CN101539485B - Electric propulsion test platform liquid propellant supplying device - Google Patents

Electric propulsion test platform liquid propellant supplying device Download PDF

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Publication number
CN101539485B
CN101539485B CN2009100830317A CN200910083031A CN101539485B CN 101539485 B CN101539485 B CN 101539485B CN 2009100830317 A CN2009100830317 A CN 2009100830317A CN 200910083031 A CN200910083031 A CN 200910083031A CN 101539485 B CN101539485 B CN 101539485B
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China
Prior art keywords
propellant
tank
liquid
pressure
valve
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Expired - Fee Related
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CN2009100830317A
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Chinese (zh)
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CN101539485A (en
Inventor
刘畅
汤海滨
訾振鹏
钟凌伟
张莘艾
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Beihang University
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Beihang University
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Publication of CN101539485B publication Critical patent/CN101539485B/en
Expired - Fee Related legal-status Critical Current
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Abstract

An electric propulsion test platform liquid propellant supplying device comprises a propellant transfer storage tank, a propellant storage tank, a flowing measuring device, a propellant pipeline device, a liquid propellant filling device and a high-pressure air supply device. The liquid propellant filling device is connected with the propellant transfer storage tank and the propellant storage tank, and connecting pipelines are provided with filling valves. The propellant flows into a propellant supplying pipeline from the propellant storage tank by means of storage tank pressurization, and enters an engine. After testing, the pressure inside the pipelines can be released via a pipeline release valve. The invention can accurately measure the flow rate of liquid propellant and the pre-spraying pressure at the time of engine functioning, and can simultaneously guarantee the safety of testing personnel at site in propellant supplying operation or other operations.

