CN115539249A

CN115539249A - Double-propellant valve control system

Info

Publication number: CN115539249A
Application number: CN202211165020.5A
Authority: CN
Inventors: 王喜良
Original assignee: Landspace Technology Co Ltd
Current assignee: Landspace Technology Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-12-30

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

Double-propellant valve control system

Technical Field

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

Background

Many valves are required in the propellant supply system of liquid rocket engines to control the supply of propellant. In the prior art, control valves are often adopted in propellant supply systems of liquid rocket engines. The propellant supply system of the rocket engine is divided into a fuel path and an oxidizer path, and two electromagnetic valves are usually adopted to respectively control the on-off of liquid path valves of the fuel path and the oxidizer path. The scheme results in a large number of components in the propellant supply system, and is not beneficial to the miniaturization design of the liquid rocket engine.

Therefore, it is desirable to design a dual propellant valve control system that can control both the oxygen valve and the fuel valve using one solenoid valve.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a double propellant valve control system, which overcomes the defects in the prior art, and not only saves the occupied space and optimizes the spatial layout of an engine system, but also is beneficial to the miniaturization design of the engine system by simultaneously controlling two propellant circuit valves through one electromagnetic valve.

The invention provides a dual propellant valve control system, comprising: solenoid valves, fuel valves and oxygen valves; a control air outlet of the electromagnetic valve is communicated with control air inlets of the fuel valve and the oxygen valve respectively; the solenoid valve includes: the air inlet control device comprises an electromagnetic shell, an electromagnetic valve cover, an air inlet control unit, an electromagnetic valve core, an air exhaust valve core and a force application unit arranged on the electromagnetic shell; the electromagnetic valve cover is provided with the control gas outlet and the first exhaust port, and the exhaust valve core is arranged at the first exhaust port and used for forming a sealing surface with the inner wall of the first exhaust port; a first guide hole is formed in one side of the electromagnetic shell, the other side of the electromagnetic shell 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 through a neck structure; the air inlet control unit is arranged in the first guide hole and used 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 application unit is arranged on the periphery of the solenoid valve core; a boss is arranged at one end, close to the air inlet control unit, of the electromagnetic valve core, an extension rod is arranged at the other end of the electromagnetic valve core, and the extension rod extends into the first exhaust port and is connected with the exhaust valve core; when the electromagnetic valve is not electrified, the force application unit provides a force far away from the air inlet control unit for the electromagnetic valve core, so that the air inlet control unit seals the neck structure, the exhaust valve core opens the first exhaust port, and the control air inlet of the oxygen valve and the control air inlet of the fuel valve are communicated with the first exhaust port through the control air outlet respectively; when the electromagnetic valve is electrified, the force application unit provides a force close to the air inlet control unit for the electromagnetic valve core, the air outlet valve core is driven to seal the first air outlet, the air inlet control unit is driven to remove the seal of the neck structure, and therefore control air respectively enters the control air inlet of the oxygen valve and the control air inlet of the fuel valve through the control air outlet of the electromagnetic valve.

In one embodiment, the force application unit includes a first spring and a coil; a shoulder part is arranged on one side of the solenoid valve core close to the air inlet control unit, a first spring cavity is axially arranged at a position of the solenoid shell corresponding to the shoulder part, and at least part of the first spring is 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 electromagnetic valve core is pushed to be far away from the air inlet control unit by the elastic force of the first spring; when the coil is electrified, the electromagnetic force overcomes the spring force to drive the electromagnetic valve core to be close to the air inlet control unit.

In one embodiment, the solenoid valve core is internally provided with an air vent and a flow passage for ventilation when the solenoid valve core reciprocates in the second guide hole.

