CN109459255A - The Multi-use pipeline feed system of replaceable cathode gas source and flowmeter - Google Patents
The Multi-use pipeline feed system of replaceable cathode gas source and flowmeter Download PDFInfo
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- CN109459255A CN109459255A CN201811304971.XA CN201811304971A CN109459255A CN 109459255 A CN109459255 A CN 109459255A CN 201811304971 A CN201811304971 A CN 201811304971A CN 109459255 A CN109459255 A CN 109459255A
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- Prior art keywords
- pipeline
- pressure
- gas source
- valve
- mass flowmenter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
Abstract
This patent is the requirement based on electric propulsion ground experiment task, a set of propellant pipeline feed system for electric propulsion Hall and a kind of replaceable cathode gas source and mass flowmenter of ion thruster of design.This feed system is mainly adjusted by gas source, pressure, mass flow is adjusted and pipeline insulate, and this several part forms.Experiment is caused to stop during in order to avoid replacement gas source, using the scheme of backup quality flow control system.The mass flow of multichannel backup adjusts part and is mainly used for during the test in the case where not influencing experiment process, and the calibration that can be carried out to mass flowmenter again is calibrated, and replacement mass flowmenter.By adding low pressure hand valve respectively before and after flowmeter, come gaseous state when guaranteeing replacement, in pipeline and vacuum chamber.This patent can satisfy in electric propulsion experimentation to propellant pipeline feed system flow, pressure and in terms of requirement, simultaneously, propellant can either be provided for the experiment of hall thruster, and the experiment for capableing of ion thruster carries out relevant gas piping supply.
Description
One, technical field:
The invention of this pipeline belongs to electric propulsion technology field, and the Multi-use pipeline for being related to replaceable cathode gas source and flowmeter supplies
To system.
Two, background technique:
Electric propulsion is mainly the kinetic energy for converting electrical energy into propellant, while being obtained using the reaction force of working medium injection
Thrust.This advanced propulsion method compares with traditional chemical propulsion, has high specific impulse, control precision is high, the service life is long etc.
A variety of advantages.It has passed through the development up to 60 years, current international electric propulsion technology has been becoming better and approaching perfection day by day.
Meanwhile with the diversified development of domestic space mission demand, the ground experiment of electric propulsion also gradually becomes multiple
It is miscellaneous.In addition to the design of thruster, the feeding pipe system of propellant also has become most important in electric propulsion ground experiment
A part, it needs to control a variety of physical parameters such as flow, pressure, state of propellant, and each parameter can
The influence for being difficult to estimate is generated to the performance test experiment of thruster.
The relevant technologies in the field of China's electric propulsion at present gradually develop, we have had various electric propulsions
Ground experiment facility and relevant feeding pipe system, still, with thruster to propellant related property parameter increasingly
High required precision, present existing feed system can no longer meet the requirement of our various thruster performance tests, so,
From this demand, a set of corresponding propellant-feed system is devised.
Three, summary of the invention:
The Multi-use pipeline feed system of replaceable cathode gas source and flowmeter be mainly used for hall thruster and from
The pipeline of sub- thruster ground experiment supplies, this system mainly meets these following functions:
(1) thruster in capable of testing for electric propulsion provides the reliable and stable adjustable gas propulsive of pressure and flow
Agent.
(2) in order to guarantee that flowmeter can at every moment reach required precision, in the branch that each is equipped with flowmeter
Road suffers from spare flowmeter, in order to replace proving flowmeter under the premise of not influencing experiment.
(3) it can be replaced not in the case where not suspending experiment at any time during the test, with the variation of requirement of experiment
With the gas source of gaseous propellant purity, to meet the test in experiment to thruster performance.
(4) simultaneously, in order to avoid in experimentation, because cabin is charged, and corresponding member in pipeline feed system is damaged
Device.So devise insulating joint in the coupling part of a whole set of pipeline and cabin, pipeline device is protected with this.
(5) it is not promoted substantially compared to other pipelines in order to make the propellant feed of whole system more stable
The influence of agent fluctuation of pressure added surge tank in the leading portion of pipeline.
The related component of this patent is as follows: this circuits feed system mainly includes high pressure xenon gas cylinder, pressure gauge, decompression
Valve, surge tank, low pressure hand valve, mass flowmenter, filter, insulating joint and each component of connection stainless steel cleaning pipe with
And the composition such as VCR connector.Vacuum chamber, thruster and thrust frame etc. and the summary of the invention for being not belonging to this patent, relevant member device
Part belongs to designed, designed, processing according to the finished product pipeline that corresponding design requirement is purchased.
Fig. 1 is pipeline feed system schematic diagram.