Description

Electric propulsion test platform liquid propellant supplying device
Technical field
The invention belongs to the electric propulsion engine field, be specifically related to the liquid propellant supplying device of electric propulsion engines such as resistance heated engine, Arcjet arc heated engine, ion engine, MPD thruster.
Background technology
Electric propulsion engine have than leap high, life-span length, repeated starting, control accuracy advantages of higher, in tasks such as spacecraft rail control, survey of deep space, interplanetary flight, have broad prospect of application.The electric propulsion The Application of Technology will effectively increase useful load, reduction launch cost, the raising spacecraft overall technology level of spacecraft.Therefore, by ground experiment electric propulsion engine is studied and extensively carried out.
Electric resistor heating type thruster in the electric propulsion family, Arcjet engine, ion engine, MPD thruster or the like are widely studied.Above-mentioned electric propulsion thrust device can be selected the propellant of liquid working substance as engine operation.Therefore liquid propellant supplying device is indispensable in the electric propulsion engine ground simulation test.The present invention is intended to set up the liquid propellant supplying device that a cover satisfies the electric propulsion testing requirements.
Propellant flow rate is to be used for assessing the indispensable parameter of thruster performance, and the electric propulsion engine ground experiment need be measured accurate propellant flow rate, determines the performance of thruster.This shows the propellant flow rate measurement and be controlled in the engine test very important.
Some liquid propellant in the electric propulsion test is as N 2H 4, having severe corrosive, strong volatility, operational danger is very high, so liquid propellant supplying device must have high security, prevents that operating personnel from causing danger.
Summary of the invention
The objective of the invention is to set up a cover electric propulsion test(ing) liquid propellant supply equipment, stable at requiring liquid propellant to supply with in the electric propulsion test, supply flow rate is adjustable, and liquid propellant may have severe corrosive, strong volatile specific (special) requirements, and a kind of liquid propellant supplying device that is applicable to the electric propulsion test is provided.This liquid propellant supplying device major function comprises: the liquid propellant that stability of flow can be provided for the electric propulsion test; Can accurately measure the liquid propellant flow; Can carry out severe corrosive, strong volatile liquid propellant feed, security is good; While liquid propellant supplying device working stability, flow will accurately be controlled.
Technical scheme of the present invention is as follows:
Electric propulsion test platform liquid propellant supplying device comprises propellant transfer tank, propellant tank and flow measurement device, propellant pipeline device, filling device of liquid propellant, high-pressure air source device etc.
The high-pressure air source device provides gases at high pressure stably to electric propulsion test platform liquid propellant supplying device.The high-pressure air source device is made up of high pure nitrogen gas cylinder, cylinder pressure gauge, manipulation gas manually-operated gate, filling supercharging valve, tank supercharging valve and air blowing tapping valve.The high pure nitrogen gas cylinder provides high-pressure air source.High pure nitrogen pressure in the cylinder pressure gauge monitoring gas cylinder when high pure nitrogen pressure is less than 5MPa in the gas cylinder, should be changed the high pure nitrogen gas cylinder.Handling gas manually-operated gate significant feature is to provide manipulation gas for air-operated solenoid valve, the main effect of filling supercharging valve is to provide the filling supercharging required gases at high pressure in propellant transfer tank, the main effect of tank supercharging valve is the gases at high pressure that the tank supercharging is provided in propellant tank, the main effect of air blowing tapping valve is that propellant blowing residual in will managing after off-test is clean, avoids that residue is arranged in the pipeline.
Filling device of liquid propellant uses high-pressure air source to give the supercharging of transfer tank by transfer tank supercharging valve, utilize the pressure differential between transfer tank and the propellant tank, liquid propellant is therefrom dumped case to be transferred in the propellant tank, its pressure can be regulated by the decompressor valve, and the pressure in the transfer tank can be monitored by tensimeter.After filling finishes, use the pressure in the propellant transfer tank air release door knob transfer tank to release.The liquid propellant filling is finished.
