A dual propellant valve control system

Abstract

The present invention discloses a dual propellant valve control system, comprising a solenoid valve, a fuel valve and an oxygen valve. The control gas outlet of the solenoid valve is respectively connected to the control gas inlet of the fuel valve and the oxygen valve. The dual propellant valve control system provided by the present invention can use a solenoid valve to simultaneously control the opening or closing of two propellant valves, can be applied to the engine propellant supply system, can simplify the structure of the engine supply system and the number of valves, optimize the structural layout of the engine propellant supply system, make the overall structure simpler, and work more reliable.

Description

Technical Field

[0001] The invention relates to the technical field of valve control of liquid rocket engines, and in particular to a dual-propellant valve control system. Background Art

[0002] Many valves are needed in the propellant supply system of a liquid rocket engine to control the supply of propellant. In the prior art, the propellant supply system of a liquid rocket engine often uses a control valve. The rocket engine propellant supply system is divided into a fuel path and an oxidizer path, and two solenoid valves are usually used to control the on and off of the liquid path valves of the fuel path and the oxidizer path respectively. This solution results in a large number of components in the propellant supply system, which is not conducive to the miniaturization design of the liquid rocket engine.

[0003] Therefore, there is an urgent need to design a dual propellant valve control system that can use one solenoid valve to simultaneously control the oxygen valve and the fuel valve. Summary of the invention

[0004] In view of the above-mentioned technical problems in the related art, the present invention provides a dual propellant valve control system, which overcomes the shortcomings of the prior art and controls two propellant valves at the same time through one solenoid valve, which not only saves occupied space and optimizes the spatial layout of the engine system, but also facilitates the miniaturized design of the engine system.

[0005] The present invention provides a dual-propellant valve control system, comprising: a solenoid valve, a fuel valve and an oxygen valve; the control gas outlet of the solenoid valve is connected to the control gas inlet of the fuel valve and the oxygen valve respectively; the solenoid valve comprises: an electromagnetic housing, a solenoid valve cover, an air intake control unit, a solenoid valve core, an exhaust valve core and a force-applying unit arranged on the electromagnetic housing; the solenoid valve cover is provided with the control gas outlet and the first exhaust port, the exhaust valve core is arranged at the first exhaust port to form a sealing surface with its inner wall; a first guide hole is provided on one side of the electromagnetic housing, and the other side is connected to the solenoid valve cover to form a second guide hole, and the first guide hole and the second guide hole are separated by a neck structure; the air intake control unit is arranged in the first guide hole to press the neck structure to form a sealing surface, the solenoid valve core is movably arranged in the second guide hole, and the force-applying unit is arranged in the electromagnetic housing The outer periphery of the magnetic valve core; a boss is provided at one end of the solenoid valve core close to the intake control unit, and a protruding rod is provided at the other end, and the protruding rod extends into the first exhaust port and is connected with the exhaust valve core; when the solenoid valve is not energized, the force-applying unit provides a force to the solenoid valve core away from the intake control unit, so that the intake control unit seals the neck structure and the exhaust valve core opens the first exhaust port, thereby enabling the control air inlets of the oxygen valve and the fuel valve to be connected to the first exhaust port respectively through the control air outlet; when the solenoid valve is energized, the force-applying unit provides a force to the solenoid valve core close to the intake control unit, drives the exhaust valve core to seal the first exhaust port, and drives the intake control unit to release the seal of the neck structure, thereby allowing the control air to enter the control air inlets of the oxygen valve and the fuel valve respectively through the control air outlet of the solenoid valve.

[0006] In one embodiment, the force-applying unit includes a first spring and a coil; a shoulder is provided on a side of the solenoid valve core close to the intake control unit, and a first spring cavity is axially provided at a position of the solenoid housing corresponding to the shoulder, and the first spring is at least partially arranged in the first spring cavity; the coil is arranged at the periphery of the first spring cavity; when the coil is powered off, the elastic force of the first spring is used to push the solenoid valve core away from the intake control unit; when the coil is powered on, the electromagnetic force overcomes the spring force and drives the solenoid valve core close to the intake control unit.

[0007] In one embodiment, the solenoid valve core has a ventilated air hole and a flow channel inside, so as to facilitate ventilation when the solenoid valve core reciprocates in the second guide hole.

