Bypass valve mechanism and turbocharger

Abstract

The utility model belongs to the technical field of turbochargers, and discloses a bypass valve mechanism and a turbocharger. The turbocharger comprises a volute and a bypass valve mechanism, a volute chamber and a bypass pipeline are arranged in the volute, a bypass valve port is located in the volute chamber, one end of the bypass pipeline is communicated with the bypass valve port, the other end of the bypass pipeline can be communicated with an engine, and the bypass valve mechanism is arranged in the volute and comprises a rocker arm and a valve deck assembly. The first end of the rocker arm is rotationally connected with the inner wall of the volute, the valve deck assembly comprises a valve deck body, the valve deck body is arranged at the second end of the rocker arm, the side, facing the bypass valve port, of the valve deck body is constructed to be an arc-shaped face, a sinking groove matched with the arc-shaped face is formed in the bypass valve port, and the arc-shaped face can abut against or be separated from the bottom wall of the sinking groove. According to the bypass valve mechanism, abnormal sound generated when the valve cover body is opened and closed is reduced, the supercharging effect of the turbocharger adopting the bypass valve mechanism can be adjusted, and stable operation of an engine is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to turbocharger technical field especially by-pass valve mechanism and turbocharger. BACKGROUND

[0002] In recent years, turbocharging technology is more and more widely used in various purposes of engine, in order to ensure the stable operation of turbocharger and effectively control the pressure, the volute of supercharger is equipped with by-pass valve port, the by-pass valve port can discharge excess exhaust gas, and the speed of turbocharger and the pressure in the turbine shell are accurately controlled, therefore, the by-pass valve mechanism for controlling the opening and closing of by-pass valve port is more and more important.

[0003] At present, the by-pass valve mechanism includes valve cover and rocker arm, the valve cover can open or close the by-pass valve port, the rocker arm is connected with the valve cover, and the rocker arm can rotate with the valve cover relative to the volute. In the opening and closing process of the by-pass valve mechanism, there is a gap between the rocker arm and the valve cover, and there is also a gap between the valve cover and the by-pass valve port. These gaps will cause impact when the by-pass valve mechanism is opened and closed, and then cause abnormal sound problem. The abnormal sound not only affects the user's experience, but also the stability and reliability of the by-pass valve mechanism are insufficient, and long-term use may affect the performance and service life of the turbocharger.

[0004] Therefore, the by-pass valve mechanism and turbocharger are needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of by-pass valve mechanism, which can reduce the abnormal sound generated in use process, and improve the stability and reliability of by-pass valve mechanism.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The by-pass valve mechanism is arranged in the volute, and the volute is provided with a by-pass valve port, comprising:

[0008] The rocker arm is rotatably connected to the inner wall of the volute at the first end thereof;

[0009] The valve cover assembly includes a valve cover body arranged at the second end of the rocker arm, and the side of the valve cover body facing the by-pass valve port is constructed as an arc surface. The by-pass valve port is provided with a groove matched with the arc surface, and the arc surface can abut or separate from the bottom wall of the groove.

[0010] As an optional solution, the valve cover assembly further includes a connecting shaft, the first end of the connecting shaft is connected with the valve cover body, and the second end of the connecting shaft is connected with the rocker arm.

[0011] As an optional solution, the valve cover assembly further comprises a pressing member, the rocker arm comprises a rocker arm body and a rotating arm, the rocker arm body is provided with a through hole, the second end of the connecting shaft passes through the through hole and is connected with the pressing member, one end of the rotating arm is connected with the rocker arm body, and the other end is rotationally connected with the scroll.

[0012] As an optional solution, the second end of the connecting shaft is connected with the pressing member through riveting or welding.

[0013] As an optional solution, the bypass valve mechanism further comprises a gasket, and the gasket is clamped between the pressing member and the rocker arm.

[0014] As an optional solution, the gasket is an elastic gasket.

[0015] As an optional solution, the gasket is a bowl-shaped gasket, and the bowl-shaped gasket comprises an abutting portion, an elastic arm and a supporting portion, the abutting portion abuts against the upper surface of the rocker arm body, one end of the elastic arm is connected with the abutting portion, the other end of the elastic arm is connected with the supporting portion, and the supporting portion abuts against the lower surface of the pressing member.

