A lightweight integrated component for spacecraft thermal control

Abstract

In order to solve the problems of redundant distribution of thermal control system units and conduits, large system mass and occupied space, the present invention provides a lightweight integrated component for thermal control of spacecraft, including a compensator, an inlet pipe, a main pump, a backup pump, a mounting base plate, an automatic control valve, an inlet pressure sensor, an outlet pressure sensor, a welding conduit and a filter element, etc. The blower is integrated in the interface connecting the inlet pipe and the compensator, and the inlet pipe is provided with a filling and exhaust valve interface and a component inlet; the inlet pipe is connected to the compensator through the interface integrated with the blower, connected to the inlet of the main pump, and connected to the inlet of the backup pump through a welding conduit, and connected to the inlet pressure sensor through a welding conduit; the automatic control valve is respectively connected to the outlet of the main pump and the outlet of the backup pump, and is connected to the outlet pressure sensor through a welding conduit, and the component outlet is provided on the automatic control valve; the external pipeline is respectively connected to the component inlet and the component outlet to form a fluid circuit, and the fluid circuit is filled with working fluid through the filling and exhaust valve interface.

Description

Technical Field

[0001] The invention relates to a lightweight integrated component for thermal control of a spacecraft, and belongs to the field of thermal control fluid systems for spacecraft. Background Art

[0002] As spacecraft functions become more and more demanding, the types of equipment are increasing, the heat generation power is increasing, and the requirements for thermal control systems are getting higher and higher. The flexibility and controllability of active thermal control solutions are widely recognized. Active thermal control systems have the characteristics of many types of units and complex pipelines. In previous thermal control systems, each unit was suspended in the spacecraft, and the fluid pipelines between the units were complicated and occupied a large space inside the spacecraft. Summary of the invention

[0003] The technical problem to be solved by the present invention is: to solve the problems of the existing thermal control system, such as the redundant distribution of single machines and ducts, the large system mass and occupied space, and to overcome the deficiencies of the existing thermal control system technology, and to provide a lightweight integrated component for spacecraft thermal control.

[0004] The technical solution adopted by the present invention is: a lightweight integrated component for thermal control of spacecraft, characterized in that it includes a compensator, an inlet pipe, a main pump, a backup pump, a mechanical pump support, a mounting base plate, an automatic control valve, an inlet pressure sensor, an outlet pressure sensor, a pressure sensor support, a compensator support, a welding conduit and a filter element;

[0005] The compensator is fixed to one side of the installation base plate through the compensator support, and the main pump and the backup pump are fixed to the other side of the installation base plate through the mechanical pump support; the inlet pressure sensor and the outlet pressure sensor are fixed to the installation base plate through the pressure sensor support, and are located between the main pump and the backup pump;

[0006] The inlet pipe is installed on the installation base plate, the filter element is built into the inlet pipe, the blower is integrated in the interface connecting the inlet pipe and the compensator, and the inlet pipe is provided with a discharge valve interface and a component inlet; the inlet pipe is connected to the compensator through the interface integrated with the blower, the inlet pipe is connected to the inlet of the main pump, and is connected to the inlet of the backup pump through a welded conduit, and is connected to the inlet pressure sensor through a welded conduit;

[0007] The automatic control valve is installed on the installation base plate. The automatic control valve is connected to the outlet of the main pump and the outlet of the backup pump respectively, and is connected to the outlet pressure sensor through a welded conduit. A component outlet is set on the automatic control valve; the external pipeline is connected to the component inlet and the component outlet to form a fluid circuit, and the working fluid is added to the fluid circuit through the filling and discharging valve interface.

