阅读说明：本技术 压缩机 (Compressor ) 是由 永原显治 于 2020-04-15 设计创作，主要内容包括：压缩机(1)包括筒状的机壳(10)和收纳于机壳(10)内的压缩机构(20)。压缩机构(20)具有机架(21),该机架(21)包括压接在机壳(10)上的压接部(22)、以及焊接在机壳(10)上的焊接部(23)。压接部(22)的至少一部分和焊接部(23)的至少一部分在机壳(10)的周向上并列布置。(A compressor (1) is provided with a cylindrical casing (10) and a compression mechanism (20) housed in the casing (10). The compression mechanism (20) has a frame (21), and the frame (21) includes a press-contact portion (22) that is press-contacted to the housing (10), and a welding portion (23) that is welded to the housing (10). At least a part of the crimping part (22) and at least a part of the welding part (23) are juxtaposed in the circumferential direction of the casing (10).)

1. A compressor, characterized by:

the compressor comprises a cylindrical casing (10) and a compression mechanism (20) accommodated in the casing (10),

the compressing mechanism (20) has a frame (21), the frame (21) includes a press-contact portion (22) press-contacted on the housing (10) and a welding portion (23) welded on the housing (10),

at least a part of the crimping part (22) and at least a part of the welding part (23) are juxtaposed in a circumferential direction of the casing (10).

2. The compressor of claim 1, wherein:

the compressor includes communication passages (26-29) that communicate the welding portion (23) with an internal space of the casing (10).

3. The compressor of claim 2, wherein:

the welding part (23) is formed by a concave part (24) formed on the frame (21),

the communication paths (26-29) are formed by communication gaps (26, 27) formed between the housing (10) and the frame (21) and communicating the recess (24) with the internal space of the housing (10).

4. A compressor according to any one of claims 1 to 3, wherein:

a plurality of welding parts (23) are arranged on the circumferential direction of the machine shell (10).

5. The compressor of any one of claims 1 to 4, wherein:

a plurality of welding parts (23) are arranged in the axial direction of the casing (10).

6. The compressor of claim 5, wherein:

the compression mechanism (20) is configured to: a first load and a second load larger than the first load are generated at the positions separated from each other in the axial direction in accordance with the operation of the compression mechanism (20),

the plurality of welds (23) include: two of the welds (23) having an intermediate point (M2) at a position where the second load is generated are closer in the axial direction than an intermediate point (M1) between the position where the first load is generated and the position where the second load is generated.

Technical Field

The present disclosure relates to a compressor.

Background

Heretofore, there has been known a compressor including a casing and a frame (housing) fixed to the casing by crimping and welding (for example, patent document 1). When the fluid is compressed, a load is applied between the housing and the frame. The fixed portion receives the load.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2017-25762

Disclosure of Invention

Technical problems to be solved by the invention

In patent document 1, a portion where the housing is fixed to the chassis by press-fitting and a portion where the housing is fixed to the chassis by welding are separated in the axial direction of the housing. Therefore, the axial length of the compressor is increased, and the compressor may be increased in size.

The purpose of the present disclosure is: the compressor is miniaturized.

Technical solution for solving technical problem

A first aspect of the present disclosure is directed to a compressor 1. The compressor 1 includes a cylindrical casing 10, and a compression mechanism 20 housed in the casing 10, the compression mechanism 20 having a frame 21, the frame 21 including a press-contact portion 22 press-contacted to the casing 10, and a welding portion 23 welded to the casing 10, at least a part of the press-contact portion 22 and at least a part of the welding portion 23 being juxtaposed in a circumferential direction of the casing 10.

In the first aspect, at least a part of the crimping portion 22 and at least a part of the welding portion 23 are juxtaposed in the circumferential direction of the casing 10. Thereby, as compared with the case where the pressure-bonding section 22 and the welding section 23 are arranged in parallel in the axial direction of the casing 10, the frame 21 can be downsized in the axial direction, and further, the compressor 1 can be downsized.

A second aspect of the present disclosure is characterized in that, on the basis of the first aspect: the compressor includes communication passages 26 to 29 for communicating the welding portion 23 with an internal space of the casing 10.

In the second aspect, the welding portion 23 communicates with the internal space of the housing 10 through the communication paths 26 to 29. Accordingly, when the frame 21 is welded to the housing 10, the welding gas escapes to the internal space of the housing 10 through the communication passages 26 to 29, and the occurrence of a welding failure can be suppressed.