[0016] As an optional solution, the supporting portion comprises a plurality of supporting pieces, and the plurality of supporting pieces are arranged around the circumferential direction of the abutting portion with the center axis of the abutting portion as the center.

[0017] Another purpose of the utility model is to provide a turbocharger, by adopting the bypass valve mechanism, the turbocharging effect of the turbocharger can be adjusted, and stable operation of the engine is ensured.

[0018] To achieve the purpose, the utility model adopts the following technical scheme:

[0019] The utility model discloses a turbocharger, which comprises a scroll and the bypass valve mechanism, the scroll is internally provided with a scroll chamber and a bypass pipeline, the bypass valve port is located in the scroll chamber, one end of the bypass pipeline is communicated with the bypass valve port, and the other end can be communicated with an engine.

[0020] As an optional solution, the turbocharger further comprises a compressor, and the scroll is further provided with a compressed gas passage, one end of the compressed gas passage is connected with the compressor, and the other end is communicated with the scroll chamber.

[0021] Beneficial effects:

[0022] In the initial state of operation, the arc-shaped surface of the valve cover body of the valve cover assembly fits against the groove on the inner wall of the bypass valve port. The tight fit between the arc-shaped surface and the groove ensures good sealing performance, and the valve cover body blocks the bypass valve port. When the pressure in the bypass pipeline does not exceed the preset value, this blocking state remains unchanged. However, when the pressure in the bypass pipeline exceeds the preset value, the pressure pushes the valve cover body to open, the rocker arm rotates relative to the volute, and the arc-shaped surface moves away from the groove, accurately controlling the gas flow rate, reducing abnormal noise generated when the valve cover body opens and closes, and improving the stability and reliability of the bypass valve mechanism.

[0023] The turbocharger of this invention employs the aforementioned bypass valve mechanism. During turbocharger operation, exhaust gas from the engine enters a bypass pipe within the turbine housing. Initially, the valve cover of the bypass valve mechanism seals the bypass valve port. When the exhaust gas pressure in the bypass pipe exceeds a preset value, the valve cover opens, the rocker arm rotates, and some exhaust gas is discharged from the bypass valve port. This reduces abnormal noise generated during the opening and closing of the valve cover, regulates the turbocharger's boost effect, extends the turbocharger's service life, and ensures stable engine operation. Attached Figure Description

[0024] Figure 1 This is a first schematic diagram of a turbocharger provided in an embodiment of the present invention;

[0025] Figure 2 This is a first-view cross-sectional view of the turbocharger provided in this embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of the turbocharger provided in an embodiment of the present invention from a second perspective;

[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 This is a first schematic diagram of the bypass valve mechanism provided by this utility model;

[0029] Figure 6 This is a second schematic diagram of the bypass valve mechanism provided by this utility model;

[0030] Figure 7 yes Figure 6 Sectional view at point BB.

[0031] In the picture:

[0032] 1. Rocker arm; 11. Rocker arm body; 111. Through hole; 12. Rotating arm;

[0033] 2. Valve cover assembly; 21. Valve cover body; 211. Arc-shaped surface; 22. Connecting shaft; 23. Pressing element; 24. Connecting element;

[0034] 3. Gasket; 31. Support; 311. Support plate;

[0035] 4. Volute housing; 41. Bypass valve port; 411. Settling tank; 42. Bypass pipe; 43. Volute housing chamber; 44. Compressed gas passage. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] This embodiment provides a bypass valve mechanism and a turbocharger, such as Figures 1-3As shown, the turbocharger includes a volute housing 4 and a bypass valve mechanism. The volute housing 4 contains a volute chamber 43 and a bypass pipe 42. A bypass valve port 41 is located within the volute chamber 43. One end of the bypass pipe 42 is connected to the bypass valve port 41, and the other end is connected to the engine. Through the bypass valve port 41 and the bypass pipe 42, the flow rate and pressure of the gas entering the engine can be flexibly adjusted. When the exhaust gas from the engine increases, the turbocharger's operating state can be adjusted in a timely manner, effectively preventing overpressure problems in the turbocharger, ensuring efficient and stable engine operation, and improving the overall performance and reliability of the engine.

