CN115734449B - Plasma arc generator for fixing arc generation position - Google Patents
Plasma arc generator for fixing arc generation position Download PDFInfo
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- CN115734449B CN115734449B CN202211510460.XA CN202211510460A CN115734449B CN 115734449 B CN115734449 B CN 115734449B CN 202211510460 A CN202211510460 A CN 202211510460A CN 115734449 B CN115734449 B CN 115734449B
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- 238000007599 discharging Methods 0.000 claims 5
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
A plasma arc generator for fixing the generation position of an arc relates to the plasma arc generator, and aims to solve the problems that the generation position of the plasma arc is not fixed and the arc is not easy to observe due to unreasonable structures of a cathode and an anode of the existing plasma arc generator. The invention comprises an anode and a cathode which are coaxially arranged, wherein the anode is in a circular tube shape, the cathode is positioned in the anode, a first discharge structure is arranged at the end part of the anode, the cathode comprises a cathode rod and a cathode head, the cathode head is positioned at the end part of the cathode rod, the cathode head is used as a second discharge structure, the second discharge structure is provided with an outwards-protruding tip, and the tip faces the first discharge structure. The invention can fix the generating position of the plasma arc at the tip of the cathode, greatly facilitates the observation and measurement of the arc in scientific research and has strong practical value.
Description
Technical Field
The present invention relates to plasma arc generators.
Background
The plasma ignition technology is a more advanced ignition technology developed on the basis of the pre-burning torch ignition technology, and has the advantages of high ignition reliability, short delay time and wide ignition boundary. The function of the plasma ignition system is to achieve the purpose of accelerating and enhancing combustion by applying external energy (e.g., electric field, magnetic field, high temperature, etc.) to decompose the air-fuel mixture in the combustion chamber of the gas turbine into a plasma (i.e., fourth state of matter present) thermal jet. The plasma arc generator in the common plasma ignition system is of a coaxial cylinder structure, the outer cylinder is an anode, the inner cylinder is a cathode, and when the voltage applied between the cathode and the anode is greater than the breakdown voltage of a medium between the cathode and the anode, the plasma arc generator breaks down to generate a plasma arc.
Plasma ignition systems are often used in gas turbines, scramjet internal combustion engines, and the like, and in order to improve the performance of gas turbines, scramjet internal combustion engines, and the like, it is often necessary to observe and measure the plasma arc generated by a plasma arc generator. However, the cathode and the anode of the plasma generator are in a coaxial cylindrical structure, and the distances from any two points on the surface of the cathode to the anode are equal, so that the plasma arc generation positions are random, and therefore, the structure of the plasma generator is quite unfavorable for arc observation.
Disclosure of Invention
To this end, the present invention provides a plasma arc generator with a fixed arc generation position in an attempt to solve or at least alleviate at least one of the problems presented above.
The invention discloses a plasma arc generator for fixing an arc generating position, which comprises an anode and a cathode which are coaxially arranged, wherein the anode is in a circular tube shape, the cathode is positioned in the anode, a first discharge structure is arranged at the end part of the anode, the cathode comprises a cathode rod and a cathode head, the cathode head is positioned at the end part of the cathode rod, the cathode head is used as a second discharge structure, the second discharge structure is provided with an outwards protruding tip, and the tip faces the first discharge structure.
Optionally, in a fixed arc generating position plasma arc generator according to the present invention, the first discharge structure is distributed over the circumference of the anode end.
Optionally, in a plasma arc generator according to the present invention, the cathode head is a droplet-shaped structure, and a tail of the droplet-shaped structure is directed toward the first discharge structure.
Alternatively, in a fixed arc generating position plasma arc generator according to the present invention, the cathode head is detachably connected to the cathode rod.
Alternatively, in a fixed arc generating position plasma arc generator according to the present invention, the cathode head and the cathode rod are connected by screw threads.
Optionally, in a plasma arc generator according to the present invention, the first discharge structure is convex to the inner side.
Optionally, in a fixed arc generating position plasma arc generator according to the present invention, the first discharge structure is detachably connected to the anode.
The plasma arc generator with fixed arc generating position according to the invention can realize at least one of the following beneficial effects: the plasma arc detection device can fix the generation position of the plasma arc at the tip of the cathode, greatly facilitates the observation and measurement of the arc during scientific research, and has strong practical value. In addition, the plasma arc generator with fixed arc generating position of the invention only makes small change to the existing plasma arc generator, and has simple installation, stable structure and low processing cost.
