CN114379824A - Graphite touch electrode assembly of electric propulsion hollow cathode - Google Patents
Graphite touch electrode assembly of electric propulsion hollow cathode Download PDFInfo
- Publication number
- CN114379824A CN114379824A CN202210032093.0A CN202210032093A CN114379824A CN 114379824 A CN114379824 A CN 114379824A CN 202210032093 A CN202210032093 A CN 202210032093A CN 114379824 A CN114379824 A CN 114379824A
- Authority
- CN
- China
- Prior art keywords
- graphite
- touch
- touch electrode
- hollow cathode
- pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 48
- 239000010439 graphite Substances 0.000 title claims abstract description 48
- 239000000919 ceramic Substances 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 238000005219 brazing Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004544 sputter deposition Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/40—Arrangements or adaptations of propulsion systems
- B64G1/405—Ion or plasma engines
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Remote Sensing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
The invention discloses a graphite touch electrode assembly of an electric propulsion hollow cathode, belongs to the technical field of electric propulsion systems, and aims to solve the problem that the service life of the existing hollow cathode is shortened due to high-energy ion sputtering in the running process of the electric propulsion system. It includes: a graphite touch electrode top, a touch electrode shell and insulating ceramics; touch and hold utmost point shell and be both ends open-ended drum, the open-top end is equipped with the step face, the open-bottom end is equipped with the edge of turning up, turn up along being equipped with the screw hole, the screw hole is used for holding utmost point electrode cooperation installation with touching, graphite touches and holds utmost point top for open-bottom drum, the open end and the step face cooperation installation of bottom, graphite touches the top of holding utmost point top and opens there is the aperture, the emergent electron that touches and hold utmost point electrode passes through the aperture and jets out, insulating ceramic is ring shape, install the inside of holding utmost point shell in touching. The invention is used in the hollow cathode of the Hall thruster.
Description
Technical Field
The invention relates to a graphite touch electrode assembly of an electric propulsion hollow cathode, belonging to the technical field of electric propulsion systems.
Background
The hollow cathode is a key core component of Hall electric propulsion, and the main functions of the hollow cathode comprise:
(1) in order to successfully start the Hall thruster, the hollow cathode needs to be used as an electron source to provide enough seed electrons;
(2) in the running process of the Hall thruster, the ejected plume contains a large amount of ions, and in order to reduce the damage of the ejected plume to the thruster, the hollow cathode needs to be used as a neutralizer to generate electrons and neutralize the plume;
(3) an accelerating electric field is formed between the negative electrode and the thruster.
Therefore, the hollow cathode with good working performance is an essential component for normal operation of the Hall thruster.
Ignition and stable operation of the thruster require the contact electrode to provide positive potential for the cathode, so that electrons emitted by the emitter are led out of the cathode shell to form a discharge loop with the thruster. Meanwhile, a part of high-energy ions in the plume of the Hall thruster bombard the cathode, which threatens the reliability of the cathode structure, so that a proper structure needs to be adopted, the sputtering resistance of the cathode shell is improved, and the service life of the cathode is prolonged.
Disclosure of Invention
The invention aims to solve the problem that the service life of the existing hollow cathode is shortened due to high-energy ion sputtering in the running process of an electric propulsion system, and provides a graphite touch electrode assembly of an electric propulsion hollow cathode.
The invention provides a graphite touch holding pole component of an electric propulsion hollow cathode, which comprises: a graphite touch electrode top, a touch electrode shell and insulating ceramics;
the touch electrode shell is a cylinder with two open ends, the open end at the top is provided with a step surface, the open end at the bottom is provided with an outward turning edge, the outward turning edge is provided with a threaded hole, the threaded hole is used for being matched and installed with the touch electrode,
the graphite touch pole is a cylinder with an opening at the bottom, the opening end at the bottom is matched with the step surface,
the top of the graphite touch electrode top is provided with a small hole, emergent electrons of the touch electrode are emitted through the small hole, and the insulating ceramic is annular and is arranged inside the touch electrode shell.
Preferably, the open end of the graphite touch electrode top is provided with a step flanging edge, and the step flanging edge is matched with the step surface of the touch electrode shell for installation.
Preferably, the graphite electrode shell further comprises a metal ring, wherein the metal ring is annular, the inner wall of the metal ring is provided with a step, the metal ring is matched with the step outward-turning edge of the graphite electrode contact-holding top and can surround a part of the step surface of the electrode contact-holding shell.
Preferably, the open end of the graphite touch and hold pole top and the open end of the touch and hold pole shell are fixedly connected through spot welding.
