Valve and rocket engine

Abstract

The utility model belongs to the technical field of rocket engines, and particularly relates to a valve and a rocket engine. The valve comprises a valve body, a valve rod assembly, an elastic piece and a valve deck. The valve body is provided with a first air vent and a limiting channel in the longitudinal axis direction, the valve rod assembly is arranged in the limiting channel and comprises a valve rod, a valve element outer sleeve and valve elements, the valve elements are oppositely arranged at the ends, close to the elastic piece, of the two sides of the valve rod, and the valve element outer sleeve is arranged at the end, close to the elastic piece, of the valve rod and connected with the side wall of the valve rod through the valve elements; a medium inlet, a medium outlet and a second air vent are formed in the side wall of the valve body, and the medium inlet is connected with the medium outlet through a limiting channel; the valve body is provided with an exhaust channel, one end of the exhaust channel is connected with the second vent, and the other end is connected with the valve core jacket; the valve body is provided with two sealing cutting edges which are oppositely arranged, and the distance between the two sealing cutting edges, the maximum radial size of the valve rod and the distance between the two contact faces of the valve deck and the valve element outer sleeve are equal. The rocket engine comprises a valve.

Description

Technical Field

[0001] This application relates to the field of rocket engine technology, and in particular to a valve and a rocket engine. Background Technology

[0002] Valves are crucial components of rocket engines, playing a vital role in their initiation and shutdown. Currently, pneumatically controlled valves are often used to transport media in rocket engines. When the pressure of the medium flowing into the valve increases, the valve overcomes its elastic force to remain open; when the pressure decreases, the valve closes under the action of its elastic force. Clearly, the medium pressure directly affects the operating state of these valves; if the medium pressure is unstable, the valve cannot guarantee its correct operating condition. Utility Model Content

[0003] This application is made in view of the above-mentioned problems. This application provides a valve and a rocket engine.

[0004] According to one aspect of this application, a valve is provided, comprising:

[0005] The valve body comprises a valve stem assembly, an elastic element, and a valve cover. The valve body has a first vent and a limiting channel along its longitudinal axis. The first vent is located on one side of the limiting channel, and the other side of the limiting channel is connected to the valve cover via the elastic element. The valve stem assembly is located within the limiting channel and includes a valve stem, a valve core sleeve, and multiple valve cores. Each valve core is positioned opposite each other on both sides of the valve stem near the elastic element. The valve core sleeve is located at the end of the valve stem near the elastic element and is connected to the side wall of the valve stem via the valve cores. A medium inlet and a medium outlet are respectively provided on the side wall of the valve body near the valve cores and the side near the valve stem. The medium inlet is connected to the medium outlet via the limiting channel. A second vent is provided on the side wall of the valve body. An exhaust channel is provided along the longitudinal axis of the valve body. One end of the exhaust channel is connected to the second vent, and the other end is connected to the valve core sleeve. The valve body near the valve core has two oppositely positioned sealing edges. The distance between the two sealing edges, the maximum radial dimension of the valve stem, and the distance between the two contact surfaces of the valve cover and the valve core sleeve are all equal.