[0008] In one embodiment, the outer wall of the intake control unit on the side away from the solenoid valve core is sealed and connected to the inner wall of the solenoid shell, and the outer wall on the other side is spaced apart from the inner wall of the solenoid shell to form a spacing channel; the intake control unit is provided with an inner hole on the side away from the solenoid valve core, and the inner hole is connected to the spacing channel through a small hole to facilitate the control of air entering the spacing channel; the intake control unit is provided with a second spring chamber on the side close to the solenoid valve core, and a second spring and a first steel ball are sequentially arranged in the second spring chamber; one end of the first steel ball is used to press the second spring, and the other end presses the neck structure under the elastic force of the second spring to form a sealing surface, so as to cut off the control air flow between the spacing channel and the solenoid valve core.

[0009] In one embodiment, the air intake control unit is provided with one end of the inner hole extending out of the first guide hole and fixedly connected to the electromagnetic housing through a flange structure; the inner hole is used to communicate with the control air inlet pipeline.

[0010] In one embodiment, the fuel valve comprises a fuel valve housing, an air intake sealing unit, and a piston, a third spring and a long-rod valve core arranged inside the fuel valve housing; the fuel valve housing is provided with a control gas inlet, a fuel path inlet and a fuel path outlet; the air intake sealing unit is arranged at one end of the fuel valve housing, and the piston and the air intake sealing unit are arranged at intervals to form a first working chamber; the control gas inlet passes through the air intake sealing unit and is communicated with the first working chamber; the outer wall of the piston on one side close to the air intake sealing unit is dynamically sealed with the inner wall of the fuel housing, and the outer wall on the other side is formed with the inner wall of the fuel valve housing to form a third spring chamber, and the third spring is arranged in the third spring chamber to provide the piston with an elastic force toward the air intake sealing unit; the long-rod valve core comprises a connecting end, a long rod and a sealing end connected in sequence; the connecting end is connected to the piston, and the long rod on one side close to the connecting end is sealed with the inner wall of the fuel valve housing, and the other side is formed with the inner wall of the fuel valve housing to form a second working chamber; the second working chamber is simultaneously communicated with the fuel path inlet and the fuel path outlet, and the sealing end is arranged at the fuel path outlet;

[0011] When the solenoid valve is not energized, under the elastic force of the third spring, the piston applies a force toward the air intake sealing unit to the long-rod valve core, so as to seal the fuel path outlet with the sealing end.

[0012] In one embodiment, the air intake sealing unit includes a retaining ring and a plugging cover; the outer wall of the plugging cover is sealingly connected to the inner wall of the electromagnetic housing, and the retaining ring is arranged at the end of the electromagnetic housing to clamp and fix the plugging cover; the control air inlet passes through the retaining ring and the plugging cover and then communicates with the first working chamber.

[0013] In one embodiment, the fuel valve housing is further provided with a one-way valve connected to the second exhaust port of the third spring chamber; the one-way valve is used to discharge the medium in the third spring chamber.

[0014] In one embodiment, the one-way valve includes a one-way valve housing, a fourth spring chamber, a fourth spring and a second steel ball arranged in the fuel valve housing; the outer wall of the one-way valve housing on one side away from the third spring chamber is sealedly connected to the inner wall of the fuel valve housing, and the outer wall on the other side is spaced apart from the inner wall of the fuel valve housing to form an exhaust channel; the fourth spring chamber is provided inside the spaced-apart portion of the one-way valve housing and the fuel valve housing, and the fourth spring chamber is connected to the outlet of the one-way valve; the fourth spring is provided in the fourth spring chamber, one end of the second steel ball presses the fourth spring, and the other end presses the second exhaust port to form a sealing surface under the elastic force of the fourth spring; the side wall of the one-way valve housing is also provided with a small hole for exhaust; the small hole connects the exhaust channel with the fourth spring chamber and the one-way valve outlet, so that the gas can be discharged through the one-way valve outlet.

[0015] In one embodiment, a first sealing ring is further provided at the position where the long rod is dynamically sealed to prevent the control air of the fourth spring chamber from penetrating into the second working chamber.

[0016] A dual propellant valve control system provided in an embodiment of the present invention can use one solenoid valve to simultaneously control the opening or closing of two propellant valves, and can be applied to an engine propellant supply system. It can simplify the structure of the engine supply system and the number of valves, optimize the structural layout of the engine propellant supply system, and make the overall structure simpler and the operation more reliable.

[0017] Those skilled in the art will recognize additional features and advantages upon reading the detailed description and upon viewing the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 It is a schematic diagram of the overall structure of a dual propellant valve control system according to an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure of the solenoid valve according to an embodiment of the present invention.

