Anti-surge valve with adjustable opening pressure

Abstract

The embodiment of the utility model provides an anti-surge valve with adjustable opening pressure, and relates to the technical field of automobile engines. The anti-surge valve comprises a main valve body, a valve element is arranged in the main valve body in a sliding mode and divides the inner space of the main valve body into a control cavity and an exhaust cavity, the control cavity is provided with a control port, the exhaust cavity is provided with an air inlet and an air outlet, and a first spring for preventing the valve element from moving towards one side of the control cavity is arranged between the valve element and the main valve body. When the pressure of the air inlet side is lower than the opening pressure, under the pressing action of the first spring, the valve element blocks the air inlet, the anti-surge valve is in a closed state, when the pressure of the air inlet side is higher than the opening pressure, the anti-surge valve is opened, and an adjusting piston is arranged in a limiting cavity of the valve element in a threaded connection mode. The lower end of the first spring is inserted into the limiting cavity and abuts against the adjusting piston. According to the anti-surge valve with the adjustable opening pressure, the opening pressure of the anti-surge valve can be adjusted according to needs.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile engines, in particular to an anti-surge valve with adjustable opening pressure. Background Art

[0002] Compressor surge refers to the phenomenon of low-frequency, high-amplitude airflow oscillation along the compressor axis, which will cause strong mechanical vibration of the compressor components and cause serious damage to the components in a very short time. When the engine with a turbocharger decelerates, the engine throttle opening will decrease sharply, and the reduction of the turbocharger turbine speed has a lag, so a large back pressure and airflow fluctuation will be generated between the turbocharger and the engine intake, which is prone to surge. In order to avoid this phenomenon, an anti-surge valve is usually installed on the intake side of the engine.

[0003] The existing anti-surge valve generally includes a main valve body formed by an upper valve body and a lower valve body, wherein a valve core capable of sliding up and down relative to the main valve body is arranged in the main valve body, and the valve core divides the internal space of the main valve body into a control chamber and an exhaust chamber. The main valve body is provided with a control port, an air inlet and an air outlet, wherein the control port is connected to the control chamber, and the air inlet and the air outlet are both connected to the exhaust chamber. A spring is arranged between the valve core and the main valve body, and the valve core forms a blockage on the air inlet under the compression of the spring, so that the anti-surge valve is in a normally closed state. When the engine decelerates, the pressure between the turbocharger and the engine air inlet increases, and the pressurized high-pressure gas will overcome the elastic pressure of the spring to push open the valve core, so that the excess gas is discharged through the air outlet, thereby avoiding the occurrence of surge.

[0004] However, currently the opening pressure of the anti-surge valve is determined by a spring and is a fixed value. In actual use, the opening pressure of the anti-surge valve cannot be adjusted according to needs. Utility Model Content

[0005] In view of the above problems, the present application provides an anti-surge valve with adjustable opening pressure, which can adjust the opening pressure of the anti-surge valve according to needs, and the adjustment process is simple to operate.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] 14. The air vent valve of claim 13, wherein the vent valve is secured to the air vent shaft and the air vent is secured to the air vent shaft when the vent valve is secured to the air vent shaft.

[0008] Furthermore, the regulating piston includes a base plate and a guide cylinder arranged on the base plate, one end of the guide column is inserted into the guide cylinder and cooperates with the guide cylinder to form a sliding connection, the other end of the guide column is provided with a first baffle, a second spring is provided between the first baffle and the base plate, and the main valve body is provided with an avoidance opening allowing the guide column to pass through, and a removable blocking member is provided at the avoidance opening.

[0009] Furthermore, an annular boss is provided on the main valve body at the avoidance port, and the blocking member is a nut threadedly connected to the annular boss.

[0010] Furthermore, a sealing gasket is arranged between the nut and the annular boss.

[0011] Furthermore, the guide column is provided with a flat opening.

[0012] Furthermore, a tightening assembly for tightening the valve core is provided on the main valve body.