[0006] Compared with the prior art, the valve provided in this application includes a valve body, a valve stem assembly, an elastic element, and a valve cover. The valve body has a first vent and a limiting channel along its longitudinal axis. The first vent is located on one side of the limiting channel, and the other side of the limiting channel is connected to the valve cover via the elastic element. The valve stem assembly is disposed within the limiting channel and includes a valve stem, a valve core sleeve, and multiple valve cores. Each valve core is positioned opposite each other on both sides of the valve stem near the elastic element. The valve core sleeve is located at the end of the valve stem near the elastic element and is connected to the side wall of the valve stem via the valve cores. Furthermore, a medium inlet and a medium outlet are respectively provided on the side wall of the valve body near the valve core and the side near the valve stem. The medium inlet is connected to the medium outlet via the limiting channel. Therefore, if the valve needs to be in the open state, when gas is introduced into the limiting channel through the first vent, the gas pressure pushes the valve stem to move towards the elastic element, causing the valve cores on both sides of the valve stem to move until the valve opens. The medium then enters the limiting channel through the medium inlet. At this time, the valve core sleeve reduces the chance of corrosion by the medium. As the pressure of the medium entering the valve increases, the valve overcomes the elastic force to remain open. If the valve needs to be switched to the closed state, the gas supply to the first vent must be stopped. The remaining gas in the valve is then discharged to the atmosphere through the first vent. As the medium flows from the limiting channel to the medium outlet, the pressure of the medium inside the valve decreases, and the valve gradually closes under the action of the elastic force. Simultaneously, to ensure the valve's sealing performance, this application has two opposing sealing edges on the valve body near the valve core. When the valve is closed, the sealing edges contact the valve core to form a sealing surface. Furthermore, since this application provides sealing edges on the valve body, there is no need for a dedicated valve seat, thereby simplifying the valve structure, reducing valve weight, and lowering production costs. Furthermore, to reduce the probability of a vacuum cavity forming in the limiting channel when air is introduced into the first vent, a second vent is provided on the side wall of the valve body in this application. An exhaust channel is provided along the longitudinal axis of the valve body, with one end connected to the second vent and the other end connected to the valve core sleeve. This allows atmospheric air to be introduced into the valve, ensuring that the internal pressure of the valve remains balanced or nearly balanced with the external atmospheric pressure. It is evident that during the operation of the valve in this application, the medium pressure affects the limiting channel, the sealing edges, and the contact surface between the valve cover and the valve core sleeve. Therefore, this application limits the distance between the two sealing edges, the maximum radial dimension of the valve stem, and the distance between the two contact surfaces of the valve cover and the valve core sleeve to be equal. In this case, the area affected by the medium pressure at these locations is equal on both sides, but opposite in direction, thus canceling each other out. This makes the valve unaffected by the medium pressure; during operation, it is only affected by elastic force and friction between components. Therefore, even when the medium pressure inside the valve is unstable, the valve can maintain its correct operating state. It is evident that this valve has low requirements for the range of medium pressure fluctuations, has a wide range of applications, and exhibits good stability and reliability.

[0007] According to another aspect of this application, a rocket engine is provided, including the valve described above.

[0008] Compared with the prior art, the beneficial effects of the rocket engine provided in this application are the same as those of the valves mentioned above, and will not be repeated here.

[0009] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0010] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0011] Figure 1 A schematic diagram of the valve structure according to an embodiment of this application is shown.

[0012] Figure label:

[0013] 1-Valve body; 101-First vent; 1011-Assembly port; 102-Limiting channel; 103-Medium inlet; 104-Medium outlet; 105-Second vent; 107-Sealing edge; 2-Valve stem assembly; 201-Valve stem; 2011-First seal; 2012-Second seal; 2013-Exhaust channel; 202-Valve core sleeve; 2021-Opening; 203-Valve core; 3-Elastic element; 4-Valve cover; 401-Filter screen; and 5-Hollow fastener. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this application more apparent, exemplary embodiments according to this application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0015] Valves, as key components of rocket engines, play a crucial role in engine start-up and shutdown. In current rocket engines, the medium pressure has a direct and critical impact on the operating state of gas-controlled valves. If the medium pressure becomes unstable, the valves cannot maintain their correct operating state, potentially severely affecting the normal operation of the rocket engine.

[0016] To address the aforementioned issues, this application provides a valve that has low requirements for the range of medium pressure fluctuations, a wide range of applications, and good stability and reliability. Figure 1 A schematic diagram of the valve structure according to an embodiment of this application is shown. Figure 1 As shown, the valve includes a valve body 1, a valve stem assembly 2, an elastic element 3, and a valve cover 4. The valve body 1 has a first vent 101 and a limiting channel 102 in the longitudinal direction. The first vent 101 is located on one side of the limiting channel 102, and the other side of the limiting channel 102 is connected to the valve cover 4 through the elastic element 3. The valve stem assembly 2 is disposed in the limiting channel 102. The valve stem assembly 2 includes a valve stem 201, a valve core sleeve 202, and multiple valve cores 203. Each valve core 203 is disposed opposite to the ends of the valve stem 201 near the elastic element 3. The valve core sleeve 202 is disposed on the part of the valve stem 201 near the elastic element 3 and is connected to the side wall of the valve stem 201 through the valve core 203. The side wall of the valve body 1 is close to the valve core 201. A medium inlet 103 and a medium outlet 104 are respectively provided on one side of valve 3 and the side near valve stem 201. The medium inlet 103 is connected to the medium outlet 104 through a limiting channel 102. A second vent 105 is provided on the side wall of valve body 1. An exhaust channel 2013 is provided in the longitudinal direction of valve body 1. One end of the exhaust channel 2013 is connected to the second vent 105, and the other end of the exhaust channel 2013 is connected to the outer sleeve 202 of valve core 203. Two sealing blades 107 are arranged opposite to each other in the part of valve body 1 near valve core 203. The distance between the two sealing blades 107, the maximum radial dimension of valve stem 201, and the distance between the two contact surfaces of valve cover 4 and outer sleeve 202 of valve core 203 are all equal.