Preferably, the insulating ceramic and the holding pole housing are fixedly connected by brazing.
Preferably, the metal ring and the holding pole housing are fixedly connected by brazing.
The invention has the advantages that: compared with the traditional molybdenum material touch electrode, the graphite touch electrode top made of the graphite material can improve the sputtering resistance, prolong the service life and reduce the weight. In addition, the ignition of the contact electrode applies a high voltage of several hundred volts between the contact electrode and the cathode, plus the brazed insulating ceramic, reducing the likelihood of insulation failure of the contact electrode and the insulating assembly.
Drawings
FIG. 1 is a schematic structural view of a graphite holder assembly of an electrically propelled hollow cathode according to example 1 of the present invention;
FIG. 2 is a schematic diagram of the external structure of a graphite holder assembly of an electrically propelled hollow cathode according to example 1 of the present invention;
FIG. 3 is a schematic structural view of a contact electrode case according to embodiment 1 of the present invention, in which a step surface is flush with a tail end of an insulating ceramic;
FIG. 4 is a schematic structural diagram of a graphite holder electrode assembly of an electrically propelled hollow cathode according to example 2 of the present invention;
fig. 5 is a schematic diagram of the external structure of a graphite electrode assembly of an electrically-propelled hollow cathode according to example 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Example 1:
the following describes the present embodiment with reference to fig. 1, 2 and 3, and the graphite electrode assembly of the electrically propelled hollow cathode of the present embodiment:
as shown in fig. 1 and 2, it includes: a graphite touch electrode top 1, a touch electrode shell 2 and insulating ceramics 3;
the touch electrode shell 2 is a cylinder with two open ends, the open end at the top is provided with a step surface 2-1, the open end at the bottom is provided with an outward turning edge 2-2, the outward turning edge 2-2 is provided with a threaded hole 2-3, the threaded hole 2-3 is used for being installed with the touch electrode in a matching way,
the graphite touch pole top 1 is a cylinder with an opening at the bottom, the opening end at the bottom is matched and arranged with the step surface 2-1,
the top of the graphite touch electrode top 1 is provided with a small hole 1-1, emergent electrons of the touch electrode are ejected through the small hole 1-1, and the insulating ceramic 3 is annular and is arranged inside the touch electrode shell 2.
Furthermore, a step outward-turning edge 1-2 is arranged at the opening end of the graphite touch electrode top 1, and the step outward-turning edge 1-2 is matched with a step surface 2-1 of the touch electrode shell 2 for installation.
Still further, the open end of the graphite touch electrode top 1 and the open end of the touch electrode shell 2 are fixedly connected through spot welding.
Further, the insulating ceramic 3 and the holding electrode housing 2 are fixedly connected by brazing.
In the present embodiment, the insulating ceramic 3 can maintain insulation between the insulating ceramic 3 and other components of the cathode.
In the present embodiment, the insulating ceramic 3 and the holding electrode case 2 are brazed using a ceramic seal alloy such as 4J34 or 4J33, which has the closest coefficient of thermal expansion to that of alumina ceramic.
Still further, the metal ring 4 and the holding pole housing 2 are fixedly connected by brazing.
Further, as shown in FIG. 3, the stepped surface 2-1 of the touch pole case 2 is flush with the end of the insulating ceramic 3.
Example 2:
the present embodiment will be described with reference to fig. 4 and 5, and the graphite electrode assembly of the hollow cathode of the present embodiment includes: a graphite touch electrode top 1, a touch electrode shell 2 and insulating ceramics 3;
the touch electrode shell 2 is a cylinder with two open ends, the open end at the top is provided with a step surface 2-1, the open end at the bottom is provided with an outward turning edge 2-2, the outward turning edge 2-2 is provided with a threaded hole 2-3, the threaded hole 2-3 is used for being installed with the touch electrode in a matching way,
the graphite touch pole top 1 is a cylinder with an opening at the bottom, the opening end at the bottom is matched and arranged with the step surface 2-1,
the top of the graphite touch electrode top 1 is provided with a small hole 1-1, emergent electrons of the touch electrode are ejected through the small hole 1-1, and the insulating ceramic 3 is annular and is arranged inside the touch electrode shell 2.
The graphite electrode plate also comprises a metal ring 4, wherein the metal ring 4 is annular, the inner wall of the metal ring is provided with a step, the metal ring is matched with the step turning-out edge 1-2 of the graphite electrode contact and hold top 1, and the metal ring can surround a part of the step surface 2-1 of the electrode contact and hold shell 2.
