Pneumatic actuator and turbocharger

Abstract

The present invention discloses a pneumatic actuator and a turbocharger, wherein the pneumatic actuator comprises a housing, a flexible diaphragm and an actuator assembly, wherein the flexible diaphragm is arranged in the housing and divides the space in the housing into a pressure chamber and a piston chamber, the housing is provided with an air nozzle connected to the pressure chamber, the actuator assembly is arranged in the piston chamber and cooperates with the flexible diaphragm, wherein: the actuator assembly comprises an inner piston shell, a connecting seat, a spring and a cable; the connecting seat is arranged on the inner piston shell, one end of the spring abuts against the bottom of the housing, and the other end of the spring abuts against the inner piston shell to press the inner piston shell against the flexible diaphragm; a through hole is formed at the bottom of the housing, one end of the cable is fixed on the connecting seat, and the other end of the cable passes through the through hole to connect to the exhaust valve assembly of the turbocharger. The pneumatic actuator and turbocharger of the present invention are intended to solve the technical problem that the current actuator arrangement space is limited and is not conducive to the miniaturization of the supercharger assembly.

Description

Technical Field

[0001] The present invention relates to the field of turbocharging, and in particular to a pneumatic actuator and a turbocharger. Background Art

[0002] The turbocharger uses the energy of exhaust gas to drive the turbine to work. The high-speed rotation of the turbine drives the coaxial compressor impeller to work, thereby increasing the intake pressure and the intake volume. When the engine is at low speed and high load, the turbocharger does not have enough energy to work, and the bleed valve is in a fully closed state; when the engine is at high speed and high load, the engine exhaust energy is sufficient, and the excess exhaust energy from the turbocharger needs to be discharged by opening the bleed valve. The opening and closing of the turbocharger bleed valve is controlled by a pneumatic actuator.

[0003] At present, the core rod assembly at the output end of the pneumatic actuator is a rigid part. The actuator generally outputs back and forth in a straight line through the shaft. This rigid output method results in the actuator being arranged only in the circumferential plane of the rocker arm connected to control the opening of the exhaust valve. The arrangement space is limited, which is not conducive to the miniaturization of the supercharger assembly. Moreover, since the actuator is arranged at the turbine end of the supercharger, a large amount of cost is required on the heat-resistant protective material of the actuator.

[0004] In view of this, it is necessary to propose a new pneumatic actuator and turbocharger to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a pneumatic actuator and a turbocharger, which are intended to solve the current technical problem that the actuator arrangement space is limited and is not conducive to the miniaturization of the turbocharger assembly.

[0006] In order to achieve the above-mentioned object, the present invention provides a pneumatic actuator, comprising a housing, a flexible diaphragm and an actuator assembly, wherein the flexible diaphragm is arranged in the housing and divides the space in the housing into a pressure chamber and a piston chamber, the housing is provided with an air nozzle connected to the pressure chamber, and the actuator assembly is arranged in the piston chamber and cooperates with the flexible diaphragm;

[0007] The actuator assembly includes an inner piston shell, a connecting seat, a spring and a cable; the connecting seat is arranged on the inner piston shell, one end of the spring abuts against the bottom of the shell, and the other end of the spring abuts against the inner piston shell to press the inner piston shell against the flexible diaphragm; a through hole is formed at the bottom of the shell, one end of the cable is fixed on the connecting seat, and the other end of the cable passes through the through hole to connect to the exhaust valve assembly of the turbocharger.

[0008] Preferably, the pneumatic actuator also includes a pad assembly and a spherical part. The pad assembly is arranged between the spring and the bottom of the shell. A spherical hole facing the through hole is formed in the pad assembly. The spherical part is rotatably matched with the spherical hole, and a limiting hole is provided on the spherical part for the cable to pass through.

[0009] Preferably, the pad assembly includes a support plate and a sealing gasket arranged on the support plate, the support plate is fixed to the bottom of the shell, and the sealing gasket is made of rubber material.

[0010] Preferably, the gasket assembly further comprises a spring seat for cooperating with the spring, wherein the spring seat is arranged between the sealing gasket and the spring.

[0011] Preferably, the housing comprises an upper shell and a lower shell, the flexible diaphragm is arranged between the upper shell and the lower shell, the upper shell and the flexible diaphragm enclose the pressure chamber, and the lower shell and the flexible diaphragm enclose the piston chamber.

[0012] Preferably, the air nozzle is riveted to the side wall of the upper shell.

