Pure oxygen test device and test method for space suit circulating pump

Abstract

According to the pure oxygen testing device and method for the space suit circulating pump, the testing device has the functions of simulating the pure oxygen environment, conducting medium filling and circulating and the like, and the actual working state of the circulating pump in a space suit can be fully simulated. The pure oxygen test device comprises a pure oxygen test main body device, a medium supply device, a high-pressure nitrogen supply device, an oxygen supply device, a vacuumizing device and a pump control device, a circulating pump in the pure oxygen test main body device is connected with a pump control device; the circulating pump is connected with a medium supply device through a filter and a medium return valve; the medium supply device is connected with the high-pressure nitrogen supply device through a nitrogen supply valve and a high-pressure nitrogen pressure reducing valve; the pure oxygen test main body device is connected with a vacuumizing device through a test box ventilation nozzle and a vacuumizing hand valve; and the pure oxygen test main body device is connected with the oxygen supply device through the other test box body ventilation nozzle, the oxygen supply hand valve and the oxygen pressure reducing valve.

Description

Technical Field

[0001] This invention belongs to the field of environmental testing of temperature-controlled pumps for spacesuits, specifically relating to a pure oxygen testing device and method for a circulating pump in a spacesuit. Background Technology

[0002] When humans leave Earth and enter outer space, spacesuits are essential equipment. To protect the lives of astronauts, spacesuits need to have environmental control and life support systems. The spacesuit circulation pump (hereinafter referred to as the circulation pump) is a key component of this system, used to drive the circulation of the cooling medium inside the spacesuit to maintain a relatively stable temperature. The circulation pump operates in a special environment, in a pure oxygen environment with an oxygen concentration of over 98%. To verify whether the circulation pump can operate safely in a pure oxygen environment, it is necessary to conduct pure oxygen environment tests on the ground to prevent the circulation pump from carrying any potential hazards into space. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: the present invention provides a pure oxygen test device and test method for a spacesuit circulating pump. The test device has functions such as simulating a pure oxygen environment, performing medium injection, and circulation, and can fully simulate the actual working state of the circulating pump in the spacesuit. The technical solution adopted in this invention is: a pure oxygen testing device for a spacesuit circulating pump, comprising a pure oxygen testing main device, a medium supply device, a high-pressure nitrogen supply device, an oxygen supply device, a vacuum device, and a pump control device. The circulating pump and pump control device in the main device of the pure oxygen test are connected; the circulating pump is connected to the medium supply device through a filter and a medium return valve; the medium supply device is connected to the nitrogen supply valve, the high-pressure nitrogen pressure reducing valve and the high-pressure nitrogen supply device; the main device of the pure oxygen test is connected to the test chamber vent, the vacuum valve and the vacuum device; the main device of the pure oxygen test is connected to another test chamber vent, the oxygen supply valve, the oxygen pressure reducing valve and the oxygen supply device.

[0004] Furthermore, the main device for the pure oxygen test includes a pure oxygen test chamber, a test chamber mounting window cover, and a test chamber cover; a first sealing groove is opened at one end of the pure oxygen test chamber, and the test chamber cover is installed on the port of the pure oxygen test chamber and sealed by the sealing ring in the first sealing groove; two test chamber vents are provided on the other end face of the pure oxygen test chamber.

[0005] Furthermore, the circulating pump is placed inside the pure oxygen test chamber.

[0006] Furthermore, one end of the internal cable of the pure oxygen test chamber is connected to the electrical connector of the circulating pump, and the other end is connected to the window cover of the pure oxygen test chamber; one end of the external cable is connected to the window cover of the pure oxygen test chamber, and the other end is connected to the pump control device.

[0007] Furthermore, within the pure oxygen test chamber, there are two internal metal hoses. One internal metal hose is connected at one end to the inlet of the circulation pump and at the other end to the test chamber's mounting window cover. The other internal metal hose is connected at one end to the outlet of the circulation pump and at the other end to the test chamber's mounting window cover. There are also two external metal hoses. One external metal hose is connected at one end to the test chamber's mounting window cover and at the other end to the filter's outlet, with the filter's inlet connected to the media supply chamber. The other external metal hose is connected at one end to the test chamber's mounting window cover and at the other end to the media return valve.

