Pneumatic control valve for liquid rocket engine
By designing a pneumatic control valve for liquid rocket engines, it adopts a structure of a shell, valve core, spring and unloading ring, and enhancing the sealing of the valve core through a piping locking process, the problem that the control valve in the prior art is difficult to stabilize the supply of kerosene in the generator under a high pressure environment, and achieves higher sealing and structural strength.
Patent Information
- Application Number
- CN202421959923.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-08-13
AI Technical Summary
In the existing liquid rocket engines, it is difficult for the control valve to stabilize the supply of kerosene in a high-pressure environment, and the valve core is insufficient, causing the plastic ring to fall off.
A pneumatic control valve for liquid rocket engines is designed, and the structure of a shell, valve core, spring and unloading ring is adopted. The first O-ring, the second O-ring and the retaining ring are arranged to ensure sealing and strength. The valve core base and plastic ring are connected more firmly through the piping locking process.
The supply of kerosene for the generator is achieved in a stable control environment under a high pressure environment, which enhances the sealing of the valve core and the structural strength, prevents the plastic ring from falling off, and improves the overall working reliability.
Smart Images
Figure CN222836319U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid rocket engines, in particular to a pneumatic control valve for liquid rocket engines. Background Art
[0002] The valve is one of the important components in the fluid piping system. Its main function is to open and close the passage, change direction, adjust the flow and pressure, and protect the safety of the system. In liquid rocket engines, it is widely used in propellant delivery systems and other gas supply systems.
[0003] The control valve is installed in the generator kerosene supply line to control the supply of generator kerosene. When the engine is started, the control port of the control valve is ventilated to open the valve core, and the inlet and outlet are connected. During the operation of the engine, the control port maintains ventilation. During the engine shutdown stage, the control port is vented and the valve core is closed. The valve is provided with a blow-off port, which is connected to the outlet.
[0004] In view of the above situation, the utility model provides a pneumatic control valve for a liquid rocket engine, which can open the valve core through ventilation at the control port so that the inlet and the outlet are connected, and is a valve device for supplying kerosene to the generator. Utility Model Content
[0005] In order to solve the above technical problems, the utility model aims to provide a pneumatic control valve for a liquid rocket engine.
[0006] The purpose of this utility model is achieved through the following technical solutions:
[0007] Provided is a pneumatic control valve for a liquid rocket engine, comprising a housing, a valve core, a spring and a relief ring, wherein the valve core is arranged in the housing, and the spring is arranged between the valve core and the relief ring; a first O-ring is arranged between the housing and the valve core, and a second O-ring is also arranged between the valve core and the relief ring.
[0008] Preferably, the first O-ring is disposed around the outer circumference of the valve core, and the second O-ring is disposed around the outer circumference of the unloading ring.
[0009] Furthermore, a boss is provided in the shell, and the boss is sealed and connected to the valve core.
[0010] Furthermore, the valve core comprises a valve core base, a plastic ring and a first pressure ring, the plastic ring is located between the valve core base and the first pressure ring, and the plastic ring is sealingly connected to the boss.
[0011] Furthermore, an outlet and a blow-off port are provided in the middle of the shell; and the valve core is located between the outlet and the blow-off port.
[0012] Preferably, the outlet and the blow-off port are used to remove impurities in the shell.
[0013] Furthermore, an inlet is provided at the top of the shell, and a control port is provided at the bottom of the shell.
[0014] Preferably, the control port is used to pass the control air into the housing.
[0015] Furthermore, the first O-ring is arranged between the upper part of the valve core and the housing, and a third O-ring is also arranged between the middle part of the valve core and the housing.
[0016] Preferably, the first O-ring is arranged around the outer periphery of the upper portion of the valve core, and the third O-ring is arranged around the outer periphery of the middle portion of the valve core.
[0017] Furthermore, the pneumatic control valve for the liquid rocket engine also includes a first retaining ring, a second retaining ring and a third retaining ring. The first retaining ring is arranged on the upper and lower sides of the first O-ring, the second retaining ring is arranged on the lower side of the second O-ring, and the third retaining ring is arranged on the lower side of the third O-ring.
[0018] Furthermore, an exhaust port is provided at the bottom of the shell, and a plugging cover is embedded in the exhaust port.
[0019] Furthermore, the blocking cover is connected to the shell through threads.
[0020] Preferably, the threaded connection between the plugging cover and the shell is also provided with an anaerobic adhesive layer.
[0021] Furthermore, the pneumatic control valve for the liquid rocket engine also includes a filter screen and a second pressure ring, and the filter screen is arranged between the plug cover and the second pressure ring.