[0021] Figure 3 It is a schematic structural diagram of the solenoid valve air intake control unit part of an embodiment of the present invention.

[0022] Figure 4 Schematic diagram of the structure of a fuel valve according to an embodiment of the present invention.

[0023] Figure 5 It is an enlarged view of the first working chamber end of the fuel valve according to an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the overall structure of a one-way valve according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and through specific embodiments. Spatial relationship terms such as "below", "below", "under...", "low", "above", "on...", "high", etc. are used to facilitate the description to explain the positioning of an element relative to a second element, indicating that these terms are intended to cover different orientations of the device in addition to orientations different from those shown in the figures. In addition, for example, "an element is above / below another element" can mean that the two elements are in direct contact, or it can mean that there are other elements between the two elements. In addition, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc., and should not be regarded as limitations. Similar terms represent similar elements throughout the description.

[0026] See also Figure 1 The present invention provides a dual propellant valve control system, comprising a solenoid valve 1, a fuel valve 2 and an oxygen valve 3. The control gas outlet of the solenoid valve 1 is connected to the control gas inlets of the fuel valve 2 and the oxygen valve 3, respectively, so that two propellant valves can be controlled simultaneously by one solenoid valve.

[0027] See also Figure 1 and Figure 2 The solenoid valve 1 includes a solenoid housing 11, a solenoid valve cover 12, an air intake control unit 13, a solenoid valve core 14, an exhaust valve core 15, and a force unit 16 arranged on the solenoid housing 11. The solenoid valve cover 12 is provided with a control air outlet 121 and a first exhaust port 122. The exhaust valve core 15 is arranged in the first exhaust port 122 and is used to form a sealing surface after being pressed against the inner wall of the first exhaust port 122. The sealing surface of the first exhaust port 122 is a metal sealing surface, and the end surface of the exhaust valve core 15 used for sealing is inlaid with a non-metallic sealing surface. The non-metallic sealing surface and the metal sealing surface can form a good sealing pair, and can reliably realize the connection and disconnection between the internal flow channel of the solenoid valve and the first exhaust port 122.

[0028] A first guide hole 111 is provided on one side of the electromagnetic housing 11, and the other side is connected to the electromagnetic valve cover 12 to form a second guide hole 112, and the first guide hole 111 and the second guide hole 112 are separated by a neck structure 113. The intake control unit 13 is arranged in the first guide hole 111, and is used to press the neck structure 113 to form a sealing surface to cut off the communication between the first guide hole 111 and the second guide hole 112. The electromagnetic valve core 14 is movably arranged in the second guide hole 112, and the axial outer wall of the electromagnetic valve core 14 is spaced from the outer wall of the second guide hole 112. The force-applying unit 16 is arranged on the periphery of the electromagnetic valve core 14, and is used to provide the electromagnetic valve core 14 with a sealing force (a force axially away from the intake control unit 13) and a sealing release force (a force axially close to the intake control unit 13).

[0029] A boss 141 is provided on one side of the solenoid valve core 14 close to the air intake control unit 13 , and a protruding rod 142 is provided on the other end thereof. The protruding rod 142 extends into the first exhaust port 122 and is connected to the exhaust valve core 15 .

[0030] The dual propellant valve control system of the embodiment of the present invention is a combination structure of two propellant valves controlled by one solenoid valve. When applied to the engine propellant supply system, the supply system structure and the number of valves can be simplified. The solenoid valve is also provided with a first exhaust port connected to the control gas outlet to facilitate the pressure relief of the oxygen valve and the fuel valve control gas inlet end (control chamber).

[0031] Specifically, after the valves are assembled, the fuel valve 2 and the oxygen valve 3 are in a closed state, and the solenoid valve core 14 approaches the solenoid valve cover 12 under the action of the intake control unit 13, so that the boss 141 is separated from the intake control unit 13, and the extension rod 142 drives the exhaust valve core 15 to separate from the first exhaust outlet 122, and the solenoid valve 1 is in a closed state.

[0032] When the solenoid valve 1 is not powered, the solenoid valve remains in a closed state, and the force applying unit 16 provides a force to the solenoid valve core 14 away from the intake control unit 13, so that the intake control unit 13 seals the neck structure 113 and the exhaust valve core 15 opens the first exhaust port 122, so that the control gas inlets of the fuel valve 2 and the oxygen valve 3 are connected to the first exhaust port 122 through the control gas outlet 121. At the same time, the intake control unit 13 can also seal the neck structure 113 (control gas inlet) of the solenoid valve 1.

