CN115539249A - Double-propellant valve control system - Google Patents

Abstract

The invention discloses a double propellant valve control system which comprises an electromagnetic valve, a fuel valve and an oxygen valve. And a control gas outlet of the electromagnetic valve is respectively communicated with a control gas inlet of the fuel valve and a control gas inlet of the oxygen valve. The double-propellant valve control system provided by the invention can utilize one electromagnetic valve to simultaneously control the opening or closing of two propellant valves, can be applied to an engine propellant supply system, can simplify the structure and the number of valves of the engine propellant supply system, optimizes the structural layout of the engine propellant supply system, and ensures that the whole structure is simpler and the work is more reliable.

Description

A dual propellant valve control system

technical field

The invention relates to the technical field of liquid rocket engine valve control, in particular to a dual-propellant valve control system.

Background technique

The propellant supply system of a liquid rocket engine requires many valves to control the supply of propellant. In the prior art, the liquid rocket engine propellant supply system usually adopts control valves. The propellant supply system of a rocket engine is divided into a fuel path and an oxidant path, and two solenoid valves are usually used to control the opening and closing of the liquid path valves of the fuel path and the oxidant path respectively. This solution leads to a large number of components in the propellant supply system, which is not conducive to the miniaturization design of the liquid rocket engine.

Therefore, there is an urgent need to design a dual-propellant valve control system that can simultaneously control the oxygen valve and the fuel valve using a solenoid valve.

Contents of the invention

Aiming at the above-mentioned technical problems in the related art, the present invention provides a dual-propellant valve control system, which overcomes the deficiencies of the prior art, and simultaneously controls two propellant valves through one electromagnetic valve, which not only saves space, but also optimizes The spatial layout of the engine system is also conducive to the miniaturization design of the engine system.

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 communicates with the control gas inlets of the fuel valve and the oxygen valve respectively; The solenoid valve includes: a solenoid housing, a solenoid valve cover, an intake control unit, a solenoid valve core, an exhaust valve core and a force applying unit arranged in the solenoid housing; the solenoid valve cover is provided with the control air outlet and the first exhaust port, the exhaust valve core is arranged on 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 a first guide hole is provided on the other side It is connected with the electromagnetic valve cover to form a second guide hole, and the first guide hole is separated from the second guide hole by a neck structure; the air intake control unit is arranged in the first guide hole, It is used to press the neck structure to form a sealing surface, the electromagnetic valve core is movably arranged in the second guide hole, and the force applying unit is arranged on the periphery of the electromagnetic valve core; the electromagnetic valve core is close to One end of the air intake control unit is provided with a boss, and the other end is provided with an extension rod, and the extension rod extends into the first exhaust port to connect with the exhaust valve core; the solenoid valve is not powered , the force applying unit provides the electromagnetic valve core with a force 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 gas inlets of the oxygen valve and the fuel valve can communicate with the first exhaust port through the control gas outlet respectively; when the solenoid valve is energized, the force applying unit gives The electromagnetic valve core provides a force 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 on the neck structure, Thus, the control gas passes through the control gas outlet of the electromagnetic valve and enters the control gas inlets of the oxygen valve and the fuel valve respectively.

In one embodiment, the force applying unit includes a first spring and a coil; a shoulder is provided on the side of the electromagnetic valve close to the air intake control unit, and the electromagnetic housing corresponds to the shoulder. A first spring cavity is arranged in the axial direction, and the first spring is at least partly arranged in the first spring cavity; the coil is arranged on the periphery of the first spring cavity; when the coil is de-energized, the The elastic force of the first spring pushes the electromagnetic valve core away from the intake control unit; when the coil is energized, the electromagnetic force overcomes the spring force and drives the electromagnetic valve core close to the intake control unit.

In one embodiment, the electromagnetic valve core has a ventilation hole and a flow channel inside, so as to facilitate ventilation when the electromagnetic valve core reciprocates in the second guide hole.

In one embodiment, the outer wall of the air intake control unit on the side away from the electromagnetic valve core is in sealing connection with 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 an interval channel; The side of the air intake control unit away from the electromagnetic valve core is provided with an inner hole, and the inner hole communicates with the interval passage through a small hole, so that the control air enters the interval passage; the intake control unit is close to One side of the solenoid valve core is provided with a second spring chamber, and the second spring chamber is sequentially provided with a second spring and a first steel ball; one end of the first steel ball is used to compress the second spring , and the other end presses the neck structure to form a sealing surface under the elastic force of the second spring, so as to block the control air flow between the spacer channel and the electromagnetic valve core.