Propellant of the xenon bottle 1,2 as a whole set of feed system.
Pressure gauge 3/4,7/8 is respectively used to the variation of pressure in the pipeline before and after real-time monitoring pressure reducing valve.
Pressure reducing valve 5,6 is mainly that the high pressure propellant gas for providing gas source is adjusted to mass flowmenter normal work needs
Pressure orientation within, while maintain entire pipeline pressure it is relatively stable.
Surge tank 9,10 is mainly the fluctuation of pressure in further buffer system, and whole system is made to be in more stable work
Make state.
Low pressure hand valve 11~16,22~26 is mainly used for controlling the on-off of flowmeter branch, meanwhile, before mass flowmenter
Rear hand valve can carry out the sealing of pipeline, guarantee the gas in vacuum chamber and pipeline with this when its calibration dismounting
The cleanliness of environment and pipeline.
Mass flowmenter 17~21 is the flow rate for controlling gas flow in each bypass line, is wanted according to the experiment of design
It asks and provides accurate, stable, adjustable propellant to thruster.
Filter 27~29 is for the impurity in filter pipeline, to guarantee the purity of channel interior propellant, another party
Face is damaged also for thruster is prevented therefore impurity.
Insulating joint 30~32 is prevented in pipe-line system in order to which vacuum chamber and the isolation of entire pipeline feed system come
Mass flowmenter be damaged because of conductive.
What each pipe joint was all made of is 1/4VCR connector made in Great Britain, sealed reliable convenient for disassembly and assembly.Pipeline passes through cabin simultaneously
Flange enters vacuum chamber, and vacuum chamber can provide high-vacuum simulation environment for the steady operation of thruster.
Four, the advantages of this patent:
The major advantage of this patent has:
1. the gas circuit of this system with being designed to replaceable cathode gas source gas circuit, can satisfy to gas with various propellant
Experimental design, such as different purity of gas of the same race or the experiment of purity gas with various of the same race.On the other hand, in replacement cathode gas
It does not need to close engine during the ground of source, more will not influence the normal work of thruster.
2. being carried out inside this pipeline feed system to anode and cathode pipeline mass-flow rate of propellant control section
Backup, for during the experiment, replacement and calibrational capacity timing to will not influence the normal work of thruster.
3. in order to guarantee that the fluctuation of pressure of gas source has substantially no effect on the supply of a whole set of pipeline during pipeline supplies,
It added surge tank in the upstream portion of pipeline, keep whole air-flow more stable.
4. in order to which the mass flowmenter for protecting each component of pipe-line system especially more accurate was not tested
Voltage and current in journey is broken, therefore, in the downstream of system, the position connecting with cabin added insulating joint.In addition, also existing
The upstream of insulating joint added filter, further improve the purity into the gaseous propellant of thruster.
Five, experimental implementation process:
1. gas source part:
The gas source part of the pipeline is made of gas source-A and gas source-B: mainly being included high pressure xenon gas cylinder A, B, is pressed before valve
The gas circuit of power table 3,4, pressure reducing valve 5,6, downstream pressure table 7,8, surge tank 9,10 and pipeline -2 controls hand valve 11.Such as gas
Source-A, high pressure xenon gas cylinder-A are connected by 1/4VCR connector with designed stainless steel pipeline, pressure reducing valve 3,4 and stainless steel tube
Road is connected by 1/4VCR connector.
Under normal conditions, the gas supply of gas source-A and gas source-B are mutually indepedent, and gas source-A is to anode gas circuit, cathode gas
Road 2 and 3 supplies propellant, and gas source-B only individually supplies propellant to cathode 2,3, does not give anode gas circuit supply gas
Propellant.The process for switching cathode gas source-A and gas source-B is as follows:
(1) confirmation cathode gas source needs replacing: in experimentation, according to experiment demand, it is higher that cathode, which needs replacing,
The xenon of purity, alternatively, needing replacing cathode propellant type in order to measure the performance of different propellants, carrying out gas source at this time
Replacement.
(2) gas cylinder replacement is carried out:
A. the low pressure hand valve 11,12,13 before being first shut off cathode manifold flowmeter.
B. the body valve for slowly opening gas source-B slowly opens pressure reducing valve 6 after the registration of pre-valve pressure gauge 4 is stablized
Valve, the registration of downstream pressure table 8 is stablized in 0.3Mpa or so.
At this point, the gas source of cathode has been replaced with B by A.
