Control valve, engine and rocket

Abstract

The present application relates to the technical field of rockets, and particularly relates to a regulating valve, an engine and a rocket. The regulating valve comprises: a first valve body, a fluid passage is formed in the first valve body, a first valve seat and a valve core are arranged in the fluid passage, a first grid structure is formed in the first valve seat, and a second grid structure is formed in the valve core; a driving mechanism is connected with the valve core, used for driving the second grid structure to move, and forming a flow channel with stepless regulation of the flow area between the second grid structure and the first grid structure. The regulating valve, the engine and the rocket provided by the present application can realize stepless regulation of the gas flow by driving the second grid structure to move, and the regulation ratio of the regulating valve is increased, thereby meeting the needs of accurate control of the rocket propellant flow.

Description

Technical Field

[0001] This invention relates to the field of rocket technology, and more particularly to a regulating valve, an engine, and a rocket. Background Technology

[0002] When adjusting the thrust of a rocket engine, related technologies often utilize gas regulating valves to adjust the thrust. The outlet of the gas generator is connected to the turbine inlet and the gas regulating valve, respectively. When the flow rate at the outlet of the gas generator is constant, the flow rate of the turbine is adjusted by regulating the flow rate of the gas regulating valve, thereby adjusting the turbine speed and ultimately adjusting the engine thrust.

[0003] However, most related technologies use gas regulating valves to control propellant flow, which can only achieve step-wise regulation through switching, and have a low regulation ratio, failing to achieve stepless regulation. However, during engine thrust regulation, the regulation accuracy requirements for the regulating valve are high; therefore, a gas regulating valve capable of stepless regulation is needed. Summary of the Invention

[0004] This invention provides a regulating valve, engine, and rocket to address the shortcomings of existing technologies that use gas regulating valves to control propellant flow, which have low regulation ratios and cannot achieve stepless regulation.

[0005] This invention provides a regulating valve, comprising:

[0006] A first valve body has a fluid channel formed inside it. A first valve seat and a valve core are provided in the fluid channel. A first grid structure is formed inside the first valve seat, and a second grid structure is formed inside the valve core.

[0007] A drive mechanism, connected to the valve core, is used to drive the second grille structure to move, thereby forming a flow channel with stepless adjustment of the flow area between the second grille structure and the first grille structure.

[0008] According to the regulating valve provided by the present invention, the valve body includes: a first valve body and a second valve body, the first valve body is connected to the second valve body, and the valve core is movably disposed between the first valve body and the second valve body, and the first valve seat is disposed inside the first valve body;

[0009] A second valve seat is also provided in the fluid channel. The second valve seat is located inside the second valve body. The second valve seat, the valve core, and the first valve seat are connected in sequence along the fluid flow direction to form the flow channel.

[0010] The regulating valve provided by the present invention further includes: a first sealing structure and a second sealing structure; wherein,

[0011] A first valve seat is provided in the first valve body, and a second valve seat is provided in the second valve body. The first sealing structure is provided between the first valve seat and the inner wall of the first valve body, and the second sealing structure is provided between the second valve seat and the inner wall of the second valve body.

[0012] According to the regulating valve provided by the present invention, the first sealing structure includes: a first sealing ring, wherein the first sealing ring is disposed between the outer wall of the first valve seat and the inner wall of the first valve body;

[0013] The second sealing structure includes a second sealing ring, which is disposed between the outer wall of the second valve seat and the inner wall of the second valve body.

[0014] According to the regulating valve provided by the present invention, the first sealing structure further includes: a first gasket, a first elastic element and a first pressure ring, wherein the first gasket, the first elastic element and the first pressure ring are arranged sequentially along one end of the first sealing ring toward the end face of the first valve seat;

[0015] The second sealing structure further includes: a second gasket, a second elastic element, and a second pressure ring, wherein the second gasket, the second elastic element, and the second pressure ring are arranged sequentially along one end of the second sealing ring toward the end face of the second valve seat.