In one embodiment, after the air intake control unit is provided with one end of the inner hole protruding from the first guide hole, it is fixedly connected with the electromagnetic housing through a flange structure; the inner hole is used for Control gas inlet line connection.

In one embodiment, the fuel valve includes a fuel valve housing, an air intake sealing unit, a piston, a third spring, and a long rod valve core arranged inside the fuel valve housing; the fuel valve housing is provided with There are a control air 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 is spaced apart from the air intake sealing unit to form a first working chamber; the control The air inlet passes through the air inlet sealing unit and communicates with the first working chamber; the outer wall of the piston close to the air inlet sealing unit is in dynamic sealing connection with the inner wall of the fuel housing, and the outer wall of the other side is connected with the inner wall of the fuel housing. The inner wall of the fuel valve casing forms a third spring chamber, and the third spring is arranged in the third spring chamber for providing the piston with an elastic force toward the air intake sealing unit; the long stem valve The core includes a connection end, a long rod and a sealing end connected in sequence; the connection end is connected to the piston, the side of the long rod close to the connection end is in sealing connection with the inner wall of the fuel valve casing, and the other side is in sealing connection with the inner wall of the fuel valve casing. The inner wall of the fuel valve housing forms a second working chamber; the second working chamber communicates with the fuel passage inlet and the fuel passage outlet at the same time, and the sealing end is arranged at the fuel passage outlet;

When the solenoid valve is not energized, under the action of the elastic force of the third spring, the piston exerts a force on the long stem valve core toward the air inlet sealing unit, so that the seal end can The outlet of the fuel passage is sealed.

In one embodiment, the air inlet sealing unit includes a retaining ring and a blocking cover; the outer wall of the blocking cover is in sealing connection with the inner wall of the electromagnetic housing, and the retaining ring is arranged at the end of the electromagnetic housing for use After clamping and fixing the blocking cover; the control air inlet passes through the retaining ring and the blocking cover and communicates with the first working chamber.

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

In one embodiment, the one-way valve includes a one-way valve housing disposed on the fuel valve housing, a fourth spring chamber, a fourth spring and a second steel ball; the one-way valve housing is far away from the fuel valve housing. One side of the outer wall of the third spring chamber is in sealing connection with the inner wall of the fuel valve housing, and the other side of the outer wall is spaced apart from the inner wall of the fuel valve housing to form an exhaust channel; the one-way valve housing is connected to the fuel valve housing. The interior of the spaced part of the valve housing is provided with the fourth spring chamber, and the fourth spring chamber communicates with the outlet of the one-way valve; the fourth spring is arranged in the fourth spring chamber, the 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 action of the elastic force of the fourth spring; the side wall of the one-way valve housing also A small hole for exhaust is provided; the small hole communicates the exhaust channel with the fourth spring chamber and the outlet of the one-way valve, so that the gas can be discharged through the outlet of the one-way valve.

In one embodiment, a first sealing ring is provided at the position where the long rod is dynamically sealed, so as to prevent the control air in the fourth spring chamber from seeping into the second working chamber.

The embodiment of the present invention provides a dual-propellant valve control system, which can simultaneously control the opening or closing of two-way propellant valves with one solenoid valve, can be applied to the engine propellant supply system, and can simplify the structure and valves of the engine supply system Quantity, optimize the structural layout of the engine propellant supply system, so that the overall structure is simpler and the work is more reliable.

Those skilled in the art will recognize additional features and advantages after reading the detailed description and after viewing the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a schematic diagram of the overall structure of a dual-propellant valve control system according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the overall structure of the solenoid valve according to the embodiment of the present invention.

Fig. 3 is a schematic structural view of the electromagnetic valve air intake control unit according to the embodiment of the present invention.

Fig. 4 is a structural schematic diagram of a fuel valve according to an embodiment of the present invention.

Fig. 5 is an enlarged view of the first working chamber end of the fuel valve according to the embodiment of the present invention.