In one embodiment, the outer wall of the air inlet control unit, which is far away from one side of the electromagnetic valve core, is in sealing connection with the inner wall of the electromagnetic shell, and the outer wall of the other side of the air inlet control unit and the inner wall of the electromagnetic shell are arranged at intervals to form an interval channel; an inner hole is formed in one side, away from the electromagnetic valve core, of the air inlet control unit, and the inner hole is communicated with the spacing channel through a small hole so as to control air to enter the spacing channel; a second spring cavity is formed in one side, close to the electromagnetic valve core, of the air inlet control unit, and a second spring and a first steel ball are sequentially arranged in the second spring cavity; one end of the first steel ball is used for pressing the second spring, and the other end of the first steel ball presses the neck structure under the action of elastic force of the second spring to form a sealing surface so as to block the control air circulation of the spacing channel and the electromagnetic valve core.

In one embodiment, after one end of the air inlet control unit provided with the inner hole extends out of the first guide hole, the air inlet control unit is fixedly connected with the electromagnetic shell through a flange structure; the inner hole is used for being communicated with a control gas inlet pipeline.

In one embodiment, the fuel valve comprises a fuel valve housing, an air inlet sealing unit, and a piston, a third spring and a long rod valve core arranged inside the fuel valve housing; the fuel valve shell is provided with a control gas inlet, a fuel path inlet and a fuel path outlet; the air inlet sealing unit is arranged at one end of the fuel valve shell, and the piston and the air inlet sealing unit are arranged at intervals to form a first working cavity; the control air inlet penetrates through the air inlet sealing unit and then is communicated with the first working cavity; the outer wall of one side, close to the air inlet sealing unit, of the piston is in dynamic sealing connection with the inner wall of the fuel shell, the outer wall of the other side of the piston and the inner wall of the fuel valve shell form a third spring cavity, and the third spring is arranged in the third spring cavity and used for providing elastic force for the piston towards the air inlet sealing unit; the long rod valve core comprises a connecting end, a long rod and a sealing end which are connected in sequence; the connecting end is connected with the piston, one side of the long rod, close to the connecting end, is connected with the inner wall of the fuel valve shell in a sealing mode, and the other side of the long rod and the inner wall of the fuel valve shell form a second working cavity; the second working cavity 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 electromagnetic valve is not electrified, under the action of the elastic force of the third spring, the piston applies acting force towards the direction of the air inlet sealing unit to the long-rod valve core so as to seal the fuel passage outlet by using the sealing end.

In one embodiment, the air inlet sealing unit comprises a check ring and a plug cover; the outer wall of the blocking cover is hermetically connected with the inner wall of the electromagnetic shell, and the check ring is arranged at the end part of the electromagnetic shell and used for clamping and fixing the blocking cover; the control gas inlet penetrates through the retainer ring and the blocking cover and then is communicated with the first working cavity.

In one embodiment, the fuel valve housing is further provided with a check valve in communication with the second exhaust port of the third spring chamber; the one-way valve is used for discharging the medium in the third spring cavity.

In one embodiment, the check valve comprises a check valve housing disposed at the fuel valve housing, a fourth spring cavity, a fourth spring, and a second steel ball; the outer wall of one side of the one-way valve shell, which is far away from the third spring cavity, is in sealed connection with the inner wall of the fuel valve shell, and the outer wall of the other side of the one-way valve shell and the inner wall of the fuel valve shell are arranged at intervals to form an exhaust passage; the fourth spring cavity is arranged inside the part, arranged at an interval, of the one-way valve shell and the fuel valve shell, and the fourth spring cavity is communicated with an 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 of the second steel ball presses the second exhaust port under the elastic force action of the fourth spring to form a sealing surface; the side wall of the one-way valve shell is also provided with a small hole for exhausting; the small hole communicates the exhaust channel with the fourth spring cavity and the one-way valve outlet, so that gas can be discharged through the one-way valve outlet.

In one embodiment, the position of the long rod dynamic seal connection is further provided with a first sealing ring to prevent the control gas of the fourth spring cavity from permeating into the second working cavity.

The double-propellant valve control system provided by the embodiment of the invention can utilize one electromagnetic valve to simultaneously control the opening or closing of two paths of 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 has simpler integral structure and more reliable work.

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

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

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

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

Fig. 3 is a schematic structural diagram of the electromagnetic valve air inlet control unit part of the embodiment of the invention.

