting surface is in contact with the 2 nd mounting flange.

Therefore, even if there is a step between the 1 st mounting surface and the 2 nd mounting surface, the 1 st mounting flange is brought into contact with the 1 st mounting surface and the 2 nd mounting flange is brought into contact with the 2 nd mounting surface, whereby two pipes can be connected to the housing, and the plurality of pipes can be collectively connected to the housing regardless of the shape of the housing.

In the supercharger of the present invention, a plurality of the 1 st pipes are provided, and the 1 st mounting flange that is common to the plurality of the 1 st pipes is provided at an end portion thereof.

Therefore, by providing a common 1 st mounting flange at the end of the 1 st pipes and fixing the 2 nd mounting flange to the housing, the 1 st pipes can be connected to the housing, and the structure can be simplified and workability can be improved.

In the supercharger of the present invention, a plurality of the 2 nd pipes are provided, and the 2 nd mounting flange common to the plurality of the 2 nd pipes is provided at an end portion thereof.

Therefore, by providing a common 2 nd mounting flange at the end portions of the plurality of 2 nd pipes and fixing only one 2 nd mounting flange to the housing, the plurality of 2 nd pipes can be coupled to the housing, and the structure can be simplified and workability can be improved.

In the supercharger of the present invention, a 3 rd pipe having a 3 rd mounting flange at an end portion thereof and coupled to the housing is provided, the 1 st mounting flange and the 2 nd mounting flange overlap in a thickness direction of the 1 st mounting flange and the 2 nd mounting flange, the 2 nd mounting flange and the 3 rd mounting flange overlap in a thickness direction of the 2 nd mounting flange and the 3 rd mounting flange, the 2 nd mounting flange is fixed to the housing, the 1 st mounting flange and the 3 rd mounting flange are pressed in an insertion direction, and a rotation prevention mechanism that prevents rotation of the 1 st pipe and the 3 rd pipe with respect to the housing is provided.

Therefore, three or more pipes can be connected to the housing in a collective manner, and an increase in cost can be suppressed by suppressing an increase in size of the housing, an occurrence of a machining work on the mounting surface, and the like.

In the supercharger of the present invention, a turbine wheel is provided at the other end portion in the axial direction of the rotary shaft.

Therefore, in the exhaust gas turbocharger, the plurality of pipes can be connected to the housing in a collective manner, and the increase in cost can be suppressed by suppressing the increase in size of the housing, the occurrence of machining work on the mounting surface, and the like.

In the supercharger of the present invention, a motor that drives the rotary shaft is provided in the housing.

Therefore, in the electric supercharger, the plurality of pipes can be connected to the housing in a collective manner, and the increase in cost can be suppressed by suppressing the increase in size of the housing, the occurrence of machining work on the mounting surface, and the like.

A method for connecting pipes in a turbocharger according to the present invention is characterized in that the turbocharger includes: a housing; a rotating shaft rotatably supported inside the housing; a compressor impeller provided at one axial end of the rotating shaft; a 1 st pipe having a 1 st mounting flange at an end thereof and coupled to the housing; and a 2 nd pipe having a 2 nd mounting flange at an end thereof and connected to the housing, the pipe connection method in the supercharger including: inserting an end of the 1 st pipe into a 1 st mounting hole provided in the housing; inserting an end of the 2 nd pipe into a 2 nd mounting hole provided in the housing; and a step of pressing the 1 st mounting flange in the insertion direction of the 2 nd pipe by the 2 nd mounting flange to fix the mounting flange to the housing.

Therefore, the plurality of pipes can be collectively connected to the housing, and the increase in cost can be suppressed by suppressing the increase in size of the housing, the occurrence of machining work on the mounting surface, and the like.

Effects of the invention

According to the supercharger and the method for connecting pipes in the supercharger of the present invention, a plurality of pipes can be connected to the housing in a collective manner, and an increase in cost can be suppressed.

Drawings

Fig. 1 is a sectional view showing an exhaust gas turbocharger according to embodiment 1.

Fig. 2 is a sectional view showing a lubrication system of the exhaust turbocharger.

Fig. 3 is a sectional view showing a cooling system of the exhaust turbocharger.

Fig. 4 is a perspective view showing a coupling portion of the pipe to the housing.

Fig. 5 is a sectional view showing a coupling portion of the pipe to the housing.

Fig. 6 is a perspective view of a coupling portion of the pipe according to embodiment 1 as viewed from above.

Fig. 7 is a perspective view of the coupling portion of the pipe as viewed from below.

Fig. 8 is a perspective view showing a connection portion of the pipe to the housing in the exhaust turbocharger according to embodiment 2.

Fig. 9 is a perspective view showing a coupling portion of the pipe in modification 1 of embodiment 2.

Fig. 10 is a perspective view showing a coupling portion of the pipe in modification 2 of embodiment 2.

Fig. 11 is a perspective view showing a coupling portion of piping in the exhaust turbocharger according to embodiment 3.

Fig. 12 is a perspective view showing a coupling portion of the pipe to the housing.

Fig. 13 is a perspective view showing a coupling portion of piping in the exhaust turbocharger according to embodiment 4.

Fig. 14 is a perspective view showing a coupling portion of the pipe to the housing.

Fig. 15 is a sectional view showing a fixing part coupling part of the pipe.

Fig. 16 is a sectional view showing the electric supercharger according to embodiment 5.

Fig. 17 is a sectional view showing a coupling portion of the pipe to the housing.

Detailed Description

Hereinafter, preferred embodiments of a supercharger and a method of connecting pipes in the supercharger according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiment, and when there are a plurality of embodiments, the present invention includes a configuration in which the embodiments are combined.

[ embodiment 1 ]

Fig. 1 is a sectional view showing an exhaust gas turbocharger of embodiment 1, fig. 2 is a sectional view showing a lubrication system of the exhaust gas turbocharger, and fig. 3 is a sectional view showing a cooling system of the exhaust gas turbocharger.

As shown in fig. 1, an exhaust gas turbocharger 10 as a supercharger of the present invention includes a housing 11, a turbine 12, a compressor 13, and a rotary shaft 14.

The housing 11 is formed to be hollow inside, and includes a turbine housing 21 forming a 1 st space portion S1 configured to accommodate the turbine 12, a compressor housing 22 forming a 2 nd space portion S2 configured to accommodate the compressor 13, and a bearing housing 23 forming a 3 rd space portion S3 configured to accommodate the rotary shaft 14. The 3 rd space portion S3 of the bearing housing 23 is located between the 1 st space portion S1 of the turbine housing 21 and the 2 nd space portion S2 of the compressor housing 22.

The rotary shaft 14 is disposed in a bearing housing 23, and the end portion on the turbine 12 side is rotatably supported by the bearing housing 23 through a journal bearing 24, and the end portion on the compressor 13 side is rotatably supported by the bearing housing 23 through a journal bearing 25 and a thrust bearing 26. A turbine wheel 31 of the turbine 12 is fixed to one end portion of the rotary shaft 14 in the axial direction. The turbine impeller 31 is accommodated in the 1 st space S1 of the turbine housing 21, and a plurality of turbine blades 32 in the axial flow direction are provided at a predetermined interval in the circumferential direction on the outer peripheral portion. The other end portion of the rotary shaft 14 in the axial direction is fixed with a compressor impeller 33 of the compressor 13. The compressor impeller 33 is accommodated in the 1 st space S1 of the compressor housing 22, and a plurality of blades 34 are provided at a circumferential portion at predetermined intervals in the circumferential direction.