[0013] Furthermore, the tightening assembly includes a tightening column passing through the side wall of the main valve body, a second baffle is arranged on the tightening column outside the main valve body, a third spring is arranged between the second baffle and the main valve body, and a limiting member is arranged on the tightening column inside the main valve body.

[0014] Furthermore, the limiting member is a nut arranged at the inner end of the tightening column.

[0015] Furthermore, two tightening assemblies are provided on the main valve body, and the two tightening assemblies are symmetrically arranged.

[0016] The beneficial effects of the utility model are:

[0017] An anti-surge valve with adjustable opening pressure provided in an embodiment of the present application is provided with an adjusting piston that can move up and down relative to the valve core in the valve core, and the lower end of the first spring is abutted against the adjusting piston, so that the preload force of the first spring can be changed by adjusting the position of the adjusting piston, thereby adjusting the opening pressure of the anti-surge valve. Compared with the traditional anti-surge valve with fixed opening pressure, the anti-surge valve with adjustable opening pressure provided in an embodiment of the present application can better adapt to different working conditions on the one hand, and on the other hand, when the stiffness coefficient of the first spring changes due to age, the position of the adjusting piston can also be adjusted to maintain a stable opening pressure of the anti-surge valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an anti-surge valve with adjustable opening pressure provided in an embodiment of the present application;

[0019] Figure 2 A side view of an anti-surge valve with adjustable opening pressure provided in an embodiment of the present application;

[0020] Figure 3 for Figure 2 AA section view in;

[0021] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A;

[0022] Figure 5 for Figure 2 BB section view in;

[0023] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of part B;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the regulating piston;

[0025] Figure 8 A schematic diagram of the three-dimensional structure of the adjustment guide column;

[0026] Fig. 9 A schematic diagram of the structure of an anti-surge valve with adjustable opening pressure provided in an embodiment of the present application when in an open state.

[0027] In the figure: 11, upper valve body; 111, cylinder; 1111, control port; 1112, avoidance port; 1113, annular boss; 112, upper flange; 12, lower valve body; 121, body; 1211, air inlet; 1212, air outlet; 122, lower flange; 13, bolt assembly; 14, control chamber; 15, exhaust chamber;

[0028] 2. Valve core; 21. Limiting cavity;

[0029] 3. The first spring;

[0030] 41. regulating piston; 411. bottom plate; 412. guide cylinder; 42. guide column; 421. first baffle; 422. flat mouth; 43. second spring; 44. nut; 45. sealing gasket;

[0031] 5. Clamping assembly; 51. Clamping column; 511. Second baffle; 52. Third spring; 53. Nut. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application, and the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by those skilled in the art without creative work on the basis of the embodiments of the present application shall belong to the protection scope of the present application.

[0033] For the convenience of description, the coordinate system is defined as Figure 1 As shown, the left-right direction is the horizontal direction, the front-back direction is the longitudinal direction, and the up-down direction is the vertical direction.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, an anti-surge valve with adjustable opening pressure includes a main valve body, in which a valve core 2 capable of sliding up and down relative to the main valve body is arranged, and the valve core 2 divides the internal space of the main valve body into a control chamber 14 and an exhaust chamber 15. The main valve body is provided with a control port 1111, an air inlet 1211 and an air outlet 1212, wherein the control port 1111 is connected to the control chamber 14, and the air inlet 1211 and the air outlet 1212 are both connected to the exhaust chamber 15. A first spring 3 is arranged between the valve core 2 and the main valve body to prevent the valve core 2 from moving toward the control chamber 14. When the pressure on the air inlet 1211 side is lower than the opening pressure, under the compression of the first spring 3, the valve core 2 blocks the air inlet 1211. At this time, the air inlet 1211 and the air outlet 1212 are blocked by the valve core 2, and the anti-surge valve is in a closed state; when the pressure on the air inlet 1211 side is higher than the opening pressure, the gas on the air inlet 1211 side can overcome the elastic compression force of the first spring 3 and push the valve core 2 to move toward the control chamber 14. At this time, the air inlet 1211 and the air outlet 1212 are connected through the exhaust chamber 15, the anti-surge valve is in an open state, and the excess gas enters the exhaust chamber 15 from the air inlet 1211 and is discharged through the air outlet 1212.