Fig. 4 is a schematic structural view 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 of an embodiment of the present invention.

Fig. 6 is a schematic view of the overall structure of the check valve according to the embodiment of the present invention.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. Spatial relationship terms such as "below," "at \8230," "lower," "above," "at \8230," "upper," "higher," and the like are used for convenience in description to explain the positioning of one element relative to a second element, indicating that the terms are intended to encompass different orientations of the device in addition to orientations different from those shown in the figures. Further, for example, the phrase "one element is over/under another element" may mean that the two elements are in direct contact, or that there is another element between the two elements. Furthermore, terms such as "first", "second", and the like, are also used to describe various elements, regions, sections, etc. and should not be taken as limiting. Like terms refer to like elements throughout the description.

Referring to fig. 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 electromagnetic valve 1 is respectively communicated with the control gas inlets of the fuel valve 2 and the oxygen valve 3, so that two paths of propellant valves can be simultaneously controlled by one electromagnetic valve.

Referring to fig. 1 and 2 together, the solenoid valve 1 includes a solenoid housing 11, a solenoid valve cover 12, an intake air control unit 13, a solenoid valve body 14, an exhaust valve body 15, and a force application unit 16 provided to the solenoid housing 11. The electromagnetic valve cover 12 is provided with a control gas outlet 121 and a first exhaust port 122, and the exhaust valve core 15 is arranged in the first exhaust port 122 and is used for forming 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, the end surface of the exhaust valve core 15 for sealing is inlaid with a non-metal sealing surface, and the non-metal sealing surface and the metal sealing surface can form a good sealing pair, so that the on-off between the internal flow channel of the electromagnetic valve and the first exhaust port 122 can be reliably realized.

One side of the solenoid 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. The intake control unit 13 is disposed in the first guide hole 111, and configured to press 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 core 14 is movably disposed in the second guide hole 112, and an axial outer wall of the solenoid core 14 is spaced apart from an outer wall of the second guide hole 112. The force application unit 16 is disposed on the periphery of the solenoid 14, and is configured to apply a sealing force (a force axially away from the intake air control unit 13) and a force for releasing the sealing (a force axially closer to the intake air control unit 13) to the solenoid 14.

The solenoid valve core 14 is provided with a boss 141 on one side close to the air inlet control unit 13, and an extending rod 142 on the other side, wherein the extending rod 142 extends into the first exhaust port 122 to be connected with the exhaust valve core 15.

The double-propellant valve control system provided by the embodiment of the invention has the advantages that the two-path propellant valve combination structure is controlled by one electromagnetic valve, and the structure of the supply system and the number of valves can be simplified after the double-propellant valve control system is applied to an engine propellant supply system. The electromagnetic valve is also provided with a first exhaust port communicated with the control gas outlet, so that the pressure of the control gas inlet end (control cavity) of the oxygen valve and the fuel valve can be conveniently relieved.

Specifically, after the valve assembly is completed, the fuel valve 2 and the oxygen valve 3 are in a closed state, the solenoid valve core 14 is close to 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, the extension rod 142 drives the exhaust valve core 15 to be separated 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 is kept in a closed state, the force applying unit 16 provides a force to the solenoid valve core 14 away from the air inlet control unit 13, so that the air inlet control unit 13 seals the neck structure 113, and the air outlet valve core 15 opens the first air outlet 122, thereby enabling the control air inlets of the fuel valve 2 and the oxygen valve 3 to be communicated with the first air outlet 122 through the control air outlet 121, respectively. At the same time, the inlet control unit 13 is also able to seal the neck structure 113 (control air inlet) of the solenoid valve 1.

When the electromagnetic valve 1 is powered on, the force applying unit 16 provides a force close to the air intake control unit 13 for the electromagnetic valve core 14, drives the electromagnetic valve core to move towards the air intake control unit, drives the air exhaust valve core 15 to seal the first air exhaust port 121, and drives the air intake control unit 13 to remove the seal of the neck structure 113, so that the control air respectively enters the control air inlets of the fuel valve 2 and the oxygen valve 3 through the control air outlet 112 of the electromagnetic valve 1, and the fuel valve 2 and the oxygen valve 3 are driven by the control air to realize valve opening.

