A liquid rocket unloading type flow regulator and liquid rocket thrust system

Abstract

This invention relates to an unloading-type flow regulator for liquid rockets and a liquid rocket thrust system. The unloading-type flow regulator for liquid rockets includes a housing, a drive mechanism, a valve core, and a valve seat. The housing has a propellant inlet and a propellant outlet. The valve seat is fixed inside the housing, dividing the housing into an inlet chamber and an outlet chamber. The inlet chamber communicates with the propellant inlet, and the outlet chamber communicates with the propellant outlet. The valve core is rotatably installed inside the outlet chamber of the housing. The drive mechanism is installed outside the housing. The drive end of the drive mechanism is coaxially fixedly connected to one end of the valve core and is used to drive the valve core to rotate. An adjusting plate and a support plate are coaxially fixed on the valve core. The other end of the valve core is rotatably engaged with the center position of the valve seat. The adjusting plate is arranged adjacent to the valve seat. The support plate is rotatably connected to the inner sidewall of the housing in a sealing manner. The adjusting plate has at least one first adjusting hole, and the valve seat has at least one second adjusting hole. The first adjusting hole and the second adjusting hole are staggered, partially overlap, or completely overlap.

Description

Technical Field

[0001] This invention relates to the technical field of liquid rocket engines, specifically to an unloading-type flow regulator and a liquid rocket thrust system for liquid rockets. Background Technology

[0002] Liquid rocket engines are the core power units of launch vehicles and spacecraft. Flow regulation is a crucial technology for achieving thrust control, stable mixture ratios, variable operating conditions, and reusability, directly determining the engine's reliability and mission adaptability. Currently, most traditional liquid rocket engine flow regulators employ a non-unloading structure. Under the action of high-pressure, high-flow-rate propellant media, the valve core bears axial unbalanced forces, resulting in high load on the drive mechanism, slow response, low regulation accuracy, and easy seal failure, making it difficult to meet the requirements of rocket engines. Furthermore, the existing regulators have poor linearity in their flow characteristic curves, which is detrimental to variable thrust regulation and rocket recovery.

[0003] Therefore, developing a flow regulator with simple structure, fast response, high adjustment accuracy, and high linearity of flow characteristic curve is of great significance for improving the control performance and reliability of liquid rocket engine propulsion system. Summary of the Invention

[0004] In order to solve one or more technical problems existing in the prior art, the present invention provides a deloading-type flow regulator for liquid rockets and a liquid rocket thrust system.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: The present invention provides a liquid rocket unloading type flow regulator, including a shell, a drive mechanism, a valve core and a valve seat. The shell has a propellant inlet and a propellant outlet. The valve seat is fixed inside the shell. The valve seat divides the shell into an inlet chamber and an outlet chamber. The inlet chamber is connected to the propellant inlet and the outlet chamber is connected to the propellant outlet. The valve core is rotatably installed inside the outlet cavity of the housing, and the drive mechanism is installed outside the housing. The drive end of the drive mechanism is coaxially fixedly connected to one end of the valve core and is used to drive the valve core to rotate. The valve core is coaxially fixed with an adjustment plate and a support plate, both of which are circular. The other end of the valve core is rotatably engaged with the center position of the valve seat. The adjustment plate is arranged adjacent to the valve seat, and the support plate is rotatably sealed to the inner side wall of the housing. The adjustment plate has at least one axially penetrating first adjustment hole, and the valve seat has at least one axially penetrating second adjustment hole. During the process of the drive mechanism driving the valve core to rotate, the first adjustment hole and the second adjustment hole are misaligned, partially overlapped, or completely overlapped.

[0006] The beneficial effects of the present invention are as follows: The unloading type flow regulator for liquid rockets of the present invention solves the problem of nonlinearity of the flow characteristic curve of the previous regulator by setting an adjustment plate on the valve core, opening a first adjustment hole on the adjustment plate, and opening a second adjustment hole on the valve seat, which is beneficial to the variable thrust of rocket engines and rocket recovery.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the first adjustment hole is a fan-shaped structure with the center of the adjustment disc as the center, and the second adjustment hole is a fan-shaped structure with the center of the valve seat as the center.

