Electric propulsion gas supply combination valve

Abstract

The utility model relates to the technical field of space propulsion, in particular to an electric propulsion gas supply combination valve. The electric propulsion air supply combination valve comprises a shell, an inflation valve, an electromagnetic valve and a pressure reducing valve. An inlet is formed in one side of the shell, an outlet is formed in the other side of the shell, an inflation hole is formed in the side, close to the inlet, of the shell, a control hole is formed in the side, perpendicular to the inflation hole, of the shell, a pressure reduction hole is formed in the other side, parallel to one side of the control hole, of the shell, and the pressure reduction hole and the control hole are staggered in the spatial position. A plurality of sections of circulating hole channels are formed in the shell, and the inlet, the inflating hole, the control hole and the outlet are sequentially communicated through the plurality of sections of circulating hole channels; the inflation valve is installed in the inflation hole, close to the inlet and used for controlling gas to flow to the inlet or the decompression hole. According to the highly-integrated electric propulsion gas supply combination valve, the development requirements that a gas supply device is simple in pipeline, small in size, light in weight, easy to replace components and high in reliability are met.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of space propulsion technology, and in particular to an electric propulsion air supply combination valve. Background Art

[0002] Space propulsion technology is a technology that converts chemical energy, electrical energy and other energy into kinetic energy for propellant injection. It plays an important role in manned space flight, artificial satellites, launch vehicles, deep space probes, defense systems, etc. Space propulsion ensures the reliable implementation of manned space projects, realizes the long-term orbit of artificial satellites, ensures the precise orbital entry of launch vehicles, assists the interstellar navigation of probes, and improves the efficient maneuverability of defense systems. Electric propulsion is an advanced space propulsion technology that generates thrust by accelerating the ejection of ionized working fluids and converts electrical energy into kinetic energy for spacecraft. Hall electric propulsion technology is the most mainstream development direction at present. This propulsion technology usually uses hydrogen, xenon, and argon as propellants, but these propellants do not generate power through combustion. The principle of Hall propulsion is to accelerate ions using the potential between the negatively charged plasma of the cylindrical anode and cathode. The propellant is introduced near the anode, and after ionization, it flows to the cathode under the restriction of the magnetic field and is accelerated by it. When leaving the cathode, the ions will carry electrons, and after neutralization, they will leave the propeller at high speed. The specific impulse of grid ion thrusters is extremely large, reaching tens of thousands of seconds, while the thrust of Hall thrusters is too small, generally at the micronewton level, and can only be used to maintain the orbit or accelerate satellites or probes.

[0003] The air supply module is a key subsystem of the Hall electric thruster. Its main working purpose is to reduce the propellant to a certain pressure and the flow rate to a certain range, so as to facilitate the proportional valve to control the flow rate. In recent years, the development trend of Internet satellites is small size and large number of networks, which promotes the development of propulsion systems towards small size, light weight and low cost. The existing air supply module uses a single valve connected by pipelines. There are many and complex system pipelines, large size, heavy weight, difficult component replacement and low reliability, which cannot meet the development needs. Utility Model Content

[0004] The purpose of the implementation mode of the present application is to provide an electric propulsion air supply combination valve, which can meet the development needs of the electric propulsion air supply combination valve with simple pipeline, small size, light weight and low cost.

[0005] In order to solve the above technical problems, the embodiment of the present application provides an electric propulsion air supply combination valve, which includes a shell, an air charging valve, an electromagnetic valve and a pressure reducing valve. An inlet is provided on one side of the shell, and an outlet is provided on the other side of the shell. An air charging hole is provided on the side of the shell close to the inlet, a control hole is provided on the side of the shell perpendicular to the air charging hole, and a pressure reducing hole is provided on the other side of the shell parallel to the control hole. The pressure reducing hole and the control hole are staggered in space. Multiple sections of flow channels are provided inside the shell, and the multiple sections of flow channels connect the inlet, the air charging hole, the control hole and the outlet in sequence; the air charging valve is installed in the air charging hole and close to the inlet, and is used to control the gas to flow to the inlet or the pressure reducing hole; the electromagnetic valve is installed in the control hole, and is used to control the channel for the gas to flow to the pressure reducing hole to be closed or opened; the pressure reducing valve is installed in the pressure reducing hole, and the gas is reduced to a preset pressure by the pressure reducing valve and then flows out from the outlet.