[0035] For the convenience of description, the pressure on the side of the air inlet 1211 is defined as P1, the pressure on the side of the control port 1111 is defined as P2, and the elastic pressing force of the first spring 3 is defined as F, that is, when P1≤P2+F, the anti-surge valve is in a closed state, and when P1>P2+F, the anti-surge valve is in an open state, where P2+F is the opening pressure. Since the pressure P2 on the side of the control port 1111 is a constant value, the opening pressure is only determined by the elastic pressing force of the first spring 3.

[0036] As a specific implementation, the main valve body described in this embodiment includes an upper valve body 11 and a lower valve body 12, and the upper valve body 11 and the lower valve body 12 are connected and fixed by a bolt assembly 13 to form a whole, and a first sealing ring (not shown in the figure) is provided at the connection between the upper valve body 11 and the lower valve body 12. The upper valve body 11 includes a cylinder 111 with a closed upper end and an open lower end, and an upper flange 112 is provided on the cylinder 111. The lower valve body 12 includes a body 121 and a lower flange 122 provided at the upper end of the body 121, and the upper flange 112 and the lower flange 122 are connected and fixed by a bolt assembly 13, and the first sealing ring is provided between the upper flange 112 and the lower flange 122. The lower valve body 12 is provided with a valve core 2, and the upper end of the valve core 2 is inserted into the cylinder 111 of the upper valve body 11, and cooperates with the cylinder 111 to form a sliding connection. Under the guidance of the cylinder 111, the valve core 2 can slide up and down in the main valve body. A second sealing ring (not shown in the figure) is provided between the valve core 2 and the cylinder 111.

[0037] The control port 1111 is located at the side of the upper end of the upper valve body 11 . The air inlet 1211 is located at the bottom of the lower valve body 12 and is axially aligned with the valve core 2 . The air outlet 1212 is located at the side of the lower valve body 12 .

[0038] Furthermore, the upper flange 112 is located above the lower end surface of the cylinder 111, and the lower end of the cylinder 111 is inserted into the lower valve body 12. A limiting cavity 21 for accommodating the first spring 3 is provided on the upper end surface of the valve core 2, and the lower end of the first spring 3 is inserted into the limiting cavity 21, and the upper end of the first spring 3 abuts against the closed end of the upper valve body 11. In this way, the overall height of the anti-surge valve can be reduced.

[0039] like Figure 3As shown, an adjusting piston 41 is arranged in the limiting cavity 21 of the valve core 2, and the adjusting piston 41 is threadedly connected to the valve core 2. An internal thread is arranged on the cylindrical side of the limiting cavity 21, and an external thread matching the internal thread is arranged on the outer cylindrical surface of the adjusting piston 41. The lower end of the first spring 3 is inserted into the limiting cavity 21 and abuts against the adjusting piston 41.

[0040] The position of the regulating piston 41 in the limiting cavity 21 can be adjusted by rotating the regulating piston 41, thereby changing the pre-compression amount of the first spring 3. When the pre-compression amount of the first spring 3 changes, its elastic pressing force will also change accordingly, thereby changing the opening pressure of the anti-surge valve.