[0016] The regulating valve provided by the present invention further includes: a valve core bushing, a valve stem, and a first connecting member. The valve core bushing is disposed outside the valve core, and one end of the valve core bushing is connected to one end of the first connecting member. The other end of the first connecting member is connected to the driving mechanism via the valve stem.

[0017] A receiving cavity is formed between the first valve body and the second valve body, and the valve core bushing is placed in the receiving cavity and moves within the receiving cavity.

[0018] According to the regulating valve provided by the present invention, an opening structure is formed on the valve core bushing, the first connecting member is a T-shaped connecting member, and the opening structure is engaged with one end of the T-shaped connecting member.

[0019] The regulating valve provided by the present invention further includes: a third sealing structure disposed between the valve stem and the first valve body, the third sealing structure comprising: a packing assembly, a packing ring, and a packing gland, wherein the packing assembly, the packing ring, and the packing gland are arranged sequentially from the inside to the outside along the extension direction from the valve core to the valve stem.

[0020] The regulating valve provided by the present invention further includes: a sealing ring; wherein,

[0021] The first valve body has a mounting groove at the position where it connects with the second valve body, and the sealing ring is disposed in the mounting groove.

[0022] The present invention also provides an engine, comprising: the regulating valve provided by the present invention.

[0023] The present invention also provides a rocket, comprising: a regulating valve provided by the present invention, or an engine provided by the present invention.

[0024] This invention provides a regulating valve, comprising: a first valve body, the first valve body having a fluid channel formed inside, a first valve seat and a valve core disposed within the fluid channel, a first grid structure formed within the first valve seat, and a second grid structure formed within the valve core; a driving mechanism connected to the valve core, used to drive the second grid structure to move, thereby forming a flow channel with stepless adjustment of the flow area between the second grid structure and the first grid structure. This regulating valve, by driving the second grid structure to move through the driving mechanism, can achieve stepless adjustment of the gas flow rate, increasing the regulating ratio of the regulating valve and thus meeting the need for precise control of rocket propellant flow rate.

[0025] Furthermore, the present invention provides an engine that includes the regulating valve in the above embodiments of the present invention, and therefore has the same advantages as described above.

[0026] Furthermore, the present invention provides a rocket that includes the regulating valve or engine in the above embodiments of the present invention, and therefore has the same advantages as described above. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the regulating valve provided in one embodiment of the present invention.

[0029] Figure 2 This is a partial structural schematic diagram of the first sealing ring, the first gasket, the first elastic element, and the first pressure ring provided in one embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the structure of the first valve seat provided in one embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the valve core provided in one embodiment of the present invention.

[0032] Figure 5 This is a schematic diagram of the valve core bushing provided in one embodiment of the present invention.

[0033] Figure label:

[0034] 1: First sealing ring; 2: Packing assembly; 3: Second grid structure; 4: First valve body; 5: Second valve body; 6: First valve seat; 7: Valve core; 8: Valve core bushing; 81: Opening structure; 9: Valve stem; 10: First connecting piece; 11: Bracket; 12: Second connecting piece; 13: Packing gland; 14: Second valve seat; 15: First elastic element; 16: Heat insulation pad; 17: Pin; 18: First pressure ring; 19: Packing pressure ring; 20: First gasket; 21: First grid structure; 22: Sealing ring; 23: Drive mechanism; 25: First screw; 26: Second screw; 27: Nut; 28: Pin. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0036] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and are not intended to 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 embodiment.

[0037] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this embodiment, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this embodiment, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" 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 mechanical connection or an electrical connection; 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 embodiment based on the specific circumstances.

[0039] In embodiments of the present 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," "on top of," and "over" 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.

[0040] The following is combined with Figures 1 to 5 A regulating valve according to the present invention is described. The regulating valve includes: a first valve body 4 and a drive mechanism 23.

[0041] The first valve body 4 has a fluid channel inside, and a first valve seat 6 and a valve core 7 are provided in the fluid channel. A first grid structure 21 is formed in the first valve seat 6, and a second grid structure 3 is formed in the valve core 7. The drive mechanism 23 is connected to the valve core 7 and is used to drive the second grid structure 3 to move, so that a flow channel with stepless adjustment of flow area is formed between the second grid structure 3 and the first grid structure 21.