[0009] The beneficial effect of adopting the above-mentioned further solution is that by setting the regulating orifice to a fan-shaped structure, linear regulation of the flow rate can be achieved.

[0010] Furthermore, the number of the first adjustment holes and the number of the second adjustment holes are equal, and the shape, size and arrangement of the first adjustment holes and the second adjustment holes are the same.

[0011] Furthermore, a guide sleeve is installed inside the outlet cavity. The guide sleeve is sleeved on the outer peripheral side wall of one end of the valve core. The guide sleeve is fixedly connected to the housing. The guide sleeve is sealed and rotated with the valve core and the support plate respectively. The support plate, the valve core and the guide sleeve together form an unloading cavity. An unloading flow channel is opened on the valve core, and the unloading flow channel connects the inlet cavity and the unloading cavity.

[0012] The beneficial effects of adopting the above-mentioned further solution are: by setting up an unloading cavity and an unloading flow channel, the problem of large axial medium force on the moving parts of the regulator is solved, which is conducive to improving the regulation accuracy and stability of the regulator.

[0013] Furthermore, the guide sleeve has an inner ring edge at one end adjacent to the drive mechanism, the inner ring edge is in a sealing and rotatable engagement with the outer peripheral sidewall of the valve core, the guide sleeve is in a sealing and rotatable engagement with the inner sidewall of the housing at the outlet, and the inner sidewall of the guide sleeve at the end away from the drive mechanism is in a sealing and rotatable engagement with the outer peripheral sidewall of the support plate.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the guide sleeve is provided with an inner ring edge, which facilitates sealing and rotational engagement with the valve core.

[0015] Furthermore, the guide sleeve has an outer ring edge at one end adjacent to the drive mechanism, the housing has an assembly port, and an outer flange edge is provided at the assembly port. The guide sleeve is sealed and inserted into the housing from the assembly port, the outer ring edge abuts against the outer flange edge, and a cover plate is also pressed onto the outer ring edge. The cover plate, the outer ring edge, the outer flange edge, and the drive mechanism are fixedly connected by bolts, and a heat insulation gasket is provided between the drive mechanism and the cover plate.

[0016] The beneficial effect of adopting the above-mentioned further solution is that by setting the outer ring edge, outer flange edge and cover plate, it is convenient to stably assemble the guide sleeve and the housing.

[0017] Furthermore, the drive mechanism is mounted on the cover plate, and the drive end of the drive mechanism is coaxially and fixedly connected to one end of the valve core through a connecting shaft. The connecting shaft moves through the cover plate and is inserted into the positioning groove at one end of the valve core.

[0018] Furthermore, one end of the valve core is rotatably connected to the inner wall of the cover plate via a first bearing, the inner ring of the first bearing is fixedly connected to the outer peripheral wall of one end of the valve core, and the outer ring of the first bearing is tightly fitted to the inner wall of the cover plate via an adjusting shim.

[0019] Furthermore, a positioning cylinder is provided on the outer periphery of the adjusting disc. The positioning cylinder is located on the side of the adjusting disc away from the valve seat, and the positioning cylinder is rotatably connected to the inner wall of the housing through a second bearing.

[0020] The beneficial effect of adopting the above-mentioned further solution is that by setting a positioning cylinder, it is convenient to achieve stable assembly between the adjusting disc and the housing.

[0021] The present invention also provides a liquid rocket thrust system, including a liquid rocket unloading flow regulator as described above, and further including a turbopump and a thrust chamber. The propellant outlet of the turbopump is connected and communicated with the propellant inlet through a pipeline, and the propellant outlet is connected and communicated with the thrust chamber through a pipeline.

