CN115559873A - Gas circuit electric insulator integrated with hollow cathode - Google Patents
Gas circuit electric insulator integrated with hollow cathode Download PDFInfo
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- CN115559873A CN115559873A CN202211142086.2A CN202211142086A CN115559873A CN 115559873 A CN115559873 A CN 115559873A CN 202211142086 A CN202211142086 A CN 202211142086A CN 115559873 A CN115559873 A CN 115559873A
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- hollow cathode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0006—Details applicable to different types of plasma thrusters
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- Combustion & Propulsion (AREA)
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas-Filled Discharge Tubes (AREA)
Abstract
The utility model relates to a plasma advances technical field, particularly, relates to an integrated gas circuit electrical insulator ware with hollow cathode integration, including the interface of admitting air, insulating cavity and the interface of giving vent to anger, wherein: one side of the insulating cavity is connected with the air inlet interface and is provided with an air inlet; the other side of the insulating chamber is connected with the air outlet interface and is provided with an air outlet; the air inlet interface is connected with an air supply pipeline, and the air outlet interface is connected with the hollow cathode; the inside of insulating cavity is provided with ceramic insulation structure, and the outside is provided with the metallic shield cover. The gas circuit electric insulator has the advantages that the structure is simple, the size is small, the weight is light, the internal assembly of the gas circuit electric insulator is specially designed, the distance between an inlet electrode and an outlet electrode is increased under the same axial length, the insulating property is improved, the probability that a sputtering object is deposited on the surface of a ceramic insulating structure is reduced, the high-performance gas circuit electric insulator can be integrated with the hollow cathode in an integrated mode, and the integration level of a product is improved.
Description
Technical Field
The application relates to the technical field of plasma propulsion, in particular to a gas circuit electric insulator integrated with a hollow cathode in an integrated mode.
Background
When the ion thruster works, the hollow cathode is in a high-voltage state, the voltage of the hollow cathode can reach kilovolt, and an air path electric insulator is required to be arranged on an air supply pipeline of the ion thruster to restrain low-pressure discharge so as to ensure that the electric thruster can work normally and the whole safety is ensured.
The existing product gas circuit electric insulator and the hollow cathode are separately designed, the gas circuit is insulated, the gas circuit interface and the fixed mounting interface of the hollow cathode need to be designed, the gas flow path is linear, the axial size is large, and the integrated design is not facilitated.
Disclosure of Invention
The main aim at of this application provides an integrated gas circuit electrical insulator with hollow cathode integration, has increased the distance of entry and exit electrode, has improved insulating nature, and when can realize high performance gas circuit electrical insulation is integrated with hollow cathode integration, has improved the product integration level, has reduced the volume.
In order to achieve the above object, the present application provides an integrated gas circuit electrical insulator with hollow cathode, including the interface of admitting air, insulating cavity and giving vent to anger the interface, wherein: one side of the insulating cavity is connected with the air inlet interface and is provided with an air inlet; the other side of the insulating chamber is connected with the air outlet interface and is provided with an air outlet; the air inlet interface is connected with the air supply pipeline, and the air outlet interface is connected with the hollow cathode; the inside of insulating cavity is provided with ceramic insulation structure, and the outside is provided with the metallic shield cover.
Further, ceramic insulation structure includes interior ceramic insulation structure and outer ceramic insulation structure, and outer ceramic insulation structure's one end and the interface connection that admits air, the other end and the interface connection that gives vent to anger, interior ceramic insulation structure sets up the inside at insulating cavity.
Further, the inner ceramic insulation structure and the outer ceramic insulation structure form an S-shaped gas flow channel inside the insulation chamber.
Furthermore, air outlet holes are formed in the circumferential direction of the inner ceramic insulation structure, and the outer surface of the outer ceramic insulation structure is of a U-shaped groove structure.
Further, the S-shaped gas flow channel formed inside the insulating chamber is filled with alumina ceramic particles.
Furthermore, the metal shielding cover comprises an inner metal shielding cover and an outer metal shielding cover, and bending structures are arranged in the middle of the inner metal shielding cover and the middle of the outer metal shielding cover.
Furthermore, one end of the inner metal shielding cover is fixedly connected with the air inlet interface.
Furthermore, one end of the outer metal shielding cover is fixedly connected with the air outlet interface.
Furthermore, the air outlet holes are all provided with stainless steel screen meshes.
Furthermore, the ceramic insulation structure is made of alumina ceramic, and the metal shielding case is made of thin-wall kovar alloy material 4J29.