[0008] Furthermore, several test chamber mounting windows are symmetrically arranged on both sides of the pure oxygen test chamber; each test chamber mounting window port has a second sealing groove, and the test chamber mounting window cover is installed at the test chamber mounting window port and sealed by the sealing ring in the second sealing groove.

[0009] The medium supply device is equipped with a medium filling valve and a medium discharge valve.

[0010] A test method for a pure oxygen test apparatus for a spacesuit circulating pump includes: Open the medium filling valve to supply medium into the tank with a volume of / ~ / , then close the medium filling valve; Adjust the high-pressure nitrogen pressure reducing valve to adjust the high-pressure nitrogen pressure to the set pressure a, open the nitrogen supply valve to fill the medium supply tank in the medium supply device with nitrogen, so that the pressure inside the medium supply tank is maintained at the set pressure a, and then close the nitrogen supply valve and the high-pressure nitrogen pressure reducing valve in sequence. The circulating pump is started by the pump control device, and the circulating pump drives the medium to circulate; the test chamber cover is installed on the pure oxygen test chamber to seal the pure oxygen test chamber. Open the vacuum valve, start the vacuum device, and pump the pressure inside the pure oxygen test chamber to the set pressure b. Then close the vacuum valve and shut off the vacuum device. Start the oxygen supply device, adjust the oxygen pressure reducing valve to the set pressure c, open the oxygen supply manual valve to fill the pure oxygen test chamber with oxygen, and when the oxygen pressure in the pure oxygen test chamber reaches the set value, close the oxygen supply manual valve and shut off the oxygen supply device to provide the pure oxygen environment required for the pure oxygen test.

[0011] Furthermore, the method of use also includes: After the test is completed, the circulating pump is turned off through the pump control device to restore the pure oxygen test chamber to normal pressure; the medium discharge valve is opened to release the medium.

[0012] The advantages of this invention compared to the prior art are: (1) The present invention provides a simulation system for pure oxygen test, which can simulate the actual working environment and working state of the circulating pump in the spacesuit.

[0013] (2) The present invention utilizes a medium supply device, a high-pressure nitrogen system and several accessories to ensure that the inlet pressure of the circulating pump meets the requirements and to prevent cavitation during the operation of the circulating pump.

[0014] (3) By developing a universal and expandable test chamber mounting window, the present invention can realize the functions of connecting cables inside and outside the chamber and connecting metal hoses for medium flow, and realize the functions of sealing, observation and expansion. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pure oxygen environment testing device provided by the present invention.

[0016] Figure 2 This is a schematic diagram of the main structure of the pure oxygen test device provided by the present invention (without the test chamber cover).

[0017] Figure 3 A schematic diagram of the main structure of the pure oxygen test device provided by the present invention (with the test chamber cover door installed).

[0018] Figure 4 This is a structural diagram of the test chamber mounting window provided by the present invention.

[0019] The diagram shows: 1. Pure oxygen test main unit; 11. Pure oxygen test chamber; 111. Test chamber mounting window; 112. Test chamber mounting window cover; 113. Test chamber cover; 114. Test chamber vent; 115. Test chamber main door sealing groove; 116. Test chamber mounting window sealing groove; 12. Internal metal hose; 13. Internal cable; 14. Oxygen supply manual valve; 15. Oxygen pressure reducing valve; 16. Vacuum manual valve; 17. External metal hose; 18. External cable; 2. Medium supply device; 21. Medium supply chamber; 22. Medium discharge valve; 23. Medium filling valve; 24. Nitrogen supply valve; 25. Medium reflux valve; 3. High-pressure nitrogen supply device; 31. High-pressure nitrogen pressure reducing valve; 4. Oxygen supply device; 5. Vacuum device; 6. Pump control device; 7. Circulating pump; 8. Filter. Detailed Implementation

[0020] The present invention will be described in conjunction with the accompanying drawings.

