CN105644812A - Environmental simulation method and system capable of achieving low dew point in large normal-pressure space - Google Patents
Environmental simulation method and system capable of achieving low dew point in large normal-pressure space Download PDFInfo
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- CN105644812A CN105644812A CN201610105340.XA CN201610105340A CN105644812A CN 105644812 A CN105644812 A CN 105644812A CN 201610105340 A CN201610105340 A CN 201610105340A CN 105644812 A CN105644812 A CN 105644812A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
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Abstract
The invention provides an environmental simulation method and system capable of achieving a low dew point in a large normal-pressure space. The environmental simulation method capable of achieving the low dew point in the large normal-pressure space is provided through comprehensive use of a liquid nitrogen storage tank, a water bath vaporizer, a gas storage tank, a circulating fan, a heater, a test chamber and the like. The purpose that a coated piece is protected through a large space solid lubricating coating structure and a mechanism product in a thermal test is achieved.
Description
Technical field
The present invention relates to the environmental simulation test technology for space flight, particularly relate to a kind of environmental simulation method and system that can realize low dew point in normal pressure large space.
Background technology
Space environment simulation test is inspection and the important means ensureing the equipment dependabilities such as space device. Development along with space technology, according to future development demand, high-power Large Spacecraft needs several thousand until the power of tens kilowatts, and middle-size and small-size rigid solar cell array has been not suitable for the application of these occasions, need to develop large area microlight-type solar battery array. Around future space station, large-scale early warning satellite, large-scale earth observation satellite etc. be need one of key technology of paying close attention to high-power energy resource system and large-scale antenna in the urgent need to, the verification experimental verification technology of large area microlight-type solar battery array and large scale high accuracy SAR antenna mechanism. In order to reduce experimentation cost, shorten the test period, under checking large space extension means space environmental simulation, the pilot system of expansion service and reliability becomes a urgent problem at ambient pressure.
Current most of spaces extension means adopts solid lubrication mode, but the performance of some type solid lubrication plated film is quite sensitive to ambient humidity, if MoS2 solid lubricant coefficient of friction under high humidity environment, up to 0.1��0.25, is the several times of coefficient of friction (about 0.04) under vacuum or low moisture environments. In normal pressure large space (more than 1000m3), how to realize low dew point environment, protect and the large space solid lubrication coating structure of humidity sensitive and the method for mechanism's product are effectively broken through always.
Summary of the invention
How the technical problem to be solved in the present invention is in the simulation realizing low dew point environment in normal pressure large space (more than 1000m3).
In order to solve this technical problem, the invention provides a kind of environmental simulation method that can realize low dew point in normal pressure large space, comprise the steps:
S0: providing liquid nitrogen storage tank, water-bath gasifier, air accumulator, circulating fan, heater and proof box, the top of described proof box is provided with overdraught even distribution device, and bottom is provided with downstream even distribution device;
S1: sufficient high-purity liquid nitrogen is stored in described liquid nitrogen storage tank;
S2: make described circulating fan, heater and proof box form circulation closed loop;
Open described circulating fan, after described circulating fan normal operation, be that described proof box is heated to preset temperature by described heater, and be incubated;
S3: described liquid nitrogen storage tank carries out supercharging, and then makes the liquid nitrogen in described liquid nitrogen storage tank be partially into described water-bath gasifier, reaches and described air accumulator after gasification wherein;
S4: treat that described reservoir pressure is stable so that described heater quits work, blocks the connection between described circulating fan and heater, connection outside and described proof box, and closes described circulating fan;
S5: described air accumulator is reduced pressure so that wherein dry nitrogen enters in described proof box through described heater and described dirty even distribution device, from described overdraught even distribution device, the humid air in described proof box is expelled to air simultaneously;
Meanwhile, again making described heater is described proof box heating so that it is the gas temperature being expelled to air arrives preset temperature;
S6: until gas flow in described proof box and after pressure stability, keeps the process of step S5, can obtain in proof box dew point in temperature required test requirements document, it is achieved environmental simulation.
