Anti-surge device and engine

Abstract

The anti-surge device comprises an anti-surge valve, the anti-surge valve comprises a valve deck, a valve element and a valve seat, and the anti-surge valve is used for guiding out gas in front of a throttle valve in the sudden closing state of the throttle valve through a gas leakage channel; the hydraulic auxiliary device comprises a one-way valve and a pressure relief control valve which act on the anti-surge valve, the one-way valve and the pressure relief control valve are respectively provided with a pressure flow channel communicated with the anti-surge valve, and the anti-surge valve is locked or opened in an auxiliary mode through pressurization or pressure relief of the pressure flow channels. According to the received air pressure, the air leakage channel of the anti-surge valve can be opened in different sizes according to different pressure values, the situation that the air inlet pressure drops too fast due to too large opening is prevented, the requirement of a whole vehicle for the air inlet flow pressure is met, it is guaranteed that air inlet meets the performance requirement of the whole vehicle, meanwhile, the flowing stability of air in a pipeline is kept, and the service life is prolonged. Irregular vibration of the valve body caused by too large opening or too fast pressure relief is avoided, so that the whole machine runs more safely.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engines, and particularly relates to an anti-surge device and an engine. BACKGROUND

[0002] The anti-surge valve is a key component in the turbocharging system, and is used for preventing surge at the compressor end, protecting the turbocharger and the engine for stable operation.

[0003] When the throttle is suddenly closed (such as sudden release of the accelerator), the intake airflow is blocked, the high-pressure airflow at the compressor outlet reversely impacts the impeller, leading to blade vibration and dramatic fluctuation of the boost pressure, and the turbine may be damaged. The anti-surge valve is used for rapidly opening the valve to bypass the excess high-pressure airflow back to the compressor inlet or release the pressure to the atmosphere, eliminate the reverse pressure, protect the turbocharger, avoid the axial / radial load mutation of the impeller caused by surge, prolong the service life of the turbine, reduce the pressure impact on the turbine shaft seal, and prevent oil leakage. The pressure is rapidly released during sudden deceleration, and the turbine can rapidly rebuild the boost pressure during acceleration again, reducing turbine lag.

[0004] The main function of the anti-surge valve is to balance the boost pressure and prevent surge of the compressor, but if the opening degree is too large or the pressure release is too fast, that is, the valve is opened too early or excessively, a large amount of boost gas is bypassed, leading to a decrease in the actual gas pressure entering the cylinder, which may cause a decrease in the engine torque output, a lack of acceleration, and more obvious turbine lag, and the time for rebuilding the boost pressure is prolonged. At the same time, the pressure release airflow is too fast, which may produce high-frequency whistling or "sibilant" noise, and may cover other abnormal noises (such as turbine bearing wear), leading to adverse effects such as delayed fault diagnosis.

[0005] In addition, when the anti-surge valve is rapidly opened, the high-pressure airflow is instantaneously released, forming airflow pulsation, which impacts the valve flap or piston structure. If the opening degree of the valve is too large or the pressure release speed is too fast, the airflow may form turbulent flow inside the valve body, leading to high-frequency vibration of the valve flap, and if the natural frequency of the valve is close to the airflow pulsation frequency, resonance may be induced, and the vibration is intensified. The vibration may lead to wear of the valve sealing surface, fatigue of the spring, and even loosening of the bolts during long-term use, affecting the operation safety of the whole machine. CONTENT OF THE UTILITY MODEL

[0006] The application provides an anti-surge device and an engine, which can prevent irregular vibration of the valve body caused by too large opening degree of the valve or too fast pressure release speed while preventing surge of the compressor.

[0007] The technical scheme adopted by the application is as follows:

[0008] An anti-surge device is arranged on a pipeline between a turbocharger and a throttle, and comprises:

[0009] The anti-surge valve includes a valve cover, a valve core and a valve seat, and is used for guiding the gas before the throttle valve to a vent passage when the throttle valve is suddenly closed;

[0010] The hydraulic auxiliary device includes a one-way valve and a pressure relief control valve acting on the anti-surge valve, and the one-way valve and the pressure relief control valve are respectively provided with a pressure flow channel connected to the anti-surge valve, and the anti-surge valve is assisted to lock or open through the pressure or pressure relief of the pressure flow channel.