[0033] When the solenoid valve 1 is energized, the force-applying unit 16 provides a force to the solenoid valve core 14 to approach the intake control unit 13, drives the solenoid valve core to move toward the intake control unit, and drives the exhaust valve core 15 to seal the first exhaust port 121, drives the intake control unit 13 to release the seal on the neck structure 113, so that the control gas enters the control gas inlets of the fuel valve 2 and the oxygen valve 3 respectively through the control gas outlet 112 of the solenoid valve 1, and the fuel valve 2 and the oxygen valve 3 are opened under the drive of the control gas.

[0034] Furthermore, a sealing gasket is provided on the non-metallic sealing surface of the exhaust valve core to improve the sealing effect.

[0035] Furthermore, the extension rod 142 extends into the first exhaust port 122 and is threadedly connected to the exhaust valve core 15 .

[0036] In one embodiment, the force applying unit 16 includes a first spring 161 and a coil 162. A shoulder is provided on one side of the electromagnetic valve core 14 close to the air intake control unit 13, and a first spring cavity 114 is axially provided at a position of the electromagnetic housing 11 corresponding to the shoulder, and the first spring 161 is at least partially disposed in the first spring cavity 114. The coil 162 is disposed at the periphery of the first spring cavity 114.

[0037] When the coil is not energized, the first spring 161 uses elastic force to push the electromagnetic valve core 14 away from the intake control unit 13, so that the electromagnetic valve remains closed. When the coil is energized, an electromagnetic force is generated, which is opposite to the elastic force and can overcome the elastic force to drive the electromagnetic valve core 14 to move toward the intake control unit 13, so that the electromagnetic valve is opened and the first exhaust port is sealed.

[0038] Furthermore, the solenoid valve core 14 has a ventilated air hole and a flow channel 143 inside, and the flow channel 143 is connected to the control air exhaust port to facilitate ventilation when the solenoid valve core 14 reciprocates in the second guide hole 112 .

[0039] See also Figure 2 and Figure 3 In one embodiment, the outer wall of the air intake control unit 13 on the side away from the electromagnetic valve core 14 is sealed and connected to the inner wall of the electromagnetic housing 11, and the outer wall on the other side is spaced from the inner wall of the electromagnetic housing 11 to form a spacing channel A. The side of the air intake control unit 13 away from the electromagnetic valve core 14 is provided with an inner hole 131, and the inner hole 131 is connected to the spacing channel A through a small hole 132, so that the control air enters the spacing channel A. The side of the air intake control unit 13 close to the electromagnetic valve core 14 is provided with a second spring cavity 133, and the second spring 134 and the first steel ball 135 are sequentially arranged in the second spring cavity 133. One end of the first steel ball 135 is used to press the second spring 134, and the other end is used to press the neck structure 113 under the elastic force of the second spring 134 to form a sealing surface, so as to cut off the control air flow between the spacing channel A and the electromagnetic valve core 14.

[0040] The sealing end of the neck structure 113 is matched with the surface of the first steel ball 135 to increase the sealing area between the first steel ball and the neck structure and improve the sealing effect.

[0041] The dual-propellant valve control system of the embodiment of the present invention uses the inner hole 131 as the control gas inlet of the solenoid valve. After the control gas enters the solenoid valve through the inner hole 131, it first enters the spacing channel A through the small hole 132. When the air intake control unit 3 releases the seal of the neck structure, the control gas in the spacing channel A can enter the solenoid valve core 14 through the neck structure.

[0042] In one embodiment, the air intake control unit 13 is provided with an inner hole 131, one end of which extends out of the first guide hole 111 and is fixedly connected to the electromagnetic housing 11 through a flange structure 135 to prevent the control air intake end of the electromagnetic valve from being connected to the atmosphere. The inner hole 131 is used to communicate with the control air inlet pipeline.

[0043] See also Figure 1 and Figure 2 The control gas inlets of the fuel valve 2 and the oxygen valve 3 are connected to the control gas outlet 121 of the solenoid valve 1 through the conduit 4 respectively.

[0044] The above content is to use the solenoid valve, oxygen valve and fuel valve as one solution, but the solenoid valve of the present application can be used alone to output control gas to control other valves.