The turbine housing 21 is provided with an inlet flow path 35 for exhaust gas and an outlet flow path 36 for exhaust gas with respect to the plurality of turbine blades 32. The inlet flow path 35 is provided along the circumferential direction of the rotary shaft 14, and the outlet flow path 36 is provided along the axial direction of the rotary shaft 14. The turbine housing 21 is provided with a turbine nozzle 37 between the inlet flow path 35 and the turbine blade 32. Therefore, the exhaust gas introduced from the inlet flow path 35 is subjected to static pressure expansion by the turbine nozzle 37 and then is guided to the plurality of turbine blades 32, whereby the turbine wheel 31 can be driven to rotate.

The compressor housing 22 is provided with an air inlet port 38 and a compressed air outlet port 39 with respect to the compressor wheel 33. The air inlet port 38 is provided in the axial direction of the rotary shaft 14, and the compressed air outlet port 39 is provided in the circumferential direction of the rotary shaft 14. The compressor housing 22 is provided with a diffuser 40 between the compressor impeller 33 and the compressed air discharge port 39. Therefore, the air taken in from the air inlet port 38 as the combustion gas is compressed by the plurality of blades 34 of the compressor impeller 33 that is driven to rotate, and is discharged as compressed air from the compressed air discharge port 39 through the diffuser 40.

The exhaust gas turbocharger 10 configured as described above drives the turbine 12 by exhaust gas discharged from an exhaust system of an internal combustion engine not shown, the rotation of the turbine 12 is transmitted to the rotary shaft 14 to drive the compressor 13, and the compressor 13 compresses air and supplies the air to an intake system of the internal combustion engine.

The exhaust turbocharger 10 is provided with an oil supply device 41 that supplies lubricating oil to the two journal bearings 24, 25 and one thrust bearing 26. As shown in fig. 1 and 2, the oil supply device 41 includes a lubricant supply passage 42 and a lubricant discharge passage 43 formed in the bearing housing 23. The lubricant oil supply passage 42 is constituted by a plurality of supply passages 51, 52, 53, 54, and 55. The lubricant oil discharge flow path 43 is constituted by a plurality of discharge flow paths 56, 57.

The 1 st supply flow path (lubricant supply hole) 51 is provided radially above the bearing housing 23. The 2 nd supply passage 52 is provided axially at an upper portion of the bearing housing 23, and a base end portion thereof communicates with the 1 st supply passage 51. The base end of the 3 rd supply passage 53 communicates with the 1 st supply passage 51 and is provided so as to face the journal bearing 24. The base end of the 4 th supply passage 54 communicates with the 1 st supply passage 51 and is provided toward the journal bearing 25. The base end portion of the 5 th supply passage 55 communicates with the 2 nd supply passage 52, and is provided so as to face the thrust bearing 26. The 1 st discharge flow path 56 is provided as a space around the rotary shaft 14 between the journal bearing 24 and the journal bearing 25. The 2 nd discharge flow path (lubricant discharge hole) 57 is provided in the lower portion of the bearing housing 23 in the radial direction.

One end of the lubricant oil supply pipe 61 is connected to an oil pan, not shown, and the other end is connected to the 1 st supply passage 51. One end of the lubricant oil discharge pipe 62 is connected to the 2 nd discharge flow path 57, and the other end is connected to the oil pan. The lubricating oil supply pipe 61 is provided with an oil pump and an oil strainer, not shown, at an intermediate portion thereof.

Therefore, the lubricating oil supplied from the lubricating oil supply pipe 61 to the 1 st supply passage 51 is guided to the 2 nd supply passage 52, the 3 rd supply passage 53, the 4 th supply passage 54, and the 5 th supply passage 55. The lubricating oil guided to the 3 rd supply passage 53 is supplied to the outer peripheral surface of the journal bearing 24, and the lubricating oil guided to the 4 th supply passage 54 is supplied to the outer peripheral surface of the journal bearing 25. The lubricating oil guided to the outer peripheral surfaces of the journal bearings 24, 25 is supplied between the inner peripheral surfaces of the journal bearings 24, 25 and the outer peripheral surface of the rotary shaft 14 through the plurality of through-holes. The lubricating oil guided from the 2 nd supply passage 52 to the 5 th supply passage 55 is supplied between the inner peripheral surface of the thrust bearing 26 and the outer peripheral surface of the rotary shaft 14. Then, the lubricating oil supplied to the journal bearings 24, 25 is discharged to the 1 st discharge flow path 56 and falls into the 3 rd space portion S3. The lubricating oil supplied to the thrust bearing 26 then drops into the 3 rd space S3. The lubricating oil dropped into the 3 rd space portion S3 is discharged from the 2 nd discharge flow path 57 to the lubricating oil discharge pipe 62.

As shown in fig. 1 and 3, the exhaust turbocharger 10 is provided with a cooling device 71 that circulates cooling water (refrigerant) inside the bearing housing 23. The cooling device 71 includes a cooling water annular flow passage (coolant flow passage) 72, a cooling water supply flow passage (coolant supply hole) 73, and a cooling water discharge flow passage (coolant discharge hole) 74 formed in the bearing housing 23.

The cooling water annular flow path 72 is provided on the turbine 12 side in the bearing housing 23. That is, the cooling water annular flow path 72 is provided radially outside the journal bearing 24 in the bearing housing 23 in the circumferential direction. The annular cooling water flow path 72 is a flow path along the circumferential direction, but is blocked by providing an end portion at the upper portion of the bearing housing 23. The cooling water supply passage 73 and the cooling water discharge passage 74 are provided radially above the bearing housing 23. The cooling water supply passage 73 and the cooling water discharge passage 74 are provided linearly in parallel with the 1 st supply passage 51 of the lubricant oil supply passage 42 in the oil supply device 41 in the circumferential direction of the bearing housing 23.

As shown in fig. 1 to 3, the bearing housing 23 has a mounting surface 101 formed on an upper outer peripheral surface thereof. The cooling water supply channel 73, the 1 st supply channel 51, and the cooling water discharge channel 74 are provided so as to open in a direction perpendicular to the mounting surface 101. The cooling water supply channel 73, the 1 st supply channel 51, and the cooling water discharge channel 74 are arranged in this order in a horizontal direction intersecting the axial direction of the rotary shaft 14. In this case, the 1 st supply channel 51 is provided in the radial direction of the rotation shaft 14 (in the radial direction from the center), but the cooling water supply channel 73 and the cooling water discharge channel 74 are provided not in the radial direction of the rotation shaft 14 but in the direction parallel to the 1 st supply channel 51. The order of arrangement of the flow paths 51, 73, and 74 is not limited to this embodiment.

The distal end of the cooling water supply passage 73 communicates with one end of the cooling water annular passage 72 via a connecting passage 75. The cooling water discharge flow path 74 communicates with the other end of the cooling water annular flow path 72 via a connecting flow path 76.

One end of the cooling water supply pipe 81 is connected to the discharge side of a cooling water pump, not shown, and the other end is connected to the cooling water supply passage 73. One end of the lubricant oil discharge pipe 82 is connected to the cooling water discharge flow path 74, and the other end is connected to the suction side of the cooling water pump.

The cooling water supplied from the cooling water supply pipe 81 to the cooling water supply passage 73 flows through the connection passage 75 to the cooling water annular passage 72. The cooling water flows along the cooling water annular flow path 72, thereby cooling the bearing housing 23 and indirectly suppressing the temperature rise of the lubricating oil. The cooling water flowing through the cooling water annular flow path 72 flows through the connection flow path 76 to the cooling water discharge flow path 74, and is discharged to the lubricant oil discharge pipe 82.

Here, in the exhaust turbocharger 10 according to embodiment 1, the detailed description will be given of the connection portions of the lubricant supply pipe 61, the cooling water supply pipe 81, and the lubricant discharge pipe 82 of the bearing housing 23. Fig. 4 is a perspective view showing a coupling portion of a pipe to a housing, fig. 5 is a cross-sectional view showing the coupling portion of the pipe to the housing, fig. 6 is a perspective view showing the coupling portion of the pipe in embodiment 1 from above, and fig. 7 is a perspective view showing the coupling portion of the pipe from below. Fig. 4 and 5 show pipes 61, 81, and 82 cut at the middle.