Drawings
To the accomplishment of the foregoing and related ends, certain illustrative aspects are described herein in connection with the following description and the annexed drawings, which set forth the various ways in which the principles disclosed herein may be practiced, and all aspects and equivalents thereof are intended to fall within the scope of the claimed subject matter. The above, as well as additional objects, features, and advantages of the present disclosure will become more apparent from the following detailed description when read in conjunction with the accompanying drawings. Like reference numerals generally refer to like parts or elements throughout the present disclosure.
FIG. 1 shows a schematic external configuration of a plasma arc generator with a fixed arc generation position according to one embodiment of the present invention;
FIG. 2 shows a schematic internal structure of a plasma arc generator with a fixed arc generation position according to an embodiment of the present invention;
fig. 3 shows a schematic structural view of a cathode head according to an embodiment of the present invention, wherein (a) is a schematic structural view of the outside of the cathode head, and (b) is an axial sectional view of the cathode head;
fig. 4 shows a schematic structural view of a cathode rod according to an embodiment of the present invention, wherein (a) is a schematic structural view of an outer portion of the cathode rod and (b) is an axial sectional view of the cathode rod;
fig. 5 shows an axial cross-section of a first discharge structure according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Aiming at the problems that the existing plasma arc generator is unfavorable for observing the arc because the generating position of the plasma arc is not fixed due to the unreasonable structure of the cathode and the anode, the invention provides the novel plasma arc generator which can fix the generating position of the arc and is convenient for observing the arc in the scientific test process.
Fig. 1 is a schematic view showing an external structure of a plasma arc generator for fixing an arc generation position according to an embodiment of the present invention, and fig. 2 is a schematic view showing an internal structure of the plasma arc generator of fig. 1.
As shown in fig. 1 and 2, an anode 1 and a cathode 2 which are coaxially arranged are included for fixing an arc generating position, wherein the anode 1 is a metal round tube, the cathode 2 is a metal cylinder, and the cathode 2 is positioned inside the anode 1. The top of the anode 1 is a first discharge structure 11. The cathode 2 includes a cathode stem 21 and a cathode head 22 as a second discharge structure, the cathode head 22 being located at the top end of the cathode stem 21, the cathode head 22 being provided with a tip 221 protruding outward, and the tip 221 being directed toward the first discharge structure 11.
In use, the plasma arc generator described above has the cathode 2 centrally located on the anode 1 with the cathode head 22 flush with the first discharge structure 11. Then, the anode 1 is grounded, the cathode 2 is connected to a negative high voltage, and an electric field is formed between the cathode head 22 and the first discharge structure 11. Since only the point located at the tip 221 among the points on the outer surface of the cathode head 22 is closest to the first discharge structure 11 (it should be noted that the distance from the point on the cathode head 22 to the first discharge structure 11 refers to the minimum distance from the point on the cathode head 22 to the first discharge structure 11, because the arc must be generated between the two points with the shortest distance), the plasma arc 3 occurs between the tip 221 and the first discharge structure 11 (one end of the plasma arc 3 is at the tip 221, and the other end of the plasma arc 3 falls on the first discharge structure 11 at the position closest to the tip 221), as shown in fig. 3, that is, the occurrence position of the plasma arc 3 is fixed at the tip 221.
As a preferred embodiment of the present invention, the first discharge structures 11 are distributed over the circumference of the end of the anode 1. As shown in fig. 1, the entire circumference of the top end of the anode 1 serves as the first discharge structure 11, and the occurrence position of the arc 3 on the cathode 2 is fixed at the tip 221 regardless of the position of the tip 221 of the cathode 2 toward the top end of the anode 1 when the electrode is mounted.
The tip 221 of the cathode head 22 may in principle be a tip of various shapes, as long as it is ensured that the distance from the tip to the first discharge structure 11 is shorter than the distance from other locations on the cathode head 22 to the first discharge structure 11.
For example, the cathode head 22 may be a wire or a thin metal rod, one end of which is fixed to the top end of the cathode 2, and the central axis of which is perpendicular to the central axis of the anode 1.
As a preferred embodiment of the present invention, the cathode head 22 may be manufactured in a drop-like structure, as shown in fig. 1 and 2. Here, the water droplet shape means the shape of the cross section of the cathode head 22. The tail of the droplet-like structure serves as a tip of the arc-generating position in the second discharge structure.