2. pressure is adjusted:
In this pipe-line system, the pressure of a whole set of pipeline adjusts the pre-valve pressure gauge 3,4 mainly against upstream, decompression
This few part composition of valve 5,6, downstream pressure table 7,8 and surge tank 9,10.All parts by stainless steel welded pipeline and
VCR connector is formed by connecting.In experimental project, we can delay according to the range of requirement of experiment and each mass flowmenter
Slow control valve 5,6 controls the pressure of supply propellant by observation downstream pressure table 7,8 within the scope of required,
The pressure that simultaneous buffering tank is also able to maintain whole system is stablized.
3. mass flowmenter is adjusted:
Mass flowmenter 18,20 is 17,19 spare flowmeter respectively.Meanwhile before and after each mass flowmenter
It all added low pressure valve, can close each pipeline when needing replacing flowmeter in this way, make pipeline and vacuum
It can be always maintained at the state of low pressure and enough cleanliness in cabin, tested accordingly after convenient (to replace flow
For meter -1):
A. it replaces flowmeter -1: closing the low pressure hand valve 16,26 of -1 front and back of flowmeter, unscrew VCR connector；Change new matter
Flowmeter is measured, the coupling part of pipeline is tightened.It is first turned on valve -26 later, the pipeline in flowmeter downstream is first taken out
Then sky opens valve -16 again.
B. cut-in stand-by flowmeter: the valve control switch of mass flowmenter -1 is first closed, closes valve -16,26 later.It connects
Get off, opens valve 15,25, then slowly adjust mass flowmenter -1 ', be adjusted to it in designed range.
Claims (5)
1. pipeline component part:
The Multi-use pipeline feed system of replaceable cathode gas source and mass flowmenter, it is mainly characterized by comprising: that 1. can replace
The gas source of cathode meets different requirement of experiment.It, can be necessary 2. cathode and anode manifolds suffer from spare branch
Moment replacement mass flowmenter either uses spare duct.3. this pipeline feed system can not only be used to be hall thruster
Carry out pipeline supply, additionally it is possible to supply propellant for the ground experiment of ion thruster.4. simultaneously, in order to guarantee a whole set of pipeline
Safety is also mounted with insulating joint in pipe line downstream.This pipeline feed system is mainly by gas source, mass flow adjusting, pressure
It adjusts and is formed with several parts such as stable and insulated part:
(1) gas source part:
The gas source part of the pipeline is made of gas source -1 and gas source -2: mainly include high pressure xenon gas cylinder A, B, pre-valve pressure gauge 3,
4, pressure reducing valve 5,6, downstream pressure table 7,8, the gas circuit control hand valve 11 of surge tank 9,10 and pipeline-B.Such as gas source-A, it is high
Pressure xenon bottle-A is connected by 1/4VCR connector with designed stainless steel pipeline, and pressure reducing valve 3,4 passes through with stainless steel pipeline
1/4VCR connector is connected.Under normal working condition, gas source-A and gas source-B can work independently, and be independent of each other, gas source-
A can give while supply propellant to anode, cathode 2/3, and gas source-B is then to supply propellant to cathode 2/3.
(2) mass flow adjusts part:
In view of needing to demarcate during the experiment to mass flowmenter, meanwhile, when mass flowmenter damage, in order to
Enough that flowmeter is replaced in the case where not influencing experiment process, this patent adjusts part to the mass flow of anode and cathode gas circuit
It backs up, mass flowmenter 17,19 is respectively on the main line of anode gas circuit and cathode gas circuit；18,20 points of mass flowmenter
It is not 17,19 backup；There is low pressure hand valve in the front and back of each mass flowmenter, is mainly used to closing pipe line and guarantees to manage
Gaseous environment in road in the cleanliness of xenon and maintenance vacuum chamber, and easy disassembly, replacement mass flowmenter；Adjacent first device
It is connected by pipeline with 1/4VCR connector between part.
(3) pressure regulating part point:
In this pipe-line system, the pressure of a whole set of pipeline adjusts the pre-valve pressure gauge 3,4 mainly against upstream, pressure reducing valve 5,
6, downstream pressure table 7,8 and this several part of surge tank 9,10 form.All parts are connect by stainless steel welded pipeline and VCR
Head is formed by connecting.In experimental project, we can slowly adjust according to the range of requirement of experiment and each mass flowmenter
Valve 5,6 is saved, the pressure of supply propellant is controlled by observation downstream pressure table 7,8 within the scope of required, simultaneously
The pressure that surge tank is also able to maintain whole system is stablized.
(4) insulated part:
In order to prevent during the test, because voltage, electric current etc. in cabin or in other equipment are transmitted to pipeline supply
In system.So be additionally arranged insulating joint in the downstream of pipe-line system, for completely cutting off cabin and pipe-line system, protected with this
Each component in pipeline, especially mass flowmenter.