[0022] The beneficial effects compared with the prior art are:
[0023] 1) Pneumatic control valve for liquid rocket engine, the overall structural characteristics meet the requirements of valve strength, rigidity and working conditions, and can be stably used for the supply of generator kerosene;
[0024] 2) The pneumatic control valve for liquid rocket engines is equipped with a unloading structure (unloading ring), which can reduce the force of the inlet pressure of the shell on the valve core. The spring structure is compact and has good physical protection function for various components;
[0025] 3) The valve core includes a valve core base, a plastic ring and a first pressure ring. The arrangement of this structure can prevent the plastic ring from falling off. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0027] Figure 1 A cross-sectional view of a pneumatic control valve for a liquid rocket engine when the valve core provided by an embodiment of the utility model is in a closed position;
[0028] Figure 2 for Figure 1 Section along BB direction;
[0029] Figure 3 A cross-sectional view of a pneumatic control valve for a liquid rocket engine when the valve core is in an open position provided by an embodiment of the utility model;
[0030] Figure 4 A side view of a pneumatic control valve for a liquid rocket engine provided by an embodiment of the utility model;
[0031] Figure 5 A schematic diagram of the structure of the connection between the valve core and the boss of the pneumatic control valve for a liquid rocket engine provided by an embodiment of the utility model;
[0032] Figure 6 A schematic structural diagram of the connection between the plug cover and the second pressure ring of a pneumatic control valve for a liquid rocket engine provided in an embodiment of the utility model.
[0033] 1-housing; 2-valve core; 3-spring; 4-unloading ring; 5-first O-ring; 6-second O-ring; 7-inlet; 8-control port; 9-outlet; 10-blowing port; 11-third O-ring; 12-first retaining ring; 13-second retaining ring; 14-third retaining ring; 15-boss; 16-valve core base; 17-plastic ring; 18-first pressure ring; 19-exhaust port; 20-blocking cover; 21-filter screen; 22-second pressure ring. DETAILED DESCRIPTION
[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0035] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.
[0036] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.
[0037] It should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0038] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.
[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] Example
[0041] See also Figure 1-Figure 6The pneumatic control valve for liquid rocket engine shown in the figure comprises a housing 1, a valve core 2, a spring 3 and a relief ring 4. The valve core 2 is arranged in the housing 1, and the spring 3 is arranged between the valve core 2 and the relief ring 4; a first O-ring 5 is arranged between the housing 1 and the valve core 2, and a second O-ring 6 is also arranged between the valve core 2 and the relief ring 4. An inlet 7 is arranged at the top of the housing 1, and a control port 8 is arranged at the lower part of the housing 1. The control port 8 is used to pass the control gas into the housing 1. An outlet 9 and a blow-off port 10 are arranged at the middle part of the housing 1; the valve core 2 is located between the outlet 9 and the blow-off port 10. The outlet 9 and the blow-off port 10 are used to remove impurities in the housing 1. In addition, the function of the relief ring 4 is to make the load on the valve core 2 approach or reach self-balance, reduce the force of the pressure of the inlet 7 of the housing 1 on the valve core 2, and the spring 3 has a compact structure and has a good physical protection function for each component.
[0042] The first O-ring 5 is arranged around the outer periphery of the valve core 2, and the second O-ring 6 is arranged around the outer periphery of the unloading ring 4. The first O-ring 5 is arranged between the upper part of the valve core 2 and the housing 1, and a third O-ring 11 is also arranged between the middle part of the valve core 2 and the housing 1. In this embodiment, the first O-ring 5 is arranged around the outer periphery of the upper part of the valve core 2, and the third O-ring 11 is arranged around the outer periphery of the middle part of the valve core 2. It also includes a first retaining ring 12, a second retaining ring 13 and a third retaining ring 14. The setting position of the retaining ring is set by whether the O-ring is subjected to unidirectional pressure or bidirectional pressure. If it is subjected to unidirectional pressure, one retaining ring is used on the bearing side of the O-ring, and if it is subjected to bidirectional pressure, two retaining rings are used. In this embodiment, the first retaining ring 12 is arranged on the upper and lower sides of the first O-ring 5, the second retaining ring 13 is arranged on the lower side of the second O-ring 6, and the third retaining ring 14 is arranged on the lower side of the third O-ring 11. The first O-ring 5, the third O-ring 11, the first retaining ring 12, and the third retaining ring 14 can ensure the sealing between the housing 1 and the valve core 2, and the second O-ring 6 and the second retaining ring 13 can ensure the sealing between the valve core 2 and the unloading ring 4. The retaining ring is used to prevent the O-ring from "gap bite" and the working pressure can be greatly improved. In this embodiment, during assembly, a layer of chemical-resistant medium grease can be applied to the relative motion surface of the valve core 2 and the unloading ring 4, the outer periphery of the first O-ring 5, the second O-ring 6, the third O-ring 11, the first retaining ring 12, the second retaining ring 13, and the third retaining ring 14, and the first and second end surfaces of the spring 3 to reduce the friction between the components and make the movement between the components more flexible.