[0045] See also Figure 1 and Figure 4 In the above embodiment, the fuel valve 2 includes a fuel valve housing 21, an air intake sealing unit 22, and a piston 23, a third spring 24 and a long rod valve core 25 arranged inside the fuel valve housing 21. The fuel valve housing 21 is provided with a control gas inlet 211, a fuel path inlet 212 and a fuel path outlet 213. The control gas inlet 211 is communicated with the conduit 4, the fuel path inlet is used to communicate with the fuel inlet pipe for fuel to enter, and the fuel path outlet is used to discharge the fuel in the fuel valve. The air intake sealing unit 22 is arranged at one end of the fuel valve housing 21, and the piston 23 arranged inside the fuel valve housing 21 is spaced apart from the air intake sealing unit 22 to form a first working chamber B, and the control gas inlet 211 passes through the air intake sealing unit 22 and then communicates with the first working chamber B.

[0046] The outer wall of the piston 23 on one side close to the air intake sealing unit 22 is dynamically sealed with the inner wall of the fuel housing 21, and the outer wall on the other side forms a third spring chamber 26 with the inner wall of the fuel valve housing 21. The third spring 24 is disposed in the third spring chamber 26, and one end of the third spring 24 away from the air intake sealing unit 22 abuts against the electromagnetic housing 21, and the other end presses the dynamic sealing end of the piston 23, thereby providing an elastic force for the piston 23 to move toward the air intake sealing unit 22.

[0047] The long-rod valve core 25 includes a connecting end 251, a long rod 252 and a sealing end 253 which are connected in sequence. The connecting end 251 is connected to the side of the piston away from the air intake sealing unit 22, the side of the long rod 252 close to the connecting end 251 is sealed and connected to the inner wall of the fuel valve housing 21, and the other side forms a second working chamber C with the inner wall of the fuel valve housing 21. The second working chamber C is communicated with the fuel path inlet 212 and the fuel path outlet 213 at the same time, and the sealing end 253 is arranged at the fuel path outlet 213. When the sealing end 253 seals the fuel path outlet 213, the second working chamber C is only communicated with the fuel path inlet 212.

[0048] See also Figure 1 , Figure 4 and Figure 5 In order to improve the sealing performance of the fuel valve, the present invention may provide a first sealing ring 2521 at the sealing position between the long rod 252 and the inner wall of the fuel valve housing 21 .

[0049] Furthermore, the connection end 251 of the long-stem valve core 25 is threadedly connected to the piston 23. The sealing end 253 of the long-stem valve core 25 is inlaid with a non-metallic sealing surface, and the position of the fuel path outlet 213 for docking with the sealing end 253 is provided with a metal sealing surface.

[0050] It should be noted that, when the sealing end 253 of the long-stem valve core 25 seals the fuel path outlet 213, the fuel path inlet is located approximately in the middle of the second working chamber C. Since the fuel path inlet 212 is connected to the second working chamber C, in order to avoid opening the fuel path outlet 213 under the pressure of the fuel, the cavity area close to the first sealing ring 2521 and the cavity area close to the fuel path outlet 213 can be made substantially equal with the fuel path inlet 212 as the midpoint. This ensures that after the fuel propellant enters the second working chamber C, the pressure applied to the first sealing ring 2521 is equal to the pressure applied to the sealing end 253.

[0051] Specifically, the axial diameters of the long rods 252 disposed in the second working chamber C can be made the same, and the diameters of the parts of the inner wall of the electromagnetic housing that form the second working chamber C can be made the same. When a transition surface is provided between the first sealing ring 2521 and the long rod 252, a transition surface with the same slope is correspondingly provided between the sealing end 253 and the sealing surface of the fuel path outlet 213.

[0052] When the solenoid valve 1 is not energized, under the elastic force of the third spring 24, the piston 23 applies a force toward the air inlet sealing unit 22 to the long-stem valve core 25, so as to seal the fuel path outlet 213 with the sealing end 253, that is, the fuel inlet and outlet are closed. Under the action of the third spring, the fuel valve pushes the piston to stop the sealing end of the long-stem valve and the inner wall of the housing (fuel path outlet) in the closed position, that is, the fuel inlet and outlet are closed. Since the working areas on both sides of the fuel path inlet 212 in the second working chamber C are basically the same, the valve medium cannot push the valve open under the action of the third spring force.

[0053] The dual-propellant valve control system of the present invention can keep the valve closed under the elastic force of the third spring even if the working areas on both sides of the fuel path inlet 212 in the second working chamber C are not completely the same.