As shown in fig. 4 to 7, in the bearing housing 23, the turbine 12 is located on one side in the axial direction in the rotary shaft 14 (refer to fig. 1), and the compressor 13 is located on the other side. The bearing housing 23 has a mounting surface 101 formed at an upper portion of an outer peripheral surface thereof, and the mounting surface 101 is a flat surface having no step in a radial direction of the bearing housing 23. The 1 st supply flow path 51, the cooling water supply flow path 73, and the cooling water discharge flow path 74 constituting the lubricating oil supply flow path 42 are formed so as to open to the mounting surface 101. At this time. The 1 st supply channel 51, the cooling water supply channel 73, and the cooling water discharge channel 74 are orthogonal to the mounting surface 101 and parallel to each other. The cooling water supply channel 73, the 1 st supply channel 51, and the cooling water discharge channel 74 are arranged in this order in a horizontal direction intersecting the axial direction of the rotary shaft 14. That is, the 1 st supply passage 51 is located at the center of the bearing housing 23, and the cooling water supply passage 73 and the cooling water discharge passage 74 are located on both sides in the circumferential direction.

The 1 st supply passage 51 is connected to an end 61a of the lubricant supply pipe 61, the cooling water supply passage 73 is connected to an end 81a of the cooling water supply pipe 81, and the cooling water discharge passage 74 is connected to an end 92a of the cooling water discharge pipe 82. Here, the cooling water supply pipe 81 and the cooling water discharge pipe 82 correspond to the 1 st pipe of the present invention, and the lubricating oil supply pipe 61 corresponds to the 2 nd pipe of the present invention. The cooling water supply pipe 81 corresponds to the 3 rd pipe of the present invention.

In embodiment 1, a flange portion 111 as a 1 st mounting flange is fixed to an end portion 82a of the cooling water discharge pipe (1 st pipe) 82 connected to the bearing housing 23. The flange portion 111 is fixed to a position spaced apart from the distal end of the cooling water discharge pipe 82 by an insertion length. A flange portion 112 serving as a 2 nd mounting flange is fixed to the lubricating oil supply pipe (2 nd pipe) 61 at an end portion 61a connected to the bearing housing 23. The flange portion 112 is fixed to a position spaced apart from the distal end of the cooling water discharge pipe 82 by a length obtained by adding the insertion length to the thickness of the flange portion 111. Flange portions 113 as a 1 st mounting flange and a 3 rd mounting flange are fixed to the cooling water supply pipe (1 st pipe and a 3 rd pipe) 81 at an end portion 81a connected to the bearing housing 23. Flange portion 113 is fixed to a position spaced apart from the distal end of cooling water supply pipe 81 by an insertion length.

The flange portion 111 has an elliptical shape, and the cooling water discharge pipe 82 is fixedly inserted into a through hole 111a formed on one end side, and a contact portion 111b serving as a rotation stop mechanism is formed on the other end side. The contact portion 111b is a concave portion having a curved shape along the outer peripheral surface of the lubricant oil supply pipe 61, and prevents rotation of the cooling water discharge pipe 82 with respect to the bearing housing 23. The flange portion 112 has an elliptical shape, and the lubricating oil supply pipe 61 is fixedly inserted into a through hole 112a formed in one end portion side, and a mounting hole 112b is formed in the other end portion side. The flange portion 113 has an elliptical shape, and a cooling water supply pipe 81 is fixedly inserted into a through hole 113a formed on one end side, and a contact portion 113b serving as a rotation stop mechanism is formed on the other end side. The contact portion 113b is a concave portion having a curved shape along the outer peripheral surface of the lubricant oil supply pipe 61, and prevents rotation of the cooling water supply pipe 81 with respect to the bearing housing 23.

An end 82a of the cooling water discharge pipe 82 is inserted into the cooling water discharge passage 74 provided in the bearing housing 23. At this time, an annular seal member 102 is inserted between the outer peripheral surface of the cooling water discharge pipe 82 and the inner peripheral surface of the cooling water discharge flow passage 74, and the lower surface of the flange portion 111 is closely attached to the mounting surface 101 of the bearing housing 23 without a gap. An end 81a of the cooling water supply pipe 81 is inserted into the cooling water supply passage 73 provided in the bearing housing 23. At this time, an annular seal member 103 is inserted between the outer peripheral surface of the cooling water supply pipe 81 and the inner peripheral surface of the cooling water supply passage 73, and the lower surface of the flange portion 113 is closely attached to the mounting surface 101 of the bearing housing 23 without a gap. An end 61a of the lubricant supply pipe 61 is inserted into the 1 st supply passage 51 provided in the bearing housing 23. At this time, an annular seal member 104 is inserted between the outer peripheral surface of the lubricant oil supply pipe 61 and the inner peripheral surface of the 1 st supply passage 51, and the lower surface of the flange portion 112 on the one end side is closely attached to the upper surface of the flange portion 113 of the cooling water supply pipe 81 without a gap, and the lower surface of the other end side is closely attached to the upper surface of the cooling water discharge pipe 82 without a gap.

In the bearing housing 23, a screw hole 105 is formed in a fixing surface 101a standing adjacent to the mounting surface 101. The flange portion 111 is adjusted in circumferential position so that the contact portion 111b contacts the outer circumferential surface of the lubricant supply pipe 61, and the flange portion 113 is adjusted in circumferential position so that the contact portion 113b contacts the outer circumferential surface of the lubricant supply pipe 61. At this time, the lower surface of the flange portion 112 is closely attached to the upper surfaces of the flange portions 111 and 113 of the cooling water supply pipe 81 and the cooling water discharge pipe 82 without a gap. The fastening bolt 114 is inserted through the mounting hole 112b of the flange portion 112 and screwed into the screw hole 105.

Therefore, the flange portion 112 is fixed to the fixing surface 101a by the fastening bolt 114, whereby the lubricant supply pipe 61 is coupled to the bearing housing 23. The flange portions 111 and 113 overlap with the lower portion of the flange portion 112 of the lubricating oil supply pipe 61, and thereby the cooling water supply pipe 81 and the cooling water discharge pipe 82 are pressed from the insertion direction into the pipes 81 and 82. Contact portions 111b and 113b of the flange portions 111 and 113 contact the outer peripheral surface of the lubricating oil supply pipe 61, and prevent the cooling water supply pipe 81 and the cooling water discharge pipe 82 from rotating. Therefore, the flange portions 111 and 113 are fixed to the flange portion 112 of the lubricating oil supply pipe 61, and the cooling water supply pipe 81 and the cooling water discharge pipe 82 are thereby connected to the bearing housing 23.

As described above, the supercharger according to embodiment 1 includes: housing 11 (bearing housing 23): a rotating shaft 14 rotatably supported inside the housing 11; a compressor impeller 33 (compressor 13) provided at one axial end of the rotary shaft 14; a cooling water supply pipe 81 and a cooling water discharge pipe 82 having flange portions 111 and 112 at end portions 81a and 83a and connected to the case 11; and a lubricant supply pipe 61 having a flange portion 112 at an end portion 61a and connected to the housing 11, wherein ends 81a and 82a of the cooling water supply pipe 81 and the cooling water discharge pipe 82 are inserted into the cooling water supply passage 73 and the cooling water discharge passage 74 of the housing 11, wherein the end portion 61a of the lubricant supply pipe 61 is inserted into the 1 st supply passage 51 of the housing 11, and wherein the flange portion 112 presses the flange portions 111 and 113 in the insertion direction and is fixed to the housing 11.