The gas circuit electric insulator integrated with the hollow cathode provided by the invention has the following beneficial effects:
this application simple structure, small, the quality is light, special design has been carried out to gas circuit electrical insulator' S inner assembly, through setting up inside and outside ceramic insulation structure, can follow the inside S type passageway of insulating cavity after making working medium gas get into and flow, entry and exit electrode distance have been increased under the same axial length, insulativity has been improved, through setting up inside and outside metal shield cover, the probability of sputter deposit to ceramic insulation structure surface has been reduced, and designed the interface of being connected with hollow cathode, integrated with hollow cathode integration when can realize high performance gas circuit electrical insulation, the integrated level of product has been improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and the description of the exemplary embodiments of the present application are provided for explaining the present application and do not constitute an undue limitation on the present application. In the drawings:
FIG. 1 is a schematic view of a gas path electrical insulator integrally integrated with a hollow cathode provided in accordance with an embodiment of the present application;
FIG. 2 is a cross-sectional view of a gas path electrical insulator integrated with a hollow cathode provided in accordance with an embodiment of the present application;
FIG. 3 is a schematic view of a ceramic insulation structure within a gas path electrical insulator integrally integrated with a hollow cathode provided in accordance with an embodiment of the present application;
FIG. 4 is a schematic view of a gas path electrical insulator outer ceramic insulation structure integrally integrated with a hollow cathode provided in accordance with an embodiment of the present application;
in the figure: 1-air inlet interface, 2-outer ceramic insulation structure, 3-inner ceramic insulation structure, 4-inner metal shielding cover, 5-outer metal shielding cover, 6-stainless steel screen, 7-air outlet interface, 8-ceramic particles, 9-hollow cathode and 10-air inlet.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.
As shown in fig. 1, the present application provides a gas circuit electrical insulator integrated with a hollow cathode, which includes an air inlet interface 1, an insulating chamber and an air outlet interface 7, wherein: one side of the insulating cavity is connected with the air inlet interface 1 and is provided with an air inlet 10; the other side of the insulating chamber is connected with an air outlet interface 7 and is provided with an air outlet; the air inlet interface 1 is connected with an air supply pipeline, and the air outlet interface 7 is connected with a hollow cathode 9; the inside of insulating cavity is provided with ceramic insulation structure, and the outside is provided with the metallic shield cover.
Specifically, the gas path electric insulator integrated with the hollow cathode provided in the embodiment of the present application is disposed between the gas supply line and the hollow cathode 9, so as to ensure the insulation of the gas entering the hollow cathode 9. Working medium gas in the gas supply device enters the gas inlet interface 1 along a gas supply pipeline, enters the insulating chamber through the gas inlet 10 on the gas inlet interface 1, flows in the insulating chamber, is insulated by ceramic insulating materials and then enters the hollow cathode 9 through the gas outlet, and the normal work of the thruster at the subsequent point is ensured.
Further, ceramic insulation structure includes interior ceramic insulation structure 3 and outer ceramic insulation structure 2, and outer ceramic insulation structure 2's one end and the interface 1 connection that admits air, the other end and the interface 7 connection of giving vent to anger, and interior ceramic insulation structure 3 sets up the inside at insulating cavity. The inner ceramic insulation structure 3 and the outer ceramic insulation structure 2 are both annular cylindrical structures, the outer ceramic insulation structure 2 is fixed between the air inlet interface 1 and the air outlet interface 7, and after the inner ceramic insulation structure 3 and the outer ceramic insulation structure 2 are assembled, an insulation cavity is formed in the middle and used for flowing of working medium gas.
Further, as shown in fig. 3 to 4, the inner ceramic insulating structure 3 and the outer ceramic insulating structure 2 form S-shaped gas flow channels inside the insulating chamber. In the embodiment of the application, after the inner ceramic insulation structure 3 and the outer ceramic insulation structure 2 are brazed, fixed and assembled, the inside S-shaped gas flow channel is formed in the insulation cavity, the working medium gas flows up and down along the S-shaped gas channel respectively, and finally converges together through the gas outlet, and enters into the hollow cathode 9 through the gas outlet.
Further, air outlet holes are formed in the circumferential direction of the inner ceramic insulation structure 3, and the outer surface of the outer ceramic insulation structure 2 is of a U-shaped groove structure. Interior ceramic insulation structure 3 and the interface 7 fixed connection of giving vent to anger, at the junction of interior ceramic insulation structure 3 and the interface 7 of giving vent to anger, be provided with the round venthole along circumference, the aperture is preferred 2mm, can increase the homogeneity that the gas flows. The outer surface of the outer ceramic insulation structure 2 is designed into a U-shaped groove form along the annular distribution, the groove width is preferably 0.3mm, and the risk of insulation reduction caused by deposition of ion sputtering on the surface is reduced.
Further, the S-shaped gas flow channel formed inside the insulating chamber is filled with alumina ceramic particles 8. The alumina ceramic particles 8 are filled inside mainly for the purpose of insulating the flowing gas, and the diameter of the alumina ceramic particles 8 is preferably 400um.
