A fast-response high-pressure large-flow valve and a control valve for a liquid rocket engine

Abstract

The present invention discloses a fast-response high-pressure large-flow valve, which includes a secondary valve body and a secondary spool control cavity opened in the secondary valve body. A control air inlet and a control air outlet are also opened on the secondary valve body, and the control air inlet and the control air outlet are respectively communicated with the secondary spool control cavity. The fast-response high-pressure large-flow valve further includes an electromagnetic secondary valve and a pneumatic secondary valve coaxially installed in the secondary spool control cavity. The electromagnetic secondary valve is used to drive the opening and closing of the pneumatic secondary valve to control the opening and closing of the control air outlet; the present invention adopts a three-stage electro-pneumatic valve structure scheme, and the secondary valve is in a two-stage structural form, including a first-stage electromagnetic secondary valve and a second-stage pneumatic secondary valve. The secondary valve in the two-stage structural form can use the first-stage electromagnetic secondary valve to first drive the opening and closing of the second-stage pneumatic secondary valve, and then use the second-stage secondary valve to drive the opening and closing of the main valve spool, thereby improving the intake and exhaust flow capacity of the entire secondary valve to improve the opening and closing response speed of the main valve.

Description

Technical Field

[0001] The present invention relates to the field of liquid rocket engines, and particularly to a fast-response high-pressure large-flow valve and a control valve for a liquid rocket engine. Background Art

[0002] A certain new large-thrust liquid rocket engine needs to be equipped with an engine control valve to control the supply of the engine propellant. According to the relevant technical requirements put forward by the power system, the flow rate of the engine control valve needs to reach 4.5 kg / s, the working pressure is 10 MPa, the opening and closing response times are both required to be no greater than 10 ms, and the working mode is to open when powered on and close when powered off.

[0003] There is no available mature product in the country. The control valves of existing engines of this thrust level have a slow response speed and cannot meet the design requirements, and the gap is very large.

[0004] There are reports in foreign literature on relevant information about similar engine control valves, but no specific structure and specific technical solutions of any engine control valve are disclosed. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a fast-response high-pressure large-flow valve and a control valve for a liquid rocket engine to solve the problem of slow opening and closing response speed of the control valve in the existing technology.

[0006] To solve the above technical problems, the present invention is implemented by adopting the following technical solutions: A fast-response high-pressure large-flow valve includes a secondary valve body and a secondary spool control cavity opened in the secondary valve body. A control gas inlet and a control gas outlet are further opened on the secondary valve body, and the control gas inlet and the control gas outlet are respectively communicated with the secondary spool control cavity;

[0007] The fast-response high-pressure large-flow valve further includes an electromagnetic sub-valve and a pneumatic sub-valve coaxially installed in the secondary spool control cavity. The electromagnetic sub-valve is used to drive the opening and closing of the pneumatic sub-valve to control the opening and closing of the control gas outlet;

[0008] The electromagnetic sub-valve includes an electromagnetic sub-valve bottom sealing seat installed at one end of the secondary spool control cavity and an electromagnetic sub-valve seat installed on the electromagnetic sub-valve bottom sealing seat;

[0009] An electromagnetic sub-valve spool is installed in the electromagnetic sub-valve seat. An electromagnetic sub-valve coil is installed between the electromagnetic sub-valve bottom sealing seat, the electromagnetic sub-valve seat and the secondary valve body. The electromagnetic sub-valve coil is used to control the movement of the electromagnetic sub-valve spool in the electromagnetic sub-valve seat;

[0010] An electromagnetic sub-valve exhaust channel is penetrated through the electromagnetic sub-valve spool, and the electromagnetic sub-valve exhaust channel communicates with both ends of the electromagnetic sub-valve spool;

[0011] One end of the described electromagnetic sub-valve seat facing away from the electromagnetic sub-valve bottom seal seat is also provided with an electromagnetic sub-valve intake end valve seat;

[0012] The described electromagnetic sub-valve intake end valve seat is provided with a control air groove along the circumferential direction. One end of the electromagnetic sub-valve intake end valve seat facing away from the electromagnetic sub-valve spool is provided with a pneumatic sub-valve spool control cavity along the axial direction. The position of the control air groove corresponds to the position of the control air inlet;

[0013] The electromagnetic sub-valve spool can respectively form a sealing pair with the electromagnetic sub-valve bottom seal seat or the electromagnetic sub-valve intake end valve seat;

[0014] The described electromagnetic sub-valve intake end valve seat is provided with an electromagnetic sub-valve intake passage, and the electromagnetic sub-valve intake passage is used to connect the control air inlet and the pneumatic sub-valve so that the control air can push the pneumatic sub-valve to move to control the opening and closing of the control air inlet;

[0015] The described pneumatic sub-valve includes a pneumatic sub-valve intake end valve seat and a pneumatic sub-valve exhaust end valve seat that are sequentially installed in the sub-valve spool control cavity, and also includes a pneumatic sub-valve spool installed in the pneumatic sub-valve intake end valve seat and the pneumatic sub-valve exhaust end valve seat;

[0016] One end of the described pneumatic sub-valve spool extends into the pneumatic sub-valve spool control cavity;

[0017] The pneumatic sub-valve spool can respectively form a sealing pair with the pneumatic sub-valve exhaust end valve seat or the pneumatic sub-valve intake end valve seat;

[0018] The described pneumatic sub-valve intake end valve seat is provided with an air outlet, and the position of the air outlet corresponds to the position of the control air outlet. The pneumatic sub-valve spool controls the opening and closing of the air outlet to control the opening and closing of the control air outlet;

[0019] The present invention also has the following technical features:

[0020] The described electromagnetic sub-valve intake end valve seat includes a first electromagnetic sub-valve intake end valve seat and a second electromagnetic sub-valve intake end valve seat that are coaxially connected. Both the first electromagnetic sub-valve intake end valve seat and the second electromagnetic sub-valve intake end valve seat are cylindrical, and the diameter of the first electromagnetic sub-valve intake end valve seat is smaller than the diameter of the second electromagnetic sub-valve intake end valve seat;

[0021] The described control air groove is opened on the second electromagnetic sub-valve intake end valve seat, and the pneumatic sub-valve spool control cavity is axially opened at one end of the second electromagnetic sub-valve intake end valve seat.