[0054] See also Figure 5 In the above embodiment, a piston sealing ring 231 is further provided at the position where the piston 23 is dynamically sealed with the inner wall of the fuel housing 21 .

[0055] See also Figure 4 and Figure 5 In one embodiment, the air inlet sealing unit 22 includes a retaining ring 221 and a plugging cover 222. The outer wall of the plugging cover 222 is sealed and connected to the inner wall of the electromagnetic housing 21. The retaining ring 221 is arranged at the end of the electromagnetic housing 21 to clamp and fix the plugging cover 222 to the electromagnetic housing. The control air inlet 211 passes through the retaining ring 221 and the plugging cover 222 and communicates with the first working chamber B.

[0056] Furthermore, in order to increase the sealing performance between the outer wall of the blocking cover 222 and the inner wall of the electromagnetic housing 21 , a second sealing ring 223 may be provided between the outer wall of the blocking cover 222 and the inner wall of the electromagnetic housing 21 .

[0057] In one embodiment, the third spring chamber 26 is further provided with a second exhaust port for discharging the medium in the chamber, and a one-way valve 27 is provided at the second exhaust port. When a certain pressure is formed in the third spring chamber, the one-way valve 27 can open and discharge the medium.

[0058] See also Figure 5 and Figure 6The one-way valve includes a one-way valve housing 271, a fourth spring chamber 272, a fourth spring 273 and a second steel ball 274 arranged in the fuel valve housing 21. The outer wall of the one-way valve housing 271 on one side away from the third spring chamber 26 is sealed and connected to the inner wall of the fuel valve housing 21, and the outer wall of the other side is spaced apart from the inner wall of the fuel valve housing 21 to form an exhaust channel D. The fourth spring chamber 272 is arranged inside the spaced-apart portion of the one-way valve housing 271 and the fuel valve housing 21, and the fourth spring chamber 272 is also communicated with the outlet 275 of the one-way valve 27. The side wall of the one-way valve housing 271 is also provided with a small hole 276 for exhaust, and the small hole 276 connects the exhaust channel D with the fourth spring chamber 272 and the one-way valve outlet 275.

[0059] The fourth spring 273 is arranged in the fourth spring chamber 272. One end of the second steel ball 274 presses the fourth spring 273, and the other end presses the second exhaust port to form a sealing surface under the elastic force of the fourth spring 273. If a slight leakage occurs in the dynamic seal of the first sealing ring and the second sealing ring, the leaking medium may enter the fourth spring chamber 272. After the leaking medium forms a certain pressure in the fourth spring chamber 272, it pushes the fourth steel ball away from the second exhaust port and connects the second exhaust port with the exhaust channel D. The leaking medium passes through the exhaust channel D, the small hole 276, and the fourth spring chamber 272 and is discharged from the exhaust outlet 275 of the one-way valve, which can effectively avoid the formation of back pressure inside the fuel valve that hinders the valve action.

[0060] Furthermore, under the sealing specific pressure required to prevent water vapor in the air from entering the inside of the one-way valve, the fourth spring force value is designed to be small, and the leaking medium can open the one-way valve at a very low pressure.

[0061] The oxygen valve and the fuel valve of the dual-propellant valve control system of the present invention have substantially the same structural composition, and one solenoid valve can be used to control the two valves simultaneously.

[0062] When the dual propellant valve control system of the present invention starts to work, the coil is energized to generate electromagnetic force, and the electromagnetic valve core overcomes the force of the first spring under the action of the electromagnetic force and moves toward the direction of the control gas inlet. When the non-metallic sealing surface of the exhaust valve core fits with the metal sealing surface of the electromagnetic valve cover, the electromagnetic valve core stops moving, and the exhaust valve core and the electromagnetic valve cover form a seal to cut off the control gas flow between the internal flow channel of the electromagnetic valve and the exhaust port. At the same time, the boss end of the electromagnetic valve core contacts the first steel ball and drives it to move, so that the first steel ball is separated from the electromagnetic housing sealing surface (neck structure), and the electromagnetic valve inlet is connected to the flow channel of the electromagnetic valve core. The control gas flows into the first working chamber of the fuel valve and the oxygen valve along the conduit through the electromagnetic valve inlet, the small hole of the air intake control unit, the interval channel A, the internal flow channel of the electromagnetic valve core, and the controller outlet. The first working chamber is the control chamber of the fuel valve and the oxygen valve. The control gas forms a force in the first working chamber to overcome the force of the third spring to push the piston downward (away from the plug cover). When the piston moves downward, it drives the long rod valve core to move downward until the lower end surface of the piston fits with the axial surface of the third spring chamber set in the housing and stops moving. At this time, the non-metallic sealing surface of the sealing end of the long rod valve core is separated from the metal sealing surface of the shell, the fuel path inlet and outlet are connected, the oxygen path inlet and outlet are connected, and the fuel valve and the oxygen valve are opened.