[0006] The embodiment of the present application provides an electric propulsion air supply combination valve, which integrates the charging valve, solenoid valve and pressure reducing valve into a shell having an inlet, a charging hole, a control hole, a pressure reducing hole, an outlet and multiple flow channels. After the gas enters the shell from the inlet, it passes through the charging valve, the solenoid valve and the pressure reducing valve through multiple flow channels. After reaching the preset pressure value, it flows out from the outlet and enters the downstream proportional valve for flow regulation. This highly integrated electric propulsion air supply combination valve ensures the development needs of the air supply device with simple pipelines, small size, light weight, easy replacement of components and high reliability.

[0007] In some embodiments, the pressure reducing valve includes a valve core and a valve seat arranged opposite to the valve core, the valve core includes a valve top close to the valve seat and a valve handle away from the valve seat, and the movement of the valve core away from or close to the valve seat controls the pressure reducing effect of the pressure reducing valve.

[0008] In some embodiments, a funnel hole and fine holes are sequentially arranged inside the valve seat along the gas flow direction, a first flow channel is connected between the funnel hole and the control hole, and an outlet of the fine hole faces the top of the valve top.

[0009] In some embodiments, the valve seat is conical at the outlet of the fine hole.

[0010] In some embodiments, a filter is disposed between the first flow channel and the funnel hole.

[0011] In some embodiments, the pressure reducing valve further includes a bushing arranged around the valve top and around the valve seat, the bushing, the valve seat and the valve top seal form a pressure reducing chamber, the pressure reducing chamber is connected to the pore, and a second flow channel is connected between the pressure reducing chamber and the outlet.

[0012] In some embodiments, the pressure reducing valve further includes an end cover located at the outermost side of the pressure reducing hole, a control chamber is arranged between the end cover and the valve handle, an auxiliary channel is arranged inside the valve core, a small hole is provided between one end of the auxiliary channel and the pressure reducing chamber, and the other end of the auxiliary channel is connected to the control chamber.

[0013] In some embodiments, a plurality of springs are disposed between the bushing and the valve top, and the springs and the pressure in the control chamber cooperate with each other to control the valve core to move away from or approach the valve seat.

[0014] In some embodiments, the housing is made in one piece by three-dimensional printing.

[0015] In some embodiments, the shell material is TC4 titanium alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 is a cross-sectional schematic diagram of an electric propulsion air supply combination valve provided in some embodiments of the present application;

[0018] Figure 2 It is a schematic diagram of a three-dimensional structure of an electric propulsion air supply combination valve housing inlet at the front side provided in some embodiments of the present application;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of an electric propulsion air supply combination valve housing inlet on the upper side provided in some embodiments of the present application;

[0020] Figure 4 It is a cross-sectional schematic diagram of a control valve in an electric propulsion air supply combination valve provided in some embodiments of the present application;

[0021] Figure 5 It is a front view of a housing at a control hole in an electric propulsion air supply combination valve provided in some embodiments of the present application;

[0022] Figure 6 The electric propulsion air supply combination valve provided in some embodiments of the present application Figure 5 Schematic diagram of the cross section at A-A'.

