CN103104441A - Vacuum pumping system and pumping method of space environment simulator for simulating lunar dust environment - Google Patents
Vacuum pumping system and pumping method of space environment simulator for simulating lunar dust environment Download PDFInfo
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- CN103104441A CN103104441A CN 201210500653 CN201210500653A CN103104441A CN 103104441 A CN103104441 A CN 103104441A CN 201210500653 CN201210500653 CN 201210500653 CN 201210500653 A CN201210500653 A CN 201210500653A CN 103104441 A CN103104441 A CN 103104441A
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Abstract
The invention discloses a vacuum pumping system of a space environment simulator special for simulating a lunar dust environment, and further relates to a pumping method using the vacuum pumping system. The system mainly comprises a roughing pump set, a molecular pump set and a cryogenic pump set. The molecular pump set and the cryogenic pump set are respectively isolated through a high vacuum gate valve and a container. The roughing pump set is communicated with the space environment simulator respectively through a main suction pipeline and a vice suction pipeline and is isolated through a high vacuum gate valve, and the main suction pipeline and the vice suction pipeline are in parallel connection. The main suction pipeline and the vice suction pipeline are respectively provided with a filter and an adjustable valve. The reasonable design of the vice suction pipeline can decrease conductance and control gas flow so as to prevent excessively fast pressure change at the initial stage of pumping. By means of the vacuum pumping system and the pumping method of the space environment simulator for simulating the lunar dust environment, the problem of vacuum obtaining in the space environment simulator under the lunar dust environment is solved, and the requirement with work vacuum degree being smaller than or equal to 4*10-3Pa in a lunar dust environment simulation test system is met.
Description
Technical field
The present invention relates to moonscape integrated environment ground simulation test technical field in the lunar exploration engineering, be specifically related to a kind of space simulator vacuum pumping system that is exclusively used in simulation lunar dust environment, also relate to a kind of method of utilizing this vacuum pumping system to bleed.
Background technique
In the lunar exploration engineering, the impact of lunar surface environment is the important step that whole engineering must be considered, and in various environmental factors, lunar dust may be one of important factor in order of lunar surface environment.Lunar dust is the thin (generally particle diameter being referred to as lunar dust less than the lunar soil particulate of 1mm) in lunar soil, and it accounts for 95% of gross mass, and major part is of a size of micron dimension, and is very tiny.Its feature: be in very easily charged in lunar surface vacuum radiation environment, very easily scatter fly upward, easily permeate, strong adhesion, profile is sharp, corrosivity is strong, it is more difficult etc. to remove.These characteristics all can produce threat to the normal use of prober and space man's safety.China's lunar exploration second phase will be implemented soft lunar landing and automatically be maked an inspection tour prospecting, reliably working in order to ensure the automatic inspection prober of mooncraft moonscape (being moon rover), must study the ground simulation method of lunar dust environment, carry out sufficient environmental simulation test, complete evaluation test on ground, to confirm that it can safe and reliable work at harsh lunar surface environment, guarantee to complete smoothly scientific research, carry out smoothly for three phases of lunar exploration and manned lunar exploration plan and establish solid scientific basic.
The existing space simulator of China can be realized three cosmic space basic parameters such as the outer hot-fluid of virtual space, cold black, vacuum.But the space simulator of simulation lunar dust environment is when realizing three parameters, also need to place a large amount of lunar dust at device interior, with simulation lunar dust environment, also there is no at present similar equipment but can also guarantee in having the simulated environment of lunar dust that the basic parameter in three cosmic space is domestic.
Adopt conventional space simulator simulation lunar dust environment, in advance grope test in find, due to lunar dust itself, can cause because the variation of air pressure is too fast that in whole pumping process the random of lunar dust fly upward on a large scale; Splashing of lunar dust caused the pollution of relevant device (especially vacuum equipment), even damage, and later stage cleaning maintenance is more difficult, with respect to the removing of lunar dust, the prevention of lunar dust more easily realized.In addition, the easily a certain amount of gas of absorption and water vapour after the lunar dust ingress of air, the discharge quantity large calculated data of reference (do not have can), and also test degree of vacuum requires≤4
*10
-3Pa, the time of therefore bleeding is longer.Obviously, conventional vacuum pumping system composition and air-exhaust method are unsuitable for using in the space simulator of simulation lunar dust environment.
Also will take appropriate measures when guaranteeing to realize testing degree of vacuum and avoid in process of the test the random of lunar dust to fly upward on a large scale, vacuum pumping system and the air-exhaust method of establishing a kind of space simulator of novel simulation lunar dust environment are very important.