Further, the metal shielding cover comprises an inner metal shielding cover 4 and an outer metal shielding cover 5, and the middle parts of the inner metal shielding cover 4 and the outer metal shielding cover 5 are both provided with a bending structure. The metal shielding cover is arranged into an inner structure and an outer structure, the inner metal shielding cover and the outer metal shielding cover 5 are designed into a labyrinth form, the path of a sputtering object contacting the surface of the outer ceramic insulation structure 2 is reduced, the middle of the metal shielding cover is designed into a bending shape, the structural strength is enhanced, and the probability of the sputtering object depositing on the surface of the ceramic structure is reduced.
Furthermore, one end of the inner metal shielding case 4 is fixedly connected with the air inlet interface 1. The inner metal shielding cover 4 is arranged in an annular cylindrical shape, one end of the inner metal shielding cover is fixedly connected with the air inlet interface 1, and the whole inner metal shielding cover is sleeved outside the outer ceramic insulation structure 2.
Furthermore, one end of the outer metal shielding case 5 is fixedly connected with the air outlet interface 7. The outer metal shielding cover 5 is also arranged in an annular cylinder shape, one end of the outer metal shielding cover is fixedly connected with the air outlet port 7, and the outer metal shielding cover 4 is integrally sleeved outside the inner metal shielding cover.
Further, the air outlet holes are provided with stainless steel screen meshes 6. The ventholes that 3 circumference of interior ceramic insulation structure distribute all are provided with stainless steel screen cloth 6, and the diameter of mesh is less than 400um for block ceramic particle 8 and get into hollow cathode 9.
Furthermore, the ceramic insulation structure is made of alumina ceramic, and the metal shielding case is made of thin-wall kovar alloy material 4J29. The ceramic insulation structure is mainly used for insulating working medium gas, the material is preferably an alumina ceramic material, the metal shielding cover is mainly used for blocking external sputtering deposits, and the material is preferably a kovar alloy material 4J29.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides an integrated gas circuit electrical insulator with hollow cathode integration which characterized in that, includes the interface of admitting air, insulating cavity and the interface of giving vent to anger, wherein:
one side of the insulating cavity is connected with the air inlet interface and is provided with an air inlet;
the other side of the insulating cavity is connected with the air outlet interface and is provided with an air outlet;
the air inlet interface is connected with an air supply pipeline, and the air outlet interface is connected with the hollow cathode;
the inside of insulating cavity is provided with ceramic insulation structure, and the outside is provided with the metallic shield cover.
2. The gas path electrical insulator integrated with a hollow cathode of claim 1, wherein said ceramic insulating structure comprises an inner ceramic insulating structure and an outer ceramic insulating structure, one end of said outer ceramic insulating structure is connected with said gas inlet interface and the other end is connected with said gas outlet interface, said inner ceramic insulating structure is disposed inside said insulating chamber.
3. The gas path electrical insulator integrated with a hollow cathode of claim 2, wherein said inner ceramic insulating structure and said outer ceramic insulating structure form an S-shaped gas flow channel inside said insulating chamber.
4. The gas path electrical insulator integrated with the hollow cathode of claim 2, wherein gas outlet holes are provided along a circumferential direction of the inner ceramic insulating structure, and an outer surface of the outer ceramic insulating structure is provided in a U-shaped groove structure.
5. A gas path electrical insulator integrated with a hollow cathode according to claim 3, wherein the S-shaped gas flow channel formed inside the insulating chamber is filled with alumina ceramic particles.
6. The gas circuit electrical insulator integrated with a hollow cathode of claim 2, wherein said metal shield comprises an inner metal shield and an outer metal shield, and a bend is provided at the middle of each of said inner metal shield and said outer metal shield.
7. The gas circuit electrical insulator integrated with a hollow cathode of claim 6, wherein one end of said inner metallic shield is fixedly connected to said gas inlet port.
8. The gas path electrical insulator integrated with a hollow cathode of claim 6, wherein one end of said outer metal shield is fixedly connected to said gas outlet port.
9. The gas path electrical insulator integrated with the hollow cathode of claim 4, wherein the gas outlet holes are each provided with a stainless steel screen.
10. The gas path electrical insulator integrated with the hollow cathode of claim 1, wherein the material of the ceramic insulating structure is alumina ceramic and the material of the metallic shield is thin-walled kovar alloy 4J29.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211142086.2A CN115559873A (en) | 2022-09-20 | 2022-09-20 | Gas circuit electric insulator integrated with hollow cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211142086.2A CN115559873A (en) | 2022-09-20 | 2022-09-20 | Gas circuit electric insulator integrated with hollow cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115559873A true CN115559873A (en) | 2023-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211142086.2A Pending CN115559873A (en) | 2022-09-20 | 2022-09-20 | Gas circuit electric insulator integrated with hollow cathode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115559873A (en) |
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2022
- 2022-09-20 CN CN202211142086.2A patent/CN115559873A/en active Pending
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