WO2016023315A1

WO2016023315A1 - Supercharger and automobile

Info

Publication number: WO2016023315A1
Application number: PCT/CN2014/093908
Authority: WO
Inventors: 侯亦波; 李龙超; 杜鹏; 滕建耐; 张增光; 冯玮玮; 许涛; 王锦艳; 张良超; 阮仁宇; 张辰; 杨冰; 朱东升
Original assignee: 安徽江淮汽车股份有限公司
Priority date: 2014-08-13
Filing date: 2014-12-16
Publication date: 2016-02-18
Also published as: CN203978601U

Abstract

A supercharger, comprising a volute (21), a bushing (23) fixed on the volute (21) and a crank (24) fitted in the bushing (23). A fit clearance is provided between the bushing (23) and the crank (24). The inner surface of the volute (21) is provided with a waste gas guide portion (211) protruding relative to the inner surface of the volute (21). The top end of the waste gas guide portion (211) is higher than the end of the fit clearance close to the inner surface of the volute (21) in the flowing direction of waste gas, and the waste gas guide portion (211) is positioned on the upstream of the flowing direction of waste gas. By means of the supercharger, the crank is unlikely to be blocked in rotation, and reliability of a waste gas bypass valve connected to the crank is improved when the waste gas bypass valve moves.

Description

Supercharger and car

Technical field

The utility model relates to the technical field of a supercharging device, in particular to a supercharger. The utility model also relates to a motor vehicle.

Background technique

In order to achieve engine miniaturization, high power and low fuel consumption, the application of supercharging technology on the engine is becoming more and more common, in order to improve the engine's acceleration response and engine emissions at low speed, without sacrificing the engine at high speed and high load. Under the condition of the durability of the supercharger, the supercharger is generally controlled by a wastegate valve.

As shown in FIG. 1, the turbocharger currently widely used includes a scroll 11, an actuator 12, a push rod 13, a bush 14, a crank 15, and a wastegate valve 16, and the scroll 11 has an intake port and an exhaust port. The mouth and the bypass air outlet, the air inlet and the exhaust port communicate with the exhaust passage, the exhaust passage and the bypass air outlet communicate with the bypass air passage, and the waste bypass valve 16 is disposed on the bypass air passage to control Connect and close the bypass airway. Specifically, the actuator 12 is fixed to the push rod 13, one end of the push rod 13 is rotatably coupled to the crank 15, and the crank 15 is fitted in the bushing 14, and the crank 15 is fixed to the wastegate valve 16. When the supercharger is working, when the bypass air passage needs to be connected or closed, the actuator 12 can drive the push rod 13 to move, thereby driving the crank 15 to rotate in the bushing 14, and the waste gas bypass valve 16 can rotate in the bypass air passage. In this way, the communication or closing of the bypass air passage is achieved.

The crank 15 and the bushing 14 are generally assembled in a clearance fit, and a portion of the exhaust gas in the scroll 11 passes through a gap between the crank 15 and the bushing 14, which will wash the surfaces of the crank 15 and the bushing 14. Due to the high temperature of the exhaust gas, the surface of the crank 15 and the bushing 14 will be oxidized and eroded. As the thickness of the corroded layer increases, the gap between the crank 15 and the bushing 14 is continuously reduced, eventually resulting in the crank 15 being opposed to The movement of the bushing 14 will be stuck. Obviously, when the crank 15 is stuck during the movement of the crank 15, the reliability of the movement of the wastegate valve 16 is lowered.

In summary, how to solve the problem of low reliability when the wastegate valve is moved has become a technical problem to be solved by those skilled in the art.

Utility model content

It is an object of the present invention to provide a supercharger that is capable of improving the reliability of a wastegate bypass valve. Another object of the present invention is to provide an automobile including the above-described supercharger.