Content of the present invention
The object of the invention is to provide a kind of vacuum pumping system of simulating the space simulator of lunar dust environment, complete the development of the space simulator of such particular surroundings, lunar surface environment can be simulated more really, the needs of the ground simulation test of lunar exploration engineering can be satisfied.
Another object of the present invention is to provide a kind of air-exhaust method of vacuum pumping system of the space simulator that utilizes this simulation lunar dust environment, to realize the purpose of bleeding of this system.
To achieve these goals, the present invention is completed by following technological scheme:
the vacuum pumping system of the space simulator of simulation lunar dust environment, the roughing vacuum pump group that comprises the space simulator top that is arranged on simulation lunar dust environment, molecular pump unit and cryopump unit, the acquisition that realizes high vacuum and the molecular pump unit of keeping and cryopump unit isolate to avoid pollution from the internal tank lunar dust by high vacuum push-pull valve and container respectively, and at the molecular pump unit, be provided with vacuum measuring device on pipeline between cryopump unit and space simulator, wherein, the roughing vacuum pump group is communicated with space simulator respectively and is isolated by the high vacuum push-pull valve by main exhaust pipe and the auxiliary exhaust pipe that is arranged in parallel, the roughing vacuum pump group adopts to be had the pump group of certain exhaust capacity and also be provided with vacuum measuring device on the pipeline between itself and space simulator lunar dust, be respectively arranged with filter and the adjustable gate that to filter 2 microns solid particles on main exhaust pipe and auxiliary exhaust pipe, and the appropriate design of auxiliary exhaust pipe can realize reducing conductance, control gas flow, with effective control pumping speed, the initial stage pressure that prevents from bleeding changes too fast.
Wherein, lunar dust being had the pump group of certain exhaust capacity is the combination of dried pump and Roots pump.
Wherein, filter is that the filter that contains polyester media particles paper filter core is housed.
Wherein, adjustable gate is manually-operated gate and/or electric valve.
Wherein, every kind of pump group and unit all can be realized by PLC and host computer the automatic control and measurement of vacuum suction overall process.
Wherein, can to complete the pressure range of measurement be 10 to vacuum measuring device
5Pa～5 * 10
-7Pa selects the cold rule of all-range of contamination resistance that the degree of vacuum of the space simulator of simulation lunar dust environment is measured.
A kind of method of utilizing said system to carry out vacuum suction comprises the following steps:
1) start thick pump group, first bleed by auxiliary exhaust pipe reduction of speed;
2) after degree of vacuum is lower than 100Pa, accelerate to bleed by main exhaust pipe;
3) when degree of vacuum reaches 2Pa, stable maintenance was bled 1 hour at least;
4) close adjustable gate on the major-minor exhaust pipe of roughing vacuum pump group, stop slightly taking out, keep the vacuum state in the space simulator of simulation lunar dust environment, pressurize at least 24 hours;
5) after pressurize, lunar dust is carried out degassed processing, then restart slightly to take out, reach the start pressure of molecular pump unit when pressure after, the molecular pump unit starting, the molecular pump unit carries out vacuum suction until reach the cracking pressure of cryopump unit, is pumped to test degree of vacuum≤4 * 10 by the cryopump unit
-3Pa keeps this degree of vacuum until off-test.
Wherein, bleed time and dwell time can extend according to useful load, the degree of drying of lunar dust.
Wherein, but whole pumping process Automatic Control.
Advantage of the present invention is the dust raising phenomenon that has solved lunar dust in the pumping process of space simulator of simulation lunar dust environment, overcome the high discharge quantity of lunar dust, obtained high vacuum environment in the space simulator of simulation lunar dust environment, the moon dust pollution of avoiding, help the reliability running of equipment, satisfy the lunar dust experimental enviroment requirement of astrovehicle.
Description of drawings
Fig. 1 is the structural representation of the vacuum pumping system of the present invention's space simulator of simulating the lunar dust environment.
Fig. 2 is the schematic flow sheet of the vacuum suction method of the present invention's space simulator of simulating the lunar dust environment.
Embodiment
What below introduce is embodiment as content of the present invention, below by embodiment, described content of the present invention is further illustrated.Certainly, describing following embodiment is only the content of example different aspect of the present invention, and should not be construed as the restriction scope of the invention.