Optionally, in described step S2, heat to more than 50 DEG C for described proof box.
Optionally, in described step S5, heat to 50 DEG C for described proof box.
Optionally, in described step S3, when described liquid nitrogen storage tank is carried out supercharging, it is pressurized to 0.3 to 0.4MPa further.
Optionally, in described step S0, also include providing cryogenic liquid valve, the first pneumatic diaphragm control valve, the second pneumatic diaphragm control valve, air relief valve, the 3rd pneumatic diaphragm control valve, the 4th pneumatic diaphragm control valve, the 5th pneumatic control valve and gas exhaust piping;
Wherein, described liquid nitrogen storage tank, cryogenic liquid valve, the first pneumatic diaphragm control valve, water-bath gasifier, the second pneumatic diaphragm control valve, air accumulator, air relief valve and the 3rd pneumatic diaphragm control valve are sequentially communicated;
Described heater one end connects in described proof box by described downstream even distribution device, the other end connects described 3rd pneumatic diaphragm control valve, described 4th pneumatic diaphragm control valve one end is connected in described proof box by described overdraught even distribution device, and the other end also connects described 3rd pneumatic diaphragm control valve; Described gas exhaust piping is connected in described proof box by described overdraught even distribution device, and described 5th pneumatic diaphragm control valve is located on described gas exhaust piping.
Optionally, in described step S2, in order to realize circulation closed loop, including closing the 3rd pneumatic diaphragm control valve and the 5th pneumatic diaphragm control valve, open the process of the 4th pneumatic diaphragm control valve.
Optionally, in described step S3, for making liquid nitrogen be partially into described water-bath gasifier, including opening described cryogenic liquid valve and regulating the process of described first pneumatic diaphragm control valve.
Optionally, in described step S4, for block connection between described circulating fan and heater with connect outside with described proof box, including closing described 4th pneumatic diaphragm control valve and opening the process of described 3rd pneumatic diaphragm control valve and the 5th pneumatic diaphragm control valve.
Optionally, in described step S5, for realizing the circulation of the decompression of described air accumulator and dry nitrogen, including slowly opening air relief valve, opening the process of the 3rd pneumatic diaphragm control valve.
Present invention also offers a kind of environmental simulation system that can realize low dew point in normal pressure large space, at least include the liquid nitrogen storage tank, cryogenic liquid valve, the first pneumatic diaphragm control valve, water-bath gasifier, the second pneumatic diaphragm control valve, air accumulator, air relief valve and the 3rd pneumatic diaphragm control valve that are sequentially communicated, also include the 4th pneumatic diaphragm control valve, blower fan, proof box, heater, the 5th pneumatic diaphragm control valve, gas exhaust piping and relief valve;
Wherein, top in described proof box is provided with overdraught even distribution device, bottom is provided with downstream even distribution device, described heater one end connects in described proof box by described downstream even distribution device, the other end connects described 3rd pneumatic diaphragm control valve, described 4th pneumatic diaphragm control valve one end is connected in described proof box by described overdraught even distribution device, and the other end also connects described 3rd pneumatic diaphragm control valve;Described relief valve connects in described proof box by described overdraught even distribution device, and described gas exhaust piping is connected in described proof box by described overdraught even distribution device, and described 5th pneumatic diaphragm control valve is located on described gas exhaust piping.
The present invention comprehensive use by liquid nitrogen storage tank, water-bath gasifier, air accumulator, circulating fan, heater and proof box etc.; a kind of method that can realize low dew point in normal pressure large space is provided, solves large space solid lubrication coating structure and mechanism's product protection problem to film-coated part in heat test.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the environmental simulation system that can realize low dew point in one embodiment of the invention in normal pressure large space;
Wherein, 1-liquid nitrogen storage tank; 2-cryogenic liquid valve; 3-the first pneumatic diaphragm control valve; 4-water-bath gasifier; 5-the second pneumatic diaphragm control valve; 6-air accumulator; 7-air relief valve; 8-the 3rd pneumatic diaphragm control valve; 9-the 4th pneumatic diaphragm control valve; 10-circulating fan; 11-heater; 12-downstream even distribution device; 13-proof box; 14-overdraught even distribution device; 15-the 5th pneumatic diaphragm control valve; 16-gas exhaust piping; 17-relief valve.