In order to achieve the above object, the present invention provides the following technical solutions:

A supercharger includes a scroll, a bush fixed to the scroll, and a crank fitted in the bush, the bush having a matching clearance with the crank, the scroll The inner surface has an exhaust gas guiding portion, and the exhaust gas guiding portion is protruded with respect to an inner surface of the volute, and a tip end of the exhaust gas guiding portion is higher than a close proximity of the fitting gap along a flow direction of the exhaust gas One end of the inner surface of the volute, and the exhaust gas guiding portion is located upstream of the flow direction of the exhaust gas.

Preferably, in the supercharger, a surface of the exhaust gas guiding portion facing the inflow side of the exhaust gas is a guiding surface, and the guiding surface is downstream of the exhaust gas inflow direction with respect to a normal direction of the exhaust gas inflow direction tilt.

Preferably, in the supercharger, a side of the exhaust gas guiding portion facing the fitting gap is a curved surface, and an end of the curved surface adjacent to the bushing has a guiding arc surface. The flow guiding direction of the guiding flow surface is away from the matching gap.

Preferably, in the above-described supercharger, one end of the bushing located in the scroll has a flow guiding plane, the guiding plane is located on an outer surface of the bushing, and the fitting gap is located at The far side of the direction in which the flow guiding plane extends.

Preferably, in the above-described supercharger, a surface of the bushing that cooperates with the volute is an outer side surface, the outer side surface includes a first face and a second face connected to the first face, The second surface is adjacent to an inner side of the volute, and a deformation gap is formed between the second surface and the volute.

Preferably, in the supercharger, the second surface is a flat surface.

A vehicle comprising a supercharger, the supercharger being the supercharger of any of the above.

In the above technical solution, the supercharger provided by the utility model comprises a volute, a bush fixed on the volute and a crank sleeved in the bushing, and a matching gap between the bush and the crank, the inner surface of the volute Having an exhaust gas guiding portion, the exhaust gas guiding portion is protruded from the inner surface of the volute, and along the flow direction of the exhaust gas, the top end of the exhaust gas guiding portion is higher than an end of the matching gap near the inner surface of the volute, and the exhaust gas The flow guiding portion is located upstream of the flow direction of the exhaust gas. When the exhaust gas in the volute flows into the matching gap between the bush and the crank, a part of the exhaust gas will interact with the exhaust gas guiding portion, and the exhaust gas guiding portion can block the exhaust gas from flowing further between the bushing and the crank. Within the fit gap, Further, the amount of exhaust gas entering the above-mentioned fitting gap is reduced. Obviously, compared with the content described in the background art, the supercharger provided by the utility model reduces the corrosion of the bushing and the crank by the exhaust gas in the volute, so that the crankshaft is not prone to sticking when the crank rotates, thereby improving Reliability of the wastegate valve connected to the crank when moving.

Since the above supercharger has the above technical effects, the automobile including the supercharger should also have a corresponding technical effect.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only in the present invention. Some of the embodiments described may also be used to obtain other figures from those of ordinary skill in the art in view of these drawings.

Figure 1 is a schematic structural view of a conventional supercharger;

2 is a partial structural schematic view of a supercharger according to an embodiment of the present invention;

3 is a partial enlarged view of a supercharger provided by an embodiment of the present invention;

4 is a schematic structural view of a bushing provided by an embodiment of the present invention.

Description of the reference signs:

11-volute, 12-actuator, 13-push, 14-bush, 15- crank, 16-exhaust bypass valve;

21-volute, 211-exhaust diversion, 22-push, 23-bush, 24- crank, 25-exhaust bypass valve.

detailed description

The core of the present invention is to provide a supercharger that can improve the reliability of the exhaust bypass valve when moving. Another core of the present invention is to provide an automobile including the above-described supercharger.

