CN109595133B - A kind of hall thruster stable discharging device - Google Patents
A kind of hall thruster stable discharging device Download PDFInfo
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- CN109595133B CN109595133B CN201910115785.XA CN201910115785A CN109595133B CN 109595133 B CN109595133 B CN 109595133B CN 201910115785 A CN201910115785 A CN 201910115785A CN 109595133 B CN109595133 B CN 109595133B
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- storage tank
- anode
- throttle device
- pipeline
- transition storage
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0087—Electro-dynamic thrusters, e.g. pulsed plasma thrusters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0006—Details applicable to different types of plasma thrusters
- F03H1/0012—Means for supplying the propellant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0006—Details applicable to different types of plasma thrusters
- F03H1/0031—Thermal management, heating or cooling parts of the thruster
Abstract
The present invention provides a kind of hall thruster stable discharging device, is related to hall thruster technical field.The stable discharging device near anode by being arranged a thermal throttle device, gas flow is effectively controlled using thermal throttle device, hall thruster gas distributor is allowed smoothly to carry out gas flow conveying, and then guarantee the stable discharging work of hall thruster, the variation of monitoring discharge current is not needed simultaneously, it avoids isolation sampling and smothing filtering of discharge current transient wave etc. is operated, simplify the stable discharging system of thruster.Hall thruster stable discharging device provided by the invention utilizes the temperature change of hall thruster anode, smoothly controls the gas flow of hall thruster, improves the job stability of hall thruster；Solve the problems, such as that the design of hall thruster stable discharging system is complicated and reliability is lower.
Description
Technical field
The present invention relates to hall thruster technical fields, more particularly to a kind of hall thruster stable discharging device.
Background technique
Hall thruster is widely used in satellite north and south because of the advantages that its structure is simple, specific impulse is moderate and efficiency is higher
The space propultions tasks such as position holding, orbital transfer.The gas flow of hall thruster can stable supplying be related to that its reasoning is defeated
Stability out.According to existing research, the gas supply flow size of hall thruster is closely related with discharge current, and gas supply flow is big
Then discharge current is high.The method of existing control gas supply flow is mainly to pass through the variation of monitoring discharge current, according to discharge current
Variation adjust gas supply flow accordingly.But due in the course of work of hall thruster discharge current there is low-frequency oscillation
Characteristic has certain fluctuation, it is therefore desirable to the operation such as smothing filtering is carried out to discharge current sampled signal, simultaneously because
Discharge current is the major power circuit of thruster discharge system, is needed to improve the reliability of system using necessary isolation skill
Art, isolation sampling and to smothing filtering of discharge current transient wave etc. operate so that by discharge current closed-loop control flow into
And realize that the system design of thruster stable discharging is complicated.
Summary of the invention
The object of the present invention is to provide a kind of hall thruster stable discharging device, solve thruster stable discharging is
The complicated problem of system design.
To achieve the above object, the present invention provides following schemes:
A kind of hall thruster stable discharging device, comprising: storage tank, transition storage tank, thermal throttle device and anode；
The storage tank is connected to one end of the transition storage tank by pipeline；The storage tank is for storing compressed gas；
The other end of the transition storage tank is connected to the anode by pipeline；
The thermal throttle device is arranged on the pipeline between the transition storage tank and the anode；
The thermal throttle device is used to detect the temperature change of the anode, and is adjusted and passed through according to the temperature change of the anode
Cross the gas flow of the thermal throttle device.
Optionally, the thermal throttle device is arranged apart from 2 centimeters of anode.
Optionally, further includes: latching valve；
The latching valve is arranged on the pipeline between the storage tank and the transition storage tank；The latching valve is for protecting
The safe operation of the hall thruster stable discharging device.
Optionally, further includes: pressure reducing valve；
The pressure reducing valve is arranged on the pipeline between the latching valve and the transition storage tank；The pressure reducing valve is for dropping
The pressure of the low compressed gas.
Optionally, further includes: solenoid valve；
The solenoid valve is arranged on the pipeline between the pressure reducing valve and the transition storage tank；The solenoid valve is for controlling
Make the pressure of gas in the transition storage tank.