[0021] The directional terms used in this article, such as left, right, above, below, horizontal, and vertical, refer to the direction of the images in the text. They are used for ease of description only and do not limit the actual objects.

[0022] This invention provides a pure oxygen environment testing device and method for a spacesuit circulating pump to simulate the actual working environment of the circulating pump in a spacesuit.

[0023] like Figure 1 A pure oxygen testing device for a spacesuit circulating pump mainly comprises a pure oxygen testing main unit 1, a medium supply device 2, a high-pressure nitrogen supply device 3, an oxygen supply device 4, a vacuum device 5, and a pump control device 6. The circulating pump 7 in the pure oxygen testing main unit 1 is connected to the pump control device 6 via an internal cable 13, an external cable 18, and an internal metal hose 12, an external metal hose 17, a filter 8, and a medium return valve 25. The medium supply device 2 is connected to the high-pressure nitrogen supply device 3 via a nitrogen supply valve 24, a hose, a high-pressure nitrogen pressure reducing valve 31. The pure oxygen testing main unit 1 is connected to the vacuum device 5 via a test chamber vent 114, a hose, a vacuum hand valve 16, and another test chamber vent 114, a hose, an oxygen supply hand valve 14, an oxygen pressure reducing valve 15, and an oxygen supply device 4.

[0024] like Figure 1 The circulating pump 7 is placed inside the pure oxygen test chamber 11. An internal cable 13 connects one end to the electrical connector of the circulating pump 7 and the other end to the test chamber mounting window 112. An external cable 18 connects one end to the test chamber mounting window 112 and the other end to the pump control device 6. Two internal metal hoses 12 are connected as follows: one end of one hose is connected to the inlet of the circulating pump 7 and the other end to the test chamber mounting window 112; the other end is connected to the outlet of the circulating pump 7 and the other end to the test chamber mounting window 112. Two external metal hoses 17 are connected as follows: one end of one hose is connected to the test chamber mounting window 112 and the other end is connected to the outlet (left side) of the filter, while the inlet (right side) of the filter 8 is connected to the media supply chamber 21. The other hose connects one end of one hose to the test chamber mounting window 112 and the other end to the media return valve 25. The outlet of the media return valve 25 is connected to the media supply chamber 21.

[0025] like Figures 2-3The main device 1 for the pure oxygen test mainly consists of a pure oxygen test chamber 11, a test chamber mounting window / cover door 112, and a test chamber cover door 113. The pure oxygen test chamber 11 has a first sealing groove 115 and several circumferentially arranged threaded holes. The test chamber cover door 113 can be installed on the pure oxygen test chamber 11, fixed through the threaded holes, and sealed by the sealing ring in the first sealing groove 115. The pure oxygen test chamber 11 is equipped with two test chamber vents 114, which are used to connect the vacuum device 5 and the oxygen supply device 4.

[0026] In addition, the pure oxygen test chamber 11 is equipped with four test chamber mounting windows 111. Each of the four test chamber mounting windows 111 has a second sealing groove 116 and several circumferentially arranged bolt holes (such as...). Figure 4 The test chamber mounting window cover 112 can be installed on the test chamber mounting window 111 through bolt holes and sealed by the sealing ring in the second sealing groove 116. The test chamber mounting window cover 112 can be designed with different structural forms and functions as needed. It can be used as a junction between the metal flexible hose 12 inside the chamber and the metal flexible hose 17 outside the chamber; it can be used as a junction between the cable 13 inside the chamber and the cable 18 outside the chamber; it can be used as a glass observation window to observe the operating status of the circulating pump 7 during the test; it can also be used as a backup window to achieve versatility and expandability.

