CN109673097A - A kind of air-cooled combination electrode plasma generator - Google Patents
A kind of air-cooled combination electrode plasma generator Download PDFInfo
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- CN109673097A CN109673097A CN201811538329.8A CN201811538329A CN109673097A CN 109673097 A CN109673097 A CN 109673097A CN 201811538329 A CN201811538329 A CN 201811538329A CN 109673097 A CN109673097 A CN 109673097A
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- plasma
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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
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
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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
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3431—Coaxial cylindrical electrodes
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Plasma Technology (AREA)
Abstract
A kind of air-cooled combination electrode plasma generator, it is characterized in that nested being formed by small-power plasma electrode and high powered plasma electrode are compound, high power plasma electrodes surrounding is in the outside of small-power plasma electrode, small-power plasma arc is first formed with high-frequency and high-voltage power supply, the plasma of formation will lead to the reduction of the resistance between high powered plasma generator cathode and anode, to light high powered plasma generator, since high powered plasma generator cathode is the hollow cathode using large area transmitting, with good thermal diffusivity and lower thermic load, with the longer service life.
Description
Technical field
The present invention relates to plasma generator field, especially a kind of multi-functional air-cooled plasma generator.
Background technique
Plasma generator is now widely used for the arc plasma igniting of pulverized-coal fired boiler, plasma cut is processed, etc.
From
The fields such as sub- spraying, surface modification, plasma engines, but the electrode of high powered plasma generator is generally used
Water cools down electrode, and structure is complicated for electrode, poor reliability.Traditional high powered plasma electrode operating temperature is high, due to using
Liquid is cooling, the job insecurity under low-power, it is easy to cause current interruption.In addition high powered plasma generator generally uses
300V-500V DC power supply needs the electrode gap of very little that can just successfully start up starting when arcing, be easy to cause short circuit or electricity
Pole ablation.And the plasma generator of cutting and welding, generally using high voltagehigh frequency power supply as generator power, work gas
Body issues raw ionization in high-frequency electromagnetic field action, generates plasma, has the characteristics that the starting the arc is easy, and does not need to carry out arcing,
The characteristics of high reliablity, but due to the limitation of system principle, can not accomplish high power.Whether high frequency plasma or low pressure
Arc plasma all haves the defects that the service life is obviously partially short, and electrode life is generally difficult more than 1000 hours.
Hollow cathode component main function is to provide electricity for electric propulsion engine igniting and neutralization engine electropositive plume
Son.Electric propulsion technology passes through years development, has been achieved for major progress.By six institute, China Aerospace Science and Technology Corporation, 801 institute
The plasma electric Push Technology of research and development, it is already possible to accomplish multikilowatt power and the service life more than 20000 hours.But
Since hollow cathode discharge plasma technology generallys use low pressure glow discharge as activated cathode, discharge capability is limited, leads to function
Rate improves difficulty, how to develop high-power, the Plasma propulsion system of long-life, is the key that exploitation plasma engines.
In common high powered plasma generator, such as in the plasma ignition system that uses of coal fired power plant, usually
It is lighted a fire by the way of contacting ignition arc, and cathode is cooled down using rotation Tangential Wind.Plasma hair in this way
Raw device will appear two serious problems, first contacting ignition arc will lead to electric discharge always happen it is nearest in cathode and anode distance
Point, these point of discharges work for a long time, it will lead to the very high damage of temperature, lead to next ignition difficulties；When using rotation
When Tangential Wind is cooling to cathodic discharge head, low-pressure area (cyclone principle), the stream of low-pressure area wind will form inside rotary wind
Not enough, the shortage of heat taken away causes cathode head center that can not cool down to amount, will lead to the cathode center Qu Xiangxuan of thawing instead
Wind low-pressure area splashes, to form hollow section on cathodic discharge head.
The present invention provides a kind of high power for solving plasma system, the problem method of long-life and using this principle
Plasma generator.
Summary of the invention
It is to use virtual cathode technique the object of the present invention is to provide the air-cooled plasma generator of long-life a kind of
It lights to realize with multistage.
A kind of air-cooled combination electrode plasma generator, principle are generated using high-frequency small power plasma generator
Virtual cathode of the plasma as high powered plasma generator, and hollow cathode principle is used, using cylindrical surface as plasma
Body launch point replaces traditional dotted-line style to emit, and improves total emission power, but reduce the transmission power of unit area, reaches
The temperature for reducing plasma launch point, promotes the service life of plasma generator, and eliminate the drawing of high powered plasma generator
Arc device and water cooling plant, to improve the reliability of system.