[0022] The beneficial effects of the present invention are: the liquid rocket thrust system of the present invention adopts the above-mentioned unloading flow regulator, which solves the problem of nonlinearity of the flow characteristic curve of the previous regulator, and is beneficial to the variable thrust of the rocket engine and the recovery of the rocket. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the unloading flow regulator for liquid rockets according to the present invention. Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle; Figure 3 for Figure 1Enlarged structural diagram of section B in the middle; Figure 4 This is a cross-sectional view of the valve core of the present invention. Figure 5 This is a cross-sectional view of the valve seat of the present invention; Figure 6 This is a schematic diagram of the structure of the adjustment disc of the present invention.

[0024] The following is a list of components represented by each label in the attached diagram: 1. Shell; 11. Propellant inlet; 12. Propellant outlet; 13. Inlet chamber; 14. Outlet chamber; 15. Unloading chamber; 17. Outer flange; 18. Cover plate; 19. Bolt; 190. Thermal insulation gasket; 191. Plug; 2. Drive mechanism; 21. Connecting shaft; 3. Valve core; 31. Adjusting disc; 32. Support disc; 33. First adjusting hole; 34. Positioning groove; 35. First bearing; 36. Adjusting shim; 37. Positioning cylinder; 38. Second bearing; 39. Unloading flow channel; 4. Valve seat; 41. Second adjusting hole; 5. Guide sleeve; 51. Inner ring edge; 52. Outer ring edge; 6. First transcontinental ring; 61. Second transcontinental ring; 62. Third transcontinental ring. Detailed Implementation

[0025] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0026] Example 1 like Figures 1-6 As shown, a liquid rocket unloading flow regulator according to this embodiment includes a housing 1, a drive mechanism 2, a valve core 3, and a valve seat 4. The housing 1 has a propellant inlet 11 and a propellant outlet 12. The valve seat 4 is fixed inside the housing 1. The valve seat 4 divides the housing 1 into an inlet chamber 13 and an outlet chamber 14. The inlet chamber 13 is connected to the propellant inlet 11, and the outlet chamber 14 is connected to the propellant outlet 12. The valve core 3 is rotatably installed inside the outlet 14 of the housing 1. The drive mechanism 2 is installed outside the housing 1. The drive end of the drive mechanism 2 is coaxially fixedly connected to one end of the valve core 3 and is used to drive the valve core 3 to rotate. The valve core 3 is coaxially fixed with an adjustment disk 31 and a support disk 32, both of which are circular. The other end of the valve core 3 is rotatably engaged with the center position of the valve seat 4. The adjustment disk 31 is arranged adjacent to the valve seat 4. The support disk 32 is rotatably connected to the inner side wall of the housing 1. The adjustment disk 31 is provided with at least one axially penetrating first adjustment hole 33. The valve seat 4 is provided with at least one axially penetrating second adjustment hole 41. During the process of the drive mechanism 2 driving the valve core 3 to rotate, the first adjustment hole 33 and the second adjustment hole 41 are misaligned, partially overlapped, or completely overlapped.

[0027] like Figure 1 , Figure 5 and Figure 6 As shown, in a preferred embodiment, the first adjusting hole 33 is a fan-shaped structure with the center of the adjusting disc 31 as the center, and the second adjusting hole 41 is a fan-shaped structure with the center of the valve seat 4 as the center. By setting the adjusting holes as fan-shaped structures, linear flow rate adjustment can be achieved.

[0028] Furthermore, such as Figure 5 and Figure 6 As shown, the number of the first adjusting holes 33 and the number of the second adjusting holes 41 are equal, and the shape, size, and arrangement of the first adjusting holes 33 and the second adjusting holes 41 are the same. For example, two first adjusting holes 33 can be provided, arranged in a symmetrical fan shape; two second adjusting holes 41 can also be provided, arranged in a symmetrical fan shape, such as... Figure 5 and Figure 6 As shown.

