Pneumatic control valve and engine composite supercharging system

Abstract

The utility model discloses a pneumatic control valve and an engine composite supercharging system adopting the pneumatic control valve, the pneumatic control valve comprises a valve body, a valve cover, a valve core assembly and a spring, the valve core assembly comprises a valve rod, a valve core and a sealing ring, the pneumatic control valve is pre-tightened by the elastic force generated by the spring, and the sealing ring is used for sealing the valve rod. When the pressure difference between the air inlet and the air outlet of the valve is larger than the pre-tightening force of the spring, the valve element is opened, air enters from the air inlet and flows out from the air outlet, and the pneumatic control valve is in an open state; when the pressure difference between the air inlet and the air outlet of the valve is equal to or smaller than the pre-tightening force of the spring, the valve element is closed, and the pneumatic control valve is in a closed state. The pneumatic control valve is quick in response, easy to control, high in reliability, easy to install and maintain and low in price; according to the engine composite supercharging system adopting the pneumatic control valve, the transient response of an engine is improved under the condition that the low-speed and large-torque characteristics of the engine are met.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a pneumatic control valve and an engine composite supercharging system adopting the pneumatic control valve. Background Art

[0002] In automotive, boat and non-road engines, in order to improve the low-speed high torque and transient responsiveness of the engine, the engine compound supercharging system is often used. The engine compound supercharging system includes an engine, an intercooler, a turbocharger, an auxiliary supercharger (electric supercharger or mechanical supercharger), and a control valve. The arrangement of the control valve is used to achieve series supercharging, parallel supercharging or sequential supercharging of the turbocharger and the auxiliary supercharger. The control valve plays a vital role in the engine compound supercharging system. At present, most control valves use electric valves. The disadvantage is that the electric valve is expensive, the control is complex, the energy consumption is high, and the installation and maintenance are difficult. In particular, the response time is long, and it is difficult to meet the transient responsiveness requirements of the engine compound supercharging system. Therefore, it is urgent to provide a control valve that can respond quickly, has high reliability, and is easy to install and maintain. Summary of the invention

[0003] In view of this, the purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a pneumatic control valve that can respond quickly, has high reliability, and is easy to install and maintain.

[0004] Based on the same technical concept, the utility model also provides an engine compound supercharging system using the pneumatic control valve.

[0005] In order to solve the above-mentioned technical problems regarding pneumatic control valves, the technical solution of the utility model is: a pneumatic control valve, the pneumatic control valve comprising: a shell, a valve core assembly and a spring arranged inside the shell, the shell being provided with a coaxial air inlet and an air outlet, the shell comprising a valve body and a valve cover fixedly connected together, a valve seat being arranged inside the valve body; the valve core assembly comprising a valve stem and a valve core arranged at one end of the valve stem, the valve core being used to open or close the air inlet, and the other end of the valve stem being slidably arranged on the valve seat; the spring being sleeved on the valve stem, one end of the spring being against the valve seat, and the other end being against the valve core.

[0006] The following are several further improvements to the pneumatic control valve of the utility model:

[0007] Wherein, the air inlet is arranged on the valve cover, the air outlet is arranged on the valve body, and the valve body and the valve cover are fixedly connected by friction welding.

[0008] The valve seat comprises an integrally arranged seat portion and a tube portion, one end of the spring is sleeved on the tube portion and abuts against the seat portion; a guide sleeve is arranged inside the tube portion, and the other end of the valve stem is slidably matched with the guide sleeve.

[0009] The other end of the valve stem extends out of the valve seat, and a limiting pin is arranged at the end.

[0010] The seat is in the shape of a hemispherical shell, and forms a streamlined air passage between the seat and the inner surface of the outer shell.

[0011] Wherein, the valve core is a conical valve core, the outer surface of the small end of the conical valve core is spherical, and the back of the conical valve core is hollow.

[0012] Wherein, an annular groove is arranged on the outer periphery of the large end of the conical valve core, and the valve core assembly also includes a sealing ring arranged in the annular groove.

[0013] Wherein, steel sleeves are arranged inside the air inlet and the air outlet.

[0014] Wherein, the outer shell surface is provided with reinforcing ribs.

[0015] In order to solve the above-mentioned technical problems regarding the engine compound supercharging system, the technical solution of the utility model is: an engine compound supercharging system, the engine compound supercharging system includes an engine, an intercooler, a turbocharger, an auxiliary supercharger and a control valve, the intercooler, the compressor of the turbocharger, the compressor of the auxiliary supercharger, and the control valve are all arranged on the intake pipe of the engine, the turbine of the turbocharger is arranged on the exhaust pipe of the engine, and the control valve is the pneumatic control valve of the utility model described above.

