Flow valve, liquid rocket feeding system, liquid rocket

Abstract

The present invention relates to the technical field of hydraulic valves, and particularly relates to a flow valve, a liquid rocket feeding system, and a liquid rocket. A flow valve includes a throttling chamber and a pressure stabilizing chamber. The fluid flowing in through the inlet port realizes throttling under the action of a first throttling port on the throttling chamber. The fluid pressure before and after the first throttling port changes. In order to ensure the stability of the pressure difference before and after the first throttling port, a pressure stabilizing chamber is provided in the present invention. When the pressure difference before and after the first throttling port changes, the elastic member in the pressure stabilizing chamber senses the pressure change and drives the second adjusting member to move. The moving second adjusting member controls the opening degree of the second throttling port. The second throttling port is communicated with the outlet port. Adjusting the opening degree of the second throttling port can adjust the pressure in the chamber behind the first throttling port, thereby ensuring the stability of the pressure difference before and after the first throttling port. Under the condition of stable pressure difference, the stability of the liquid flow rate flowing through the flow valve can be ensured, thereby ensuring the stability of fluid supply.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic valves, and particularly relates to a flow valve, a liquid rocket feeding system, and a liquid rocket. Background Art

[0002] With the intensification of commercial space competition, the requirements for the reliability and economy of launch vehicle engines are also getting higher and higher. To reduce the cost of a single launch and enhance commercial competitiveness, rockets need to be reusable. During the rocket recovery process, the thrust of the engine must be precisely adjusted to ensure that the launch vehicle lands smoothly, thereby achieving reuse.

[0003] The thrust adjustment function of a reusable cryogenic liquid oxygen methane engine is achieved by a regulating valve provided in the medium pipeline. The regulating valve is the core component for realizing the thrust adjustment of the rocket engine. The regulating valve changes the throttling area of the throttling element, adjusts the flow rate and pressure of the flowing medium, and ensures that the flow rate and mixing ratio of the medium entering the downstream system meet the requirements of the engine thrust adjustment.

[0004] However, during the engine thrust adjustment process, the pressure difference between the inlet and outlet of the regulating valve is a transient variable. The change in the pressure difference will cause a change in the flow rate, which in turn affects the stability of the flow supply. The fluctuation of the flow supply is not conducive to the precise control of the engine thrust and mixing ratio, easily causes unstable engine thrust control, and may even cause system oscillation and instability in severe cases. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor flow supply stability of the flow valve in the existing liquid rocket, and thus provide a flow valve, a liquid rocket feeding system, and a liquid rocket.

[0006] To solve the above problems, the present invention provides a flow valve, comprising: a valve body, with an inlet and an outlet respectively provided at both ends; a valve sleeve, disposed in the valve body, and communicating with the inlet and the outlet at both ends respectively; along the direction of fluid flow, the valve sleeve is divided into a throttling chamber and a pressure stabilizing chamber. A first throttling port is provided on the peripheral wall of the throttling chamber, and a second throttling port is provided on the peripheral wall of the pressure stabilizing chamber. A flow channel is formed between the outer peripheral surface of the valve sleeve and the inner peripheral surface of the valve body, and the first throttling port and the second throttling port are communicated through the flow channel; a throttling driving assembly, including a first adjusting member disposed on the outer peripheral wall of the throttling chamber, and the first adjusting member reciprocates along the outer peripheral wall of the throttling chamber to control the opening degree of the first throttling port; a pressure stabilizing driving assembly, including a second adjusting member disposed in the pressure stabilizing chamber and an elastic member supporting the second adjusting member, and the pressure difference before and after the first throttling port drives the second adjusting member to move to control the opening degree of the second throttling port.

[0007] The flow valve in the present invention further includes: a first sealing end cover and a second sealing end cover respectively disposed on the inlet port and the outlet port.

[0008] Further, the valve sleeve is configured as a cylindrical structure with openings at both ends. Flanges are integrally formed on the end faces of the first sealing end cover and the second sealing end cover facing the valve sleeve, and both ends of the valve sleeve are respectively sleeved on the flanges.

[0009] Further, the second adjusting member is configured as a cylindrical structure with an opening at one end and is embedded in the voltage stabilizing chamber. The opening end thereof is movably sleeved on the flange of the second sealing end cover; the elastic member is disposed inside the second adjusting member, and both ends thereof respectively abut against the second adjusting member and the flange of the second sealing end cover.