[0008] Furthermore, the compensator is used to balance the pressure fluctuations of the fluid circuit caused by temperature changes, and provide working fluid compensation for the circuit when the circuit leaks; the compensator includes a storage tank, a metal bellows and an inflation cut-off valve, the storage tank is a cylindrical metal thin-walled structure, which is equipped with a metal bellows; an air cavity is formed between the metal bellows and the storage tank, and the air cavity is filled with a helium-nitrogen mixture; the inner cavity of the metal bellows is filled with liquid working fluid; the inflation cut-off valve is installed at the top of the compensator storage tank, and is used to fill the air cavity in the compensator with helium and nitrogen. When the air cavity pressure reaches the required value, the cut-off valve is closed to ensure the sealing of the nitrogen; the compensator is arranged at the inlet of the component, and the liquid level of the compensator is judged by monitoring the inlet pressure sensor.

[0009] Furthermore, an inlet pressure transmission pipe threaded joint, a main pump inlet plunger joint, a standby pump inlet threaded joint and a compensator inlet plunger joint are also provided on the inlet pipe; the inlet pipe is connected to the inlet threaded joint of the main pump through the main pump inlet plunger joint, the inlet pipe is connected to the inlet threaded joint of the backup pump through the standby pump inlet threaded joint and the welded conduit, and the inlet pipe is connected to the inlet pressure sensor through the inlet pressure transmission pipe threaded joint and the welded conduit; the inlet pipe is connected to the compensator's threaded joint through the compensator inlet plunger joint, and a blower channel and a channel for communicating with the compensator are provided in the compensator inlet plunger joint.

[0010] Furthermore, the main pump and the backup pump are centrifugal pumps, and the outlets of the main pump and the backup pump are plunger joints, which are directly connected to the threaded joints of the automatic control valve respectively.

[0011] Furthermore, the automatic control valve is connected to the outlet plunger joint of the main pump through the main pump outlet threaded joint, is connected to the outlet plunger joint of the backup pump through the backup pump outlet threaded joint, and is connected to the outlet pressure sensor through the outlet pressure transmission pipe threaded joint and the welded conduit.

[0012] Furthermore, the internal valve core of the automatic control valve controls the flow direction of the fluid according to the pressure status of the outlet ends of the main pump and the backup pump.

[0013] Furthermore, the outlet plunger joints of the main pump and backup pump and the main pump inlet plunger joint and compensator inlet plunger joint of the inlet pipe all include a plunger column, a sleeve nut and a stainless steel ball. The plunger joint can be directly docked with the threaded joint. The plunger column is used to be inserted into the center hole of the threaded joint. An annular protrusion structure and an annular groove are provided on the outer wall of the plunger column, and an annular groove is provided on the inner wall of the sleeve nut; the sleeve nut is sleeved on the plunger column for threaded connection with the threaded joint; the stainless steel ball is installed between the sleeve nut and the plunger column, and is limited by the annular groove on the outer wall of the plunger column, the annular protrusion structure and the annular groove on the inner wall of the sleeve nut to ensure that the sleeve nut rotates normally and does not fall out.

[0014] Furthermore, the inlet pressure sensor and the outlet pressure sensor measure the pressure at the component inlet and the component outlet respectively to obtain the pressure difference between the inlet and the outlet.

[0015] Furthermore, by adjusting the installation positions of the compensator and the main pump, backup pump, automatic control valve, inlet pressure sensor, and outlet pressure sensor, the geometric center of the thermal control integrated assembly is placed in the middle of the installation base plate.

[0016] The fluid used for thermal control of the spacecraft enters the inlet pipe through the component inlet, and enters the inlet end of the main pump and the backup pump after being filtered by the filter element; the main pump and the backup pump select the corresponding pump to be opened according to the thermal control requirements, and the fluid is pressurized by the corresponding pump and pushes the valve core of the automatic control valve to the outlet end of the other pump, realizing the reverse sealing function of the pump and preventing the pump impeller from reversing.

[0017] The beneficial effects of the present invention compared with the prior art are:

[0018] (1) The integrated thermal control assembly of the present invention integrates most of the key units in the thermal control circuit on a base plate, which can realize most of the functions of the entire thermal control fluid circuit. In addition to the assembly, the regulating valve and heat exchanger and other units are added to form the entire fluid circuit. The individual units (including compensators, main pumps, backup pumps, automatic control valves, inlet pressure sensors, and outlet pressure sensors) are integrated into a multifunctional module assembly, which is conducive to the rapid integration of the entire thermal control subsystem.