The transfer tank is liquid propellant source in the filling device of liquid propellant, and the transfer tank provides propellant for filling device of liquid propellant.It is 5L that the transfer tank adopts volume, and pressure-bearing is the stainless cylinder of steel of 10MPa.
Propellant tank in propellant tank and the flow measurement device is the final destination of liquid propellant in the filling device of liquid propellant, and it also is the basic index of judging that filling device of liquid propellant and method be whether feasible that liquid propellant filling enters propellant tank.Propellant tank is a spherosome, and volume is that 2L, design pressure are 4MPa, and casing adopts titanium alloy to be welded, and has reliable structural strength and corrosion resistance.
Liquid propellant supplying device uses high-pressure air source by the supercharging of tank supercharging valve feeding body propellant tank, make and produce pressure differential between propellant tank and the propellant feed pipeline, utilize this pressure differential that liquid propellant is clamp-oned the propellant feed pipeline from propellant tank, liquid propellant filters through filtrator and finally enters engine, the pressure of tank supercharging can be regulated by the decompressor valve, and the pressure in the propellant tank can be monitored by pressure transducer.Can in the propellant feed pipeline, charge into gases at high pressure by air blowing tapping valve after the off-test, propellant blowing residual in the pipeline is clean, avoid that residue is arranged in the pipeline, and release by the pressure in the tank air release door knob propellant tank.
The flow of liquid propellant is measured by flow measurement device in the test.The full name of flow measurement device is a fully elastic small amount of flow measuring device, a kind of fully elastic small amount of flow measuring device, comprise bracket assembly, rigorous analysis balance, propellant tank, full elastic connecting pipe road, by-pass valve control, monostable electromagnetic valve and pressure compensation unit, wherein critical component is gentle full elastic connecting pipe road, rigorous analysis sky.Rigorous analysis balance level is placed on the platform of upper support frame; Full elastic connecting pipe road pipeline, one end is connected with the propellant tank porch, the other end is fixed on the bracing frame crossbeam by the flexible fastening piece, and this full elastic connecting pipe road adopts diameter 2mm, internal diameter to be the metal thin tube of 0.25mm, and must to guarantee that the metal pipe has enough elasticity.By-pass valve control be meant be installed on the bracing frame, the by-pass valve control in the tank upstream and downstream pipeline, these valves be used for to tank annotate, the control of function such as supercharging, supply.Comprise that specifically tank supercharging valve, tank filling valve, blowback valve, Liquid valve and pressure transducer connect the hand valve, valve interface is standard DN4,37 ° of joints and is connected with bulb on the respective line; Monostable electromagnetic valve is installed on the tank propellant export pipeline, is used for accurately controlling the service time of propellant; The pressure compensation unit, comprise pressure transducer and pressure transducer connection hand valve, pressure transducer is installed in tank supercharging valve and pressurization gas enters on the propellant tank pipeline before, pressure transducer also was installed before pressure transducer connects the hand valve, can controlled pressure compensating unit on off state.
The propellant pipeline is divided into propellant feed pipeline and propellant blowing pipeline two parts.Propellant tank is subjected to the extruding of gases at high pressure, opens the propellant Liquid valve, and propellant flows out from tank and enters in the propellant feed pipeline, filtration enters engine through filter, the effect of filtrator is the impurity of removing in the propellant, in order to avoid cause line clogging, test is impacted.The effect of propellant blowing pipeline is: after off-test, propellant feed pipeline main valve is closed, propellant cutoff, and the gases at high pressure that provided by high-pressure air source enter pipeline, propellant residual in the pipeline is cleared up through the propellant blowing pipeline, avoided that residue is arranged in the pipeline.Behind the end of operation, to exit pressure release operation of pipeline.
The waste gas that means of deflation is emitted all enters unified concentrated recycling in the air collecting chamber, and waste liquid will enter outside neutralizing tower and handle, and avoid causing environmental pollution.
The invention has the advantages that:
(1) electric propulsion test platform liquid propellant supplying device adopts specially designed pipeline to connect and operation steps, make in the whole supply process, liquid propellant is in the airtight environment all the time, can be used in to have volatility, particularly has the supply work of the liquid propellant of toxicity.