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 2-4, the embodiment of the present invention provides a supercharger including a volute 21, an actuator, a push rod 22, a bushing 23, a crank 24, and a wastegate valve 25, on the volute 21 The utility model has an air inlet, an exhaust port and a bypass air outlet, the exhaust passage is communicated between the air inlet and the exhaust port, and the bypass air passage is connected between the exhaust passage and the bypass air outlet, and the waste bypass valve 25 is disposed at The bypass air passage is used to control the communication and closing of the bypass air passage. The actuator is fixed to the push rod 22, and one end of the push rod 22 is rotated with the crank 24. Then, the crank 24 is set in the bushing 23 with a matching gap therebetween, and the bushing 23 is fixed to the scroll 21, and the crank 24 is fixed to the wastegate valve 25. When the supercharger is working, when it is necessary to connect or close the bypass air passage, the actuator can drive the push rod 22 to move, thereby driving the crank 24 to rotate in the bushing 23, and the waste gas bypass valve 25 can be rotated in the bypass air passage to This enables the bypass or bypass of the airway.

One of the improvements of the present invention is that the inner surface of the volute 21 has an exhaust gas guiding portion 211 protruding from the inner surface of the volute 21 along the flow direction of the exhaust gas, and the exhaust gas guiding portion The top end of the 211 is higher than the end of the fitting gap near the inner surface of the volute 21, and the exhaust gas guiding portion 211 is located upstream of the flow direction of the exhaust gas, where the flow direction of the exhaust gas refers to the flow guiding portion 211 when flowing. The flow direction of the contacted exhaust gas, for example, the exhaust gas flowing along the inner surface of the volute 21.

When the exhaust gas in the volute 21 flows into the fitting gap between the bushing 23 and the crank 24, a part of the exhaust gas will interact with the exhaust gas guiding portion 211, which can block the exhaust gas from flowing further to the lining. The fit gap between the sleeve 23 and the crank 24 reduces the amount of exhaust gas entering the mating gap. It is apparent that the supercharger provided by the embodiment of the present invention slows the corrosion of the bushing 23 and the crank 24 by the exhaust gas in the scroll 21, so that the crank 24 does not easily occur when compared with the contents described in the background art. The stuck phenomenon further increases the reliability of the waste bypass valve 25 connected to the crank 24.

Specifically, the surface of the exhaust gas guiding portion 211 that is in contact with the exhaust gas may extend along the normal direction of the exhaust gas guiding portion 211. However, in this manner, a relatively large collision occurs between the exhaust gas and the exhaust gas guiding portion 211. The exhaust gas guiding portion 211 is caused to receive a relatively large impact force. In order to reduce the impact force of the exhaust gas guiding portion 211, thereby extending the life of the exhaust gas guiding portion 211, the surface of the exhaust gas guiding portion 211 provided on the exhaust gas inflow portion 211 provided by the embodiment of the present invention is a guiding surface. The surface is inclined to the downstream of the exhaust gas inflow direction with respect to the normal direction of the exhaust gas inflow direction. It can be seen that after the exhaust gas contacts the guiding surface, the collision force between the two is decomposed in different directions by the guiding surface, and then the impact force received by the exhaust gas guiding portion 211 is reduced.

The surface of the exhaust gas guiding portion 211 facing the side of the matching gap may be of any configuration, but in actual operation, a part of the exhaust gas directly acts on the surface of the exhaust gas guiding portion 211 facing the side of the matching gap. Further, it enters the above-mentioned matching gap. To this end, the utility model In the embodiment, the surface of the exhaust gas guiding portion 211 facing the side of the matching gap is arranged as an arc surface, and the end of the curved surface near the bushing 23 has a guiding arc surface, and the guiding direction of the guiding arc surface Keep away from the matching gap between the bushing 23 and the crank 24. According to this, the exhaust gas acting on the surface of the exhaust gas guiding portion 211 facing the side of the fitting gap flows toward the side far from the fitting gap by the flow guiding surface, thereby further reducing the inflow. Match the amount of exhaust gas in the gap.