[0042] Specifically, the first valve body 4 has a hollow structure to form a fluid channel for gas and other fuels. A first valve seat 6 and a valve core 7 are provided in the fluid channel. The first valve seat 6 is fixed inside the first valve body 4, and the valve core 7 is movably disposed inside the first valve body 4. The valve core 7 moves in a plane perpendicular to the line of the fluid channel by the power provided by the drive mechanism 23.

[0043] The first valve seat 6 has a first grid structure 21 machined inside, and the valve core 7 has a second grid structure 3 machined inside. Since the first valve seat 6 is fixed, the first grid structure 21 is also fixed, while the valve core 7 can be moved by the drive mechanism 23. The second grid structure 3 moves synchronously with the valve core 7. During the movement, the first grid structure 21 and the second grid structure 3 form different blocking relationships. Through the blocking relationship between the two, a flow channel for transporting gas with stepless adjustment of the flow area is formed.

[0044] It is understood that both the first grid structure 21 and the second grid structure 3 are composed of alternating baffles and flow channels. The first grid structure 21 has a first flow channel for gas to pass through, and the second grid structure 3 has a second flow channel for gas to pass through.

[0045] In a specific implementation of the present invention, during the process of the driving mechanism 23 driving the valve core 7 to move, at least two extreme states exist:

[0046] When the second flow channel is completely blocked by the baffle in the first grid structure 21, that is, when Figure 1 The structure shown is such that, in this state, the regulating valve is completely closed, and gas cannot pass through;

[0047] When the second flow channel completely overlaps with the first flow channel, the regulating valve is fully open and the gas flow rate in the regulating valve is at its maximum.

[0048] During the adjustment process of the above two states, the position of the second grid structure 3 is adjusted by the drive mechanism 23 so that the blocking relationship between it and the first grid structure 21 is adjustable, and the overlapping area of ​​the first flow channel and the second flow channel is the flow area of ​​the valve body.

[0049] Optionally, the drive mechanism 23 moves the valve core 7 in a direction perpendicular to the fluid channel to ensure that the gas flow can be adjusted by the blocking relationship between the baffles and the flow channel in the first grille structure 21 and the second grille structure 3.

[0050] Optionally, the drive mechanism 23 may be an external motor, cylinder or hydraulic cylinder, etc. In this embodiment, an electric actuator is used.

[0051] As can be seen, the regulating valve provided by the present invention includes: a first valve body 4, a fluid channel formed inside the first valve body 4, a first valve seat 6 and a valve core 7 disposed within the fluid channel, a first grid structure 21 formed within the first valve seat 6, and a second grid structure 3 formed within the valve core 7; a driving mechanism 23 connected to the valve core 7, used to drive the second grid structure 3 to move, thereby forming a flow channel with stepless adjustment of the flow area between the second grid structure 3 and the first grid structure 21. The regulating valve provided by the present invention, by driving the second grid structure 3 to move through the driving mechanism 23, can achieve stepless adjustment of the gas flow rate, increasing the regulation ratio of the regulating valve, thereby meeting the need for precise control of rocket propellant flow rate.

[0052] In one embodiment of the present invention, the regulating valve further includes a second valve body 5. A first valve body 4 is connected to the second valve body 5, and a valve core 7 is movably disposed between the first valve body 4 and the second valve body 5. A first valve seat 6 is disposed inside the first valve body 4. A second valve seat 14 is also provided within the fluid channel, disposed inside the second valve body 5. The second valve seat 14, valve core 7, and first valve seat 6 are sequentially connected along the fluid flow direction to form a flow channel, that is, the second valve seat 14 and the first valve seat 6 are located on the left and right sides of the valve core 7, respectively. Specifically, as... Figure 1 In the structure shown, the first valve body 4 is the right valve body, the second valve body 5 is the left valve body, and the valve core 7 is the middle valve core, which can move up and down under the drive of the drive mechanism 23.

