CN105228329A - A kind of method and arc plasma generator disperseing the electric arc raising generator life-span - Google Patents
A kind of method and arc plasma generator disperseing the electric arc raising generator life-span Download PDFInfo
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- CN105228329A CN105228329A CN201510727872.2A CN201510727872A CN105228329A CN 105228329 A CN105228329 A CN 105228329A CN 201510727872 A CN201510727872 A CN 201510727872A CN 105228329 A CN105228329 A CN 105228329A
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- electric arc
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- expansion structure
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Abstract
The present invention relates to a kind of method and the arc plasma generator that disperse the electric arc raising generator life-span.Electric arc flowed through the confined channel of minor diameter and impels the expansion structure passage of electric arc expansion, electric arc expansion before attaching anode, reduced the current density of electric arc in electrode surface adhesion zone, thus reduced electrode erosion.Electric arc dispersion of the present invention effectively can reduce electrode erosion, improves the generator life-span, according to different application condition design generator, can extend the range of application of this generator.
Description
Technical field
The present invention relates to a kind of method and the arc plasma generator that disperse the electric arc raising generator life-span.
Background technology
Direct current non-diverting formula arc plasma generator has the application and research history of many decades in wide fields such as industry manufacture, Science Explorations, environmental protection, health care, national defense safeties.The current density of electric arc in electrode surface adhesion zone may more than 10
8a/m
2, so high current density causes electrode erosion, shortens generator useful life.Meanwhile, the pollution of electrode erosion product also limit the application in this kind of plasma field such as material thermal characteristics accurate evaluation in the synthesis, wind tunnel experiment of fine components material.Therefore, recent decades, various minimizing electrode erosion is never interrupted with the trial improving the plasma generator life-span.
In commercial Application, the large power electric arc plasma generator of high-efficiency and continuous running more needs the generator of high life low ablation.At present, sandwich longer interlude between a cathode and an anode at generator, widen distance between negative electrode and positive electrode to improve arc voltage, make under identical arc power condition, to reduce arc current, to reduce electrode erosion.Or adopt multipair electrode group to disperse electric arc in the attaching of electrode surface simultaneously, to reduce the local current density attaching arc root, slow down the pernicious ablation of local of electrode.Just the hot plasma generator architecture of this structure is complicated, and safeguard and expend greatly, power supply needs high voltage design.
Summary of the invention
The object of the invention is to: for direct current non-diverting formula arc plasma generator anode ablation problem, propose a kind of method reducing arc plasma generator electrode erosion.
The invention provides a kind of method of disperseing electric arc to improve the generator life-span, comprise the steps:
The first step, external voltage excites between negative electrode and anode and produces electric arc;
Second step, electric arc moves from negative electrode anode direction, through Planar Mechanisms and expansion structure passage, makes electric arc expand dispersion thus reduces arc current density;
3rd step, electric arc arc-root attachment anode.
Further, described expansion structure passage can be taper, or streamlined, or cross section sudden expansion structure.
The present invention also provides a kind of arc plasma generator, comprising:
Negative electrode;
Anode, after electric arc transmission direction is arranged on described negative electrode;
Constraint and expansion structure passage, be arranged between described negative electrode and anode, expanding dispersion thus reducing arc current density, reducing electrode erosion during electric arc docile anode for making electric arc.
Further, described constraint and expansion structure passage are positioned at anode, and namely anode is constraint and expansion structure passage simultaneously.
Further, described anode is open expansion structure.
Further, described anode is the constricted channel structure with adjustment plasma jet flow field.
Further, described constraint and expansion structure passage are interlude.
Further, described interlude is installed for suspending.
Further, also comprise insulating part, be arranged between described interlude and described anode.
Beneficial effect of the present invention:
First, by the design of expansion structure, distributing arc plasma generator makes electric arc be separated into low current density before close to electrode surface, reduces electrode erosion, improves the generator life-span.
Secondly, distributing arc plasma generator expansion structure and position thereof can be designed according to the requirement of the kind of practical application gas and flow and plasma jet flow field parameter, extend the range of application of this generator.
Accompanying drawing explanation
Fig. 1 anode is the arc plasma generator structural representation of constraint and expansion structure passage;
Fig. 2 anode is the arc plasma generator structural representation of constraint-expansion-contraction structure passage;
Fig. 3 interlude is the arc plasma generator structural representation of constraint and expansion structure passage.
Embodiment
Basic thought of the present invention is the state making electric arc namely be separated into lower current densities in away from the passage of anode surface, namely makes arcing gas expand.From the arc channel configuration aspects of generator, electric arc flowed through the confined channel of minor diameter and impels the expansion structure passage of electric arc expansion before attaching anode, electric arc expansion, reduce the current density of electric arc in electrode surface adhesion zone, thus reduction electrode erosion, the expansion half-angle of pneumatic expansion structure passage is within 45 degree.
Fig. 1 and 2 provides arc plasma generator, comprises negative electrode 1, and retrains and expansion structure passage 2, and constraint and expansion structure passage 2 are also anode simultaneously.
It is arranged on described negative electrode downstream along electric arc transmission direction, electric arc is reduced by this passage after-current density, can not again gather for high current density state, reduce electrode erosion.
The expansion structure that Fig. 1 Anodic 2 is open, and Fig. 2 Anodic is with the constricted channel structure in adjustment plasma jet flow field, is constraint-expansion-contraction structure.
Fig. 3 gives arc plasma generator and comprises negative electrode 1, interlude 3, insulating part 4, anode 2.Interlude 3 is constraint and expansion structure passage, and suspending along electric arc transmission direction is installed on negative electrode 1 downstream, sets gradually insulating segment 4 and anode 2.Electric arc produces from negative electrode 1, and electric arc, along with high energy electron is toward the transmission of anode 2 direction, spreads when the expansion structure by interlude 3, and when making electric arc attach to anode 2 surface, current density reduces, thus the ablation of reduction electric arc antianode.