[0041] like Figures 1-3 As shown, the bypass valve mechanism is disposed inside the volute 4. The bypass valve mechanism includes a rocker arm 1 and a valve cover assembly 2. The first end of the rocker arm 1 is rotatably connected to the inner wall of the volute 4. The valve cover assembly 2 includes a valve cover body 21, which is disposed at the second end of the rocker arm 1. The side of the valve cover body 21 facing the bypass valve port 41 is constructed as an arc-shaped surface 211. A groove 411 that cooperates with the arc-shaped surface 211 is provided at the bypass valve port 41. The arc-shaped surface 211 can abut or separate from the bottom wall of the groove 411.

[0042] In this embodiment, when the bypass valve mechanism is in operation, in the initial state, the arc-shaped surface 211 of the valve cover body 21 of the valve cover assembly 2 is in contact with the groove 411 on the inner wall of the bypass valve port 41. The tight contact between the arc-shaped surface 211 and the groove 411 ensures good sealing performance. The valve cover body 21 blocks the bypass valve port 41. When the pressure in the bypass pipeline 42 does not exceed the preset value, this blocking state remains unchanged. When the pressure in the bypass pipeline 42 exceeds the preset value, the pressure pushes the valve cover body 21 to open, the rocker arm 1 rotates relative to the volute 4, and the arc-shaped surface 211 moves away from the groove 411, accurately controlling the gas flow rate, reducing the abnormal noise generated when the valve cover body 21 opens and closes, and improving the stability and reliability of the bypass valve mechanism.

[0043] In this embodiment, the turbocharger employs the aforementioned bypass valve mechanism. When the turbocharger is operating, the exhaust gas from the engine enters the bypass pipe 42 within the turbine housing 4. Initially, the valve cover body 21 of the bypass valve mechanism blocks the bypass valve port 41. When the exhaust gas pressure in the bypass pipe 42 exceeds a preset value, the valve cover body 21 opens, the rocker arm 1 rotates, and some exhaust gas is discharged from the bypass valve port 41. This reduces abnormal noise generated during the opening and closing of the valve cover body 21, adjusts the turbocharger's boost effect, extends the turbocharger's service life, and ensures stable engine operation.

[0044] In this embodiment, the preset pressure value is set to 200 mbar. When the equipment is running, once the pressure reaches 200 mbar, the arc-shaped surface 211 of the valve cover body 21 separates from the groove 411 of the bypass valve port 41, opening the bypass valve port 41 and allowing exhaust gas to pass through the bypass pipe 42. This stabilizes the internal pressure of the engine, ensuring a stable engine working cycle. A stable pressure environment also helps optimize fuel combustion efficiency, reduce fuel waste, improve engine power output, reduce fuel consumption, extend the service life of key engine components, and ensure stable, efficient, and low-consumption engine operation. In other embodiments, the preset pressure value can be 140 mbar, 160 mbar, 180 mbar, 220 mbar, 240 mbar, etc., and is not specifically limited here.

[0045] like Figures 1-3 As shown, the turbocharger also includes a compressor (not shown). A compressed gas passage 44 is also provided inside the turbine housing 4. One end of the compressed gas passage 44 is connected to the compressor, and the other end is connected to the turbine housing 43. After the compressor compresses the gas, it is sent into the turbine housing 43 through the compressed gas passage 44. The compressed gas in the turbine housing 43 can enter the engine through the bypass pipe 42. This greatly increases the oxygen content of the air entering the engine, making the combustion process more complete and efficient, effectively enhancing engine power output and reducing fuel consumption.

[0046] like Figures 3-4 As shown, the valve cover assembly 2 also includes a connecting shaft 22. The first end of the connecting shaft 22 is connected to the valve cover body 21, and the second end is connected to the rocker arm 1. When the internal pressure of the bypass pipe 42 reaches a preset pressure, the exhaust gas in the bypass pipe 42 pushes the valve cover body 21 open, thereby causing the rocker arm 1 to rotate. This prevents excessive exhaust gas from causing excessively high engine pressure, maintaining normal intake and exhaust circulation, ensuring efficient combustion within the engine, and stable exhaust emissions. This helps optimize engine operating conditions, reduce the probability of engine failure, extend engine life, and achieve efficient and stable operation.