[0010] Further, a partition plate is disposed inside the valve sleeve, a through hole is provided on the partition plate, and a throttle nozzle is disposed in the through hole.

[0011] Further, at least one first flow hole is provided on the peripheral wall of the valve sleeve, a second flow hole is correspondingly provided on the peripheral wall of the second adjusting member, and the first flow hole is located between the first throttle port and the second throttle port.

[0012] Further, a flow equalizing groove is provided along the circumferential direction on the peripheral wall of the second adjusting member, and the second flow hole is provided at the bottom of the flow equalizing groove.

[0013] Further, the flange of the second sealing end cover is of a hollow structure, and a third throttle port is provided on its peripheral wall, and the third throttle port is correspondingly provided with the second throttle port.

[0014] Further, the peripheral wall at the third throttle port is configured as an arc curved inwardly towards the second adjusting member.

[0015] Further, the first adjusting member is a sliding sleeve sleeved on the throttle chamber.

[0016] Further, the throttle driving assembly further includes a gear shaft disposed on the valve body, a rack is provided on the first adjusting member, and the rack meshes with the gear segment on the gear shaft.

[0017] Further, on one side of the gear shaft close to its driving end, a first sealing ring and a second sealing ring are respectively provided along its axial direction.

[0018] Further, at the middle position between the first sealing ring and the second sealing ring, a drain passage communicating with the outside is provided on the valve body.

[0019] The present invention also provides a liquid rocket feeding system, including the flow valve as described in any one of the above.

[0020] The present invention also provides a liquid rocket, comprising: the flow valve described in any one of the above; or the liquid rocket feeding system described in the above.

[0021] The technical solution of the present invention has the following advantages:

[0022] 1. A throttling chamber and a pressure stabilizing chamber are arranged in the flow valve of the present invention. The fluid flowing in through the inlet port realizes the throttling effect under the action of the first throttling port on the throttling chamber. The fluid pressure before and after the first throttling port changes. In order to ensure the stability of the pressure difference before and after the first throttling port, a pressure stabilizing chamber is provided in the present invention. When the pressure difference before and after the first throttling port changes, the elastic member in the pressure stabilizing chamber senses the above change and drives the second adjusting member to move. The moving second adjusting member controls the opening degree of the second throttling port. The second throttling port is communicated with the outlet port. Adjusting the opening degree of the second throttling port can adjust the pressure in the chamber behind the first throttling port, so as to ensure the stability of the pressure difference before and after the first throttling port. Under the condition of stable pressure difference, the stability of the liquid flow rate flowing through the flow valve can be ensured, thereby ensuring the stability of fluid supply.

[0023] 2. In the flow valve of the present invention, a first sealing end cover and a second sealing end cover are respectively arranged at the inlet port and the outlet port. When the fluid flows through the inlet port and the outlet port, in order to prevent it from flowing into the outside from the connection gap between the parts, the first sealing end cover and the second sealing end cover are provided in the present invention to increase the sealing performance at the positions of the inlet port and the outlet port, prevent the occurrence of liquid leakage problems, and ensure airtightness, providing a basis for realizing the stability of the air pressure in the flow valve.

[0024] 3. In the flow valve of the present invention, the valve sleeve is configured as a cylindrical structure with openings at both ends. Flanges are integrally formed on the end faces of the first sealing end cover and the second sealing end cover facing the valve sleeve. Both ends of the valve sleeve are respectively sleeved on the flanges. The setting of the flanges can make the installation stability of the first sealing cover and the second sealing cover better, thus ensuring good airtightness.

[0025] 4. In the flow valve of the present invention, flow equalizing grooves are arranged on the circumferential wall of the second adjusting member along its circumferential direction, and the second flow through hole is arranged at the bottom of the flow equalizing groove. The flow equalizing grooves ensure that the liquid flowing out of the first flow through hole can always quickly flow into the second flow through hole, and will not cause the problem that some of the first flow through holes and the second flow through holes cannot communicate due to the misalignment of the first flow through hole and the second flow through hole caused by the movement of the second adjusting member.

