阅读说明：本技术 涡轮增压器用废气流出控制装置及涡轮增压器 (Exhaust gas outflow control device for turbocharger, and turbocharger ) 是由 谢正海 赵肖龙 龙艳平 杨庆刚 曾斌 于 2020-04-08 设计创作，主要内容包括：本发明公开了一种涡轮增压器用废气流出控制装置及涡轮增压器,由于涡轮增压器用废气流出控制装置中的阀盘设置有沿阀盘的周向间隔设置并沿阀盘的轴线方向贯穿阀盘的多个气流调节孔,导流阀座设置有沿导流阀座的周向间隔设置的多个气流调节孔,在使用过程中,可以调节阀盘上的气流调节孔与导流阀座上对应的气流调节孔的相对位置,以调节导流阀座上的气流调节孔打开的面积。进而可以根据涡轮增压器的需求调节废气流出的速度,以增加废气进入下游排气系统如催化器的气流稳定性和均匀性,提升催化器废气净化效率和工作寿命,改善汽车发动机尾气排放,适应越来越严苛的国内外排放标准,以及避免箱体由于废气流输出不均而受热开裂的风险。(The invention discloses an exhaust gas outflow control device for a turbocharger and the turbocharger, wherein a valve disc in the exhaust gas outflow control device for the turbocharger is provided with a plurality of gas flow adjusting holes which are arranged at intervals along the circumferential direction of the valve disc and penetrate through the valve disc along the axial direction of the valve disc, a flow guide valve seat is provided with a plurality of gas flow adjusting holes which are arranged at intervals along the circumferential direction of the flow guide valve seat, and the relative positions of the gas flow adjusting holes on the valve disc and the corresponding gas flow adjusting holes on the flow guide valve seat can be adjusted in the using process so as to adjust the opening area of the gas flow adjusting holes on the flow guide valve seat. And then can adjust the speed that the waste gas flows out according to turbo charger's demand to increase the air current stability and the homogeneity that waste gas got into low reaches exhaust system like the catalyst converter, promote catalyst converter exhaust gas purification efficiency and working life, improve automobile engine exhaust emission, adapt to increasingly harsher domestic and foreign emission standard, and avoid the box because the uneven risk that is heated the fracture of waste gas flow output.)

1. An exhaust gas outflow control apparatus for a turbocharger, characterized by comprising: the device comprises a box body, a fixed cylinder, a valve disc, a flow guide valve seat and a transmission mechanism; wherein the content of the first and second substances,

an air flow channel is formed inside the box body, a working air inlet and a bypass air inlet are arranged on the side wall of the box body at intervals, the working air inlet and the bypass air inlet are respectively communicated with the air flow channel, an air outlet communicated with the air flow channel is arranged at one end of the box body, the fixed cylinder is fixed in the air flow channel, one end of the fixed cylinder is communicated with the working air inlet, and the other end of the fixed cylinder is communicated with the air outlet of the air flow channel;

a bypass flow chamber is formed between the outer wall surface of the fixed cylinder and the inner wall surface of the box body, one end of the bypass flow chamber is communicated with the bypass air inlet, and the other end of the bypass flow chamber is communicated with the air outlet of the airflow channel;

the valve disc and the flow guide valve seat are sleeved on the outer wall surface of the fixed cylinder and are close to the position of the air outlet of the airflow channel, the valve disc is positioned on one side of the flow guide valve seat, which is far away from the air outlet of the airflow channel, and can rotate around the axis of the fixed cylinder relative to the fixed cylinder, and the flow guide valve seat is fixed relative to the fixed cylinder;

the transmission mechanism is arranged in the box body, a power input end of the transmission mechanism is in transmission connection with an actuator in a turbocharger, a power output end of the transmission mechanism is in transmission connection with the valve disc and is linked with the valve disc to rotate around the axis of the fixed cylinder relative to the fixed cylinder; and the number of the first and second electrodes,

the valve disc is provided with a plurality of air flow adjusting holes which are arranged along the circumferential interval of the valve disc and penetrate through the valve disc along the axial direction of the valve disc, the diversion valve seat is provided with a plurality of air flow adjusting holes which are arranged along the circumferential interval of the diversion valve seat and penetrate through the diversion valve seat along the axial direction of the diversion valve seat, the air flow adjusting holes on the valve disc and the air flow adjusting holes on the diversion valve seat are arranged in a one-to-one correspondence manner, the air flow adjusting holes of the valve disc are communicated with the bypass flow chamber, the air flow adjusting holes of the diversion valve seat are communicated with the air outlet, and when each air flow adjusting hole of the valve disc and the air flow adjusting hole arranged in the diversion valve seat in a corresponding manner, air flow in the bypass flow chamber can sequentially pass through the air flow adjusting holes of the valve disc, the air flow adjusting holes of the diversion valve seat, The air outlet is used for discharging;

the relative positions of the airflow adjusting holes in the valve disc and the corresponding airflow adjusting holes in the diversion valve seat can be adjusted through the rotation of the valve disc around the axis of the fixed cylinder relative to the fixed cylinder, so that the opening area of the airflow adjusting holes in the diversion valve seat is adjusted.

2. The exhaust gas outflow control apparatus for a turbocharger according to claim 1, wherein a side of the guide valve seat facing away from the valve disc is provided with a plurality of guide vanes at intervals along a circumferential direction of the guide valve seat, and each of the guide vanes is fixedly connected to a side of the corresponding gas flow adjusting hole to guide the gas flow flowing out of the corresponding gas flow adjusting hole.

3. The exhaust gas outflow control apparatus for a turbocharger according to claim 2, wherein the one end of the fixed cylinder abuts against an inner wall of the tank, and the other end of the fixed cylinder is fixedly connected to the guide valve seat, and the guide valve seat is fixedly connected to the inner wall of the tank to axially position the fixed cylinder.

4. The exhaust gas outflow control apparatus for a turbocharger according to claim 3, wherein the fixed cylinder is fixed to the guide valve seat as an integral structure; and the outer wall surface of the fixed cylinder is formed into a step structure.