[0023] Explanation of the reference numerals: 11-housing; 111-inlet; 112-outlet; 113-inflating hole; 114-control hole; 115-pressure reducing hole; 116-circulation channel; 1161-first circulation channel; 1162-second circulation channel; 12-inflating valve; 13-solenoid valve; 14-pressure reducing valve; 141-valve core; 1411-valve top; 1412-valve handle; 1413-auxiliary channel; 1414-small hole; 142-valve seat; 1421-funnel hole; 1422-fine hole; 1423-filter; 143-bushing; 144-pressure reducing chamber; 145-end cover; 146-control chamber; 147-spring. DETAILED DESCRIPTION

[0024] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not constitute any limitation, and the various embodiments can be combined with each other and referenced to each other without contradiction.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0026] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0027] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0028] Space propulsion technology is a technology that converts chemical energy, electrical energy and other energy into kinetic energy for propellant injection. It plays an important role in manned space flight, artificial satellites, launch vehicles, deep space probes, defense systems, etc. Space propulsion ensures the reliable implementation of manned space projects, realizes the long-term orbit of artificial satellites, ensures the precise orbital entry of launch vehicles, assists the interstellar navigation of probes, and improves the efficient maneuverability of defense systems. Electric propulsion is an advanced space propulsion technology that generates thrust by accelerating the ejection of ionized working fluids and converts electrical energy into kinetic energy for spacecraft. Hall electric propulsion technology is the most mainstream development direction at present. This propulsion technology usually uses hydrogen, xenon, and argon as propellants, but these propellants do not generate power through combustion. The principle of Hall propulsion is to accelerate ions using the potential between the negatively charged plasma of the cylindrical anode and cathode. The propellant is introduced near the anode, and after ionization, it flows to the cathode under the restriction of the magnetic field and is accelerated by it. When leaving the cathode, the ions will carry electrons, and after neutralization, they will leave the propeller at high speed. The specific impulse of grid ion thrusters is extremely large, reaching tens of thousands of seconds, while the thrust of Hall thrusters is too small, generally at the micronewton level, and can only be used to maintain the orbit or accelerate satellites or probes.

[0029] The air supply module is a key subsystem of the Hall electric thruster. Its main working purpose is to reduce the propellant to a certain pressure and the flow rate to a certain range, so as to facilitate the proportional valve to control the flow rate. In recent years, low-orbit small satellites have flourished under the leadership of satellite Internet such as "Starlink" and "OneNet". Due to the limited mass, volume and power of micro-satellites, their wide application has put forward higher requirements for space power devices. Space power devices with small thrust, high specific impulse, light mass and small volume can better match the power requirements of micro-satellites. Compared with traditional chemical propulsion, electric propulsion has high specific impulse and requires less propellant mass under the same speed increment requirement. Among them, low-power Hall electric propulsion has a simple structure, smaller volume and mass, which can increase the load or save propellant for the system. It is currently widely used in the position keeping, drag compensation and deorbit missions of micro-satellites. For example, commercial aerospace companies such as Space Exploration Technologies Corporation (Space X) and OneNet have selected low-power Hall thrusters as space power for satellite constellations. With the expansion of the satellite constellation market and the advancement of technology, low-power Hall electric propulsion technology must be rapidly iterated and continuously upgraded.

[0030] In recent years, the development trend of Internet satellites is small size and large number of networks, which promotes the development of propulsion systems towards small size, light weight and low cost. The existing gas supply modules use separate valves and are connected by pipelines. There are many and complex system pipelines, large size, heavy weight, difficult component replacement and low reliability, which cannot meet the development needs.

[0031] Therefore, in order to realize the development needs of the electric propulsion air supply module, the pipeline is simple, the volume is small, the weight is light, the components are easy to replace, and the reliability is high. Some embodiments of the present application provide an electric propulsion air supply combination valve, which integrates the charging valve, the solenoid valve, and the pressure reducing valve on the shell by making a shell with an inlet, an air charging hole, a control hole, a pressure reducing hole, an outlet, and multiple flow channels. After the gas enters the shell from the inlet, it passes through the charging valve, the solenoid valve, and the pressure reducing valve through multiple flow channels. After reaching the preset pressure value, it flows out from the outlet and enters the downstream proportional valve for flow regulation. This highly integrated electric propulsion air supply combination valve ensures that the air supply device has a simple pipeline, a small volume, a light weight, the components are easy to replace, and the reliability is high.