[0043] The shell 1 is provided with a boss 15, and the boss 15 is sealed to the valve core 2. The valve core 2 includes a valve core base 16, a plastic ring 17 and a first pressure ring 18, and the plastic ring 17 is located between the valve core base 16 and the first pressure ring 18, and the plastic ring 17 is sealed to the boss 15. In this embodiment, the valve core base 16 is embedded with non-metallic materials (polytetrafluoroethylene, nylon), specifically polytetrafluoroethylene material, and the non-metallic material in the valve core 2 forms a soft seal with the boss 15 (specifically metal material) of the shell 1 after being compressed. In this embodiment, the valve core base 16 is pressed by the rolling locking process to press the first pressure ring 18, and then press the plastic ring 17 to achieve sealing with the boss 15 of the shell 1. This structure can prevent the situation in which the metal and non-metal are not firmly bonded during use, thereby causing the plastic ring 17 to fall off. The advantages of this structure are good sealing performance and simple structure. The rolling and locking process method makes the valve core base 16, the plastic ring 17 and the first pressure ring 19 more firmly connected.
[0044] The bottom of the shell 1 is provided with an exhaust port 19, and a plugging cover 20 is embedded in the exhaust port 19, and the plugging cover 20 is connected to the shell 1 by threads. In this embodiment, the threaded connection between the plugging cover 20 and the shell 1 is also provided with an anaerobic adhesive layer, and the anaerobic adhesive layer is used to fill the gap in the threaded joint and provide a tightening and sealing effect. It also includes a filter screen 21 and a second pressure ring 22, and the filter screen 21 is arranged between the plugging cover 20 and the second pressure ring 22. In this embodiment, the plugging cover 20 presses the second pressure ring 22 by a rolling locking process, and then presses the filter screen 21 to prevent the filter screen 21 from falling off. The function of the filter screen 21 is to filter out particles of a certain specification in the medium as needed, that is, to purify the medium and ensure the normal operation of the pneumatic control valve.
[0045] The working principle of the pneumatic control valve for liquid rocket engines is as follows:
[0046] The pneumatic control valve for liquid rocket engines is installed in the generator kerosene supply path of the liquid rocket engine to control the supply of generator kerosene. When the control port 8 does not pass the control air, the valve core 2 is in the closed position under the action of the spring 3. When the control port 8 supplies the control air, the medium pressure pushes the valve core 2 to move downward, compresses the spring 3 and then opens the valve core 2. Here, the valve core 2 is in the open position, the inlet 7 is connected with the outlet 9, and the blow-off port 10 is blocked. During the operation of the engine, the control port 8 maintains ventilation to ensure the supply of generator kerosene. When the engine stops working, the control port 8 is evacuated, the valve core 2 is closed, and the blow-off port 10 is unblocked. At this time, the blow-off port 10 is connected with the outlet 9, and impurities in the housing 1 can be removed, such as particles in the medium.
[0047] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A pneumatic control valve for a liquid rocket engine, characterized in that: It includes a housing, a valve core, a spring and a relief ring. The valve core is arranged in the housing, and the spring is arranged between the valve core and the relief ring. A first O-ring is arranged between the housing and the valve core, and a second O-ring is arranged between the valve core and the relief ring.
2. The pneumatic control valve for a liquid rocket engine according to claim 1, characterized in that: A boss is arranged in the shell, and the boss is sealed and connected to the valve core.
3. The pneumatic control valve for a liquid rocket engine according to claim 2, characterized in that: The valve core comprises a valve core base, a plastic ring and a first pressure ring. The plastic ring is located between the valve core base and the first pressure ring, and the plastic ring is sealed and connected to the boss.
4. The pneumatic control valve for a liquid rocket engine according to claim 1, characterized in that: An outlet and a blow-off port are arranged in the middle of the shell; and the valve core is located between the outlet and the blow-off port.
5. The pneumatic control valve for a liquid rocket engine according to claim 1, characterized in that: The top of the shell is provided with an inlet, and the lower part of the shell is provided with a control port.
6. The pneumatic control valve for a liquid rocket engine according to claim 1, characterized in that: The first O-ring is arranged between the upper part of the valve core and the housing, and a third O-ring is also arranged between the middle part of the valve core and the housing.
7. The pneumatic control valve for a liquid rocket engine according to claim 6, characterized in that: It also includes a first retaining ring, a second retaining ring and a third retaining ring. The first retaining ring is arranged on the upper and lower sides of the first O-ring, the second retaining ring is arranged on the lower side of the second O-ring, and the third retaining ring is arranged on the lower side of the third O-ring.
8. The pneumatic control valve for a liquid rocket engine according to claim 1, characterized in that: An exhaust port is arranged at the bottom of the shell, and a plugging cover is embedded in the exhaust port.
9. The pneumatic control valve for a liquid rocket engine according to claim 8, characterized in that: The blocking cover is connected to the shell through threads.
10. The pneumatic control valve for a liquid rocket engine according to claim 9, characterized in that: It also includes a filter screen and a second pressure ring, wherein the filter screen is arranged between the plugging cover and the second pressure ring.