[0022] The described pneumatic sub-valve intake end valve seat includes a pneumatic sub-valve intake end valve seat body and a limiting ring installed on the inner wall of the pneumatic sub-valve intake end valve seat body. The pneumatic sub-valve intake end valve seat body is a hollow cylinder, and a pneumatic sub-valve spool accommodation cavity is formed inside;

[0023] The described air outlet is arranged on the pneumatic sub-valve intake end valve seat body;

[0024] The exhaust end valve seat of the pneumatic sub-valve includes a pneumatic sub-valve exhaust end valve seat body, a pneumatic sub-valve spool passage axially opened on the pneumatic sub-valve exhaust end valve seat body, and an exhaust passage opened around the pneumatic sub-valve spool passage;

[0025] The pneumatic sub-valve spool includes a first spool, a first connection section, a second spool, and a second connection section connected in sequence;

[0026] The first spool is located in the pneumatic sub-valve spool control cavity, the second spool is located in the pneumatic sub-valve spool accommodation cavity, and the second connection section passes through the pneumatic sub-valve spool passage and is connected to a reset device installed at the other end of the sub-valve spool control cavity. The reset device is used to provide a reset force for the pneumatic sub-valve spool.

[0027] The pneumatic sub-valve spool control cavity includes a first pneumatic sub-valve spool control cavity and a second pneumatic sub-valve spool control cavity that are connected. The first pneumatic sub-valve spool control cavity is a cylindrical shape with one end closed, and the second pneumatic sub-valve spool control cavity is a frustum shape. The end with a smaller diameter of the second pneumatic sub-valve spool control cavity is connected to the first pneumatic sub-valve spool control cavity;

[0028] The electromagnetic sub-valve air inlet passage includes a first electromagnetic sub-valve air inlet passage, a second electromagnetic sub-valve air inlet passage, and a third electromagnetic sub-valve air inlet passage;

[0029] The first electromagnetic sub-valve air inlet passage communicates with the control air groove and the end face of the first electromagnetic sub-valve air inlet seat facing away from the second electromagnetic sub-valve air inlet seat;

[0030] The second electromagnetic sub-valve air inlet passage communicates with the first pneumatic sub-valve spool control cavity and the end face of the first electromagnetic sub-valve air inlet seat facing away from the second electromagnetic sub-valve air inlet seat;

[0031] The third electromagnetic sub-valve air inlet passage communicates with the control air groove and the second pneumatic sub-valve spool control cavity.

[0032] An electromagnetic sub-valve exhaust port is opened on the electromagnetic sub-valve bottom sealing seat, and the electromagnetic sub-valve exhaust port communicates the sub-valve spool control cavity with the external environment;

[0033] A spring installation groove is opened on the electromagnetic sub-valve bottom sealing seat facing the electromagnetic sub-valve spool. An electromagnetic sub-valve spring is arranged in the spring installation groove, and the electromagnetic sub-valve spring is connected to the electromagnetic sub-valve spool.

[0034] The reset device includes a spring sleeve installed at the other end of the sub-valve spool control cavity and a pneumatic sub-valve spring installed in the spring sleeve. The pneumatic sub-valve spring is connected to one end of the second connection section passing through the pneumatic sub-valve spool passage through a spring seat;

[0035] The described spring sleeve has a hollow structure, with one end open and the other end closed. The open end is connected to the exhaust end valve seat of the pneumatic sub-valve, and an exhaust port is provided on the closed end.

[0036] The pneumatic sub-valve spring is connected to the spring sleeve through an adjusting gasket.

[0037] The present invention also provides a control valve for a liquid rocket engine, which includes a main valve and also includes the above-mentioned fast-response high-pressure large-flow valve; the fast-response high-pressure large-flow valve is communicated with the main valve.

[0038] The main valve includes a main valve body. A main spool control cavity is provided in the main valve body. A main valve seat is installed in the main spool control cavity, and a main spool is sleeved inside the main valve seat.

[0039] A main valve inlet and a main valve outlet are also provided at the bottom end of the main valve body. The main spool controls the opening and closing of the main valve outlet. A sub-valve air inlet is provided at the top end of the main valve body.

[0040] The control air outlet is communicated with the main spool control cavity through the sub-valve air inlet.

[0041] Compared with the prior art, the present invention has the following technical effects:

[0042] (Ⅰ) The secondary pneumatic sub-valve of the present invention adopts a full unloading structure, and the spool is basically not affected by the medium pressure, which can maximize the opening and closing response speed of the pneumatic sub-valve spool; to meet the adaptability of the secondary pneumatic sub-valve to different working pressure conditions, the installation force of the return spring can be adjusted by selecting different thickness adjusting gaskets, so that the secondary pneumatic sub-valve can meet the fast-response matching under different working pressures. To improve the response speed of the secondary pneumatic sub-valve, on the premise of ensuring sufficient opening margin, the area of the piston driving the secondary pneumatic sub-valve spool is reduced as much as possible in the structural design, the piston chamber volume is reduced, and the speed of high-pressure gas entering the piston chamber is increased, ultimately achieving the design goal of improving the response speed of the secondary pneumatic sub-valve.

[0043] (Ⅱ) The present invention adopts a three-stage electro-pneumatic valve structure scheme. The sub-valve has a two-stage structure form, including a primary electromagnetic sub-valve and a secondary pneumatic sub-valve. The two-stage structure form of the sub-valve can use the primary electromagnetic sub-valve to drive the opening and closing of the secondary pneumatic sub-valve first, and then use the secondary sub-valve to drive the opening and closing of the main valve spool, thereby improving the air intake and exhaust flow capacity of the entire sub-valve and improving the opening and closing response speed of the main valve.