[0032] Combine the following Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 An electric propulsion air supply combination valve provided in some embodiments of the present application is described.

[0033] like Figure 1 Figure 2 , Figure 3 As shown, an electric propulsion air supply combination valve provided in some embodiments of the present application includes a housing 11, an air charging valve 12, a solenoid valve 13 and a pressure reducing valve 14. An inlet 111 is provided on one side of the housing 11, an outlet 112 is provided on the other side of the housing 11 perpendicular to the inlet 111, an air charging hole 113 is provided on the other side of the housing 11 perpendicular to both the inlet 111 and the outlet 112, a control hole 114 is provided on the same side of the housing 11 as the outlet 112, a pressure reducing hole 115 is provided on the other side of the housing 11 parallel to the control hole 114, the pressure reducing hole 115 is staggered from the control hole 114 in space, and a plurality of flow channels 113 are provided inside the housing 11. 16, the multi-section flow channel 116 connects the inlet 111, the inflation hole 113, the control hole 114 and the outlet 112 in sequence; the inflation valve 12 is installed in the inflation hole 113 and close to the inlet 111, and is used to control the gas flow to the inlet 111 or the pressure reducing hole 115; the solenoid valve 13 is installed in the control hole 114, and is used to control the closing or opening of the channel for the gas flow to the pressure reducing hole 115; the pressure reducing valve 14 is installed in the pressure reducing hole 115, and the gas flows out from the outlet 112 after being reduced to a preset pressure by the pressure reducing valve 14.

[0034] It should be noted that if Figure 2As shown, the shell 11 is an irregularly shaped hollow box body formed in one piece, with six faces, a mounting hole on the bottom face and fixed on the designated mounting position of the satellite or spacecraft by screws and nuts, an inlet 111 is arranged on the front side of the shell 11, an air filling hole 113 is arranged on the upper side near the inlet 111, a control hole 114 is arranged on the right side near the inlet 111, an outlet 112 is arranged on the right side away from the control hole 114, a pressure reducing hole 115 is arranged on the left side opposite to the outlet 112, and the rear side is closed without any components installed. The inlet 111 of the shell 11 is externally connected to a high-pressure gas cylinder filled with nitrogen, helium, argon or krypton, and the outlet 112 of the shell 11 is connected to the proportional valve of the system for flow regulation. The inflation hole 113, the control hole 114 and the pressure reducing hole 115 are provided with threads or buckles for easy installation. The inflation valve 12, the solenoid valve 13 and the pressure reducing valve 14 can be installed in the corresponding installation holes by means of a plug-in installation method, and a sealing ring, a gasket or a sealing pad is used to seal well to ensure the sealing of the entire device. Different installation methods can be used according to the characteristics of different components. The multi-section flow channel 116 is located inside the shell 11 and is integrally formed during the manufacturing process of the shell 11. The flow channel 116 is used to circulate gas, and the gas is introduced from the inlet 111 into the inflation valve 12, the solenoid valve 13 and the pressure reducing valve 14 in turn. After reaching a preset pressure of 0.2±0.05MPa (megapascals) in the pressure reducing valve 14, it flows from the outlet 112 into the downstream proportional valve. The initial pressure of the gas is about 15MPa.