Adopt arc plasma generator to test as shown in Figure 1 in experiment, the pressure reduction between the downstream of generator upstream inlet end and anode export is comparatively large, is also Diffusive arc root (electric arc dispersion) under argon nitrogen hybrid working gas condition.Under this structural condition, arc plasma generator runs hundreds of hours, and anode does not occur obvious ablation phenomen yet, higher than gathering arc root condition electrode life of lower hundred hours.
The structure of concrete generator, can according to power, produce the gaseous species of electric arc, the service conditions such as balance generator architecture and size, plenum system, throughput, pressure differential between generator gas access and outlet.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. disperse electric arc to improve the method in generator life-span, it is characterized in that, comprise the steps:
A, external voltage excite between negative electrode and anode and produce electric arc;
B, electric arc move from negative electrode anode direction, through Planar Mechanisms and expansion structure passage, make electric arc expand dispersion thus reduce arc current density;
C, electric arc arc-root attachment anode.
2. method according to claim 1, is characterized in that, the expansion of described constraint and expansion structure passage can be taper, or streamlined, or cross section sudden expansion structure.
3. an arc plasma generator, is characterized in that, comprising:
Negative electrode;
Anode, after electric arc transmission direction is arranged on described negative electrode;
Constraint and expansion structure passage, be arranged between described negative electrode and anode, expanding dispersion thus reducing arc current density, reducing electrode erosion during electric arc docile anode for making electric arc.
4. generator according to claim 3, is characterized in that, described constraint and expansion structure passage are positioned at anode, and namely anode is constraint and expansion structure passage simultaneously.
5. generator according to claim 3, is characterized in that, described anode is open expansion structure.
6. generator according to claim 3, is characterized in that, described anode is the constricted channel structure with adjustment plasma jet flow field.
7. generator according to claim 3, is characterized in that, described constraint and expansion structure passage are interlude.
8. generator according to claim 7, is characterized in that, described interlude is installed for suspending.
9. the generator according to claim 7 or 8, is characterized in that, also comprises insulating part, is arranged between described interlude and described anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510727872.2A CN105228329A (en) | 2015-10-30 | 2015-10-30 | A kind of method and arc plasma generator disperseing the electric arc raising generator life-span |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510727872.2A CN105228329A (en) | 2015-10-30 | 2015-10-30 | A kind of method and arc plasma generator disperseing the electric arc raising generator life-span |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105228329A true CN105228329A (en) | 2016-01-06 |
Family
ID=54996923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510727872.2A Pending CN105228329A (en) | 2015-10-30 | 2015-10-30 | A kind of method and arc plasma generator disperseing the electric arc raising generator life-span |
Country Status (1)
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| CN (1) | CN105228329A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113438792A (en) * | 2021-06-18 | 2021-09-24 | 北京京仪自动化装备技术股份有限公司 | Intelligent controllable plasma flame device |
| CN113905498A (en) * | 2021-08-31 | 2022-01-07 | 中国航天空气动力技术研究院 | Arc plasma heater with dispersed cathode arc roots and use method |
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| US3803380A (en) * | 1972-03-16 | 1974-04-09 | Bbc Brown Boveri & Cie | Plasma-spray burner and process for operating the same |
| CN2568314Y (en) * | 2002-08-13 | 2003-08-27 | 高阳 | Nozzle for plasma blast gun |
| CN1589088A (en) * | 2004-07-23 | 2005-03-02 | 大连海事大学 | Double anode heat plasma generator |
| CN101954324A (en) * | 2010-09-19 | 2011-01-26 | 大连海事大学 | Plasma spray gun used for low-pressure plasma spraying |
| CN201809430U (en) * | 2010-10-14 | 2011-04-27 | 江苏中矿大正表面工程技术有限公司 | Laval nozzle for arc pistol |
| CN103269558A (en) * | 2013-06-05 | 2013-08-28 | 南京理工大学 | Anode of supersonic plasma torch, and supersonic plasma torch |
-
2015
- 2015-10-30 CN CN201510727872.2A patent/CN105228329A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3803380A (en) * | 1972-03-16 | 1974-04-09 | Bbc Brown Boveri & Cie | Plasma-spray burner and process for operating the same |
| CN2568314Y (en) * | 2002-08-13 | 2003-08-27 | 高阳 | Nozzle for plasma blast gun |
| CN1589088A (en) * | 2004-07-23 | 2005-03-02 | 大连海事大学 | Double anode heat plasma generator |
| CN101954324A (en) * | 2010-09-19 | 2011-01-26 | 大连海事大学 | Plasma spray gun used for low-pressure plasma spraying |
| CN201809430U (en) * | 2010-10-14 | 2011-04-27 | 江苏中矿大正表面工程技术有限公司 | Laval nozzle for arc pistol |
| CN103269558A (en) * | 2013-06-05 | 2013-08-28 | 南京理工大学 | Anode of supersonic plasma torch, and supersonic plasma torch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113438792A (en) * | 2021-06-18 | 2021-09-24 | 北京京仪自动化装备技术股份有限公司 | Intelligent controllable plasma flame device |
| CN113905498A (en) * | 2021-08-31 | 2022-01-07 | 中国航天空气动力技术研究院 | Arc plasma heater with dispersed cathode arc roots and use method |
| CN113905498B (en) * | 2021-08-31 | 2024-04-09 | 中国航天空气动力技术研究院 | Arc plasma heater with dispersed cathode arc roots and use method |
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Application publication date: 20160106 |