5. The exhaust gas outflow control apparatus for a turbocharger according to claim 3, wherein a stopper is further provided on the flow guide valve seat, and one end of the stopper is fixedly connected to the flow guide valve seat, and the other end of the stopper is fixedly connected to an inner wall of the housing, so as to restrict the flow guide valve seat from rotating around an axis of the stationary cylinder relative to the stationary cylinder.

6. The exhaust gas outflow control apparatus for a turbocharger according to claim 5, wherein the diversion valve seat and the valve disk are both provided with a disk-like structure, and a convex sealing structure is formed around the air flow adjusting hole of the diversion valve seat to seal a joint of the diversion valve seat and the valve disk; and the number of the first and second electrodes,

the edge of valve disc is provided with the arc and dodges the breach, the rotatory stroke of valve disc is less than or equal to the arc dodges the arc length of breach, so that in the rotatory stroke of valve disc the locating part all passes the arc dodges the breach.

7. The exhaust gas outflow control apparatus for a turbocharger according to any one of claims 1 to 6, wherein the transmission mechanism includes a rocker arm and a valve stem, the rocker arm being fixedly connected to one end of the valve stem, the other end of the valve stem being drivingly connected to the valve disk.

8. The exhaust gas outflow control apparatus for a turbocharger according to claim 7, wherein the transmission mechanism further includes a bushing, one end of the bushing is fixedly connected to a shaft hole on the casing, the valve rod is inserted into the bushing and is in clearance fit with the bushing, and the other end of the bushing extends to a position where the rocker arm is located; and the number of the first and second electrodes,

the valve rod is provided with a rocker arm, a shaft sleeve is arranged on the rocker arm, a spring pad is arranged between the shaft sleeve and the rocker arm, and a piston ring is arranged between the shaft sleeve and the valve rod to seal the joint of the shaft sleeve and the valve rod.

9. The exhaust gas outflow control apparatus for a turbocharger according to claim 7, wherein a guide rail is provided on a side of the valve disc facing away from the guide valve seat, an inner wall surface of the guide rail is provided with an arc surface structure, and the other end of the valve stem is provided with a connecting ball head which is slidably connected with the guide rail; wherein the content of the first and second substances,

the valve rod is linked with the connecting ball head to rotate around the axis of the valve rod, so that the connecting ball head pushes the valve disc to rotate around the axis of the fixed cylinder relative to the fixed cylinder, and meanwhile, the connecting ball head slides along the inner wall face of the guide rail in the direction far away from the valve disc.

10. A turbocharger characterized by comprising the exhaust gas outflow control apparatus for a turbocharger according to any one of claims 1 to 9.

Technical Field

The invention relates to the field of automobiles, in particular to an exhaust gas outflow control device for a turbocharger and the turbocharger.

Background

In a conventional exhaust gas turbocharger product, as shown in fig. 1-2, a compressor 1 and an exhaust gas turbine box group 3 are connected through an intermediate body combination 2 to form a supercharger whole, and an actuator 5 is fixed on the compressor 1. The actuator 5 receives an Electronic Control Unit (ECU) command of the engine, and controls the bypass flow of the exhaust gas in the turbine box by driving the rocker arm 4 to a specified position, thereby achieving the purpose of controlling the pressure increase. The combustion waste gas of the engine is discharged into the waste gas turbine box 31, the turbine shaft combination arranged in the intermediate body combination 2 is driven to rotate, and the waste gas flows into the turbine box from the inlet of the turbine box along the flow passage to do work on the expansion of the turbine and then flows out of the turbine box. To control power, it is sometimes necessary to bypass the exhaust gas to prevent excessive turbo expansion work from causing the intake pressure to exceed the target. The actuator 5 pushes the rocker arm 4 to open and control the opening degree of the exhaust valve group 32, so that part of the exhaust gas flowing into the exhaust gas turbine box 31 can directly bypass and flow out of the exhaust gas turbine box 31 without applying work on the turbine shaft. When the exhaust valve bank 32 is closed, the exhaust gas is not bypassed and is used entirely to perform work on the turbo expansion. The exhaust gas, which performs work and is bypassed, is mixed disorderly at the outlet of the exhaust turbine box 31 and then flows into the downstream exhaust system, and the distribution uniformity of the exhaust gas flowing into the exhaust system, such as the speed and the temperature, is poor, thereby having adverse effects on the working efficiency and the durable service life of downstream parts, such as a three-way catalyst. In addition, the bypass exhaust gas is discharged from the single-hole passage, so that the heat load is excessively concentrated, the phenomena of shell deformation, cracking and the like are easily generated, and the working safety of the turbine is not facilitated.

Therefore, the exhaust gas outflow control apparatus in the prior art has a problem that the uniformity of the velocity distribution of the exhaust gas outflow is poor.

Disclosure of Invention

The invention aims to solve the problem that the exhaust outflow control device in the prior art is poor in uniformity of exhaust outflow speed distribution. Therefore, the present invention provides an exhaust gas outflow control device for a turbocharger and a turbocharger having the advantage of good distribution uniformity of the speed, temperature, and the like of the exhaust gas outflow in the exhaust gas outflow control device.

