CN109585237A - A kind of novel hollow cathode heater structure - Google Patents
A kind of novel hollow cathode heater structure Download PDFInfo
- Publication number
- CN109585237A CN109585237A CN201811347877.2A CN201811347877A CN109585237A CN 109585237 A CN109585237 A CN 109585237A CN 201811347877 A CN201811347877 A CN 201811347877A CN 109585237 A CN109585237 A CN 109585237A
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- China
- Prior art keywords
- hollow cathode
- ceramic skeleton
- heater
- heater strip
- ceramic
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/025—Hollow cathodes
-
- 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
- F03H1/0031—Thermal management, heating or cooling parts of the thruster
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electron Sources, Ion Sources (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
The present invention discloses a kind of novel hollow cathode heater structure, and a kind of novel hollow cathode heater structure is made of ceramic skeleton, heater strip and housing ceramic jacket, and the ceramic skeleton is nested in outside the cathode tube of hollow cathode, close to cathode tube top；Spiral groove radially is provided on the outside of the ceramic skeleton；The heater strip spiral is inserted in the spiral groove, is arranged between the housing ceramic jacket and ceramic skeleton, and both ends are drawn from ceramic skeleton inner end；Housing ceramics are covered outside ceramic skeleton in a manner of tight fit, and heater strip is effectively limited in spiral groove.Hollow cathode heater of the invention, structure is simple, high reliablity, and induced current interference can be effectively suppressed, reduce electromagnetic viscosimeter, can be used for the heating of space electric propulsion hollow cathode and igniting starting.
Description
Technical field
The invention belongs to space industries, are related to a kind of novel hollow cathode heater structure.
Background technique
Using hall thruster, ion thruster as the electric propulsion of representative, compared with chemical propulsion, have the advantages that than leaping high,
Be widely used in spacecraft, execution position holding, lifting track, deep space exploration promote mainly into etc. tasks.Hollow cathode is as suddenly
The key component of your thruster, ion thruster etc., performance, the reliability of starting of lighting a fire directly affect electric thruster igniting
The Performance And Reliability of starting.
It before hollow cathode igniting starting, needs to start heater first, the hair inside cathode tube will be located at using heater
Beam is heated to operating temperature (general 1100 DEG C~1600 DEG C), and emitter generates enough thermotropic electron emissions, the electricity of transmitting
Son ionizes it largely with into the intracorporal propellant gas atomic collision of hollow cathode chamber, forms discharge plasma, thus
Make hollow cathode successful ignition, star t-up discharge.
The heater structure of existing hollow cathode is generally sintering structure or single coil configuration.Sintered type heater structure,
Ceramics are still immature with heater strip integral sintering technique, and are sintered under ceramic long term high temperature and are easy cracking, cause heater strip short
Road；Single screw heater structure, heater strip both ends are drawn respectively from ceramic skeleton both ends, in the welding at the top of cathode tube
It is fixed difficult, and be easy to be sputtered the influence of truncation and high temperature to soldering reliability by hollow cathode discharge plasma, it takes off
It falls and causes heater breaking.Meanwhile hollow cathode star t-up discharge moment, since the inductance of single-screw heater strip acts on and generate
Big induced current, the electromagnetic viscosimeter generated therefrom influence the reliable operation that hollow cathode stablizes star t-up discharge and heater
Property.
Summary of the invention
The purpose of the present invention is to solve existing heater structures to easily lead to heater strip short circuit, open circuit, is also easy to produce induction
Electric current provides that a kind of structure is simple, is easily assembled, high reliablity thus the problem of influencing the starting of hollow cathode reliable ignition
Novel heater structure.
The invention is realized by the following technical scheme:
A kind of novel hollow cathode heater structure is made of, the ceramics ceramic skeleton, heater strip and housing ceramic jacket
Skeleton is nested in outside the cathode tube of hollow cathode, close to cathode tube top；It is provided with radially on the outside of the ceramic skeleton
Spiral groove；The heater strip spiral is inserted in the spiral groove, and the housing ceramic jacket and ceramic skeleton are arranged in
Between, both ends are drawn from ceramic skeleton inner end；Housing ceramics are covered outside ceramic skeleton in a manner of tight fit, will be heated
Silk is effectively limited in spiral groove.
Preferably, the spiral groove is Double-spiral groove；Double-spiral groove is with one at the top of cathode tube
End is starting point, is then drawn in the ceramic skeleton other end.
Preferably, the heater strip is inserted in spiral groove in a manner of double helix.
Preferably, heater strip one end of extraction is fixed in cathode tube, and the other end then connects with the contact conductor of hollow cathode
Connect fixation；
Preferably, the heater strip both ends of extraction are connected and fixed with two contact conductors of hollow cathode respectively.
A kind of novel hollow cathode heater structure of the invention, heater strip both ends are drawn from the ceramic skeleton other end respectively
Out, it convenient for being reliably fixed, and effectively avoids avoiding heater strip vulnerable to plasma sputtering region and high-temperature area at the top of cathode tube
It falls off, promotes heater reliability；Meanwhile the double-spiral structure of use, it can obviously weaken and start wink in hollow cathode discharge
Between, induced current that heater strip is generated by inductive effect interference, to further promote the reliable of heater and hollow cathode
Property.