Therefore, the lubricant oil supply pipe 61 is fixed to the case 11 via the flange portion 112, the flange portion 113 is pressed by the flange portion 112 of the lubricant oil supply pipe 61 fixed to the case 11 to fix the cooling water supply pipe 81, and the flange portion 111 is pressed by the flange portion 112 of the lubricant oil supply pipe 61 fixed to the case 11 to fix the cooling water discharge pipe 82. Therefore, fastening bolts or the like for fixing the flange portions 111 and 113 of the cooling water supply pipe 81 and the cooling water discharge pipe 82 to the housing 11 can be eliminated. As a result, the plurality of pipes 61, 81, and 82 can be collectively connected to the housing 11, and an increase in cost can be suppressed by suppressing an increase in size of the housing 11, an occurrence of a machining operation of the mounting surface 101, and the like.

In the supercharger according to embodiment 1, the rotary shaft 14 is rotatably supported by the housing 11 via the bearings 24, 25, and 26, the lubricating oil supply passage 42 and the lubricating oil discharge passage 43 communicating with the bearings 24, 25, and 26 are provided, the housing 11 is provided with the cooling water circulation passage 72 around the rotary shaft 14, the cooling water supply passage 73 and the cooling water discharge passage 74 communicating with the cooling water circulation passage 72 are provided, and the lubricating oil supply pipe 61 connected to the 1 st supply passage 51 of the lubricating oil supply passage 42, and the cooling water supply pipe 81 and the cooling water discharge pipe 82 connected to the cooling water supply passage 73 and the cooling water discharge passage 74 are collected at one location of the housing 11. Therefore, it is possible to suppress an increase in cost by suppressing an increase in size of the housing 11, an occurrence of a machining work of the mounting surface 101, and the like.

In the supercharger according to embodiment 1, the flange portion 112 of the lubricating oil supply pipe 61, the flange portions 111 and 113 of the cooling water supply pipe 81 and the cooling water discharge pipe 82 are overlapped in the thickness direction thereof, and only the upper flange portion 112 is fixed to the housing 11. Therefore, by fixing only the flange portion 112 to the housing 11, the lubricating oil supply pipe 61 can be connected to the housing 11, and the flange portion 112 can press the flange portions 111 and 113 to connect the cooling water supply pipe 81 and the cooling water discharge pipe 82 to the housing 11, so that the connection of the plurality of pipes 61, 81, and 82 to the housing 11 can be simplified.

In the supercharger according to embodiment 1, the contact portions 111b and 113b are provided as a rotation stopping mechanism for stopping rotation of the cooling water supply pipe 81 with respect to the housing 11. Therefore, the cooling water supply pipe 81 and the cooling water discharge pipe 82 are prevented from coming off by the flange portion 112 of the lubricating oil supply pipe 61, and rotation is prevented by the rotation prevention mechanism, whereby the cooling water supply pipe 81 and the cooling water discharge pipe 82 can be firmly connected to the housing 11.

In the supercharger according to embodiment 1, as the detent mechanism, contact portions 111b and 113b that contact the lubricating oil supply pipe 61 are provided in the flange portions 111 and 113 of the cooling water supply pipe 81 and the cooling water discharge pipe 82. Therefore, the rotation of the cooling water supply pipe 81 and the cooling water discharge pipe 82 can be easily stopped without changing the structure of the cooling water supply pipe 81.

In embodiment 1, the flange portion 112 of the lubricating oil supply pipe 61 is fixed to the bearing housing 23 by the fastening bolt 114, and the flange portion 112 presses the flange portions 111 and 113 of the cooling water supply pipe 81 and the cooling water discharge pipe 82, but the configuration is not limited to this. For example, the flange portion 111 of the cooling water discharge pipe 82 and the flange portion 112 of the lubricating oil supply pipe 61 may be overlapped in the thickness direction thereof, and both the flange portions 111 and 112 may be fixed to the case 11 by separate fastening bolts.

In the supercharger according to embodiment 1, the lubricating oil supply pipe 61, the cooling water supply pipe 81, and the cooling water discharge pipe 82 are fixed in parallel to the housing 11. Therefore, since the 1 st supply passage 51, the cooling water supply passage 73, and the cooling water discharge passage 74 are parallel to each other, the processing of the passages 51, 73, and 74 of the housing 11 can be simplified to improve the workability, and the assembling property of the pipes 61, 81, and 82 to the passages 51, 73, and 74 can be improved.

In the supercharger according to embodiment 1, the mounting surface 101 on which the 1 st supply channel 51, the cooling water supply channel 73, and the cooling water discharge channel 74 are formed is a continuous flat surface with no step. Therefore, the mounting surface 101 can be easily machined to improve workability.

In the supercharger according to embodiment 1, the flange portion 111 of the cooling water discharge pipe 82 and the flange portion 112 of the lubricating oil supply pipe 61 are overlapped in the thickness direction, the flange portion 113 of the cooling water supply pipe 81 and the flange portion 112 of the lubricating oil supply pipe 61 are overlapped in the thickness direction, the fastening bolt 114 is inserted through the flange portion 112 and screwed into the housing 11, thereby fixing the lubricating oil supply pipe 61 to the housing 11, the flange portion 112 of the lubricating oil supply pipe 61 presses the flange portions 111, 113 of the cooling water supply pipe 81 and the cooling water discharge pipe 82 in the insertion direction, and the contact portions 111b, 113b are provided as a rotation stopping mechanism for stopping the rotation of the cooling water supply pipe 81 and the cooling water discharge pipe 82 with respect to the housing 11. Therefore, three or more pipes 61, 81, and 82 can be collectively connected to the housing 11, and an increase in cost can be suppressed by suppressing an increase in size of the housing 11, an occurrence of a machining work on the mounting surface 101, and the like.

The turbocharger according to embodiment 1 is provided as an exhaust gas turbocharger 10: a turbine wheel 31 (turbine 12) is provided at one axial end of the rotating shaft 14, and a compressor wheel 33 (compressor 13) is provided at the other axial end. Therefore, in the exhaust turbocharger 10, the plurality of pipes 61, 81, 82 can be connected to the housing 11 collectively, and an increase in cost can be suppressed by suppressing an increase in the size of the housing 11, an occurrence of a machining work of the mounting surface, and the like.

A method for connecting pipes in a supercharger according to embodiment 1 includes: inserting the ends 81a and 82a of the cooling water supply pipe 81 and the cooling water discharge pipe 82 into the cooling water supply passage 73 and the cooling water discharge passage 74 of the casing 11; inserting an end 61a of the lubricant supply pipe 61 into the 1 st supply passage 51 of the housing 11; and a step of pressing the flange parts 111, 113 in the insertion direction by the flange part 112 and fixing the same to the housing 11.

Therefore, the plurality of pipes 61, 81, and 82 can be collectively connected to the housing 11, and an increase in cost can be suppressed by suppressing an increase in size of the housing 11, an occurrence of a machining work of the mounting surface 101, and the like.

[ 2 nd embodiment ]

Fig. 8 is a perspective view showing a connection portion of the pipe to the housing in the exhaust turbocharger according to embodiment 2. The basic configuration of the present embodiment is the same as that of embodiment 1 described above, and the description is given with reference to fig. 1 to 3, and components having the same functions as those of embodiment 1 are given the same reference numerals, and detailed description thereof is omitted.