A kind of hall thruster stable discharging device, comprising: storage tank, transition storage tank, thermal throttle device, temperature measuring equipment, control
System and anode；
The storage tank is connected to one end of the transition storage tank by pipeline；The storage tank is for storing compressed gas；
The other end of the transition storage tank is connected to the anode by pipeline；
The thermal throttle device is arranged on the pipeline between the transition storage tank and the anode；The thermal throttle device is used for
The temperature change of the gas by the thermal throttle device is detected, and is adjusted according to the temperature change by the thermal throttle device
Gas flow；
The temperature measuring equipment is arranged around the anode；The temperature measuring equipment is used to detect the temperature around the anode
Degree；
The temperature measuring equipment is electrically connected with the control system；
The control system is also electrically connected with the thermal throttle device；
The temperature signal that the control system is used to be transmitted according to the temperature measuring equipment controls the thermal throttle device and adjusts gas
Body flow.
Optionally, the temperature measuring equipment includes multiple thermocouples；
The thermocouple is distributed in around the anode, and each thermocouple is electrically connected with the control system；
The thermocouple is used to measure the temperature around the anode.
Optionally, the thermocouple is distributed in the axial direction and radial direction of the anode.
Optionally, further includes: latching valve, pressure reducing valve and solenoid valve；
The latching valve is arranged on the pipeline between the storage tank and the transition storage tank；The latching valve is for protecting
The safe operation of the hall thruster stable discharging device；
The pressure reducing valve is arranged on the pipeline between the latching valve and the transition storage tank；The pressure reducing valve is for dropping
The pressure of the low compressed gas；
The solenoid valve is arranged on the pipeline between the pressure reducing valve and the transition storage tank；The solenoid valve is for controlling
Make the pressure of gas in the transition storage tank.
The specific embodiment provided according to the present invention, the invention discloses following technical effects:
The present invention provides a kind of hall thruster stable discharging device, and the stable discharging device near anode by being arranged
One thermal throttle device effectively controls gas flow using thermal throttle device, allows hall thruster gas distributor stable
Gas flow conveying is carried out, and then guarantees the stable discharging work of hall thruster, while not needing the change of monitoring discharge current
Change, avoid isolation sampling and smothing filtering of discharge current transient wave etc. is operated, simplifies the stable discharging of thruster
System.Hall thruster stable discharging device provided by the invention utilizes the temperature change of hall thruster anode, smoothly controls
The gas flow for having made hall thruster improves the job stability of hall thruster；Solves hall thruster stable discharging
System design complexity and the lower problem of reliability.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structure chart of hall thruster stable discharging device provided by the embodiment of the present invention 1；
Fig. 2 is the structure chart of hall thruster stable discharging device provided by the embodiment of the present invention 2.
Wherein, 1, storage tank；2, latching valve；3, pressure reducing valve；4, solenoid valve；5, transition storage tank；6, thermal throttle device；7, anode；
8, temperature measuring equipment；9, control system.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Embodiment 1
The present embodiment 1 provides a kind of hall thruster stable discharging device, Fig. 1 be provided by the embodiment of the present invention 1 suddenly
The structure chart of your thruster stable discharging device.Referring to Fig. 1, a kind of hall thruster stable discharging device, comprising: storage tank 1, mistake
Cross storage tank 5, thermal throttle device 6 and anode 7.
Storage tank 1 is connected to one end of transition storage tank 5 by pipeline.Storage tank 1 is for storing compressed gas.
The other end of transition storage tank 5 is connected to anode 7 by pipeline.
Thermal throttle device 6 is arranged on the pipeline between transition storage tank 5 and anode 7.Thermal throttle device 6 is for detecting anode 7
Temperature change, and the gas flow for passing through thermal throttle device 6 is adjusted according to the temperature change of anode 7.
2 centimeters apart from anode 7 are arranged in thermal throttle device 6.
Stable discharging device further include: latching valve 2.Latching valve 2 is arranged on the pipeline between storage tank 1 and transition storage tank 5.
Latching valve 2 is used for the safe operation of protective device.
Stable discharging device further include: pressure reducing valve 3.The pipeline between latching valve 2 and transition storage tank 5 is arranged in pressure reducing valve 3
On.
Pressure reducing valve 3 for reducing compressed gas pressure.
Stable discharging device further include: solenoid valve 4.The pipeline between pressure reducing valve 3 and transition storage tank 5 is arranged in solenoid valve 4
On.
P indicates that the gas pressure in transition storage tank 5, solenoid valve 4 are used for according to the gas pressure in transition storage tank 5 in Fig. 1
Size controls the pressure of gas in transition storage tank 5.