[0029] like Figure 1 and Figure 2 As shown, preferably, a positioning cylinder 37 is provided on the outer periphery of the adjusting disc 31. The positioning cylinder 37 is located on the side of the adjusting disc 31 opposite to the valve seat 4, and the positioning cylinder 37 is rotatably connected to the inner wall of the housing 1 through a second bearing 38. By providing the positioning cylinder, stable assembly between the adjusting disc and the housing is facilitated.

[0030] like Figure 1 As shown, in this embodiment, the housing 1 has an opening at one end along the axial direction of the valve core 3, and a plug 191 is sealed and installed at this opening. The plug 191 is arranged adjacent to the propellant inlet 11. The plug is sealed by a small sealing gasket.

[0031] In this embodiment, the propellant inlet 11 and propellant outlet 12 are arranged in parallel on opposite side walls of the housing 1. Figure 1 As shown, the propellant enters the inlet chamber 13 of the casing 1 through the propellant inlet 11 along arrow C, and flows out from the propellant outlet 12 along arrow D in the outlet chamber 14.

[0032] In this embodiment, the drive mechanism 2 can be a motor.

[0033] The unloading-type flow regulator for liquid rockets in this embodiment solves the problem of nonlinear flow characteristic curve of the previous regulator by setting an adjustment plate on the valve core, opening a first adjustment hole on the adjustment plate, and opening a second adjustment hole on the valve seat. This is beneficial for variable thrust of rocket engines and rocket recovery.

[0034] Example 2 Based on Example 1, this example also proposes a preferred structure for an unloading-type flow regulator for liquid rockets, such as... Figure 1 and Figure 3 As shown, a guide sleeve 5 is also installed inside the outlet cavity 14. The guide sleeve 5 is sleeved on the outer peripheral side wall of one end of the valve core 3. The guide sleeve 5 is fixedly connected to the housing 1. The guide sleeve 5 is in sealing and rotating cooperation with the valve core 3 and the support plate 32 respectively. The support plate 32, the valve core 3 and the guide sleeve 5 together form an unloading cavity 15. An unloading flow channel 39 is opened on the valve core 3, and the unloading flow channel 39 connects the inlet cavity 13 and the unloading cavity 15. By setting the unloading cavity and the unloading flow channel, the problem of large axial medium force of the moving parts of the regulator is solved, which is beneficial to improving the regulation accuracy and stability of the regulator.

[0035] like Figure 1 and Figure 3 As shown, specifically, the guide sleeve 5 has an inner ring edge 51 at one end adjacent to the drive mechanism 2. The inner ring edge 51 is in a sealing and rotatable engagement with the outer peripheral sidewall of the valve core 3. The guide sleeve 5 is in a sealing and rotatable engagement with the inner sidewall of the housing 1 at the outlet 14. The inner sidewall of the guide sleeve 5 at the end away from the drive mechanism 2 is in a sealing and rotatable engagement with the outer peripheral sidewall of the support plate 32. The guide sleeve has an inner ring edge to facilitate a sealing and rotatable engagement with the valve core.

[0036] like Figure 1 and Figure 3As shown, in a further preferred embodiment, the guide sleeve 5 has an outer ring edge 52 at one end adjacent to the drive mechanism 2. The housing 1 has an assembly opening with an outer flange edge 17 at the assembly opening. The guide sleeve 5 is sealed and inserted into the housing 1 through the assembly opening. The outer ring edge 52 abuts against the outer flange edge 17. A cover plate 18 is also pressed onto the outer ring edge 52. The cover plate 18, outer ring edge 52, outer flange edge 17, and drive mechanism 2 are fixedly connected by bolts 19. A heat insulation gasket 190 is provided between the drive mechanism 2 and the cover plate 18. The outer ring edge, outer flange edge, and cover plate facilitate stable assembly between the guide sleeve and the housing.