A third aspect of the present disclosure is, on the basis of the second aspect, characterized in that: the welding portion 23 is formed by a recess 24 formed in the frame 21, and the communication paths 26 to 29 are formed by communication gaps 26 and 27 formed between the housing 10 and the frame 21 and communicating the recess 24 with the internal space of the housing 10.

In the third aspect, when the frame 21 is welded to the casing 10, the welding gas escapes from the recess 24 to the inner space of the casing 10 via the communication gaps 26, 27. Thus, the occurrence of a welding failure can be suppressed with such a simple structure of the recess 24 and the communication gaps 26 and 27.

A fourth aspect of the present disclosure is, on the basis of any one of the first to third aspects, characterized in that: a plurality of the welding parts 23 are provided in the circumferential direction of the casing 10.

In the fourth aspect, the load accompanying the compression of the fluid can be further received.

A fifth aspect of the present disclosure is, on the basis of any one of the first to fourth aspects, characterized in that: a plurality of the welding portions 23 are provided in the axial direction of the casing 10.

In the fifth aspect, the load accompanying the compression of the fluid can be further received.

A sixth aspect of the present disclosure is, on the basis of the fifth aspect, characterized in that: the compression mechanism 20 is configured to: in accordance with the operation of the compression mechanism 20, a first load and a second load larger than the first load are generated at the positions spaced apart from each other in the axial direction, and the plurality of welded portions 23 include: two of the welds 23 having an intermediate point M2 at positions where the second load is generated are closer in the axial direction than an intermediate point M1 between the position where the first load is generated and the position where the second load is generated.

In the sixth aspect, due to the first load and the second load, a moment is generated at a position closer to the position where the second load is generated than the intermediate point M1 of the positions where both loads are generated. The moment can be appropriately supported by the two welded portions 23.

Drawings

Fig. 1 is a longitudinal sectional view showing a configuration of a compressor in the first embodiment.

Fig. 2 is a longitudinal sectional view showing a main part of the compressor in the first embodiment.

Fig. 3 is a perspective view showing a main part of the chassis in the first embodiment.

Fig. 4 is a schematic plan view showing the compressor in the first embodiment.

Fig. 5 is a longitudinal sectional view showing a main part of the compressor in the second embodiment.

Fig. 6 is a perspective view showing a main part of a chassis in the second embodiment.

Detailed Description

(first embodiment)

The first embodiment is explained below. The compressor 1 of the present embodiment is a scroll compressor. The type of the compressor 1 is not limited to the scroll compressor.

As shown in fig. 1 and 2, the compressor 1 is provided in, for example, a vapor compression type refrigerant circuit (not shown) and compresses a refrigerant (one example of a fluid). For example, in such a refrigerant circuit, the refrigerant compressed by the compressor 1 is condensed in a condenser, reduced in pressure by a pressure reducing mechanism, evaporated in an evaporator, and sucked into the compressor 1.

The compressor 1 includes a casing 10, a compression mechanism 20, a motor 50, and a drive shaft 60.

The casing 10 is formed in a cylindrical shape having a long longitudinal length and both closed ends. The compression mechanism 20 and the motor 50 are housed in the casing 10 in this order from the upper side. The compression mechanism 20 and the motor 50 are coupled by a drive shaft 60 extending in the axial direction (vertical direction) in the casing 10.

The casing 10 is provided with a suction pipe 11 and a discharge pipe 12. The suction pipe 11 axially penetrates the upper portion of the casing 10 and is connected to the compression mechanism 20. The suction pipe 11 introduces a low-pressure fluid (e.g., a gaseous refrigerant) to the compression mechanism 20. The discharge pipe 12 radially penetrates the body of the casing 10 and communicates with the internal space of the casing 10. The discharge pipe 12 guides the high-pressure fluid inside the casing 10 to the outside of the casing 10.

The compression mechanism 20 is housed in the casing 10. The compression mechanism 20 is configured to: the fluid introduced through the suction pipe 11 is compressed and discharged into the cabinet 10. The configuration of the compression mechanism 20 will be described in detail later.

The motor 50 is housed in the casing 10 and disposed below the compression mechanism 20. The motor 50 has a stator 51 and a rotor 52. The stator 51 is formed in a substantially cylindrical shape and fixed to the housing 10. The rotor 52 is inserted into the inner periphery of the stator 51 and is rotatable. The drive shaft 60 is inserted into and fixed to the inner periphery of the rotor 52.