Furthermore, a sealing gasket is arranged on a non-metal sealing surface of the exhaust valve core to improve the sealing effect.

Further, the protruding rod 142 protrudes into the first exhaust port 122 to be screwed with the exhaust valve core 15.

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

When the coil is not energized, the first spring 161 urges the solenoid case 14 away from the intake control unit 13 by the elastic force, keeping the solenoid closed. After the coil is electrified, electromagnetic force is generated, the direction of the electromagnetic force is opposite to that of the elastic force, the electromagnetic force can overcome the elastic force to drive the electromagnetic valve core 14 to move towards the air inlet control unit 13, the electromagnetic valve is opened, and meanwhile, the first exhaust port is sealed.

Further, the solenoid 14 has an air vent hole for ventilation and a flow passage 143, and the flow passage 143 communicates with the control gas exhaust port to facilitate ventilation when the solenoid 14 reciprocates in the second guide hole 112.

Referring to fig. 2 and fig. 3, in an embodiment, an outer wall of one side of the air inlet control unit 13, which is far away from the solenoid valve core 14, is hermetically connected with an inner wall of the solenoid housing 11, an outer wall of the other side is spaced from the inner wall of the solenoid housing 11 to form a spacing channel a, an inner hole 131 is arranged on one side of the air inlet control unit 13, which is far away from the solenoid valve core 14, and the inner hole 131 is communicated with the spacing channel a through a small hole 132, so that control air can enter the spacing channel a. A second spring cavity 133 is arranged at one side of the air inlet control unit 13 close to the solenoid valve core 14, and a second spring 134 and a first steel ball 135 are sequentially arranged in the second spring cavity 133. One end of the first steel ball 135 is used for pressing the second spring 134, and the other end of the first steel ball presses the neck structure 113 under the elastic force of the second spring 134 to form a sealing surface, so as to block the control air flow between the partition passage a and the solenoid valve core 14.

The sealing end of the neck structure 113 is matched with the surface of the first steel ball 135, so that the sealing area between the first steel ball and the neck structure is increased, and the sealing effect is improved.

The dual propellant valve control system of the embodiment of the invention uses the inner hole 131 as a control gas inlet of the electromagnetic valve. After entering the solenoid valve through the inner hole 131, the control gas firstly enters the partition passage a through the small hole 132, and when the air inlet control unit 3 releases the sealing of the neck structure, the control gas in the partition passage a can enter the solenoid valve core 14 through the neck structure.

In one embodiment, the end of the inlet control unit 13 with the inner hole 131 extends out of the first guiding hole 111, and is fixedly connected to the electromagnetic housing 11 through a flange structure 135, so as to prevent the inlet end of the control valve from being connected to the atmosphere. Wherein the inner bore 131 is adapted to communicate with a control gas inlet line.

Referring to fig. 1 and 2 together, 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 a conduit 4, respectively.

The above description is about the operation of the solenoid valve, the oxygen valve and the fuel valve as one scheme, but the solenoid valve of the present application can be used alone to output control gas and control other valves.

Referring to fig. 1 and 4 together, in the above embodiment, the fuel valve 2 includes the fuel valve housing 21, the intake sealing unit 22, and the piston 23, the third spring 24, and the long rod spool 25 provided inside the fuel valve housing 21. The fuel valve housing 21 is provided with a control gas inlet 211, a fuel passage inlet 212, and a fuel passage outlet 213. The control gas inlet 211 communicates with the conduit 4, the fuel path inlet is for communicating with the fuel inlet pipe for the admission of fuel, and the fuel path outlet is for discharging the fuel from the fuel valve. The air inlet sealing unit 22 is disposed at one end of the fuel valve housing 21, the piston 23 disposed inside the fuel valve housing 21 and the air inlet sealing unit 22 are disposed at an interval to form a first working chamber B, and the control air inlet 211 penetrates through the air inlet sealing unit 22 and then is communicated with the first working chamber B.