Embodiment 2
The present embodiment 2 provides a kind of hall thruster stable discharging device, Fig. 2 be provided by the embodiment of the present invention 2 suddenly
The structure chart of your thruster stable discharging device.Referring to fig. 2, a kind of hall thruster stable discharging device, comprising: storage tank 1, mistake
Cross storage tank 5, thermal throttle device 6, temperature measuring equipment 8, control system 9 and anode 7.
Storage tank 1 is connected to one end of transition storage tank 5 by pipeline.Storage tank 1 is for storing compressed gas.
The other end of transition storage tank 5 is connected to anode 7 by pipeline.
Thermal throttle device 6 is arranged on the pipeline between transition storage tank 5 and anode 7.Thermal throttle device 6 passes through thermal center for detecting
The temperature change of the gas of device 6 is flowed, and adjusts the gas flow for passing through thermal throttle device 6 according to temperature change.
Temperature measuring equipment 8 is arranged around anode 7.Temperature measuring equipment 8 is used to detect the temperature around anode 7.
Temperature measuring equipment 8 is electrically connected with control system 9.
Control system 9 is also electrically connected with thermal throttle device 6.Control system 9 is used for the temperature signal transmitted according to temperature measuring equipment 8
Control 6 adjusting gas flow of thermal throttle device.
Temperature measuring equipment 8 includes multiple thermocouples.Thermocouple is distributed in around anode 7, each thermocouple with control system 9
Electrical connection.
Thermocouple is used to measure the temperature around anode 7.Thermocouple can be distributed in axial direction and the radial direction side of anode 7
To.
Stable discharging device further include: latching valve 2, pressure reducing valve 3 and solenoid valve 4.
Latching valve 2 is arranged on the pipeline between storage tank 1 and transition storage tank 5.
Latching valve 2 is used for the safe operation of protective device.
Pressure reducing valve 3 is arranged on the pipeline between latching valve 2 and transition storage tank 5.
Pressure reducing valve 3 for reducing compressed gas pressure.
Solenoid valve 4 is arranged on the pipeline between pressure reducing valve 3 and transition storage tank 5.
P indicates that the gas pressure in transition storage tank 5, solenoid valve 4 are used for according to the gas pressure in transition storage tank 5 in Fig. 2
Size controls the pressure of gas in transition storage tank 5.
Embodiment 3
The present embodiment 3 provides a kind of hall thruster stable discharging method, the hall thruster stable discharging method application
In a kind of hall thruster stable discharging device, which includes: storage tank, transition storage tank, thermal center
Flow device and anode.
Storage tank is connected to one end of transition storage tank by pipeline.Storage tank is for storing compressed gas.
The other end of transition storage tank is connected to anode by pipeline.
Thermal throttle device is arranged on the pipeline between transition storage tank and anode.The temperature that thermal throttle device is used to detect anode becomes
Change, and adjusts the gas flow for passing through thermal throttle device according to the temperature change of anode.
Thermal throttle device is arranged apart from 2 centimeters of anode.
Stable discharging device further include: latching valve, pressure reducing valve and solenoid valve.
Latching valve is arranged on the pipeline between storage tank and transition storage tank.Latching valve is used for the safe operation of protective device.
Pressure reducing valve is arranged on the pipeline between latching valve and transition storage tank.Pressure reducing valve for reducing compressed gas pressure
Power.
Solenoid valve is arranged on the pipeline between pressure reducing valve and transition storage tank.Solenoid valve and transition storage tank for reducing again
The pressure of compressed gas.
The hall thruster stable discharging method comprises determining that the mounting distance of thermal throttle device to anode.
Principle applied by the hall thruster stable discharging method are as follows: in the course of work of hall thruster, high pressure
Gas is flowed out from storage tank, flows through unidirectional self-lock valve, is reduced partial pressure using pressure reducing valve, is entered transition storage tank through solenoid valve
And pressure further decreases in the process.The gas of relatively low pressure enters after anode via thermal throttle device to carry out again into channel
Ionization and acceleration.In order to guarantee sensitivity of the thermal throttle device to the perception of temperature and its regulating flow, the setting of thermal throttle device is existed
Anode is nearby at 2cm, and when the variation being raised and lowered occurs in temperature of anode, thermal throttle device can sensitively perceive temperature change
Change, and according to thermal throttle device itself Thermal feedback characteristic, thermal throttle device can automatically adjust the gas flow flowed through, guarantee flow with this
The stability of control.