The drive shaft 60 has a main shaft portion 61 and an eccentric shaft portion 62. The main shaft portion 61 extends in the axial direction (vertical direction) of the housing 10. The eccentric shaft portion 62 is provided at the upper end of the main shaft portion 61. The outer diameter of the eccentric shaft portion 62 is smaller than the outer diameter of the main shaft portion 61. The axis of the eccentric shaft 62 is eccentric by a predetermined distance from the axis of the main shaft 61.

Next, the structure of the compression mechanism 20 will be described with reference to fig. 1 to 4.

As shown in fig. 1 and 2, the compression mechanism 20 includes a frame 21, a fixed scroll 30, and a movable scroll 40. The housing 21 is disposed inside the cabinet 10. The fixed scroll 30 is fixed to the frame 21. The orbiting scroll 40 is disposed between the frame 21 and the fixed scroll 30. The orbiting scroll 40 is configured to mesh with the fixed scroll 30 and perform eccentric orbiting motion with respect to the fixed scroll 30.

The housing 21 is fixed in the casing 10, and divides an inner space of the casing 10 into two spaces in an axial direction. The space on the upper side of the frame 21 constitutes a first space S1, and the space on the lower side of the frame 21 constitutes a second space S2.

The frame 21 is fixed on the inner circumferential surface of the casing 10. As shown in fig. 3, the frame 21 includes a crimping portion 22 and a welding portion 23. The press contact part 22 is press-contacted to the casing 10. The welding portion 23 is welded to the cabinet 10.

The press contact portion 22 is formed by the outer peripheral surface of the frame 21. The axial length (vertical length) of the press contact portion 22 is shorter than the axial length of the frame 21. The crimping portion 22 is crimped and fixed to the body portion of the casing 10.

The welding portion 23 is constituted by a recess 24 formed on the outer peripheral surface of the frame 21. A welding pin 25 is provided in the recess 24. The welding pin 25 is melted by welding through the welding through hole 13 formed in the housing 10, and fixes the frame 21 and the housing 10 to each other.

A plurality of (two in this example) welding portions 23 (fig. 2) are provided in the axial direction of the casing 10. A plurality of (four in this example) welding portions 23 (fig. 4) are provided in the circumferential direction of the casing 10.

A first gap 26 is formed between the outer circumferential surfaces of the frame 21 and the fixed scroll 30 and the inner circumferential surface of the casing 10 at a position above the upper welding portion 23 (the recess 24). The portion of the frame 21 above the pressure-bonding portion 22 is a small diameter portion 21a having a smaller diameter than the pressure-bonding portion 22. The outer peripheral surface of the fixed scroll 30 is substantially flush with the outer peripheral surface of the small diameter portion 21 a. The first gap 26 is formed between the outer peripheral surface and the small diameter portion 21a of the fixed scroll 30 and the inner peripheral surface of the casing 10. The first gap 26 communicates the upper welding portion 23 with the first space S1. The first gap 26 constitutes a communication gap.

A second gap 27 is formed between the outer circumferential surface of the frame 21 and the inner circumferential surface of the housing 10 at a position lower than the lower welding portion 23 (recess 24). The portion of the frame 21 below the press-contact portion 22 is a small diameter portion 21b having a smaller diameter than the press-contact portion 22. The second gap 27 is formed between the small diameter portion 21b and the inner circumferential surface of the housing 10. The second gap 27 communicates the lower welding portion 23 with the second space S2. The second gap 27 constitutes a communication gap.

As shown in fig. 2 and 3, at least a part of the crimping portion 22 and at least a part of the welding portion 23 (the recess 24) are arranged side by side with each other in the circumferential direction of the casing 10. At least a part of the crimping portion 22 and at least a part of the welding portion 23 (the recess 24) are close to each other in the circumferential direction of the casing 10. At least a part of the crimping portion 22 and at least a part of the welding portion 23 (the recess 24) are arranged substantially adjacent to each other in the circumferential direction of the casing 10.

At least a part of the crimping portion 22 and at least a part of the welding portion 23 (recess 24) are arranged side by side with each other in the axial direction of the casing 10. At least a part of the crimping portion 22 and at least a part of the welding portion 23 (the recess 24) are close to each other in the axial direction of the casing 10. At least a part of the crimping portion 22 and at least a part of the welding portion 23 (the recess 24) are arranged substantially adjacent to each other in the axial direction of the casing 10.

Therefore, at least a part of the crimping portion 22 and at least a part of the welding portion 23 (the recess 24) are arranged side by side with each other in the circumferential direction and the axial direction of the casing 10. At least a part of the pressure-bonding section 22 and at least a part of the welding section 23 (recess 24) are close to each other in the circumferential direction and the axial direction of the casing 10. At least a part of the crimping portion 22 and at least a part of the welding portion 23 (the recess 24) are arranged substantially adjacent to each other in the circumferential direction and the axial direction of the casing 10. Thereby, the casing 10 and the chassis 21 are more firmly fixed to each other.