The present invention adopts the following technical solutions to realize.
According to above-mentioned combination electrode plasma lift-off technology principle, a kind of air-cooled combination electrode plasma generator is special
Sign be by small-power plasma electrode and high powered plasma electrode it is compound it is nested form, high power plasma electrodes surrounding
In the outside of small-power plasma electrode, small-power plasma arc, the plasma of formation are first formed with high-frequency and high-voltage power supply
Cognition causes the resistance between high powered plasma generator cathode and anode to reduce, to light high powered plasma
Device, due to high powered plasma generator cathode be using large area transmitting hollow cathode, have good thermal diffusivity and compared with
Low thermic load has the longer service life.
According to above-mentioned combination electrode plasma lift-off technology principle and feature, a kind of air-cooled combination electrode plasma generation
Device, by be grounded mounting bracket, shell, yin, yang electrode, and the insulator spacer three parts between electrode and shell
Composition.As shown in Figure 1, specifically including the mounting bracket 1 of hollow cylinder, and the primary air nozzle 2, two opened in mounting bracket
Secondary air port 3, high-frequency and high-voltage cathode 7 is mounted on the axle center of mounting bracket 1, and is dielectrically separated from by cathode isolation set 4 with mounting bracket
It opens, in the transmitting terminal periphery of high-voltage cathodes 7, dress is equipped with the normal voltage cathode 7 of hollow structure, and normal pressure cathode 7 has twin nuclei,
Wherein on high-voltage cathodes 7, exterior ring cap is embedded in anode separation sleeve 5 inner ring sleeve, is cooling wind channel between inner ring and outer rings.
On 5 one end of anode separation sleeve installation dress shell, the other end is combined closely with anode 9, and anode 9 and normal pressure cathode 6 are dielectrically separated from
It opens, anode 9 has flared structure, and cooling air outlet hole is provided at fan-shaped surface, and anode 9 is outer to be protected by protective casing 8.
Preferably, the high-voltage cathodes 7 are made of the graphite alkenes material of low electron emission energy.
Preferably, the cathode isolation set, anode separation sleeve are made of high-temperature insulation ceramics.
Preferably, the anode 9 is made of the good chromiumcopper of thermal conductivity.
Preferably, the normal pressure cathode 6 is made of Dual-drum structure, and inner cylinder length is less than outer cylinder.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is three kinds of operating mode schematic diagrames of the invention.
Fig. 3 is 9 structure chart of anode of the invention.
Fig. 4 is 6 structure chart of normal pressure cathode of the invention.
Specific embodiment
Principle according to the present invention, a kind of air-cooled combination electrode plasma generator example are as follows:
Example 1
As shown in Figure 1, a kind of air-cooled combination electrode plasma generator, specifically includes the mounting bracket 1 of hollow cylinder, and
Primary air nozzle 2, the overfiren air port 3 opened in mounting bracket, high-frequency and high-voltage cathode 7 are mounted on the axle center of mounting bracket 1, and by yin
Pole separation sleeve 4 is dielectrically separated from out with mounting bracket, normal voltage yin of the dress equipped with hollow structure in the transmitting terminal periphery of high-voltage cathodes 7
Pole 7, normal pressure cathode 7 have twin nuclei, and wherein on high-voltage cathodes 7, exterior ring cap is embedded in anode separation sleeve 5 inner ring sleeve,
It is cooling wind channel between inner ring and outer rings.On 5 one end of anode separation sleeve installation dress shell, the other end is combined closely with anode 9,
Anode 9 and normal pressure cathode 6 are dielectrically separated from out, anode 9 has flared structure, and cooling air outlet is provided at fan-shaped surface
Hole, anode 9 is outer to be protected by protective casing 8.
As shown in Fig. 2, protective casing good earth is needed, first in high pressure yin when plasma generator starts starting
Apply the high-frequency direct-current stamping voltage of 1KV-30KV on pole 7, frequency makes high-voltage cathodes 7 and normal pressure negative between 10KHZ-50KHZ
Discharge voltage is formed between pole 6, plasma-arc can be initially formed between high-voltage cathodes 7 and the inner cylinder of normal pressure cathode 6, and lead to
Enter suitable cold wind, the transfer for making the plasma arc to be formed stable, to allow plasma generator work in low-power mode.This
When, apply the DC voltage of 220 or 380V again on normal pressure cathode 6, allow the inner cylinder of normal pressure cathode 6 and anode 9 generate it is equal from
Subarc, and cooling monsoon intensity is adjusted, allow plasma-arc to stablize, plasma generator can work in middle power mode at this time；After
The continuous supply current for increasing normal pressure cathode, plasma resistance can reduce, it will normal pressure yin outer cylinder is caused to begin participating in electric discharge, shape
The electrical discharge arc of Cheng Xin, plasma generator power will increase, at this point, plasma generator work is in high power mode.Due to
Plasma generator at work, has cooling wind between normal pressure cathode inner/outer tube, normal pressure cathode can obtain good cold
But, cathode electrode temperature is lower, so having longer service life.
