CN106793441A - A kind of resolving power is the semielliptical type radio frequency-ion microthruster of micro-ox level - Google Patents
A kind of resolving power is the semielliptical type radio frequency-ion microthruster of micro-ox level Download PDFInfo
- Publication number
- CN106793441A CN106793441A CN201611160348.2A CN201611160348A CN106793441A CN 106793441 A CN106793441 A CN 106793441A CN 201611160348 A CN201611160348 A CN 201611160348A CN 106793441 A CN106793441 A CN 106793441A
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- China
- Prior art keywords
- ion
- radio
- frequency
- ionisation chamber
- microthruster
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
-
- 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
- F03H1/0081—Electromagnetic plasma thrusters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
- H05H1/4645—Radiofrequency discharges
Abstract
It is the semielliptical type radio frequency-ion microthruster of micro-ox level the invention provides a kind of resolving power, including：Ionisation chamber, radio-frequency antenna, gas handling system, radome, ion-optic system, welding connector；The ionisation chamber is semielliptical shape, ionization chamber inlet connection gas handling system, the outlet connection ion-optic system；The radome is located at ionisation chamber outside；The logical upper radio-frequency current of radio-frequency antenna, for producing eddy current field, the welding connector to be fixed on the radome in the ionisation chamber.The present invention has following technique effect：1st, ionisation chamber is designed to semielliptical shape, effectively reduces ion generation energy；2nd, radio-frequency antenna is wound on semielliptical shape ionisation chamber outside, and impedance matching is realized using LC resonance and frequency modulation technology；3rd, preposition gas distributor is designed, compared to rearmounted gas distributor, gas ionization efficiency and plasma uniformity can be effectively improved.
Description
Technical field
The present invention relates to a kind of electric propulsion system of Aerospace Satellite, and in particular to a kind of resolving power is the semielliptical of micro-ox level
Type radio frequency-ion microthruster.
Background technology
With the startup of China's Space gravitational wave detection plan, it is badly in need of the miniature electric propulsion system of development and is used to perform satellite etc.
Space craft high-precision attitude control, Orbit Transformation and without towing control etc. task.Because of the letter of radio frequency-ion thruster principle
It is single, thrust range is wide, modulation capability is strong, without built-in negative electrode and the features such as easily minimize, be chosen as primary study object.
Radio frequency-ion micromass culture system generally comprises seven parts, i.e. microthruster, averager, power supply processing unit, penetrates
Frequency generator, flow controller, pressure-reducing valve and Xe basins, and microthruster is the core of micromass culture system, its operation principle is such as
Shown in Fig. 1.Working medium Xe gas enters ionisation chamber 03 by gas distributor 01.When the logical upper radio-frequency current of radio-frequency antenna 02, in electricity
Axial magnetic field is produced from the inside of room 03, eddy current field E is then generated.The effect of this electromagnetic field centering atom and ion can
To ignore, and neutral atom is clashed into after electrons gain enough energy, ionize it, radio frequency self-maintained discharge is formed, without volume
Outer electron source.Ion in ionisation chamber 03 is accelerated to spray by ion-optic system 04, forms plume and produces thrust.Only need to adjust
Section radio-frequency power size is to be capable of achieving thrust quick regulation and high-precision control.Additionally, the flow of emitted electrons of averager 05, neutralization is pushed away
The ion stream of power device, makes whole system maintain electroneutral.
Radio frequency-ion micromass culture technology is that following micro-, moonlet realizes one of hope of high-precision attitude and orbits controlling,
How the efficiency of electric propulsion system and the research theme of life-span all the time Dou Shi world electric propulsion industry are improved.Traditional radio frequency
Ion thruster ionisation chamber is generally cylinder, in recent years it has been proposed that being changed to semicircle or taper, to expect to improve thrust
The discharging efficiency of device, achieves certain effect, but the efficiency of microthruster or relatively low.At home, it is before not related single
The research work of radio frequency-ion micromass culture technology was carried out in position, in order to meet the spaces such as the detection of spatial attraction ripple and gravity field measurement
The micromass culture demand of tasks of science, needs a kind of high accuracy, low noise, long-life and efficient radio frequency-ion microthruster badly.
The content of the invention
It is an object of the invention to provide a kind of high accuracy, low noise, long-life and efficient radio frequency-ion microthrust
Device.