(2), press before the spray in the time of can accurately measuring the flow of liquid propellant and engine operation by flow measurement device and pressure transducer.
(3) this liquid propellant supplying device can not accumulate liquid propellant after test finishes, and the liquid propellant pipeline all blows down.The safety when thereby the site test personnel that guaranteed carry out propellant feed operation and other operations.
Description of drawings
Fig. 1 is the air distributing device schematic diagram;
Fig. 2 is propellant tank and flow measurement device general assembly synoptic diagram.
1. propellant tank and flow measurement device 2. propellant transfer tanks
3. propellant transfer tank Liquid valve 4. propellant transfer tank rain glasss
5. propellant filtrator 6. propellant feed main line air-operated solenoid valves
7. propellant Liquid valve C 8. propellant reverse flow valve B 9. glass tubes 10. propellant reverse flow valve A
11. cross storehouse bump joint 12. propellant filtrator A 13. propellant filter B
14. pressure pressure sensor 15. engine electromagnetic valves 16. electric propulsion engines before the engine spray
17. vacuum bin device 18. high pure nitrogen gas cylinders 19. repropellenting supercharging valves
20. repropellenting supercharging decompressor valve 21. propellant tank supercharging valves
22. propellant tank supercharging decompressor valve 23. propellant main line air blowing tapping valves
24. propellant tank supercharging decompressor valve 25. is handled gas manually-operated gate 26. nitrogen cylinder pressure gauges
27. propellant transfer tank venting air-operated solenoid valve 28. propellant tanks venting air-operated solenoid valve
29. solenoid valve A 30. solenoid valve B 31. solenoid valve C
32. air blowing tapping pipeline air release door 33. discharges
34. discharge gas-discharge hand valve
101. bracket assembly 102. tank supercharging valves 103. blowback valves 104. tanks filling valve
105. propellant Liquid valve A 106. propellant Liquid valve B
107. the full elastic connecting pipe of propellant elastic tube fixed block 108. liquid gas circuits road
109. pressure transducer 110. pressure transducers are connected the hand valve
111. propellant elastic tube fixed block 112. propellant tank feeding pipe interfaces
113. propellant tank plug 114. propellant tanks 115. tank fixed trays 116. rigorous analysis balances
117. four-way
Embodiment
Below, describe in proper order according to the embodiment and the general use of this contrive equipment in process of the test of electric propulsion test platform liquid propellant supplying device, conveniently understand and use.
The electric propulsion test platform liquid propellant feed system comprises propellant transfer tank, propellant tank and Flow Measuring System, propellant pipeline system, liquid propellant loading system, gas cylinder air supply system.
What the connection of each several part was used in the device is the stainless-steel tube of Φ 8 * 2mm, what used on the full elastic connecting pipe road 108 in the flow measurement device is the stainless steel tubule of good springiness, and as shown in Figure 2, diameter 2mm, internal diameter are 0.25mm, and tubule is processed into spring-like, guarantee elasticity.
Whole decompressor valve standards of using in the device are: intake pressure: 3~23MPa, top hole pressure: 0.2~5MPa, flow: 0.033kg/s~0.11kg/s.Whole hand stop valve standards of using in the device are: valve interface is connected as standard DN4,37 ° of joints and with bulb on the respective line.
Guarantee at first before operating that all valves all close.At first open before the work and handle gas manually-operated gate 25, the manipulation gas that feedway is required is handled gas and is mainly used in switch propellant feed main line air-operated solenoid valve 6, propellant transfer tank venting air-operated solenoid valve 27 and propellant tank venting air-operated solenoid valve 28.
Liquid propellant at first is stored in the propellant transfer tank 2, open repropellenting supercharging valve 19, high pure nitrogen enters propellant transfer tank 2 from high pressure nitrogen gas cylinder 18 by pipeline, can regulate pressure in the propellant transfer tank 2 by decompressor valve 20, propellant transfer tank rain glass 4 is used for monitoring the pressure in the propellant transfer tank 2.After transfer tank 2 internal pressures raise, open propellant transfer tank Liquid valve 3 and tank filling valve 104, propellant enters propellant tank 114 under the effect of high pressure, as shown in Figure 2, the quality of propellant in propellant tank and the flow measurement device 1 monitoring propellant tank, reach requirement after, close charging line valve 19,20 and 104, filling is finished, and opens the pressure in propellant transfer tank venting air-operated solenoid valve 28 venting pipelines and the tank.Switch propellant transfer tank venting air-operated solenoid valve 28 needed manipulation gas are by solenoid valve 31 controls.