[0041] Furthermore, in order to conveniently adjust the opening pressure of the anti-surge valve. Figure 3 and Figure 4 As shown, the regulating piston 41 includes a bottom plate 411 and a guide cylinder 412 fixedly arranged on the bottom plate 411. Exemplarily, the bottom plate 411 and the guide cylinder 412 are an integrated structure. A guide column 42 is arranged above the regulating piston 41, and the lower end of the guide column 42 is inserted into the guide cylinder 412 and cooperates with the guide cylinder 412 to form a sliding connection, and a first baffle 421 is arranged on the upper end of the guide column 42. The guide column 42 only has the freedom to slide up and down relative to the guide cylinder 412. When the guide column 42 is rotated, the regulating piston 41 can rotate synchronously with the guide column 42. The guide cylinder 412 and the guide column 42 are sleeved with a second spring 43, the lower end of the second spring 43 abuts on the bottom plate 411 of the regulating piston 41, and the upper end of the second spring 43 abuts on the first baffle 421. The upper end portion of the upper valve body 11 is provided with an escape opening 1112 for allowing the guide column 42 to pass through, and a detachable blocking member for blocking the escape opening 1112 is provided at the escape opening 1112 .

[0042] When the opening pressure of the anti-surge valve needs to be adjusted, the blocking piece is first removed. At this time, the guide column 42 will move upward under the elastic action of the second spring 43 and protrude from the outside of the upper valve body 11 through the avoidance port 1112. Then, the guide column 42 is rotated, and the guide column 42 can drive the regulating piston 41 to rotate, thereby adjusting the upper and lower positions of the regulating piston 41. After the adjustment is completed, the guide column 42 is manually pressed down to make the guide column 42 retreat into the upper valve body 11, and then the blocking piece is installed. The entire adjustment process does not require the removal of any pipelines or the use of any tools, and is easy to operate.

[0043] like Figure 3 and Fig. 9 As shown, since there is space between the lower end surface of the guide column 42 and the bottom surface of the guide cylinder 412, when the opening pressure is reached on the air inlet 1211 side, the valve core 2 and the regulating piston 41 will move upward as a whole, and the first spring 3 and the second spring 43 will be compressed.

[0044] In addition to being able to conveniently adjust the opening pressure of the anti-surge valve, this design also has the following advantages: first, the double-layer spring structure can also provide a stable supporting force for the opening and closing of the valve core 2, thereby ensuring the stability of the switch; second, the replacement of the second spring 43 is very convenient, so the opening pressure can also be assisted in adjusting by replacing the second spring 43, thereby increasing the adjustment range of the opening pressure.

[0045] As a specific implementation method, Figure 4 As shown, an annular boss 1113 is provided on the upper valve body 11 in this embodiment at the avoidance opening 1112 , and the blocking member is a nut 44 threadedly connected to the annular boss 1113 .

[0046] Furthermore, a sealing gasket 45 is provided between the nut 44 and the annular boss 1113 .

[0047] As a specific implementation method, Figure 7 and Figure 8 As shown, the guide column 42 described in this embodiment is provided with two symmetrically arranged flat openings 422 , and the inner hole shape of the guide cylinder 412 is consistent with the guide column 42 .

[0048] Furthermore, if Figure 5 and Figure 6 As shown, a tightening assembly 5 for tightening the valve core 2 is provided on the main valve body.

[0049] The tightening assembly 5 includes a tightening column 51, the inner end of which passes through the side wall of the main valve body and extends into the main valve body, and the main valve body is provided with a guide hole that matches the tightening column 51. The tightening column 51 is provided with a second baffle 511 outside the main valve body, and the tightening column 51 is provided with a third spring 52 between the second baffle 511 and the main valve body. The tightening column 51 is provided with a stopper in the main valve body to prevent the tightening column 51 from slipping out of the guide hole.

[0050] When the opening pressure of the anti-surge valve needs to be adjusted, the tightening column 51 is pressed so that the tightening column 51 tightens the valve core 2. At this time, when the guide column 42 is rotated, the valve core 2 can be prevented from rotating together due to the friction force.

[0051] Furthermore, two tightening assemblies 5 are provided on the main valve body, and the two tightening assemblies 5 are symmetrically arranged.

[0052] As a specific implementation manner, the tightening assembly 5 described in this embodiment is arranged on the lower valve body 12 .