Detailed description of the invention
Below with reference to Fig. 1, the environmental simulation method and system that can realize low dew point in normal pressure large space provided by the invention are described in detail, it is optional embodiment of the present invention, it is believed that, those skilled in the art do not change the present invention spirit and content scope in, it is possible to it is modified and polishes.
Refer to Fig. 1, the invention provides a kind of environmental simulation method that can realize low dew point in normal pressure large space, comprise the steps:
S0: providing liquid nitrogen storage tank 1, water-bath gasifier 4, air accumulator 6, circulating fan 10, heater 11 and proof box 13, the top of described proof box 13 is provided with overdraught even distribution device 14, and bottom is provided with downstream even distribution device 12;
In the further alternative embodiment of the present invention, in described step S0, also include providing cryogenic liquid valve the 2, first pneumatic diaphragm control valve the 3, second pneumatic diaphragm control valve 5, air relief valve the 7, the 3rd pneumatic diaphragm control valve the 8, the 4th pneumatic diaphragm control valve the 9, the 5th pneumatic diaphragm control valve 15 and gas exhaust piping 16;
Wherein, described liquid nitrogen storage tank 1, cryogenic liquid valve the 2, first pneumatic diaphragm control valve 3, water-bath gasifier the 4, second pneumatic diaphragm control valve 5, air accumulator 6, air relief valve 7 and the 3rd pneumatic diaphragm control valve 8 are sequentially communicated;
Described heater 11 one end connects in described proof box 13 by described downstream even distribution device 12, the other end connects described 3rd pneumatic diaphragm control valve 8, described 4th pneumatic diaphragm control valve 9 one end connects in described proof box 13 by described overdraught even distribution device 14, and the other end also connects described 3rd pneumatic diaphragm control valve 8; Described gas exhaust piping 16 connects in described proof box 13 by described overdraught even distribution device 14, and described 5th pneumatic diaphragm control valve 15 is located on described gas exhaust piping 16.
S1: sufficient high-purity liquid nitrogen is stored in described liquid nitrogen storage tank 1; Furthermore, it is understood that II grade of purity (>=99.998) liquid nitrogen in " GJB2253A-2008 nitrogen and liquid nitrogen safety applications criterion " will be met fill tank to 20m3 liquid nitrogen storage tank 1, close storage tank pressure charging valve, open atmospheric valve, in order to using.
S2: make described circulating fan 10, heater 11 and proof box 13 form circulation closed loop;
Open described circulating fan 10, after described circulating fan 10 normal operation, heated to preset temperature for described proof box 13 by described heater 11, and be incubated;
In optional embodiment of the present invention, heat to more than 50 DEG C for described proof box 13, and be incubated two hours.
This process is combined with parts provided above, in described step S2, in order to realize circulation closed loop, including closing the 3rd pneumatic diaphragm control valve 8 and the 5th pneumatic diaphragm control valve 15, opens the process of the 4th pneumatic diaphragm control valve 9.
Specifically, step S2 can be described as again:
When needing to obtain low dew-point test environmental condition in large space, close the 3rd pneumatic diaphragm control valve 8 and the 5th pneumatic diaphragm control valve 15,4th opens pneumatic diaphragm control valve 9, ON cycle blower fan 10, after normal operation, electric heater 11 powers on, and to more than 50 DEG C and proof box 13 environment heating temperatures is incubated two hours.
S3: described liquid nitrogen storage tank 1 carries out supercharging, and then makes the liquid nitrogen in described liquid nitrogen storage tank 1 be partially into described water-bath gasifier 4, reaches and described air accumulator 6 after gasification wherein;
In described step S3, when described liquid nitrogen storage tank 1 is carried out supercharging, it is pressurized to 0.3 to 0.4MPa further.