The foregoing describe basic principles and main features of the invention and advantages of the present invention.The technical staff of the industry answers
The understanding, the present invention is not limited to the above embodiments, and the above embodiments and description only describe of the invention former
A kind of applicable cases of reason only change component structure, quantity, shape, material without departing from the principle of the present invention
Matter, mounting means, size, the parameters such as move mode, these changes and improvements belong to the scope of the present invention.
Claims (7)
1. a kind of air-cooled combination electrode plasma generator, principle is generated using high-frequency small power plasma generator
Virtual cathode of the gas ions as high powered plasma generator, and hollow cathode principle is used, using cylindrical surface as plasma
Launch point replaces traditional dotted-line style to emit, and improves total emission power, but reduce the transmission power of unit area, reaches drop
The temperature of low emission of ions point, promotes the service life of plasma generator, and eliminate the arcing of high powered plasma generator
Device and water cooling plant, to improve the reliability of system.
2. a kind of according to claim 1, air-cooled combination electrode plasma generator, it is characterised in that by small-power plasma
Electrode and high powered plasma electrode it is compound it is nested form, high power plasma electrodes surrounding is in small-power plasma electrode
Outside, first forms small-power plasma arc with high-frequency and high-voltage power supply, and the plasma of formation will lead to high powered plasma
Resistance between generator cathode and anode reduces, so that high powered plasma generator is lighted, since high powered plasma is sent out
Raw device cathode is that have good thermal diffusivity and lower thermic load using the hollow cathode of large area transmitting, is had longer
Service life.
3. according to claim 1, described in 2, a kind of air-cooled combination electrode plasma generator, by be grounded mounting bracket, shell,
Yin, yang electrode, and the insulator spacer three parts composition between electrode and shell；As shown in Figure 1, specifically including sky
The mounting bracket 1 of heart cylinder, and primary air nozzle 2, the overfiren air port 3 opened in mounting bracket, high-frequency and high-voltage cathode 7 are installed
It is dielectrically separated from out in the axle center of mounting bracket 1, and by cathode isolation set 4 with mounting bracket, in the transmitting terminal periphery of high-voltage cathodes 7
Dress is equipped with the normal voltage cathode 7 of hollow structure, and normal pressure cathode 7 has twin nuclei, and wherein inner ring sleeve is on high-voltage cathodes 7, outside
Ring set is embedded in anode separation sleeve 5, is cooling wind channel between inner ring and outer rings；5 one end of anode separation sleeve installation dress shell
On, the other end is combined closely with anode 9, and anode 9 and normal pressure cathode 6 are dielectrically separated from out, and anode 9 has flared structure, and
Cooling air outlet hole is provided at fan-shaped surface, anode 9 is outer to be protected by protective casing 8.
4. according to claim 1, described in 2, the high-voltage cathodes 7 are made of the graphite alkenes material of low electron emission energy.
5. according to claim 1, described in 2, the cathode isolation set, anode separation sleeve are made of high-temperature insulation ceramics.
6. according to claim 1, described in 2, the anode 9 is made of the good chromiumcopper of thermal conductivity.
7. according to claim 1, described in 2, the normal pressure cathode 6 is made of Dual-drum structure, and inner cylinder length is less than outer cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811538329.8A CN109673097A (en) | 2018-12-16 | 2018-12-16 | A kind of air-cooled combination electrode plasma generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811538329.8A CN109673097A (en) | 2018-12-16 | 2018-12-16 | A kind of air-cooled combination electrode plasma generator |
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| CN109673097A true CN109673097A (en) | 2019-04-23 |
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| CN201811538329.8A Pending CN109673097A (en) | 2018-12-16 | 2018-12-16 | A kind of air-cooled combination electrode plasma generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114114878A (en) * | 2021-12-13 | 2022-03-01 | 维沃移动通信有限公司 | Dial structure and wearable equipment |
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2018
- 2018-12-16 CN CN201811538329.8A patent/CN109673097A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114114878A (en) * | 2021-12-13 | 2022-03-01 | 维沃移动通信有限公司 | Dial structure and wearable equipment |
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Application publication date: 20190423 |