Fig. 6 is a schematic diagram of the overall structure of the one-way valve according to the embodiment of the present invention.

detailed description

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. Spatially relative terms such as "below", "beneath", "under", "lower", "above", "on", "higher", etc. are used to facilitate description to explain the relative The orientation of two elements means that these terms are intended to encompass different orientations of the device in addition to orientations other than those shown in the figures. In addition, for example, "one element is on/under another element" may mean that two elements are in direct contact, or 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, sections, etc. and should not be taken as limitations. Similar terms refer to similar elements throughout the description.

Referring to FIG. 1 , the present invention provides a dual propellant valve control system, including a solenoid valve 1 , a fuel valve 2 and an oxygen valve 3 . The control gas outlet of the solenoid valve 1 communicates with 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.

Referring to Fig. 1 and Fig. 2 at the same time, the solenoid valve 1 includes a solenoid housing 11, a solenoid valve cover 12, an intake control unit 13, a solenoid valve core 14, an exhaust valve core 15 and a force applying 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 , and the exhaust valve core 15 is arranged in the first exhaust port 122 to be pressed against the inner wall of the first exhaust port 122 to form a sealing surface. The sealing surface of the first exhaust port 122 is a metal sealing surface, and the end surface of the exhaust valve core 15 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, which can reliably realize The connection between the internal flow channel of the solenoid valve and the first exhaust port 122 .

One side of the electromagnetic housing 11 is provided with a first guide hole 111, and the other side is connected with the solenoid 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. open. The air intake control unit 13 is disposed in the first guide hole 111 for pressing the neck structure 113 to form a sealing surface, so as to block the communication between the first guide hole 111 and the second guide hole 112 . The solenoid valve core 14 is movably disposed in the second guide hole 112 , and the axial outer wall of the solenoid valve core 14 is spaced apart from the outer wall of the second guide hole 112 . The force applying unit 16 is arranged on the periphery of the solenoid valve core 14, and is used to provide the solenoid valve core 14 with a sealing force (a force axially away from the intake control unit 13) and a force of releasing the seal (a force axially close to the intake control unit 13). force).

The solenoid valve core 14 is provided with a boss 141 on one side close to the air intake control unit 13 , and a protruding rod 142 is provided at the other end, and the protruding rod 142 extends into the first exhaust port 122 to connect with the exhaust valve core 15 .

The dual propellant valve control system of the embodiment of the present invention uses a solenoid valve to control the combined structure of two propellant valves. After being applied to the engine propellant supply system, the structure of the supply system and the number of valves can be simplified. The solenoid valve is also provided with a first exhaust port communicated with the control air outlet, which facilitates pressure relief at the control air inlet port (control cavity) of the oxygen valve and the fuel valve.

Specifically, after the valve is assembled, the fuel valve 2 and the oxygen valve 3 are in the closed state, and the electromagnetic valve core 14 approaches the electromagnetic 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 away from the first exhaust outlet 122, and the solenoid valve 1 is in a closed state.

When the solenoid valve 1 is not energized, the solenoid valve remains closed, and the force applying unit 16 provides the solenoid valve core 14 with a force 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 Opening the first exhaust port 122 enables the control gas inlets of the fuel valve 2 and the oxygen valve 3 to communicate with the first exhaust port 122 through the control gas outlet 121 respectively. At the same time, the air intake control unit 13 can also seal the neck structure 113 (control air inlet) of the solenoid valve 1 .

When the solenoid valve 1 is energized, the force applying unit 16 provides the solenoid valve core 14 with a force close to the intake control unit 13, drives the solenoid valve core to move in the direction of the intake control unit, and drives the exhaust valve core 15 to seal the first exhaust valve. port 121 to drive the air intake control unit 13 to release the seal on the neck structure 113, so that the control gas passes through the control gas outlet 112 of the solenoid valve 1 and enters the control gas inlets of the fuel valve 2 and the oxygen valve 3 respectively, and the fuel valve 2 and the oxygen valve The valve 3 is opened under the drive of the control gas.

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

Furthermore, the extension rod 142 extends into the first exhaust port 122 and is screwed to the exhaust valve core 15 .

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

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. After the coil is energized, an electromagnetic force is generated, and the electromagnetic force is opposite to the elastic force, which can overcome the elastic force and drive the electromagnetic valve core 14 to move toward the air intake control unit 13 to open the electromagnetic valve and seal the first exhaust port at the same time.