[0017] In practical implementation, if the valve needs to be in the open state, gas can be introduced into the limiting channel 102 through the first vent 101. Under the action of gas pressure, the valve stem 201 can be moved along the direction close to the elastic element 3, and the valve cores 203 on both sides of the valve stem 201 can be moved until the valve opens. The medium enters the limiting channel 102 through the medium inlet 103. At this time, the valve core 203 is covered by the outer sleeve 202, which can reduce the probability of the valve core 203 being corroded by the medium. As the pressure of the medium entering the valve increases, the valve overcomes the elastic force to maintain the open state. In this process, the valve in this embodiment can achieve the balance of gas pressure inside the valve through the second vent 105 and the exhaust channel 2013, minimizing the occurrence of a vacuum chamber. If it is necessary to change the valve to the closed state, the gas supply to the first vent 101 needs to be stopped. The remaining gas in the valve is discharged to the atmosphere through the first vent 101. Furthermore, as the medium flows from the limiting channel 102 to the medium outlet 104, the pressure of the medium inside the valve decreases, and the valve will gradually close under the action of the elastic force. At this time, the sealing edge 107 in this embodiment contacts the valve core 203 to form a sealing surface and block the passage of the medium. It can be seen that during the operation of the valve in this application, the medium pressure affects the limiting channel 102, the sealing edge 107, and the contact surface between the valve cover 4 and the valve core 203 outer sleeve 202. Therefore, this application limits the distance between the two sealing edges 107, the maximum radial dimension of the valve stem 201, and the distance between the two contact surfaces of the valve cover 4 and the valve core 203 outer sleeve 202 to be equal. At this time, the area of ​​the medium pressure acting on the above-mentioned parts is equal on both sides and opposite in direction, thus canceling each other out. This makes the valve unaffected by the medium pressure. In other words, the valve in this application is only affected by elastic force and friction between components during operation. Therefore, even if the medium pressure inside the valve is unstable, the valve can still maintain a correct operating state.

[0018] For example, such as Figure 1 As shown, in this embodiment, the part of the first vent 101 that contacts the valve stem 201 is provided with an assembly port 1011 to ensure a tight connection between the components in the valve stem 201 assembly 2. The shape of the assembly port 1011 can be triangular or hexagonal, and can be changed according to the shape of the assembly tool, which is not limited here.

[0019] In one alternative approach, such as Figure 1As shown in the embodiment of this application, the side wall of the valve stem 201 is further provided with a first sealing element 2011 and a second sealing element 2012. The first sealing element 2011 is located on the side wall of the valve stem 201 near the first vent 101, effectively preventing media leakage from the vicinity of the first vent 101 into the gap between the valve stem 201 and the valve body 1. In applications such as rocket engines where media control requirements are stringent, even a small leak can affect system performance. The second sealing element 2012 is located between the first sealing element 2011 and the media outlet 104, forming another layer of protection, further improving the valve's sealing performance, reducing the possibility of media leakage, and ensuring that the media flows along a predetermined path.

[0020] It is evident that the presence of the first seal 2011 and the second seal 2012 ensures the stability of the seal and reduces the probability of gas and medium crossflow.

[0021] For example, such as Figure 1 As shown, in this embodiment, the second vent 105 is located between the first seal 2011 and the second seal 2012. Therefore, when gas is introduced into the first vent 101, the valve stem 201 can be guaranteed to move normally under air pressure, reducing the probability that the valve stem 201 cannot be pushed by external force due to the formation of a vacuum cavity in the limiting channel 102.

[0022] For example, such as Figure 1 As shown, the valve in this embodiment also includes a hollow fastener 5. An opening 2021 for accommodating the hollow fastener 5 is provided on the side of the valve core 203 outer sleeve 202 near the elastic member 3. The valve core 203 outer sleeve 202 is connected to the exhaust channel 2013 via the hollow fastener 5. Therefore, this connection method makes the exhaust channel 2013 and the valve core 203 outer sleeve 202 form a stable integral structure. For example, during valve operation, when subjected to external forces such as vibration or pressure changes, the hollow fastener 5 ensures that the connection between the exhaust channel 2013 and the valve core 203 outer sleeve 202 will not loosen, ensuring the positional stability of the exhaust channel 2013 and maintaining the normal operation of the exhaust function. Furthermore, after atmospheric air enters the exhaust channel 2013, it can enter the elastic member 3 and the valve cover 4 connected to the elastic member 3 through the hollow fastener 5, ensuring sufficient gas flow space.

