CN104023461A - Spark discharge self-excitation jet plasma generating device - Google Patents
Spark discharge self-excitation jet plasma generating device Download PDFInfo
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- CN104023461A CN104023461A CN201410225853.5A CN201410225853A CN104023461A CN 104023461 A CN104023461 A CN 104023461A CN 201410225853 A CN201410225853 A CN 201410225853A CN 104023461 A CN104023461 A CN 104023461A
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Abstract
The invention discloses a spark discharge self-excitation jet plasma generating device which comprises at least one miniature discharge chamber. The discharge chamber is provided with one jet hole. The spark discharge self-excitation jet plasma generating device is characterized in that: the spark discharge self-excitation jet plasma generating device generates charged particles through applying a pulse high voltage and creating spark discharge in the miniature discharge chamber; and furthermore under the function of the air pressure which instantly increase in the discharge chamber, plasma is jet from a jet hole of the discharge chamber. According to the spark discharge self-excitation jet plasma generating device, the spark discharge manner is adopted. On condition that no outer blowing air exists, the plasma which is jet in high speed is generated under the function of the air pressure which increases instantly. The spark discharge self-excitation jet plasma generating device has high jet speed and high activity of the plasma and can be used for common-pressure and high-pressure environments because of adoption of the spark discharge manner, relatively high applied pulse voltage and relatively high obtained initial energy of the plasma.
Description
Technical field
The present invention relates to jet plasma generation device technical field, particularly a kind of sparkover autoexcitation high velocity jet plasma generating device.
Background technology
Atmospheric pressure plasma jet is the current study hotspot in plasma application field in the world.Because it can electric discharge only produces plasma in discharging gap at open space rather than as tradition, it is had a wide range of applications in the various fields such as material surface modifying, food storage, waste gas waste water treatment especially biomedical aspect.
At present, atmospheric pressure plasma jet generating device mainly adopts dielectric barrier discharge (Dielectric Barrier Discharge, DBD), the form of class dielectric barrier discharge (DBD-like) and single electrode discharge, by the mode of blowing, the plasma of discharge generation is taken away to discharging gap and forms plasma jet.Working gas mainly comprises inert gas (as helium, argon gas), nitrogen and air etc., and the length of jet is from several mm to tens cm, and the gas temperature of jet is from hundreds of ℃ to normal temperature.But all there is following problem in these several plasma jet generating devices: the one, need outside air blowing, and apparatus structure is complicated, and volume is large, carries inconvenience; The 2nd, apply voltage lower, the plasma jet speed of generation is little, active low.
Summary of the invention
For solving the above-mentioned one or more technical problems that exist in prior art, the invention discloses a kind of sparkover autoexcitation jet plasma generation device, described device comprises at least one miniature discharge cavity, described discharge cavity is provided with a spray orifice, it is characterized in that, described device is by applying high voltage pulse flashing discharge generation charged particle in miniature discharge cavity, and under the gas pressure that moment raises in described discharge cavity, from the spray orifice jet plasma of discharge cavity.
This device adopts the form of sparkover, can be not having under outside condition of blowing, produce the plasma of high velocity jet under the effect of the air pressure that raises in moment.Described jet plasma generation device, owing to adopting the form of sparkover, applies pulse voltage higher, and the primary power that plasma obtains is larger, causes plasma jet speed large, active high, applicable to normal pressure, hyperbaric environment.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
Fig. 1 is the integral installation figure of the jet plasma generation device illustrated of one embodiment of the present of invention.
In figure, 1. plate electrode, 2. ring electrode, 3. pin electrode, 4. macromolecular compound dead ring, 5. spray-hole, 6. miniature discharge cavity, 7. screw, is 8. screw corresponding with 7.
Embodiment
Below, be described with reference to the accompanying drawings the realization of a kind of sparkover autoexcitation of the present invention jet plasma generation device.
In one embodiment, the invention discloses a kind of sparkover autoexcitation jet plasma generation device, described device comprises at least one miniature discharge cavity, described discharge cavity is provided with a spray orifice, described device is by applying high voltage pulse flashing discharge generation charged particle in miniature discharge cavity, and under the gas pressure that moment raises in described discharge cavity, from the spray orifice jet plasma of discharge cavity.
With regard to above-described embodiment, by applying high voltage pulse, cause sparkover, discharge a large amount of gas molecules, guiding discharge chamber internal gas pressure sharply raises, under the effect of air pressure, plasma is taken away to discharge cavity, form jet plasma, thereby do not need outside air blowing.Meanwhile, the inner form that adopts sparkover of discharge cavity, has improved the discharge voltage in gap, makes the jet plasma producing obtain larger primary power, and development speed is large, active high.