Fig. 1 is the structural representation of vacuum pumping system of the space simulator of simulation lunar dust environment of the present invention.the vacuum pumping system of the space simulator of simulation lunar dust environment, the roughing vacuum pump group that comprises the space simulator top that is arranged on simulation lunar dust environment, molecular pump unit and cryopump unit, the acquisition that realizes high vacuum and the molecular pump unit of keeping and cryopump unit isolate to avoid pollution from the internal tank lunar dust by high vacuum push-pull valve and container respectively, and at the molecular pump unit, be provided with vacuum measuring device on pipeline between cryopump unit and space simulator, wherein, the roughing vacuum pump group is communicated with space simulator respectively and is isolated by the high vacuum push-pull valve by main exhaust pipe and the auxiliary exhaust pipe that is arranged in parallel, the roughing vacuum pump group adopts to be had the pump group of certain exhaust capacity and also be provided with vacuum measuring device on the pipeline between itself and space simulator lunar dust, be respectively arranged with filter and the adjustable gate that to filter 2 microns solid particles on main exhaust pipe and auxiliary exhaust pipe, the appropriate design of auxiliary exhaust pipe can realize reducing conductance, control gas flow, with effective control pumping speed, the initial stage pressure that prevents from bleeding changes too fast.
In one embodiment, the roughing vacuum pump group selection have the dried pump of certain exhaust capacity to join the combination of Roots pump to lunar dust (can be defined as dust), the pump of the type not only has very large exhaust capacity to the gas that contains dust, and can prevent the pollution that itself brings internal vacuum chamber; For fear of the impact of lunar dust, slightly take out mouth and be located at above container; Slightly take out filter all is installed on major-minor pipeline, it has high vacuum leakproofness, larger dust quantity, the easy cleaning of depositing, and inside is equipped with and is contained polyester media particles paper filter core, can effectively filter 2 microns solid particles of 99%; Major-minor pipeline is connected in parallel, and each road all has valve to control, and the main line pipeline has larger conductance ability, guarantee thick pump group effective pumping speed, auxiliary pipeline has smaller conductance ability, can control effective pumping speed, the initial stage pressure that prevents from bleeding changes too fast, the lunar dust splash that causes; All be furnished with the manually-operated gate of adjustable gate switch size on major-minor pipeline, coordinate the air aspiration process flow process to use, adapts to different operating condition of test, satisfied when bleeding time requirement, avoid that in pumping process, dust raising phenomenon appears in lunar dust.Thick pump group can realize the evacuation process of above degree of vacuum from the atmosphere to 5Pa.
Wherein, what molecular pump, cryopump were selected is the pump type with contamination resistance, and molecular pump, cryopump are installed in the top of container, are isolated by high vacuum push-pull valve and container, avoid the pollution from the internal tank lunar dust, can realize the acquisition of high vacuum and keep.
Wherein, vacuum measuring device can be completed the pressure range of measurement from 10
5Pa～5 * 10
-7Pa selects the cold rule of all-range of certain contamination resistance that the degree of vacuum of equipment is measured.
Passed through and repeatedly be with the dirt debugging, worked out ripe segmentation air-exhaust method.The flow process of vacuum suction method is as follows:
1) start thick pump group, at first lead the auxiliary pipeline reduction of speed of ability by having rill and bleed, can utilize the conductance of the adjustable gate adjusting pipeline on pipeline to control according to different useful loads, the degree of drying of lunar dust, realize the control to effective pumping speed;
2) after degree of vacuum is better than 100Pa, accelerate to bleed by main line.Utilize the conductance of the adjustable gate adjusting pipeline on pipeline to control, realize the control to the second stage effective pumping speed;
3) when degree of vacuum reaches 2Pa, stable maintenance was bled 1 hour at least;
4) close and slightly take out valve, stop thick pump group, keep the equipment vacuum state, pressurize at least 24 hours, if dust-loaded amount is larger, can the proper extension dwell time;
5) after pressurize is completed lunar dust is carried out further degassed processing, restart slightly to take out, after pressure reached the molecular pump start pressure, molecular pump started, molecular pump carries out vacuum suction after the cryopump cracking pressure, is pumped to test degree of vacuum≤4 * 10 by cryopump at last
-3Pa also keeps vacuum to off-test.
Whole pumping process can adopt Automatic Control.
Be exclusively used in formation and the flow and method of bleeding of vacuum system of the space simulator of lunar dust environment, can realize that whole pumping process can avoid occurring dust raising phenomenon under the lunar dust environment, can not produce equipment and pollute, and satisfy working vacuum degree≤4 * 10
-3The requirement of Pa.Its application be present China develop first complete and the space simulator of the ground simulation test that is applied to the lunar dust environment of success in requisite technological means.Along with the development of China's lunar exploration engineering, the carrying out in a deep going way of lunar dust environment ground simulation test R﹠D work, application prospect is extensive.