[0011] In a preferred embodiment of the anti-surge device, the anti-surge valve, the one-way valve and the pressure relief control valve each include an open state and a lock state, and when the throttle valve is suddenly closed, the anti-surge valve is configured to switch to the open state, and the one-way valve is configured to switch to the lock state.

[0012] In a preferred embodiment of the anti-surge device, when the anti-surge valve is in the open state, the pressure relief control valve is configured to open when the valve core moves to a preset position.

[0013] In a preferred embodiment of the anti-surge device, the valve cover is provided with a first cavity connected to the one-way valve and a second cavity connected to the pressure relief control valve, and the pressure flow channel includes a pressure flow channel in the first cavity and a pressure relief flow channel in the second cavity.

[0014] In a preferred embodiment of the anti-surge device, the second cavity is T-shaped, and the T-shaped cavity is parallel to the first cavity.

[0015] In a preferred embodiment of the anti-surge device, the valve cover further includes a third cavity, and the third cavity is connected to the second cavity, and the valve core moves along the third cavity to a preset position to open the pressure relief control valve.

[0016] In a preferred embodiment of the anti-surge device, the third cavity is L-shaped, and the long side of the L-shaped third cavity is parallel to the first cavity, and the short side of the L-shaped third cavity directly communicates with the second cavity.

[0017] In a preferred embodiment of the anti-surge device, the hydraulic auxiliary device further includes an oil storage cavity connected to the one-way valve and the pressure relief control valve, and the oil storage cavity is provided with hydraulic oil.

[0018] In a preferred embodiment of the anti-surge device, the one-way valve and the pressure relief control valve are each provided with a spring.

[0019] The engine further includes a supercharger and a throttle valve, the throttle valve is connected to the gas outlet end of the supercharger, and the anti-surge device according to any one of the above embodiments is connected to the gas inlet end of the throttle valve.

[0020] Due to the adoption of the above technical solutions, the application has the following beneficial effects:

[0021] The present scheme prevents compressor surge by discharging high-pressure gas flow through the anti-surge valve. When the throttle is suddenly closed, such as when the accelerator is suddenly released, the excess pressurized gas is bypassed to the compressor inlet by opening the anti-surge valve, avoiding vibration, pressure fluctuation and mechanical damage caused by reverse flow impact on the impeller, protecting the turbine bearing and seal, and prolonging the service life of the supercharger. In addition, the anti-surge valve reduces turbine lag by stabilizing gas flow pressure, ensuring smooth engine power response. At the same time, the present scheme sets up a hydraulic auxiliary device, which pressurizes or depressurizes the anti-surge valve through a pressure flow channel. Since the pressure flow channel is in communication with the anti-surge valve, during the opening and closing of the anti-surge valve, the hydraulic flow channel is controlled by the pressure relief control valve and the one-way valve, and the anti-surge valve exhaust passage can be opened to different sizes according to the pressure value, preventing the intake pressure from dropping too fast due to the opening being too large, meeting the demand of the vehicle for intake flow pressure, ensuring that the intake meets the performance needs of the whole machine, and maintaining the stability of gas flow in the pipeline, avoiding irregular vibration of the valve body caused by excessive opening or rapid pressure relief, making the whole machine run more safely. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 It is a structural schematic view of the anti-surge device in an embodiment of the present application;

[0024] Figure 2 It is a sectional view of the anti-surge valve in an embodiment of the present application;

[0025] Figure 3 It is an explosion view of the anti-surge device in an embodiment of the present application;

[0026] Figure 4 It is a sectional view of the anti-surge valve from another angle in an embodiment of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS:

[0028] 100-anti-surge valve, 110-valve cover, 111-first cavity, 112-second cavity, 113-third cavity, 120-valve core, 130-valve seat, 140-exhaust passage;

[0029] 200-one-way valve, 210-pressurizing flow channel;

[0030] 300-pressure relief control valve, 310-pressure relief flow channel;

[0031] 400-oil storage cavity. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0033] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application, however, can be practiced in a variety of ways other than those specifically described herein, and the scope of the present application is not limited to the specific embodiments described herein. It is to be noted that in this document and in its claims, the singular forms "a", "an" and "the" do not exclude the plural reference unless the context clearly dictates otherwise. Thus, the references "a", "an" and "the" are generally construed to mean "one or more" unless otherwise stated.