The supply of liquid propellant also is to use the squash type of gases at high pressure to supply with.Open propellant tank supercharging valve 21, high pure nitrogen enters propellant tank 114 by pipeline, the tank internal pressure can be regulated by propellant tank supercharging decompressor valve 22, open pressure transducer and connect 110 (as shown in Figure 2) of hand valve, pressure transducer 109 (as shown in Figure 2) can detect the pressure in the tank.Open propellant Liquid valve 105 (as shown in Figure 2), propellant Liquid valve 106 (as shown in Figure 2) and propellant feed main line air-operated solenoid valve 6, by crossing the propellant pipeline that storehouse bump joint 11 enters in the vacuum storehouse 17, the effect of filtrator 5 is to filter after propellant goes out propellant tank 114 to liquid propellant along pipeline.Propellant enters in the vacuum storehouse behind the pipeline, arrives the engine electromagnetic valve 15 in engine the place aheads through filtrator 12,13.Open engine electromagnetic valve 15, propellant just can enter engine 16, carries out work.Pressure pressure sensor 14 can be monitored the pressure in the pipeline before engine 16 sprayed, and made preceding pressure of engine spray equal to press before the constant engine spray by regulating propellant tank supercharging decompressor valve 22.Switch propellant feed main line air-operated solenoid valve 6 needed manipulation gas are by solenoid valve 29 controls.
Write down propellant flow rate by propellant tank and flow measurement device 1 in the test.Accompanying drawing 2 is the general assembly synoptic diagram of propellant tank and flow measurement device 1.Flow measurement device full name fully elastic small amount of flow measuring device specifically comprises bracket assembly 101, tank supercharging valve 102, blowback valve 103, tank filling valve 104, propellant Liquid valve A105, propellant Liquid valve B106, propellant elastic tube fixed block 107, the full elastic connecting pipe of liquid gas circuit road 108, pressure transducer 109, pressure transducer is connected hand valve 110, propellant elastic tube fixed block 111, propellant tank feeding pipe interface 112, propellant tank plug 113, propellant tank 114, tank fixed tray 115, rigorous analysis balance 116, four-way 117.Rigorous analysis balance 116 among the present invention has incorporated weight and realizes calibration automatically, guarantees the accuracy of weighing result.Rigorous analysis balance 116 is provided with liquid crystal display clearly for showing reading, is furnished with built-in RS232 communication interface simultaneously, can connect peripherals such as printer, computer and realize data acquisition.Rigorous analysis balance 116 sheathing materials are to have ABS engineering plastics well corrosion-resistant, shock resistance, guarantee that balance is light, firm, can bear the propellant mild corrosion.Rigorous analysis balance 116 has functions such as simple weighing, number percent weighing, the weighing of reckoning by the piece, Dynamic Weighting, plus-minus weighing, and concrete parameter is as follows:
Readable: 0.01g
Maximum capacity value: 4100g
Repeatability (s): 0.01g
Linear: ± 0.02g
Scale pan size: Φ 180mm
Physical dimension: 238 * 335 * 111 (W * D * H) (mm)
After test is finished, can carry out blow-line purging, avoid having in the pipeline propellant residual by using high-pressure air source.Close propellant feed pipeline air-operated solenoid valve 6, close propellant tank supercharging valve 21 and propellant tank supercharging decompressor valve 22, open propellant tank venting air-operated solenoid valve 28, the tank internal pressure is released.Open propellant pipeline air blowing tapping valve 23 and propellant tank supercharging decompressor valve 24, gas enters in the propellant feed pipeline, and pressure can be regulated by propellant tank supercharging decompressor valve 24.During blowing, untapped propellant can be got back to tank by propellant Liquid valve 7 in the propellant feed pipeline, and waste liquid will be by propellant reverse flow valve 8, propellant reverse flow valve 10 to outside neutralizing tower, can observe blowing situation in the pipeline by glass tube 9.After blowing is finished,, waste gas is discharged by the pressure in the air blowing tapping pipeline air release door 32 venting pipelines.Switch propellant tank venting air-operated solenoid valve 28 needed manipulation gas are by solenoid valve 30 controls.
The waste gas unification of discharging by venting valve 27,28,32 in apparatus of the present invention is collected in the discharge 33, opens discharge gas-discharge hand valve 34, and the waste gas in the discharge 33 is entered in the outside neutralizing tower, avoids contaminated environment.
In N2H4 arc heated engine test, successfully adopted this liquid propellant supplying device that the arc heated engine is carried out the hydrazine propellant feed.At N 2H 4On the arc heated block testing stand, adopt this liquid propellant supplying device the arc heated engine to be carried out do not take place in the process of hydrazine propellant feed the phenomenon of hydrazine propellant leakage, working condition is good.