[0019] (2) The present invention arranges each unit (including compensator, main pump, backup pump, automatic control valve, inlet pressure sensor, outlet pressure sensor) in an orderly manner on the installation base plate through integrated design. By adaptively changing the interface of the standard unit, the external thread interface of the standard mechanical pump is changed to a plunger joint for direct assembly with the automatic control valve, saving the adapter parts and achieving integration and lightweight in terms of space and weight.

[0020] (3) The present invention controls the flow direction of the working medium in the fluid circuit by replacing two conventional one-way valves with one automatic control valve, and integrates the automatic control valve and its support into an integrated design, thereby achieving the optimal solution in terms of the number of parts and weight.

[0021] (4) The blower for the filter element and compensator of the present invention is built into the inlet pipe, which will form a component that integrates various transfer functions and integrates its own support, greatly reducing the space required for connection between each single machine and minimizing the number of required transfer pipes, thereby realizing the integration and lightweight design of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a cross-sectional view of the inlet pipe of the present invention.

[0024] Figure 3 It is a schematic diagram of the inlet pipe structure of the present invention.

[0025] Figure 4 It is a cross-sectional view of the automatic control valve of the present invention.

[0026] Figure 5 It is a schematic diagram of the structure of the automatic control valve of the present invention.

[0027] Figure 6 It is a schematic diagram of the installation method of the plunger joint of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] The present invention provides a lightweight integrated component for thermal control of spacecraft, which realizes the miniaturization and lightweight of thermal control components; by integrating the design of each unit in the thermal control system, the problems of large space occupied by the thermal control system and redundant pipelines can be solved. On the basis of integration, the components are further lightweighted to effectively reduce the overall weight, providing strong support for the miniaturization and lightweight design of subsequent thermal control components for spacecraft.

[0030] like Figure 1 As shown, a lightweight integrated component for spacecraft thermal control includes a compensator 1, an inlet pipe 2, a main pump 3, a backup pump 4, a mechanical pump support 5, a mounting base plate 6, an automatic control valve 7, an inlet pressure sensor 8, an outlet pressure sensor 9, a pressure sensor support 10, a compensator support 11, a welding conduit 12 and a filter element 16.

[0031] The compensator 1 is fixed to one side of the mounting base plate 6 through the compensator support 11, and the main pump 3 and the backup pump 4 are fixed to the other side of the mounting base plate 6 through the mechanical pump support 5 respectively; the inlet pressure sensor 8 and the outlet pressure sensor 9 are fixed to the mounting base plate 6 through the pressure sensor support 10 respectively, and are located between the main pump 3 and the backup pump 4; the inlet pipe 2 and the automatic control valve 7 are directly installed on the mounting base plate 6, the filter element 16 is built into the inlet pipe 2 through a threaded connection, and the blower 17 is directly integrated in the interface connecting the inlet pipe 2 and the compensator 1.

[0032] like Figure 2 , 3As shown, the inlet pipe 2 is installed on the mounting base plate 6, and the inlet pipe 2 is provided with a discharge valve interface 15, a component inlet 13, an inlet pressure transmission pipe threaded joint 21, a main pump inlet plunger joint 22, a standby pump inlet threaded joint 23 and a compensator inlet plunger joint 24. The inlet pipe 2 is connected to the inlet threaded joint of the main pump 3 through the main pump inlet plunger joint 22, connected to the inlet threaded joint of the backup pump 4 through the standby pump inlet threaded joint 23 and the welding conduit 12, connected to the inlet pressure sensor 8 through the inlet pressure transmission pipe threaded joint 21 and the welding conduit 12, and connected to the threaded joint of the compensator 1 through the compensator inlet plunger joint 24; the filter element 16 is built in the inlet pipe 2, the blower 17 is integrated in the inlet pipe 2, and the blower channel and the channel for communicating with the compensator 1 are provided in the compensator inlet plunger joint 24;