[0034] In addition, in the description of the present application, it needs to be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, or communication; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0037] The present application provides an anti-surge device, as shown in Figures 1 to 4 is arranged on the pipeline between the supercharger and the throttle valve, comprising:

[0038] The anti-surge valve 100 includes a valve cover 110, a valve core 120 and a valve seat 130, and is used to guide the gas before the throttle valve in the throttle valve sudden closing state out through a bleeder passage 140.

[0039] The hydraulic auxiliary device includes a one-way valve 200 and a pressure relief control valve 300 acting on the anti-surge valve 100, and the one-way valve 200 and the pressure relief control valve 300 are respectively provided with a pressure flow channel communicating with the anti-surge valve 100, and the anti-surge valve 100 is assisted to lock or open through the pressure or pressure relief of the pressure flow channel.

[0040] The scheme prevents the compressor from surging by discharging high-pressure gas flow through the anti-surge valve 100. When the throttle valve is suddenly closed, such as when the accelerator is suddenly released, the excess pressurized gas is bypassed to the compressor inlet by opening the anti-surge valve 100, avoiding the vibration, pressure fluctuation and mechanical damage caused by the reverse impact of the gas flow on the impeller, protecting the turbine bearing and seal, and prolonging the service life of the supercharger. In addition, the anti-surge valve 100 reduces turbine hysteresis by stabilizing the gas flow pressure, ensuring smooth engine power response. At the same time, the scheme sets a hydraulic auxiliary device, there is pressure relief oil in the pressure flow channel, and the anti-surge valve 100 is pressurized or depressurized through the pressure flow channel. Since the pressure flow channel is in communication with the anti-surge valve 100, in the application process, it is controlled by the hydraulic flow channel of the pressure relief control valve 300 and the one-way valve 200, and the anti-surge valve 100 bleeder passage 140 can be opened in different sizes according to different pressure values, preventing the opening from being too large to cause the intake pressure to drop too quickly, meeting the demand of the whole vehicle for intake flow pressure, ensuring that the intake meets the performance needs of the whole machine, while maintaining the stability of the gas flow in the pipeline, avoiding excessive opening or excessive pressure relief that causes irregular vibration of the valve body, making the whole machine run more safely.

[0041] It should be noted that the throttle valve sudden closing state mentioned above is understood by those skilled in the art.

[0042] In one embodiment, the anti-surge valve 100, the one-way valve 200 and the pressure relief control valve 300 each include an open state and a locked state, and when the throttle valve is in a sudden closing state, the anti-surge valve 100 is configured to switch to the open state, and the one-way valve 200 is configured to switch to the locked state.

[0043] When the throttle is suddenly closed, the intake air flow is blocked, and a reverse pressure impact occurs. Under the reverse pressure impact, the valve core 120 of the anti-surge valve 100 moves, the anti-surge valve 100 is opened, the air vent passage 140 is connected, the valve core 120 moves to drive the extruded hydraulic oil to move, the check valve 200 is locked under the reverse pressure, the high-pressure gas in front of the throttle is bypassed and depressurized when the throttle is suddenly closed, and at the same time, due to the pressure resistance of the check valve 200, the opening of the anti-surge valve 100 or the rapid depressurization can be avoided, the stability of the gas flow is maintained, and irregular vibration of the valve body is avoided.

[0044] At the same time, when the anti-surge valve 100 is in an open state, the pressure relief control valve 300 is configured to be opened when the valve core 120 moves to a preset position.

[0045] The hydraulic auxiliary device simultaneously realizes internal air pressure balance adjustment of the anti-surge device through the pressure relief control valve 300. Due to the characteristics of the check valve 200, when the check valve 200 is subjected to the reverse pressure transmitted by the anti-surge valve 100, the check valve 200 is locked, but cannot discharge the hydraulic oil. In order to avoid the accumulation of hydraulic oil in the cavity of the anti-surge valve 100, when the valve core 120 moves to a preset position, the hydraulic oil is pushed to flow, the pressure relief control valve 300 is pressurized, and it can be understood that the preset position can be set according to experience and experimental simulation for those skilled in the art. The pressure relief control valve 300 is switched to an open state, so that the pressure passage is opened, the hydraulic oil is discharged, and the accumulation of hydraulic oil in the anti-surge valve 100 is avoided.