[0013] Preferably, the top of the upper shell is recessed toward the flexible diaphragm.

[0014] Preferably, a T-shaped connecting portion is provided at one end of the pull cable, and a T-shaped groove matching with the T-shaped connecting portion is provided on the connecting seat.

[0015] Preferably, a positioning pin hole is further provided on the T-shaped slot, and the T-shaped connecting portion is limited in the T-shaped slot by a pin.

[0016] In addition, the present invention further provides a turbocharger, which includes a turbocharger body and the pneumatic actuator as described above, wherein a cable of the pneumatic actuator is connected to an air release valve assembly of the turbocharger body.

[0017] In the scheme of the present application, the pneumatic actuator includes a housing, a flexible diaphragm and an actuator assembly. The flexible diaphragm is arranged in the housing and divides the space in the housing into a pressure chamber and a piston chamber. The pressurized gas is input into the pressure chamber through the gas nozzle on the housing, pressing the flexible diaphragm to deform toward the piston chamber to drive the actuator. The actuator assembly of the pneumatic actuator is a flexible cable. When the actuator is working, the gas input between the actuator housing and the flexible diaphragm overcomes the spring force of the spring to push the inner piston shell to move, driving the cable output displacement, and the cable pulls the exhaust valve assembly to rotate, thereby controlling the turbocharger exhaust valve to open to an appropriate degree. Because the cable is a flexible part, it can be bent in space at will, so that the actuator can be flexibly arranged according to the installation needs, and is no longer limited by the position requirements of the exhaust valve assembly. It can not only reduce the layout space of the turbocharger, but also reduce the material cost of the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 is a schematic structural diagram of a pneumatic actuator according to an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a partial structure of a pneumatic actuator according to an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the shell structure of a pneumatic actuator according to an embodiment of the present invention;

[0022] Figure 4 for Figure 2 A partial view of

[0023] Figure 5 It is a cross-sectional schematic diagram of a spherical component of a pneumatic actuator according to an embodiment of the present invention.

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0025] Description of Figure Numbers:

[0026] 100-housing, 110-pressure chamber, 120-piston chamber;

[0027] 101-upper shell, 102-lower shell, 103-air nozzle, 104-through hole;

[0028] 200-flexible diaphragm;

[0029] 310-inner piston housing, 320-connecting seat, 330-spring, 340-cable;

[0030] 321-T-slot, 322-locating pin hole, 323-washer;

[0031] 400- pad assembly, 410- support plate, 420- sealing gasket, 430- spring seat;

[0032] 500-spherical parts. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] Please refer to the attached Figure 1 To Attachment Figure 3In order to achieve the above-mentioned purpose, the present invention provides a pneumatic actuator, including a housing 100, a flexible diaphragm 200 and an actuator assembly, wherein the flexible diaphragm 200 is arranged in the housing 100 and divides the space in the housing 100 into a pressure chamber 110 and a piston chamber 120, and the housing 100 is provided with a gas nozzle 103 connected to the pressure chamber 110, and the actuator assembly is arranged in the piston chamber 120 and cooperates with the flexible diaphragm 200, and the actuator assembly includes an inner piston shell 310, a connecting seat 320, and a spring 3 30 and a cable 340; a connecting seat 320 is arranged on the inner piston shell 310, one end of the spring 330 abuts against the bottom of the shell 100, and the other end of the spring 330 abuts against the inner piston shell 310 to press the inner piston shell 310 against the flexible diaphragm 200; a through hole 104 is formed at the bottom of the shell 100, one end of the cable 340 is fixed on the connecting seat 320, and the other end of the cable 340 passes through the through hole 104 to connect the exhaust valve assembly of the turbocharger.

[0038] The pressurized gas is input into the pressure chamber 110 through the gas nozzle 103 on the housing 100. When the pressure in the pressure chamber 110 is too high, the flexible diaphragm 200 is pressed to deform toward the piston chamber 120. The deformed flexible diaphragm 200 drives the piston housing and the cable 340 to move downward, pulling the deflation valve assembly to rotate.

[0039] The spring 330 is used to press the piston housing against the flexible diaphragm 200, so that the piston housing can move with the flexible diaphragm 200. When the pressure in the pressure chamber 110 disappears, the spring 330 resets the piston housing.

[0040] The connecting seat 320 is used to connect the inner piston housing 310 and the cable 340. The cable 340 is preferably a steel cable, which can meet the rigidity and flexibility requirements for pulling the deflation valve assembly to rotate.