[0044] (Ⅲ) The scheme of the present invention is reasonable, the structure is simple, and it is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall structure of the fast-response high-pressure large-flow valve of the present invention;

[0046] Figure 2 It is a schematic diagram of the intake end valve seat structure of the electromagnetic sub-valve of the present invention;

[0047] Figure 3 It is a schematic diagram of the control valve structure of the liquid rocket engine of the present invention;

[0048] The meanings of the various reference numerals in the drawings:

[0049] 1 - main valve; 2 - fast-response high-pressure large-flow valve; 3 - electromagnetic sub-valve; 4 - pneumatic sub-valve; 5 - control gas inlet; 6 - control gas outlet; 7 - inner main spring; 8 - outer main spring; 9 - rubber O-ring;

[0050] 1-1 main valve body, 1-2 main spool control cavity, 1-3 main valve seat, 1-4 main spool, 1-5 main valve inlet, 1-6 main valve outlet, 1-7 sub-valve gas inlet

[0051] 2-1 sub-valve body, 2-2 sub-spool control cavity;

[0052] 3-1 electromagnetic sub-valve bottom seal seat, 3-2 electromagnetic sub-valve seat, 3-3 electromagnetic sub-valve spool, 3-4 electromagnetic sub-valve coil, 3-5 electromagnetic sub-valve exhaust passage, 3-6 electromagnetic sub-valve intake end valve seat, 3-7 control gas groove, 3-8 pneumatic sub-valve spool control cavity, 3-9 electromagnetic sub-valve intake passage, 3-10 first electromagnetic sub-valve intake end valve seat, 3-11 second electromagnetic sub-valve intake end valve seat, 3-12 first pneumatic sub-valve spool control cavity, 3-13 second pneumatic sub-valve spool control cavity, 3-14 first electromagnetic sub-valve intake passage, 3-15 second electromagnetic sub-valve intake passage, 3-16 third electromagnetic sub-valve intake passage, 3-17 electromagnetic sub-valve exhaust port, 3-18 spring installation groove, 3-19 electromagnetic sub-valve spring;

[0053] 4-1 pneumatic sub-valve intake end valve seat, 4-2 pneumatic sub-valve exhaust end valve seat, 4-3 pneumatic sub-valve spool, 4-4 air outlet, 4-5 pneumatic sub-valve intake end valve seat body, 4-6 limit ring, 4-7 pneumatic sub-valve spool accommodation cavity, 4-8 pneumatic sub-valve exhaust end valve seat body, 4-9 pneumatic sub-valve spool passage, 4-10 exhaust passage, 4-11 first spool, 4-12 first connecting section, 4-13 second spool, 4-14 second connecting section, 4-15 reset device, 4-16 spring sleeve, 4-17 pneumatic sub-valve spring, 4-18 spring seat, 4-19 exhaust port, 4-20 adjusting gasket.

[0054] The following further elaborates on the specific content of the present invention in conjunction with embodiments. Specific embodiments

[0055] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present invention.

[0056] The terms "upper", "lower", "front", "rear", "top", "bottom", etc. used in the present invention to indicate the orientation or position relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "Inner" and "outer" refer to the inside and outside of the contour of the corresponding component, and the above terms should not be construed as limiting the present invention.

[0057] In the present invention, unless otherwise stated, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] All components in the present invention, unless otherwise specified, are all components known in the prior art.

[0059] Embodiment 1:

[0060] Complying with the above technical solution, as Figure 1 - Figure 2 shown, a fast-response high-pressure large-flow valve 2 includes a secondary valve body 2-1 and a secondary spool control cavity 2-2 opened in the secondary valve body 2-1. A control air inlet 5 and a control air outlet 6 are also opened on the secondary valve body 2-1, and the control air inlet 5 and the control air outlet 6 are respectively communicated with the secondary spool control cavity 2-2.

[0061] The fast-response high-pressure large-flow valve 2 further includes an electromagnetic sub-valve 3 and a pneumatic sub-valve 4 coaxially installed in the secondary spool control cavity 2-2. The electromagnetic sub-valve 3 is used to drive the opening and closing of the pneumatic sub-valve 4 to control the opening and closing of the control air outlet 6.

[0062] The electromagnetic sub-valve 3 includes an electromagnetic sub-valve bottom seal seat 3-1 installed at one end of the secondary spool control cavity 2-2 and an electromagnetic sub-valve seat 3-2 installed on the electromagnetic sub-valve bottom seal seat 3-1.

[0063] An electromagnetic sub-valve spool 3-3 is installed in the electromagnetic sub-valve seat 3-2. An electromagnetic sub-valve coil 3-4 is installed between the electromagnetic sub-valve bottom seal seat 3-1, the electromagnetic sub-valve seat 3-2 and the secondary valve body 2-1. The electromagnetic sub-valve coil 3-4 is used to control the movement of the electromagnetic sub-valve spool 3-3 in the electromagnetic sub-valve seat 3-2.

[0064] An electromagnetic sub-valve exhaust passage 3-5 is provided through the electromagnetic sub-valve spool 3-3, and the electromagnetic sub-valve exhaust passage 3-5 communicates with both ends of the electromagnetic sub-valve spool 3-3;

[0065] The function of the electromagnetic sub-valve coil 3-4 is to form a magnetic circuit with the electromagnetic sub-valve spool 3-3 after being energized and generate electromagnetic suction force.