[0046] In one embodiment, as shown in Figure 1 、 Figure 2 The hydraulic auxiliary device further comprises an oil storage cavity 400 in communication with the check valve 200 and the pressure relief control valve 300, and the oil storage cavity 400 is provided with hydraulic oil.

[0047] When the pressure relief control valve 300 is in an open state, the hydraulic oil is discharged to the oil storage cavity 400 through the pressure passage, and at the same time, since the oil storage cavity 400 is in communication with the check valve 200, the hydraulic oil in the oil storage cavity 400 flows to the check valve 200. On the one hand, the check valve 200 is subjected to pressure, and on the other hand, the anti-surge valve 100 is vented, so that the air pressure in the anti-surge valve 100 gradually decreases, the hydraulic pressure at the check valve 200 gradually increases, the check valve 200 is switched from a locked state to an open state, the hydraulic oil is introduced to the valve core 120 of the anti-surge valve 100 through the pressure flow passage of the check valve 200, the upper part of the anti-surge valve 100 is pressurized, the lower part of the anti-surge valve 100 is bypassed and discharged, the valve core 120 of the anti-surge valve 100 falls back, and the anti-surge valve 100 is switched to a locked state.

[0048] At the same time, due to the falling of the valve core 120 of the anti-surge valve 100, the pressure on the pressure relief control valve 300 is removed, the pressure relief control valve 300 is reset, and is switched to the locking state.

[0049] In addition, in addition to the oil storage cavity 400, other simple structures or components can also be provided instead of the oil storage cavity 400 to achieve the same effect. In the embodiment, the one-way valve 200 and the pressure relief control valve 300 are connected by a pipeline, and the oil storage cavity 400 is formed inside the pipeline.

[0050] In the above process, due to the flow characteristics of the hydraulic oil and the communication between the valves, the anti-surge valve 100 can maintain stability during opening, avoid irregular vibration of the valve body, improve the NVH performance, and make the whole machine run more safely.

[0051] Further, the valve cover 110 is provided with a first cavity 111 connected with the one-way valve 200 and a second cavity 112 connected with the pressure relief control valve 300, and the pressure flow channel includes a pressurizing flow channel 210 located in the first cavity 111 and a pressure relief flow channel 310 located in the second cavity 112.

[0052] The one-way valve 200 and the pressure relief control valve 300 are arranged at the valve cover 110 of the anti-surge valve 100, and the overall integrated structure is compact and reasonable in layout. The one-way valve 200 is arranged at the first cavity 111, and the hydraulic oil is pressed into the valve core 120 of the anti-surge valve 100 through the pressurizing flow channel 210. The pressure relief control valve 300 is arranged at the second cavity 112, and the hydraulic oil pressed out of the anti-surge valve 100 is discharged through the pressure relief flow channel 310.

[0053] In one embodiment, as shown in Figure 2 The second cavity 112 is in the shape of T, and the T-shaped cavity part is parallel to the first cavity 111.

[0054] The specific structure of the T-shaped cavity can refer to Figure 2 The part parallel to the first cavity 111 forms the pressure relief flow channel 310, and the other part perpendicular to the pressure relief flow channel 310 is provided with the pressure relief control valve 300.

[0055] At the same time, the first cavity 111 and the part forming the pressure relief flow channel 310 are arranged perpendicular to the valve core 120 of the valve cover 110, so that the one-way valve 200 can quickly act on the anti-surge valve 100, and at the same time, it is beneficial to shorten the discharge path of the hydraulic oil when the anti-surge valve 100 is in the open state.

[0056] Further, the valve cover 110 further includes a third cavity 113, and the third cavity 113 is communicated with the second cavity 112. The valve core 120 moves along the third cavity 113 to a preset position to make the pressure relief control valve 300 open.

[0057] Further, the third cavity 113 is in L shape, and the long side of the L shape of the third cavity 113 is parallel to the first cavity 111, and the short side of the L shape of the third cavity 113 directly communicates with the second cavity 112.

[0058] In combination Figure 2 It can be seen that the long side of the third cavity 113 is parallel to the pressurizing flow channel 210 and the pressure relief flow channel 310, and is arranged along the moving direction of the valve core 120 of the anti-surge valve 100, which is beneficial to the rapid and smooth movement of the valve core 120, and the structure is simple in processing mode and low in processing difficulty. The other part of the third cavity 113 is connected with the second cavity 112, so that when the valve core 120 moves upward, the hydraulic oil is pressed into the second cavity 112 to push the pressure relief control valve 300 to open, and the pressure relief flow channel 310 is opened.