The outer wall of the piston 23 near the inlet seal unit 22 is connected with the inner wall of the fuel housing 21 in a dynamic seal manner, and the outer wall of the other side and the inner wall of the fuel housing 21 form a third spring chamber 26. The third spring 24 is disposed in the third spring cavity 26, one end of the third spring 24, which is far away from the intake sealing unit 22, abuts against the electromagnetic housing 21, and the other end presses the dynamic sealing end of the piston 23, so as to provide an elastic force to the piston 23 towards the intake sealing unit 22.

The long rod valve core 25 comprises a connecting end 251, a long rod 252 and a sealing end 253 which are connected in sequence. The connecting end 251 is connected with one side of the piston far away from the air inlet sealing unit 22, one side of the long rod 252 close to the connecting end 251 is connected with the inner wall of the fuel valve shell 21 in a sealing way, and the other side and the inner wall of the fuel valve shell 21 form a second working chamber C. The second working chamber C communicates with both the fuel passage inlet 212 and the fuel passage outlet 213, and the seal end 253 is provided at the fuel passage outlet 213. When the sealing end 253 seals the fuel passage outlet 213, the second working chamber C communicates only with the fuel passage inlet 212.

Referring to fig. 1, 4 and 5, in order to increase the sealing performance of the fuel valve, a first sealing ring 2521 may be disposed at a position where the rod 252 seals with the inner wall of the fuel valve housing 21.

Further, the connection end 251 of the long rod spool 25 is threadedly connected to the piston 23. The sealing end 253 of the long-rod valve core 25 is inlaid with a non-metal sealing surface, and a metal sealing surface is arranged at the position of the fuel passage outlet 213 for butting with the sealing end 253.

In particular, in a state where the seal end 253 of the long rod spool 25 seals the fuel passage outlet 213, the fuel passage inlet is located at a position approximately in the middle of the second working chamber C. Since the fuel path inlet 212 communicates with the second working chamber C, the cavity area on the side closer to the first seal 2521 and the cavity area on the side closer to the fuel path outlet 213 may be made substantially equal to each other with the fuel path inlet 212 as the midpoint in order to avoid opening the fuel path outlet 213 under the pressure of the fuel. To ensure that the pressure exerted on the first sealing ring 2521 is equal to the pressure exerted on the sealing end 253 after the fuel propellant has entered the second working chamber C.

Specifically, the axial diameter of the long rod 252 disposed in the second working chamber C may be made the same, and the diameter of the portion of the inner wall of the electromagnetic housing forming the second working chamber C may be made the same. When a transition surface is provided between the first sealing ring 2521 and the long rod 252, the transition surface having the same gradient is correspondingly provided between the sealing surface of the sealing end 253 and the fuel passage outlet 213.

When the electromagnetic valve 1 is not energized, the piston 23 applies a force toward the intake sealing unit 22 to the long-rod valve element 25 by the elastic force of the third spring 24, so as to seal the fuel passage outlet 213, i.e., close the fuel inlet and outlet, with the sealing end 253. The fuel valve pushes the piston under the action of the third spring to enable the sealing end of the long rod valve and the inner wall (the fuel path outlet) of the shell to be in a closed position and stop, namely the fuel inlet and the fuel outlet are closed, and because the working areas of two sides of the fuel path inlet 212 in the second working cavity C are basically the same, the valve medium cannot push the valve open under the action of the third spring.

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

Referring to fig. 5, in the above embodiment, a piston sealing ring 231 is further disposed at a position where the piston 23 is in dynamic sealing connection with the inner wall of the fuel housing 21.