[0053] In one embodiment of the present invention, the valve body is made of a high-temperature alloy material, and the valve core structure can be made of a metal-ceramic or hard alloy material that is resistant to high temperatures, wear, and erosion, thereby enabling normal operation for extended periods in environments with high temperature, high pressure, high speed, and media containing solid particles. Because existing control valves experience a change from room temperature in the assembled state to high temperature in the operating state, the difference in the coefficients of thermal expansion of different component materials leads to an increase in the clearance between the components, causing a backlash in the valve's operation and affecting its accuracy. In this embodiment, the second valve seat 14, valve core 7, and first valve seat 6 are preferably made of a high-temperature alloy substrate coated with zirconium oxide or chromium carbide, which is wear-resistant and erosion-resistant, and the substrate has good toughness and can withstand tensile forces. Furthermore, the valve core 7 and valve core bushing 8 are made of the same material or are an integral structure, eliminating the problem of increased clearance after high temperatures, and offering advantages such as small backlash and high operational accuracy.

[0054] In one embodiment of the present invention, the regulating valve further includes a first sealing structure and a second sealing structure. The first sealing structure is disposed between the inner wall of the first valve seat 6 and the first valve body 4, and the second sealing structure is disposed between the inner wall of the second valve seat 14 and the second valve body 5. Specifically, each of the first valve body 4 and the second valve body 5 has a corresponding valve seat inside, and a sealing structure is correspondingly disposed between the outer wall of the valve seat and the inner wall of the valve body, thereby ensuring the sealing performance of the valve body and preventing the danger of gas leakage.

[0055] In one embodiment of the present invention, the first sealing structure includes a first sealing ring 1 disposed between the outer wall of the first valve seat 6 and the inner wall of the first valve body 4; the second sealing structure includes a second sealing ring disposed between the outer wall of the second valve seat 14 and the inner wall of the second valve body 5. Specifically, the two sealing structures mentioned above each include a sealing ring, which seals the gap between the outer wall of the valve seat and the inner wall of the valve body, thereby improving the airtightness of the inlet and outlet valve seats of the valve body. Figure 2As shown, a partial schematic diagram of the first sealing ring 1 is provided. Similarly, the second sealing ring has a similar structure, but the arrangement position is different, so it will not be described in detail.

[0056] In one embodiment of the present invention, the first sealing structure further includes: a first gasket 20, a first elastic element 15, and a first pressure ring 18, wherein the first gasket 20, the first elastic element 15, and the first pressure ring 18 are arranged sequentially along one end of the first sealing ring 1 toward the end face of the first valve seat 6; the second sealing structure further includes: a second gasket, a second elastic element, and a second pressure ring, wherein the second gasket, the second elastic element, and the second pressure ring are arranged sequentially along one end of the second sealing ring toward the end face of the second valve seat 14.

[0057] Due to the size and specifications of the sealing ring, a gap may exist between the end of the sealing ring and the end face of the valve seat. This embodiment incorporates a gasket, an elastic element, and a pressure ring, which not only provide pre-tightening force for the radial sealing of the sealing ring but also seal the end of the sealing ring against the end face of the valve seat. Specifically, the elastic element can be a disc spring. By compressing the gasket and pressure ring, the pressure ring presses against the sealing ring, and the gasket presses against the valve seat, improving the sealing performance between the sealing ring and the valve seat. Figure 2 As shown, a partial schematic diagram of the first gasket 20, the first elastic element 15, and the first pressure ring 18 is provided. Similarly, the second gasket, the second elastic element, and the second pressure ring are similar to the above structure, except that their arrangement positions are different, so they will not be described in detail again.

