CN115734449A - Plasma arc generator for fixing arc generation position - Google Patents
Plasma arc generator for fixing arc generation position Download PDFInfo
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- CN115734449A CN115734449A CN202211510460.XA CN202211510460A CN115734449A CN 115734449 A CN115734449 A CN 115734449A CN 202211510460 A CN202211510460 A CN 202211510460A CN 115734449 A CN115734449 A CN 115734449A
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- 238000007599 discharging Methods 0.000 claims description 7
- 238000010891 electric arc Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
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- 238000009434 installation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model provides a fixed arc position's plasma arc generator, relates to plasma arc generator, and the purpose is because negative and positive pole structure is unreasonable in order to solve current plasma arc generator, leads to the plasma arc position unfixed, is unfavorable for the problem of observing the electric arc. The cathode comprises a cathode and an anode 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 a tip which protrudes outwards, and the tip faces the first discharge structure. The invention can fix the generation 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 a plasma arc generator.
Background
The plasma ignition technology is a more advanced ignition technology developed on the basis of the pre-combustion torch ignition technology, and has the advantages of high ignition reliability, short delay time and wide ignition boundary. The plasma ignition system functions to accelerate and intensify combustion by applying external energy (e.g., electric field, magnetic field, high temperature, etc.) to partially decompose the air-fuel mixture in the combustion chamber of the gas turbine into plasma (i.e., fourth state of matter presence) thermal jets. The plasma arc generator in a common plasma ignition system is of a coaxial cylindrical structure, an outer cylinder is an anode, and an inner cylinder is a cathode, so that when voltage applied between the cathode and the anode is greater than breakdown voltage of a medium between the cathode and the anode, breakdown occurs to generate plasma arc.
The plasma ignition system is often applied to equipment such as a gas turbine and a scramjet internal combustion engine, and in order to improve the performance of the equipment such as the gas turbine and the scramjet internal combustion engine, the plasma arc generated by the plasma arc generator is often observed and measured. However, the cathode and the anode of the plasma generator are coaxial cylindrical structures, and the distances from any two points on the surface of the cathode to the anode are equal, so that the positions where plasma arcs occur are random, and the structure of the plasma generator is very unfavorable for arc observation.
Disclosure of Invention
To this end, the present invention provides a fixed arc generation location plasma arc generator in an effort to solve or at least alleviate at least one of the problems identified 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 discharging 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 second discharging structure is provided with a tip which protrudes outwards, and the tip faces the first discharging structure.
Alternatively, in a fixed arc location plasma arc generator according to the present invention, the first discharge structure is arranged to extend around the circumference of the anode end.
Alternatively, in a fixed arc position plasma arc generator according to the present invention, the cathode head is a droplet-shaped structure, and a tail portion of the droplet-shaped structure is directed to the first discharge structure.
Alternatively, in a fixed arc position plasma arc generator according to the present invention, the cathode head and the cathode rod are detachably connected.
Alternatively, in a fixed arc position plasma arc generator according to the present invention, the cathode head and the cathode rod are connected by a screw thread.
Alternatively, in a fixed arc generation position plasma arc generator according to the present invention, the first discharge structure is convex toward the inside.
Optionally, in a fixed arc generation location plasma arc generator according to the present invention, the first discharge structure is removably coupled to the anode.
According to the plasma arc generator for fixing the arc generation position, at least one of the following beneficial effects can be realized: the plasma arc generator can fix the generation 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. In addition, the plasma arc generator for fixing the arc generating position only makes minor changes on the existing plasma arc generator, and has the advantages of 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 are indicative of various ways in which the principles disclosed herein may be practiced, and all aspects and equivalents thereof are intended to be within the scope of the claimed subject matter. The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description read in conjunction with the accompanying drawings. Throughout this disclosure, like reference numerals generally refer to like parts or elements.
FIG. 1 shows a schematic external configuration of a fixed arc generation location plasma arc generator according to one embodiment of the present invention;
FIG. 2 is a schematic diagram showing the internal structure of a fixed arc generation location plasma arc generator in accordance with one embodiment of the present invention;
FIG. 3 is a schematic view showing a structure of a cathode tab according to an embodiment of the present invention, wherein (a) is a schematic view showing an outer structure of the cathode tab, and (b) is an axial sectional view of the cathode tab;
fig. 4 is a schematic view showing the structure of a cathode rod according to an embodiment of the present invention, wherein (a) is a schematic view showing the external structure 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.
The invention provides a novel plasma arc generator which can fix the position of an electric arc and is convenient for observing the electric arc in a scientific test process, aiming at the problem that the existing plasma arc generator is not fixed in the position of the electric arc due to the unreasonable cathode and anode structures and is not beneficial to observing the electric arc.