In embodiment 2, as shown in fig. 1 to 3, the bearing housing 23 of the exhaust turbocharger 10 has mounting surfaces 106 and 107 formed at an upper portion of an outer peripheral surface thereof, and the mounting surfaces 106 and 107 are flat surfaces having a step 108. That is, the 2 nd mounting surface 107 is a plane distant from the axial center side of the rotation shaft 14 with respect to the 1 st mounting surface 106, and a step 108 is provided between the 1 st mounting surface 106 and the 2 nd mounting surface 107. The cooling water supply channel 73 is formed in the 1 st mounting surface 106, and the 1 st supply channel 51 and the cooling water discharge channel 74 constituting the lubricant oil supply channel 42 are formed in the 2 nd mounting surface 107. At this time, the 1 st supply channel 51, the cooling water supply channel 73, and the cooling water discharge channel 74 are orthogonal to the mounting surfaces 106 and 107. The cooling water supply channel 73, the 1 st supply channel 51, and the cooling water discharge channel 74 are arranged in this order in a horizontal direction intersecting the axial direction of the rotary shaft 14. The lubricating oil supply pipe 61 is connected to the 1 st supply passage 51, the cooling water supply pipe 81 is connected to the cooling water supply passage 73, and the cooling water discharge passage 74 is connected to the cooling water discharge pipe 82.

As shown in fig. 8, a flange portion 131 as a 1 st mounting flange is fixed to an end portion 81a connected to the bearing housing 23 of the cooling water supply pipe 81 as a 1 st pipe. Flange portions 132 serving as the 2 nd mounting flange are fixed to end portions 82a and 61a connected to the bearing housing 23 of the cooling water discharge pipe 82 serving as the 2 nd pipe and the lubricating oil supply pipe 61 serving as the 2 nd pipe. That is, in embodiment 2, a plurality of 2 nd pipes (two pipes in the present embodiment) are provided, and a flange portion 132 serving as a common 2 nd mounting flange is fixed to end portions 82a, 61a of the cooling water discharge pipe 82 and the lubricating oil supply pipe 61 serving as the 2 nd pipes.

The flange 131 has a rectangular shape, and the cooling water supply pipe 81 is fixedly inserted into the through hole 131a, and a contact portion 131b as a rotation stopping mechanism is formed on the outer peripheral portion. The contact portion 131b prevents the cooling water supply pipe 81 from rotating with respect to the bearing housing 23, and has a planar shape along the regulating surface 109 of the bearing housing 23. The restricting surface 109 is a surface orthogonal to the rotary shaft 14 (see fig. 1) in the axial direction. The flange portion 132 has an elliptical shape, and the cooling water discharge pipe 82 and the lubricating oil supply pipe 61 are fixedly inserted into through holes 132a and 132b formed in the center portion and the one end portion side, and the mounting hole 132c is formed in the other end portion side.

The end 81a of the cooling water supply pipe 81 is inserted into the cooling water supply passage 73 (see fig. 3) provided in the bearing housing 23, and the lower surface of the flange portion 131 is closely attached to the 1 st mounting surface 106 of the bearing housing 23 without a gap. An end 82a of the cooling water discharge pipe 82 is inserted into the cooling water discharge passage 74 (see fig. 3) provided in the bearing housing 23, and an end 61a of the lubricating oil supply pipe 61 is inserted into the 1 st supply passage 51 (see fig. 2) provided in the bearing housing 23. At this time, the lower surface of the flange portion 132 on the one end side is closely attached to the upper surface of the flange portion 131 of the cooling water supply pipe 81 without a gap, and the other lower surface is closely attached to the 2 nd mounting surface 107 of the bearing housing 23 without a gap.

The bearing housing 23 has a screw hole 105 formed at a predetermined position. The circumferential position of the mounting hole 132c of the flange portion 132 is adjusted so as to overlap the screw hole 105, and the fastening bolt 114 is inserted through the mounting hole 132c of the flange portion 132 and screwed into the screw hole 105. The contact portion 131b of the flange portion 131 contacts the regulating surface 109 of the bearing housing 23.

Therefore, the common flange portion 132 is fixed to the 2 nd mounting surface 107 by the fastening bolt 114, whereby the cooling water discharge pipe 82 and the lubricant oil supply pipe 61 are coupled to the bearing housing 23. The flange portion 131 overlaps the lower portion of the flange portion 132, and thereby presses the cooling water supply pipe 81 in the insertion direction. The contact portion 131b of the flange portion 131 contacts the regulating surface 109 of the bearing housing 23 to prevent the cooling water supply pipe 81 from rotating. Therefore, the flange portion 131 is fixed to the 1 st mounting surface 106 via the bearing housing 23 and the flange portion 132, and the cooling water supply pipe 81 is coupled to the bearing housing 23.

The rotation stopping mechanism of the cooling water supply pipe 81 is not limited to the above. Fig. 9 is a perspective view showing a coupling portion of a pipe in modification 1 of embodiment 2, and fig. 10 is a perspective view showing a coupling portion of a pipe in modification 2 of embodiment 2.

In modification 1 of embodiment 2, as shown in fig. 9, a flange 141 is fixed to an end portion 81a of the cooling water supply pipe 81. Flange portion 142 is fixed to end portions 82a, 61a of cooling water discharge pipe 82 and lubricant oil supply pipe 61. The flange 141 has a circular shape, and the cooling water supply pipe 81 is inserted and fixed into the through hole 141 a. The cooling water supply pipe 81 has a contact portion 141b as a rotation stop mechanism formed on an outer peripheral surface thereof. Flange portion 142 has an elongated plate shape, and cooling water discharge pipe 82 and lubricating oil supply pipe 61 are fixedly inserted into through holes 142a and 142b formed in the central portion, and a groove portion 142c is formed on one end side and a mounting hole 142d is formed on the other end side. The contact portion 141b of the cooling water supply pipe 81 prevents rotation of the cooling water supply pipe 81 with respect to the bearing housing 23 (see fig. 8), and has a planar shape along the inner surface 142e of the groove portion 142c of the flange portion 142.

Therefore, when the cooling water supply pipe 81, the cooling water discharge pipe 82, and the lubricant supply pipe 61 are coupled to the bearing housing 23, the common flange portion 142 is fixed by the fastening bolt 114 (see fig. 8), and the cooling water discharge pipe 82 and the lubricant supply pipe 61 are coupled to the bearing housing 23. The flange portion 141 overlaps the lower portion of the flange portion 142, and thereby presses the cooling water supply pipe 81 in the insertion direction. The contact portion 141b contacts the inner surface 142e of the flange portion 142 to prevent the cooling water supply pipe 81 from rotating. Then, by fixing flange 141 with flange 142, cooling water supply pipe 81 is coupled to bearing housing 23.

In modification 2 of embodiment 2, as shown in fig. 10, a flange 151 is fixed to an end 81a of the cooling water supply pipe 81. Flange portions 152 are fixed to end portions 82a, 61a of cooling water discharge pipe 82 and lubricating oil supply pipe 61. The flange 151 has a circular shape, and the cooling water supply pipe 81 is inserted and fixed into the through hole 151 a. The cooling water supply pipe 81 has a contact portion 151b as a rotation stop mechanism formed on an outer peripheral surface thereof. The flange portion 152 has an elongated plate shape, and the cooling water discharge pipe 82 and the lubricating oil supply pipe 61 are fixedly inserted into through holes 152a and 152b formed in the central portion, and an end surface 152c is formed on one end side and a mounting hole 152d is formed on the other end side. The contact portion 151b of the cooling water supply pipe 81 is formed in a planar shape along the end surface 152c of the flange portion 152, and prevents rotation of the cooling water supply pipe 81 with respect to the bearing housing 23 (see fig. 8).