The cathode head 22 and the cathode rod 21 may be an integral piece or a split structure. The split structure is convenient to install, and processing difficulty and processing cost are reduced. For example, the cathode head 22 and the cathode rod 21 may be connected by screw threads, a threaded hole is formed in the center of the cathode head 22, as shown in fig. 3, one end of the cathode rod 21 is externally threaded, as shown in fig. 4, and the direction of the tip 221 may be adjusted by rotating the cathode head 22 during installation.
As a preferred embodiment of the present invention, the first discharge structure 11 may be processed into a circular stepped structure as shown in fig. 2, and fig. 5 shows an axial sectional view of the circular stepped structure, and as can be seen from fig. 5, a radial sectional view of the circular stepped structure is trapezoidal. The circular step structure can define the discharge position in the axial direction, and the tip 221 can define the discharge position in the circumferential direction, and the discharge position can be fixed by the cooperation of the circular step structure and the tip 221.
Further, the first discharge structure 11 and the anode 1 may be formed as a single piece or may be formed as a separate piece. When the split structure is adopted, the two can be fixed in a threaded mode, and the external thread of the first discharge structure 11 is matched with the internal thread of the metal round tube, or the internal thread of the first discharge structure 11 is matched with the external thread of the metal round tube.
Further, in the present embodiment, the position where the arc is generated mainly depends on the tip 221 of the cathode 2, and thus, the first discharge structure 11 may not necessarily be a completed circular step structure shown in fig. 2, and may be, for example, a part of a circular step shown in fig. 2. It should be noted that if the first discharge structure 11 is a part of the circular step shown in fig. 2, the orientation of the tip 221 of the cathode head 22 must be adjustable, for example, the connection between the cathode head 22 and the cathode rod 21 is shown in fig. 3 and 4, so as to adjust the orientation of the tip 221 of the cathode head 22 to the angle of the first discharge structure 11.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim.
Those skilled in the art will appreciate that two or more features of the embodiments may be combined into one feature and further that they may be separated into multiple features. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. As used herein, unless otherwise specified the use of the ordinal terms "first," "second," "third," etc., to describe a general object merely denote different instances of like objects, and are not intended to imply that the objects so described must have a given order, either temporally, spatially, in ranking, or in any other manner.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of the above description, will appreciate that other embodiments are contemplated within the scope of the invention as described herein. Furthermore, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter.
Claims (5)
1. The plasma arc generator for fixing the arc generating position comprises an anode and a cathode which are coaxially arranged, wherein the anode is in a circular tube shape, the cathode is positioned in the anode, a first discharge structure is arranged at the end part of the anode,
the cathode comprises a cathode rod and a cathode head, the cathode head is positioned at the end part of the cathode rod, the cathode head is used as a second discharging structure, the cathode head and the cathode rod are detachably connected, the cathode head and the cathode rod are connected through threads, the second discharging structure is provided with an outwards protruding tip, the tip faces the first discharging structure, and the second discharging structure is flush with the first discharging structure.
2. The plasma arc generator of claim 1 wherein the first discharge structure is disposed around the circumference of the anode end.
3. The plasma arc generator of claim 1 or 2 wherein the cathode head is a droplet-like structure and a tail of the droplet-like structure is directed toward the first discharge structure.