[0041] In the solution of the present application, the actuator assembly of the pneumatic actuator is a flexible cable 340. When the actuator is working, the gas input between the actuator housing 100 and the flexible diaphragm 200 overcomes the spring force of the spring 330 to push the inner piston shell 310 to move, driving the cable 340 to move. The cable 340 pulls the exhaust valve assembly to rotate, thereby controlling the turbocharger exhaust valve to open to an appropriate degree. Because the cable 340 is a flexible part, it can be bent in space at will, so that the actuator can be flexibly arranged according to installation needs, and is no longer limited by the position requirements of the exhaust valve assembly. It can not only reduce the layout space of the turbocharger, but also reduce the material cost of the actuator.

[0042] It should be noted that the present invention is described in the drawings by taking a positive pressure pneumatic actuator as an example, but the invention is not limited thereto, and any actuator structure that can use the solution of the present application should fall within the protection scope of the present invention, such as a negative pressure pneumatic actuator and other types of actuators.

[0043] Please see attached Figure 2 As a specific embodiment of the present invention, the pneumatic actuator also includes a pad assembly 400 and a spherical member 500. The pad assembly 400 is arranged between the spring 330 and the bottom of the housing 100. A spherical hole facing the through hole 104 is formed in the pad assembly 400. The spherical member 500 rotates with the spherical hole, and a limiting hole for the cable 340 to pass through is provided on the spherical member 500. In this embodiment, since the actuator is replaced with a flexible cable 340, friction will always occur between the cable 340 and the housing 100 during the execution process. In order to prevent the cable 340 from breaking due to wear, the pad assembly 400 and the spherical member 500 can be provided. The pad assembly 400 is arranged between the spring 330 and the bottom of the housing 100, and a spherical member 500 is provided inside, and the cable 340 passes through the spherical member 500. Since the spherical member 500 can rotate along with the deformation of the cable 340, the friction between the cable 340 and the housing 100 is transferred to the friction between the spherical member 500 and the housing 100 and the pad assembly 400, thereby preventing the cable 340 from being worn. Figure 5 The spherical member 500 is preferably a steel ball structure, and both ends of the inner hole of the steel ball can be provided with smoothly transitional skirts to prevent sharp edges from causing wear to the cable 340 during the operation of the cable 340.

[0044] Further, the pad assembly 400 includes a support plate 410 and a sealing gasket 420 disposed on the support plate 410, the support plate 410 is fixed to the bottom of the housing 100, and the sealing gasket 420 is made of rubber. In this embodiment, the sealing gasket 420 is used for dust prevention. The specific material of the support plate 410 is not limited, and the support plate 410 can be threadedly fixed to the bottom of the housing 100. The support plate 410 and the sealing gasket 420 are each provided with a hemispherical hole, which is enclosed to form a spherical hole. Further, the pad assembly 400 can also include a spring seat 430 for matching the spring 330, and the spring seat 430 is arranged between the sealing gasket 420 and the spring 330, and is used to make the spring 330 installed more stably.

[0045] Please see attached Figure 3As a specific embodiment of the present invention, the shell 100 may include an upper shell 101 and a lower shell 102, and the flexible diaphragm 200 is arranged between the upper shell 101 and the lower shell 102. The upper shell 101 and the flexible diaphragm 200 enclose a pressure chamber 110, and the lower shell 102 and the flexible diaphragm 200 enclose a piston chamber 120. Among them, the upper shell 101 and the lower shell 102 are sealed after the flexible diaphragm 200 is flanged and riveted. Among them, the gas nozzle 103 is riveted to the side wall of the upper shell 101 and is connected to the pressure chamber 110. Preferably, the top of the upper shell 101 body 100 is recessed toward the flexible diaphragm 200. So that the volume of the pressure chamber 110 becomes smaller, and when the same volume of gas is introduced, the flexible diaphragm 200 is deformed to a greater extent.

[0046] Please see attached Figure 4 As a preferred embodiment of the present invention, a T-shaped connecting portion may be provided at one end of the cable 340, and a T-shaped slot 321 cooperating with the T-shaped connecting portion may be provided on the connecting seat 320. The T-shaped connecting portion of the cable 340 is inserted into the T-shaped slot 321 of the connecting seat 320. The connecting seat 320 may be fixed to the inner piston shell 310 by a gasket, and specifically may be fixed to the inner piston shell 310 by riveting a gasket 323. Furthermore, a positioning pin hole 322 is also provided on the T-shaped slot 321, and the T-shaped connecting portion is limited in the T-shaped slot 321 by a pin, so as to facilitate assembly.