[0026] 5. In the flow valve of the present invention, the peripheral wall at the third throttle port is configured as an arc curved inwardly towards the second adjusting member. The peripheral wall of the third throttle port is configured as an arc structure. During the adjustment process of the second adjusting member, the adjusted area of the third throttle port undergoes a non-linear change, ensuring a diverse adjustment according to the real-time requirements of flow rate adjustment.

[0027] 6. On one side of the gear shaft in the flow valve of the present invention, close to its driving end, a first sealing ring and a second sealing ring are respectively arranged along its axial direction. The arrangement of the first sealing ring and the second sealing ring ensures the tightness of the driving end and prevents liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is an axial sectional view of the flow valve in Embodiment 1 provided by the present invention;

[0030] Figure 2 It is a radial sectional view of the flow valve in Embodiment 1 provided by the present invention.

[0031] Description of the reference numerals in the drawings:

[0032] 1 - valve body; 11 - inlet port; 12 - outlet port; 13 - drain passage;

[0033] 2 - valve sleeve; 21 - throttle chamber; 22 - pressure stabilizing chamber; 23 - first throttle port; 24 - second throttle port; 25 - flow channel; 26 - partition plate; 27 - first flow hole;

[0034] 3 - throttle driving assembly; 31 - first adjusting member; 32 - gear shaft; 33 - rack; 34 - first sealing ring; 35 - second sealing ring;

[0035] 4 - pressure stabilizing driving assembly; 41 - second adjusting member; 42 - elastic member; 43 - second flow hole; 44 - flow equalizing groove;

[0036] 5 - first sealing end cover;

[0037] 6 - second sealing end cover; 61 - third throttle port;

[0038] 7 - throttle nozzle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Embodiment 1

[0044] As From Figure 1 to Figure 2 shown, a flow valve provided in this embodiment is used specifically on a liquid rocket to adjust the reaction amount of liquid oxygen and methane in a liquid rocket engine, thereby realizing the adjustment of the engine thrust.

[0045] As Figure 1 shown in, the flow valve includes a valve body 1. The valve body 1 is a hollow structure, and the accommodation space formed inside it is cylindrical. An inlet port 11 and an outlet port 12 are respectively arranged at both ends of the internal space. The external medium, such as liquid oxygen or methane, flows into the flow valve in this embodiment through the inlet port 11. For the cooperation with the outside, relevant joint structures can be designed at the inlet port 11 and the outlet port 12 to achieve the convenience of connection.

[0046] The valve body 1 is internally embedded with a valve sleeve 2, which is also a hollow structure, specifically a thin-walled cylindrical structure. Its two ends are respectively connected to the inlet port 11 and the outlet port 12. There is an installation gap between the outer surface of the valve sleeve 2 and the inner surface of the valve body 1. The above installation gap is an annular gap, which constitutes the flow channel 25. Along the direction of fluid flow, the valve sleeve 2 is divided into a throttling chamber 21 and a pressure stabilizing chamber 22, and the throttling chamber 21 and the pressure stabilizing chamber 22 are separated by a partition plate 26.

[0047] In order to adjust the flow rate, a first throttling port 23 is provided on the peripheral wall of the throttling chamber 21. In order to stabilize the pressure difference inside the flow rate valve, a second throttling port 24 is provided on the peripheral wall of the pressure stabilizing chamber 22. The first throttling port 23 and the second throttling port 24 are connected through the flow channel 25. The first throttling port 23 in this embodiment is a long strip hole directly machined along the axial direction of the throttling chamber 21, and the second throttling port 24 is a fan-shaped hole machined along the circumferential direction of the pressure stabilizing chamber 22. In some other embodiments, the shapes of the above first throttling port 23 and second throttling port 24 can be designed according to the requirements of flow rate adjustment, such as triangular holes, square holes and other special-shaped holes.

[0048] This embodiment also includes a throttling drive assembly 3. The throttling drive assembly 3 includes a first adjusting member 31 provided on the outer peripheral wall of the throttling chamber 21. The first adjusting member 31 reciprocates along the outer peripheral wall of the throttling chamber 21 to control the opening degree of the first throttling port 23. And a pressure stabilizing drive assembly 4. The pressure stabilizing drive assembly 4 includes a second adjusting member 41 provided in the pressure stabilizing chamber 22 and an elastic member 42 supporting the second adjusting member 41. The pressure difference before and after the first throttling port 23 drives the second adjusting member 41 to move to control the opening degree of the second throttling port 24.

