CN108174471B - Tubular electrode - Google Patents
Tubular electrode Download PDFInfo
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- CN108174471B CN108174471B CN201711220584.3A CN201711220584A CN108174471B CN 108174471 B CN108174471 B CN 108174471B CN 201711220584 A CN201711220584 A CN 201711220584A CN 108174471 B CN108174471 B CN 108174471B
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- body structure
- electrode
- heat dissipation
- holes
- water inlet
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/12—Arrangements for cooling, sealing or protecting electrodes
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Discharge Heating (AREA)
- Plasma Technology (AREA)
Abstract
The invention provides a tubular electrode, and relates to the field of aerospace pneumatic thermal protection systems. The tubular electrode comprises at least one electrode pipe section, the electrode pipe section comprises a tubular body structure and two connecting parts, a plurality of heat dissipation holes are formed in the pipe wall of the body structure, the heat dissipation holes extend in the axis direction of the body structure, the two ends of the body structure are sealed, the two connecting parts are located at the two ends of the body structure respectively, water inlet and outlet through holes are formed in the connecting parts, and the water inlet and outlet through holes are communicated with the heat dissipation holes. According to the tubular electrode provided by the embodiment of the invention, the heat dissipation through hole is formed in the tube wall, the water inlet and outlet through hole is formed in the connecting part, and the cooling medium is introduced into the heat dissipation through hole from the water inlet and outlet through hole to cool the body structure of the electrode tube section, so that the problem of electrode ablation is greatly reduced, and the service life of the electrode is prolonged.
Description
Technical Field
The invention relates to the field of aerospace pneumatic thermal protection systems, in particular to a tubular electrode with a punching cooling function, which can operate for a long time under high arc chamber pressure.
Background
The electric arc heater is core equipment for the thermal protection ground simulation test research of aerospace craft at home and abroad, and is an important means for solving the thermal protection ground examination of high-supersonic speed aircrafts such as missiles, recoverable satellites, manned spacecraft reentry cabins and the like.
At present, a tubular electric arc heater mainly undertakes the experimental tasks of high power and long-time operation under high arc chamber pressure, as shown in fig. 1a and 1b, an electrode of a common tubular electric arc heater is of a cylindrical tubular structure and comprises an electrode body (the structure shown in fig. 1 a) and an external pipe sleeve (not shown in the figure) sleeved outside the electrode body, in order to ensure that the electrode does not deform when being heated, a certain number of reinforcing ribs (as shown in fig. b) are uniformly arranged outside the electrode body, and when the tubular electric arc heater works, cooling water is introduced into a jacket between the external pipe sleeve and the electrode body for cooling.
In the process of high-power and high-arc chamber pressure long-time operation, the tubular electrode is seriously ablated, along with the model development, the requirement on the examination power is higher and higher, the requirement on the examination pressure is higher and higher, in order to meet the examination requirements, the length of the tubular electrode is longer and longer, if the power reaches 50MW, the length of the traditional tubular electrode needs to reach more than 2290mm, the electrode processing difficulty is high, and the cost is high.
Disclosure of Invention
The invention aims to provide a tubular electrode, which solves the problems of electrode ablation and high processing difficulty.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a tubular electrode, includes an at least electrode pipeline section, the electrode pipeline section includes tubulose body structure and two connecting portion, be equipped with a plurality of louvres on the pipe wall of body structure, the louvre is followed body structure axis direction extends and both ends are sealed, two connecting portions are located respectively the both ends of body structure, be equipped with business turn over water through-hole on the connecting portion, business turn over water through-hole with the louvre intercommunication.
In an optional embodiment, the tubular electrode comprises at least two electrode tube sections, and the at least two electrode tube sections are connected end to end through the connecting part to form the tubular electrode.
In an optional embodiment, two ends of the body structure are respectively provided with an annular groove, two ends of the heat dissipation hole are respectively located in the two annular grooves at the two ends, a plug ring is arranged in the annular groove, and the two ends of the heat dissipation hole are sealed by the plug ring.
In an optional embodiment, the body structure and the plug ring are made of metal and are connected by welding.
In an alternative embodiment, the connecting portion is a flange structure disposed around the body structure.
In an optional embodiment, one water inlet and outlet through hole corresponds to a plurality of heat dissipation holes, and the water inlet and outlet through hole is communicated with the heat dissipation holes through connecting holes.
In an alternative embodiment, the connection portion is threadedly connected to the body structure and sealed by a gasket.
In an alternative embodiment, the inner diameter of the body structure is 80-110mm, and the outer diameter is 130-160 mm.
In an optional embodiment, the heat dissipation holes comprise 25-30 heat dissipation holes, the heat dissipation holes are arranged at equal intervals, and the hole diameter is 6-9 mm.
In an optional embodiment, the body structure is made of red copper.