Abovely describe the present invention as an example of the lunar dust environment example, but apparent to those skilled in the art, the vacuum procurement process under the physical environment of other similar lunar dust characteristics also can be realized purpose of the present invention.
Although above the specific embodiment of the present invention has been given to describe in detail and explanation; but what should indicate is; we can carry out various equivalences to above-mentioned mode of execution according to conception of the present invention and change and revise; when its function that produces does not exceed spiritual that specification and accompanying drawing contain yet, all should be within protection scope of the present invention.
Claims (9)
1. simulate the vacuum pumping system of the space simulator of lunar dust environment, the roughing vacuum pump group that comprises the space simulator top that is arranged on simulation lunar dust environment, molecular pump unit and cryopump unit, the acquisition that realizes high vacuum and the molecular pump unit of keeping and cryopump unit isolate to avoid pollution from the internal tank lunar dust by high vacuum push-pull valve and container respectively, and at the molecular pump unit, be provided with vacuum measuring device on pipeline between cryopump unit and space simulator, wherein, the roughing vacuum pump group is communicated with space simulator respectively and is isolated by the high vacuum push-pull valve by main exhaust pipe and the auxiliary exhaust pipe that is arranged in parallel, the roughing vacuum pump group adopts to be had the pump group of certain exhaust capacity and also be provided with vacuum measuring device on the pipeline between itself and space simulator lunar dust, be respectively arranged with filter and the adjustable gate that to filter 2 microns solid particles on main exhaust pipe and auxiliary exhaust pipe, and auxiliary exhaust pipe can reduce conductance, control gas flow, with effective control pumping speed, the initial stage pressure that prevents from bleeding changes too fast.
2. vacuum pumping system as claimed in claim 1, wherein, it is the combination of dried pump and Roots pump that lunar dust is had the pump group of certain exhaust capacity.
3. vacuum pumping system as claimed in claim 1, wherein, filter is that the filter that contains polyester media particles paper filter core is housed.
4. as the described vacuum pumping system of claim 1-3 any one, wherein, adjustable gate is manually-operated gate and/or electric valve.
5. as the described vacuum pumping system of claim 1-3 any one, wherein, every kind of pump group and unit all can be realized by PLC and host computer the automatic control and measurement of vacuum suction overall process.
6. as the described vacuum pumping system of claim 1-3 any one, wherein, the pressure range that vacuum measuring device can be completed measurement is 10
5Pa～5 * 10
-7Pa selects the cold rule of all-range of contamination resistance that the degree of vacuum of the space simulator of simulation lunar dust environment is measured.
7. method of utilizing the described vacuum pumping system of claim 1-6 any one to carry out vacuum suction comprises the following steps:
1) start thick pump group, first bleed by auxiliary exhaust pipe reduction of speed;
2) after degree of vacuum is lower than 100Pa, accelerate to bleed by main exhaust pipe;
3) when degree of vacuum reaches 2Pa, stable maintenance was bled 1 hour at least;
4) close adjustable gate on the major-minor exhaust pipe of roughing vacuum pump group, stop slightly taking out, keep the vacuum state in the space simulator of simulation lunar dust environment, pressurize at least 24 hours;
5) after pressurize, lunar dust is carried out degassed processing, then restart slightly to take out, reach the start pressure of molecular pump unit when pressure after, the molecular pump unit starting, the molecular pump unit carries out vacuum suction until reach the cracking pressure of cryopump unit, is pumped to test degree of vacuum≤4 * 10 by the cryopump unit
-3Pa keeps this degree of vacuum until off-test.
8. method as claimed in claim 7, wherein, bleed time and dwell time can extend according to useful load, the degree of drying of lunar dust.
9. method as claimed in claim 7, wherein, but whole pumping process Automatic Control.
