CN108767660A - A kind of micro groove structure cathode gas spark switch - Google Patents
A kind of micro groove structure cathode gas spark switch Download PDFInfo
- Publication number
- CN108767660A CN108767660A CN201810503409.3A CN201810503409A CN108767660A CN 108767660 A CN108767660 A CN 108767660A CN 201810503409 A CN201810503409 A CN 201810503409A CN 108767660 A CN108767660 A CN 108767660A
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- China
- Prior art keywords
- switch
- cathode
- groove structure
- micro groove
- support plate
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
- H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/20—Means for starting arc or facilitating ignition of spark gap
- H01T1/22—Means for starting arc or facilitating ignition of spark gap by the shape or the composition of the electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/02—Details
Abstract
A kind of micro groove structure cathode gas spark switch of the present invention, belongs to technical field of pulse power.Including four micro groove structure cathode, insulating gas, metal anode, switch cavity parts.Switch generally axial symmery shape, micro groove structure cathode are the metal or graphite cathode for having periodically parallel V-arrangement micro slot array structure by surface.Metal or graphite cathode and metal anode are Bruce shape, the clearance distance of micro groove structure cathode and metal anode can be adjusted, insulating gas type and pressure can change, it connect with pulse power device on the left of switch micro groove structure cathode, is connect with pulse power device on the right side of switch-mode metal anode.The present invention is applied in pulse power device, gas spark switch operating voltage is hundred KV levels, solves the problems such as gas spark switch breakdown voltage large dispersion, cathode discharge products influence very little to electrode and insulation support plate performance simultaneously, the reliability for improving switch ensure that the stable operation of pulse power device.
Description
Technical field
The invention belongs to technical field of pulse power, are related to a kind of micro groove structure cathode gas spark switch.
Background technology
In technical field of pulse power, switching technique has special consequence.It not only determines that pulse power fills
The output characteristics set, the even key of pulse power system success or failure.Wherein, gas switch has high pressure, through-flow big, structure
Simple feature, is widely used；But the stability of this switch work is poor, and repetition rate is relatively low, it is difficult to meet Gao Zhongying, height
The requirement of steady operation occasion.The achievement in research of forefathers summarizes gas switch electrode material, field distribution, surface topography, gas
The factors such as body state, voltage type achieve breakthrough to the affecting laws of breakdown characteristics to the understanding of gas switch working mechanism
Property progress.
In terms of electrode material, Luo Weixi et al. researchs think graphite as high-current switch electrode, from static self breakdown
Voltage stability and insulator service life are significantly better than metal (stainless steel, tungsten-copper alloy, copper alloy) electrode；Graphite electrode is slightly
Under non-uniform field, switch room is away from 5mm, and when dry air pressure 0.25MPa, average self-breakdown voltage is 43.6kV, relative standard
Deviation is 1.28%.Author's early period studies the gas switch characteristic of tungsten-copper alloy knife plate structure electrode, uses
Plural serial stage and corona stabilization technology improve the stability of gas switch, realize switch average voltage breakdown 120kV, relatively
Standard deviation is 1%.But due to the effective emission area very little of knife plate structure electrode, switch life is limited.
Invention content
In order under the premise of not reducing switch service life, more effectively solve high pressure gas spark switch breakdown voltage
The problem of large dispersion, the present invention is based on the spies that micro groove structure electrode has the emission area of high draw ratio and bigger simultaneously
Property, it is proposed that a kind of micro groove structure cathode gas spark switch.
The technical solution of the present invention is to provide a kind of micro groove structure cathode gas spark switch, including switch cavity, filling
In the insulating gas of switch inside cavity and the switch cathode positioned at switch inside cavity and switch anode；
It is characterized in that：
Above-mentioned switch cathode is the sections Bruce electrode (Bruce electrode) with switch anode, and structure size is identical,
It is separately fixed on opposite two walls of switch cavity；
Above-mentioned switch cathode surface open up it is multiple respectively in X direction, the microflute that is mutually parallel of Y-direction, X-direction and Y-direction
Microflute it is staggered.
Preferably, above-mentioned microflute is V-groove, and multiple V-grooves are between the direction parallel or vertical with cathode surface symmetry axis
Every uniform arrangement.
Preferably, the width of V-groove is 10~100 microns, and depth is 50~500 microns, between two neighboring V-groove
Spacing is 0~100 micron.