This process is combined with parts provided above, in described step S3, for making liquid nitrogen be partially into described water-bath gasifier 4, including opening described cryogenic liquid valve 2 and regulating the process of described first pneumatic diaphragm control valve 3.
Specifically, step S3 can be described as again:
Close liquid nitrogen storage tank 1 atmospheric valve, open pressure charging valve, pressure in storage tank is increased to 0.3��0.4MPa, open cryogenic liquid valve 2, regulate the first pneumatic diaphragm control valve 2 so that appropriate liquid nitrogen enters water-bath gasifier 4. After liquid nitrogen heat absorption fully gasification, enter 20m3Air accumulator 6.
S4: treat described air accumulator 6 pressure stability so that described heater 11 quits work, blocks the connection between described circulating fan 10 and heater 11, connection outside and described proof box 13, and closes described circulating fan 10;
This process is combined with parts provided above, in described step S4, for block connection between described circulating fan 10 and heater 11 with connect outside with described proof box 13, including closing described 4th pneumatic diaphragm control valve 6 and opening the process of described 3rd pneumatic diaphragm control valve 8 and the 5th pneumatic diaphragm control valve 15.
Specifically, step S4 can be described as again:
When after air accumulator 6 pressure stability, heater 11 power-off, close circulating fan 10, close the 4th pneumatic diaphragm control valve 9, open the 3rd pneumatic diaphragm control valve 8 and the 5th pneumatic diaphragm control valve 15.
S5: described air accumulator 6 is reduced pressure so that wherein dry nitrogen enters in described proof box 13 through described heater 11 and described dirty even distribution device 12, from described overdraught even distribution device 14, the humid air in described proof box 13 is expelled to air simultaneously;
Meanwhile, described heater 11 is again made to heat for described proof box 13 so that it is the gas temperature being expelled to air arrives preset temperature;
In optional embodiment of the present invention, in described step S5, heat to about 50 DEG C for described proof box 13.
This process is combined with parts provided above, in described step S5, reduces pressure and the circulation of dry nitrogen for realizing described air accumulator 6, including slowly opening air relief valve 7, opening the process of the 3rd pneumatic diaphragm control valve 8.
Specifically, step S5 can be described as again:
Slowly open air relief valve 7, high pure nitrogen in air accumulator 6 flows through air relief valve the 7, the 3rd pneumatic diaphragm control valve 8, electric heater 11, some connection pipelines and downstream uniform board 12 even in proof box 13, humid air in casing is squeezed to gas exhaust piping 16 from overdraught uniform board 13, enters air.
S6: until gas flow in described proof box 13 and after pressure stability, keeps the process of step S5, can obtain in proof box dew point in temperature required test requirements document, it is achieved environmental simulation.
Specifically, step S6 can be described as again:
After pressure (at below malleation 300Pa) in gas flow and proof box 13 is stable, keep replacing half an hour more than, dew point in proof box 13 can be obtained, the test requirements document of-60 DEG C, reach to avoid the space product being coated with solid lubricant film to be invaded by humidity.
In order to realize method mentioned above, present invention also offers a kind of environmental simulation system that can realize low dew point in normal pressure large space, at least include the liquid nitrogen storage tank 1, cryogenic liquid valve the 2, first pneumatic diaphragm control valve 3, water-bath gasifier the 4, second pneumatic diaphragm control valve 5, air accumulator 6, air relief valve 7 and the 3rd pneumatic diaphragm control valve 8 that are sequentially communicated, also include the 4th pneumatic diaphragm control valve 9, blower fan 10, proof box 13, heater the 11, the 5th pneumatic diaphragm control valve 16, gas exhaust piping 16 and relief valve 17;
Wherein, top in described proof box 13 is provided with overdraught even distribution device 14, bottom is provided with downstream even distribution device 12, described heater 11 one end connects in described proof box 13 by described downstream even distribution device 12, the other end connects described 3rd pneumatic diaphragm control valve 8, described 4th pneumatic diaphragm control valve 9 one end connects in described proof box 13 by described overdraught even distribution device 14, and the other end also connects described 3rd pneumatic diaphragm control valve 8; Described relief valve 17 connects in described proof box 13 by described overdraught even distribution device 14, and described gas exhaust piping 16 connects in described proof box 13 by described overdraught even distribution device 14, and described 5th pneumatic diaphragm control valve 15 is located on described gas exhaust piping 16.