Referring to fig. 4 and 5 together, in one embodiment, the inlet seal unit 22 includes a retainer ring 221 and a cap 222. The outer wall of the blocking cover 222 is connected with the inner wall of the electromagnetic shell 21 in a sealing manner, and the retaining ring 221 is arranged at the end of the electromagnetic shell 21 and used for clamping and fixing the blocking cover 222 on the electromagnetic shell. The control gas inlet 211 penetrates through the retainer ring 221 and the blocking cover 222 and then is communicated 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 disposed between the outer wall of the blocking cover 222 and the inner wall of the electromagnetic housing 21.

In one embodiment the third spring chamber 26 is further provided with a second exhaust port for discharging the medium in the chamber, the second exhaust port being provided with a non-return valve 27, the non-return valve 27 being able to open and discharge the medium after a certain pressure of the medium has been built up in the third spring chamber.

Referring to fig. 5 and 6 together, the check valve includes a check valve housing 271 provided to the fuel valve housing 21, a fourth spring chamber 272, a fourth spring 273, and a second steel ball 274. The outer wall of one side of the check valve housing 271, which is far away from the third spring cavity 26, is connected with the inner wall of the fuel valve housing 21 in a sealing manner, and the outer wall of the other side is arranged at an interval with the inner wall of the fuel valve housing 21 to form an exhaust passage D. The check valve housing 271 and the fuel valve housing 21 are provided with a fourth spring chamber 272 inside the spaced portion, and the fourth spring chamber 272 is also communicated with the outlet port 275 of the check valve 27. The side wall of the check valve housing 271 is also provided with an orifice 276 for venting gas, the orifice 276 communicating the vent passage D with the fourth spring chamber 272 and the check valve outlet 275.

The fourth spring 273 is disposed in the fourth spring chamber 272, and one end of the second steel ball 274 presses the fourth spring 273, and the other end presses 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 generates micro leakage, the leakage medium can enter the fourth spring cavity 272, after the leakage medium forms a certain pressure in the fourth spring cavity 272, the fourth steel ball is pushed to be away from the second exhaust port, the second exhaust port is communicated with the exhaust channel D, the leakage medium is exhausted from the exhaust outlet 275 of the one-way valve after passing through the exhaust channel D, the small hole 276 and the fourth spring cavity 272, and the back pressure blocking the action of the valve can be effectively avoided from being formed in the fuel valve.

Further, the fourth spring force value is designed to be small under the condition that the sealing ratio necessary for preventing the water vapor in the air from entering the interior of the check valve is satisfied, and the leakage medium can open the check valve under the very low pressure.

The oxygen valve and the fuel valve of the double propellant valve control system have basically the same structure composition, and one electromagnetic valve can be used for simultaneously controlling the two valves.

When the double propellant valve control system starts to work, the coil is electrified to generate electromagnetic force, the electromagnetic valve core overcomes the acting force of the first spring to move towards the direction of the control gas inlet under the action of the electromagnetic force, when the non-metal sealing surface of the exhaust valve core is attached to 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 sealing to cut off the control gas circulation between the internal flow passage of the electromagnetic valve and the exhaust port. Meanwhile, the boss end of the electromagnetic valve core contacts the first steel ball and drives the first steel ball to move, so that the first steel ball is separated from the sealing surface (neck structure) of the electromagnetic shell, and the inlet of the electromagnetic valve is communicated with the flow channel of the electromagnetic valve core. The control gas flows into the first working cavities of the fuel valve and the oxygen valve along the guide pipe through the inlet of the electromagnetic valve, the small hole of the air inlet control unit, the spacing channel A, the internal flow channel of the electromagnetic valve core and the outlet of the controller. The first working chamber is a control chamber of the fuel valve and the oxygen valve, the control gas forms acting force in the first working chamber to overcome the acting force of the third spring to push the piston to move downwards (away from the blanking cover), and the piston drives the long rod valve core to move downwards when moving downwards until the lower end surface of the piston is jointed with the axial surface of the third spring chamber arranged on the shell to stop moving. At the moment, the non-metal sealing surface of the long rod valve core sealing end is separated from the metal sealing surface of the shell, the inlet and the outlet of the fuel path are communicated, the inlet and the outlet of the oxygen path are communicated, and the fuel valve and the oxygen valve are opened.