[0035] In addition, the inflation valve 12, the solenoid valve 13 and the pressure reducing valve 14 have different internal channels according to their different functions, control the opening and closing of different internal channels, and are connected with the flow channels 116 at different positions in the shell 11 to conduct gas. The inflation hole 113 is connected with the inlet 111, and the upstream high-pressure gas storage device is inflated or deflated through the inflation hole 113. When inflating, the solenoid valve 13 is closed, and the gas flows from the inflation valve 12 to the inlet 111, and then inflates the gas storage tank. When the pressure of the gas storage tank reaches a certain value, the inflation is stopped. When deflation, the solenoid valve 13 is also closed, and the gas flows from the inlet 111 to the inflation valve 12, and the gas in the gas storage tank is released. The inflation valve 12 can be used in conjunction with the inflation service valve to inflate and deflate the high-pressure gas storage device. The solenoid valve 13 controls the inflow of gas through a remote electromagnetic switch, and the pressure reducing valve 14 reduces the gas pressure to a preset range. The connecting positions of the inflation valve 12, the solenoid valve 13, the pressure reducing valve 14 and each flow channel 116 are provided with sealing elements to ensure the sealing of the entire device.

[0036] An electric propulsion air supply combination valve provided in an embodiment of the present application is manufactured by manufacturing a shell 11 having an inlet 111, an air filling hole 113, a control hole 114, a pressure reducing hole 115, an outlet 112, and a multi-section flow channel 116, and integrating the air filling valve 12, the solenoid valve 13, and the pressure reducing valve 14 on the shell 11. After the gas enters the shell 11 from the inlet 111, it passes through the air filling valve 12, the solenoid valve 13, and the pressure reducing valve 14 through the multi-section flow channel 116. After reaching the preset pressure value, it flows out from the outlet 112 and enters the downstream proportional valve for flow regulation. This highly integrated electric propulsion air supply combination valve ensures the development needs of the air supply device with simple pipelines, small size, light weight, easy replacement of components, and high reliability.

[0037] In some embodiments of the present application, the pressure reducing valve 14 includes a valve core 141 and a valve seat 142 arranged opposite to the valve core 141. The valve core 141 includes a valve top 1411 close to the valve seat 142 and a valve handle 1412 away from the valve seat 142. The movement of the valve core 141 relative to the valve seat 142 away from or close to control the pressure reducing effect of the pressure reducing valve 14.

[0038] It should be noted that the valve core 141 is set in the middle position of the pressure reducing valve 14, and the movement of the valve core 141 relative to the valve seat 142 can control the distance between the valve top 1411 and the valve seat 142, that is, the size of the opening can be controlled. According to the Bernoulli principle in fluid mechanics, when the flow is at equal height, the greater the flow rate, the smaller the pressure. Therefore, the larger the opening, the larger the gap between the valve top 1411 and the valve seat 142, the smaller the gas flow rate, and the greater the gas pressure; the smaller the opening, the smaller the gap between the valve top 1411 and the valve seat 142, the greater the gas flow rate, and the smaller the gas pressure. Therefore, the gas pressure in the pressure reducing valve 14 can be controlled by controlling the movement of the valve core 141 relative to the valve seat 142, thereby playing a role in reducing pressure.

[0039] In some embodiments of the present application, a funnel hole 1421 and a fine hole 1422 are sequentially arranged inside the valve seat 142 along the gas flow direction, a first flow channel 1161 is connected between the funnel hole 1421 and the control hole 114, and an outlet 112 of the fine hole 1422 faces the top of the valve top 1411.

[0040] It should be noted that the gas flows from the control valve to the funnel hole 1421 through the first flow channel 1161, and the aperture of the funnel hole 1421 becomes smaller and smaller until a thin hole 1422 with a stable aperture is formed. From the above analysis, it can be seen that this aperture feature from coarse to fine makes the gas pressure in the channel smaller and smaller. Until the gas flows from the thin hole 1422 to the valve top 1411, the pressure is further controlled under the condition of controlling the distance between the valve top 1411 and the thin hole 1422, so that the pressure is reduced to a suitable range.

[0041] In some embodiments of the present application, the valve seat 142 is in a cone shape at the outlet 112 of the fine hole 1422 .

[0042] That is, the valve seat 142 adjacent to the valve top 1411 is in the shape of a cone, so that the top of the cone is opposite to the valve top 1411, and the high-speed low-pressure gas flowing out of the pore 1422 is dispersed to both sides, so that it is always in a low-pressure state. A seal can be provided at the cone to isolate the high-pressure area of ​​the valve seat 142 from the low-pressure area of ​​the valve core 141 to ensure the sealing of the equipment.