In order to solve the above technical problem, an embodiment of the present invention discloses an exhaust gas outflow control apparatus for a turbocharger, including: the device comprises a box body, a fixed cylinder, a valve disc, a flow guide valve seat and a transmission mechanism; wherein the content of the first and second substances,

an air flow channel is formed inside the box body, a working air inlet and a bypass air inlet are arranged on the side wall of the box body at intervals, the working air inlet and the bypass air inlet are respectively communicated with the air flow channel, an air outlet communicated with the air flow channel is arranged at one end of the box body, the fixed cylinder is fixed in the air flow channel, one end of the fixed cylinder is communicated with the working air inlet, and the other end of the fixed cylinder is communicated with the air outlet of the air flow channel;

a bypass flow chamber is formed between the outer wall surface of the fixed cylinder and the inner wall surface of the box body, one end of the bypass flow chamber is communicated with the bypass air inlet, and the other end of the bypass flow chamber is communicated with the air outlet of the airflow channel;

the valve disc and the flow guide valve seat are sleeved on the outer wall surface of the fixed cylinder and are close to the position of the air outlet of the airflow channel, the valve disc is positioned on one side of the flow guide valve seat, which is far away from the air outlet of the airflow channel, and can rotate around the axis of the fixed cylinder relative to the fixed cylinder, and the flow guide valve seat is fixed relative to the fixed cylinder;

the transmission mechanism is arranged in the box body, a power input end of the transmission mechanism is in transmission connection with an actuator in a turbocharger, a power output end of the transmission mechanism is in transmission connection with the valve disc and is linked with the valve disc to rotate around the axis of the fixed cylinder relative to the fixed cylinder; and the number of the first and second electrodes,

the valve disc is provided with a plurality of air flow adjusting holes which are arranged along the circumferential interval of the valve disc and penetrate through the valve disc along the axial direction of the valve disc, the diversion valve seat is provided with a plurality of air flow adjusting holes which are arranged along the circumferential interval of the diversion valve seat and penetrate through the diversion valve seat along the axial direction of the diversion valve seat, the air flow adjusting holes on the valve disc and the air flow adjusting holes on the diversion valve seat are arranged in a one-to-one correspondence manner, the air flow adjusting holes of the valve disc are communicated with the bypass flow chamber, the air flow adjusting holes of the diversion valve seat are communicated with the air outlet, and when each air flow adjusting hole of the valve disc and the air flow adjusting hole arranged in the diversion valve seat in a corresponding manner, air flow in the bypass flow chamber can sequentially pass through the air flow adjusting holes of the valve disc, the air flow adjusting holes of the diversion valve seat, The air outlet is used for discharging;

the relative positions of the airflow adjusting holes in the valve disc and the corresponding airflow adjusting holes in the diversion valve seat can be adjusted through the rotation of the valve disc around the axis of the fixed cylinder relative to the fixed cylinder, so that the opening area of the airflow adjusting holes in the diversion valve seat is adjusted.

By adopting the technical scheme, the waste gas outflow control device for the turbocharger is characterized in that the valve disc is provided with a plurality of air flow adjusting holes which are arranged at intervals along the circumferential direction of the valve disc and penetrate through the valve disc along the axis direction of the valve disc, the flow guide valve seat is provided with a plurality of air flow adjusting holes which are arranged at intervals along the circumferential direction of the flow guide valve seat and penetrate through the flow guide valve seat along the axis direction of the flow guide valve seat, the air flow adjusting holes on the valve disc and the air flow adjusting holes on the flow guide valve seat are arranged in a one-to-one correspondence manner, the air flow adjusting holes of the valve disc are communicated with the bypass flow chamber, the air flow adjusting holes of the flow guide valve seat are communicated with the air outlet, and when each air flow adjusting hole of the valve disc is communicated with the air flow adjusting hole arranged in the correspondence manner, the air flow adjusting hole of the flow guide valve seat and the air outlet are arranged in sequence.

And the relative positions of the airflow adjusting holes on the valve disc and the corresponding airflow adjusting holes on the diversion valve seat can be adjusted through the rotation of the valve disc around the axis of the fixed cylinder relative to the fixed cylinder, so that the opening area of the airflow adjusting holes on the diversion valve seat can be adjusted. And then can adjust the speed that the waste gas flows out according to turbo charger's demand to increase the air current stability and the homogeneity that waste gas got into low reaches exhaust system like three way catalyst converter, promote catalyst converter exhaust gas purification efficiency and working life, improve automobile engine exhaust emission, adapt to increasingly harsher domestic and foreign emission standard, and avoid the box because the uneven risk that is heated the fracture of waste gas flow output.

Another embodiment of the present invention provides an exhaust gas outflow control device for a turbocharger, wherein a plurality of guide vanes are arranged at intervals along a circumferential direction of a guide valve seat on a side of the guide valve seat away from a valve disc, and each guide vane is fixedly connected to one side of a corresponding air flow adjusting hole to guide an air flow flowing out of the corresponding air flow adjusting hole.

By adopting the technical scheme, when the waste gas in the bypass flow chamber is discharged from the airflow adjusting hole on the flow guide valve seat,

due to the arrangement of the guide vanes, the waste gas forms spiral airflow after flowing through the guide vanes of the guide valve seat, and the stability of the waste gas flowing out of the bypass flow chamber is further improved.

Another embodiment of the present invention provides an exhaust gas outflow control apparatus for a turbocharger, wherein the one end of the fixed cylinder abuts against an inner wall of the tank, the other end of the fixed cylinder is fixedly connected to the flow guide valve seat, and the flow guide valve seat is fixedly connected to the inner wall of the tank to axially position the fixed cylinder.

Another embodiment of the present invention provides an exhaust gas outflow control apparatus for a turbocharger, wherein the fixed cylinder and the guide valve seat are fixed as an integral structure; and the outer wall surface of the fixed cylinder is formed into a step structure.

By adopting the technical scheme, the fixed cylinder and the flow guide valve seat are fixed into an integral structure; and the outer wall surface of the fixed cylinder is formed into a stepped structure, and the exhaust gas outflow control device for the turbocharger in the embodiment can be more reliable by adopting the stepped structure.

Another embodiment of the present invention provides an exhaust gas outflow control device for a turbocharger, wherein a limiting member is further disposed on the flow guide valve seat, one end of the limiting member is fixedly connected to the flow guide valve seat, and the other end of the limiting member is fixedly connected to an inner wall of the box body, so as to limit the flow guide valve seat from rotating around an axis of the fixed cylinder relative to the fixed cylinder.

By adopting the technical scheme, the flow guide valve seat is further provided with the limiting part, the limiting part can limit the flow guide valve seat to rotate around the axis of the fixed cylinder relative to the fixed cylinder, and the service performance of the flow guide valve seat can be further improved.