The fixed scroll 30 is arranged on one side (upper side in this example) in the axial direction of the frame 21. The fixed scroll 30 has a fixed-side end plate 31, a fixed-side wrap 32, and an outer circumferential wall 33.

The stationary-side end plate 31 is formed in an approximately circular plate shape. The fixed wrap 32 is formed in a spiral wall shape drawing an involute curve, and protrudes from a front surface (a lower surface in this example) of the fixed end plate 31. Outer circumferential wall 33 is formed to surround the outer circumferential side of stationary wrap 32 and projects from the front surface of stationary end plate 31. A front end surface (a lower end surface in this example) of the fixed-side wrap 32 is substantially flush with a front end surface of the outer circumferential wall portion 33.

An intake port (not shown) is formed in the outer peripheral wall 33 of the fixed scroll 30. The suction port is connected to the downstream end of the suction pipe 11. A discharge port 34 penetrating the stationary end plate 31 in the thickness direction is formed in the center of the stationary end plate 31 of the stationary scroll 30.

The orbiting scroll 40 has an orbiting side end plate 41, an orbiting side wrap 42, and a flange portion 43.

The movable-side end plate 41 is formed in an approximately circular plate shape. The orbiting wrap 42 is formed in a spiral wall shape drawing an involute curve, and protrudes from a front surface (an upper surface in this example) of the orbiting end plate 41. The flange portion 43 is formed in a cylindrical shape and is disposed at a central portion of the back surface (lower surface in this example) of the moving-side end plate 41. The orbiting wrap 42 of the orbiting scroll 40 meshes with the stationary wrap 32 of the stationary scroll 30.

According to the above configuration, the compression chamber S20 is formed between the fixed scroll 30 and the orbiting scroll 40. The compression chamber S20 is a space for compressing the fluid. The compression chamber S20 is configured to: compresses the fluid sucked through the suction port from the suction pipe 11, and discharges the compressed fluid through the discharge port 34.

The compression mechanism 20 is configured to: in accordance with this operation (operation in which the orbiting scroll 40 eccentrically revolves with respect to the fixed scroll 30), a compression load is generated in the compression chamber S20, and a bearing load is generated in the main shaft portion 61 of the drive shaft 60. The phases of the compression load and the bearing load are shifted from each other in the rotational direction. Typically, the compression load is less than the bearing load, and the two are out of phase with each other by about 180 °. The compression load is an example of the first load, and the bearing load is an example of the second load.

As shown in fig. 2, the middle point M2 of the two welded portions 23 (recessed portions 24) arranged in line in the axial direction of the casing 10 is closer to the position where the bearing load is generated than the middle point M1 between the position where the compression load is generated and the position where the bearing load is generated. More specifically, the upper-side welded portion 23 is located above the inverse proportion division point of the compression load and the bearing load, and the lower-side welded portion 23 is located below the inverse proportion division point. Here, the ratio of the magnitude of the compression load to the bearing load is a: in the case of b, assuming that the axial distance between the inversely proportional internal division point and the axial center of compression chamber S20 is D1, and assuming that the axial distance between the inversely proportional internal division point and the axial center of main shaft portion 61 is D2, the relationship of D1 × a — D2 × b is established.

Effects of the first embodiment

The compressor 1 of the present embodiment includes a cylindrical casing 10, and a compression mechanism 20 housed in the casing 10, the compression mechanism 20 having a frame 21, the frame 21 including a press-contact portion 22 press-contacted to the casing 10, and a welding portion 23 welded to the casing 10, at least a part of the press-contact portion 22 and at least a part of the welding portion 23 being juxtaposed in a circumferential direction of the casing 10. Therefore, at least a part of the crimping portion 22 and at least a part of the welding portion 23 are juxtaposed in the circumferential direction of the casing 10. Thereby, as compared with the case where the pressure-bonding section 22 and the welding section 23 are arranged in parallel in the axial direction of the casing 10, the frame 21 can be downsized in the axial direction, and further, the compressor 1 can be downsized.

The compressor 1 of the present embodiment includes a first gap 26 and a second gap 27 that communicate the welding portion 23 with the internal space of the casing 10. Therefore, the welding portion 23 communicates with the internal space of the casing 10 through the first gap 26 and the second gap 27. Accordingly, when the frame 21 is welded to the housing 10, the welding gas escapes to the internal space of the housing 10 through the first gap 26 and the second gap 27, and the occurrence of a welding failure can be suppressed.