[0066] An electromagnetic sub-valve inlet valve seat 3-6 is further installed at one end of the electromagnetic sub-valve seat 3-2 facing away from the electromagnetic sub-valve bottom sealing seat 3-1;

[0067] The electromagnetic sub-valve inlet valve seat 3-6 is provided with a control air groove 3-7 along the circumferential direction, and an air-operated sub-valve spool control cavity 3-8 is provided along the axial direction at one end of the electromagnetic sub-valve inlet valve seat 3-6 facing away from the electromagnetic sub-valve spool 3-3. The position of the control air groove 3-7 corresponds to the position of the control air inlet 5;

[0068] The electromagnetic sub-valve spool 3-3 can respectively form a sealing pair with the electromagnetic sub-valve bottom sealing seat 3-1 or the electromagnetic sub-valve inlet valve seat 3-6;

[0069] An electromagnetic sub-valve inlet passage 3-9 is provided on the electromagnetic sub-valve inlet valve seat 3-6, and the electromagnetic sub-valve inlet passage 3-9 is used to communicate the control air inlet 5 and the air-operated sub-valve 4 so that the control air pushes the air-operated sub-valve 4 to move to control the opening and closing of the control air inlet 5;

[0070] The air-operated sub-valve 4 includes an air-operated sub-valve inlet valve seat 4-1 and an air-operated sub-valve exhaust valve seat 4-2 that are sequentially installed in the sub-valve spool control cavity 2-2, and also includes an air-operated sub-valve spool 4-3 installed in the air-operated sub-valve inlet valve seat 4-1 and the air-operated sub-valve exhaust valve seat 4-2;

[0071] One end of the air-operated sub-valve spool 4-3 extends into the air-operated sub-valve spool control cavity 3-8;

[0072] The air-operated sub-valve spool 4-3 can respectively form a sealing pair with the air-operated sub-valve exhaust valve seat 4-2 or the air-operated sub-valve inlet valve seat 4-1;

[0073] An air outlet 4-4 is provided on the air-operated sub-valve inlet valve seat 4-1, and the position of the air outlet 4-4 corresponds to the position of the control air outlet 6. The air-operated sub-valve spool 4-3 controls the opening and closing of the air outlet 4-4 to control the opening and closing of the control air outlet 6; The sub-valve with a two-stage structure form can use the first-stage electromagnetic sub-valve to drive the opening and closing of the second-stage air-operated sub-valve first, and then use the second-stage sub-valve to drive the opening and closing of the main valve spool, so as to improve the air intake and exhaust flow capacity of the entire sub-valve and improve the opening and closing response speed of the main valve.

[0074] As a preference of this embodiment:

[0075] The intake end valve seat 3-6 of the electromagnetic sub-valve includes a first electromagnetic sub-valve intake end valve seat 3-10 and a second electromagnetic sub-valve intake end valve seat 3-11 connected coaxially. Both the first electromagnetic sub-valve intake end valve seat 3-10 and the second electromagnetic sub-valve intake end valve seat 3-11 are cylindrical, and the diameter of the first electromagnetic sub-valve intake end valve seat 3-10 is smaller than that of the second electromagnetic sub-valve intake end valve seat 3-11.

[0076] The control air groove 3-7 is opened on the second electromagnetic sub-valve intake end valve seat 3-11, and the pneumatic sub-valve spool control cavity 3-8 is axially opened at one end of the second electromagnetic sub-valve intake end valve seat 3-11.

[0077] As a preference of this embodiment:

[0078] The intake end valve seat 4-1 of the pneumatic sub-valve includes a pneumatic sub-valve intake end valve seat body 4-5 and a limiting ring 4-6 installed on the inner wall of the pneumatic sub-valve intake end valve seat body 4-5. The pneumatic sub-valve intake end valve seat body 4-5 is a hollow cylinder, and a pneumatic sub-valve spool accommodating cavity 4-7 is formed inside.

[0079] The air outlet 4-4 is arranged on the pneumatic sub-valve intake end valve seat body 4-5.

[0080] The exhaust end valve seat 4-2 of the pneumatic sub-valve includes a pneumatic sub-valve exhaust end valve seat body 4-8, a pneumatic sub-valve spool channel 4-9 axially opened on the pneumatic sub-valve exhaust end valve seat body 4-8, and an exhaust channel 4-10 opened around the pneumatic sub-valve spool channel 4-9.

[0081] The pneumatic sub-valve spool 4-3 includes a first spool 4-11, a first connection section 4-12, a second spool 4-13, and a second connection section 4-14 connected in sequence.

[0082] The first spool 4-11 is located in the pneumatic sub-valve spool control cavity 3-8, the second spool 4-13 is located in the pneumatic sub-valve spool accommodating cavity 4-7, and the second connection section 4-14 passes through the pneumatic sub-valve spool channel 4-9 and is connected to a reset device 4-15 installed at the other end of the sub-valve spool control cavity 2-2. The reset device 4-15 is used to provide a reset force for the pneumatic sub-valve spool 4-3.

[0083] As a preference of this embodiment:

[0084] The pneumatic sub-valve spool control chamber 3-8 described above includes a first pneumatic sub-valve spool control chamber 3-12 and a second pneumatic sub-valve spool control chamber 3-13 that are connected. The first pneumatic sub-valve spool control chamber 3-12 is a cylinder with one end closed, and the second pneumatic sub-valve spool control chamber 3-13 is a frustum of a cone. The smaller-diameter end of the second pneumatic sub-valve spool control chamber 3-13 is connected to the first pneumatic sub-valve spool control chamber 3-12;

[0085] As a preference of this embodiment:

[0086] The electromagnetic sub-valve air inlet passage 3-9 described above includes a first electromagnetic sub-valve air inlet passage 3-14, a second electromagnetic sub-valve air inlet passage 3-15, and a third electromagnetic sub-valve air inlet passage 3-16;

[0087] The first electromagnetic sub-valve air inlet passage 3-14 is connected to the control air groove 3-7 and the end face of the first electromagnetic sub-valve air inlet end seat 3-10 facing away from the second electromagnetic sub-valve air inlet end seat 3-11;

[0088] The second electromagnetic sub-valve air inlet passage 3-15 is connected to the first pneumatic sub-valve spool control chamber 3-12 and the end face of the first electromagnetic sub-valve air inlet end seat 3-10 facing away from the second electromagnetic sub-valve air inlet end seat 3-11;

[0089] The third electromagnetic sub-valve air inlet passage 3-16 is connected to the control air groove 3-7 and the second pneumatic sub-valve spool control chamber 3-13.