Another embodiment of the present invention provides an exhaust gas outflow control device for a turbocharger, wherein the flow guide valve seat and the valve disc are both provided with a disc-shaped structure, and a convex sealing structure is formed around an airflow adjusting hole of the flow guide valve seat to seal a connection joint of the flow guide valve seat and the valve disc; and the number of the first and second electrodes,

the edge of valve disc is provided with the arc and dodges the breach, the rotatory stroke of valve disc is less than or equal to the arc dodges the arc length of breach, so that in the rotatory stroke of valve disc the locating part all passes the arc dodges the breach.

By adopting the technical scheme, the convex sealing structure is formed on the periphery of the airflow adjusting hole of the flow guide valve seat so as to seal the joint of the flow guide valve seat and the valve disc, and further avoid the leakage of waste gas from the joint of the flow guide valve seat and the valve disc.

In addition, the edge of valve disc is provided with the arc and dodges the breach, and the rotatory stroke of valve disc is less than or equal to the arc and dodges the arc length of breach to make locating part all pass the arc and dodge the breach in the valve disc rotatory stroke, the setting of this kind of structure can avoid the valve disc to receive the influence of locating part at the rotation in-process, and then can guarantee that the valve disc can normally rotate.

Another embodiment of the invention provides an exhaust gas outflow control device for a turbocharger, wherein the transmission mechanism comprises a rocker arm and a valve rod, the rocker arm is fixedly connected to one end of the valve rod, and the other end of the valve rod is in transmission connection with the valve disc.

Another embodiment of the invention provides a waste gas outflow control device for a turbocharger, the transmission mechanism further comprises a shaft sleeve, one end of the shaft sleeve is fixedly connected to a shaft hole on the box body, the valve rod penetrates through the shaft sleeve and is in clearance fit with the shaft sleeve, and the other end of the shaft sleeve extends to the position of the rocker arm; and the number of the first and second electrodes,

the valve rod is provided with a rocker arm, a shaft sleeve is arranged on the rocker arm, a spring pad is arranged between the shaft sleeve and the rocker arm, and a piston ring is arranged between the shaft sleeve and the valve rod to seal the joint of the shaft sleeve and the valve rod.

Adopt above-mentioned technical scheme, the piston ring is used for preventing that high-pressure waste gas from leaking through axle sleeve and valve rod clearance from turbine box inside, and the spring pad arranges and to restrict the axial degree of freedom of valve rod between these two between axle sleeve and the rocking arm, reduces the vibration noise that the axial float of valve rod arouses, is favorable to further improving the waste gas leakproofness between valve rod and axle sleeve simultaneously.

Another embodiment of the invention provides an exhaust gas outflow control device for a turbocharger, wherein a guide rail is arranged on one side of a valve disc, which is far away from a guide valve seat, the inner wall surface of the guide rail is of an arc surface structure, and a connecting ball head is arranged at the other end of a valve rod and is in sliding connection with the guide rail; wherein the content of the first and second substances,

the valve rod is linked with the connecting ball head to rotate around the axis of the valve rod, so that the connecting ball head pushes the valve disc to rotate around the axis of the fixed cylinder relative to the fixed cylinder, and meanwhile, the connecting ball head slides along the inner wall face of the guide rail in the direction far away from the valve disc.

Adopt above-mentioned technical scheme, one side that the valve disc deviates from the water conservancy diversion disk seat is provided with the guide rail, the internal face of guide rail sets up to cambered surface structure, the valve rod the other end is provided with the connection bulb, connect bulb and guide rail sliding connection, the setting of this kind of structure can make exhaust outflow controlling means for the turbo charger in the use, the bulb is connected in the valve rod linkage rotates around the axis of valve rod, make the connection bulb promote the axis that the valve coiled the solid fixed cylinder to rotate for the solid fixed cylinder, it slides towards the direction of keeping away from the valve disc to connect the bulb along the inner wall of guide rail simultaneously, when avoiding connecting the bulb and promoting the axis that the valve coiled the solid fixed cylinder to rotate for the solid fixed cylinder, it blocks to connect bulb and guide rail.

Another embodiment of the present invention provides a turbocharger that includes an exhaust gas outflow control apparatus for a turbocharger.

By adopting the technical scheme, the turbocharger comprises the exhaust gas outflow control device with the structure, a valve disc in the exhaust gas outflow control device is provided with a plurality of air flow adjusting holes which are arranged at intervals along the circumferential direction of the valve disc and penetrate through the valve disc along the axial direction of the valve disc, a flow guide valve seat is provided with a plurality of air flow adjusting holes which are arranged at intervals along the circumferential direction of the flow guide valve seat and penetrate through the flow guide valve seat along the axial direction of the flow guide valve seat, the air flow adjusting holes on the valve disc and the air flow adjusting holes on the flow guide valve seat are arranged in a one-to-one correspondence manner, the air flow adjusting holes of the valve disc are communicated with a bypass flow chamber, the air flow adjusting holes of the flow guide valve seat are communicated with an air outlet, and when each air flow adjusting hole of the valve disc is communicated with the air flow adjusting hole arranged in the correspondence manner, the air flow adjusting hole of the bypass flow valve seat can sequentially pass through the air flow adjusting hole of the valve disc and the air flow adjusting hole of the flow guide valve seat, And (4) discharging from the air outlet.

And the relative positions of the airflow adjusting holes on the valve disc and the corresponding airflow adjusting holes on the diversion valve seat can be adjusted through the rotation of the valve disc around the axis of the fixed cylinder relative to the fixed cylinder, so that the opening area of the airflow adjusting holes on the diversion valve seat can be adjusted. And then can adjust the speed that the waste gas flows out according to turbo charger's demand to increase the air current stability and the homogeneity that waste gas got into low reaches exhaust system like three way catalyst converter, promote catalyst converter exhaust gas purification efficiency and working life, improve automobile engine exhaust emission, adapt to increasingly harsher domestic and foreign emission standard, and avoid the box because the uneven risk that is heated the fracture of waste gas flow output.