[0059] In an embodiment, the one-way valve 200 and the pressure relief control valve 300 are both provided with springs.

[0060] It can be understood that the valve is provided with a spring, which is a common way and can be realized by using the prior art. In this embodiment, the spring is used to realize automatic reset, and the opening pressure of the valve is set by the pre-tightening force of the spring, which is beneficial to stable pressure control. The spring continuously provides the pre-tightening force to ensure the close fit of the valve core 120, reduce leakage, and at the same time, reduce the dependence on external energy, rely on the mechanical elasticity of the spring instead of external energy, save energy and avoid failure caused by power failure. Figure 2 , Figure 4 It can be seen that the one-way valve 200 and the pressure relief control valve 300 are both provided with springs.

[0061] Further, the application also provides an engine comprising a supercharger and a throttle valve, wherein the throttle valve is connected with the gas outlet of the supercharger, and the anti-surge device according to any one of the above embodiments is connected with the gas inlet of the throttle valve.

[0062] The application does not describe the places that can be realized by using or referring to the prior art.

[0063] Each embodiment in the specification is described in a progressive manner, and the same and similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the differences from other embodiments.

[0064] The above description is only an embodiment of the application and is not used to limit the application. Those skilled in the art can make various changes and modifications to the application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the scope of the claims of the application.

Claims

1. An anti-surge device disposed in a line between a supercharger and a throttle, characterized by, The application relates to an anti-surge device, comprising: an anti-surge valve (100) comprising a valve cover (110), a valve core (120) and a valve seat (130), the anti-surge valve (100) being used for guiding gas before a throttle valve to a vent passage (140) when the throttle valve is suddenly closed; a hydraulic auxiliary device comprising a check valve (200) and a pressure relief control valve (300) acting on the anti-surge valve (100), the check valve (200) and the pressure relief control valve (300) being respectively provided with pressure flow channels connected with the anti-surge valve (100), and the anti-surge valve (100) being assisted by pressure or pressure relief through the pressure flow channels to be locked or opened.

2. The anti-surge device of claim 1, wherein The anti-surge valve (100), the check valve (200) and the pressure relief control valve (300) each comprise an open state and a locked state, and when the throttle valve is suddenly closed, the anti-surge valve (100) is configured to switch to the open state, and the check valve (200) is configured to switch to the locked state.

3. The anti-surge device of claim 2, wherein, When the anti-surge valve (100) is in the open state, the pressure relief control valve (300) is configured to be opened when the valve core (120) moves to a preset position.

4. The anti-surge device of claim 3, wherein The valve cover (110) is provided with a first cavity (111) connected with the check valve (200) and a second cavity (112) connected with the pressure relief control valve (300), and the pressure flow channels comprise a pressurizing flow channel (210) located in the first cavity (111) and a pressure relief flow channel (310) located in the second cavity (112).

5. The anti-surge device of claim 4, wherein, The second cavity (112) is T-shaped, and the T-shaped cavity is parallel to the first cavity (111).

6. The anti-surge device of claim 4, wherein, The valve cover (110) further comprises a third cavity (113) connected with the second cavity (112), and the valve core (120) moves along the third cavity (113) to the preset position to open the pressure relief control valve (300).

7. The anti-surge device of claim 6, wherein, The third cavity (113) is L-shaped, and the long side of the L-shaped third cavity (113) is parallel to the first cavity (111), and the short side of the L-shaped third cavity (113) directly communicates with the second cavity (112).

8. The anti-surge device of claim 1, wherein, The hydraulic auxiliary device further comprises an oil storage cavity (400) connected with the check valve (200) and the pressure relief control valve (300), and the oil storage cavity (400) is provided with hydraulic oil.

9. The anti-surge device of claim 1, wherein, The check valve (200) and the pressure relief control valve (300) are each provided with a spring.

10. An engine comprising a supercharger and a throttle valve in communication with an air outlet of the supercharger, characterized by, The application further relates to the anti-surge device according to any one of claims 1-9, and the anti-surge device is connected with an air inlet end of the throttle valve.

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