Preferably, above-mentioned switch cavity includes outer barrel and is arranged the insulated left side support plate in two open end of outer barrel and right side
Insulation support plate；Cathode and insulated left side support plate coaxial cooperation are switched, outside is fixed by left electrodes fixed ring；Switch sun
Pole and side insulation right support plate coaxial cooperation, outside are fixed by right electrodes fixed ring, and the thickness of outer barrel is selected by switch
The pressure size of insulating gas determines.
Preferably, insulated left side support plate and side insulation right center position of support plate are provided with and switch cathode and switch anode
The matched through-hole of pedestal；Switch cathode and the pedestal for switching anode are each passed through through-hole and are fixed on insulated left side support plate and right side
On insulation support plate.
Preferably, between outer barrel and insulated left side support plate and side insulation right support plate, insulated left side support plate and right side
It is equipped with insulated enclosure circle between insulation support plate and switch cathode, switch anode, by switch inside cavities insulating gas and outside
Boundary is isolated.
Preferably, it is circular o shape sealing rings that insulated enclosure circle, which is cross section, and annulus and circular cross sectional dimensions are by close
Seal structure and form determine.
Preferably, above-mentioned switch cathode is metal or graphite cathode, and above-mentioned switch anode is metal anode.
Preferably, when it is metallic cathode to switch cathode, metal selects tungsten-copper alloy, stainless steel, brass or titanium alloy.
Preferably, the clearance distance of switch cathode and switch anode can be adjusted by two lateral electrode fixed rings, switch sun
Maximum clearance distance between pole and switch cathode is no more than the 1/3 of switch cathode or switch anode overall diameter.
The present invention operation principle be：Pulse power device to switch charge to certain voltage after, micro groove structure cathode with
Quasi- uniform electric field is built between metal anode, micro groove structure is under certain forceful electric power field action, since the delamination tip-field of multidimensional is sent out
The effect of penetrating forms plasmasphere in cathode surface, provides high density electronics by metal or graphite cathode and form stable electricity
Component forms electron avalanche and extremely fast develops on the sunny side with insulating gas ionization by collision, eventually leads between entirely switching anode and cathode
Insulating gas punctures completely, and the switch course of work terminates.
The beneficial effects of the invention are as follows：A kind of micro groove structure cathode gas spark switch is proposed, operating voltage is 100,000
Grade is lied prostrate, is applied in pulse power device, micro groove structure cathode forms stable initiating electron source under forceful electric power field action, essence
Really control switch breakdown process, solves the problems, such as gas spark switch breakdown voltage large dispersion, ensure that pulse power fills
The stable operation set.
Description of the drawings
Fig. 1 is a kind of micro groove structure cathode gas spark switch diagrammatic cross-section proposed by the present invention；
Fig. 2 is micro groove structure cathode surface schematic diagram.
Reference numeral is in figure：2- stainless steel anodes, 3- high pure nitrogens, 4- microflute graphite cathodes, 5- micro slot array structures,
6- organic glass support plates, 7- outer barrels, 8- nuts, 9- sealing rings, 10- switch cavity.
Specific implementation mode
A kind of micro groove structure cathode gas spark of the present invention is described in detail with reference to the accompanying drawings and examples.
A kind of microflute graphite cathode gas spark in the present embodiment, including it is microflute graphite cathode 4, high pure nitrogen 3, stainless
Steel anode 2,10 4 parts of switch cavity, generally axial symmery shape.
Refering to fig. 1, Fig. 2, microflute graphite cathode 4 are to construct graphite microflute battle array by laser ablation method in graphite cathode surface
Array structure 5 is constituted.Graphite cathode 4 and stainless steel anode 2 are Bruce shape, and overall diameter is 25mm, and thickness of electrode is
8mm, the straight mouth diameter of electrode tip holder are 10mm, and electrode tip holder screw thread is M8；Microflute graphite cathode 4 and left side organic glass support plate 6
Coaxial cooperation, outside are connected by left side stainless steel nut 8；Stainless steel anode 2 is coaxially matched with right side organic glass support plate 6
It closes, outside is connected by right side stainless steel nut 8；Stainless steel outer barrel 7 and 6 coaxial cooperation of left and right organic glass support plate, silicon rubber
Glue sealing ring 9 is isolated from the outside 10 inside high pressure nitrogen 2 of cavity is switched.