In order to solve the above problems, it is the semielliptical type radio frequency-ion microthrust of micro-ox level that the present invention provides a kind of resolving power
Device, including：Ionisation chamber, radio-frequency antenna, gas handling system, radome, ion-optic system, welding connector；The ionisation chamber is half
Elliposoidal.
Further, the radio-frequency antenna is wound on semielliptical shape ionisation chamber outside, is realized using LC resonance and frequency modulation technology
Impedance matching.
Further, the gas handling system include be sequentially connected Xe gas storage tanks, pressure-reducing valve, flow controller, air inlet steel pipe,
Flexible pipe, gas distributor；The gas distributor is preposition annular gas distributor.
Further, the radome be Al-alloy casing, for electromagnetic wave from shielded radio frequency antenna to emission, Yi Miangan
Satellite other electronic systems are disturbed, while playing a part of fixed, support miscellaneous part, the welding connector is used to fix positive and negative
High-tension cable and radio-frequency cable.
Further, the ion-optic system is by screen from the inside to the outside, dish-shaped accelerating grid, the dish-shaped grid group of decelerating screen three
Into wherein the material of screen is molybdenum, connects positive high voltage (900V~1800V)；It is polymer graphite that dish accelerates grid material, connects negative height
Pressure (- 100V~-300V)；Dish-shaped deceleration grid material is invar and is grounded.
Further, the material of the ionisation chamber is aluminium oxide ceramics, and outer surface has spiral groove, the radio-frequency antenna
It is wound in the groove.
Relative to prior art, the present invention has following technique effect：
1st, ionisation chamber is designed to semielliptical shape, effectively reduces ion generation energy；
2nd, radio-frequency antenna is wound on semielliptical shape ionisation chamber outside, and impedance matching is realized using LC resonance and frequency modulation technology；
3rd, preposition gas distributor is designed, compared to rearmounted gas distributor, gas ionization efficiency can be effectively improved and waited
The gas ions uniformity.
A kind of resolving power that the present invention is provided is functional for the semielliptical type radio frequency-ion microthruster of micro-ox level, when pushing away
, in hundred micro-ox levels, thrust resolving power is up to micro-ox level for strength journey.
Brief description of the drawings
Fig. 1 is the radio frequency-ion microthruster structural representation of prior art.
Fig. 2 is the structural representation of embodiment of the present invention radio frequency-ion microthruster.
Fig. 3 is the working condition photo of embodiment of the present invention radio frequency-ion microthruster.
Fig. 4 is the ion beam current of embodiment of the present invention radio frequency-ion microthruster and the graph of a relation of power.
Fig. 5 is the graph of a relation of the specific impulse, thrust and power of embodiment of the present invention radio frequency-ion microthruster.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing.It should be noted that not conflicting
In the case of, the feature in embodiment and embodiment in the application can mutually be combined.
Embodiment one：
As shown in Fig. 2 it is the semielliptical type radio frequency-ion microthruster of micro-ox level, bag that the present invention provides a kind of resolving power
Include：Ionisation chamber 09, radio-frequency antenna 10, gas handling system, radome 12, ion-optic system 11, welding connector 13,14；Ionisation chamber
09 is semielliptical shape.
Radio-frequency antenna 2 is wound on the outside of semielliptical shape ionisation chamber 1, and impedance matching is realized using LC resonance and frequency modulation technology.
Gas handling system includes the Xe gas storage tanks (not shown), pressure-reducing valve (not shown), the flow control that are sequentially connected
Device (not shown) processed, air inlet steel pipe 06, flexible pipe 07, gas distributor 08；Gas distributor is distributed for preposition annular gas
Device.
The material of ionisation chamber 09 is aluminium oxide ceramics, and outer surface has spiral groove, and radio-frequency antenna 10 is wound in groove.
Ionisation chamber 09 is designed to semielliptical shape, and is made from insulating materials aluminium oxide ceramics, compared to traditional cylinder
Shape ionisation chamber, can save the radio-frequency power of 10%-15%, so as to effectively improve the electrical efficiency of thruster.