[0016] After adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0017] The pneumatic control valve of the utility model includes a valve core assembly and a spring placed inside a shell, the shell is provided with a coaxial air inlet and air outlet, including a valve body and a valve cover fixedly connected together, and a valve seat is provided inside the valve body; the valve core assembly includes a valve stem and a valve core arranged at one end of the valve stem for opening or closing the air inlet, and the other end of the valve stem is slidably arranged on the valve seat; the spring is sleeved on the valve stem, one end of the spring abuts against the valve seat, and the other end abuts against the valve core; the pneumatic control valve is pre-tightened by the elastic force generated by the spring, when the pressure difference between the air inlet and the air outlet is greater than the spring pre-tightening force, the valve core opens, gas enters from the air inlet, flows out from the air outlet, and the pneumatic control valve is in an open state; when the pressure difference between the air inlet and the air outlet is equal to or less than the spring pre-tightening force, the valve core is closed, and the pneumatic control valve is in a closed state. Compared with the electric valve, the pneumatic control valve of the utility model can respond quickly, is easy to control, has high reliability, is easy to install and maintain, and has a low price.

[0018] Since the engine compound supercharging system of the utility model adopts the pneumatic control valve of the utility model, it can respond quickly, is easy to control, and has high reliability. While meeting the low-speed and high-torque characteristics of the engine, the transient responsiveness of the engine is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the structure of the pneumatic control valve of the first embodiment of the utility model;

[0020] Figure 2 yes Figure 1 Schematic diagram of the appearance;

[0021] Figure 3 This is a schematic diagram of the engine compound supercharging system of the second embodiment of the utility model;

[0022] In the figure: 1. valve body; 11. air outlet; 12. valve seat; 121. seat portion; 122. pipe portion; 13. reinforcing rib; 2. valve cover; 21. air inlet; 3. valve core assembly; 31. valve stem; 311. limit pin; 32. valve core; 33. sealing ring; 4. spring; 5. guide sleeve; 6. steel sleeve; a. engine; b. intercooler; c. turbocharger; d. auxiliary supercharger; e. pneumatic control valve. DETAILED DESCRIPTION

[0023] The following is a non-limiting description of the embodiments of the present invention in further detail with reference to the accompanying drawings.

[0024] Embodiment 1

[0025] like Figure 1 As shown, the pneumatic control valve of the first embodiment of the utility model comprises: a shell formed by a valve body 1 and a valve cover 2 fixedly connected together, an air inlet 21 is arranged at one end of the shell, and an air outlet 11 coaxial with the air inlet 21 is arranged at the other end, and a valve core assembly 3 and a spring 4 are arranged inside the shell.

[0026] Specifically, the air inlet 21 is provided on the valve cover 2, and the air outlet 11 is provided on the valve body 1. The valve body 1 and the valve cover 2 are preferably fixedly connected by friction welding. By friction welding, the combination of the valve body 1 and the valve cover is stable and has good sealing performance.

[0027] Specifically, a valve seat 12 is integrally arranged inside the valve body 1, and the valve seat 12 is optimally designed to include an integrally arranged seat portion 121 and a tube portion 122. The seat portion 121 is optimally designed to be in the shape of a hemispherical shell, and a streamlined airway is formed between the seat portion 121 and the inner surface of the outer shell, which can ensure smooth airflow and reduce pressure loss inside the control valve. A guide sleeve 5 is arranged inside the tube portion 122, and the guide sleeve 5 is preferably a brass guide sleeve. The use of brass material can reduce the friction of the sliding fit and enhance stability.

[0028] The valve core assembly 3 includes a valve stem 31, a valve core 32 disposed at one end of the valve stem 31, and a sealing ring 33 (preferably an O-ring) sleeved on the valve core 32. The valve core 32 is used to open or close the air inlet 21. The other end of the valve stem 31 is slidably matched with the guide sleeve 5 in the valve seat 12, and the end of the valve stem 31 extends out of the valve seat 12, and a limit pin 311 is provided at its end.

[0029] The spring 4 is sleeved on the valve stem 31 and the tube portion 122 , one end of the spring 4 abuts against the seat portion 121 of the valve seat 12 , and the other end abuts against the valve core 32 .

[0030] The valve core 32 is optimally designed as a conical valve core, the outer surface of the small end of the conical valve core is spherical, and the back of the conical valve core is hollow. The valve core 32 adopts a ball-head conical design, which can reduce airflow resistance and pressure loss. The back of the valve core 32 is designed as a conical blind hole, which can reduce the mass of the valve core 32 itself and reduce the influence of the inertia of the valve core 32 itself on the pressure. An annular groove is provided on the outer periphery of the large end of the conical valve core 32, and the sealing ring 33 is provided in the annular groove.

[0031] In order to meet the requirements of lightweight pneumatic control valves, the valve body 1, the valve cover 2, and the valve core 32 are preferably made of lightweight materials, such as plastic, rubber, carbon fiber and other heat-resistant lightweight materials.

[0032] Among them, steel sleeves 6 are arranged at the air inlet 21 of the valve cover 2 and the air outlet 11 of the valve body 1. Such arrangement can prevent the air inlet 21 and the air outlet 11 from being crushed or deformed during the assembly process when connected with external pipelines.