According to existing research, temperature of anode and gas flow size have close relationship.Gas flow is in 40sccm-
When increasing within the scope of 60sccm, anode hot-fluid, the i.e. heat flow of anode can change with gas flow, while in 40sccm-
Discharge current is approximate with gas flow directly proportional within the scope of 60sccm, therefore anode hot-fluid can be advised with the variation of discharge current
Rule is considered as anode hot-fluid with the changing rule of gas flow.It can thus be seen that temperature of anode increases when gas flow increases.
Shown in the relational expression of anode hot-fluid and temperature such as formula (1):
qanodeIndicate that the unit time crosses the heat i.e. heat flow of anode of anode；The effective mass of M expression anode；Cpanode
Indicate the specific heat capacity of anode material；TAIndicate temperature of anode；T indicates the time.
As can be seen that anode hot-fluid changes with gas flow in a certain range, while temperature of anode increases with heat flow density
Increase greatly.Therefore, it is known that the increase of gas flow will lead to temperature of anode raising.
The distance between the variable quantity of gas flow and thermal throttle device and anode are closely related, the Hall to work for one
For thruster, the discharge current of thruster should be maintained in a metastable section, so determining thermal throttle device extremely
The mounting distance of anode includes:
The tube wall sectional area of pipeline between transition storage tank and anode is A, and the distance of thermal throttle device to anode is L, anode
Temperature be TA, gas is T without the gas temperature of thermal throttle deviceg1, gas temperature of the gas after thermal throttle device is Tg2,
Thermal coefficient is λ.
The Temperature Distribution between anode and thermal throttle device is determined according to Heat Conduction Differential Equations and boundary condition, obtains temperature point
Cloth equation group:
Wherein, distance of any point to positive grade between x expression thermal throttle device and anode；T indicates that the point is (i.e. corresponding with x
Point) temperature.
The heat exchange amount Φ between thermal throttle device and anode is obtained according to Fourier law1:
Meanwhile it is Φ that gas temperature, which increases the heat obtained,2Are as follows:
Wherein, cpIndicate the specific heat at constant pressure of gas；Indicate the gas flow adjusted without thermal throttle device.
D is the diameter of capillary in formula, and δ is the thickness of gas Fluistor in thermal throttle device, and μ is coefficient of viscosity, and R indicates single
The resistance coefficient of gas Fluistor, p in bit lengthinFor the gas pressure of thermal throttle device air inlet, poutFor thermal throttle device gas outlet
Gas pressure；Invariant in K expression:
It due to the heat exchange amount between thermal throttle device and anode, is all actually taken up by gas, therefore between thermal throttle device and anode
Heat exchange amount and gas since temperature raises and absorb heat it is equal, obtain:
Φ1=Φ2(6)；
It is available according to formula (3)-(6):
By Tg2It substitutes intoIt obtains:
WhereinIndicate the gas flow after the adjusting of thermal throttle device.
Gas flow after the adjusting of thermal throttle deviceThere is linear approximate relationship between discharge current I:Wherein k is proportionality coefficient, and the value range of k is 1.11~1.25.Therefore according to the ideal fluctuation threshold of discharge current
Value≤| 10% |, it can determine the range of L between 1.3~2.5 centimetres.Rule of thumb data, the present invention are meeting thrust
In 1.3~2.5 centimetres of L range that device requires, 2cm is set by L.
According to formula (5) as can be seen that in the case that inlet and outlet pressure is constant, when a temperature increases, gas passes through thermal center
The mass flow for flowing device reduces.Thermal throttle valve self structure is simple, also exactly accurate according to temperature control changes in flow rate, therefore energy
Enough more stable control gas flows, and then guarantee the stable discharge of thruster.
It can also be arranged to accurately measure temperature and its variation, the hall thruster stable discharging device of anode
Temperature measuring equipment and control system.Temperature measuring equipment is arranged around anode.Temperature measuring equipment is used to detect the temperature around anode.
Temperature measuring equipment is electrically connected to the control system.Control system is also electrically connected with thermal throttle device.Control system is used for basis
The temperature signal of temperature measuring equipment transmitting controls thermal throttle device adjusting gas flow.Temperature measuring equipment includes multiple thermocouples.Thermocouple
It is distributed in around anode, each thermocouple is electrically connected to the control system.Thermocouple is used to measure the temperature around anode.Thermoelectricity
The axial direction and radial direction of anode can be occasionally distributed in.