Furthermore, the electromagnetic valve core 14 has a ventilation hole and a flow channel 143 inside, and the flow channel 143 communicates with the control gas exhaust port, so as to facilitate ventilation when the electromagnetic valve core 14 reciprocates in the second guide hole 112 .

Referring to Fig. 2 and Fig. 3 at the same time, in one embodiment, the outer wall of the intake control unit 13 away from the electromagnetic valve core 14 is in sealing connection with the inner wall of the electromagnetic housing 11, and the outer wall of the other side is spaced apart from the inner wall of the electromagnetic housing 11 to form a In the spaced channel A, the air intake control unit 13 is provided with an inner hole 131 on the side away from the electromagnetic valve core 14, and the inner hole 131 communicates with the spaced channel A through a small hole 132, so that the control gas enters the spaced channel A. The intake control unit 13 is provided with a second spring chamber 133 on a side close to the electromagnetic valve core 14 , and the second spring chamber 133 is provided with a second spring 134 and a first steel ball 135 sequentially. One end of the first steel ball 135 is used to compress the second spring 134, and the other end presses the neck structure 113 to form a sealing surface under the elastic force of the second spring 134, so as to isolate the control air between the interval channel A and the solenoid valve core 14. circulation.

Wherein, 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.

In the dual-propellant valve control system of the embodiment of the present invention, the inner hole 131 is used as the control gas inlet of the solenoid valve. After the control air enters the electromagnetic valve through the inner hole 131, it first enters the interval passage A through the small hole 132. When the air intake control unit 3 releases the seal on the neck structure, the control air in the interval passage A can enter the electromagnetic valve through the neck structure. Spool 14.

In one embodiment, after one end of the air intake control unit 13 provided with the inner hole 131 extends out of the first guide hole 111, it is fixedly connected to the electromagnetic housing 11 through the flange structure 135, so as to avoid the control air inlet end of the electromagnetic valve connected to the atmosphere. Wherein, the inner hole 131 is used to communicate with the control air inlet pipeline.

Referring to FIG. 1 and FIG. 2 at the same time, the control gas inlets of the fuel valve 2 and the oxygen valve 3 are respectively connected to the control gas outlet 121 of the solenoid valve 1 through the conduit 4 .

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

Referring to Fig. 1 and Fig. 4 at the same time, in the above embodiment, the fuel valve 2 includes a fuel valve housing 21, an air intake sealing unit 22, a piston 23, a third spring 24 and a long rod arranged inside the fuel valve housing 21 Spool 25. The fuel valve housing 21 is provided with a control air inlet 211 , a fuel passage inlet 212 and a fuel passage outlet 213 . The control air inlet 211 communicates with the conduit 4, the fuel inlet is used to communicate with the fuel inlet pipe for fuel to enter, and the fuel 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, the piston 23 arranged inside the fuel valve housing 21 is spaced from the air intake sealing unit 22 to form the first working chamber B, and the control air inlet 211 runs through the air intake sealing unit After 22, it communicates with the first working chamber B.

The outer wall on one side of the piston 23 close to the air intake sealing unit 22 is in dynamic and sealing connection 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 arranged in the third spring chamber 26. One end of the third spring 24 away from the air inlet sealing unit 22 abuts against the electromagnetic housing 21, and the other end compresses the dynamic sealing end of the piston 23 to provide the piston 23 with a direction toward the air inlet. The elastic force of the airtight unit 22.

The long stem spool 25 includes a connecting end 251 , a long stem 252 and a sealing end 253 which are sequentially connected. 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 in sealing connection with the inner wall of the fuel valve housing 21 , and the other side is connected to the inner wall of the fuel valve housing 21 to form a second working Cavity C. The second working chamber C communicates with the fuel channel inlet 212 and the fuel channel outlet 213 at the same time, and the sealing end 253 is arranged at the fuel channel outlet 213 . After the sealing end 253 seals the fuel passage outlet 213 , the second working chamber C only communicates with the fuel passage inlet 212 .

Referring to FIG. 1 , FIG. 4 and FIG. 5 at the same time, in order to increase the sealing performance of the fuel valve in the present invention, a first sealing ring 2521 can be provided at the sealing position between the long rod 252 and the inner wall of the fuel valve housing 21 .