[0047] In addition, the present invention further provides a turbocharger, which includes a turbocharger body and the pneumatic actuator as described above, wherein a cable of the pneumatic actuator is connected to an air release valve assembly of the turbocharger body.

[0048] The turbocharger of the present application adopts the above-mentioned pneumatic actuator, which includes a housing, a flexible diaphragm and an actuator assembly. The flexible diaphragm is arranged in the housing and divides the space in the housing into a pressure chamber and a piston chamber. The pressurized gas is input into the pressure chamber through the air nozzle on the housing, pressing the flexible diaphragm to deform toward the piston chamber to drive the actuator. The actuator assembly of the pneumatic actuator is a flexible cable. When the actuator is working, the gas input between the actuator housing and the flexible diaphragm overcomes the spring force of the spring to push the inner piston shell to move, driving the cable output displacement, and the cable pulls the exhaust valve assembly to rotate, thereby controlling the turbocharger exhaust valve to open to an appropriate opening. Because the cable is a flexible part, it can be bent in space at will, so that the actuator can be flexibly arranged according to the installation needs, and is no longer limited by the position requirements of the exhaust valve assembly. It can not only reduce the layout space of the turbocharger, but also reduce the material cost of the actuator.

[0049] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pneumatic actuator, comprising a housing, a flexible diaphragm and an actuator assembly, wherein the flexible diaphragm is arranged in the housing and divides the space in the housing into a pressure chamber and a piston chamber, the housing is provided with an air nozzle connected to the pressure chamber, the actuator assembly is arranged in the piston chamber and cooperates with the flexible diaphragm, and is characterized in that: The actuator assembly includes an inner piston shell, a connecting seat, a spring and a cable; the connecting seat is arranged on the inner piston shell, one end of the spring abuts against the bottom of the shell, and the other end of the spring abuts against the inner piston shell to press the inner piston shell against the flexible diaphragm; a through hole is formed at the bottom of the shell, one end of the cable is fixed to the connecting seat, and the other end of the cable passes through the through hole to connect to the exhaust valve assembly of the turbocharger. The pneumatic actuator also includes a pad assembly and a spherical part. The pad assembly is arranged between the spring and the bottom of the shell. A spherical hole facing the through hole is formed in the pad assembly. The spherical part rotates with the spherical hole, and a limiting hole for the cable to pass through is provided on the spherical part. The pad assembly includes a support plate and a sealing gasket arranged on the support plate. The support plate is fixed to the bottom of the shell. The sealing gasket is made of rubber. The support plate and the sealing gasket are each provided with a hemispherical hole to enclose a spherical hole. The pad assembly is arranged between the spring and the bottom of the shell, and the spherical part is provided inside. The cable passes through the spherical part, and the spherical part can rotate following the deformation of the cable.

2. The pneumatic actuator according to claim 1, characterized in that: The backing plate assembly further comprises a spring seat for cooperating with the spring, wherein the spring seat is arranged between the sealing gasket and the spring.

3. The pneumatic actuator according to any one of claims 1 or 2, characterized in that: The housing comprises an upper shell and a lower shell, the flexible diaphragm is arranged between the upper shell and the lower shell, the upper shell and the flexible diaphragm enclose the pressure chamber, and the lower shell and the flexible diaphragm enclose the piston chamber.

4. The pneumatic actuator according to claim 3, characterized in that: The air nozzle is riveted to the side wall of the upper shell.

5. The pneumatic actuator according to claim 3, characterized in that: The top of the upper housing is recessed toward the flexible diaphragm.

6. The pneumatic actuator according to any one of claims 1 or 2, characterized in that: A T-shaped connecting portion is arranged at one end of the pull cable, and a T-shaped groove matching with the T-shaped connecting portion is arranged on the connecting seat.

7. The pneumatic actuator according to claim 6, characterized in that: The T-shaped slot is also provided with a positioning pin hole, and the T-shaped connecting part is limited in the T-shaped slot by a pin.

8. A turbocharger, characterized in that: The turbocharger comprises a supercharger body and a pneumatic actuator according to any one of claims 1 to 7, wherein a cable of the pneumatic actuator is connected to an air release valve assembly of the supercharger body.

Images