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| CN 201210500653 CN103104441A (en) | 2012-11-29 | 2012-11-29 | Vacuum pumping system and pumping method of space environment simulator for simulating lunar dust environment |
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| CN 201210500653 CN103104441A (en) | 2012-11-29 | 2012-11-29 | Vacuum pumping system and pumping method of space environment simulator for simulating lunar dust environment |
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| CN103644111A (en) * | 2013-11-26 | 2014-03-19 | 北京航空航天大学 | Device and method for testing xenon pumping speed of large-caliber external cryogenic pumps |
| CN103673992A (en) * | 2013-11-07 | 2014-03-26 | 北京卫星环境工程研究所 | Testing method for simulating lunar-dust dust rising |
| CN104122381A (en) * | 2014-07-08 | 2014-10-29 | 北京航空航天大学 | High and low temperature vacuum lunar soil environment simulator |
| CN104406748A (en) * | 2014-12-02 | 2015-03-11 | 北京卫星环境工程研究所 | Spacecraft leakage rate testing system performing parallel air extraction by molecular pumps and cryogenic pump |
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| CN108262078A (en) * | 2018-02-13 | 2018-07-10 | 中国科学院西安光学精密机械研究所 | A kind of lunar dust environmental simulation test device and method |
| CN109826774A (en) * | 2019-03-26 | 2019-05-31 | 北京卫星环境工程研究所 | Vacuum-pumping system and its configuration method for ultra-large type space simulator |
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| CN110332097A (en) * | 2019-05-21 | 2019-10-15 | 洛阳兰迪玻璃机器股份有限公司 | A kind of vacuum glass air-exhaust method and air extractor |
| CN112937930A (en) * | 2021-02-03 | 2021-06-11 | 哈尔滨工业大学 | Vacuum system for simulating lunar large dust distribution environment |
| CN113741571A (en) * | 2021-09-09 | 2021-12-03 | 北京卫星环境工程研究所 | Pressure control system for covering normal pressure to high vacuum |
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- 2012-11-29 CN CN 201210500653 patent/CN103104441A/en active Pending
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| CN103673992B (en) * | 2013-11-07 | 2017-01-25 | 北京卫星环境工程研究所 | Testing method for simulating lunar-dust dust rising |
| CN103673992A (en) * | 2013-11-07 | 2014-03-26 | 北京卫星环境工程研究所 | Testing method for simulating lunar-dust dust rising |
| CN103644111A (en) * | 2013-11-26 | 2014-03-19 | 北京航空航天大学 | Device and method for testing xenon pumping speed of large-caliber external cryogenic pumps |
| CN104122381A (en) * | 2014-07-08 | 2014-10-29 | 北京航空航天大学 | High and low temperature vacuum lunar soil environment simulator |
| CN104122381B (en) * | 2014-07-08 | 2016-01-13 | 北京航空航天大学 | A kind of vacuum high/low temperature lunar soil environment simulator and analogy method thereof |
| CN104406748A (en) * | 2014-12-02 | 2015-03-11 | 北京卫星环境工程研究所 | Spacecraft leakage rate testing system performing parallel air extraction by molecular pumps and cryogenic pump |
| CN105759862B (en) * | 2016-03-03 | 2019-03-01 | 北京卫星环境工程研究所 | The compress control method of the small capacity high pressure pipe-line system automatic deflation process of satellite |
| CN105759862A (en) * | 2016-03-03 | 2016-07-13 | 北京卫星环境工程研究所 | Pressure control method for automatic air discharge process of satellite small-volume high-pressure pipeline system |
| CN108262078A (en) * | 2018-02-13 | 2018-07-10 | 中国科学院西安光学精密机械研究所 | A kind of lunar dust environmental simulation test device and method |
| CN108262078B (en) * | 2018-02-13 | 2023-09-29 | 中国科学院西安光学精密机械研究所 | Moon dust environment simulation test device and method |
| CN109826774A (en) * | 2019-03-26 | 2019-05-31 | 北京卫星环境工程研究所 | Vacuum-pumping system and its configuration method for ultra-large type space simulator |
| CN110332097A (en) * | 2019-05-21 | 2019-10-15 | 洛阳兰迪玻璃机器股份有限公司 | A kind of vacuum glass air-exhaust method and air extractor |
| CN110218003A (en) * | 2019-05-28 | 2019-09-10 | 洛阳兰迪玻璃机器股份有限公司 | A kind of vacuum glass air extractor and method |
| CN110218003B (en) * | 2019-05-28 | 2022-01-07 | 洛阳兰迪玻璃机器股份有限公司 | Vacuum glass air extraction device and method |
| CN112937930A (en) * | 2021-02-03 | 2021-06-11 | 哈尔滨工业大学 | Vacuum system for simulating lunar large dust distribution environment |
| CN113741571A (en) * | 2021-09-09 | 2021-12-03 | 北京卫星环境工程研究所 | Pressure control system for covering normal pressure to high vacuum |
| CN113741571B (en) * | 2021-09-09 | 2023-08-25 | 北京卫星环境工程研究所 | Pressure control system for covering normal pressure to high vacuum |
| CN113920804A (en) * | 2021-09-26 | 2022-01-11 | 哈尔滨工业大学 | Large-scale multi-factor space irradiation environment integrated simulation device and simulation method |
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Application publication date: 20130515 |