[0053] As a specific implementation, the position-limiting member in this embodiment is a nut 53, and the second baffle plate 511 and the tightening column 51 are an integrated structure. The tightening column 51 includes a first shaft section and a second shaft section from the outside to the inside, and the diameter of the first shaft section is greater than the diameter of the second shaft section. The second shaft section is provided with an external thread that matches the nut 53.

[0054] Furthermore, a third sealing ring (not shown in the figure) is provided between the guide hole and the tightening column 51 .

[0055] Other embodiments obtained by those skilled in the art by combining, splitting, reorganizing, etc. the embodiments of the present application on the basis of the embodiments provided in the present application do not exceed the protection scope of the present application.

[0056] The above specific implementation methods have detailed the purpose, technical solutions and beneficial effects of the embodiments of the present application. The above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. That is, any modifications, equivalent substitutions, improvements, etc. made on the basis of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. An anti-surge valve with adjustable opening pressure, comprising a main valve body, a valve core (2) slidably arranged in the main valve body, and the valve core (2) divides the internal space of the main valve body into a control chamber (14) and an exhaust chamber (15), the control chamber (14) is provided with a control port (1111), the exhaust chamber (15) is provided with an air inlet (1211) and an air outlet (1212), and a first spring is arranged between the valve core (2) and the main valve body to prevent the valve core (2) from moving toward the control chamber (14) side (3), when the pressure on the air inlet (1211) side is lower than the opening pressure, under the compression of the first spring (3), the valve core (2) blocks the air inlet (1211), and the anti-surge valve is in a closed state; when the pressure on the air inlet (1211) side is higher than the opening pressure, the gas on the air inlet (1211) side can overcome the elastic compression force of the first spring (3) and push the valve core (2) to move toward the control chamber (14), and the anti-surge valve is in an open state, characterized in that: An adjusting piston (41) is provided in the limiting cavity (21) of the valve core (2) by means of a threaded connection, and the lower end of the first spring (3) is inserted into the limiting cavity (21) and abuts against the adjusting piston (41).

2. The anti-surge valve with adjustable opening pressure according to claim 1, characterized in that: The regulating piston (41) comprises a base plate (411) and a guide cylinder (412) arranged on the base plate (411); one end of the guide column (42) is inserted into the guide cylinder (412) and cooperates with the guide cylinder (412) to form a sliding connection; the other end of the guide column (42) is provided with a first baffle (421); a second spring (43) is provided between the first baffle (421) and the base plate (411); a bypass opening (1112) is provided on the main valve body to allow the guide column (42) to pass through; a detachable blocking member is provided at the bypass opening (1112).

3. The anti-surge valve with adjustable opening pressure according to claim 2, characterized in that: An annular boss (1113) is provided on the main valve body at the avoidance opening (1112), and the blocking member is a nut (44) threadedly connected to the annular boss (1113).

4. The anti-surge valve with adjustable opening pressure according to claim 3, characterized in that: A sealing gasket (45) is provided between the nut (44) and the annular boss (1113).

5. The anti-surge valve with adjustable opening pressure according to claim 2, characterized in that: The guide column (42) is provided with a flat opening (422).

6. The anti-surge valve with adjustable opening pressure according to claim 1, characterized in that: The main valve body is provided with a tightening assembly (5) for tightening the valve core (2).

7. The anti-surge valve with adjustable opening pressure according to claim 6, characterized in that: The tightening assembly (5) comprises a tightening column (51) penetrating the side wall of the main valve body, a second baffle (511) is arranged on the tightening column (51) outside the main valve body, a third spring (52) is arranged between the second baffle (511) and the main valve body, and a limiting member is arranged on the tightening column (51) inside the main valve body.

8. The anti-surge valve with adjustable opening pressure according to claim 7, characterized in that: The limiting member is a nut (53) arranged at the inner end of the tightening column (51).

9. The anti-surge valve with adjustable opening pressure according to claim 6, characterized in that: Two tightening assemblies (5) are arranged on the main valve body, and the two tightening assemblies (5) are symmetrically arranged.

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