[0033] like Figure 4 , 5 As shown, the automatic control valve 7 is installed on the mounting base plate 6, and the automatic control valve 7 is connected to the outlet plunger joint of the main pump 3 through the main pump outlet threaded joint 71, connected to the outlet plunger joint of the backup pump 4 through the backup pump outlet threaded joint 72, connected to the outlet pressure sensor 9 through the outlet pressure transmission threaded joint 73 and the welding conduit 12, and the component outlet 14 is provided on the automatic control valve 7. The external pipelines are respectively connected to the component inlet 13 and the component outlet 14 to form the entire fluid circuit, and the working fluid is added to the entire fluid circuit through the filling and discharging valve interface 15.

[0034] The compensator 1 includes a storage tank, a metal bellows and an inflation cut-off valve. The storage tank is a cylindrical metal thin-walled structure, which is equipped with a metal bellows; an air cavity is formed between the metal bellows and the storage tank, and the air cavity is filled with a helium-nitrogen mixture at a certain pressure; the inner cavity of the metal bellows is filled with liquid working fluid; the compensator 1 is connected to the inlet pipe 2, and the liquid level of the compensator is determined by monitoring the inlet pressure sensor 8; the inflation cut-off valve is installed at the top of the compensator storage tank, and is used to fill the air cavity in the compensator with helium and nitrogen. When the air cavity pressure reaches the required value, the cut-off valve is closed to ensure the sealing of the nitrogen.

[0035] The main pump 3 and the backup pump 4 are centrifugal pumps, and their outlets are changed from standard threaded joints to plunger joints, which are directly connected to the threaded joints of the automatic control valve 7.

[0036] The internal valve core 74 of the automatic control valve 7 controls the flow direction of the fluid according to the pressure status of the outlet ends of the main pump 3 and the backup pump 4.

[0037] The filter element 16 and the blower 17 are integrated in the inlet pipe 2. The main function of the blower 17 is to blow away the working medium. The compensator 1 is a large-volume liquid-containing component of a blind cavity, and the working medium is quickly discharged through the blower 17.

[0038] The inlet pipe 2 and the automatic control valve 7 are directly fixed to the mounting base plate 6 by using their own brackets, omitting special supports, and respectively integrating the component inlet 13, the addition and discharge valve interface 15, the component outlet 14 and other interfaces.

[0039] The plunger joints of the outlet and inlet pipes 2 of the main pump 3 and backup pump 4 are machined as a whole, and the outer sleeve nut is inserted into the rear end face of the plunger joint, and a stainless steel ball is used as a filler between the outer sleeve nut and the plunger joint to ensure that the outer sleeve nut rotates normally and does not fall out. The outlet plunger joints of the main pump 3 and the backup pump 4, the main pump inlet plunger joint 22 of the inlet pipe 2, and the compensator inlet plunger joint 24 all include a plunger column 18, a sleeve nut 19 and a stainless steel ball 20. The plunger joint can be directly connected to the threaded joint. The plunger column 18 is used to be inserted into the center hole of the threaded joint. An annular protrusion structure and an annular groove are arranged on the outer wall of the plunger column 18, and an annular groove is arranged on the inner wall of the sleeve nut 19; the sleeve nut 19 is sleeved on the plunger column 18 for threaded connection with the threaded joint; the stainless steel ball 20 is installed between the sleeve nut 19 and the plunger column 18, and is limited by the annular groove on the outer wall of the plunger column 18, the annular protrusion structure and the annular groove on the inner wall of the sleeve nut 19 to ensure that the sleeve nut 19 rotates normally and does not fall out.

[0040] In the present invention, the centrifugal mechanical pump uses a main backup form to drive the flow of the working fluid in the entire circuit, and a redundant backup form is used for the core components to increase the reliability of the entire system. The compensator 1 is used to balance the pressure fluctuations of the fluid circuit caused by temperature changes, and at the same time provide working fluid compensation for the circuit when the circuit leaks; the pressure sensor realizes the function of collecting the inlet and outlet pressures of the mechanical pump, and the filter element 16 is located in the inlet pipe 2 and arranged at the inlet of the mechanical pump, which can realize the filtering function of the working fluid; the automatic control valve 7 can realize the function of prohibiting the reversal of the impeller of the non-working mechanical pump.

[0041] After the ground test is completed, the fluid circuit needs to be blown out. The blower 17 integrated in the inlet pipe 2 can quickly remove the working fluid inside the compensator 1. Inside the component, the working fluid is filtered by the filter element 16 and then fills the entire component. The automatic control valve 7 is directly connected to the outlet of the main pump 3 and the backup pump 4, and the fluid flow direction is switched according to actual needs; the outlet pressure sensor 9 is connected to the automatic control valve 7 through the welding conduit 12, the inlet pressure sensor 8 is connected to the inlet pipe 2 through the welding conduit 12, the backup pump 4 is connected to the inlet pipe 2 through the welding conduit 12, and the main pump 3 is directly connected to the inlet pipe 2.

[0042] The fluid of the thermal control system enters the component through the inlet pipe 2. The fluid is filtered by the filter element 16 before entering the inlet of the main and backup pumps. The main pump 3 and the backup pump 4 select the corresponding pumps to be turned on according to the requirements of the thermal control system. After the fluid is pressurized by the corresponding mechanical pump, the valve core 74 of the automatic control valve 7 is pushed to the outlet of the other mechanical pump, thereby realizing the reverse sealing function of the mechanical pump to prevent the mechanical pump impeller from reversing and causing damage to the mechanical pump.

[0043] The inlet and outlet pressure sensors are arranged between the main and backup pumps by utilizing the space between the main and backup pumps and the pressure sensors, thereby improving the integration of the components.

[0044] According to the difference in the mass of parts in the assembly, the main and backup pumps, the automatic control valve 7 and the inlet and outlet pressure sensors are arranged on the same side, and the compensator 1 is arranged on the other side, so that the geometric center of the assembly is placed in the middle of the installation base plate.

[0045] The compensator 1 is fixed to the mounting base plate 6 through the compensator support 11. The working fluid in the liquid chamber of the compensator 1 can stabilize the pressure of the thermal control fluid circuit where the entire component is located, thereby preventing cavitation damage to the impeller end of the mechanical pump caused by pressure changes.

[0046] The weight of each unit and the stress state under vibration conditions are determined by performing dynamic analysis on the mounting base plate 6 and the support of the assembly, and the hollow position, support thickness and reinforcement rib size of the unit on the mounting base plate 6 are adjusted.

[0047] The inlet pressure sensor 8 and the outlet pressure sensor 9 measure the pressure of the component inlet 13 and the component outlet 14 respectively, and measure the pressure difference between the pump inlet and outlet. The outlet pressure sensor 9 is connected to the automatic control valve 7 through a welding conduit 12, and the inlet pressure sensor 8 is connected to the inlet pipe 2 through a welding conduit 12. The component outlet on the automatic control valve 7 is connected to the external thermal control fluid pipeline.

[0048] The interfaces of the compensator 1, the inlet pipe 2, the main pump 3, the backup pump 4, the automatic control valve 7, the inlet pressure sensor 8, the outlet pressure sensor 9 and the pipeline interface all adopt a double-pass O-ring sealing method to ensure that the entire component has good sealing performance.

[0049] The mounting base plate 6, mechanical pump support 5, compensator support 11 and welding conduit 12 are all made of aluminum alloy material, and are optimized in terms of base plate skin thickness, rib thickness, mounting surface thickness, support form, fixing position and other dimensions to ensure their strength and rigidity while achieving lightweight.

[0050] The tank body and the bottom of the compensator 1 are made of aluminum alloy, and are assembled with a stainless steel bellows through a double-pass O-ring seal, which greatly reduces the weight of the compensator 1 while ensuring its reliability and sealing. At the same time, the liquid level sensor components of the compensator 1 are removed to further reduce the weight of the compensator 1. The imported pressure sensor 8 is used for real-time monitoring to determine the liquid level of the compensator 1.

[0051] The standard outer sleeve nut 19 is inserted into the plunger body 18 from the disconnection point according to the welding process. The welding ends require sufficiently long straight sections, which greatly increases the volume and weight of the assembly. Figure 6 The plunger body 8 is inserted into the direction of the plunger body 8, and then the steel ball 20 is filled between the plunger body 18 and the outer nut 19. Compared with the conventional welded plunger joint, the length direction is reduced by about 40%, and the corresponding weight is reduced. The stainless steel ball 20 is filled between the outer nut and the plunger body to ensure that the outer nut 19 rotates normally and does not fall out. The overall machining process of the plunger joint of the outlet and inlet pipes of the mechanical pump reduces the welds on the basis of lightweight and integration, thereby ensuring assembly accuracy and sealing performance.

[0052] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0053] Parts of the present invention that are not described in detail belong to the well-known technology for those skilled in the art.

Claims

1. A lightweight integrated component for spacecraft thermal control, characterized in that: It comprises a compensator (1), an inlet pipe (2), a main pump (3), a backup pump (4), a mechanical pump support (5), a mounting base plate (6), an automatic control valve (7), an inlet pressure sensor (8), an outlet pressure sensor (9), a pressure sensor support (10), a compensator support (11), a welding conduit (12) and a filter element (16); The compensator (1) is fixed to one side of the mounting base plate (6) via a compensator support (11), and the main pump (3) and the backup pump (4) are respectively fixed to the other side of the mounting base plate (6) via a mechanical pump support (5); the inlet pressure sensor (8) and the outlet pressure sensor (9) are respectively fixed to the mounting base plate (6) via a pressure sensor support (10), and are located between the main pump (3) and the backup pump (4); The inlet pipe (2) is mounted on the mounting base plate (6), the filter element (16) is built into the inlet pipe (2), the blower (17) is integrated in the interface connecting the inlet pipe (2) and the compensator (1), and the inlet pipe (2) is provided with a discharge valve interface (15) and a component inlet (13); the inlet pipe (2) is connected to the compensator (1) through the interface integrated with the blower (17), the inlet pipe (2) is connected to the inlet of the main pump (3), and is connected to the inlet of the backup pump (4) through the welding conduit (12), and is connected to the inlet pressure sensor (8) through the welding conduit (12); The automatic control valve (7) is mounted on the mounting base plate (6). The automatic control valve (7) is respectively connected to the outlet of the main pump (3) and the outlet of the backup pump (4), and is connected to the outlet pressure sensor (9) through a welding conduit (12). The automatic control valve (7) is provided with a component outlet (14); external pipelines are respectively connected to the component inlet (13) and the component outlet (14) to form a fluid circuit, and the fluid circuit is filled with working fluid through the filling and discharging valve interface (15).

2. A lightweight integrated component for spacecraft thermal control according to claim 1, characterized in that: The compensator (1) is used to balance the pressure fluctuation of the fluid circuit caused by temperature change, and at the same time provide working medium compensation for the circuit when the circuit leaks; the compensator (1) comprises a storage tank, a metal bellows and an air-filling cut-off valve, the storage tank is a cylindrical metal thin-walled structure, and the metal bellows is installed inside; an air cavity is formed between the metal bellows and the storage tank, and the air cavity is filled with a helium-nitrogen mixed gas; the inner cavity of the metal bellows is filled with liquid working medium; the air-filling cut-off valve is installed at the top of the compensator storage tank, and is used to fill the air cavity in the compensator with helium and nitrogen. When the air cavity pressure reaches a required value, the cut-off valve is closed to ensure the sealing of nitrogen; the compensator (1) is arranged at the inlet (13) of the component, and the liquid level of the compensator (1) is judged by monitoring the inlet pressure sensor (8).

3. A lightweight integrated component for spacecraft thermal control according to claim 1, characterized in that: The inlet pipe (2) is also provided with an inlet pressure transmission pipe threaded joint (21), a main pump inlet plunger joint (22), a standby pump inlet threaded joint (23) and a compensator inlet plunger joint (24); the inlet pipe (2) is connected to the inlet threaded joint of the main pump (3) through the main pump inlet plunger joint (22); the inlet pipe (2) is connected to the inlet threaded joint of the backup pump (4) through the standby pump inlet threaded joint (23) and the welding conduit (12); the inlet pipe (2) is connected to the inlet pressure sensor (8) through the inlet pressure transmission pipe threaded joint (21) and the welding conduit (12); the inlet pipe (2) is connected to the threaded joint of the compensator (1) through the compensator inlet plunger joint (24); a blower channel and a channel for communicating with the compensator (1) are provided in the compensator inlet plunger joint (24).

4. A lightweight integrated component for spacecraft thermal control according to claim 3, characterized in that: The main pump (3) and the backup pump (4) are centrifugal pumps, and the outlets of the main pump (3) and the backup pump (4) are plunger joints, which are directly connected to the threaded joints of the automatic control valve (7) respectively.

5. A lightweight integrated component for spacecraft thermal control according to claim 4, characterized in that: The automatic control valve (7) is connected to the outlet plunger joint of the main pump (3) through the main pump outlet threaded joint (71), is connected to the outlet plunger joint of the backup pump (4) through the backup pump outlet threaded joint (72), and is connected to the outlet pressure sensor (9) through the outlet pressure transmission pipe threaded joint (73) and the welding conduit (12).

6. A lightweight integrated component for spacecraft thermal control according to claim 5, characterized in that: The internal valve core (74) of the automatic control valve (7) controls the flow direction of the fluid according to the pressure state of the outlet ends of the main pump (3) and the backup pump (4).

7. A lightweight integrated component for spacecraft thermal control according to claim 5, characterized in that: The outlet plunger joints of the main pump (3) and the backup pump (4) and the main pump inlet plunger joint (22) and the compensator inlet plunger joint (24) of the inlet pipe (2) all include a plunger column (18), a sleeve nut (19) and a stainless steel ball (20). The plunger joint can be directly connected to the threaded joint. The plunger column (18) is used to be inserted into the center hole of the threaded joint. An annular protrusion structure and an annular groove are arranged on the outer wall of the plunger column (18), and an annular groove is arranged on the inner wall of the sleeve nut (19); the sleeve nut (19) is sleeved on the plunger column (18) and is used for threaded connection with the threaded joint; the stainless steel ball (20) is installed between the sleeve nut (19) and the plunger column (18), and is limited by the annular groove on the outer wall of the plunger column (18), the annular protrusion structure and the annular groove on the inner wall of the sleeve nut (19), so as to ensure that the sleeve nut (19) rotates normally and does not fall out.

8. The lightweight integrated component for spacecraft thermal control according to claim 1, characterized in that: The inlet pressure sensor (8) and the outlet pressure sensor (9) respectively measure the pressure of the component inlet (13) and the component outlet (14) to obtain the pressure difference between the inlet and the outlet.

9. The lightweight integrated component for spacecraft thermal control according to claim 1, characterized in that: By adjusting the installation positions of the compensator (1), the main pump (3), the backup pump (4), the automatic control valve (7), the inlet pressure sensor (8), and the outlet pressure sensor (9), the geometric center of the thermal control integrated assembly is placed in the middle of the installation base plate (6).

10. A lightweight integrated component for spacecraft thermal control according to any one of claims 1 to 9, characterized in that: A fluid medium for thermal control of a spacecraft enters an inlet pipe (2) through a component inlet (13), and enters the inlet ends of a main pump (3) and a backup pump (4) after being filtered by a filter element (16); the main pump (3) and the backup pump (4) select corresponding pumps to be opened according to thermal control requirements, and after being pressurized by the corresponding pump, the fluid medium pushes a valve core (74) of an automatic control valve (7) toward the outlet end of another pump, thereby realizing a reverse sealing function for the pump and preventing the pump impeller from reversing.

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