[0027] Working principle: The circulating pump 7 is placed inside the pure oxygen test chamber 11. An internal cable 13 is connected at one end to the electrical connector of the circulating pump 7 and at the other end to the test chamber mounting window 112. An external cable 18 is connected at one end to the test chamber mounting window 112 and at the other end to the pump control device 6. Two internal metal hoses 12 are connected as follows: one end of one hose is connected to the inlet of the circulating pump 7 and at the test chamber mounting window 112; the other end is connected to the outlet of the circulating pump 7 and at the test chamber mounting window 112. Two external metal hoses 17 are connected as follows: one end of one hose is connected to the test chamber mounting window 112 and at the other end to the filter outlet (left side), while the filter inlet (right side) is connected to the media supply chamber 21. The other hose is connected at one end to the test chamber mounting window 112 and at the other end to the media return valve 25. The outlet of the media return valve 25 is connected to the media supply chamber 21. At this point, the medium forms a circulation path from the medium supply tank 21 to the filter 8, the circulation pump 7, the medium return valve 25, and back to the medium supply tank 21.

[0028] Open the medium filling valve 23 to fill the medium supply tank 21 with 1 / 2 to 2 / 3 of its volume of medium, then close the medium filling valve 23. Adjust the high-pressure nitrogen pressure reducing valve 31 to bring the high-pressure nitrogen pressure to approximately 0.15 MPa. Open the nitrogen supply valve 24 to fill the medium supply tank 21 in the medium supply device 2 with nitrogen, maintaining the pressure inside the medium supply tank 21 at approximately 0.15 MPa. Then, close the nitrogen supply valve 24 and the high-pressure nitrogen pressure reducing valve 31 in sequence. Maintaining the pressure in the medium supply tank 21 at 0.15 MPa ensures that the inlet pressure of the circulating pump 7 meets the requirements and prevents cavitation during operation.

[0029] The circulating pump 7 is started by the pump control device 6, and the circulating pump 7 drives the medium to circulate. After the circulating pump 7 is debugged and all its indicators are normal, the test chamber cover 113 is installed on the pure oxygen test chamber 11 to achieve complete sealing inside the pure oxygen test chamber 11.

[0030] Open the vacuum valve 16 and start the vacuum device 5 to evacuate the pressure inside the pure oxygen test chamber 11 to 1×10⁻⁶. -3 Below 0.2 MPa, close the vacuum valve 16 and the vacuum device 5. Start the oxygen supply device 4, adjust the oxygen pressure reducing valve 15 to approximately 0.2 MPa, open the oxygen supply valve 14 to fill the pure oxygen test chamber 11 with oxygen. When the oxygen pressure inside the pure oxygen test chamber 11 reaches the set value, close the oxygen supply valve 14 and the oxygen supply device 4. At this point, the pure oxygen test chamber 11 provides the pure oxygen environment required for the test.

[0031] After the test is completed, the circulating pump is shut off via pump control device 6 to restore the pure oxygen test chamber 11 to normal pressure. The medium discharge valve 22 is opened to release the medium, and all systems are disassembled. The test is now complete.

[0032] The parts of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A pure oxygen testing device for a spacesuit circulating pump, characterized in that, It includes a pure oxygen test main device (1), a medium supply device (2), a high-pressure nitrogen supply device (3), an oxygen supply device (4), a vacuum device (5), and a pump control device (6). The circulating pump (7) and the pump control device (6) in the main device (1) of pure oxygen test are connected; the circulating pump (7) is connected to the medium supply device (2) through the filter (8) and the medium return valve (25); the medium supply device (2) is connected to the nitrogen supply valve (24), the high-pressure nitrogen pressure reducing valve (31) and the high-pressure nitrogen supply device (3); the main device (1) of pure oxygen test is connected to the test chamber vent (114), the vacuum hand valve (16) and the vacuum device (5); the main device (1) of pure oxygen test is connected to another test chamber vent (114), the oxygen supply hand valve (14), the oxygen pressure reducing valve (15) and the oxygen supply device (4).