Radio-frequency antenna 10 is wound in semielliptical shape ionisation chamber outer surface groove using the silver-plated copper tube that external diameter is 2mm, and two
End is each passed through cable fixing part, and radio-frequency signal generator is connected to after shnt capacitor, and (this is a part for micromass culture system, no
Belong to microthruster content).Due to requiring mechanical in the space science project such as the detection of spatial attraction ripple and gravity field measurement
Moving component, therefore radio frequency adaptation can not possibly use variable capacitance, so the matching of radio-frequency antenna 10 uses LC resonance herein
And frequency modulation technology, this is that (Terrestrial Radio ion gun is usually to use L in one of places different from the development of Terrestrial Radio ion gun
Type, the T-shaped or adjustable matching network of π types).
Radome 12 be Al-alloy casing, for electromagnetic wave from shielded radio frequency antenna 10 to emission, in order to avoid interference satellite
Other electronic systems, while playing a part of fixed, support miscellaneous part.
As shown in Fig. 2 ion-optic system 11 is slowed down by being respectively plane screen, dish-shaped accelerating grid, dish from the inside to the outside
The grid of grid three is constituted, and wherein the material of screen is molybdenum, meets positive high voltage 900V~1800V；It is macromolecule stone that dish accelerates grid material
Ink, meets negative high voltage -100V~-300V；Dish-shaped deceleration grid material is invar and is grounded.
Grid main function of system be extract ionisation chamber in Xe ions and is accelerated spray, generation deboost.Three
Compared with two grid systems, its service life is longer, and focusing performance is more preferable for grid system.
Welding connector 13,14 is used to fix positive and negative high-tension cable and radio-frequency cable.
Working medium Xe gas flows through pressure-reducing valve, flow controller and air inlet steel pipe 06 from storage tank, then divides three roads to flow through flexible pipe 07
With after preposition annular gas distributor 08 enter ionisation chamber.Compared to rearmounted gas distributor (shown in Fig. 1), this kind of preposition annular
The advantage of gas distributor 08 is that the residence time that gas is evenly distributed, single Xe atoms are in ionisation chamber 09 is more long, so that
Improve the uniformity and working medium utilization rate of plasma.
Experimental result
Resolving power of the invention for micro-ox level semielliptical type radio frequency-ion microthruster working condition as shown in figure 3,
As can be seen from the figure its ion focusing is functional, the distribution of plume almost symmetry.Additionally, by optimizing rf frequency
(4.5MHz), improves radio-frequency power coupling efficiency, and in 500 μ N of maximum thrust, specific impulse is about 2200s, and gross efficiency is approached
20%.In fixed throughput and grid voltage, in the case of being adjusted merely by radio-frequency power, the ion of 1.5mA-8mA can be obtained
Line, as shown in Figure 4.Within 7mA, thruster power is linear with ion beam current.When ion beam current is more than 7mA,
Gate current is accelerated to sharply increase, this can have a strong impact on the service life of ion-optic system.Fig. 5 is according to line and accelerating potential
Estimation draws ground thrust and specific impulse scope, and its minimum thrust can also drop to about 40 by adjusting accelerating potential and working medium flow
μN.General power can obtain the continuously adjustabe thrust of 96 μ N-503 μ N when being continuously adjusted in 12.3W-31.4W, its specific impulse is 416s
~2190s.
The thruster of the present embodiment can reach 1 μ N resolving powers and noise level at present, this mainly by power supply processing unit and
The influence of radio-frequency power supply, if after being replaced with super voltage-stabilizing power supply processing unit and radio-frequency power supply in theory dividing for 0.1 μ N will can be realized
Distinguish power and noise level.
The preferred embodiments of the present invention are these are only, is not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of resolving power is the semielliptical type radio frequency-ion microthruster of micro-ox level, it is characterised in that including：Ionisation chamber, penetrate
Frequency antenna, gas handling system, radome, ion-optic system, welding connector；The ionisation chamber is semielliptical shape, ionizes chamber inlet
Connection gas handling system, the outlet connection ion-optic system；The radome is located at ionisation chamber outside；Penetrated on radio-frequency antenna is logical
Frequency electric current, for producing eddy current field, the welding connector to be fixed on the radome in the ionisation chamber.
2. radio frequency-ion microthruster as claimed in claim 1, it is characterised in that：
The radio-frequency antenna is wound on semielliptical shape ionisation chamber outside, and impedance matching is realized using LC resonance and frequency modulation technology.
3. radio frequency-ion microthruster as claimed in claim 2, it is characterised in that：
The gas handling system includes the air inlet steel pipe, flexible pipe, the gas distributor that are sequentially connected；The gas distributor is preposition ring
Shape gas distributor.