[0049] In the flow rate valve of this embodiment, by setting the throttling chamber 21 and the pressure stabilizing chamber 22, the fluid flowing in through the inlet port 11 realizes the throttling effect under the action of the first throttling port 23 on the throttling chamber 21, and the fluid pressure before and after the first throttling port 23 changes. In order to ensure the stability of the pressure difference before and after the first throttling port 23, a pressure stabilizing chamber 22 is provided in this embodiment. When the pressure difference before and after the first throttling port 23 changes, the elastic member in the pressure stabilizing chamber 22 senses the above change and drives the second adjusting member 41 to move. The moving second adjusting member 41 controls the opening degree of the second throttling port 24. The second throttling port 24 is connected to the outlet port 12. Adjusting the opening degree of the second throttling port 24 can adjust the pressure in the chamber behind the first throttling port 23, so as to ensure the stability of the pressure difference before and after the first throttling port 23. Under the condition of stable pressure difference, the stability of the liquid flow rate flowing through the flow rate valve can be ensured, so as to ensure the stability of fluid supply.

[0050] To ensure the sealing performance at the inlet 11 and the outlet 12, prevent liquid leakage and ensure airtightness, in this embodiment, a first sealing end cover 5 and a second sealing end cover 6 are provided on the inlet 11 and the outlet 12. The first sealing end cover 5 and the second sealing end cover 6 in this embodiment are both flange structures. One end face of each is fitted on the axial end face at the inlet 11 or the outlet 12, and a flange is formed protruding on the end face facing the valve sleeve 2. The two ends of the valve sleeve 2 are respectively sleeved on the flange. Therefore, the first sealing end cover 5 is crimped between the inlet 11 and the valve sleeve 2, and the second sealing end cover 6 is crimped between the outlet 12 and the other end of the valve sleeve 2.

[0051] To further ensure airtightness, sealant is applied at the joints where the first sealing end cover 5 and the second sealing end cover 6 are respectively in contact with the inlet 11 and the outlet 12.

[0052] To further ensure airtightness, an interference fit is adopted between the valve sleeve 2 and the flange.

[0053] The flange structure on the second sealing end cover 6 in this embodiment includes a first flange portion disposed close to one end face of the second sealing end cover 6, and the outer peripheral surface of the first flange portion is fitted and installed with the inner surface of the valve sleeve 2. It also includes a second flange portion coaxially arranged with the first flange portion. A cover is provided at one end of the second flange away from the outlet 12, and the diameter of the second flange portion is smaller than that of the first flange portion, so that when the second flange portion extends deep into the valve sleeve 2, there is a gap between it and the inner surface of the valve sleeve 2.

[0054] To achieve the connection between the second throttle port 24 and the outlet 12, a third throttle port 61 is also provided at a position on the second flange of the second sealing end cover 6 in this embodiment close to the second outlet 12, and the third throttle port 61 is correspondingly arranged with the second throttle port 24.

[0055] Further, the peripheral wall at the third throttle port 61 is configured as an arc bent inward towards the second adjusting member 41. The peripheral wall of the third throttle port 61 is configured as an arc structure. During the adjustment of the second adjusting member 41, the adjusted area of the third throttle port 61 changes non-linearly, ensuring diverse adjustment according to the real-time requirements of flow rate adjustment.

[0056] The second adjusting member 41 in this embodiment is configured as a tubular structure with one end open, embedded in the pressure stabilizing chamber 22, and its open end is movably sleeved on the second flange of the second sealing end cover 6. The wall thickness of the second adjusting member 41 is adapted to the gap between the second flange and the valve sleeve 2 to enable its free movement in the above gap. Specifically, under the action of the pressure generated by the pressure difference, the peripheral wall at the open end position of the second adjusting member 41 gradually extends and moves into the gap between the second throttle port 24 and the third throttle port 61, thereby realizing the adjustment of the inflow area at the third throttle port 61.

[0057] In this embodiment, the elastic member 42 is disposed inside the second adjusting member 41, and its two ends respectively abut against the flange of the second adjusting member 41 and the second sealing end cover 6. Specifically, the elastic member 42 is a compression spring structure, one end of which abuts against the inner surface of the second adjusting member 41, and one end abuts against the cover of the second flange.