In another embodiment, described a large amount of charged particles also, under the effect of the electric field of local enhancement, further accelerate the jet velocity of described plasma.Like this, compare with previous embodiment, increased the restriction ability of additional enhancing electric field.
In another embodiment, the gas medium of described device is arbitrary in following three kinds of gases or it mixes arbitrarily: air, N
2, SF
6.Mixing can be wherein to mix between two arbitrarily, can be also that three mixes, and can be also different mixing proportion.Further, described device can be operated in normal pressure (referring to air pressure) environment, also can be operated in hyperbaric environment.
In another embodiment, as shown in Figure 1, this jet plasma generation device, comprise top plate electrode (1), lower floor's macromolecular compound dead ring (4) and pin electrode (3), described discharge cavity has a spray orifice, and described device is from the spray orifice jet plasma of discharge cavity; And: described spray orifice is positioned at upper strata, the plate electrode that upper strata is ground connection, lower floor is that cylindrical shape macromolecular compound dead ring and lower floor are sealed and installed with the pin electrode over against spray orifice; Described device discharges flashing in miniature discharge cavity by apply high voltage pulse at pin electrode place.
For this embodiment, in discharge cavity, electric discharge is carried out along dead ring surface between pin electrode and plate electrode, due to the sparkover in this miniature discharge cavity, make wherein to discharge a large amount of gas molecules, guiding discharge chamber internal gas pressure sharply raises, and under the effect of air pressure, plasma is taken away to discharge cavity, forms jet plasma, thereby do not need outside air blowing, simplified apparatus structure.
Preferably, described upper and lower two-layer fastening by metal bolts.
Preferably, in another embodiment, plate electrode is circular plate type structure.Hold intelligiblely, plate electrode can be also other regular polygons.
Preferred, at the geometric center place of described plate electrode, offer described spray orifice.Preferred, described spray orifice is truncated cone-shaped.Preferred, described round platform is little near plate electrode surface one side diameter, large near pin electrode one side diameter.Preferred, the bus of described round platform becomes miter angle with bottom surface.
In addition, near plate electrode outside, can be uniformly distributed the position, hole of some screws (7) or other types of attachment, to be connected with macromolecular compound dead ring.Screw, corresponding if, and described macromolecular compound dead ring is evenly distributed with some corresponding screws (8) near outside, and tighten together with plate electrode by dormant bolt.Preferably, dead ring center arranges described miniature discharge cavity (6), and miniature discharge cavity is cylindrical shape, and discharge cavity bottom is used for sealing installs pin electrode (3), such as adopting mounting means or other mounting meanss of screw.
In another embodiment, discharge cavity outside has a toroidal cavity, for installing ring electrode (2).
For this embodiment, the design of ring electrode makes to exist between pin electrode and ring electrode extra electric field component, there is additional electric field, greatly strengthened the internal field of pin electrode tip and plate electrode spray orifice, plasma is further accelerated in discharge cavity.Preferably, the center of circle of at least one circular cross-section of described ring electrode is between spray orifice and pin electrode, and the tip of the described center of circle and pin electrode is positioned at same straight line.So both guarantee the symmetry of structure, and can guarantee again the further acceleration of described additional internal field's plasma.
Preferably, described pin electrode is tightly connected by screw thread or other connected modes and dead ring.
In the present invention, plate electrode and ring electrode can be selected stainless steel metal material, and pin electrode can be selected brass metal material; Macromolecular compound dead ring can be selected polytetrafluoroethylene or polyimides or other insulating polymeric materials.
The working gas medium of jet plasma generation device of the present invention can select arbitrary in following three kinds of gases or its to mix arbitrarily: air (better with pure air), N
2, SF
6.
In another embodiment, relate to the extended structure of device, for practical range of the present invention is described: described device, miniature discharge cavity can be a plurality of, corresponding, ring electrode, pin electrode can be also a plurality of naturally.
In addition, the quantity of spray orifice can increase and decrease arbitrarily, and corresponding jet plasma produces number and also changes thereupon.
Above-described embodiment that the present invention provides is only for the present invention is described, but is not limited to practical range of the present invention, and the content that every technical solution of the present invention limits all belongs to protection scope of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a sparkover autoexcitation jet plasma generation device, described device comprises at least one miniature discharge cavity, described discharge cavity is provided with a spray orifice, it is characterized in that, described device is by applying high voltage pulse flashing discharge generation charged particle in miniature discharge cavity, and under the gas pressure that moment raises in described discharge cavity, from the spray orifice jet plasma of discharge cavity.
2. device according to claim 1, is characterized in that: described charged particle also, under the effect of the electric field of local enhancement, further accelerates the jet velocity of described plasma.
3. device according to claim 1, is characterized in that: the gas medium of described device is arbitrary in following three kinds of gases or it mixes arbitrarily: air, N
2, SF
6.