Micro slot array structure 5 include in X direction with multiple V-grooves arranged at equal intervals of Y-direction, X-direction and the side Y
To V-groove it is interlaced, and the length direction of V-groove and switch cathode surface symmetry axis it is perpendicular or parallel, width of mini longitudinal channels is
25 microns, depth is 100 microns, and two neighboring microflute spacing is 25 microns.
Left and right sides organic glass support plate 6 is disc-shape, and thickness 3mm, center is reserved and microflute graphite
The through-hole identical with 2 pedestal of stainless steel anode of cathode 4, diameter 10mm；6 outside diameter of organic glass support plate and stainless steel outer barrel
7 inner surface diameters are identical, are 140mm.2 maximum pressure of nitrogen is 0.8MPa, and the thickness of stainless steel outer barrel 7 is 5mm.
The clearance distance of microflute graphite cathode 4 and stainless steel anode 2 can be adjusted by both sides stainless steel nut 8, maximum
Clearance distance should be no more than 8mm.
Silicone rubber O-ring 9 be circular ring structure, cross section be circle, annulus overall diameter be 140mm, interior diameter 130mm,
Cross-sectional diameter is 10mm.
Under the conditions of identical switch form, on-load voltage, 0.8MPa high pure nitrogens, when cathode is graphite cathode, open
Pass breakdown voltage average value is 100kV, and the relative standard deviation of voltage magnitude is 4%；And when cathode is microflute graphite cathode,
Switch breakdown voltage average value is 80kV, and the relative standard deviation of voltage magnitude is only 0.4%, and dispersibility is obviously reduced, and is improved
The breakdown stability and functional reliability of high pressure gas spark switch, ensure that the stable operation of pulse power device.
Claims (10)
1. a kind of micro groove structure cathode gas spark switch, including switch cavity, the insulating gas for being filled in switch inside cavity
And positioned at the switch cathode and switch anode for switching inside cavity；
It is characterized in that：
The switch cathode is the sections Bruce electrode with switch anode, is separately fixed on opposite two walls of switch cavity；
The switch cathode surface open up it is multiple respectively in X direction, the microflute that is mutually parallel of Y-direction, X-direction and Y-direction it is micro-
Slot is staggered.
2. a kind of micro groove structure cathode gas spark switch according to claim 1, it is characterised in that：The microflute is V
Type groove, multiple V-grooves are uniformly arranged along the direction interval parallel or vertical with cathode surface symmetry axis.
3. a kind of micro groove structure cathode gas spark switch according to claim 2, it is characterised in that：The width of V-groove
It it is 10~100 microns, depth is 50~500 microns, and the spacing between two neighboring V-groove is 0~100 micron.
4. a kind of micro groove structure cathode gas spark switch according to claim 1, it is characterised in that：The switch cavity
Including outer barrel and insulated left side support plate and side insulation right support plate in two open end of outer barrel are set；It switchs cathode and left side is exhausted
Edge support plate coaxial cooperation, outside are fixed by left electrodes fixed ring；Anode and side insulation right support plate coaxial cooperation are switched,
Outside is fixed by right electrodes fixed ring.
5. a kind of micro groove structure cathode gas spark switch according to claim 4, it is characterised in that：Insulated left side supports
Plate and side insulation right center position of support plate are provided with and switch cathode and the switch matched through-hole of anode pedestal；It switchs cathode and opens
The pedestal of pass anode is each passed through through-hole and is fixed in insulated left side support plate and side insulation right support plate.
6. a kind of micro groove structure cathode gas spark switch according to claim 5, it is characterised in that：Outer barrel is exhausted with left side
Between edge support plate and side insulation right support plate, insulated left side support plate and side insulation right support plate and switch cathode, switch sun
Insulated enclosure circle is equipped between pole.
7. a kind of micro groove structure cathode gas spark switch according to claim 6, it is characterised in that：Insulated enclosure circle is
Cross section is circular o shape sealing rings.
8. a kind of micro groove structure cathode gas spark switch according to claim 1, it is characterised in that：The switch cathode
For metal or graphite cathode, the switch anode is metal anode.
9. a kind of micro groove structure cathode gas spark switch according to claim 1, it is characterised in that：When switch cathode is
When metallic cathode, metal selects tungsten-copper alloy, stainless steel, brass or titanium alloy.