Furthermore, a step outward-turning edge 1-2 is arranged at the opening end of the graphite touch electrode top 1, and the step outward-turning edge 1-2 is matched with a step surface 2-1 of the touch electrode shell 2 for installation.
Still further, the open end of the graphite touch electrode top 1 and the open end of the touch electrode shell 2 are fixedly connected through spot welding.
Further, the insulating ceramic 3 and the holding electrode housing 2 are fixedly connected by brazing.
In the present embodiment, the insulating ceramic 3 can maintain insulation between the insulating ceramic 3 and other components of the cathode.
In the present embodiment, the brazing material of the insulating ceramic 3 and the contact electrode housing 2 is a ceramic seal alloy such as 4J34 or 4J33, which has the closest thermal expansion coefficient to the alumina ceramic, thereby preventing the insulating ceramic from falling off or being extruded due to thermal stress during the operation of the cathode.
Still further, the metal ring 4 and the holding pole housing 2 are fixedly connected by brazing.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (6)
1. An electrically propelled hollow cathode graphite touch holder assembly comprising: a graphite touch electrode top (1), a touch electrode shell (2) and insulating ceramics (3);
the touch electrode shell (2) is a cylinder with two open ends, the top open end is provided with a step surface (2-1), the bottom open end is provided with an outward turning edge (2-2), the outward turning edge (2-2) is provided with a threaded hole (2-3), the threaded hole (2-3) is used for being installed with the touch electrode in a matching way,
the graphite touch pole top (1) is a cylinder with an opening at the bottom, the opening end at the bottom is matched and arranged with the step surface (2-1),
the top of the graphite touch electrode top (1) is provided with a small hole (1-1), emergent electrons of the touch electrode are ejected through the small hole (1-1), and the insulating ceramic (3) is annular and is arranged inside the touch electrode shell (2).
2. An electrically propelled hollow cathode graphite touch and hold pole assembly as claimed in claim 1, wherein the open end of the graphite touch and hold pole top (1) is provided with a step flanging (1-2), and the step flanging (1-2) is fitted with the step surface (2-1) of the touch and hold pole housing (2).
3. The graphite touch-holding pole assembly of the electric propulsion hollow cathode according to the claim 2 is characterized in that the graphite touch-holding pole assembly also comprises a metal ring (4), the metal ring (4) is in a ring shape, the inner wall of the metal ring is provided with steps, the metal ring is matched with the step upturned edge (1-2) of the graphite touch-holding pole top (1) to be installed, and can surround a part of the step surface (2-1) of the touch-holding pole shell (2).
4. An electrically propelled hollow cathode graphite touch pole assembly according to claim 1, wherein the open end of the graphite touch pole tip (1) and the open end of the touch pole housing (2) are fixedly connected by spot welding.
5. An electrically propelled hollow cathode graphite touch electrode assembly according to claim 1, characterized in that the insulating ceramic (3) is fixedly connected to the touch electrode housing (2) by brazing.
6. An electrically propelled hollow cathode graphite touch pole assembly according to claim 3, characterized in that the metal ring (4) is fixedly connected with the touch pole housing (2) by brazing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210032093.0A CN114379824A (en) | 2022-01-12 | 2022-01-12 | Graphite touch electrode assembly of electric propulsion hollow cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210032093.0A CN114379824A (en) | 2022-01-12 | 2022-01-12 | Graphite touch electrode assembly of electric propulsion hollow cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114379824A true CN114379824A (en) | 2022-04-22 |
Family
ID=81202498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210032093.0A Pending CN114379824A (en) | 2022-01-12 | 2022-01-12 | Graphite touch electrode assembly of electric propulsion hollow cathode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114379824A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283867A (en) * | 2022-07-21 | 2022-11-04 | 上海蓝箭鸿擎科技有限公司 | Method for assembling an anode distributor for an electrically propelled gas |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014176603A1 (en) * | 2013-04-26 | 2014-10-30 | Colorado State University Research Foundation | 12CaO-7Al2O3 ELECTRIDE HOLLOW CATHODE |