The invention at least comprises the following beneficial effects:
(1) according to the tubular electrode provided by the embodiment of the invention, the heat dissipation through hole is formed in the tube wall, the water inlet and outlet through hole is formed in the connecting part, and the cooling medium is introduced into the heat dissipation through hole from the water inlet and outlet through hole to cool the body structure of the electrode tube section, so that the problem of electrode ablation is greatly reduced, and the service life of the electrode is prolonged; the tubular electrode provided by the embodiment of the invention can be more suitable for the requirements of a modern aircraft aerodynamic heat ground simulation test, and realizes the high-power, large-flow, high-pressure, medium-low enthalpy, long-time, efficient and stable operation of the tubular plasma arc heater;
(2) the tubular electrode is arranged in a mode that a plurality of electrode pipe sections are connected end to end, so that a longer electrode can be divided into a plurality of sections for processing, and the processing difficulty and the production cost are reduced; meanwhile, the pipe section with serious ablation can be replaced according to the ablation condition of each section, so that the great economic loss caused by the scrapping of the whole pipe section due to ablation is avoided;
(3) the grooves are formed in the two ends of the body structure, the radiating holes are formed in the grooves, and the two ends of the radiating holes are sealed through the plug rings, so that the radiating holes can be conveniently machined, and the production efficiency is improved; and the plug ring can be changed as required, so that the electrode damage caused by the penetration of two ends of the heat radiation hole can be avoided.
Drawings
FIG. 1a is a schematic cross-sectional view of a tubular electrode provided in the prior art;
FIG. 1b is a side view of a tubular electrode structure provided in the prior art;
fig. 2 is a schematic structural diagram of a tubular electrode according to an embodiment of the present invention;
FIG. 3 is a side view of a tubular electrode structure according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another tubular electrode provided in an embodiment of the present invention;
fig. 5 is a schematic end view of a body structure according to an embodiment of the present invention.
Detailed Description
In order to make the advantages of the technical solutions of the present invention clearer, the present invention is described in detail below with reference to the accompanying drawings and embodiments.
Referring to fig. 2, an embodiment of the present invention provides a tubular electrode, including at least one electrode tube segment, where the electrode tube segment includes a body structure 1 and two connection portions 2, the body structure 1 is a hollow tubular structure, a plurality of heat dissipation holes 11 are formed in a tube wall of the body structure 1, the heat dissipation holes 11 extend along an axis direction of the body structure 1, and two ends of the body structure are sealed, the two connection portions 2 are respectively located at two ends of the body structure 1, water inlet and outlet through holes 21 are formed in the connection portions 2, and the water inlet and outlet through holes 21 are communicated with the heat dissipation holes.
When the tubular electrode provided by the embodiment of the invention is applied to an electric arc heater, the tubular electrode is used as a front electrode, one end of the tubular electrode is connected with the spray pipe, the other end of the tubular electrode is connected with one end of the cyclone chamber, the other section of the cyclone chamber is connected with the rear electrode, and when the tubular electrode works, the front electrode and the rear electrode are connected with a direct-current power supply to form the tubular plasma electric arc heater. According to the tubular electrode provided by the embodiment of the invention, the heat dissipation through hole is formed in the tube wall, the water inlet and outlet through hole is formed in the connecting part, and the cooling medium is introduced into the heat dissipation through hole from the water inlet and outlet through hole to cool the body structure of the electrode tube section, so that the problem of electrode ablation is greatly reduced, and the service life of the electrode is prolonged; the tubular electrode provided by the embodiment of the invention can be more suitable for the requirements of a modern aircraft aerodynamic heat ground simulation test, and realizes the high-power, large-flow, high-pressure, medium-low enthalpy, long-time, efficient and stable operation of the tubular plasma arc heater.
Referring to fig. 4, in an alternative embodiment, the tubular electrode comprises at least two electrode tube segments connected end to end by a joint 2 to form the tubular electrode.
The tubular electrode is arranged in a mode that a plurality of electrode pipe sections are connected end to end, so that a longer electrode can be divided into a plurality of sections for processing, and the processing difficulty and the production cost are reduced; meanwhile, the pipe section with serious ablation can be replaced according to the ablation condition of each section, so that the great economic loss caused by scrapping of the whole pipe section due to ablation is avoided.
Referring to fig. 2 and 5, in an alternative embodiment, two ends of the body structure 1 are respectively provided with an annular groove, two ends of the heat dissipation hole 11 are respectively located in the two annular grooves at the two ends, a plug ring 3 is arranged in the annular groove, and two ends of the heat dissipation hole 11 are sealed by the plug ring 3. Specifically, in the embodiment of the present invention, the plug ring 3 may be fixedly connected to the groove in a manner of bonding, welding, riveting, or the like, and the body structure 1 and the plug ring 3 are both made of metal, and are preferably connected by welding in order to ensure sealing of the heat dissipation hole 11.
The grooves are formed in the two ends of the body structure, the radiating holes are formed in the grooves, and the two ends of the radiating holes are sealed through the plug rings, so that the radiating holes can be conveniently machined, and the production efficiency is improved; and the plug ring can be changed as required, so that the electrode damage caused by the penetration of two ends of the heat radiation hole can be avoided.