[0063] When the valves of the oxygen valve and the fuel valve need to be closed, the coil 2 can be powered off. Under the combined action of the medium force formed by the first spring and the control gas, the solenoid valve core moves to fit with the end face of the solenoid valve cover and then stops moving. The boss end of the solenoid valve core is separated from the first steel ball. The first steel ball moves to the sealing surface (neck structure) of the solenoid housing under the action of the second spring, that is, the control gas inlet of the solenoid valve and the flow channel of the solenoid valve core are closed, so the solenoid valve is closed. At this time, the non-metallic sealing surface of the exhaust valve core is separated from the metal sealing surface of the solenoid valve cover (the first exhaust outlet sealing surface), and the first working chamber of the fuel valve and the oxygen valve is connected to the first exhaust outlet through the conduit. The medium in the first working chamber is discharged to the atmosphere through the first exhaust outlet to relieve pressure. Under the action of the third spring, the fuel valve / oxygen valve pushes the piston to stop the long rod valve core and the propellant outlet in the closed position, that is, the fuel / oxygen inlet and outlet are closed.

[0064] The above-mentioned embodiments of the present invention can be combined with each other and have corresponding technical effects.

[0065] A dual propellant valve control system of the present invention can use one solenoid valve to simultaneously control the opening or closing of two propellant valves, and can be applied to an engine propellant supply system. It can simplify the structure of the engine supply system and the number of valves, optimize the structural layout of the engine propellant supply system, and make the overall structure simpler and the operation more reliable.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual propellant valve control system, characterized in that: include: A solenoid valve, a fuel valve and an oxygen valve; the control gas outlet of the solenoid valve is communicated with the control gas inlets of the fuel valve and the oxygen valve respectively; The solenoid valve comprises: an electromagnetic housing, a solenoid valve cover, an air intake control unit, a solenoid valve core, an exhaust valve core and a force application unit arranged on the electromagnetic housing; the solenoid valve cover is provided with the control air outlet and a first exhaust port, and the exhaust valve core is arranged at the first exhaust port to form a sealing surface with its inner wall; The electromagnetic housing is provided with a first guide hole on one side, and is connected with the electromagnetic valve cover on the other side to form a second guide hole, wherein the first guide hole and the second guide hole are separated by a neck structure; The air intake control unit is arranged in the first guide hole, and is used to press the neck structure to form a sealing surface. The solenoid valve core is movably arranged in the second guide hole, and the force applying unit is arranged on the periphery of the solenoid valve core. The solenoid valve core is provided with a boss at one end close to the air intake control unit, and a protruding rod at the other end, the protruding rod extends into the first exhaust port and is connected to the exhaust valve core; When the solenoid valve is not powered, the force applying unit provides a force to the solenoid valve core to move away from the intake control unit, so that the intake control unit seals the neck structure and the exhaust valve core opens the first exhaust port, so that the control air inlets of the oxygen valve and the fuel valve can be communicated with the first exhaust port through the control air outlet respectively; When the solenoid valve is energized, the force-applying unit provides a force to the solenoid valve core to approach the intake control unit, drives the exhaust valve core to seal the first exhaust port, and drives the intake control unit to release the seal on the neck structure, thereby allowing the control gas to enter the control gas inlet of the oxygen valve and the fuel valve respectively through the control gas outlet of the solenoid valve.

2. The dual propellant valve control system according to claim 1, characterized in that: The force applying unit includes a first spring and a coil; A shoulder is provided on one side of the solenoid valve core close to the air intake control unit, a first spring cavity is axially provided at a position of the solenoid housing corresponding to the shoulder, and the first spring is at least partially arranged in the first spring cavity; the coil is arranged at the periphery of the first spring cavity; When the coil is powered off, the elastic force of the first spring is used to push the solenoid valve core away from the intake control unit; when the coil is powered on, the electromagnetic force overcomes the spring force to drive the solenoid valve core closer to the intake control unit.

3. The dual propellant valve control system according to claim 2, characterized in that: The electromagnetic valve core has a ventilated air hole and a flow channel inside, so that the electromagnetic valve core can be ventilated when it reciprocates in the second guide hole.