10. a kind of micro groove structure cathode gas spark switch according to claim 9, it is characterised in that：Switch anode with
Switch the maximum clearance distance between cathode is no more than switch cathode or switch anode overall diameter 1/3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810503409.3A CN108767660A (en) | 2018-05-23 | 2018-05-23 | A kind of micro groove structure cathode gas spark switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810503409.3A CN108767660A (en) | 2018-05-23 | 2018-05-23 | A kind of micro groove structure cathode gas spark switch |
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| CN108767660A true CN108767660A (en) | 2018-11-06 |
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| CN201810503409.3A Pending CN108767660A (en) | 2018-05-23 | 2018-05-23 | A kind of micro groove structure cathode gas spark switch |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642244A (en) * | 2020-11-29 | 2021-04-13 | 胡家应 | Dust fall purifier of dusty waste gas |
| CN113013732A (en) * | 2021-04-14 | 2021-06-22 | 中国人民解放军国防科技大学 | Special-shaped self-breakdown high-voltage gas switch with peak electrode structure |
| CN113097032A (en) * | 2021-04-23 | 2021-07-09 | 西北核技术研究所 | Long-life micro-column array graphite and metal composite cathode structure and preparation method thereof |
| CN113193483A (en) * | 2021-04-14 | 2021-07-30 | 中国人民解放军国防科技大学 | Hemispherical self-breakdown high-voltage gas switch with peak electrode structure |
| CN113394662A (en) * | 2021-06-23 | 2021-09-14 | 长安大学 | Coupled multi-rod-flat-plate electrode corona stabilizing switch and working method thereof |
| CN113555773A (en) * | 2021-07-08 | 2021-10-26 | 中国人民解放军国防科技大学 | Self-breakdown high-voltage gas switch based on surface modified graphite electrode |
| CN114243454A (en) * | 2021-12-24 | 2022-03-25 | 北京京航计算通讯研究所 | Self-breakdown gas switch and pulse power device |
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| CN101777730A (en) * | 2010-04-09 | 2010-07-14 | 华中科技大学 | Designing method of graphite electrode of high energy pulse gas switch |
| CN101783480A (en) * | 2010-03-22 | 2010-07-21 | 华中科技大学 | Two-electrode gas spark switch |
| CN103219652A (en) * | 2013-03-22 | 2013-07-24 | 华中科技大学 | Large-current closed inflatable spark interval |
| CN103490285A (en) * | 2013-08-29 | 2014-01-01 | 中国科学院长春光学精密机械与物理研究所 | High-efficiency long-service-life discharge triggering non-chained pulse DF laser device combined electrode |
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| CN103219652A (en) * | 2013-03-22 | 2013-07-24 | 华中科技大学 | Large-current closed inflatable spark interval |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642244A (en) * | 2020-11-29 | 2021-04-13 | 胡家应 | Dust fall purifier of dusty waste gas |
| CN113013732A (en) * | 2021-04-14 | 2021-06-22 | 中国人民解放军国防科技大学 | Special-shaped self-breakdown high-voltage gas switch with peak electrode structure |
| CN113193483A (en) * | 2021-04-14 | 2021-07-30 | 中国人民解放军国防科技大学 | Hemispherical self-breakdown high-voltage gas switch with peak electrode structure |
| CN113193483B (en) * | 2021-04-14 | 2022-06-28 | 中国人民解放军国防科技大学 | Hemispherical self-breakdown high-voltage gas switch with peak electrode structure |
| CN113097032A (en) * | 2021-04-23 | 2021-07-09 | 西北核技术研究所 | Long-life micro-column array graphite and metal composite cathode structure and preparation method thereof |
| CN113097032B (en) * | 2021-04-23 | 2023-10-20 | 西北核技术研究所 | Long-life micro-column array graphite and metal composite cathode structure and preparation method thereof |
| CN113394662A (en) * | 2021-06-23 | 2021-09-14 | 长安大学 | Coupled multi-rod-flat-plate electrode corona stabilizing switch and working method thereof |
| CN113555773A (en) * | 2021-07-08 | 2021-10-26 | 中国人民解放军国防科技大学 | Self-breakdown high-voltage gas switch based on surface modified graphite electrode |
| CN113555773B (en) * | 2021-07-08 | 2022-07-05 | 中国人民解放军国防科技大学 | Self-breakdown high-voltage gas switch based on surface modified graphite electrode |
| CN114243454A (en) * | 2021-12-24 | 2022-03-25 | 北京京航计算通讯研究所 | Self-breakdown gas switch and pulse power device |
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Application publication date: 20181106 |
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