Drawings

FIG. 1 is a schematic view of a turbocharger according to the prior art;

FIG. 2 is a schematic view showing an assembled structure of an exhaust gas outflow control apparatus for a turbocharger in the related art;

fig. 3 is a schematic view of an assembled structure of an exhaust gas outflow control apparatus for a turbocharger according to embodiment 1 of the present invention;

fig. 4 is an exploded view schematically showing an exhaust gas outflow control apparatus for a turbocharger according to embodiment 1 of the present invention;

fig. 5a is a schematic structural view showing a configuration in which an air flow adjusting hole in a guide valve seat in an exhaust gas outflow control apparatus for a turbocharger according to embodiment 1 of the present invention is circular;

fig. 5b is a schematic structural view showing a fan-shaped configuration of the air flow adjusting holes in the guide valve seat in the exhaust gas outflow control apparatus for a turbocharger according to embodiment 1 of the present invention;

FIG. 6 is a schematic diagram illustrating a comparison of rotation angles of two configurations of the diverter valve seat of FIG. 5;

fig. 7 is a schematic view of the internal structure of an exhaust gas outflow control apparatus for a turbocharger according to embodiment 1 of the present invention;

FIG. 8 is a schematic cross-sectional view taken along line B-B of FIG. 7;

fig. 9 is a schematic view of an exhaust gas outflow principle in the exhaust gas outflow control apparatus for a turbocharger according to embodiment 1 of the invention;

fig. 10 is a schematic structural view of a valve disc and a guide valve seat in an exhaust gas outflow control device for a turbocharger according to embodiment 1 of the present invention;

fig. 11 is a schematic structural view of the exhaust gas flow direction three-way catalyst in the exhaust gas outflow control apparatus for a turbocharger according to embodiment 1 of the present invention.

Description of reference numerals:

the prior art is as follows:

1: a compressor; 2: combining intermediates; 3: an exhaust gas turbine box set; 31: an exhaust gas turbine case; 32: an exhaust valve bank; 4: a rocker arm; 5: and an actuator.

The invention comprises the following steps:

1: a box body; 1C: a bypass flow chamber; 1D: an air flow channel; b: a transmission mechanism; 2: a rocker arm; 3: a spring pad; 4: a shaft sleeve; 5: a piston ring; 6: a valve stem; 61: connecting a ball head; 7: a fixed cylinder; 8: a valve disc; 81: a guide rail; 82: avoiding the notch; 83: an air flow regulating aperture; 9: a limiting member; 10: a flow guide valve seat; 101: an air flow regulating aperture; 102: a guide vane; 11: a three-way catalyst; 110: the air flow dead zone.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1：

An embodiment of the present embodiment provides an exhaust gas outflow control apparatus for a turbocharger, as shown in fig. 3 to 4, including: the device comprises a box body 1, a fixed cylinder 7, a valve disc 8, a flow guide valve seat 10 and a transmission mechanism B.

Specifically, in this embodiment, an airflow channel 1D is formed inside the box body 1, a working air inlet and a bypass air inlet (not shown in the figure) are formed in the side wall of the box body 1 at intervals, the working air inlet and the bypass air inlet are respectively communicated with the airflow channel 1D, an air outlet communicated with the airflow channel 1D is formed in one end of the box body 1, the fixed cylinder 7 is fixed in the airflow channel 1D, one end of the fixed cylinder 7 is communicated with the working air inlet, and the other end of the fixed cylinder is communicated with the air outlet of the airflow channel 1D.

More specifically, in the present embodiment, a bypass chamber 1C is formed between the outer wall surface of the fixed cylinder 7 and the inner wall surface of the casing 1, and one end of the bypass chamber 1C communicates with the bypass intake port and the other end communicates with the outlet port of the airflow path 1D.

More specifically, in this embodiment, the valve disc 8 and the diversion valve seat 10 are both sleeved on the outer wall surface of the fixed cylinder 7 and close to the position of the air outlet of the air flow passage 1D, the valve disc 8 is located on one side of the diversion valve seat 10 away from the air outlet of the air flow passage 1D, the valve disc is rotatable around the axis of the fixed cylinder 7 relative to the fixed cylinder 7, and the diversion valve seat 10 is fixed relative to the fixed cylinder 7.

More specifically, in the present embodiment, the transmission mechanism B is disposed in the housing 1, a power input end of the transmission mechanism B is in transmission connection with an actuator in the turbocharger, a power output end of the transmission mechanism B is in transmission connection with the valve disc 8, and the transmission mechanism is linked with the valve disc 8 to rotate around an axis of the fixed cylinder 7 relative to the fixed cylinder 7.

More specifically, in this embodiment, the valve disc 8 is provided with a plurality of air flow adjusting holes 83 which are arranged at intervals along the circumferential direction of the valve disc 8 and penetrate through the valve disc 8 along the axial direction of the valve disc 8, the flow guide valve seat 10 is provided with a plurality of air flow adjusting holes 101 which are arranged at intervals along the circumferential direction of the flow guide valve seat 10 and penetrate through the flow guide valve seat 10 along the axial direction of the flow guide valve seat 10, the plurality of air flow adjusting holes 83 on the valve disc 8 and the plurality of air flow adjusting holes 101 on the flow guide valve seat 10 are arranged in one-to-one correspondence, the plurality of air flow adjusting holes 83 on the valve disc 8 are communicated with the bypass flow chamber 1C, the plurality of air flow adjusting holes 101 on the flow guide valve seat 10 are communicated with the air outlet, when each air flow adjusting hole 83 on the valve disc 8 is communicated with the air flow adjusting hole 101 on the flow guide valve seat 10, the air flow in the bypass flow chamber 1C can sequentially pass through the air flow adjusting holes 83 on the valve disc 8, the air flow adjusting holes 101 on the flow guide valve seat 10, And (4) discharging from the air outlet.

More specifically, in the present embodiment, during use of the exhaust gas outflow control device, the relative positions of the air flow adjusting holes 83 on the valve disc 8 and the corresponding air flow adjusting holes 101 on the diversion valve seat 10 can be adjusted by rotating the valve disc 8 about the axis of the fixed cylinder 7 relative to the fixed cylinder 7, so as to adjust the area of the diversion valve seat 10 where the air flow adjusting holes 101 are opened.