4. radio frequency-ion microthruster as claimed in claim 3, it is characterised in that：
The radome be Al-alloy casing, for electromagnetic wave from shielded radio frequency antenna to emission, in order to avoid interference satellite other
Electronic system, while playing a part of fixed, support miscellaneous part；The welding connector be used to fix positive and negative high-tension cable and
Radio-frequency cable.
5. radio frequency-ion microthruster as claimed in claim 4, it is characterised in that：
The ion-optic system is made up of screen from the inside to the outside, dish-shaped accelerating grid, the dish-shaped grid of decelerating screen three, wherein screen
Material be molybdenum, meet positive high voltage 900V~1800V；Dish accelerate grid material be polymer graphite, connect negative high voltage -100V~-
300V；Dish-shaped deceleration grid material is invar and is grounded.
6. radio frequency-ion microthruster as claimed in claim 5, it is characterised in that：
The material of the ionisation chamber is aluminium oxide ceramics, and outer surface has spiral groove, and the radio-frequency antenna is wound on described recessed
In groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611160348.2A CN106793441B (en) | 2016-12-15 | 2016-12-15 | A kind of resolving power is the semielliptical type radio frequency-ion microthruster of micro-ox level |
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| CN201611160348.2A CN106793441B (en) | 2016-12-15 | 2016-12-15 | A kind of resolving power is the semielliptical type radio frequency-ion microthruster of micro-ox level |
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| CN106793441A true CN106793441A (en) | 2017-05-31 |
| CN106793441B CN106793441B (en) | 2019-03-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005868A (en) * | 2017-11-29 | 2018-05-08 | 哈尔滨工业大学 | A kind of anode-cold air thruster combining air feeding cusped magnetic field plasma thruster |
| CN110230581A (en) * | 2019-06-13 | 2019-09-13 | 哈尔滨工业大学 | A kind of micro-ox level ion propulsion device of vortex resonance ionization |
| CN110469474A (en) * | 2019-09-04 | 2019-11-19 | 北京航空航天大学 | A kind of radio frequency plasma source for microsatellite |
| CN111456921A (en) * | 2019-01-22 | 2020-07-28 | 哈尔滨工业大学 | Microwave enhancement-based field emission thruster |
| CN113357109A (en) * | 2021-06-30 | 2021-09-07 | 哈尔滨工业大学 | Ignition device of radio frequency ion thruster |
| CN113404658A (en) * | 2021-06-30 | 2021-09-17 | 哈尔滨工业大学 | Self-neutralizing radio frequency ion thruster |
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| CN106092399A (en) * | 2016-05-20 | 2016-11-09 | 中国人民解放军装备学院 | Space flight microthruster impulse measurement platform based on torsion balance |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005868A (en) * | 2017-11-29 | 2018-05-08 | 哈尔滨工业大学 | A kind of anode-cold air thruster combining air feeding cusped magnetic field plasma thruster |
| CN111456921A (en) * | 2019-01-22 | 2020-07-28 | 哈尔滨工业大学 | Microwave enhancement-based field emission thruster |
| CN111456921B (en) * | 2019-01-22 | 2021-10-15 | 哈尔滨工业大学 | Colloid thruster based on microwave enhancement |
| CN110230581A (en) * | 2019-06-13 | 2019-09-13 | 哈尔滨工业大学 | A kind of micro-ox level ion propulsion device of vortex resonance ionization |
| CN110469474A (en) * | 2019-09-04 | 2019-11-19 | 北京航空航天大学 | A kind of radio frequency plasma source for microsatellite |
| CN110469474B (en) * | 2019-09-04 | 2020-11-17 | 北京航空航天大学 | Radio frequency plasma source for microsatellite |
| CN113357109A (en) * | 2021-06-30 | 2021-09-07 | 哈尔滨工业大学 | Ignition device of radio frequency ion thruster |
| CN113404658A (en) * | 2021-06-30 | 2021-09-17 | 哈尔滨工业大学 | Self-neutralizing radio frequency ion thruster |
| CN113404658B (en) * | 2021-06-30 | 2022-03-18 | 哈尔滨工业大学 | Self-neutralizing radio frequency ion thruster |
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| CN106793441B (en) | 2019-03-05 |
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