[0047] like Figures 4-6 As shown, the valve cover assembly 2 also includes a pressing member 23. The rocker arm 1 includes a rocker arm body 11 and a rotating arm 12. The rocker arm body 11 has a through hole 111. The second end of the connecting shaft 22 passes through the through hole 111 and is connected to the pressing member 23. One end of the rotating arm 12 is connected to the rocker arm body 11, and the other end is rotatably connected to the volute 4. This ensures that the valve cover body 21 drives the rocker arm 1 stably and reliably through the connecting shaft 22. The pressing member 23 effectively prevents the connecting shaft 22 from loosening, ensuring smooth force transmission and allowing the rocker arm 1 to rotate flexibly. This allows the valve cover body 21 to fit tightly with the bypass valve port 41, achieving efficient and stable operation of the bypass valve mechanism, optimizing gas flow control, and ensuring stable equipment operation.

[0048] Figures 4-6 As shown, the valve cover assembly 2 also includes a connector 24, and the second end of the connecting shaft 22 is riveted or welded to the pressing member 23 via the connector 24. This stable connection effectively prevents the connection from loosening due to external forces such as vibration and impact, allowing the rocker arm 1 to accurately receive the action commands transmitted by the valve cover body 21 through the connecting shaft 22, thereby precisely controlling the opening and closing of the bypass valve port 41, improving the stability and reliability of the bypass valve mechanism, ensuring stable equipment operation, and reducing maintenance costs.

[0049] In some embodiments, the connector 24 can be a screw, which passes through the connecting shaft 22, and the bottom wall of the screw nut abuts against the pressing member 23. This facilitates installation, disassembly, and maintenance, allowing for easy inspection and replacement of components when needed. In other embodiments, the connector 24 can be a metal block, which is melted at high temperature and welded to the connecting shaft 22. The side wall of the metal block abuts against the pressing member 23. This welded connection provides strong stability and can withstand significant external forces and vibrations, ensuring a stable connection between the connecting shaft 22 and the pressing member 23 under complex operating conditions, thus improving the structural reliability of the bypass valve mechanism.

[0050] Figures 4-7 As shown, the bypass valve mechanism also includes a gasket 3, which is sandwiched between the pressure member 23 and the rocker arm 1. The gasket 3 can effectively buffer the force between the pressure member 23 and the rocker arm 1, avoid direct contact between the two and cause wear, and extend the service life of the components. During equipment operation, the gasket 3 can also reduce the loosening of the connection caused by vibration and impact, so as to ensure a stable connection between the connecting shaft 22 and the pressure member 23 and the rocker arm 1, and ensure stable and reliable opening and closing control of the bypass valve port 41.

[0051] In this embodiment, the gasket 3 is an elastic gasket. The elastic gasket 3 possesses excellent elastic deformation capability. When the equipment is subjected to vibration or impact during operation, it can absorb and disperse energy through its own elasticity, greatly reducing collision damage between the pressure member 23 and the rocker arm 1, effectively extending the service life of the parts, and reducing noise and abnormal sounds generated by collisions. Furthermore, the gasket 3 can compensate for gap changes caused by vibration, stabilize the connection between the pressure member 23 and the rocker arm 1, ensure that the movement of the valve cover body 21 is accurately transmitted through the connecting shaft 22, precisely control the opening and closing of the bypass valve port 41, and optimize gas flow regulation. In other embodiments, the gasket 3 can be a non-elastic gasket, such as a metal gasket or an asbestos gasket, etc., and is not specifically limited here.