2. The pure oxygen testing device for a spacesuit circulating pump according to claim 1, characterized in that, The pure oxygen test main device (1) includes a pure oxygen test chamber (11), a test chamber mounting window cover (112) and a test chamber cover (113); a first sealing groove (115) is opened at one end of the pure oxygen test chamber (11), and the test chamber cover (113) is installed on the port of the pure oxygen test chamber (11) and sealed by the sealing ring in the first sealing groove (115); two test chamber vents (114) are provided on the other end face of the pure oxygen test chamber (11).

3. The pure oxygen testing device for a spacesuit circulating pump according to claim 2, characterized in that, The circulating pump (7) is placed in the pure oxygen test chamber (11).

4. The pure oxygen testing device for a spacesuit circulating pump according to claim 3, characterized in that, One end of the cable (13) inside the pure oxygen test chamber (11) is connected to the electrical connector of the circulating pump (7), and the other end is connected to the window cover door (112) of the pure oxygen test chamber; one end of the cable (18) outside the chamber is connected to the window cover door (112) of the pure oxygen test chamber, and the other end is connected to the pump control device (6).

5. The pure oxygen testing device for a spacesuit circulating pump according to claim 4, characterized in that, The pure oxygen test chamber (11) has two internal metal hoses (12), one end of which is connected to the inlet of the circulation pump (7) and the other end is connected to the test chamber mounting window cover (112); the other internal metal hose (12) is connected to the outlet of the circulation pump (7) and the other end is connected to the test chamber mounting window cover (112); the test chamber has two external metal hoses (17), one end of which is connected to the test chamber mounting window cover (112) and the other end is connected to the outlet of the filter (8), the inlet of which is connected to the medium supply chamber (21); the other external metal hose (17) is connected to the test chamber mounting window cover (112) and the other end is connected to the medium return valve (25).

6. The pure oxygen testing device for a spacesuit circulating pump according to claim 5, characterized in that, The pure oxygen test chamber (11) is symmetrically provided with several test chamber installation windows (111) on both sides; each test chamber installation window (111) has a second sealing groove (116) at its port, and the test chamber installation window cover (112) is installed at the port of the test chamber installation window (111) and sealed by the sealing ring in the second sealing groove (116).

7. The pure oxygen testing device for a spacesuit circulating pump according to claim 6, characterized in that, The medium supply device (2) is equipped with a medium filling valve (23) and a medium discharge valve (22).

8. The test method for a pure oxygen test apparatus for a spacesuit circulating pump according to any one of claims 1 to 7, characterized in that, include: Open the medium filling valve (23) and fill the medium supply tank (21) with 1 / 2 to 2 / 3 of the volume of medium, then close the medium filling valve (23). Adjust the high-pressure nitrogen pressure reducing valve (31) to adjust the high-pressure nitrogen pressure to the set pressure a, open the nitrogen supply valve (24) to fill the medium supply box (21) in the medium supply device (2) with nitrogen, so that the pressure inside the medium supply box (21) is maintained at the set pressure a, and then close the nitrogen supply valve (24) and the high-pressure nitrogen pressure reducing valve (31) in sequence. The circulating pump (7) is started by the pump control device (6), and the circulating pump (7) drives the medium to circulate; the test chamber cover (113) is installed on the pure oxygen test chamber (11) to seal the pure oxygen test chamber (11); Open the vacuum hand valve (16), start the vacuum device (5), pump the pressure inside the pure oxygen test chamber (11) to the set pressure b, close the vacuum hand valve (16), and close the vacuum device (5). Start the oxygen supply device (4), adjust the oxygen pressure reducing valve (15) to the set pressure c, open the oxygen supply manual valve (14), and fill the pure oxygen test chamber (11) with oxygen. When the oxygen pressure in the pure oxygen test chamber (11) reaches the set value, close the oxygen supply manual valve (14) and shut off the oxygen supply device (4) to provide the pure oxygen environment required for the pure oxygen test.

9. The method of use according to claim 8, characterized in that, Also includes: After the test is completed, the circulating pump (7) is turned off by the pump control device (6) to restore the pure oxygen test chamber (11) to normal pressure. Open the medium discharge valve (22) to release the medium.

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