[0037] Specifically, such as Figure 1 and Figure 3 As shown, the drive mechanism 2 is mounted on the cover plate 18. The drive end of the drive mechanism 2 is coaxially and fixedly connected to one end of the valve core 3 through the connecting shaft 21. The connecting shaft 21 moves through the cover plate 18 and is inserted into the positioning groove 34 at one end of the valve core 3.

[0038] Optional, such as Figure 1 and Figure 3 As shown, one end of the valve core 3 is rotatably connected to the inner sidewall of the cover plate 18 via a first bearing 35. The inner ring of the first bearing 35 is fixedly connected to the outer peripheral sidewall of one end of the valve core 3. The outer ring of the first bearing 35 is tightly fitted to the inner sidewall of the cover plate 18 via an adjusting shim 36.

[0039] Specifically, such as Figure 3 As shown, the outer peripheral wall of the support plate 32 and the inner sidewall of the guide sleeve 5 away from the drive mechanism 2 are sealed and rotated together by a first sealing ring 6. The guide sleeve 5 and the inner sidewall of the housing 1 at the outlet 14 are sealed and rotated together by a second sealing ring 61. The guide sleeve 5 and the housing 1 do not rotate relative to each other. The inner ring edge 51 of the guide sleeve 5 is sealed and rotated together with the outer peripheral wall of the valve core 3 adjacent to the drive mechanism by a third sealing ring 62.

[0040] This embodiment of a liquid rocket unloading-type flow regulator is a normally closed window regulating valve. In the closed state, the regulating hole on the valve seat and the regulating hole on the valve core are misaligned. After power is applied, the motor rotates according to the corresponding instructions, driving the valve core to rotate via the connecting shaft. When the regulating hole on the valve core begins to overlap with the regulating hole on the valve seat, working fluid begins to flow through the regulator. When the regulating hole on the valve core and the regulating hole on the valve seat are completely overlapped, the flow rate reaches its maximum. This flow regulator controls the flow rate by adjusting the overlapping area of ​​the regulating holes on the valve core and the valve seat.

[0041] An unloading channel is provided on the valve core shaft, and the unloading channel is connected to the unloading chamber. Existing regulators do not have an unloading function, resulting in excessive axial medium force on the moving mechanism, affecting the regulation accuracy. By providing an unloading channel on the valve core shaft, the high-pressure medium in the inlet chamber (i.e., the high-pressure chamber) can be diverted to the unloading chamber, so that both the front and back surfaces of the valve core support plate are subjected to medium force, thereby offsetting part of the axial medium force on the valve core, which is very beneficial to the stable regulation of the regulator.

[0042] Example 3 This embodiment provides a liquid rocket thrust system, including a liquid rocket unloading flow regulator as described in Embodiment 1 or Embodiment 2 above, and also includes a turbopump and a thrust chamber. The propellant outlet of the turbopump is connected to and communicates with the propellant inlet 11 through a pipeline, and the propellant outlet 12 is connected to and communicates with the thrust chamber through a pipeline.

[0043] The liquid rocket thrust system in this embodiment uses the aforementioned unloading-type flow regulator, which solves the problem of nonlinearity in the flow characteristic curve of the previous regulator, and is beneficial for variable thrust of the rocket engine and rocket recovery.

[0044] In the description of this invention, it should be understood that the terms "center", "inner", "outer", "axial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A deloading-type flow regulator for liquid rockets, characterized in that, The device includes a housing, a drive mechanism, a valve core, and a valve seat. The housing has a propellant inlet and a propellant outlet. The valve seat is fixed inside the housing and divides the housing into an inlet chamber and an outlet chamber. The inlet chamber is connected to the propellant inlet, and the outlet chamber is connected to the propellant outlet. The valve core is rotatably installed inside the outlet cavity of the housing, and the drive mechanism is installed outside the housing. The drive end of the drive mechanism is coaxially fixedly connected to one end of the valve core and is used to drive the valve core to rotate. The valve core is coaxially fixed with an adjustment plate and a support plate, both of which are circular. The other end of the valve core is rotatably engaged with the center position of the valve seat. The adjustment plate is arranged adjacent to the valve seat, and the support plate is rotatably sealed to the inner side wall of the housing. The adjustment plate has at least one axially penetrating first adjustment hole, and the valve seat has at least one axially penetrating second adjustment hole. During the process of the drive mechanism driving the valve core to rotate, the first adjustment hole and the second adjustment hole are misaligned, partially overlapped, or completely overlapped.