More specifically, in this embodiment, 10 airflow adjusting holes 83 on the valve disc 8 and 13 airflow adjusting holes 101 on the diversion valve seat 10 may be provided, or 11 airflow adjusting holes may also be provided, which may be specifically set according to actual design and use requirements, and this embodiment is not limited thereto.

More specifically, in the present embodiment, the distances between the air flow adjusting holes 101 on the guide valve seat 10 are equal, and the air flow adjusting holes 83 on the valve disc 8 are distributed in the same manner as the air flow adjusting holes 101 on the guide valve seat 10.

More specifically, in the present embodiment, the structure of the box body 1 is similar to that of a box body in the prior art, and is not described herein again, and the fixed cylinder 7 is a rigid cylindrical structure, which can be specifically set according to the structure of the box body 1, and this embodiment does not limit this. The valve disc 8 and the deflector seat 10 are rigid disc-like structures, and the specific structure of the actuator B is explained below.

More specifically, in the present embodiment, as shown in fig. 5a to 6, the air flow adjusting holes 83 on the valve disc 8 and the air flow adjusting holes 101 on the guide valve seat 10 are uniformly arranged in the circumferential direction and have the same size, and the shapes of the air flow adjusting holes 83 and the air flow adjusting holes 101 may be circular, fan-shaped or other shapes designed according to specific rules.

More specifically, in the present embodiment, as shown in fig. 5b, both the airflow adjustment holes 83 and 101 may be designed as fan-shaped (a part of a circular ring) through holes with passage areas, so that the exhaust gas bypass controllability can be significantly improved, and linear characteristics for controlling the exhaust gas bypass passage areas and the rotation angles of the valve disc 8 can be obtained.

More specifically, in the present embodiment, as shown in fig. 5a, the air flow adjusting hole 83 and the air flow adjusting hole 101 may be designed to be circular, and the coordinates in fig. 6 are shown in percentage, which are the ratio of the actual turning angle to the maximum turning angle (corresponding to the maximum passage area) and the ratio of the actual passage area to the maximum passage area, respectively.

More specifically, fig. 6 shows the parameter comparison between the airflow adjusting holes 83 and the airflow adjusting holes 101 in two shapes, the ordinate is the parameter of the channel area, the abscissa is the rotation angle ratio between the airflow adjusting holes 83 and the airflow adjusting holes 101, the solid line is the parameter curve between the fan-shaped airflow adjusting holes 83 and the airflow adjusting holes 101, the dotted line is the parameter curve between the circular airflow adjusting holes 83 and the airflow adjusting holes 101, the parameter of the rotation angle ratio and the channel area ratio corresponding to the two curves can be known, under the condition of a certain rotation angle ratio, the passage area of the fan-shaped air flow adjusting hole 83 relative to the air flow adjusting hole 101 is obviously larger than that of the circular air flow adjusting hole 83 relative to the air flow adjusting hole 101, therefore, the fan-shaped air flow adjustment holes 83 and the air flow adjustment holes 101 have a better ventilation effect, and in the present embodiment, the air flow adjustment holes 83 are preferably formed in a fan shape with respect to the air flow adjustment holes 101.

More specifically, in this embodiment, since the valve disc 8 in the exhaust gas outflow control device for a turbocharger is provided with a plurality of air flow adjusting holes 83 which are arranged at intervals along the circumferential direction of the valve disc 8 and penetrate through the valve disc 8 along the axial direction of the valve disc 8, the guide valve seat 10 is provided with a plurality of air flow adjusting holes 101 which are arranged at intervals along the circumferential direction of the guide valve seat 10 and penetrate through the guide valve seat 10 along the axial direction of the guide valve seat 10, the plurality of air flow adjusting holes 83 on the valve disc 8 and the plurality of air flow adjusting holes 101 on the guide valve seat 10 are arranged in a one-to-one correspondence, the plurality of air flow adjusting holes 83 of the valve disc 8 are communicated with the bypass flow chamber 1C, the plurality of air flow adjusting holes 101 of the guide valve seat 10 are communicated with the air outlet, when each air flow adjusting hole 83 of the valve disc 8 is communicated with the air flow adjusting hole 101 of the guide valve seat 10, the air flow in the bypass flow chamber 1C can sequentially pass through the air flow adjusting holes 83, the bypass flow adjusting holes 10, And the air flow adjusting hole 101 and the air outlet of the guide valve seat 10 are discharged.

In addition, during the use process, the relative positions of the air flow adjusting holes 83 on the valve disc 8 and the corresponding air flow adjusting holes 101 on the diversion valve seat 10 can be adjusted through the rotation of the valve disc 8 around the axis of the fixed cylinder 7 relative to the fixed cylinder 7, so that the opening area of the air flow adjusting holes 101 on the diversion valve seat 10 can be adjusted. And then can adjust the speed that the waste gas flows out according to turbo charger's demand, increase the air current stability and the homogeneity that waste gas got into low reaches exhaust system like three way catalyst converter 11, promote catalyst converter exhaust gas purification efficiency and working life, improve automobile engine exhaust emission, adapt to increasingly harsher domestic and foreign emission standard to and avoid box 1 because the uneven risk that is heated the fracture of waste gas flow output.

Further, another embodiment of the present embodiment provides an exhaust gas outflow control apparatus for a turbocharger, as shown in fig. 4 and 10, a plurality of guide vanes 102 are disposed at intervals along a circumferential direction of the guide valve seat 10 on a side of the guide valve seat 10 facing away from the valve disc 8, and each guide vane 102 is fixedly connected to a side of a corresponding air flow adjusting hole 101 to guide an air flow flowing out of the corresponding air flow adjusting hole 101.

Specifically, in the present embodiment, when the exhaust gas in the bypass chamber 1C is discharged from the gas flow adjusting hole 101 on the guide valve seat 10, due to the arrangement of the guide vane 102, the exhaust gas will form a spiral gas flow after flowing through the guide vane 102 of the guide valve seat 10, thereby further improving the stability when the exhaust gas flows out of the bypass chamber 1C.