[0058] In one embodiment of the present invention, the regulating valve further includes: a valve core bushing 8, a valve stem 9, and a first connecting member 10. The valve core bushing 8 is disposed on the outside of the valve core 7, and one end of the valve core bushing 8 is connected to the first connecting member 10. The other end of the first connecting member 10 is connected to the driving mechanism 23 through the valve stem 9. A receiving cavity is formed between the first valve body 4 and the second valve body 5, and the valve core bushing 8 is placed in the receiving cavity and moves within the receiving cavity. Specifically, the second valve stem 9 is inserted into the first valve body 4, and the driving mechanism 23 drives the valve core 7 to move up and down through the valve stem 9, the first connecting member 10, and the valve core bushing 8. In this embodiment, the valve core bushing 8 is provided on the outside of the valve core. If the valve core is made entirely of ceramic or hard alloy, it cannot directly withstand tensile force and needs to transmit force through the valve core bushing 8, so that the valve core can move in both the up and down directions without any problem. Therefore, a receiving cavity for accommodating the valve core bushing 8 is provided between the left valve body and the right valve body. The valve core bushing 8 is arranged around the valve core 7 and placed in the receiving cavity. The valve core bushing 8 is then connected to the valve stem 9, and the valve stem 9 is connected to the external motor. While controlling the up and down movement of the valve core 7, the connection structure of the valve core and the external motor can be protected.

[0059] In one embodiment of the present invention, an opening structure 81 is formed on the valve core bushing 8, and the first connecting member 10 is a T-shaped connecting member, with the opening structure 81 engaging with one end of the T-shaped connecting member. Specifically, as shown... Figure 5 As shown, the head of the T-shaped connector is larger than its tail. The tail connects to the valve stem 9, and the head engages with the opening structure 81 on the valve core bushing 8, achieving a stable connection between the T-shaped connector and the valve core bushing 8. Alternatively, other structures can be used. For example, the lower end of the valve stem 9 can have an "Ω"-shaped structure, and the valve core bushing 8 can have a matching ball head structure. By assembling the ball head structure with the "Ω"-shaped structure, the T-shaped connector can be replaced, achieving both a fixed connection and vertical movement.

[0060] In one embodiment of the present invention, the regulating valve further includes a third sealing structure disposed between the valve stem 9 and the first valve body 4. The third sealing structure includes a packing assembly 2, a packing ring 19, and a packing gland 13, which are arranged sequentially from the inside to the outside along the extension direction from the valve core 7 to the valve stem 9. In this embodiment, a third sealing structure is provided between the valve stem 9 and the valve body to prevent gas leakage from the gap between the valve stem 9 and the first valve body 4 during the movement of the valve stem 9. Specifically, the third sealing structure includes a packing assembly 2, a packing ring 19, and a packing gland 13. The packing assembly 2 is filled between the valve stem 9 and the first valve body 4 for sealing, and the packing ring 19 and the packing gland 13 are arranged sequentially on the packing assembly 2 to provide a tight sealing force.

[0061] In one embodiment of the present invention, a sealing ring 22 is further included; wherein the first valve body 4 is provided with a mounting groove at the position where it connects with the second valve body 5, and the sealing ring 22 is disposed in the mounting groove. Preferably, the sealing ring 22 may be a graphite ring, and the first valve body 4 is provided with an annular mounting groove to fix the annular graphite ring in the annular mounting groove, so as to ensure the sealing performance between the first valve body 4 and the second valve body 5.

[0062] In one embodiment of the present invention, the first valve body 4 and the second valve body 5 are fixedly connected by a first screw 25. A bracket 11 is provided between the first valve body 4 and the drive mechanism 23, and a heat insulation pad 16 is provided between the bracket 11 and the upper surface of the first valve body 4 to prevent heat from being transferred to the drive mechanism 23 and causing damage to the drive mechanism 23. The drive mechanism 23, the bracket 11, the heat insulation pad 16 and the first valve body 4 are fixedly connected by a second screw 26. The fixed bracket 11 has a square frame structure.

[0063] In one embodiment of the present invention, the drive mechanism 23 is connected to the valve stem 9 via a pin 17 and a second connecting member 12. The pin 17 and the output shaft of the drive mechanism 23 are prevented from coming out by a pin 28. The second connecting member 12 and the valve stem 9 are connected by a nut 27. The purpose of the nut 27 is that, due to the influence of tolerance, the valve stem 9 and the second connecting member 12 cannot be directly tightened. The depth of their tightening needs to be adjustable. Therefore, the two are a loose connection and need to be tightened by the nut to eliminate the thread gap between them.