Further, the connection end 251 of the long rod valve core 25 is screwed to the piston 23 . The sealing end 253 of the long stem spool 25 is inlaid with a non-metallic sealing surface, and the position where the fuel outlet 213 is used to connect with the sealing end 253 is provided with a metal sealing surface.

It should be noted that when the sealing end 253 of the long-stem valve core 25 seals the fuel passage outlet 213 , the fuel passage inlet is located approximately in the middle of the second working chamber C. Since the fuel path inlet 212 communicates with the second working chamber C, in order to avoid opening the fuel path outlet 213 under the pressure of the fuel, the fuel path inlet 212 can be used as the midpoint, so that the area of the cavity near the first sealing ring 2521 is the same as that near the first sealing ring 2521. The cavity areas on the side of the fuel passage outlet 213 are substantially equal. To ensure 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 .

Specifically, the axial diameters of the long rods 252 disposed in the second working chamber C can be made the same, and the diameter of the part of the inner wall of the electromagnetic housing forming 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 surface of the sealing end 253 and the fuel passage outlet 213 .

When the solenoid valve 1 is not energized, under the action of the elastic force of the third spring 24, the piston 23 applies a force towards the air intake sealing unit 22 to the long rod spool 25, so as to seal the fuel outlet 213 with the sealing end 253, That is, the fuel inlet and outlet are closed. The fuel valve pushes the piston under the action of the third spring so that the sealing end of the long rod valve and the inner wall of the casing (the outlet of the fuel passage) are in the closed position to stop, that is, the fuel inlet and outlet are closed, because the two sides of the fuel passage inlet 212 in the second working chamber C The working area is basically the same, and the valve medium cannot push the valve open under the action of the third spring force.

In the dual-propellant valve control system of the present invention, even if the working areas on both sides of the fuel passage inlet 212 in the second working chamber C are not exactly the same, the valve can still be kept closed under the elastic force of the third spring.

Referring to FIG. 5 , in the above embodiment, a piston sealing ring 231 is also provided at the position where the piston 23 is dynamically and sealingly connected to the inner wall of the fuel housing 21 .

Referring to FIG. 4 and FIG. 5 at the same time, in one embodiment, the air intake sealing unit 22 includes a retaining ring 221 and a blocking cover 222 . The outer wall of the blocking cover 222 is in sealing connection with the inner wall of the electromagnetic housing 21 , and the retaining ring 221 is arranged at the end of the electromagnetic housing 21 for clamping and fixing the blocking cover 222 on the electromagnetic housing. The control air inlet 211 passes through the retaining ring 221 and the blocking cover 222 and communicates with the first working chamber B.

Further, 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 .

In one embodiment, the third spring cavity 26 is also provided with a second exhaust port for discharging the medium in the cavity, and the second exhaust port is provided with a one-way valve 27, when the medium forms a certain pressure in the third spring cavity The rear check valve 27 can be opened and discharge the medium.

Referring to FIG. 5 and FIG. 6 at the same time, the one-way valve includes a one-way valve housing 271 disposed on the fuel valve housing 21 , a fourth spring chamber 272 , a fourth spring 273 and a second steel ball 274 . The outer wall of the one-way valve housing 271 away from the third spring chamber 26 is in sealing connection with 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 passage D. A fourth spring chamber 272 is provided inside the part of the one-way valve housing 271 spaced apart from 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 communicates the exhaust channel D with the fourth spring chamber 272 and the one-way valve outlet 275 .

The fourth spring 273 is disposed in the fourth spring cavity 272 , one end of the second steel ball 274 presses against the fourth spring 273 , and the other end presses against the second exhaust port under the elastic force of the fourth spring 273 to form a sealing surface. If the dynamic seal of the first sealing ring and the second sealing ring leaks slightly, the leakage medium can enter the fourth spring chamber 272, and after the leakage medium forms a certain pressure in the fourth spring chamber 272, it pushes the fourth steel ball away from the second exhaust and make the second exhaust port communicate with the exhaust passage D, the leakage medium will be discharged from the exhaust outlet 275 of the one-way valve after passing through the exhaust passage D, the small hole 276, and the fourth spring chamber 272, which can effectively prevent the fuel valve from A back pressure builds up inside that impedes valve action.