In sum; the present invention comprehensive use by liquid nitrogen storage tank, water-bath gasifier, air accumulator, circulating fan, heater and proof box etc.; a kind of method that can realize low dew point in normal pressure large space is provided, solves large space solid lubrication coating structure and mechanism's product protection problem to film-coated part in heat test.
Claims (10)
1. the environmental simulation method that can realize low dew point in normal pressure large space, it is characterised in that: comprise the steps:
S0: providing liquid nitrogen storage tank, water-bath gasifier, air accumulator, circulating fan, heater and proof box, the top of described proof box is provided with overdraught even distribution device, and bottom is provided with downstream even distribution device;
S1: sufficient high-purity liquid nitrogen is stored in described liquid nitrogen storage tank;
S2: make described circulating fan, heater and proof box form circulation closed loop;
Open described circulating fan, after described circulating fan normal operation, be that described proof box is heated to preset temperature by described heater, and be incubated;
S3: described liquid nitrogen storage tank carries out supercharging, and then makes the liquid nitrogen in described liquid nitrogen storage tank be partially into described water-bath gasifier, reaches and described air accumulator after gasification wherein;
S4: treat that described reservoir pressure is stable so that described heater quits work, blocks the connection between described circulating fan and heater, connection outside and described proof box, and closes described circulating fan;
S5: described air accumulator is reduced pressure so that wherein dry nitrogen enters in described proof box through described heater and described dirty even distribution device, from described overdraught even distribution device, the humid air in described proof box is expelled to air simultaneously;
Meanwhile, again making described heater is described proof box heating so that it is the gas temperature being expelled to air arrives preset temperature;
S6: until gas flow in described proof box and after pressure stability, keeps the process of step S5, can obtain in proof box dew point in temperature required test requirements document, it is achieved environmental simulation.
2. can realize the environmental simulation method of low dew point as claimed in claim 1 in normal pressure large space, it is characterised in that: in described step S2, heat to more than 50 DEG C for described proof box.
3. can realize the environmental simulation method of low dew point as claimed in claim 1 in normal pressure large space, it is characterised in that: in described step S5, heat to 50 DEG C for described proof box.
4. can realize the environmental simulation method of low dew point as claimed in claim 1 in normal pressure large space, it is characterised in that: in described step S3, when described liquid nitrogen storage tank is carried out supercharging, it is pressurized to 0.3 to 0.4MPa further.
5. can realize the environmental simulation method of low dew point as claimed in claim 1 in normal pressure large space, it is characterized in that: in described step S0, also include providing cryogenic liquid valve, the first pneumatic diaphragm control valve, the second pneumatic diaphragm control valve, air relief valve, the 3rd pneumatic diaphragm control valve, the 4th pneumatic diaphragm control valve, the 5th pneumatic control valve, gas exhaust piping and relief valve;
Wherein, described liquid nitrogen storage tank, cryogenic liquid valve, the first pneumatic diaphragm control valve, water-bath gasifier, the second pneumatic diaphragm control valve, air accumulator, air relief valve and the 3rd pneumatic diaphragm control valve are sequentially communicated;
Described heater one end connects in described proof box by described downstream even distribution device, the other end connects described 3rd pneumatic diaphragm control valve, described 4th pneumatic diaphragm control valve one end is connected in described proof box by described overdraught even distribution device, and the other end also connects described 3rd pneumatic diaphragm control valve; Described relief valve connects in described proof box by described overdraught even distribution device, and described gas exhaust piping is connected in described proof box by described overdraught even distribution device, and described 5th pneumatic diaphragm control valve is located on described gas exhaust piping.