[0064] The present invention also provides an engine. This engine includes the regulating valve described in the above embodiments of the present invention.

[0065] The present invention provides an engine that includes the regulating valve in the above embodiments of the present invention, and therefore has the same advantages as described above.

[0066] The present invention also provides a rocket. The rocket includes: a regulating valve as described in the above embodiments of the present invention, or an engine as described in the above embodiments of the present invention.

[0067] The present invention provides a rocket that includes the regulating valve or engine in the above embodiments of the present invention, and therefore has the same advantages as described above.

[0068] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A regulating valve, characterized in that The adjusting valve comprises: a first valve body (4) internally formed with a fluid passage, a first valve seat (6) and a valve core (7) being arranged in the fluid passage, the first valve seat (6) being internally formed with a first grid structure (21), and the valve core (7) being internally formed with a second grid structure (3); a driving mechanism (23) connected with the valve core (7) and used for driving the second grid structure (3) to move and forming a flow channel with stepless regulation of flow area between the second grid structure (3) and the first grid structure (21); further comprising a second valve body (5), the first valve body (4) being connected with the second valve body (5), and the valve core (7) being movably arranged between the first valve body (4) and the second valve body (5), and the first valve seat (6) being arranged in the first valve body (4); a second valve seat (14) being further arranged in the fluid passage, the second valve seat (14) being arranged in the second valve body (5), and the second valve seat (14), the valve core (7) and the first valve seat (6) being sequentially connected in a fluid flow direction to form the flow channel; further comprising a first sealing structure and a second sealing structure; wherein the first sealing structure is arranged between the first valve seat (6) and an inner wall of the first valve body (4), and the second sealing structure is arranged between the second valve seat (14) and an inner wall of the second valve body (5); the first sealing structure comprises a first sealing ring (1) arranged between an outer wall of the first valve seat (6) and the inner wall of the first valve body (4); the second sealing structure comprises a second sealing ring arranged between an outer wall of the second valve seat (14) and the inner wall of the second valve body (5).

2. The adjusting valve according to claim 1, wherein the first sealing structure further comprises a first gasket (20), a first elastic member (15) and a first compression ring, the first gasket (20), the first elastic member (15) and the first compression ring being sequentially arranged along an end of the first sealing ring (1) in a direction towards an end face of the first valve seat (6); the second sealing structure further comprises a second gasket, a second elastic member and a second compression ring, the second gasket, the second elastic member and the second compression ring being sequentially arranged along an end of the second sealing ring in a direction towards an end face of the second valve seat (14).

3. The regulating valve according to claim 1, characterized in that further comprising: a valve core bushing (8), a valve rod (9) and a first connecting member (10), the valve core bushing (8) being arranged outside the valve core (7), the valve core bushing (8) being connected with one end of the first connecting member (10), and the other end of the first connecting member (10) being connected with the driving mechanism (23) through the valve rod (9); wherein an accommodating cavity is formed between the first valve body (4) and the second valve body (5), and the valve core bushing (8) is arranged in the accommodating cavity and moves in the accommodating cavity.

4. The regulating valve according to claim 3, characterized in that An opening structure (81) is formed on the valve core bushing (8), the first connecting piece (10) is a T-shaped connecting piece, and the opening structure (81) is clamped with one end of the T-shaped connecting piece.

5. The regulating valve according to claim 3, characterized in that Further comprising: A third sealing structure is arranged between the valve rod (9) and the first valve body (4), and the third sealing structure comprises a packing assembly (2), a packing pressing ring (19) and a packing gland (13), which are sequentially arranged from inside to outside along the extension direction of the valve core (7) to the valve rod (9).

6. The regulating valve according to any one of claims 1 to 5, characterized in that Further comprising: A sealing ring (22); wherein The first valve body (4) is provided with a mounting groove at the position connected with the second valve body (5), and the sealing ring (22) is arranged in the mounting groove.

7. An engine characterized by, Comprising: The regulating valve according to any one of claims 1 to 6.

8. A rocket, characterized in that Comprising: The engine according to claim 7. ​

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