| CN204558411U (en) * | 2015-03-06 | 2015-08-12 | 兰州空间技术物理研究所 | A kind of closed hollow cathode with heat insulation effect touches holds pole assembly |
| CN105553298A (en) * | 2016-01-29 | 2016-05-04 | 深圳航天科技创新研究院 | Hollow cathode power converter and control system thereof |
| CN106373840A (en) * | 2016-08-31 | 2017-02-01 | 兰州空间技术物理研究所 | Graphite contact-holding electrode used for hollow negative electrode |
| CN111038741A (en) * | 2019-12-31 | 2020-04-21 | 哈尔滨工业大学 | Hectowatt-level aerospace electric propulsion hollow cathode structure |
| CN111120234A (en) * | 2019-12-19 | 2020-05-08 | 上海航天控制技术研究所 | Graphite high-temperature cathode device for electric thruster |
| CN111765059A (en) * | 2020-07-09 | 2020-10-13 | 电子科技大学 | Cold start hollow cathode |
| US20210100089A1 (en) * | 2018-05-11 | 2021-04-01 | University Of Southampton | Hollow Cathode Apparatus |
| CN113357114A (en) * | 2021-07-19 | 2021-09-07 | 哈尔滨工业大学 | Main cathode assembly structure applied to thruster and assembly method thereof |
-
2022
- 2022-01-12 CN CN202210032093.0A patent/CN114379824A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014176603A1 (en) * | 2013-04-26 | 2014-10-30 | Colorado State University Research Foundation | 12CaO-7Al2O3 ELECTRIDE HOLLOW CATHODE |
| CN204558411U (en) * | 2015-03-06 | 2015-08-12 | 兰州空间技术物理研究所 | A kind of closed hollow cathode with heat insulation effect touches holds pole assembly |
| CN105553298A (en) * | 2016-01-29 | 2016-05-04 | 深圳航天科技创新研究院 | Hollow cathode power converter and control system thereof |
| CN106373840A (en) * | 2016-08-31 | 2017-02-01 | 兰州空间技术物理研究所 | Graphite contact-holding electrode used for hollow negative electrode |
| US20210100089A1 (en) * | 2018-05-11 | 2021-04-01 | University Of Southampton | Hollow Cathode Apparatus |
| CN111120234A (en) * | 2019-12-19 | 2020-05-08 | 上海航天控制技术研究所 | Graphite high-temperature cathode device for electric thruster |
| CN111038741A (en) * | 2019-12-31 | 2020-04-21 | 哈尔滨工业大学 | Hectowatt-level aerospace electric propulsion hollow cathode structure |
| CN111765059A (en) * | 2020-07-09 | 2020-10-13 | 电子科技大学 | Cold start hollow cathode |
| CN113357114A (en) * | 2021-07-19 | 2021-09-07 | 哈尔滨工业大学 | Main cathode assembly structure applied to thruster and assembly method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283867A (en) * | 2022-07-21 | 2022-11-04 | 上海蓝箭鸿擎科技有限公司 | Method for assembling an anode distributor for an electrically propelled gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4981720B2 (en) | Ionization gauge | |
| CN109236594B (en) | Low-power magnetized electric propulsion hollow cathode thruster | |
| CN114379824A (en) | Graphite touch electrode assembly of electric propulsion hollow cathode | |
| CN103296579A (en) | Surface-breakdown-type vacuum switch trigger electrode | |
| US3315125A (en) | High-power ion and electron sources in cascade arrangement | |
| US5083005A (en) | Electrode for working plasma torch and corresponding torch | |
| JP4130974B2 (en) | Hollow cathode | |
| CN114302546B (en) | High-efficiency low-pollution plasma source | |
| US3465205A (en) | Vacuum gap devices with metal ionizable species evolving trigger assemblies | |
| CN114753981A (en) | Micro propeller based on annular bombardment cathode | |
| US11629706B2 (en) | Vacuum cathode arc-induced pulsed thruster | |
| CN116006429A (en) | Miniature DC ion thruster based on glow discharge cathode | |
| CN116313689A (en) | Barium tungsten lanthanum hexaboride composite hollow cathode | |
| JP7129074B1 (en) | Pulse-type propulsion machine using vacuum cathodic arc discharge | |
| CN209619443U (en) | The double filament averagers of ion beam apparatus | |
| CN114513868B (en) | Electric heater assembly of electric propulsion hollow cathode | |
| CN109881174A (en) | The double filament averagers of ion beam apparatus | |
| CN209418459U (en) | Ion averager electron source | |
| CN221634006U (en) | Surface triggering structure and vacuum arc ion source | |
| US2815463A (en) | Electrical apparatus | |
| CN114562436B (en) | Sputter-contamination-resistant insulation enhanced grid system | |
| CN218160268U (en) | Tantalum tube insulating part structure of hollow cathode ion source neutralizer | |
| CN212570920U (en) | Ion source and ion implanter | |
| CN214672492U (en) | Ion source head structure and ion implanter | |
| CN216057601U (en) | Hollow cathode structure and plasma generator suitable for multiple gases |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |