Cross-synchronous pressurization air supply system for spacecraft and its usage

Abstract

This invention provides a cross-synchronous pressurization gas supply system and its usage method for spacecraft, relating to the field of space propulsion technology. The system includes a cross-synchronous pressurization gas supply system, through which the propellant tank is synchronously pressurized. The system comprises gas cylinders, a main system, and a secondary system, with parallel gas cylinders providing cross-synchronous pressurization to the propellant tank via either the main or secondary system. This invention achieves synchronous pressurization of the propellant tank through the cross-synchronous pressurization gas supply system, and controls the connection and disconnection between gas cylinders via a fifth solenoid valve. For spacecraft with high requirements for pressurization synchronization, such as propulsion systems using common-bottom propellant tanks, this system effectively avoids the problem of pressure differential exceeding limits and common-bottom rupture caused by asynchronous pressurization of the oxygen and fuel components in the propellant tank. The redundant backup design fully ensures the reliability of the propellant tank pressurization.

Description

Technical Field

[0001] This invention relates to the field of space propulsion technology, and more specifically, to a cross-synchronous pressurization air supply system and its usage method applied to spacecraft. Background Technology

[0002] For spacecraft with high requirements for pressurization synchronization and reliability, such as propulsion systems using common-bottom tanks, the reliable and safe control of the pressure differential in the common-bottom section of the common-bottom tank is a key issue in ensuring spacecraft safety. For propulsion systems that use a squeeze-type operation, the operating pressure of the tank is often relatively high. At the same time, to accommodate the weight of the tank, the design pressure differential in the common-bottom section of the common-bottom tank is generally lower than the design pressure of the shell. This leads to a higher risk associated with the use of common-bottom tanks in spacecraft. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a cross-synchronous pressurization air supply system and its usage method for use in spacecraft.

[0004] According to the present invention, a cross-synchronous pressurization air supply system for a spacecraft includes a cross-synchronous pressurization air supply system, wherein the tank is synchronously pressurized through the cross-synchronous pressurization air supply system;

[0005] The cross-synchronous pressurization gas supply system includes gas cylinders, a main system, and a secondary system. The parallel gas cylinders provide cross-synchronous pressurization to the storage tank through either the main system or the secondary system.

[0006] Preferably, the gas cylinder includes a first gas cylinder and a second gas cylinder, and the first gas cylinder and the second gas cylinder are connected in parallel through a fifth solenoid valve;

[0007] The first and second gas cylinders respectively use the main or auxiliary pipeline system to cross-synchronously pressurize the storage tank.

[0008] Preferably, the first gas cylinder is connected to the first inflation valve, and the first gas cylinder is pressurized through the first inflation valve; the second gas cylinder is connected to the second inflation valve, and the second gas cylinder is pressurized through the second inflation valve.

[0009] Preferably, the main circuit system includes a first electric explosion isolation valve, a first solenoid valve, a first circuit, and a second circuit. The first electric explosion isolation valve is connected to the first solenoid valve, the first solenoid valve is connected to the first circuit and the second circuit respectively, and the first circuit and the second circuit are cross-connected to the storage tank.

[0010] Preferably, the first circuit includes a first pressure reducer and a first check valve, the first pressure reducer being connected to the first check valve; the second circuit includes a second pressure reducer and a second check valve, the second pressure reducer being connected to the second check valve.

[0011] The first solenoid valve is connected to the first pressure reducer and the second pressure reducer respectively, and the first check valve and the second check valve are cross-connected to the storage tank respectively.

[0012] Preferably, the secondary circuit system includes a second electric explosion isolation valve, a second solenoid valve, a third circuit, and a fourth circuit. The second electric explosion isolation valve is connected to the second solenoid valve, and the second solenoid valve is connected to the third circuit and the fourth circuit respectively. The third circuit and the fourth circuit are cross-connected to the storage tank.

[0013] Preferably, the third line includes a third pressure reducer and a third check valve, the third pressure reducer being connected to the third check valve; the fourth line includes a fourth pressure reducer and a fourth check valve, the fourth pressure reducer being connected to the fourth check valve.

[0014] The second solenoid valve is connected to the third and fourth pressure regulators respectively, and the third and fourth check valves are cross-connected to the storage tank respectively.

[0015] Preferably, both the first and second gas cylinders have full redundancy capability;

[0016] When the first gas cylinder fails, close the fifth solenoid valve and use the second gas cylinder to perform cross-synchronous pressurization of the storage tank.

[0017] Alternatively, if the second gas cylinder malfunctions, the fifth solenoid valve can be closed, and the first gas cylinder can be used to cross-synchronize pressurization of the storage tank.

[0018] Preferably, one end of the storage tank is connected to the first line and the third line respectively, and the other end of the storage tank is connected to the second line and the fourth line respectively.

[0019] This invention also provides a method for using a cross-synchronous pressurization air supply system in a spacecraft, the specific operation steps of which are as follows:

[0020] S1. The first inflation valve pressurizes and inflates the first gas cylinder, and the second inflation valve pressurizes and inflates the second gas cylinder.

[0021] S2. Adjust the first, third, second, and fourth pressure reducers respectively to ensure that the output pressure of the first, third, second, and fourth pressure reducers always has a stable pressure difference.

[0022] S3. Under normal circumstances, the fifth solenoid valve is opened, and the first and second gas cylinders are connected to the main system respectively. The first and second routes in the main system cross-supply the storage tank to achieve simultaneous pressurization of the oxygen and fuel components in the storage tank.

[0023] S4. When the first or second pressure reducer in the main system experiences overpressure or underpressure or other abnormalities, the first solenoid valve can be closed, and the first and second gas cylinders can be switched to the auxiliary system for use. The third and fourth routes can then cross-synchronously pressurize the storage tank.

[0024] S5. When the first or second gas cylinder fails, close the fifth solenoid valve and use the second or first gas cylinder alone to perform cross-synchronous pressurization of the storage tank.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention achieves synchronous pressurization of the storage tank through a cross-synchronous pressurization gas supply system, and effectively avoids the safety problem of excessive pressure difference caused by asynchronous pressurization of the oxygen and fuel components in the storage tank by controlling the on / off of the gas cylinders through a fifth solenoid valve; it adopts a redundant backup design to fully ensure the reliability of the storage tank pressurization. Attached Figure Description

[0027] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the cross-synchronous pressurization air supply system for spacecraft proposed in this invention. Detailed Implementation

[0029] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0030] Example 1

[0031] According to the present invention, a cross-synchronous pressurization air supply system for spacecraft is provided, such as... Figure 1 As shown, a cross-synchronous pressurization gas supply system is included, through which the storage tank is synchronously pressurized. The cross-synchronous pressurization gas supply system includes gas cylinders, a main system, and a secondary system. The parallel gas cylinders provide cross-synchronous pressurization to the storage tank via either the main system or the secondary system. The gas cylinders include a first gas cylinder and a second gas cylinder, connected in parallel via a fifth solenoid valve. The first gas cylinder is connected to a first filling valve and pressurized through it; the second gas cylinder is connected to a second filling valve and pressurized through it. Both the first and second gas cylinders have full redundancy. When the first gas cylinder fails, the fifth solenoid valve is closed, and the second gas cylinder is used for cross-synchronous pressurization of the storage tank; or, when the second gas cylinder fails, the fifth solenoid valve is closed, and the first gas cylinder is used for cross-synchronous pressurization of the storage tank. In other words, the first gas cylinder and / or the second gas cylinder can provide cross-synchronous pressurization to the storage tank via either the main system or the secondary system.

[0032] The main circuit system includes a first electrically explosive isolation valve, a first solenoid valve, a first circuit, and a second circuit. The first electrically explosive isolation valve is connected to the first solenoid valve, which is connected to both the first and second circuits. The first and second circuits are cross-connected to the storage tank. The first circuit includes a first pressure reducer and a first check valve, which is connected to the first check valve. The second circuit includes a second pressure reducer and a second check valve, which is connected to the second check valve. The first solenoid valve is connected to both the first and second pressure reducers, and the first and second check valves are cross-connected to the storage tank. The auxiliary circuit system includes a second electrically explosive isolation valve, a second solenoid valve, a third circuit, and a fourth circuit. The second electrically explosive isolation valve is connected to the second solenoid valve, which is connected to both the third and fourth circuits. The third and fourth circuits are cross-connected to the storage tank. The third circuit includes a third pressure reducer and a third check valve, which is connected to the third check valve. The fourth circuit includes a fourth pressure reducer and a fourth check valve, which is connected to the fourth check valve. The second solenoid valve is connected to both the third and fourth pressure reducers, and the third and fourth check valves are cross-connected to the storage tank. One end of the storage tank is connected to the first line and the third line respectively, and the other end of the storage tank is connected to the second line and the fourth line respectively.

[0033] More specifically, the gas cylinders, main pipeline system, and auxiliary pipeline system form a cross-synchronous pressurization gas supply system. This system can simultaneously pressurize the oxygen and fuel components in the storage tank. The pressurization branches of the oxygen and fuel components are controlled by the same solenoid valve, effectively preventing safety issues such as excessive pressure differential caused by asynchronous pressurization of the oxygen and fuel components in the storage tank. The cross-synchronous pressurization gas supply system adopts a redundant backup design, which can fully guarantee the reliability of the storage tank pressurization.

[0034] The propulsion system is designed for constant pressure compression. During operation, the system's storage tanks face several challenges: the stability of the pressure difference between the oxygen and fuel components, and the synchronicity of pressurization. The stability of the tank pressure difference is ensured by pressure reducers. The output pressures of the oxygen-fuel pressure reducers are individually adjusted to maintain a stable pressure difference between them. Synchronicity of pressurization is ensured by a cross-supply oxygen-fuel circuit design, where all oxygen and fuel tank components are supplied with pressurized gas through the same high-pressure circuit. During system operation, the oxygen-fuel cylinders are connected in parallel via a single high-pressure valve (the fifth solenoid valve). Each cylinder is supplied downstream in a cross-supply manner, enabling simultaneous pressurization of the oxygen-fuel tank components. Under normal circumstances, the high-pressure valves between the cylinders are open, and the two cylinders, connected in parallel, synchronously pressurize the oxygen-fuel components in the storage tanks via the main circuit. When the main circuit pressure reducer experiences overpressure or underpressure, the entire pressurization circuit is switched to the secondary circuit. In case of failure, the propulsion system is designed with a redundant backup scheme for gas cylinders. The gas volume of the two gas cylinders has full redundancy capability, that is, if either gas cylinder is normal, it can achieve full mission operation. If a gas cylinder leaks, the high-pressure valve between the gas cylinders can be closed to isolate the leaking gas cylinder, and the downstream work can be supplied through a single gas cylinder.

[0035] Example 2

[0036] The present invention also provides a method for using the cross-synchronous pressurization air supply system of a spacecraft as described in Embodiment 1, the specific operation steps of which are as follows:

[0037] S1. The first inflation valve pressurizes and inflates the first gas cylinder, and the second inflation valve pressurizes and inflates the second gas cylinder.

[0038] S2. Adjust the first, third, second, and fourth pressure reducers respectively to ensure that the output pressure of the first, third, second, and fourth pressure reducers always has a stable pressure difference.

[0039] S3. Under normal circumstances, when the fifth solenoid valve is opened, the first gas cylinder and the second gas cylinder are connected to the main system respectively. The first line and the second line in the main system cross-supply the storage tank to achieve simultaneous pressurization of the oxygen and fuel components in the storage tank.

[0040] S4. When the first or second pressure reducer in the main system experiences overpressure or underpressure, the first and second gas cylinders are switched to the auxiliary system for use, and the third and fourth lines cross-synchronously pressurize the storage tank.

[0041] S5. When the first or second gas cylinder fails, close the fifth solenoid valve and use the second or first gas cylinder alone to perform cross-synchronous pressurization of the storage tank.

[0042] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0043] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A cross-synchronous pressurization air supply system for spacecraft, characterized in that, It includes a cross-synchronous pressurization gas supply system, which includes gas cylinders, a main system and a secondary system. The parallel gas cylinders are cross-synchronous pressurized through the main system or the secondary system respectively. The gas cylinder includes a first gas cylinder and a second gas cylinder, and the first gas cylinder and the second gas cylinder are connected in parallel through a fifth solenoid valve; The first gas cylinder and the second gas cylinder are respectively cross-synchronously pressurized through the main road system or the auxiliary road system; The main road system includes a first electric explosion isolation valve, a first solenoid valve, a first line, and a second line. The first electric explosion isolation valve is connected to the first solenoid valve, and the first solenoid valve is connected to the first line and the second line respectively. The first line and the second line are cross-connected to the storage tank. The first line includes a first pressure reducer and a first check valve, the first pressure reducer being connected to the first check valve; the second line includes a second pressure reducer and a second check valve, the second pressure reducer being connected to the second check valve. The first solenoid valve is connected to the first pressure reducer and the second pressure reducer respectively, and the first check valve and the second check valve are cross-connected to the storage tank respectively.

2. The cross-synchronous pressurization air supply system for spacecraft according to claim 1, characterized in that, The first gas cylinder is connected to a first inflation valve, and the first gas cylinder is pressurized through the first inflation valve; the second gas cylinder is connected to a second inflation valve, and the second gas cylinder is pressurized through the second inflation valve.

3. The cross-synchronous pressurization air supply system for spacecraft according to claim 1, characterized in that, The secondary circuit system includes a second electric explosion isolation valve, a second solenoid valve, a third circuit, and a fourth circuit. The second electric explosion isolation valve is connected to the second solenoid valve, and the second solenoid valve is connected to the third circuit and the fourth circuit respectively. The third circuit and the fourth circuit are cross-connected to the storage tank.

4. The cross-synchronous pressurization air supply system for spacecraft according to claim 3, characterized in that, The third line includes a third pressure reducer and a third check valve, the third pressure reducer being connected to the third check valve; the fourth line includes a fourth pressure reducer and a fourth check valve, the fourth pressure reducer being connected to the fourth check valve. The second solenoid valve is connected to the third pressure reducer and the fourth pressure reducer respectively, and the third check valve and the fourth check valve are cross-connected to the storage tank respectively.

5. The cross-synchronous pressurization air supply system for spacecraft according to claim 1, characterized in that, Both the first gas cylinder and the second gas cylinder have full redundancy capability; When the first gas cylinder fails, the fifth solenoid valve is closed, and the second gas cylinder is used to cross-synchronize pressurize the storage tank. Alternatively, when the second gas cylinder malfunctions, the fifth solenoid valve is closed, and the first gas cylinder is used to perform cross-synchronous pressurization of the storage tank.

6. The cross-synchronous pressurization air supply system for spacecraft according to claim 4, characterized in that, One end of the storage tank is connected to the first line and the third line, and the other end of the storage tank is connected to the second line and the fourth line.

7. A method of using the cross-synchronous pressurization air supply system for a spacecraft as described in any one of claims 1-6, characterized in that, The specific operating steps are as follows: S1. The first inflation valve pressurizes and inflates the first gas cylinder, and the second inflation valve pressurizes and inflates the second gas cylinder. S2. Adjust the first pressure reducer, the third pressure reducer, the second pressure reducer, and the fourth pressure reducer respectively to ensure that the output pressure of the first pressure reducer, the third pressure reducer, the second pressure reducer, and the fourth pressure reducer always has a stable pressure difference; S3. Under normal circumstances, the fifth solenoid valve is opened, and the first gas cylinder and the second gas cylinder are connected to the main system respectively. The first line and the second line in the main system cross-supply the storage tank to achieve simultaneous pressurization of the oxygen and fuel components in the storage tank. S4. When the first or second pressure reducer in the main system experiences overpressure or underpressure, the first and second gas cylinders are switched to the auxiliary system for use, and the third and fourth lines perform cross-synchronous pressurization of the storage tank. S5. When the first gas cylinder or the second gas cylinder fails, close the fifth solenoid valve and use the second gas cylinder or the first gas cylinder alone to perform cross-synchronous pressurization of the storage tank.

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