Claims (3)

1. electric propulsion test platform liquid propellant supplying device, it is characterized in that: described device comprises propellant transfer tank, propellant tank and flow measurement device, propellant pipeline device, filling device of liquid propellant and high-pressure air source device; Described high-pressure air source device provides gases at high pressure stably for described electric propulsion test platform liquid propellant supplying device, comprise high pure nitrogen gas cylinder, cylinder pressure gauge, manipulation gas manually-operated gate, filling supercharging valve and air blowing tapping valve, being controlled to be electric propulsion test platform liquid propellant supplying device by described valve provides manipulation gas, tank pressurization gas, filling pressurization gas and blows down pressurization gas; Described filling device of liquid propellant uses the gases at high pressure of described high-pressure air source device, give the supercharging of transfer tank by filling supercharging valve, utilize the pressure differential between transfer tank and the propellant tank, liquid propellant is therefrom dumped case to be transferred in the propellant tank, after filling finishes, use the pressure in the transfer tank air release door knob transfer tank in the described filling device of liquid propellant to release;
Described electric propulsion test platform liquid propellant supplying device uses the gas of high-pressure air source device to give the propellant tank supercharging by tank supercharging valve, make and produce pressure differential between propellant tank and the propellant feed pipeline, utilize this pressure differential that liquid propellant is clamp-oned the propellant feed pipeline from propellant tank, liquid propellant enters engine through the filtrator filtration of feeding pipe in the described propellant pipeline, releases by the pressure in the described liquid propellant supplying device tank air release door knob propellant tank after test is finished;
Described propellant tank and flow measurement device comprise bracing frame, rigorous analysis balance, propellant tank and full elastic connecting pipe road, in test the flow of liquid propellant are measured; The critical component of described flow measurement device is gentle full elastic connecting pipe road, rigorous analysis sky; Described rigorous analysis balance level is placed on the platform of support frame as described above; Described full elastic connecting pipe road, an end is connected with the propellant tank porch, and the other end is fixed on the support frame as described above crossbeam by the flexible fastening piece; Described propellant pipeline is divided into propellant feed pipeline and propellant blowing pipeline two parts; Described propellant feed pipeline comprises filtrator, propellant feed pipeline main valve, propellant Liquid valve; Described propellant tank is subjected to the extruding of gases at high pressure, opens the propellant Liquid valve in the propellant feed pipeline, and propellant flows out from tank and enters in the propellant feed pipeline, and the filtrator in described feeding pipe filters and enters engine; Propellant blowing device comprises propellant Liquid valve, return valve and glass tube; After off-test, the gases at high pressure that provided by high-pressure air source enter the propellant feed pipeline, and propellant residual in the propellant feed pipeline is cleared up through described propellant blowing pipeline, avoid in the propellant feed pipeline residue being arranged;
The waste gas that described venting valve is emitted all enters the interior unified recycling of concentrating of discharge of electric propulsion test platform liquid propellant supplying device, and waste liquid will enter outside neutralizing tower and handle.
2. electric propulsion test platform liquid propellant supplying device according to claim 1 is characterized in that: it is the stainless cylinder of steel of 10Mpa that the transfer tank adopts pressure-bearing; Propellant tank is a spherosome, and design pressure is 4MPa, and the casing of transfer tank and propellant tank all adopts titanium alloy to be welded.
3. electric propulsion test platform liquid propellant supplying device according to claim 1 is characterized in that: it is the metal thin tube of 0.25mm that diameter 2mm, internal diameter are adopted in full elastic connecting pipe road.
CN2009100830317A 2009-04-24 2009-04-24 Electric propulsion test platform liquid propellant supplying device Expired - Fee Related CN101539485B (en)

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CN101539485B true CN101539485B (en) 2011-02-16

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CN107271189B (en) * 2017-06-12 2019-10-01 北京航空航天大学 A kind of propellant sustainable supply system for electric propulsion engine test for a long time
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Inventor after: Liu Chang

Inventor after: Tang Haibin

Inventor after: Zi Zhenpeng

Inventor after: Zhong Lingwei

Inventor after: Zhang Shenai

Inventor before: Tang Haibin

Inventor before: Zi Zhenpeng

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Inventor before: Zhang Shenai

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Free format text: CORRECT: INVENTOR; FROM: TANG HAIBIN ZI ZHENPENG ZHONG LINGWEI ZHANG XINAI TO: LIU CHANG TANG HAIBIN ZI ZHENPENG ZHONG LINGWEI ZHANG XINAI

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