Therefore, when the cooling water supply pipe 81, the cooling water discharge pipe 82, and the lubricant oil supply pipe 61 are coupled to the bearing housing 23, the common flange portion 152 is fixed by the fastening bolt 114 (see fig. 8), and the cooling water discharge pipe 82 and the lubricant oil supply pipe 61 are coupled to the bearing housing 23. The flange 151 overlaps the lower side of the flange 152, and thereby presses the cooling water supply pipe 81 in the insertion direction. The contact portion 151b contacts the end surface 152c of the flange portion 152 to prevent the cooling water supply pipe 81 from rotating. Then, the flange portion 151 is fixed by the flange portion 152, and the cooling water supply pipe 81 is coupled to the bearing housing 23.

As described above, in the supercharger according to embodiment 2, the flange portions 131(141, 151) are provided at the end portion 81a of the cooling water supply pipe 81, the common flange portions 132(142, 152) are provided at the end portions 82a, 61a of the cooling water discharge pipe 82 and the lubricating oil supply pipe 61, the end portion 81a of the cooling water supply pipe 81 is inserted into the cooling water supply passage 73 of the housing 11, the end portion 82a of the cooling water discharge pipe 82 is inserted into the cooling water discharge passage 74 of the housing 11, the end portion 61a of the lubricating oil supply pipe 61 is inserted into the 1 st supply passage 51 of the housing 11, and the flange portion 132 presses the flange portion 131 in the insertion direction and is fixed to the housing 11.

Therefore, by providing a common flange portion 132 at the end portions 82a, 61a of the pipes 82, 61 and fixing only one flange portion 132 to the housing 11, the pipes 91, 82, 61 can be connected to the housing 11, and the structure can be simplified and workability can be improved.

In the supercharger according to embodiment 2, a contact portion 131b is provided as a rotation stop mechanism, where the flange portion 131 contacts the regulating surface 109 of the housing 11. Therefore, the rotation of the cooling water supply pipe 81 can be easily stopped without changing the structure of the cooling water supply pipe 81.

In the supercharger according to embodiment 2, a contact portion 141b (151b) where the cooling water supply pipe 81 contacts the flange portion 142(152) is provided as a rotation stop mechanism. Therefore, the rotation of the cooling water supply pipe 81 can be easily stopped without changing the structure of the flange portion 142 of the cooling water supply pipe 81.

In the supercharger according to embodiment 2, the 1 st mounting surface 106 of the housing 11 on which the cooling water supply channel 73 is formed and the 2 nd mounting surface 107 of the housing 11 on which the cooling water discharge channel 74 and the 1 st supply channel 51 are formed are flat surfaces having the step 108, the flange portions 131(141, 151) are in contact with the 1 st mounting surface 106, and the flange portions 132(142, 152) are in contact with the 2 nd mounting surface 107. Therefore, even if the level difference 108 is provided between the 1 st mounting surface 106 and the 2 nd mounting surface 107, the flange portions 131(141, 151) are brought into contact with the 1 st mounting surface 106 and the flange portions 132(142, 152) are brought into contact with the 2 nd mounting surface 107, whereby the plurality of pipes 81, 82, 61 can be connected to the housing 11, and the plurality of pipes 81, 82, 61 can be collectively connected to the housing 11 regardless of the shape of the housing 11.

In embodiment 2, a common flange portion 132(142, 152) is provided in the cooling water discharge pipe 82 and the lubricant oil supply pipe 61 which are the plurality of 2 nd pipes of the present invention, but a common flange portion may be provided at the end portions of the plurality of 1 st pipes of the present invention.

[ embodiment 3 ]

Fig. 11 is a perspective view showing a coupling portion of piping in the exhaust turbocharger according to embodiment 3, and fig. 12 is a perspective view showing a coupling portion of piping to a housing. Note that the same reference numerals are given to members having the same functions as those of embodiment 1, and detailed description thereof is omitted.

In embodiment 3, as shown in fig. 11 and 12, the bearing housing 23 of the exhaust gas turbocharger has a 1 st mounting surface 106 and a 2 nd mounting surface 107 formed on an upper portion of an outer peripheral surface thereof, and a step 108 is provided between the 1 st mounting surface 106 and the 2 nd mounting surface 107. The 1 st mounting surface 106 is provided with a 1 st supply channel 51 (see fig. 2) and a cooling water supply channel 73 (see fig. 3), and the 2 nd mounting surface 107 is provided with a cooling water discharge channel 74 (see fig. 3) and the 1 st supply channel 51.

A flange portion 161 serving as the 1 st mounting flange is fixed to the end portion 81a of the cooling water supply pipe 81. A common flange portion 162 as a 2 nd mounting flange is fixed to the end portions 82a and 61a of the cooling water discharge pipe 82 and the lubricating oil supply pipe 61.

The flange 161 has a rectangular shape, and the cooling water supply pipe 81 is fixedly inserted into the through hole 161a, and a contact portion 161b as a rotation stopping mechanism is formed on the outer peripheral portion. The contact portion 161b is formed as a cutout portion that prevents the cooling water supply pipe 81 from rotating relative to the bearing housing 23. The bearing housing 23 has a projection 165 formed on the 2 nd mounting surface 107, and the contact portion 161b can contact the projection 165. The flange portion 162 has an elongated plate shape, and the cooling water discharge pipe 82 and the lubricant oil supply pipe 61 are fixedly inserted into through holes 162a and 162b formed in the center portion and the one end portion side, and the mounting hole 162c is formed in the other end portion side.

The end 81a of the cooling water supply pipe 81 is inserted into the cooling water supply passage 73 of the bearing housing 23, and the lower surface of the flange 161 is closely attached to the 1 st mounting surface 106 of the bearing housing 23 without a gap. An end 82a of the cooling water discharge pipe 82 is inserted into the cooling water discharge passage 74 of the bearing housing 23, and an end 61a of the lubricant oil supply pipe 61 is inserted into the 1 st supply passage 51 of the bearing housing 2. At this time, the lower surface of the flange portion 162 on the one end side is closely attached to the upper surface of the flange portion 161 of the cooling water supply pipe 81 without a gap, and the other lower surface is closely attached to the 2 nd mounting surface 107 of the bearing housing 23 without a gap. The fastening bolt 114 is inserted through the mounting hole 162c of the flange portion 162 and screwed into the screw hole 105. The contact portion 161b of the flange portion 161 contacts the projection 165 formed on the 1 st mounting surface 106 of the bearing housing 23.

Therefore, the common flange portion 162 is fixed to the 2 nd mounting surface 107 by the fastening bolt 114, whereby the cooling water discharge pipe 82 and the lubricant oil supply pipe 61 are coupled to the bearing housing 23. The flange 161 overlaps the lower side of the flange 162, and thereby presses the cooling water supply pipe 81 in the insertion direction. The contact portion 161b of the flange 161 contacts the projection 165 of the bearing housing 23 to prevent the cooling water supply pipe 81 from rotating. Therefore, the bearing housing 23 and the flange portion 162 are fixed to the 1 st mounting surface 106, and the cooling water supply pipe 81 is coupled to the bearing housing 23.

As described above, in the supercharger according to embodiment 3, the flange portion 161 is provided at the end portion 81a of the cooling water supply pipe 81, the common flange portion 162 is provided at the end portions 82a, 61a of the cooling water discharge pipe 82 and the lubricating oil supply pipe 61, the end portion 81a of the cooling water supply pipe 81 is inserted into the cooling water supply passage 73 of the housing 11, the end portion 82a of the cooling water discharge pipe 82 is inserted into the cooling water discharge passage 74 of the housing 11, the end portion 61a of the lubricating oil supply pipe 61 is inserted into the 1 st supply passage 51 of the housing 11, the flange portion 162 presses the flange portion 161 in the insertion direction and is fixed to the housing 11, and the contact portion 161b of the flange portion 161 is in contact with the protrusion 165 of the housing 11.