When the valves of the oxygen valve and the fuel valve need to be closed, the coil 2 can be powered off, the electromagnetic valve core moves to be attached to the end face of the electromagnetic valve cover and then stops moving under the combined action of the first spring and the medium force formed by the control gas, the boss end of the electromagnetic valve core is separated from the first steel ball, the first steel ball moves to the sealing surface (neck structure) of the electromagnetic shell under the action of the second spring, namely, the control gas inlet of the electromagnetic valve is closed with the flow channel of the electromagnetic valve core, and therefore, the electromagnetic valve is closed. At the moment, the nonmetal sealing surface of the exhaust valve core is separated from the metal sealing surface (sealing surface of a first exhaust outlet) of the electromagnetic valve cover, the first working cavities of the fuel valve and the oxygen valve are communicated with the first exhaust outlet through a guide pipe, and a medium in the first working cavity is exhausted to the atmosphere through the first exhaust outlet so as to be decompressed. The fuel/oxygen valve pushes the piston under the action of the third spring to stop the long-rod valve core and the propellant outlet at a closed position, namely the fuel/oxygen inlet and the fuel/oxygen outlet are closed.

The above-described embodiments of the present invention may be combined with each other with corresponding technical effects.

The double-propellant valve control system can utilize one electromagnetic valve to simultaneously control the opening or closing of two paths of 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.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A dual propellant valve control system comprising: solenoid valves, fuel valves and oxygen valves; a control gas outlet of the electromagnetic valve is communicated with a control gas inlet of the fuel valve and a control gas inlet of the oxygen valve respectively;

the solenoid valve includes: the air inlet control device comprises an electromagnetic shell, an electromagnetic valve cover, an air inlet control unit, an electromagnetic valve core, an air exhaust valve core and a force application unit arranged on the electromagnetic shell; the electromagnetic valve cover is provided with the control gas outlet and the first exhaust port, and the exhaust valve core is arranged at the first exhaust port and used for forming a sealing surface with the inner wall of the first exhaust port;

a first guide hole is formed in one side of the electromagnetic shell, the other side of the electromagnetic shell 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 through a neck structure;

the air inlet control unit is arranged in the first guide hole and used 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 application unit is arranged on the periphery of the solenoid valve core;

a boss is arranged at one end of the electromagnetic valve core close to the air inlet control unit, an extension rod is arranged at the other end of the electromagnetic valve core, and the extension rod extends into the first exhaust port and is connected with the exhaust valve core;

when the electromagnetic valve is not electrified, the force application unit provides a force far away from the air inlet control unit for the electromagnetic valve core, so that the air inlet control unit seals the neck structure, the exhaust valve core opens the first exhaust port, and the control air inlet of the oxygen valve and the control air inlet of the fuel valve are communicated with the first exhaust port through the control air outlet respectively;

when the electromagnetic valve is electrified, the force application unit provides a force close to the air inlet control unit for the electromagnetic valve core, the air outlet valve core is driven to seal the first air outlet, the air inlet control unit is driven to remove the seal of the neck structure, and therefore control air respectively enters the control air inlet of the oxygen valve and the control air inlet of the fuel valve through the control air outlet of the electromagnetic valve.

2. The dual propellant valve control system of claim 1 wherein the force application unit comprises a first spring and a coil;

a shoulder is arranged on one side, close to the air inlet control unit, of the solenoid valve core, a first spring cavity is axially arranged at a position, corresponding to the shoulder, of the solenoid shell, and at least part of the first spring is 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 electromagnetic valve core is pushed to be away from the air inlet control unit by the elastic force of the first spring; when the coil is electrified, the electromagnetic force overcomes the spring force to drive the electromagnetic valve core to be close to the air inlet control unit.

3. The dual propellant valve control system of claim 2 wherein the solenoid spool has vent and flow passages therein to facilitate venting of the solenoid spool during reciprocating movement within the second pilot bore.