2. cathode gas source replacement process:
According to the Multi-use pipeline feed system of replaceable cathode gas source and mass flowmenter that claim one is described, yin
Pole gas source replacement process is as follows:
(1) confirmation cathode gas source needs replacing: in experimentation, according to experiment demand, cathode is needed replacing as higher purity
Xenon carry out gas source replacement at this time alternatively, need replacing cathode propellant type to measure the performance of different propellants.
(2) gas cylinder replacement is carried out:
A. the low pressure hand valve 11,12,13 before being first shut off cathode manifold flowmeter.
B. the body valve for slowly opening gas source-B slowly opens the valve of pressure reducing valve 6 after the registration of pre-valve pressure gauge 4 is stablized
Door stablizes the registration of downstream pressure table 8 in 0.3Mpa or so.
At this point, the gas source of cathode has been replaced with B by A.
3. pressure is adjusted
According to the Multi-use pipeline feed system of replaceable cathode gas source and mass flowmenter that claim one is described, pressure
Power adjustment process is as follows:
In this pipe-line system, the pressure of a whole set of pipeline adjusts the pre-valve pressure gauge 3,4 mainly against upstream, pressure reducing valve 5,
6, downstream pressure table 7,8 and this several part of surge tank 9,10 form.All parts are connect by stainless steel welded pipeline and VCR
Head is formed by connecting.In experimental project, we can slowly adjust according to the range of requirement of experiment and each mass flowmenter
Valve 5,6 is saved, the pressure of supply propellant is controlled by observation downstream pressure table 7,8 within the scope of required, simultaneously
The pressure that surge tank is also able to maintain whole system stablizes (by taking flowmeter -1 as an example): slowly opening -1 upstream of mass flowmenter first
Low pressure hand valve -16 and 26 then flowmeter is adjusted by the valve control of mass flowmenter -1 switch, is at institute
It is required that flow rate.
4. mass flowmenter is adjusted
According to the Multi-use pipeline feed system of replaceable cathode gas source and mass flowmenter that claim one is described, pressure
Power adjustment process is as follows:
Mass flowmenter 18,20 is 17,19 spare flowmeter respectively.Meanwhile adding before and after each mass flowmenter
Low pressure valve has been gone up, each pipeline can have been closed when needing replacing flowmeter in this way, make in pipeline and vacuum chamber
It can be always maintained at the state of low pressure and enough cleanliness, tested accordingly after convenient (to replace flowmeter -1
For):
A. it replaces flowmeter -1: closing the low pressure hand valve 16,26 of -1 front and back of flowmeter, unscrew VCR connector；Change new quality stream
Meter tightens the coupling part of pipeline.It is first turned on valve -26 later, the pipeline in flowmeter downstream is first evacuated, then
Valve -16 is opened again.
B. cut-in stand-by flowmeter: the valve control switch of mass flowmenter -1 is first closed, closes valve -16,26 later.Next,
Valve 15,25 is opened, then slowly adjusts mass flowmenter -1 ', is adjusted to it in designed range.
5. component
According to the Multi-use pipeline feed system of replaceable cathode gas source and mass flowmenter that claim one is described, before valve
Pressure gauge 3,4 ranges are 0~3000psi；Pressure reducing valve 5,6 entrance 0~10MPa of range, 0~0.6MPa of output range；It is pressed after valve
Power table 7,8 ranges are -0.1~1.1MPa；Downstream pressure is adjusted to 0.3Mpa by working condition.24/25 range of mass flowmenter
For 0~100sccm；26/27 range of mass flowmenter is 0~10sccm；28/29 range of mass flowmenter is 0~10sccm.
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| CN201811304971.XA CN109459255B (en) | 2018-11-02 | 2018-11-02 | Multipurpose pipeline supply system with replaceable cathode gas source and replaceable flowmeter |
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| CN109459255B CN109459255B (en) | 2021-10-26 |
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Cited By (3)
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| CN113483939A (en) * | 2021-07-06 | 2021-10-08 | 中国人民解放军国防科技大学 | Fixed position variable pressure fuel injection system |
| CN115614185A (en) * | 2022-11-22 | 2023-01-17 | 东方空间(西安)宇航技术有限公司 | Gas-liquid supply system of hot test run table of rocket engine |
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| CN113483939A (en) * | 2021-07-06 | 2021-10-08 | 中国人民解放军国防科技大学 | Fixed position variable pressure fuel injection system |
| CN115614185A (en) * | 2022-11-22 | 2023-01-17 | 东方空间(西安)宇航技术有限公司 | Gas-liquid supply system of hot test run table of rocket engine |
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