[0043] In some embodiments of the present application, a filter 1423 is disposed between the first flow channel 1161 and the funnel hole 1421 .

[0044] It should be noted that the pressure reducing valve 14 is designed based on the Bernoulli principle in fluid mechanics. The internal channels of the pressure reducing valve 14 are getting thinner and thinner. In order to avoid the small holes 1414 being blocked, the gas needs to be filtered to prevent impurities from entering the channels of the pressure reducing valve 14.

[0045] In some embodiments of the present application, the pressure reducing valve 14 also includes a sleeve 143 arranged around the valve top 1411 and around the valve seat 142. The sleeve 143, the valve seat 142 and the valve top 1411 are sealed to form a pressure reducing chamber 144. The pressure reducing chamber 144 is connected to the pore 1422. A second flow channel 1162 is connected between the pressure reducing chamber 144 and the outlet 112.

[0046] It should be noted that if Figure 1 and Figure 6 As shown, the high-speed low-pressure gas flowing out of the fine hole 1422 is dispersed to both sides and temporarily stored in the decompression chamber 144. Subsequently, the stable low-pressure gas after decompression flows from the second flow channel 1162 to the outlet 112, and flows from the outlet 112 into the proportional valve downstream of the system.

[0047] In some embodiments of the present application, the pressure reducing valve 14 also includes an end cover 145 located at the outermost side of the pressure reducing hole 115, a control chamber 146 is arranged between the end cover 145 and the valve handle 1412, an auxiliary channel 1413 is arranged inside the valve core 141, a small hole 1414 is provided between one end of the auxiliary channel 1413 and the pressure reducing chamber 144, and the other end of the auxiliary channel 1413 is connected to the control chamber 146.

[0048] It should be noted that, during the installation process, the other components of the pressure reducing valve 14 are first installed and fixed to the appropriate position of the pressure reducing hole 115, wherein the bushing 143 is fixed in the wall of the pressure reducing hole 115, and the valve core 141 can move relative to the bushing 143. After the bushing 143, the valve seat 142, and the valve core 141 are completed, the end cover 145 is installed and sealed. The low-pressure gas in the pressure reducing chamber 144 can flow from the small hole 1414 along the auxiliary channel 1413 into the control chamber 146, so that the gas pressure in the control chamber 146 is basically consistent with that in the pressure reducing chamber 144.

[0049] In some embodiments of the present application, a plurality of springs 147 are disposed between the bushing 143 and the valve top 1411 , and the springs 147 and the pressure in the control chamber 146 cooperate with each other to control the valve core 141 to move away from or approach the valve seat 142 .

[0050] It should be noted that the spring 147 is usually in a compressed state, so that the valve top 1411 is always pushed away from the valve seat 142. When the valve core 141 is far away from the valve seat 142, the opening becomes larger. From the above analysis, it can be seen that the pressure in the pressure reducing chamber 144 also increases, and the pressure in the control chamber 146 also increases. The gas with increased pressure in the control chamber 146 will push the valve top 1411 closer to the valve seat 142, making the opening smaller. In this way, under the balance of the thrust of the spring 147 and the thrust of the gas in the control chamber 146, the valve core 141 and the valve seat 142 have a suitable opening, and the pressure reducing chamber 144 has a suitable pressure. Further, the pressure reducing valve 14 can reduce the gas pressure to a preset pressure of 0.2±0.05MPa (megapascals).

[0051] In some embodiments of the present application, the housing 11 is made in one piece by three-dimensional printing.

[0052] It should be noted that the housing 11 is an integrally formed hollow box body, which can be made by mold casting or three-dimensional printing. Three-dimensional printing is a preferred method for making the housing 11. Based on the designed 3D model file of the housing 11, the housing 11 is constructed by printing layer by layer using powdered metal or plastic and other bondable materials.