Further, under the condition of meeting the sealing specific pressure necessary to prevent water vapor in the air from entering the interior of the check valve, the force value of the fourth spring is designed to be small, and the leakage medium can open the check valve at a very low pressure.

The structure and composition of the oxygen valve and the fuel valve of the dual-propellant valve control system of the present invention are basically the same, and two valves can be controlled simultaneously by one electromagnetic valve.

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 to move to the direction of the control gas inlet under the action of the electromagnetic force. When the sealing surface is attached to the metal sealing surface of the solenoid valve cover, the solenoid valve core stops moving, and the exhaust valve core and the solenoid valve cover form a seal to cut off the control air flow between the internal flow channel of the solenoid 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 sealing surface of the electromagnetic housing (neck structure), and the inlet of the electromagnetic valve communicates with 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 through the inlet of the solenoid valve, the small hole of the intake control unit, the interval channel A, the inner flow channel of the solenoid valve core, and the outlet of the controller along the conduit. 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 down (away from the plug). When the piston moves down, it drives the long rod valve core down. Move until the lower end surface of the piston fits with the axial surface of the third spring cavity of the housing and stops moving. At this time, the non-metallic sealing surface of the long rod valve core sealing end is separated from the metal sealing surface of the housing respectively, the fuel path inlet and outlet are connected, the oxygen path inlet and outlet are connected, and the valves of the fuel valve and the oxygen valve are opened.

When it is necessary to close the valves of the oxygen valve and the fuel valve, the coil 2 can be powered off, and under the joint action of the medium force formed by the first spring and the control gas, the solenoid valve core moves to the end surface of the solenoid valve cover and stops moving. The boss end of the electromagnetic valve core is separated from the first steel ball, and the first steel ball moves to the sealing surface of the electromagnetic housing (neck structure) under the action of the second spring, that is, the control air inlet of the electromagnetic valve and the flow channel of the electromagnetic 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 electromagnetic valve cover (the sealing surface of the first exhaust outlet), and the first working chamber of the fuel valve and the oxygen valve communicates with the first exhaust outlet through the conduit, and the first The medium in the working chamber is discharged to the atmosphere through the first exhaust outlet to release the pressure. The fuel valve/oxygen valve pushes the piston under the action of the third spring to stop the long rod valve core and the propellant outlet at the closed position, that is, the fuel/oxygen inlet and outlet are closed.