2-3 temperature measuring point is arranged in the present embodiment 3 near anode, temperature measuring equipment is arranged in temperature measuring point, thermocouple will measure
Temperature signal pass to control system, and then be accurately controlled the size and stabilization of flow.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (2)
1. a kind of hall thruster stable discharging device characterized by comprising storage tank, transition storage tank, thermal throttle device and sun
Pole；
The storage tank is connected to one end of the transition storage tank by pipeline；The storage tank is for storing compressed gas；
The other end of the transition storage tank is connected to the anode by pipeline；
The thermal throttle device is arranged on the pipeline between the transition storage tank and the anode；Thermal throttle device setting away from
From 2 centimeters of anode；
The thermal throttle device is used to detect the temperature change of the anode, and is adjusted according to the temperature change of the anode and pass through institute
State the gas flow of thermal throttle device；
Further include: latching valve；
The latching valve is arranged on the pipeline between the storage tank and the transition storage tank；The latching valve is described for protecting
The safe operation of hall thruster stable discharging device；
Further include: pressure reducing valve；
The pressure reducing valve is arranged on the pipeline between the latching valve and the transition storage tank；The pressure reducing valve is for reducing institute
State the pressure of compressed gas；
Further include: solenoid valve；
The solenoid valve is arranged on the pipeline between the pressure reducing valve and the transition storage tank；The solenoid valve is for controlling institute
State the pressure of gas in transition storage tank.
2. a kind of hall thruster stable discharging device characterized by comprising storage tank, transition storage tank, thermal throttle device, thermometric
Device, control system and anode；
The storage tank is connected to one end of the transition storage tank by pipeline；The storage tank is for storing compressed gas；
The other end of the transition storage tank is connected to the anode by pipeline；
The thermal throttle device is arranged on the pipeline between the transition storage tank and the anode；The thermal throttle device is for detecting
The gas by the thermal throttle device is adjusted by the temperature change of the gas of the thermal throttle device, and according to the temperature change
Flow；
The temperature measuring equipment is arranged around the anode；The temperature measuring equipment is used to detect the temperature around the anode；
The temperature measuring equipment is electrically connected with the control system；
The control system is also electrically connected with the thermal throttle device；
The temperature signal that the control system is used to be transmitted according to the temperature measuring equipment controls the thermal throttle device regulating gas stream
Amount；
The temperature measuring equipment includes multiple thermocouples；
The thermocouple is distributed in around the anode, and each thermocouple is electrically connected with the control system；
The thermocouple is used to measure the temperature around the anode；
The thermocouple is distributed in the axial direction and radial direction of the anode；
Further include: latching valve, pressure reducing valve and solenoid valve；
The latching valve is arranged on the pipeline between the storage tank and the transition storage tank；The latching valve is described for protecting
The safe operation of hall thruster stable discharging device；
The pressure reducing valve is arranged on the pipeline between the latching valve and the transition storage tank；The pressure reducing valve is for reducing institute
State the pressure of compressed gas；
The solenoid valve is arranged on the pipeline between the pressure reducing valve and the transition storage tank；The solenoid valve is for controlling institute
State the pressure of gas in transition storage tank.
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| CN110318963B (en) * | 2019-07-08 | 2020-07-17 | 哈尔滨工业大学 | Working medium flow supply quantity adjusting device based on thermal throttle valve |
| CN110748467B (en) * | 2019-10-29 | 2020-08-21 | 中国人民解放军国防科技大学 | Intelligent control air suction type electric propulsion system applicable to multiple flow states |
| CN111140450B (en) * | 2019-12-24 | 2022-10-25 | 兰州空间技术物理研究所 | Iodine medium ground air supply device for Hall thruster and use method |
| CN112224451B (en) * | 2020-10-26 | 2021-11-23 | 中国人民解放军国防科技大学 | Low-space-orbit rarefied atmospheric molecule intake device |
| CN114527640B (en) * | 2022-02-14 | 2024-03-15 | 北京星辰空间科技有限公司 | Anti-interference high-precision storage and supply flow control method and system based on anode current |
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| US9334855B1 (en) * | 2005-12-01 | 2016-05-10 | Busek Company, Inc. | Hall thruster for use with a condensable propellant |
| CN105511308B (en) * | 2015-11-27 | 2018-02-06 | 北京控制工程研究所 | A kind of Hall electric propulsion discharge current timesharing stable control method |
| CN106771703B (en) * | 2016-11-21 | 2019-01-22 | 哈尔滨工业大学 | Hall thruster anode thermal power measurement method |
| CN109026580A (en) * | 2018-08-07 | 2018-12-18 | 柳盼 | A kind of delivery method of Hall thruster gaseous propellant |
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