4. The dual propellant valve control system of claim 3, wherein the outer wall of the inlet control unit on the side away from the solenoid valve core is in sealing connection with the inner wall of the solenoid housing, and the outer wall on the other side is spaced from the inner wall of the solenoid housing to form a spaced channel;

an inner hole is formed in one side, away from the electromagnetic valve core, of the air inlet control unit, and the inner hole is communicated with the spacing channel through a small hole so as to control air to enter the spacing channel;

a second spring cavity is formed in one side, close to the electromagnetic valve core, of the air inlet control unit, and a second spring and a first steel ball are sequentially arranged in the second spring cavity; one end of the first steel ball is used for pressing the second spring, and the other end of the first steel ball presses the neck structure under the action of elastic force of the second spring to form a sealing surface so as to block the control air circulation of the spacing channel and the electromagnetic valve core.

5. The dual propellant valve control system of claim 4, wherein the end of the inlet control unit having the inner bore extends out of the first guiding hole and is fixedly connected to the solenoid housing by a flange structure;

the inner hole is used for being communicated with a control gas inlet pipeline.

6. The dual propellant valve control system of any of claims 1 to 5 wherein the fuel valve includes a fuel valve housing, an inlet air seal unit, and a piston, a third spring and a long stem spool disposed inside the fuel valve housing;

the fuel valve shell is provided with a control gas inlet, a fuel path inlet and a fuel path outlet;

the air inlet sealing unit is arranged at one end of the fuel valve shell, and the piston and the air inlet sealing unit are arranged at intervals to form a first working cavity; the control air inlet penetrates through the air inlet sealing unit and then is communicated with the first working cavity;

the outer wall of one side of the piston, which is close to the air inlet sealing unit, is in dynamic sealing connection with the inner wall of the fuel shell, the outer wall of the other side of the piston and the inner wall of the fuel valve shell form a third spring cavity, and the third spring is arranged in the third spring cavity and used for providing elastic force towards the air inlet sealing unit for the piston;

the long rod valve core comprises a connecting end, a long rod and a sealing end which are connected in sequence; the connecting end is connected with the piston, one side of the long rod, close to the connecting end, is connected with the inner wall of the fuel valve shell in a sealing mode, and the other side of the long rod and the inner wall of the fuel valve shell form a second working cavity; the second working cavity 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;

7. The dual propellant valve control system of claim 6, wherein the inlet sealing unit comprises a retainer ring and a blanking cap; the outer wall of the blocking cover is hermetically connected with the inner wall of the electromagnetic shell, and the check ring is arranged at the end part of the electromagnetic shell and used for clamping and fixing the blocking cover; the control air inlet penetrates through the check ring and the blocking cover and then is communicated with the first working cavity.

8. The dual propellant valve control system of claim 7 wherein the fuel valve housing is further provided with a one way valve in communication with the second exhaust port of the third spring chamber; the one-way valve is used for discharging the medium in the third spring cavity.

9. The dual propellant valve control system of claim 8, wherein the check valve includes a check valve housing disposed at the fuel valve housing, a fourth spring cavity, a fourth spring, and a second steel ball;

the outer wall of one side of the one-way valve shell, which is far away from the third spring cavity, is hermetically connected with the inner wall of the fuel valve shell, and the outer wall of the other side of the one-way valve shell and the inner wall of the fuel valve shell are arranged at intervals to form an exhaust channel; the fourth spring cavity is arranged inside the part, arranged at an interval, of the one-way valve shell and the fuel valve shell, and the fourth spring cavity is communicated with an 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 of the second steel ball presses the second exhaust port under the elastic force action of the fourth spring to form a sealing surface;

the side wall of the one-way valve shell is also provided with a small hole for exhausting; the small hole communicates the exhaust channel with the fourth spring cavity and the one-way valve outlet, so that gas can be exhausted through the one-way valve outlet.

10. The dual propellant valve control system of claim 6 wherein the position of the long rod dynamic seal connection is further provided with a first sealing ring to prevent the control gas of the fourth spring chamber from permeating into the second working chamber.