[0033] like Figure 2 As shown, the outer shell surface is provided with reinforcing ribs 13, which can reduce its own weight and increase the outer shell strength.

[0034] The pneumatic control valve of this embodiment is provided with an air inlet 21 and an air outlet 11. The internal air flow can only be Figure 1The air flows in one direction as indicated by the arrow. The pneumatic control valve is pre-tightened by the elastic force generated by the spring 4 and sealed by a sealing ring. The pre-tightening force is adjusted by the spring. When the pressure difference between the air inlet 21 and the air outlet 11 is greater than the pre-tightening force of the spring 4, the valve core 32 opens, the gas enters from the air inlet 21, and flows out from the air outlet 11, and the pneumatic control valve is in an open state; when the pressure difference between the air inlet 21 and the air outlet 11 is equal to or less than the pre-tightening force of the spring 4, the air pressure and the axial force of the spring 4 act together on the valve core 32, pushing the valve core 32 to cooperate with the valve cover 2, squeezing the sealing ring 33, the valve core 32 is closed, and the pneumatic control valve is in a closed state. The structure has good sealing performance and can effectively prevent the airflow from reversing. Compared with the electric valve, the pneumatic control valve of the utility model can respond quickly, is easy to control, has high reliability, is easy to install and maintain, and has a low price.

[0035] Embodiment 2

[0036] like Figure 3 As shown, the engine compound supercharging system of the second embodiment of the utility model comprises: an engine a, an intercooler b, a turbocharger c, an auxiliary supercharger d and a control valve, and the control valve adopts the pneumatic control valve e of the utility model described above. Among them, the intercooler b, the compressor of the turbocharger c, the compressor of the auxiliary supercharger d, and the pneumatic control valve e are all arranged on the intake pipe of the engine a, and the turbine of the turbocharger c is arranged on the exhaust pipe of the engine a. The structure and working principle of the engine compound supercharging system are well known to those skilled in the art, and will not be described in detail here. Since the engine compound supercharging system of the utility model adopts the pneumatic control valve of the utility model, it can respond quickly, is easy to control, and has high reliability. Under the condition of meeting the low-speed and high-torque characteristics of the engine, the transient responsiveness of the engine is improved.

[0037] The above description is an example of a preferred embodiment of the present invention, and the parts not described in detail are all known technologies in the art. The protection scope of the present invention is based on the content of the claims, and any equivalent changes based on the technical inspiration of the present invention are within the protection scope of the present invention.

Claims

1. A pneumatic control valve, comprising: A housing, a valve core assembly and a spring arranged inside the housing, characterized in that: The housing is provided with a coaxial air inlet and an air outlet, the housing comprises a valve body and a valve cover fixedly connected together, and a valve seat is provided inside the valve body; The valve core assembly comprises a valve stem and a valve core arranged at one end of the valve stem, the valve core is used to open or close the air inlet, and the other end of the valve stem is slidably arranged on the valve seat; The spring is sleeved on the valve stem, one end of the spring abuts against the valve seat, and the other end abuts against the valve core.

2. The pneumatic control valve according to claim 1, characterized in that: The air inlet is arranged on the valve cover, the air outlet is arranged on the valve body, and the valve body and the valve cover are fixedly connected by friction welding.

3. The pneumatic control valve according to claim 1, characterized in that: The valve seat comprises a seat portion and a tube portion which are integrally arranged. One end of the spring is sleeved on the tube portion and abuts against the seat portion. A guide sleeve is arranged inside the tube portion, and the other end of the valve stem is slidably matched with the guide sleeve.

4. The pneumatic control valve according to claim 3, characterized in that: The other end of the valve stem extends out of the valve seat, and a limiting pin is arranged at the end thereof.

5. The pneumatic control valve according to claim 3, characterized in that: The seat is in a hemispherical shell shape, and forms a streamlined air passage between the seat and the inner surface of the outer shell.

6. The pneumatic control valve according to claim 1, characterized in that: The valve core is a conical valve core, the outer surface of the small end of the conical valve core is spherical, and the back of the conical valve core is hollow.

7. The pneumatic control valve according to claim 6, characterized in that: An annular groove is arranged on the outer periphery of the large end of the conical valve core, and the valve core assembly further comprises a sealing ring arranged in the annular groove.

8. The pneumatic control valve according to claim 1, characterized in that: Steel sleeves are arranged inside the air inlet and the air outlet.

9. The pneumatic control valve according to claim 1, characterized in that: The surface of the shell is provided with reinforcing ribs.

10. An engine compound supercharging system, the engine compound supercharging system comprising: An engine, an intercooler, a turbocharger, an auxiliary supercharger and a control valve, wherein the intercooler, the compressor of the turbocharger, the compressor of the auxiliary supercharger and the control valve are all arranged on the intake pipe of the engine, and the turbine of the turbocharger is arranged on the exhaust pipe of the engine, characterized in that the control valve is a pneumatic control valve as described in any one of claims 1 to 9.

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