2. The unloading type flow regulator for a liquid rocket according to claim 1, wherein The first adjustment hole is a fan-shaped structure with the center of the adjustment disc as the center, and the second adjustment hole is a fan-shaped structure with the center of the valve seat as the center.

3. The unloading type flow regulator for liquid rocket according to claim 1, wherein The number of the first adjustment holes and the number of the second adjustment holes are equal, and the shape, size and arrangement of the first adjustment holes and the second adjustment holes are the same.

4. The unloading type flow regulator for liquid rocket according to claim 1, wherein A guide sleeve is also installed inside the outlet cavity. The guide sleeve is sleeved on the outer peripheral side wall of one end of the valve core. The guide sleeve is fixedly connected to the housing. The guide sleeve is sealed and rotated with the valve core and the support plate respectively. The support plate, the valve core and the guide sleeve together form an unloading cavity. An unloading flow channel is opened on the valve core, and the unloading flow channel connects the inlet cavity and the unloading cavity.

5. The unloading type flow regulator for liquid rocket according to claim 4, wherein The guide sleeve has an inner ring edge at one end adjacent to the drive mechanism. The inner ring edge is in a sealing and rotatable engagement with the outer peripheral sidewall of the valve core. The guide sleeve is in a sealing and rotatable engagement with the inner sidewall of the housing at the outlet. The inner sidewall of the guide sleeve at the end away from the drive mechanism is in a sealing and rotatable engagement with the outer peripheral sidewall of the support plate.

6. The unloading type flow regulator for liquid rocket according to claim 4, wherein The guide sleeve has an outer ring edge at one end adjacent to the drive mechanism. The housing has an assembly port with an outer flange edge. The guide sleeve is sealed and inserted into the housing through the assembly port. The outer ring edge abuts against the outer flange edge. A cover plate is also pressed onto the outer ring edge. The cover plate, outer ring edge, outer flange edge, and drive mechanism are fixedly connected by bolts. A heat insulation gasket is provided between the drive mechanism and the cover plate.

7. The unloading type flow regulator for liquid rocket according to claim 6, wherein The drive mechanism is mounted on the cover plate. The drive end of the drive mechanism is coaxially and fixedly connected to one end of the valve core via a connecting shaft. The connecting shaft moves through the cover plate and is inserted into the positioning groove at one end of the valve core.

8. The unloading type flow regulator for liquid rocket according to claim 6, wherein One end of the valve core is rotatably connected to the inner wall of the cover plate via a first bearing. The inner ring of the first bearing is fixedly connected to the outer peripheral wall of one end of the valve core. The outer ring of the first bearing is tightly fitted to the inner wall of the cover plate via an adjusting shim.

9. The unloading type flow regulator for liquid rocket according to claim 1, wherein A positioning cylinder is provided on the outer periphery of the adjusting disc. The positioning cylinder is located on the side of the adjusting disc away from the valve seat. The positioning cylinder is rotatably connected to the inner wall of the housing through a second bearing.

10. A liquid rocket thrust system characterized by, The device includes a liquid rocket unloading flow regulator as described in any one of claims 1 to 9, and further includes a turbopump and a thrust chamber, wherein the propellant outlet of the turbopump is connected and communicates with the propellant inlet via a pipeline, and the propellant outlet is connected and communicates with the thrust chamber via a pipeline.

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