FIG. 1 shows an external schematic view of a plasma arc generator with a fixed arc generation location according to an embodiment of the present invention, and FIG. 2 shows an internal schematic view of the plasma arc generator in FIG. 1.
As shown in fig. 1 and 2, a device for fixing the position of an arc includes an anode 1 and a cathode 2, which are coaxially disposed, wherein the anode 1 is a metal circular tube, the cathode 2 is a metal cylinder, and the cathode 2 is located inside the anode 1. The first discharge structure 11 is arranged at the top end of the anode 1. The cathode 2 includes a cathode rod 21 and a cathode tap 22 as a second discharge structure, the cathode tap 22 being positioned at the top end of the cathode rod 21, the cathode tap 22 being provided with a pointed end 221 protruded outwardly, and the pointed end 221 facing the first discharge structure 11.
In use, the plasma arc generator is arranged with the cathode 2 at the center of the anode 1 and the cathode head 22 flush with the first discharge structure 11. Then, the anode 1 is grounded, and the cathode 2 is connected to a negative high voltage, so that 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 a certain point on the cathode head 22 to the first discharge structure 11 is the minimum distance from a certain point on the cathode head 22 to the first discharge structure 11, since the arc is necessarily generated between two points having the shortest distance), the plasma arc 3 may occur between the tip 221 and the first discharge structure 11 (one end of the plasma arc 3 is the tip 221, and the other end is located on the first discharge structure 11 at the position closest to the tip 221), as shown in fig. 3, that is, the position where the plasma arc 3 occurs 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 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 installed.
The tip 221 of the cathode tap 22 may be a tip of various shapes in principle, and it suffices as long as the distance from the tip to the first discharge structure 11 can be ensured to be shorter than the distance from other positions on the cathode tap 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 tabs 22 may be processed into a water-drop-like structure, as shown in fig. 1 and 2. Here, the droplet shape refers to the shape of the cross section of the cathode head 22. The tail of the drop-shaped structure serves as the tip of the arc generation location in the second discharge structure.
The cathode head 22 and the cathode rod 21 may be an integral piece or may be separate structures. 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 can be connected by a screw thread, the center of the cathode head 22 is provided with a screw hole, 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 can 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 step structure as shown in fig. 2, fig. 5 is an axial cross-sectional view of the circular step structure, and as can be seen from fig. 5, the radial cross-section of the circular step structure is trapezoidal. The circular step structure can define the discharge position in the axial direction, and the pointed end 221 can define the discharge position in the circumferential direction, and the discharge position can be fixed by matching the two.
Further, the first discharge structure 11 and the anode 1 may be an integral structure or a separate structure. When the split structure is adopted, the split structure can be fixed in a threaded mode, the external thread of the first discharge structure 11 is matched with the internal thread of the metal round pipe, or the internal thread of the first discharge structure 11 is matched with the external thread of the metal round pipe.
In addition, in the present embodiment, the position where the arc is generated is mainly determined by the tip 221 of the cathode 2, and thus, the first discharge structure 11 may not necessarily be the completed circular step structure shown in fig. 2, and may be, for example, a portion of the 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 shown in fig. 3 and 4 is used 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 to reflect the intent: that the invention as claimed 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 divided into multiple features. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features or 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 included in other embodiments, rather than other features, 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 adjectives "first", "second", "third", etc., to describe a common object, merely indicate that different instances of like objects are being referred to, and are not intended to imply that the objects so described must be in a given sequence, 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 this description, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed 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 (7)
1. A plasma arc generator for fixing the position of arc generation 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, the end part of the anode is provided with a first discharge structure, and the plasma arc generator is characterized in that,
the negative pole includes negative pole and negative pole head, the negative pole head is located the tip of negative pole, the negative pole head is as the second structure of discharging, the second structure of discharging is provided with outside bellied pointed end, pointed end orientation the first structure of discharging.
2. The plasma arc generator of claim 1 wherein the first discharge structure extends around the circumference of the anode end.
3. The plasma arc generator of claim 1 or 2 wherein the cathode head is a drop-shaped structure and a tail of the drop-shaped structure is directed toward the first discharge structure.
4. The plasma arc generator of claim 1 wherein the cathode head is removably connected to the cathode rod.
5. The plasma arc generator of claim 4 wherein the cathode head and cathode rod are connected by threads.
6. The plasma arc generator of claim 1 wherein the first discharge structure is convex to the inside.
7. The plasma arc generator of claim 1 wherein the first discharge structure is removably coupled 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 true CN115734449A (en) | 2023-03-03 |
| CN115734449B CN115734449B (en) | 2023-11-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116581627A (en) * | 2023-07-12 | 2023-08-11 | 吉林省永利激光科技有限公司 | Gas laser |
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| Publication number | Publication date |
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| CN115734449B (en) | 2023-11-14 |
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