Therefore, by providing the flange portion 162 common to the end portions 82a, 61a of the pipes 82, 61 and fixing only one flange portion 162 to the housing 11, the pipes 91, 82, 61 can be connected to the housing 11, and the structure can be simplified and workability can be improved.

[ 4 th embodiment ]

Fig. 13 is a perspective view showing a coupling portion of a pipe in the exhaust turbocharger according to embodiment 4, fig. 14 is a perspective view showing a coupling portion of a pipe to a housing, and fig. 15 is a sectional view showing a coupling portion of a pipe. Note that the same reference numerals are given to members having the same functions as those of embodiment 1, and detailed description thereof is omitted.

In embodiment 4, as shown in fig. 13 and 14, a flange 171 is fixed to an end 81a of the cooling water supply pipe 81. Flange 172 is fixed to ends 82a, 61a of cooling water discharge pipe 82 and lubricant oil supply pipe 61. The flange portion 171 has a rectangular shape, and a cooling water supply pipe 81 is fixedly inserted into the through hole 171a, and a contact portion 171b as a rotation stopping mechanism is formed on the outer peripheral portion. The contact portion 171b is formed in a claw shape to prevent rotation of the cooling water supply pipe 81 with respect to the bearing housing 23. The bearing housing 23 has a recess 175 formed in the 2 nd mounting surface 107, and the contact portion 171b can contact the recess 175. The flange portion 172 has an elongated plate shape, and the cooling water discharge pipe 82 and the lubricant oil supply pipe 61 are fixedly inserted into through holes 172a and 172b formed in the center portion and the one end portion side, and a mounting hole 172c is formed in the other end portion side.

The end 81a of the cooling water supply pipe 81 is inserted into the cooling water supply passage 73 of the bearing housing 23, and the lower surface of the flange portion 171 is closely attached to the 1 st mounting surface 106 of the bearing housing 23 without a gap. An end 82a of the cooling water discharge pipe 82 is inserted into the cooling water discharge passage 74 of the bearing housing 23, and an end 61a of the lubricant oil supply pipe 61 is inserted into the 1 st supply passage 51 of the bearing housing 2. At this time, the lower surface of the flange portion 172 on the one end side is closely attached to the upper surface of the flange portion 171 of the cooling water supply pipe 81 without a gap, and the other lower surfaces are closely attached to the 2 nd mounting surface 107 of the bearing housing 23 without a gap. The fastening bolt 114 is inserted through the mounting hole 162c of the flange portion 162 and screwed into the screw hole 105. The contact portion 161b of the flange portion 161 contacts the recess 175 formed in the 1 st mounting surface 106 of the bearing housing 23.

As shown in fig. 15, the contact portion 161b is formed such that a projecting piece projecting outward from the outer peripheral portion of the flange portion 171 is bent at an angle greater than 90 degrees toward the 2 nd mounting surface 107 side. On the other hand, the recess 175 is formed in an inclined direction approaching the cooling water supply passage 73 from the 2 nd mounting surface 107 of the bearing housing 23 with respect to the axial direction of the cooling water supply passage 73. The bending direction of the contact portion 161b is substantially the same as the inclination direction of the recess 175. When the cooling water supply pipe 81 is inserted into the cooling water supply passage 73 and the flange portion 171 is in contact with the 2 nd mounting surface 107, the contact portion 161b is in contact with the recessed portion 175 by elastic deformation. Here, the contact portion 161b contacts the recess 175, and thus the cooling water supply pipe 81 is prevented from not only rotating with respect to the bearing housing 23 but also falling off.

Therefore, as shown in fig. 14, the common flange portion 172 is fixed to the 2 nd mounting surface 107 by the fastening bolt 114, whereby the cooling water discharge pipe 82 and the lubricating oil supply pipe 61 are coupled to the bearing housing 23. The flange 171 overlaps the lower side of the flange 172, and presses the cooling water supply pipe 81 in the insertion direction. The contact portion 171b of the flange portion 171 contacts the recess 175 of the bearing housing 23 to prevent the cooling water supply pipe 81 from rotating. Therefore, the cooling water supply pipe 81 is coupled to the bearing housing 23 by fixing the bearing housing 23 and the flange portion 172 to the 1 st mounting surface 106.

As described above, in the supercharger according to embodiment 4, the flange portion 171 is provided at the end portion 81a of the cooling water supply pipe 81, the common flange portion 172 is provided at the end portions 82a, 61a of the cooling water discharge pipe 82 and the lubricating oil supply pipe 61, the end portion 81a of the cooling water supply pipe 81 is inserted into the cooling water supply passage 73 of the housing 11, the end portion 82a of the cooling water discharge pipe 82 is inserted into the cooling water discharge passage 74 of the housing 11, the end portion 61a of the lubricating oil supply pipe 61 is inserted into the 1 st supply passage 51 of the housing 11, the flange portion 172 presses the flange portion 171 in the insertion direction and is fixed to the housing 11, and the contact portion 171b of the flange portion 171 is in contact with the concave portion 175 of the housing 11.

Therefore, by providing a common flange portion 172 at the end portions 82a, 61a of the pipes 82, 61 and fixing only one flange portion 172 to the housing 11, the pipes 91, 82, 61 can be connected to the housing 11, and the structure can be simplified and workability can be improved.

[ 5 th embodiment ]

Fig. 16 is a sectional view showing the electric supercharger according to embodiment 5, and fig. 17 is a sectional view showing a connection portion of a pipe to a housing.

As shown in fig. 16, an electric supercharger 200 as a supercharger of the present invention includes a housing 211, an electric motor 212, a compressor 213, a rotary shaft 214, and an inverter 215.

The housing 211 is formed hollow and has a rotating shaft 214 disposed therein, and the rotating shaft 214 is rotatably supported by bearings 221 and 222. The rotor 223 is fixed to the outer peripheral portion of the rotary shaft 214, while the stator 224 is fixed to the inner peripheral portion of the housing 211. The rotor 223 and the stator 224 are opposed to each other with a predetermined gap therebetween in the radial direction. The electric motor 212 includes a rotor 223 and a stator 224. A compressor impeller 225 of the compressor 213 is fixed to one end of the rotary shaft 214 in the axial direction. The housing 211 is provided with an air inlet 226 and a compressed air outlet 227 for the compressor wheel 225. Accordingly, air taken in from the air inlet 226 as combustion gas is compressed by the compressor wheel 225 that is driven to rotate, and is discharged as compressed air from the compressed air outlet 227. Further, the other end portion of the rotating shaft 214 in the axial direction is provided with an inverter 215.

The electric supercharger 200 configured as described above drives the rotary shaft 214 by the electric motor 212, the rotation of the rotary shaft 214 is transmitted to drive the compressor 13, and the compressor 13 compresses air and supplies the compressed air to the intake system of the internal combustion engine.

The electric supercharger 200 is provided with an inverter 215 that drives and controls the electric motor 212. Since the inverter 215 generates heat, the housing 211 is provided therein with a cooling device 231 for circulating cooling water (refrigerant). The cooling device 231 includes a cooling water annular flow passage (coolant flow passage) 232, a cooling water supply flow passage (coolant supply hole) 233, and a cooling water discharge flow passage (coolant discharge hole) 234 formed in the housing 211.

The cooling water annular flow passage 232 is provided on the inverter 215 side in the housing 211. That is, the cooling water annular flow path 232 is provided in the circumferential direction outside the radial direction of the bearing 222 in the housing 211. The annular cooling water flow path 232 is a continuous flow path in the circumferential direction, but is blocked by providing an end portion at the upper portion of the housing 211.

The cooling water supply channel 233 and the cooling water discharge channel 234 are provided in the radial direction at the upper portion of the housing 211.

The cooling water supply channel 233 and the cooling water discharge channel 234 are arranged in parallel in the circumferential direction of the housing 211.

The housing 211 has a mounting surface 240 formed on an upper portion of an outer circumferential surface thereof. The cooling water supply channel 233 and the cooling water discharge channel 234 are provided so as to open in a direction perpendicular to the mounting surface 240. The cooling water supply channel 233 and the cooling water discharge channel 234 are arranged in this order in a horizontal direction intersecting the axial direction of the rotary shaft 214. The distal end of the cooling water supply passage 233 communicates with one end of the cooling water annular passage 232 via a connecting passage 235. The cooling water discharge passage 234 communicates with the other end of the cooling water annular passage 232 via a connecting passage 236.

One end of the cooling water supply pipe 241 is connected to the discharge side of a cooling water pump, not shown, and the other end is connected to the cooling water supply passage 233. One end of the cooling water discharge pipe 242 is connected to the cooling water discharge passage 234, and the other end is connected to the suction side of the cooling water pump.

As shown in fig. 17, a flange portion 151 as a 1 st mounting flange is fixed to an end portion 241a of the cooling water supply pipe 241 connected to the housing 211. A flange portion 252 serving as a 2 nd mounting flange is fixed to an end portion 242a of the cooling water discharge pipe 242 connected to the case 211.

The flange 251 has a cooling water supply pipe 241 inserted and fixed into the through hole 251a, and a contact portion 251b as a rotation stop mechanism formed on the outer peripheral portion. The contact portion 251b is a concave portion having a curved shape along the outer peripheral surface of the cooling water discharge pipe 242, and prevents the cooling water supply pipe 241 from rotating with respect to the housing 211. The flange portion 252 has a cooling water discharge pipe 242 inserted and fixed through a through hole 252a formed in one end portion side, and a mounting hole 252b formed in the other end portion side.

An end portion 241a of the cooling water supply pipe 241 is inserted into the cooling water supply passage 233 of the housing 211, and the lower surface of the flange portion 251 is closely attached to the mounting surface 240 of the housing 211 without a gap. An end 242a of the cooling water discharge pipe 242 is inserted into the cooling water discharge passage 234 of the housing 211, and a lower surface of one end of the flange portion 252 is closely attached to an upper surface of the flange portion 251 of the cooling water supply pipe 241 without a gap, and the other lower surfaces are closely attached to the mounting surface 240 of the housing 211 without a gap. The fastening bolt 253 is inserted through the mounting hole 252b of the flange portion 252 and screwed into the screw hole 254. The contact portion 251b of the flange portion 251 is in contact with the outer peripheral surface of the cooling water discharge pipe 242.

Therefore, the flange portion 252 is fixed to the mounting surface 240 by the fastening bolt 253, and the cooling water discharge pipe 242 is coupled to the housing 211. The flange portion 251 overlaps the lower portion of the flange portion 252, and thereby presses the cooling water supply pipe 241 in the insertion direction of the cooling water supply pipe 241. The contact portion 251b of the flange portion 251 contacts the outer peripheral surface of the cooling water discharge pipe 242 to prevent the cooling water supply pipe 241 from rotating. Therefore, flange 151 is fixed to mounting surface 240 via cooling water discharge pipe 242 and flange 152, and cooling water supply pipe 241 is coupled to case 211.

As described above, the supercharger according to embodiment 5 is an electric supercharger 200 including an electric motor 212 for driving and rotating a rotary shaft 214, a compressor 13 having a compressor impeller 33 provided at one end in the axial direction of the rotary shaft 14, and an inverter 215 for driving and controlling the electric motor 212.

Therefore, in the electric supercharger 200, the plurality of pipes 241 and 242 can be connected to the housing 211 collectively, and the increase in cost can be suppressed by suppressing the increase in size of the housing 211, the occurrence of machining work of the mounting surface 240, and the like.

In the above-described embodiment, the lubricating oil supply pipe 61, the cooling water supply pipe 81, and the cooling water discharge pipe 82 as pipes are connected to the upper portion of the housing 11 in a collective manner in the exhaust turbocharger 10, and the cooling water supply pipe 241 and the cooling water discharge pipe 242 as pipes are connected to the upper portion of the housing 211 in a collective manner in the electric supercharger 200, but the present invention is not limited to this configuration. For example, in the exhaust turbocharger 10, only the cooling water supply pipe 81 and the cooling water discharge pipe 82 as pipes may be connected to the lower portion of the housing 11 in a collective manner. In the exhaust turbocharger 10, the lubricating oil supply pipe 61 and the lubricating oil discharge pipe 62 as pipes may be connected to the lower portion of the casing 11 in a collective manner, or the cooling water supply pipe 81 or the cooling water discharge pipe 82 may be connected to the lower portion of the casing 11 in a collective manner.

In the above embodiment, the mounting flange provided in the pipe is fastened to the housing by the fastening bolt 114, but the present invention is not limited to this configuration. For example, the flange for attachment provided in the pipe may be fixed to the housing by using the contact portion 171b of the flange portion 171 and the recess 175 of the bearing housing 23 in embodiment 4. That is, the contact portion 171b and the recess 175 may be used instead of the fastening bolt 114 and the screw hole 115 of embodiment 1.

In the above embodiment, the mounting surfaces 101, 106, and 107 of the bearing housing 23 are horizontal surfaces, but may be inclined or curved surfaces. In this case, the flow paths 51, 73, and 74 may be perpendicular to the mounting surface or may be inclined. Further, when a plurality of flow paths 51, 73, 74 are provided on the mounting surface, mounting surfaces with different angles may be provided for the flow paths 51, 73, 74.

Description of the symbols

10-exhaust-gas turbocharger 11-housing, 12-turbine, 13-compressor, 14-rotating shaft, 21-turbine housing, 22-compressor housing, 23-bearing housing, 24, 25-journal bearing, 26-thrust bearing, 41-oil supply device, 42-lubricant supply flow path, 43-lubricant discharge flow path, 51-1 st supply flow path (lubricant supply hole), 52-2 nd supply flow path, 53-3 rd supply flow path, 54-4 th supply flow path, 55-5 th supply flow path, 56-1 st discharge flow path, 57-2 nd discharge flow path, 61-lubricant supply piping (2 nd piping), 61 a-end, 62-lubricant discharge piping, 71-cooling device, 72-cooling water annular flow path (refrigerant flow path), 73-a cooling water supply channel (refrigerant supply hole), 74-a cooling water discharge channel (refrigerant discharge hole), 75, 76-a connecting channel, 81-a cooling water supply pipe (1 st pipe, 3 rd pipe), 81 a-an end, 82-a cooling water discharge pipe (1 st pipe), 82 a-an end, 101-a mounting surface, 105-a screw hole, 106-a 1 st mounting surface, 107-a 2 nd mounting surface, 108-a step, 109-a regulating surface, 111, 131, 141, 151, 161, 171-a flange portion (1 st mounting flange), 112, 132, 142, 152, 162, 172-a flange portion (2 nd mounting flange), 113-a flange portion (1 st mounting flange, 3 rd mounting flange), 113b, 131b, 141b, 151b, 161b, 171 b-a contact portion, 114-fastening bolts, 200-electric supercharger, 211-housing, 212-electric motor, 213-compressor, 214-rotary shaft, 215-inverter, 231-cooling device, 232-cooling water annular flow path (refrigerant flow path), 233-cooling water supply flow path (refrigerant supply hole), 234-cooling water discharge flow path (refrigerant discharge hole), 235, 236-connecting flow path, 240-mounting surface, 241-cooling water supply piping (1 st piping, 3 rd piping), 241 a-end, 242-cooling water discharge piping (1 st piping), 242 a-end, 251-flange portion (1 st mounting flange), 251 b-contact portion, 252-flange portion (2 nd mounting flange), 253-fastening bolt, 254-screw hole.