Referring to fig. 3 and 4, the connecting portion 2 is a flange structure, and is disposed around the body structure 1. Through setting connecting portion to the flange structure, through two adjacent pipe sections of bolted connection, be convenient for fix a position and convenient to detach change the pipeline section through the screw thread through-hole on the flange.
In an optional embodiment, one water inlet and outlet through hole corresponds to a plurality of heat dissipation holes 11, and the water inlet and outlet through hole 21 is communicated with the heat dissipation holes 11 through a connection hole, so that the cooling effect is further ensured on the premise of ensuring the overall strength of the electrode.
Referring to fig. 2, the connection part 2 is screwed to the body structure 1 and sealed by a gasket 5 to facilitate replacement of the electrode tube section.
In an alternative embodiment, the inner diameter of the body structure is 80-110mm, and the outer diameter is 130-160 mm. When inside and outside diameter is in above-mentioned scope, can guarantee when structural drilling of body, the drilling size can satisfy the cooling requirement, and body structure still has higher intensity after the drilling to avoid the electrode to warp under the thermal environment, controlled body structure's processing cost again simultaneously, reduced the processing degree of difficulty. The body structure 1 is provided with 25-30 heat dissipation holes 11, the heat dissipation holes 11 are arranged at equal intervals, and the aperture is 6-9 mm. The aperture size determines the electrode strength and the processing cost, and the aperture in the range meets the cooling requirement and reduces the processing difficulty and the processing cost.
According to the embodiment of the invention, the body structure 1 is preferably made of red copper, the connecting part 2 is preferably made of stainless steel, and the plug ring 3 is preferably made of red copper, so that the processing difficulty is reduced and the cost is controlled on the premise of ensuring the strength of the whole structure.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (1)
1. A tubular electrode is characterized by comprising at least two electrode pipe sections, wherein each electrode pipe section comprises a tubular body structure and two connecting parts, the body structure is an integral structure, the outer side of the body structure is not provided with a jacket, the pipe wall of the body structure is provided with a plurality of heat dissipation holes, the heat dissipation holes extend along the axis direction of the body structure, the two ends of the heat dissipation holes are sealed, the two connecting parts are respectively positioned at the two ends of the body structure, the connecting parts are provided with water inlet and outlet through holes, and the water inlet and outlet through holes are communicated with the heat dissipation holes;
the at least two electrode pipe sections are connected end to end through the connecting part to form a tubular electrode;
two ends of the body structure are respectively provided with an annular groove, two ends of the heat dissipation hole are respectively positioned in the two annular grooves at the two ends, a plug ring is arranged in each annular groove, and the two ends of the heat dissipation hole are sealed by the plug rings;
the body structure and the plug ring are made of metal materials and are connected in a welding mode;
the connecting part is of a flange structure and is arranged around the body structure;
one water inlet and outlet through hole corresponds to a plurality of heat dissipation holes, and the water inlet and outlet through holes are communicated with the heat dissipation holes through connecting holes;
the connecting part is connected with the body structure through threads and sealed through a gasket;
the inner diameter of the body structure is 80-110mm, and the outer diameter is 130-160 mm;
the heat dissipation holes are arranged at equal intervals, and the aperture is 6-9 mm;
the body structure is made of red copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711220584.3A CN108174471B (en) | 2017-11-29 | 2017-11-29 | Tubular electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711220584.3A CN108174471B (en) | 2017-11-29 | 2017-11-29 | Tubular electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108174471A CN108174471A (en) | 2018-06-15 |
| CN108174471B true CN108174471B (en) | 2021-06-11 |
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ID=62524740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711220584.3A Active CN108174471B (en) | 2017-11-29 | 2017-11-29 | Tubular electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108174471B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612678A (en) * | 2018-12-27 | 2019-04-12 | 中国航天空气动力技术研究院 | One kind is for electrode rapid installation device after pipe arc heater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4641320A (en) * | 1982-12-16 | 1987-02-03 | Northwestern Steel And Wire Company | Shroud for furnace electrode |
| CN86209427U (en) * | 1986-11-17 | 1987-07-15 | 东北工学院 | Water injecting internally cooled conductive electrode |
| CN101309530A (en) * | 2008-07-01 | 2008-11-19 | 上海大学 | Cooling electrode for high temperature furnace |
| CN106793236A (en) * | 2016-12-19 | 2017-05-31 | 中国航天空气动力技术研究院 | A kind of welding structure tubular pole |
-
2017
- 2017-11-29 CN CN201711220584.3A patent/CN108174471B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4641320A (en) * | 1982-12-16 | 1987-02-03 | Northwestern Steel And Wire Company | Shroud for furnace electrode |
| CN86209427U (en) * | 1986-11-17 | 1987-07-15 | 东北工学院 | Water injecting internally cooled conductive electrode |
| CN101309530A (en) * | 2008-07-01 | 2008-11-19 | 上海大学 | Cooling electrode for high temperature furnace |
| CN106793236A (en) * | 2016-12-19 | 2017-05-31 | 中国航天空气动力技术研究院 | A kind of welding structure tubular pole |
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| Publication number | Publication date |
|---|---|
| CN108174471A (en) | 2018-06-15 |
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