[0052] like Figures 6-7As shown, the gasket 3 is a bowl-shaped gasket, which includes an abutment part, a spring arm, and a support part 31. The abutment part abuts against the upper surface of the rocker arm body 11, one end of the spring arm is connected to the abutment part, and the other end of the spring arm is connected to the support part 31. The support part 31 abuts against the lower surface of the pressing member 23. The gasket 3 consists of an abutment part, a spring arm, and a support part 31 from the center to the edge. The abutment part is in close contact with the upper surface of the rocker arm body 11, the support part 31 is in stable contact with the lower surface of the pressing member 23, and the spring arm connects the abutment part and the support part 31. During the opening and closing of the valve cover body 21, the spring arm can flexibly deform according to the force, effectively buffering the force between the pressing member 23 and the rocker arm 1, preventing rigid collision damage, and avoiding abnormal noise.

[0053] like Figure 7 As shown, the support part 31 includes multiple support plates 311, which are arranged circumferentially around the central axis of the abutment part. The multiple support plates 311 work together to enhance the overall support stability of the gasket 3, allowing the support part 31 to distribute the pressure transmitted by the pressure member 23 more evenly, effectively buffering vibration and impact. The action transmitted by the valve cover body 21 through the connecting shaft 22 is more precise, ensuring reliable opening and closing control of the bypass valve port 41, improving the working efficiency of the bypass valve mechanism, optimizing gas flow regulation, and ensuring stable operation of the turbocharger.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A bypass valve mechanism, disposed within a vortex housing (4), wherein the vortex housing (4) is provided with a bypass valve port (41), characterized in that, include: A rocker arm (1), the first end of which is rotatably connected to the inner wall of the vortex shell (4); The valve cover assembly (2) includes a valve cover body (21), which is disposed at the second end of the rocker arm (1). The side of the valve cover body (21) facing the bypass valve port (41) is constructed as an arc-shaped surface (211). The bypass valve port (41) is provided with a groove (411) that cooperates with the arc-shaped surface (211). The arc-shaped surface (211) can abut or separate from the bottom wall of the groove (411).

2. The bypass valve mechanism according to claim 1, characterized in that, The valve cover assembly (2) further includes a connecting shaft (22), the first end of which is connected to the valve cover body (21), and the second end of which is connected to the rocker arm (1).

3. The bypass valve mechanism according to claim 2, characterized in that, The valve cover assembly (2) further includes a pressing member (23). The rocker arm (1) includes a rocker arm body (11) and a rotating arm (12). The rocker arm body (11) is provided with a through hole (111). The second end of the connecting shaft (22) passes through the through hole (111) and is connected to the pressing member (23). One end of the rotating arm (12) is connected to the rocker arm body (11), and the other end is rotatably connected to the volute (4).

4. The bypass valve mechanism according to claim 3, characterized in that, The second end of the connecting shaft (22) is connected to the pressing member (23) by riveting or welding.

5. The bypass valve mechanism according to claim 3, characterized in that, The bypass valve mechanism also includes a gasket (3), which is sandwiched between the pressing member (23) and the rocker arm (1).

6. The bypass valve mechanism according to claim 5, characterized in that, The gasket (3) is an elastic gasket.

7. The bypass valve mechanism according to claim 5, characterized in that, The gasket (3) is a bowl-shaped gasket, which includes an abutting part, a spring arm and a supporting part (31). The abutting part abuts against the upper surface of the rocker arm body (11). One end of the spring arm is connected to the abutting part, and the other end of the spring arm is connected to the supporting part (31). The supporting part (31) abuts against the lower surface of the pressing member (23).

8. The bypass valve mechanism according to claim 7, characterized in that, The support portion (31) includes multiple support pieces (311), which are arranged circumferentially around the abutment portion with the central axis of the abutment portion as the center.

9. A turbocharger, characterized in that, The device includes a volute housing (4) and a bypass valve mechanism as described in any one of claims 1-8. The volute housing (4) is provided with a volute housing chamber (43) and a bypass pipe (42). The bypass valve port (41) is located in the volute housing chamber (43). One end of the bypass pipe (42) is connected to the bypass valve port (41), and the other end is connected to the engine.

10. The turbocharger according to claim 9, characterized in that, The turbocharger also includes a compressor, and the volute (4) is provided with a compressed gas passage (44), one end of which is connected to the compressor and the other end is connected to the volute chamber (43).

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