[0090] When the electromagnetic sub-valve coil 3-4 is energized, the electromagnetic sub-valve spool 3-3 moves under the action of the electromagnetic attraction of the electromagnetic sub-valve coil 3-4. After moving, it opens the first electromagnetic sub-valve air inlet passage 3-14 and closes the electromagnetic sub-valve exhaust port 3-17. After the first electromagnetic sub-valve air inlet passage 3-14 is opened, high-pressure gas enters the sub-valve spool control chamber 2-2 from the control air inlet 5, then enters the first pneumatic sub-valve spool control chamber 3-12 through the first electromagnetic sub-valve air inlet passage 3-14 and the second electromagnetic sub-valve air inlet passage 3-15, pushing the pneumatic sub-valve spool 4-3 to move, opening the control air outlet 6, and the high-pressure gas enters the main valve 1 from the control air outlet 6 through the third electromagnetic sub-valve air inlet passage 3-16 and the pneumatic sub-valve air inlet end seat 4-1;

[0091] After the electromagnetic sub-valve coil 3-4 is de-energized, the electromagnetic attraction disappears, the electromagnetic sub-valve spool 3-3 closes the first electromagnetic sub-valve air inlet passage 3-14 and opens the exhaust port 3-17 of the electromagnetic sub-valve. After the exhaust port 3-17 of the electromagnetic sub-valve is opened, the high-pressure gas in the pneumatic sub-valve spool control chamber 3-8 will pass through the second electromagnetic sub-valve air inlet passage 3-15 and the electromagnetic sub-valve exhaust passage 3-5 on the electromagnetic sub-valve spool 3-3 and leak out from the exhaust port 3-17 of the electromagnetic sub-valve;

[0092] As a preference of this embodiment:

[0093] An electromagnetic sub-valve bottom seal seat 3-1 is provided with an electromagnetic sub-valve exhaust port 3-17, and the electromagnetic sub-valve exhaust port 3-17 communicates with a sub-valve core control cavity 2-2 and the external environment;

[0094] The electromagnetic sub-valve bottom seal seat 3-1 is provided with a spring installation groove 3-18 on one side facing the electromagnetic sub-valve core 3-3. An electromagnetic sub-valve spring 3-19 is arranged in the spring installation groove 3-18, and the electromagnetic sub-valve spring 3-19 is connected to the electromagnetic sub-valve core 3-3.

[0095] The electromagnetic sub-valve core 3-3 moves under the action of electromagnetic suction force to overcome the spring force of the electromagnetic sub-valve spring 3-19. After the electromagnetic sub-valve core 3-3 moves, a first electromagnetic sub-valve air inlet passage 3-14 is opened, and the electromagnetic sub-valve exhaust port 3-17 is closed. After the first electromagnetic sub-valve air inlet passage 3-14 is opened, high-pressure gas enters a first pneumatic sub-valve core control cavity 3-12 through a second electromagnetic sub-valve air inlet passage 3-15;

[0096] As a preferred embodiment of this example:

[0097] The reset device 4-15 includes a spring sleeve 4-16 installed at the other end of the sub-valve core control cavity 2-2 and a pneumatic sub-valve spring 4-17 installed in the spring sleeve 4-16. The pneumatic sub-valve spring 4-17 is connected to one end of a second connection section 4-14 passing through a pneumatic sub-valve core passage 4-9 through a spring seat 4-18;

[0098] The spring sleeve 4-16 is of a hollow structure, with one end open and the other end closed. The open end is connected to a pneumatic sub-valve exhaust end valve seat 4-2, and an exhaust port 4-19 is provided on the closed end;

[0099] The pneumatic sub-valve spring 4-17 is connected to the spring sleeve 4-16 through an adjusting gasket 4-20.

[0100] When the device needs to be opened for operation, the pneumatic sub-valve core 4-3 and the pneumatic sub-valve exhaust end valve seat 4-2 form a sealing pair. When the device needs to be closed, the pneumatic sub-valve core 4-3 and the pneumatic sub-valve inlet end valve seat 4-1 form a sealing pair. At this time, the pneumatic sub-valve spring 4-17 provides a sealing force for the pneumatic sub-valve core 4-3. A spring seat 4-18 is installed between the pneumatic sub-valve spring 4-17 and the pneumatic sub-valve core 4-3, and the spring force is transmitted to the pneumatic sub-valve core 4-3 through the spring seat 4-18. The contact surface between the spring seat 4-18 and the pneumatic sub-valve core 4-3 is a ball and socket structure, ensuring that the pneumatic sub-valve core 4-3 does not deflect during movement. The installation force of the pneumatic sub-valve spring 4-17 can be adjusted by selecting different thickness adjusting gaskets 4-20, so that the pneumatic sub-valve 4 can meet the fast response matching under different working pressures.

[0101] The electromagnetic sub-valve intake end valve seat 3-6, the pneumatic sub-valve intake end valve seat 4-1, the pneumatic sub-valve spool 4-3, and the pneumatic sub-valve exhaust end valve seat 4-2 are successively installed in series in the sub-spool control cavity 2-2 and are pressed tightly by the spring sleeve 4-16. The spring sleeve 4-1 is threadedly connected to the sub-spool control cavity 2-2. The adjusting gasket 4-20 and the pneumatic sub-valve spring 4-17 are installed in the spring sleeve 4-1. The rubber O-ring 9 ensures the seal between the pneumatic sub-valve spool 4-3 and the electromagnetic sub-valve intake end valve seat 4-1, and the three rubber O-rings 9 respectively ensure the sealing between the electromagnetic sub-valve intake end valve seat 3-6, the pneumatic sub-valve intake end valve seat 4-1, the pneumatic sub-valve exhaust end valve seat 4-2 and the sub-spool control cavity 2-2.