Further, one end of the bushing 23 located in the volute 21 has a flow guiding plane which is located on the outer surface of the bushing 23, and the matching gap between the bushing 23 and the crank 24 is located at the guiding plane. The far side of the extending direction refers to the side of the exhaust gas away from the aforementioned matching gap. The flow guiding plane can also block part of the exhaust gas from flowing into the matching gap between the bushing 23 and the crank 24. Especially when the exhaust gas guiding portion 211 has the above-mentioned guiding curved surface, the guiding plane can be along the guiding curved surface. The direction of the flow direction is in contact with the flow guiding arc, so that the exhaust gas is more reliably guided away from the position of the aforementioned matching gap, thereby preventing the occurrence of sticking when the crank 24 is rotated to a greater extent.

It can be understood that the bushing 23 is easily deformed in a high temperature environment, especially at a position in contact with the volute 2, and when the bushing 23 is deformed, the fitting gap between the bushing 23 and the crank 24 is easily reduced. Also, there is a case where the crank 24 is stuck when it is rotated. The surface of the bushing 23 that cooperates with the volute 21 is defined as an outer side surface. To solve the above problem, the outer side surface includes a first surface and a second surface connected to the first surface, and the second surface is adjacent to the inner side of the volute 21, And the distance between the second face and the axis of the bushing 23 is smaller than the distance between the first face and the axis of the bushing 23, that is, the outer diameter of the first face is larger than the outer diameter of the second face, so that the second face and the vortex There is a deformation gap between the shells 21. Specifically, the second surface may be a curved surface or a flat surface. In order to facilitate processing and provide a uniform deformation space, the second embodiment of the present invention sets the second surface as a plane.

With the previous technical solution, even if the bushing 23 is deformed, the deformation gap between the bushing 23 and the volute 21 can extend the deformation of the bushing 23 to the direction close to the volute 21, thereby preventing the bushing 23 from being deformed. To the crank 24, the fit clearance between the bushing 23 and the crank 24 is thereby more easily maintained.

The automobile provided by the embodiment of the present invention includes a supercharger, which is a supercharger described in any of the above technical solutions. Since the above supercharger has the above technical effects, the automobile including the supercharger should also have corresponding technical effects, and details are not described herein again.

The above description of certain exemplary embodiments of the present invention has been described by way of illustration only The described embodiments may be modified in various different ways, without departing from the spirit and scope of the invention. The above drawings and description are to be considered in all respects as illustrative

Claims

A supercharger includes a scroll (21), a bushing (23) fixed to the scroll (21), and a crank (24) fitted in the bush (23), the bush (23) having a matching gap with the crank (24), characterized in that the inner surface of the scroll (21) has an exhaust gas guiding portion (211), and the exhaust gas guiding portion (211) is opposite Protruding on an inner surface of the volute (21), the top end of the exhaust gas guiding portion (211) is higher than the inner surface of the volute (21) on the fitting gap along the flow direction of the exhaust gas. One end, and the exhaust gas guiding portion (211) is located upstream of the flow direction of the exhaust gas.
The supercharger according to claim 1, wherein a surface of the exhaust gas guiding portion (211) facing the inflow side of the exhaust gas is a guiding surface, and the guiding surface is normal with respect to the inflow direction of the exhaust gas. It is inclined to the downstream of the inflow direction of the exhaust gas.
The supercharger according to claim 1, wherein a side of the exhaust gas guiding portion (211) facing the fitting gap is an arcuate surface, and the curved surface is adjacent to the bushing ( One end of 23) has a guiding arc surface, and the guiding direction of the guiding arc surface is away from the fitting gap.
A supercharger according to claim 1, wherein one end of said bushing (23) located in said scroll (21) has a flow guiding plane, said flow guiding plane being located in said bushing ( 23) on the outer surface, and the fitting gap is located on a far side of the extending direction of the flow guiding plane.
The supercharger according to any one of claims 1 to 4, characterized in that the surface of the bushing (23) that cooperates with the volute (21) is an outer side surface, and the outer side surface includes a One side and a second side connected to the first surface, the second surface is adjacent to an inner side of the volute (21), and a deformation gap is formed between the second surface and the volute (21) .
The supercharger of claim 5 wherein said second face is planar.
A vehicle, including a supercharger, characterized in that the supercharger is the supercharger according to any one of claims 1-6.