[0058] In order to apply the pressure in the throttling chamber 21 to the second adjusting member 41, a through hole is provided on the partition plate 26 in this embodiment.

[0059] In order to avoid excessive pressure difference on both sides of the through hole, resulting in too fast movement of the second adjusting member 41 and generating vibration, and too fast vibration is likely to cause inaccurate adjustment position, which in turn leads to inaccurate pressure adjustment, a throttle nozzle 7 is provided in the through hole in this embodiment.

[0060] In order to ensure that the pressure after the first throttling port 23 acts on the second adjusting member 41, at least one first flow hole 27 is provided on the peripheral wall of the valve sleeve 2 in this embodiment. The first flow hole 27 corresponds to the second adjusting member 41 in position, and a second flow hole 43 is correspondingly provided on the peripheral wall of the second adjusting member 41, and the first flow hole 27 is located between the first throttling port 23 and the second throttling port 24. The first flow hole 27 and the second flow hole 43 in this embodiment are both circular holes, and the number of them is multiple, which are equally spaced along the circumferential direction of the above-mentioned peripheral wall. Of course, in some other embodiments, the shapes of the first flow hole 27 and the second flow hole 43 in the above-mentioned may also be square, etc., and the number of them may also be one, two, etc.

[0061] Furthermore, a flow equalizing groove 44 is provided on the peripheral wall of the second adjusting member 41 along its circumferential direction, and the second flow hole 43 is provided at the bottom of the flow equalizing groove 44. The flow equalizing groove 44 ensures that the liquid flowing out of the first flow hole 27 can always flow into the second flow hole 43 quickly, and will not cause the problem that part of the first flow hole 27 and the second flow hole 43 cannot communicate due to the misalignment of the first flow hole 27 and the second flow hole 43 caused by the movement of the second adjusting member 41.

[0062] The first adjusting member 31 in this embodiment is a sliding sleeve sleeved on the throttling chamber 21. The sliding sleeve is driven by the throttling driving assembly 3 to move axially along the throttling chamber 21 to adjust the throttling area at the first throttling port 23.

[0063] The throttle drive assembly 3 in this embodiment further includes a gear shaft 32 provided on the valve body 1. A separate chamber is protruded from the surface of the valve body 1 to accommodate the throttle drive assembly 3 described above, and the gear shaft 32 is arranged in the chamber described above. The above-mentioned chamber communicates with the throttle chamber 21. A rack 33 is directly machined on the outer peripheral surface of the first adjusting member 31. The rack 33 meshes with the gear segment on the gear shaft 32, and the gear end above the gear shaft 32 acts on the rack 33 through the connection with the throttle chamber 21. In some other embodiments, the above-mentioned rack 33 can also be detachably installed on the outer peripheral surface of the first adjusting member 31.

[0064] In order to further ensure the sealing performance of the clearance position at the throttle drive assembly 3, on one side of the gear shaft 32 close to its drive end, a first sealing ring 34 and a second sealing ring 35 are respectively arranged along its axial direction to prevent the leakage of fluid.

[0065] Further, when part of the fluid flows into the middle of the first sealing ring 34 and the second sealing ring 35, at the middle position of the first sealing ring 34 and the second sealing ring 35, a drain channel 13 communicating with the outside is provided on the valve body 1 to drain the fluid flowing into the middle of the first sealing ring 34 and the second sealing ring 35 to the outside.

[0066] Embodiment 2

[0067] A liquid rocket feeding system is provided in this embodiment, including the flow valve described above, which has all the technical advantages of the flow valve in Embodiment 1 above, and will not be elaborated here one by one.

[0068] The liquid rocket feeding system includes a fuel supply pipeline and a catalyst supply pipeline. The flow valve is installed on the above-mentioned pipeline to control the flow rates supplied by the fuel supply pipeline and the catalyst supply pipeline to the combustion chamber of the engine, so as to ensure the stability of the thrust generated by the engine.

[0069] Embodiment 3

[0070] A liquid rocket is provided in this embodiment, including the liquid rocket feeding system in Embodiment 2 above, and having all its technical advantages, and will not be elaborated here one by one.