[0102] Embodiment 2:

[0103] As Figure 3 shown, a control valve for a liquid rocket engine includes a main valve 1 and further includes the fast-response high-pressure large-flow valve 2 described in Embodiment 1; Figure 3 When the fast-response high-pressure large-flow valve 2 is installed on the main valve 1, the axes of the fast-response high-pressure large-flow valve 2 and the main valve 1 are parallel, and the sub-valve air inlet 1-7 on the main valve 1 is communicated with the control air outlet 6 on the fast-response high-pressure large-flow valve 2;

[0104] The described fast-response high-pressure large-flow valve 2 is communicated with the main valve 1;

[0105] It includes a main valve 1 and a sub-valve 2 communicated with the main valve 1. The main valve 1 includes a main valve body 1-1. A main spool control cavity 1-2 is provided in the main valve body 1-1. A main valve seat 1-3 is installed in the main spool control cavity 1-2, and a main spool 1-4 is sleeved in the main valve seat 1-3;

[0106] A main valve inlet 1-5 and a main valve outlet 1-6 are further provided at the bottom end of the main valve body 1-1. The main spool 1-4 controls the opening and closing of the main valve outlet 1-6, and a sub-valve air inlet 1-7 is provided at the top end of the main valve body 1-1;

[0107] The sub-valve 2 includes a sub-valve body 2-1 and a sub-spool control cavity 2-2 provided in the sub-valve body 2-1. An electromagnetic sub-valve 3 and a pneumatic sub-valve 4 are installed in the sub-spool control cavity 2-2;

[0108] A control air inlet 5 and a control air outlet 6 are further provided on the sub-valve body 2-1. The control air inlet 5 and the control air outlet 6 are respectively communicated with the sub-spool control cavity 2-2. The control air outlet 6 is communicated with the main spool control cavity 1-2 through the sub-valve air inlet 1-7;

[0109] The electromagnetic sub-valve 3 is used to drive the opening and closing of the pneumatic sub-valve 4 to control the opening and closing of the main valve 1.

[0110] The main valve 1 adopts a forward unloading structure, and the unloading area is slightly larger than the valve port sealing area to improve the closing response speed of the main valve core 1-4. At the same time, it ensures that the medium force on the main valve core in the closed state is beneficial to the closing of the main valve core 1-4, and ensures the sealing reliability of the main valve core under pressure fluctuations. The reset of the main valve core 1-4 adopts a double-spring structure of the inner main spring 7 and the outer main spring 8 to increase the reset force of the main valve core 1-4 within a limited space and improve the closing response speed.

[0111] The main valve core 1-4 and the main valve seat 1-3 form a sealing pair to ensure the sealing of the propellant when the control valve is closed. The inner main spring 7 and the outer main spring 8 are installed between the main valve core 1-4 and the main valve seat 1-3 to provide a closing force for the main valve core 1-4.

[0112] The rubber O-ring 9 ensures the sealing between the main valve seat 1-3 and the main valve body 1, between the main valve core 1-4 and the main valve seat 1-3, and between the main valve core 1-4 and the main valve body 1-1.

[0113] The fast-response high-pressure large-flow valve 2 is installed on the main valve body 1-1 and ensures sealing through the rubber O-ring 9.

[0114] The specific working process of the present invention:

[0115] The electromagnetic sub-valve 3 is energized, and the control valve is in the open state:

[0116] When the engine needs the control valve to open and work, the control system energizes the electromagnetic sub-valve coil 3-4 (24~31) VDC. After the electromagnetic sub-valve coil 3-4 is energized, a magnetic circuit is formed with the electromagnetic sub-valve core 3-3, and an electromagnetic suction force is generated. The electromagnetic sub-valve core 3-3 moves under the action of the electromagnetic suction force to overcome the spring force of the electromagnetic sub-valve spring 3-19. After the electromagnetic sub-valve core 3-3 moves, the first electromagnetic sub-valve air inlet 3-14 is opened, and the exhaust port 3-17 of the electromagnetic sub-valve is closed. After the first electromagnetic sub-valve air inlet 3-14 is opened, the high-pressure gas enters the pneumatic sub-valve core control cavity 3-8 through the second electromagnetic sub-valve air inlet 3-15. The pneumatic sub-valve core 4-3 is pushed by the high-pressure gas to leave the pneumatic sub-valve air inlet end valve seat 4-1, and at the same time, the pneumatic sub-valve exhaust end valve seat 4-2 is closed. At this time, the air inlet channel of the pneumatic sub-valve 4 is opened, and the exhaust channel is closed. The high-pressure gas enters the main valve core control cavity 1-2 from the control air outlet 6 through the third electromagnetic sub-valve air inlet 3-16 and the pneumatic sub-valve air inlet end valve seat 4-1, and drives the main valve core 1-4 to overcome the acting forces of the inner main spring 7 and the outer main spring 8 to open and maintain the open state. After the main valve core 1-4 of the control valve is opened, the main valve inlet 1-5 and the main valve outlet 1-6 are connected, and the propellant enters the engine from the main valve outlet 1-6.