4. The plasma arc generator of claim 1 wherein the first discharge structure is inwardly convex.
5. The plasma arc generator of claim 1 wherein the first discharge structure is removably connected to the anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211510460.XA CN115734449B (en) | 2022-11-29 | 2022-11-29 | Plasma arc generator for fixing arc generation position |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211510460.XA CN115734449B (en) | 2022-11-29 | 2022-11-29 | Plasma arc generator for fixing arc generation position |
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| CN115734449A CN115734449A (en) | 2023-03-03 |
| CN115734449B true CN115734449B (en) | 2023-11-14 |
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| CN202211510460.XA Active CN115734449B (en) | 2022-11-29 | 2022-11-29 | Plasma arc generator for fixing arc generation position |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116581627B (en) * | 2023-07-12 | 2023-09-15 | 吉林省永利激光科技有限公司 | Gas laser |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4958057A (en) * | 1988-04-26 | 1990-09-18 | Nippon Steel Corporation | Transfer-type plasma torch with ring-shaped cathode and with processing gas passage provide interiorly of the cathode |
| EP0634887A1 (en) * | 1993-07-15 | 1995-01-18 | Soudure Assistance | Transferred arc plasma torch |
| DE19930925A1 (en) * | 1998-07-06 | 2000-05-25 | Laure Stefan | Plasma generator has annular or tubular cathode mounted coaxially wrt. anode and open on both sides of its annular or tubular body; axial opening of cathode is adjustable |
| US6114649A (en) * | 1999-07-13 | 2000-09-05 | Duran Technologies Inc. | Anode electrode for plasmatron structure |
| JP2002299099A (en) * | 2001-03-29 | 2002-10-11 | Yamada Kinzoku Boshoku Kk | Generator and generation method of plasma arc |
| US6548959B1 (en) * | 1998-03-20 | 2003-04-15 | Hamamatsu Photonics K.K. | Discharge tube with substantially exposed cathode tip portion for use as a light source |
| CN1777347A (en) * | 2005-11-24 | 2006-05-24 | 南京航空航天大学 | Corona coupling medium discharge-blocking device for generating low-temperature plasma |
| CN103200758A (en) * | 2010-10-04 | 2013-07-10 | 衢州市广源生活垃圾液化技术研究所 | Arc plasma device |
| CN111511462A (en) * | 2017-09-01 | 2020-08-07 | 索尼奥环球控股有限责任公司 | Free radical generator and method of use |
| CN111947151A (en) * | 2020-08-07 | 2020-11-17 | 合肥中科远望环保科技有限公司 | Gas composite plasma torch |
| WO2021245667A1 (en) * | 2020-06-04 | 2021-12-09 | Innohale Therapeutics Ltd. | Plasma generation system |
| CN114001003A (en) * | 2021-10-26 | 2022-02-01 | 北京理工大学 | Double-section coaxial toothed cathode pulse plasma thruster |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150040829A1 (en) * | 2013-08-12 | 2015-02-12 | Applied Materials, Inc. | Multizone hollow cathode discharge system with coaxial and azimuthal symmetry and with consistent central trigger |
| EP3443579B1 (en) * | 2016-05-02 | 2021-03-17 | MKS Instruments, Inc. | Cold cathode ionization vacuum gauge with multiple cathodes |
| WO2018045378A1 (en) * | 2016-09-02 | 2018-03-08 | Somnio Global Holdings, Llc | Free radical generation device and methods thereof |
| US11246955B2 (en) * | 2018-10-29 | 2022-02-15 | Phoenixaire, Llc | Method and system for generating non-thermal plasma |
-
2022
- 2022-11-29 CN CN202211510460.XA patent/CN115734449B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4958057A (en) * | 1988-04-26 | 1990-09-18 | Nippon Steel Corporation | Transfer-type plasma torch with ring-shaped cathode and with processing gas passage provide interiorly of the cathode |
| EP0634887A1 (en) * | 1993-07-15 | 1995-01-18 | Soudure Assistance | Transferred arc plasma torch |
| US6548959B1 (en) * | 1998-03-20 | 2003-04-15 | Hamamatsu Photonics K.K. | Discharge tube with substantially exposed cathode tip portion for use as a light source |
| DE19930925A1 (en) * | 1998-07-06 | 2000-05-25 | Laure Stefan | Plasma generator has annular or tubular cathode mounted coaxially wrt. anode and open on both sides of its annular or tubular body; axial opening of cathode is adjustable |
| US6114649A (en) * | 1999-07-13 | 2000-09-05 | Duran Technologies Inc. | Anode electrode for plasmatron structure |
| JP2002299099A (en) * | 2001-03-29 | 2002-10-11 | Yamada Kinzoku Boshoku Kk | Generator and generation method of plasma arc |
| CN1777347A (en) * | 2005-11-24 | 2006-05-24 | 南京航空航天大学 | Corona coupling medium discharge-blocking device for generating low-temperature plasma |
| CN103200758A (en) * | 2010-10-04 | 2013-07-10 | 衢州市广源生活垃圾液化技术研究所 | Arc plasma device |
| CN111511462A (en) * | 2017-09-01 | 2020-08-07 | 索尼奥环球控股有限责任公司 | Free radical generator and method of use |
| WO2021245667A1 (en) * | 2020-06-04 | 2021-12-09 | Innohale Therapeutics Ltd. | Plasma generation system |
| CN111947151A (en) * | 2020-08-07 | 2020-11-17 | 合肥中科远望环保科技有限公司 | Gas composite plasma torch |
| CN114001003A (en) * | 2021-10-26 | 2022-02-01 | 北京理工大学 | Double-section coaxial toothed cathode pulse plasma thruster |
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| CN115734449A (en) | 2023-03-03 |
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