[0071] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A flow valve, characterized in that, Comprising: A valve body (1) with an inlet port (11) and an outlet port (12) provided at both ends respectively; A valve sleeve (2) disposed within the valve body (1), with both ends communicating with the inlet port (11) and the outlet port (12) respectively; Along the direction of fluid flow, the valve sleeve (2) is divided into a throttling chamber (21) and a pressure stabilizing chamber (22). A first throttling port (23) is provided on the peripheral wall of the throttling chamber (21), and a second throttling port (24) is provided on the peripheral wall of the pressure stabilizing chamber (22). A flow passage (25) is formed between the outer peripheral surface of the valve sleeve (2) and the inner peripheral surface of the valve body (1). The first throttling port (23) and the second throttling port (24) are communicated via the flow passage (25); A throttling drive assembly (3), including a first adjusting member (31) provided on the outer peripheral wall of the throttling chamber (21), and the first adjusting member (31) reciprocates along the outer peripheral wall of the throttling chamber (21) to control the opening degree of the first throttling port (23); A pressure stabilizing drive assembly (4), including a second adjusting member (41) disposed within the pressure stabilizing chamber (22) and an elastic member (42) supporting the second adjusting member (41). The pressure difference before and after the first throttling port (23) drives the second adjusting member (41) to move to control the opening degree of the second throttling port (24); Further comprising: A first sealing end cover (5) and a second sealing end cover (6) respectively provided on the inlet port (11) and the outlet port (12); The flange of the second sealing end cover (6) is of a hollow structure, and a third throttling port (61) is provided on its peripheral wall, and the third throttling port (61) is correspondingly arranged with the second throttling port (24); The peripheral wall at the third throttling port (61) is configured to be an arc-shaped that bends inwardly towards the second adjusting member (41); Under the action of the pressure generated by the pressure difference, the peripheral wall at the open end position of the second adjusting member (41) gradually extends and moves into the gap between the second throttling port (24) and the third throttling port (61), thereby realizing the adjustment of the inlet flow area at the third throttling port (61).

2. The flow valve according to claim 1, wherein The valve sleeve (2) is configured as a cylindrical structure with both ends open. The first sealing end cover (5) and the second sealing end cover (6) are formed with convex flanges on the end faces facing the valve sleeve (2), and both ends of the valve sleeve (2) are respectively sleeved on the convex flanges.

3. The flow valve according to claim 2, wherein The second adjusting member (41) is configured as a cylindrical structure with one end open, and is embedded within the pressure stabilizing chamber (22), and its open end is movably sleeved on the flange of the second sealing end cover (6); The elastic member (42) is disposed inside the second adjusting member (41), and its two ends respectively abut against the second adjusting member (41) and the flange of the second sealing end cover (6).

4. The flow valve according to claim 3, characterized in that, A partition plate (26) is provided within the valve sleeve (2), and a through hole is provided on the partition plate (26), and a throttling nozzle (7) is provided within the through hole.

5. The flow valve according to claim 4, characterized in that, At least one first flow hole (27) is provided on the peripheral wall of the valve sleeve (2), a second flow hole (43) is correspondingly provided on the peripheral wall of the second adjusting member (41), and the first flow hole (27) is located between the first throttle port (23) and the second throttle port (24).

6. The flow valve according to claim 5, characterized in that, A flow equalizing groove (44) is provided on the peripheral wall of the second adjusting member (41) along its circumferential direction, and the second flow hole (43) is provided at the bottom of the flow equalizing groove (44).

7. The flow valve according to claim 1, wherein The first adjusting member (31) is a sliding sleeve sleeved on the throttle chamber (21).

8. The flow valve according to claim 7, wherein The throttle driving assembly (3) further includes a gear shaft (32) provided on the valve body (1), a rack (33) is provided on the first adjusting member (31), and the rack (33) meshes with the gear section on the gear shaft (32).

9. The flow valve according to claim 8, wherein On one side of the gear shaft (32) close to its driving end, a first sealing ring (34) and a second sealing ring (35) are respectively provided along its axial direction.

10. The flow valve according to claim 9, characterized in that, At the middle position between the first sealing ring (34) and the second sealing ring (35), a drain passage (13) communicating with the outside is provided on the valve body (1).

11. A liquid rocket fuel supply system, characterized in that, Comprising: The flow valve according to any one of claims 1-10.

12. A liquid rocket, characterized in that, Comprising: The flow valve according to any one of claims 1-10; Or the liquid rocket feeding system according to claim 11.

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