4. according to the arbitrary described device of claims 1 to 3, described device comprises that at least one has the miniature discharge cavity of spray orifice, and described device, from the spray orifice jet plasma of discharge cavity, is characterized in that:
Described discharge cavity comprises the two-layer of contact up and down, and described spray orifice is positioned at upper strata, the plate electrode that upper strata is ground connection, and lower floor is that cylindrical shape macromolecular compound dead ring and lower floor are sealed and installed with the pin electrode over against spray orifice;
Described device discharges flashing in miniature discharge cavity by apply high voltage pulse at pin electrode place.
5. device according to claim 4, is characterized in that: the outside of described discharge cavity has a toroidal cavity, and described device also comprises the ring electrode that at least one is connected with plate electrode, and ring electrode is cylindrical shape and embeds described toroidal cavity.
6. device according to claim 4, is characterized in that: described spray orifice is a frustum cone structure, and described round platform is little near plate electrode surface one side diameter, large near pin electrode one side diameter.
7. device according to claim 4, is characterized in that: described upper and lower two-layer fastening by metal bolts.
8. device according to claim 4, is characterized in that: described plate electrode and ring electrode are selected stainless steel metal material, and pin electrode is selected brass metal material; Macromolecular compound dead ring is selected polytetrafluoroethylene or polyimides or other insulating polymeric materials.
9. device according to claim 5, is characterized in that: the center of circle of at least one circular cross-section of described ring electrode is between spray orifice and pin electrode, and the tip of the described center of circle and pin electrode is positioned at same straight line.
10. device according to claim 6, is characterized in that: preferred, the bus of described round platform becomes miter angle with bottom surface.
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| CN201410225853.5A CN104023461A (en) | 2014-05-26 | 2014-05-26 | Spark discharge self-excitation jet plasma generating device |
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| CN201410225853.5A CN104023461A (en) | 2014-05-26 | 2014-05-26 | Spark discharge self-excitation jet plasma generating device |
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Cited By (5)
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|---|---|---|---|---|
| CN105873347A (en) * | 2016-05-12 | 2016-08-17 | 华中科技大学 | Plasma injection switch device |
| CN108463046A (en) * | 2018-05-04 | 2018-08-28 | 安徽工业大学 | Hand held air electric spark cold plasma shock wave fluidic device |
| CN110913555A (en) * | 2019-12-06 | 2020-03-24 | 西安交通大学 | Plasma jet switch |
| CN113747650A (en) * | 2021-08-30 | 2021-12-03 | 西安交通大学 | Micro-cavity discharge plasma jet device based on metal powder mixing |
| CN115235301A (en) * | 2022-07-09 | 2022-10-25 | 南京理工大学 | Ignition device and ignition method for low-power hollow cathode microplasma |
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| CN110913555A (en) * | 2019-12-06 | 2020-03-24 | 西安交通大学 | Plasma jet switch |
| CN113747650A (en) * | 2021-08-30 | 2021-12-03 | 西安交通大学 | Micro-cavity discharge plasma jet device based on metal powder mixing |
| CN115235301A (en) * | 2022-07-09 | 2022-10-25 | 南京理工大学 | Ignition device and ignition method for low-power hollow cathode microplasma |
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Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20141106 |
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Inventor after: Liu Xuandong Inventor after: Liu Shanhong Inventor after: Li Zhibing Inventor after: Yan Xianglian Inventor after: Zhang Qiaogen Inventor after: Tie Weihao Inventor before: Liu Xuandong Inventor before: Liu Shanhong Inventor before: Zhang Qiaogen Inventor before: Tie Weihao |
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Free format text: CORRECT: INVENTOR; FROM: LIU XUANDONG LIU SHANHONG ZHANG QIAOGEN TIE WEIHAO TO: LIU XUANDONG LIU SHANHONG LI ZHIBING YAN XIANGLIAN ZHANG QIAOGEN TIE WEIHAO |
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Effective date of registration: 20141106 Address after: 710049 Xianning West Road, Shaanxi, China, No. 28, No. Applicant after: Xi'an Jiaotong University Applicant after: China Electric Power Research Institute Address before: 710049 Xianning West Road, Shaanxi, China, No. 28, No. Applicant before: Xi'an Jiaotong University |
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Effective date of registration: 20151123 Address after: 710049 Xianning West Road, Shaanxi, China, No. 28, No. Applicant after: Xi'an Jiaotong University Applicant after: China Electric Power Research Institute Applicant after: State Grid Corporation of China Applicant after: State Grid Henan Electric Power Company Address before: 710049 Xianning West Road, Shaanxi, China, No. 28, No. Applicant before: Xi'an Jiaotong University Applicant before: China Electric Power Research Institute |
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Application publication date: 20140903 |