4. The dual propellant valve control system according to claim 3, characterized in that: The outer wall of the air intake control unit on one side away from the electromagnetic valve core is sealed and connected to the inner wall of the electromagnetic housing, and the outer wall on the other side is spaced apart from the inner wall of the electromagnetic housing to form a spacing channel; An inner hole is provided on a side of the air intake control unit away from the solenoid valve core, and the inner hole is connected with the interval channel through a small hole, so as to facilitate the control air to enter the interval channel; A second spring chamber is provided on the side of the intake control unit close to the solenoid valve core, and a second spring and a first steel ball are provided in sequence in the second spring chamber; one end of the first steel ball is used to compress the second spring, and the other end compresses the neck structure to form a sealing surface under the elastic force of the second spring, so as to cut off the control air flow between the spacing channel and the solenoid valve core.

5. The dual propellant valve control system according to claim 4, characterized in that: The air intake control unit has one end provided with the inner hole extending out of the first guide hole and fixedly connected to the electromagnetic housing through a flange structure; The inner hole is used to communicate with the control gas inlet pipeline.

6. The dual propellant valve control system according to any one of claims 1 to 5, characterized in that: The fuel valve comprises a fuel valve housing, an air intake sealing unit, and a piston, a third spring and a long-rod valve core arranged inside the fuel valve housing; The fuel valve housing is provided with a control gas inlet, a fuel path inlet and a fuel path outlet; The air intake sealing unit is arranged at one end of the fuel valve housing, and the piston and the air intake sealing unit are arranged at intervals to form a first working chamber; the control air inlet penetrates the air intake sealing unit and communicates with the first working chamber; The outer wall of the piston on one side close to the air intake sealing unit is dynamically sealed with the inner wall of the fuel valve housing, and the outer wall on the other side and the inner wall of the fuel valve housing form a third spring cavity, and the third spring is arranged in the third spring cavity to provide the piston with an elastic force toward the air intake sealing unit; The long-rod valve core comprises a connecting end, a long rod and a sealing end connected in sequence; the connecting end is connected to the piston, one side of the long rod close to the connecting end is sealedly connected to the inner wall of the fuel valve housing, and the other side forms a second working chamber with the inner wall of the fuel valve housing; the second working chamber is communicated with the fuel path inlet and the fuel path outlet at the same time, and the sealing end is arranged at the fuel path outlet; When the solenoid valve is not energized, under the elastic force of the third spring, the piston applies a force toward the air intake sealing unit to the long-rod valve core, so as to seal the fuel path outlet with the sealing end.

7. The dual propellant valve control system according to claim 6, characterized in that: The air intake sealing unit includes a retaining ring and a plugging cover; the outer wall of the plugging cover is sealed and connected to the inner wall of the electromagnetic housing, and the retaining ring is arranged at the end of the electromagnetic housing to clamp and fix the plugging cover; the control air inlet passes through the retaining ring and the plugging cover and then communicates with the first working chamber.

8. The dual propellant valve control system according to claim 7, characterized in that: The fuel valve housing is further provided with a one-way valve connected to the second exhaust port of the third spring chamber; the one-way valve is used to discharge the medium in the third spring chamber.

9. The dual propellant valve control system according to claim 8, characterized in that: The one-way valve comprises a one-way valve housing, a fourth spring chamber, a fourth spring and a second steel ball arranged in the fuel valve housing; The outer wall of the one-way valve housing away from the third spring chamber is sealed and connected to the inner wall of the fuel valve housing, and the outer wall of the other side is spaced apart from the inner wall of the fuel valve housing to form an exhaust passage; the fourth spring chamber is provided inside the spaced-apart portion of the one-way valve housing and the fuel valve housing, and the fourth spring chamber is communicated with the outlet of the one-way valve; The fourth spring is arranged in the fourth spring cavity, one end of the second steel ball presses the fourth spring, and the other end presses the second exhaust port to form a sealing surface under the elastic force of the fourth spring; The side wall of the one-way valve housing is also provided with a small hole for exhaust; the small hole connects the exhaust channel with the fourth spring chamber and the one-way valve outlet, so that the gas can be discharged through the one-way valve outlet.

10. The dual propellant valve control system according to claim 9, characterized in that: A first sealing ring is also provided at the position where the long rod is dynamically sealed to prevent the control air of the fourth spring chamber from penetrating into the second working chamber.

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