[0023] In one alternative approach, such as Figure 1 As shown in the embodiment of this application, the valve cover 4 near the elastic member 3 is provided with a filter screen 401, which can prevent small insects and other impurities from entering the valve and affecting the valve's performance.

[0024] In an alternative embodiment, the valve stem and valve core are sealed together, the valve core and the valve core outer sleeve are sealed together, and the valve core outer sleeve and valve cover are sealed together. This sealing can be achieved using one or more of O-rings and retaining rings, so that the valve maintains a good seal even under high medium pressure.

[0025] In one alternative embodiment, the sealing edge in this application is a metal sealing edge, and the valve core is a non-metallic valve core. The high strength and wear resistance of the metal sealing edge, combined with the corrosion resistance, low coefficient of friction, and elasticity of the non-metallic valve core, form a complementary sealing structure. During valve operation, the metal sealing edge ensures the integrity of the edge during long-term use, while the non-metallic valve core remains stable under different chemical media environments and improves the reliability and durability of the seal through its elasticity and low friction characteristics. The sealing contact between metal and non-metal materials is more effective than sealing contact between metal materials.

[0026] This application also provides a rocket engine including the aforementioned valve. Thanks to the advantages of the aforementioned valve, which has low requirements for the range of medium pressure fluctuations, a wider range of applications, better stability, and greater reliability, the stability and reliability of the rocket engine during operation can be greatly improved.

[0027] The above description is merely a specific embodiment of this application. Obviously, various modifications and combinations can be made without departing from the spirit and scope of this application. Accordingly, this specification and accompanying drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, the intent of this application includes these modifications and modifications. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the stated claims.

[0028] It should also be noted that in the apparatus and method of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0029] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0030] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A valve, characterized in that, include: The valve body comprises a valve body, a valve stem assembly, an elastic element, and a valve cover. The valve body has a first vent and a limiting channel along its longitudinal axis. The first vent is located on one side of the limiting channel, and the other side of the limiting channel is connected to the valve cover via the elastic element. The valve stem assembly is disposed within the limiting channel and includes a valve stem, a valve core sleeve, and multiple valve cores. Each valve core is positioned opposite to the valve stem near the elastic element on both sides. The valve core sleeve is disposed at the end of the valve stem near the elastic element and is connected to the side wall of the valve stem via the valve core. The side wall of the valve body is located near the valve... A medium inlet and a medium outlet are respectively provided on one side of the valve core and the side near the valve stem. The medium inlet is connected to the medium outlet through the limiting channel. A second vent is provided on the side wall of the valve body. An exhaust channel is provided in the longitudinal direction of the valve body. One end of the exhaust channel is connected to the second vent, and the other end of the exhaust channel is connected to the valve core sleeve. The part of the valve body near the valve core has two sealing edges arranged opposite to each other. The distance between the two sealing edges, the maximum radial dimension of the valve stem, and the distance between the two contact surfaces of the valve cover and the valve core sleeve are all equal.

2. The valve as described in claim 1, characterized in that, The valve stem is also provided with a first sealing element and a second sealing element on its side wall. The first sealing element is located on the side wall of the valve stem near the first vent, and the second sealing element is located between the first sealing element and the medium outlet.

3. The valve as described in claim 2, characterized in that, The second vent is located between the first seal and the second seal.

4. The valve as described in claim 1, characterized in that, The valve also includes a hollow fastener, and the valve core sleeve has an opening on the side near the elastic member to accommodate the hollow fastener. The valve core sleeve is connected to the exhaust channel through the hollow fastener.

5. The valve according to any one of claims 1 to 4, characterized in that, A filter screen is provided on the valve cover near the elastic element.

6. The valve according to any one of claims 1 to 4, characterized in that, The valve stem and valve core are sealed together, the valve core and valve core outer sleeve are sealed together, and the valve core outer sleeve and valve cover are sealed together.

7. The valve according to any one of claims 1 to 4, characterized in that, The sealing edge is a metal sealing edge, and the valve core is a non-metallic valve core.

8. A rocket engine, characterized in that, include: The valve according to any one of claims 1 to 7.

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