More specifically, in the present embodiment, the number of the guide vanes 102 is equal to the number of the airflow adjusting holes 101 on the guide valve seat 10, the guide vanes 102 are provided with helical vanes, and the helical direction of the helical vanes can be set according to actual conditions, which is not limited in the present embodiment.

Further, another embodiment of the present embodiment provides an exhaust gas outflow control apparatus for a turbocharger, as shown in fig. 7, one end of the fixed cylinder 7 abuts against an inner wall of the tank 1, the other end of the fixed cylinder 7 is fixedly connected with the flow guide valve seat 10 as a whole, and the flow guide valve seat 10 is fixedly connected with the inner wall of the tank 1, so as to axially position the fixed cylinder 7, prevent the fixed cylinder from axially moving, and further prevent the exhaust gas pressure of the bypass flow chamber 1C from pushing the flow guide valve seat 10 to move.

Specifically, in this embodiment, the diversion valve seat 10 and the inner wall of the box body 1 may be fixed in various fixing and detachable fixing manners such as bolts and buckles, the fixing cylinder 7 and the diversion valve seat 10 may be welded into an integral structure, and they may be specifically set according to actual design and use requirements, which is not limited in this embodiment.

Further, another embodiment of the present embodiment provides an exhaust gas outflow control apparatus for a turbocharger, as shown in fig. 3 and 7, in which a fixed cylinder 7 is fixed to a guide valve seat 10 as an integral structure; and the outer wall surface of the fixed cylinder 7 is formed in a stepped structure.

Specifically, in the present embodiment, the fixed cylinder 7 and the guide valve seat 10 are fixed as an integral structure; and the outer wall surface of the fixed cylinder 7 is formed into a stepped structure, with this structure, the exhaust gas outflow control apparatus for a turbocharger in the present embodiment can be made more reliable.

Further, another embodiment of the present invention provides an exhaust gas outflow control apparatus for a turbocharger, as shown in fig. 4, 7, 9, and 10, a limiting member 9 is further disposed on the flow guide valve seat 10, one end of the limiting member 9 is fixedly connected to the flow guide valve seat 10, and the other end of the limiting member 9 is fixedly connected to the inner wall of the box body 1, so as to limit the flow guide valve seat 10 to rotate around the axis of the fixed cylinder 7 relative to the fixed cylinder 7.

Specifically, in this embodiment, the flow guide valve seat 10 is further provided with a limiting member 9, and the limiting member 9 may be configured as a positioning pin, which can limit the flow guide valve seat 10 to rotate around the axis of the fixed cylinder 7 relative to the valve disc 8, so as to further improve the usability of the flow guide valve seat 10.

Further, another embodiment of the present embodiment provides an exhaust gas outflow control apparatus for a turbocharger, as shown in fig. 3 to 10, the diversion valve seat 10 and the valve disc 8 are both provided with a disk-shaped structure, and a convex sealing structure is formed on the periphery of the airflow adjusting hole 101 of the diversion valve seat 10 to seal the joint of the diversion valve seat 10 and the valve disc 8.

Furthermore, an arc-shaped avoiding gap 82 is formed in the edge of the valve disc 8, and the rotation stroke of the valve disc 8 is smaller than or equal to the arc length of the arc-shaped avoiding gap 82, so that the limiting members 9 all penetrate through the arc-shaped avoiding gap 82 in the rotation stroke of the valve disc 8.

Specifically, in this embodiment, a convex sealing structure is formed around the airflow adjusting hole 101 of the diversion valve seat 10 to seal the joint between the diversion valve seat 10 and the inner wall of the box 1, so as to prevent the waste gas from leaking from the inside of the joint between the diversion valve seat 10 and the valve disc 8.

More specifically, in this embodiment, the edge of valve disc 8 is provided with the arc and dodges breach 82, and the arc length of breach 82 is dodged to the rotatory stroke less than or equal to arc of valve disc 8 to make locating part 9 all pass the arc and dodge breach 82 in the rotatory stroke of valve disc 8, the setting of this kind of structure can avoid valve disc 8 to receive the influence of locating part 9 at the rotation in-process, and then can guarantee that valve disc 8 can normally rotate.

More specifically, in this embodiment, the convex sealing structure may be configured to set a convex plane with a certain width (for example, 3mm) around the airflow adjustment hole 101 on the side of the diversion valve seat 10 in working contact with the valve disc 8, so as to reduce the working contact area between the valve disc 8 and the diversion valve seat 10, and achieve the effects of reducing friction and improving sealing.

Further, another embodiment of the present embodiment provides an exhaust gas outflow control apparatus for a turbocharger, as shown in fig. 4, the transmission mechanism B includes a rocker arm 2 and a valve rod 6, the rocker arm 2 is fixedly connected to one end of the valve rod 6, and the other end of the valve rod 6 is in transmission connection with the valve disc 8.

Further, another embodiment of this embodiment provides an exhaust gas outflow control device for a turbocharger, and the transmission mechanism B further includes a shaft sleeve 4, one end of the shaft sleeve 4 is fixedly connected to the shaft hole on the box body 1, the valve rod 6 is inserted in the shaft sleeve 4 and is in clearance fit with the shaft sleeve 4, and the other end of the shaft sleeve 4 extends to the position where the rocker arm 2 is located.

Furthermore, a spring pad 3 is arranged between the shaft sleeve 4 and the rocker arm 2, the spring pad 3 is sleeved on the valve rod 6, and a piston ring 5 is arranged between the shaft sleeve 4 and the valve rod 6 so as to seal the joint of the shaft sleeve 4 and the valve rod 6.

Specifically, in the present embodiment, the piston ring 5 is used to prevent high-pressure exhaust gas from leaking from the inside of the turbine housing through the gap between the bushing 4 and the valve rod 6, and the spring pad 3 is disposed between the bushing 4 and the rocker arm 2 to limit the axial degree of freedom of the valve rod 6 therebetween, thereby reducing vibration noise caused by axial play of the valve rod 6, and simultaneously facilitating further improvement of the exhaust gas sealing performance between the valve rod 6 and the bushing 4.