[0117] The electromagnetic sub-valve 3 is de-energized, and the control valve is in the closed state:

[0118] When the engine needs to control the valve to close and cut off the propellant supply, the control system cuts off the power supply to the solenoid pilot valve coil 3-4. The electromagnetic suction force disappears, and the solenoid pilot valve spool 3-3 moves under the spring force of the solenoid pilot valve spring 3-19. The solenoid pilot valve spool 3-3 closes the first solenoid pilot valve air inlet 3-14 and opens the exhaust port 3-17 of the solenoid pilot valve. After the exhaust port 3-17 of the solenoid pilot valve is opened, the high-pressure gas in the pneumatic pilot valve spool control chamber 3-8 will pass through the second solenoid pilot valve air inlet 3-15 and the solenoid pilot valve exhaust passage 3-5 on the solenoid pilot valve spool 3-3 and leak out from the exhaust port 3-17 of the solenoid pilot valve. Then, the pneumatic pilot valve spool 4-3 moves away from the pneumatic pilot valve exhaust end valve seat 4-2 under the spring force of the pneumatic pilot valve spring 4-17 and closes the pneumatic pilot valve inlet end valve seat 4-1, thus cutting off the high-pressure gas from entering the main spool control chamber 1-2. The original high-pressure gas in the main spool control chamber 1-2 passes through the control gas outlet 6 of the pilot valve, through the exhaust passage 4-10 on the pneumatic pilot valve exhaust end valve seat 4-2, and finally leaks out from the exhaust port 4-19 of the spring sleeve 4-16. After the pressure in the main spool control chamber 1-2 is released, the main spool 1-4 closes under the combined action of the inner main spring 7, the outer main spring 8 and the propellant medium force, cuts off the propellant supply, and forms a sealing pair with the main valve seat 1-3 to ensure that the propellant is sealed upstream of the main valve seat 1-3.

[0119] The above is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present invention without creative work are covered by the protection scope of the present invention.

Claims

1. A fast-response high-pressure large-flow valve (2), comprising a secondary valve body (2-1) and a secondary spool control cavity (2-2) opened in the secondary valve body (2-1). A control air inlet (5) and a control air outlet (6) are further opened on the secondary valve body (2-1), and the control air inlet (5) and the control air outlet (6) are respectively communicated with the secondary spool control cavity (2-2), characterized in that, The fast response high pressure large flow valve (2) further comprises an electromagnetic auxiliary valve (3) and a pneumatic auxiliary valve (4) coaxially mounted in the auxiliary valve core control chamber (2-2), wherein the electromagnetic auxiliary valve (3) is used to drive the opening and closing of the pneumatic auxiliary valve (4) to control the opening and closing of the control gas outlet (6); The electromagnetic auxiliary valve (3) comprises an electromagnetic auxiliary valve bottom sealing seat (3-1) installed at one end of the auxiliary valve core control chamber (2-2) and an electromagnetic auxiliary valve seat (3-2) installed on the electromagnetic auxiliary valve bottom sealing seat (3-1); An electromagnetic auxiliary valve core (3-3) is installed in the electromagnetic auxiliary valve seat (3-2), and an electromagnetic auxiliary valve coil (3-4) is installed between the electromagnetic auxiliary valve bottom sealing seat (3-1), the electromagnetic auxiliary valve seat (3-2) and the auxiliary valve body (2-1). The electromagnetic auxiliary valve coil (3-4) is used to control the electromagnetic auxiliary valve core (3-3) to move in the electromagnetic auxiliary valve seat (3-2); The solenoid auxiliary valve core (3-3) is provided with an solenoid auxiliary valve exhaust passage (3-5) extending therethrough, and the solenoid auxiliary valve exhaust passage (3-5) is connected to both ends of the solenoid auxiliary valve core (3-3); An electromagnetic auxiliary valve inlet end valve seat (3-6) is also installed on one end of the electromagnetic auxiliary valve seat (3-2) facing away from the electromagnetic auxiliary valve bottom sealing seat (3-1); The solenoid auxiliary valve inlet end valve seat (3-6) is provided with a control air groove (3-7) along the circumferential direction, and the solenoid auxiliary valve inlet end valve seat (3-6) is provided with a pneumatic auxiliary valve core control cavity (3-8) along the axial direction at one end of the solenoid auxiliary valve core (3-3) facing away from the solenoid auxiliary valve core, and the position of the control air groove (3-7) corresponds to the position of the control air inlet (5); The solenoid auxiliary valve core (3-3) can form a sealing pair with the solenoid auxiliary valve bottom sealing seat (3-1) or the solenoid auxiliary valve intake end valve seat (3-6) respectively; An electromagnetic auxiliary valve air inlet passage (3-9) is provided on the valve seat (3-6) at the air inlet end of the electromagnetic auxiliary valve. The electromagnetic auxiliary valve air inlet passage (3-9) is used to connect the control air inlet (5) and the pneumatic auxiliary valve (4) so that the control air pushes the pneumatic auxiliary valve (4) to move, thereby controlling the opening and closing of the control air inlet (5). The pneumatic auxiliary valve (4) comprises a pneumatic auxiliary valve inlet end valve seat (4-1) and a pneumatic auxiliary valve exhaust end valve seat (4-2) which are sequentially mounted in the auxiliary valve core control chamber (2-2), and also comprises a pneumatic auxiliary valve core (4-3) which is mounted in the pneumatic auxiliary valve inlet end valve seat (4-1) and the pneumatic auxiliary valve exhaust end valve seat (4-2); One end of the pneumatic auxiliary valve core (4-3) extends into the pneumatic auxiliary valve core control chamber (3-8); The pneumatic auxiliary valve core (4-3) can form a sealing pair with the valve seat (4-2) at the exhaust end of the pneumatic auxiliary valve or the valve seat (4-1) at the intake end of the pneumatic auxiliary valve; An air outlet (4-4) is provided on the valve seat (4-1) at the air inlet end of the pneumatic auxiliary valve, the position of the air outlet (4-4) corresponds to the position of the control air outlet (6), and the valve core (4-3) of the pneumatic auxiliary valve controls the opening and closing of the air outlet (4-4) to control the opening and closing of the control air outlet (6).

2. The fast-response high-pressure large-flow valve (2) according to claim 1, characterized in that, The intake end valve seat (3-6) of the electromagnetic sub-valve includes a first electromagnetic sub-valve intake end valve seat (3-10) and a second electromagnetic sub-valve intake end valve seat (3-11) connected coaxially. Both the first electromagnetic sub-valve intake end valve seat (3-10) and the second electromagnetic sub-valve intake end valve seat (3-11) are cylindrical, and the diameter of the first electromagnetic sub-valve intake end valve seat (3-10) is smaller than that of the second electromagnetic sub-valve intake end valve seat (3-11). The control air groove (3-7) is opened on the second electromagnetic sub-valve intake end valve seat (3-11), and the pneumatic sub-valve spool control cavity (3-8) is axially opened at one end of the second electromagnetic sub-valve intake end valve seat (3-11).