[0053] In some embodiments of the present application, the shell 11 is made of TC4 titanium alloy.

[0054] It should be noted that TC titanium alloy has good creep resistance and thermal stability, high fatigue performance, and satisfactory fracture toughness. It is suitable for manufacturing various parts working in the temperature range of -196°C to 450°C. TC titanium alloy also has excellent process plasticity and superplasticity, and is suitable for forming by various pressure processing methods. TC titanium alloy is mainly used in aerospace to manufacture various beams, bulkheads, slide rails, landing gear beams in aircraft structures, fans and compressor discs and blades of aircraft engines, shells 11 of space rockets, pressure vessels, and various types of fasteners. The shell 11 made by three-dimensional printing of TC titanium alloy powder can meet the use conditions of highly integrated air supply devices.

[0055] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. An electric propulsion air supply combination valve, characterized in that: include: A shell, wherein one side of the shell is provided with an inlet, the other side of the shell is provided with an outlet, a side of the shell close to the inlet is provided with an air filling hole, a side of the shell perpendicular to the air filling hole is provided with a control hole, a side of the shell parallel to one side of the control hole is provided with a pressure reducing hole, the pressure reducing hole and the control hole are staggered in spatial position, and a plurality of flow channels are provided inside the shell, and the plurality of flow channels sequentially connect the inlet, the air filling hole, the control hole, the pressure reducing hole and the outlet; An inflation valve, installed in the inflation hole and close to the inlet, for controlling the gas flow to the inlet or the pressure relief hole; A solenoid valve installed in the control hole, used to control the closing or opening of the passage for gas to flow to the pressure reducing hole; A pressure reducing valve is installed in the pressure reducing hole. After the gas is reduced to a preset pressure by the pressure reducing valve, the gas flows out from the outlet.

2. The electric propulsion air supply combination valve according to claim 1, characterized in that: The pressure reducing valve comprises a valve core and a valve seat arranged opposite to the valve core, the valve core comprises a valve top close to the valve seat and a valve handle away from the valve seat, and the movement of the valve core away from or close to the valve seat controls the pressure reducing effect of the pressure reducing valve.

3. The electric propulsion air supply combination valve according to claim 2, characterized in that: A funnel hole and a fine hole are sequentially arranged inside the valve seat along the gas flow direction, a first flow channel is connected between the funnel hole and the control hole, and an outlet of the fine hole faces the top of the valve top.

4. The electric propulsion air supply combination valve according to claim 3, characterized in that: The valve seat is in a cone shape at the outlet of the fine hole.

5. The electric propulsion air supply combination valve according to claim 3, characterized in that: A filter is arranged between the first flow channel and the funnel hole.

6. The electric propulsion air supply combination valve according to claim 3, characterized in that: The pressure reducing valve further comprises a bushing arranged around the valve top and around the valve seat, wherein the bushing, the valve seat and the valve top seal to form a pressure reducing chamber, the pressure reducing chamber is connected to the fine hole, and a second flow channel is connected between the pressure reducing chamber and the outlet.

7. The electric propulsion air supply combination valve according to claim 6, characterized in that: The pressure reducing valve also includes an end cover located at the outermost side of the pressure reducing hole, a control chamber is arranged between the end cover and the valve handle, an auxiliary channel is arranged inside the valve core, a small hole is connected between one end of the auxiliary channel and the pressure reducing chamber, and the other end of the auxiliary channel is connected to the control chamber.

8. The electric propulsion air supply combination valve according to claim 7, characterized in that: A plurality of springs are arranged between the bushing and the valve top, and the springs and the pressure in the control chamber cooperate with each other to control the valve core to move away from or approach the valve seat.

9. The electric propulsion air supply combination valve according to claim 1, characterized in that: The shell is made by three-dimensional printing.

10. The electric propulsion air supply combination valve according to claim 1, characterized in that: The shell material is TC4 titanium alloy.

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