In the compressor 1 of the present embodiment, the welding portion 23 is formed by a recess 24 formed in the frame 21, and the communication passages 26 to 29 are formed by a first gap 26 and a second gap 27 formed between the casing 10 and the frame 21 and communicating the recess 24 with the internal space of the casing 10. Therefore, the occurrence of poor welding can be suppressed with a simple configuration of the recess 24 and the first and second gaps 26 and 27.

In the compressor 1 of the present embodiment, the plurality of welding portions 23 are provided in the circumferential direction of the casing 10. Therefore, the load accompanying the fluid compression can be further received.

In the compressor 1 of the present embodiment, the plurality of welding portions 23 are provided in the axial direction of the casing 10. Therefore, the load accompanying the fluid compression can be further received.

In the compressor 1 of the present embodiment, the compression mechanism 20 is configured to: in accordance with the operation of the compression mechanism 20, a compression load and a bearing load larger than the compression load are generated at the positions spaced apart from each other in the axial direction, and the plurality of welded portions 23 include: two of the welds 23 having an intermediate point M2 located closer to the position where the bearing load is generated than an intermediate point M1 between the position where the compression load is generated and the position where the bearing load is generated in the axial direction. In this configuration, due to the compression load and the bearing load, a moment is generated at a position closer to the position where the bearing load is generated than the intermediate point M1 between the positions where both loads are generated. The moment can be appropriately supported by the two welded portions 23.

(second embodiment)

The second embodiment is explained below. The configuration of the communication passage of the compressor 1 of the present embodiment is different from that of the first embodiment. Next, differences from the first embodiment will be mainly described.

As shown in fig. 5 and 6, the communication path of the present embodiment is constituted by a first communication groove 28 and a second communication groove 29 formed in the frame 21.

The first communicating groove 28 is formed in the outer circumferential surfaces of the frame 21 and the fixed scroll 30 so as to extend vertically, and communicates the upper welding portion 23 (the recessed portion 24) with the first space S1. The second communication groove 29 is formed in the outer peripheral surface of the frame 21 so as to extend vertically, and communicates the lower welding portion 23 (the concave portion 24) with the second space S2. The first communicating groove 28 and the second communicating groove 29 constitute communicating passages, respectively.

The first communicating groove 28 and the second communicating groove 29 are preferably provided corresponding to each of the plurality of (four in this example) welding portions 23 arranged in parallel in the circumferential direction of the chassis 10, respectively. The shape and arrangement of the first communicating groove 28 and the second communicating groove 29 may be designed arbitrarily as long as the respective welding portions 23 and the internal space of the casing 10 communicate with each other.

Effects of the second embodiment

The present embodiment can also obtain the same effects as those of the first embodiment.

In the compressor 1 of the present embodiment, the welding portion 23 is formed by a concave portion 24 formed in the frame 21, and the communication passages 26 to 29 are formed by a first communication groove 28 and a second communication groove 29 formed in the frame 21 and communicating the concave portion 24 with the internal space of the casing 10. Therefore, when the frame 21 is welded to the chassis 10, the welding gas escapes from the recess 24 to the internal space of the chassis 10 through the first and second communication grooves 28 and 29. Thus, the occurrence of a welding failure can be suppressed with such a simple structure of the recess 24 and the first and second communication grooves 28, 29.

(other embodiments)

The above embodiment may have the following configuration.

For example, a plurality of welding portions 23 may be provided in the axial direction of the casing 10. Here, when three or more welded portions 23 are provided, it is preferable that the three or more welded portions 23 include two welded portions 23 whose intermediate point M2 is located closer to the position where the bearing load is generated than the intermediate point M1 between the position where the compression load is generated and the position where the bearing load is generated.

For example, a plurality of welding portions 23 may be provided in the circumferential direction of the casing 10.

The embodiments and modifications have been described above, but it is understood that various changes and modifications can be made without departing from the spirit and scope of the claims. The above embodiments and modifications may be appropriately combined and replaced as long as the functions of the objects of the present disclosure are not affected.

Industrial applicability-

In view of the foregoing, the present disclosure is useful for compressors.

-description of symbols-

1 compressor

10 casing

20 compression mechanism

21 machine frame

22 crimping part

23 welding part

24 recess

26 first gap (communication gap, communication path)

27 second gap (communication gap, communication path)

28 first communicating groove (communicating channel)

29 second communicating groove (communicating path)

M1 midpoint

M2 midpoint