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

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, can be applied to the engine propellant supply system, can simplify the structure of the engine supply system and the number of valves, and optimize The structural layout of the engine propellant supply system makes the overall structure simpler and the work more reliable.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. A double propellant valve control system, characterized in that it comprises: a solenoid valve, a fuel valve and an oxygen valve; the control gas outlet of the solenoid valve communicates with the control gas inlet of the fuel valve and the oxygen valve respectively ; The electromagnetic valve includes: an electromagnetic housing, an electromagnetic valve cover, an intake control unit, an electromagnetic valve core, an exhaust valve core and a force applying unit arranged on the electromagnetic housing; the electromagnetic valve cover is provided with the control an air 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; One side of the electromagnetic housing is provided with a first guide hole, and the other side is connected with the electromagnetic valve cover to form a second guide hole, and the first guide hole and the second guide hole are separated by a neck structure. open; The air intake control unit is arranged in the first guide hole for pressing 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 set on the periphery of the solenoid valve core; One end of the electromagnetic valve core close to the air intake control unit is provided with a boss, and the other end is provided with an extension rod, and the extension rod extends into the first exhaust port to connect with the exhaust valve core; When the electromagnetic valve is not energized, the force applying unit provides the electromagnetic valve core with a force away from the intake control unit, so that the intake control unit seals the neck structure, and the exhaust valve The core opens the first exhaust port, so that the control gas inlets of the oxygen valve and the fuel valve can respectively communicate with the first exhaust port through the control gas outlet; When the solenoid valve is energized, the force applying unit provides the solenoid valve core with a force close to the intake control unit, drives the exhaust valve core to seal the first exhaust port, and drives the intake valve core to seal the first exhaust port. The gas control unit unseals the neck structure so that the control gas enters the control gas inlets 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, wherein the force applying unit comprises a first spring and a coil; A shoulder is provided on the side of the solenoid valve close to the air intake control unit, and a first spring chamber is axially provided at a position corresponding to the shoulder of the solenoid housing, and the first spring is at least partially provided In the first spring cavity; the coil is arranged on 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 electromagnetic valve core away from the air intake control unit; when the coil is powered on, the electromagnetic force overcomes the spring force and drives the electromagnetic valve core close to The air intake control unit. 3. The dual-propellant valve control system according to claim 2, characterized in that, the solenoid valve core has air holes and flow passages for ventilation, so that the solenoid valve core can be carried out in the second guide hole. Ventilation during reciprocating motion. 4. The dual-propellant valve control system according to claim 3, characterized in that, the outer wall of the air intake control unit on the side away from the electromagnetic valve core is in sealing connection with the inner wall of the electromagnetic housing, and the outer wall on the other side spaced apart from the inner wall of the electromagnetic housing to form a spaced channel; The side of the air intake control unit away from the solenoid valve core is provided with an inner hole, and the inner hole communicates with the interval passage through a small hole, so that the control air enters the interval passage; The air intake control unit is provided with a second spring chamber on a side close to the electromagnetic valve core, and a second spring and a first steel ball are sequentially provided in the second spring chamber; one end of the first steel ball is used for The second spring is pressed, and the other end presses the neck structure under the elastic force of the second spring to form a sealing surface, so as to block the control air flow between the spacer channel and the electromagnetic valve core. 5. The dual-propellant valve control system according to claim 4, characterized in that, after one end of the inner hole of the air intake control unit protrudes from the first guide hole, the flange structure and the The electromagnetic shell is fixedly connected; The inner hole is used to communicate with the control air inlet pipeline. 6. The dual-propellant valve control system according to any one of claims 1 to 5, wherein the fuel valve comprises a fuel valve housing, an air intake sealing unit, and a piston, third spring and long stem spool; 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 is spaced from the air intake sealing unit to form a first working chamber; the control air inlet passes through the air intake sealing unit and connects with the air intake sealing unit. The first working chamber is connected; The outer wall on one side of the piston close to the air intake sealing unit is dynamically and sealingly connected with the inner wall of the fuel housing, and the outer wall on the other side forms a third spring cavity with the inner wall of the fuel valve housing, and the third spring is arranged on The third spring chamber is used to provide the piston with an elastic force toward the air intake sealing unit; The long rod spool includes a connecting end, a long rod and a sealing end connected in sequence; the connecting end is connected to the piston, and the side of the long rod close to the connecting end is sealingly connected to the inner wall of the fuel valve housing , the other side forms a second working chamber with the inner wall of the fuel valve housing; the second working chamber communicates with the fuel passage inlet and the fuel passage outlet at the same time, and the sealing end is arranged at the fuel passage outlet ; When the solenoid valve is not energized, under the action of the elastic force of the third spring, the piston exerts a force on the long stem valve core toward the air inlet sealing unit, so that the seal end can The outlet of the fuel passage is sealed. 7. The dual-propellant valve control system according to claim 6, wherein the air inlet sealing unit comprises a retaining ring and a blocking cover; the outer wall of the blocking cover is in sealing connection with the inner wall of the electromagnetic housing, and the A retaining ring is arranged at the end of the electromagnetic housing for clamping and fixing the blocking cover; the control air inlet passes through the retaining ring and the blocking cover and communicates with the first working chamber. 8. The dual-propellant valve control system according to claim 7, wherein the fuel valve housing is further provided with a one-way valve communicating with 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, wherein the one-way valve comprises a one-way valve housing disposed on the fuel valve housing, a fourth spring cavity, a fourth spring and second steel ball; The outer wall of the one-way valve housing away from the third spring chamber is in sealing connection with 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 channel; The fourth spring chamber is provided inside the part of the one-way valve housing spaced apart from the fuel valve housing, and the fourth spring chamber communicates 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 row under the action of the elastic force of the fourth spring. The air port forms a sealing surface; The side wall of the one-way valve housing is also provided with a small hole for exhaust; the small hole communicates the exhaust channel with the fourth spring chamber and the outlet of the one-way valve, so that the gas can pass through The one-way valve outlet discharges. 10. The dual-propellant valve control system according to claim 6, characterized in that a first sealing ring is provided at the position where the long rod is dynamically sealed, so as to prevent the control gas in the fourth spring chamber from seeping into the valve. Describe the second working chamber.

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