6. can realize the environmental simulation method of low dew point as claimed in claim 5 in normal pressure large space, it is characterized in that: in described step S2, in order to realize circulation closed loop, including closing the 3rd pneumatic diaphragm control valve and the 5th pneumatic diaphragm control valve, open the process of the 4th pneumatic diaphragm control valve.
7. can realize the environmental simulation method of low dew point as claimed in claim 5 in normal pressure large space, it is characterized in that: in described step S3, for making liquid nitrogen be partially into described water-bath gasifier, including opening described cryogenic liquid valve and regulating the process of described first pneumatic diaphragm control valve.
8. can realize the environmental simulation method of low dew point as claimed in claim 5 in normal pressure large space, it is characterized in that: in described step S4, for block connection between described circulating fan and heater with connect outside with described proof box, including closing described 4th pneumatic diaphragm control valve and opening the process of described 3rd pneumatic diaphragm control valve and the 5th pneumatic diaphragm control valve.
9. can realize the environmental simulation method of low dew point as claimed in claim 5 in normal pressure large space, it is characterized in that: in described step S5, for realizing the circulation of the decompression of described air accumulator and dry nitrogen, including slowly opening air relief valve, opening the process of the 3rd pneumatic diaphragm control valve.
10. the environmental simulation system that can realize low dew point in normal pressure large space, it is characterized in that: at least include the liquid nitrogen storage tank, cryogenic liquid valve, the first pneumatic diaphragm control valve, water-bath gasifier, the second pneumatic diaphragm control valve, air accumulator, air relief valve and the 3rd pneumatic diaphragm control valve that are sequentially communicated, also include the 4th pneumatic diaphragm control valve, blower fan, proof box, heater, the 5th pneumatic diaphragm control valve, gas exhaust piping and relief valve;
Wherein, top in described proof box is provided with overdraught even distribution device, bottom is provided with downstream even distribution device, described heater one end connects in described proof box by described downstream even distribution device, the other end connects described 3rd pneumatic diaphragm control valve, described 4th pneumatic diaphragm control valve one end is connected in described proof box by described overdraught even distribution device, and the other end also connects described 3rd pneumatic diaphragm control valve; Described relief valve connects in described proof box by described overdraught even distribution device, and described gas exhaust piping is connected in described proof box by described overdraught even distribution device, and described 5th pneumatic diaphragm control valve is located on described gas exhaust piping.
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Cited By (4)
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| CN107218510A (en) * | 2017-06-19 | 2017-09-29 | 北京卫星环境工程研究所 | Space environment simulation facility is vented optimization system and the Space environment simulation facility with the system |
| CN107543030A (en) * | 2016-09-21 | 2018-01-05 | 北京卫星环境工程研究所 | Water-bath type liquid nitrogen vaporization method based on normal temperature |
| CN110171583A (en) * | 2019-06-03 | 2019-08-27 | 北京卫星环境工程研究所 | Large Spacecraft normal pressure thermal environment simulation equipment gas treatment equipment |
| CN111947707A (en) * | 2020-07-03 | 2020-11-17 | 中国气象局兰州干旱气象研究所 | Arid and semi-arid region ground surface water circulation full-component monitoring and identifying method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107543030A (en) * | 2016-09-21 | 2018-01-05 | 北京卫星环境工程研究所 | Water-bath type liquid nitrogen vaporization method based on normal temperature |
| CN107218510A (en) * | 2017-06-19 | 2017-09-29 | 北京卫星环境工程研究所 | Space environment simulation facility is vented optimization system and the Space environment simulation facility with the system |
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| CN111947707A (en) * | 2020-07-03 | 2020-11-17 | 中国气象局兰州干旱气象研究所 | Arid and semi-arid region ground surface water circulation full-component monitoring and identifying method |
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| CN105644812B (en) | 2018-01-12 |
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