3. The fast-response high-pressure large-flow valve (2) according to claim 1, characterized in that, The pneumatic sub-valve intake end valve seat (4-1) includes a pneumatic sub-valve intake end valve seat body (4-5) and a limiting ring (4-6) installed on the inner wall of the pneumatic sub-valve intake end valve seat body (4-5). The pneumatic sub-valve intake end valve seat body (4-5) is a hollow cylinder, and a pneumatic sub-valve spool accommodating cavity (4-7) is formed inside. The air outlet (4-4) is arranged on the pneumatic sub-valve intake end valve seat body (4-5). The pneumatic sub-valve exhaust end valve seat (4-2) includes a pneumatic sub-valve exhaust end valve seat body (4-8), a pneumatic sub-valve spool channel (4-9) axially opened on the pneumatic sub-valve exhaust end valve seat body (4-8), and an exhaust channel (4-10) opened around the pneumatic sub-valve spool channel (4-9). The pneumatic sub-valve spool (4-3) includes a first spool (4-11), a first connecting section (4-12), a second spool (4-13), and a second connecting section (4-14) connected in sequence. The first spool (4-11) is located in the pneumatic sub-valve spool control cavity (3-8), the second spool (4-13) is located in the pneumatic sub-valve spool accommodating cavity (4-7), and the second connecting section (4-14) passes through the pneumatic sub-valve spool channel (4-9) and is connected to a reset device (4-15) installed at the other end of the sub-spool control cavity (2-2). The reset device (4-15) is used to provide a reset force for the pneumatic sub-valve spool (4-3).

4. A fast-response high-pressure large-flow valve according to claim 1, characterized in that, The pneumatic sub-valve spool control cavity (3-8) includes a first pneumatic sub-valve spool control cavity (3-12) and a second pneumatic sub-valve spool control cavity (3-13) that are communicated. The first pneumatic sub-valve spool control cavity (3-12) is a cylinder with one end closed, and the second pneumatic sub-valve spool control cavity (3-13) is a frustum of a cone. The end with a smaller diameter of the second pneumatic sub-valve spool control cavity (3-13) is communicated with the first pneumatic sub-valve spool control cavity (3-12).

5. A fast-response high-pressure large-flow valve according to claim 1, characterized in that, The electromagnetic sub-valve intake passage (3-9) includes a first electromagnetic sub-valve intake passage (3-14), a second electromagnetic sub-valve intake passage (3-15), and a third electromagnetic sub-valve intake passage (3-16). The first electromagnetic sub-valve intake passage (3-14) communicates the control air groove (3-7) with the end face of the first electromagnetic sub-valve intake end valve seat (3-10) facing away from the second electromagnetic sub-valve intake end valve seat (3-11). The second electromagnetic sub-valve air inlet passage (3-15) communicates with the first pneumatic sub-valve spool control chamber (3-12) and the end face of the first electromagnetic sub-valve air inlet end valve seat (3-10) facing away from the second electromagnetic sub-valve air inlet end valve seat (3-11). The third electromagnetic sub-valve air inlet passage (3-16) communicates with the control air groove (3-7) and the second pneumatic sub-valve spool control chamber (3-13).

6. The fast-response high-pressure large-flow valve according to claim 1, wherein An electromagnetic sub-valve bottom sealing seat (3-1) is provided with an electromagnetic sub-valve exhaust port (3-17), and the electromagnetic sub-valve exhaust port (3-17) communicates with the sub-spool control chamber (2-2) and the external environment; The electromagnetic sub-valve bottom sealing seat (3-1) is provided with a spring installation groove (3-18) on the side facing the electromagnetic sub-valve spool (3-3). An electromagnetic sub-valve spring (3-19) is arranged in the spring installation groove (3-18), and the electromagnetic sub-valve spring (3-19) is connected to the electromagnetic sub-valve spool (3-3).

7. The fast-response high-pressure large-flow valve according to claim 3, characterized in that, The reset device (4-15) includes a spring sleeve (4-16) installed at the other end of the sub-spool control chamber (2-2) and a pneumatic sub-valve spring (4-17) installed in the spring sleeve (4-16). The pneumatic sub-valve spring (4-17) is connected to one end of the second connection section (4-14) passing through the pneumatic sub-valve spool passage (4-9) through a spring seat (4-18); The spring sleeve (4-16) is of a hollow structure, with one end open and the other end closed. The open end is connected to the pneumatic sub-valve exhaust end valve seat (4-2), and an exhaust port (4-19) is provided on the closed end; The pneumatic sub-valve spring (4-17) is connected to the spring sleeve (4-16) through an adjusting gasket (4-20).

8. A control valve for a liquid rocket engine, comprising a main valve (1), characterized in that, It further includes a fast-response high-pressure large-flow valve (2) as described in any one of claims 1-7; The fast-response high-pressure large-flow valve (2) communicates with the main valve (1); The main valve (1) includes a main valve body (1-1). A main spool control chamber (1-2) is provided in the main valve body (1-1). A main valve seat (1-3) is installed in the main spool control chamber (1-2), and a main spool (1-4) is sleeved in the main valve seat (1-3); The bottom end of the main valve body (1-1) is further provided with a main valve inlet (1-5) and a main valve outlet (1-6). The main spool (1-4) controls the opening and closing of the main valve outlet (1-6), and a sub-valve air inlet (1-7) is provided at the top end of the main valve body (1-1); The control air outlet (6) communicates with the main spool control chamber (1-2) through the sub-valve air inlet (1-7).

Images