Further, another embodiment of the present embodiment provides an exhaust gas outflow control apparatus for a turbocharger, as shown in fig. 4 and 8, a guide rail 81 is provided on a side of the valve disc 8 facing away from the diversion valve seat 10, an inner wall surface of the guide rail 81 is provided with a cambered surface structure, the other end of the valve rod 6 is provided with a connecting ball 61, and the connecting ball 61 is slidably connected with the guide rail 81.

Further, the valve rod 6 is linked with the connecting ball 61 to rotate about the axis of the valve rod 6, so that the connecting ball 61 pushes the valve disk 8 to rotate about the axis of the fixed cylinder 7 relative to the fixed cylinder 7 while the connecting ball 61 slides along the inner wall of the guide rail 81 facing away from the valve disk 8.

Specifically, in this embodiment, one side of the valve disc 8 departing from the guide valve seat 10 is provided with a guide rail 81, the inner wall surface of the guide rail 81 is provided with a cambered surface structure, the other end of the valve rod 6 is provided with a connection ball 61, the connection ball 61 is connected with the guide rail 81 in a sliding manner, the arrangement of the structure can enable the exhaust gas outflow control device for the turbocharger to be in a use process, the valve rod 6 is linked with the connection ball 61 to rotate around the axis of the valve rod 6, the connection ball 61 is enabled to push the valve disc 8 to rotate around the axis of the fixing cylinder 7 relative to the fixing cylinder 7, and meanwhile, the connection ball 61 slides towards the direction far away from the valve disc 8 along the inner wall surface of the guide rail 81, so as to avoid the connection ball 61 from being blocked with the guide rail 81 when pushing the valve disc 8 to rotate around the axis of the fixing cylinder 7 relative to the fixing cylinder 7.

In the use process of the exhaust gas outflow control device for the turbocharger, the rocker arm 2 is connected through the actuator and driven to rotate, and the exhaust gas flowing into the bypass flow chamber 1C is directly discharged through the valve disc 8 and the air flow adjusting hole 101 on the guide valve seat 10 without passing through a working flow passage. Besides, a guide vane 102 is arranged beside the air flow adjusting hole 101 on the guide valve seat 10, after the exhaust gas flows through the guide vane 102 of the guide valve seat 10, a spiral air flow is formed, the spiral strength can be adjusted by the number of vanes and the rotation angle of the vanes, and the spiral direction can be the same as or opposite to the rotation direction of the turbine. The specific configuration may be set according to actual design and use requirements, which is not limited in this embodiment.

Further, since the inlet end of the three-way catalyst 11 is formed in a cone shape, it will produce a different effect on whether the flow is spiraled after the exhaust gas discharged from the turbocharger flows in. As shown in fig. 11, the flow field of the non-spiral air flow is the right half of the diagram, and there is an air flow dead zone 110 at the transition of the catalytic package size cylinder, so that the air flow cannot flow in with a uniform distribution, and the exhaust gas flow distribution at the working position of the catalytic package carrier is not uniform. The left half of the figure shows that after the helical flow of the present invention is introduced, the dead space 110 will disappear and the uniformity of the incoming exhaust gas flow is improved, in short, the rotating flow in the bypass flow chamber 1C will flow toward the wall of the cylinder under the centrifugal force, resulting in the reduction or disappearance of the dead space 110.

More specifically, the exhaust gas outflow control device for a turbocharger provided in this embodiment may be used for turbochargers of different models, and a specific usage scenario thereof may be set according to actual design and usage requirements, which is not limited in this embodiment.

Example 2：

The present embodiment provides a turbocharger including the exhaust gas outflow control apparatus for a turbocharger of embodiment 1.

Specifically, the turbocharger in this embodiment includes the exhaust gas outflow control device of the above-described structure, as shown in fig. 3 to 10 in embodiment 1, and the valve disc 8 in the exhaust gas outflow control device is provided with a plurality of air flow adjusting holes 83 which are arranged at intervals in the circumferential direction of the valve disc 8 and penetrate through the valve disc 8 in the axial direction of the valve disc 8, the guide valve seat 10 is provided with a plurality of air flow adjusting holes 101 which are arranged at intervals in the circumferential direction of the guide valve seat 10 and penetrate through the guide valve seat 10 in the axial direction of the guide valve seat 10, the plurality of air flow adjusting holes 83 on the valve disc 8 and the plurality of air flow adjusting holes 101 on the guide valve seat 10 are arranged in one-to-one correspondence, the plurality of air flow adjusting holes 83 of the valve disc 8 communicate with the bypass flow chamber 1C, the plurality of air flow adjusting holes 101 on the guide valve seat 10 communicate with the air outlet, when each air flow adjusting hole 83 of the valve disc 8 communicates with the corresponding air flow adjusting hole 101 on the guide valve seat 10, the air flow in the bypass flow chamber 1C can sequentially pass through the air flow adjusting hole 83 of the valve disc 8, the air flow adjusting hole 101 of the guide valve seat 10 and the air outlet to be discharged.

More specifically, during the use process, the relative positions of the air flow adjusting holes 83 on the valve disc 8 and the corresponding air flow adjusting holes 101 on the diversion valve seat 10 can be adjusted through the rotation of the valve disc 8 around the axis of the fixed cylinder 7 relative to the fixed cylinder 7, so as to adjust the opening area of the air flow adjusting holes 101 on the diversion valve seat 10. And then can adjust the speed that the waste gas flows out according to turbo charger's demand, and then increase the air current stability and the homogeneity that waste gas got into low reaches exhaust system like three way catalyst converter 11, promote catalyst converter exhaust gas purification efficiency and working life, improve automobile engine exhaust emission, adapt to increasingly harsher domestic and foreign emission standard to and avoid box 1 because the uneven risk that is heated the fracture of waste gas flow output.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.