Detailed description of the invention
Fig. 1 is a kind of novel hollow cathode heater structure chart of the embodiment of the present invention 1；
Fig. 2 is a kind of novel hollow cathode heater structure chart of the embodiment of the present invention 2；
Fig. 3 is a kind of novel hollow cathode heater structure chart of the embodiment of the present invention 3；
In figure: cathode tube 1；Ceramic skeleton 2；Heater strip 3；Housing ceramics 4.
Specific embodiment
Embodiment 1
As shown in Figure 1, a kind of novel hollow cathode heater structure, is made of ceramic skeleton, heater strip and housing ceramics.
Ceramic skeleton is nested in outside the cathode tube of hollow cathode, and close to cathode tube top, spiral shell radially is provided on the outside of ceramic skeleton
Revolve shape groove；Heater strip spiral is inserted in spiral groove；Housing ceramics are covered outside ceramic skeleton in a manner of tight fit, will
Heater strip is effectively limited in spiral groove.
Fluting on the outside of ceramic skeleton is Double-spiral groove, and the screw pitch of double helix is identical, and specific pitch can be according to reality
Border hollow cathode demand determines that the cross section structure of groove is bottom semicircular, Upper rectangular, and groove dimensions must accommodate heating completely
Silk.
Heater strip is inserted in the spiral groove of ceramic skeleton in a manner of double helix, and heater strip both ends are from ceramic skeleton
It is drawn far from the end face at the top of cathode tube, the design of groove must ensure that the circumferential distance of two exit of heater strip is remote enough, be formed
Circumferential angle within the scope of 60 °~180 °.
Embodiment 2
As shown in Fig. 2, a kind of novel hollow cathode heater structure, is made of ceramic skeleton, heater strip and housing ceramics.
Ceramic skeleton is nested in outside the cathode tube of hollow cathode, and close to cathode tube top, spiral shell radially is provided on the outside of ceramic skeleton
Revolve shape groove；Heater strip spiral is inserted in spiral groove；Housing ceramics are covered outside ceramic skeleton in a manner of tight fit, will
Heater strip is effectively limited in spiral groove.
Fluting on the outside of ceramic skeleton is Double-spiral groove, and the screw pitch of double helix is identical, and specific pitch can be according to reality
Border hollow cathode demand determines that the cross section structure of groove is rectangle, and groove dimensions must accommodate heater strip completely.
Heater strip is inserted in the spiral groove of ceramic skeleton in a manner of double helix, and heater strip both ends are from ceramic skeleton
It is drawn far from the end face at the top of cathode tube, the design of groove must ensure that the circumferential distance of two exit of heater strip is remote enough, be formed
Circumferential angle within the scope of 60 °~180 °.
Embodiment 3
As shown in figure 3, a kind of novel hollow cathode heater structure, is made of ceramic skeleton, heater strip and housing ceramics.
Ceramic skeleton is nested in outside the cathode tube of hollow cathode, and close to cathode tube top, spiral shell radially is provided on the outside of ceramic skeleton
Revolve shape groove；Heater strip spiral is inserted in spiral groove；Housing ceramics are covered outside ceramic skeleton in a manner of tight fit, will
Heater strip is effectively limited in spiral groove.
Fluting on the outside of ceramic skeleton is Double-spiral groove, and the screw pitch of double helix is identical, and specific pitch can be according to reality
Border hollow cathode demand determines that the cross section structure of groove is rectangle oat tail groove structure, and groove dimensions must accommodate heater strip completely.
Heater strip is inserted in the spiral groove of ceramic skeleton in a manner of double helix, and heater strip both ends are from ceramic skeleton
It is drawn far from the end face at the top of cathode tube, the design of groove must ensure that the circumferential distance of two exit of heater strip is remote enough, be formed
Circumferential angle within the scope of 60 °~180 °.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (4)
1. a kind of novel hollow cathode heater structure, which is characterized in that by ceramic skeleton, heater strip and housing ceramic jacket group
At the ceramic skeleton is nested in outside the cathode tube of hollow cathode, close to cathode tube top；It is opened on the outside of the ceramic skeleton
There is spiral groove radially；The heater strip spiral is inserted in the spiral groove, and the housing ceramic jacket is arranged in
Between ceramic skeleton, housing ceramics are covered outside ceramic skeleton in a manner of tight fit, and heater strip is effectively limited in spiral
In shape groove.
2. novel hollow cathode heater structure according to claim 1, which is characterized in that the spiral groove is double
Spiral groove.
3. the novel hollow cathode heater structure according to claim 2, which is characterized in that Double-spiral groove
Using one end at the top of cathode tube as starting point, then drawn in the ceramic skeleton other end.
4. novel hollow cathode heater structure according to claim 1, which is characterized in that the heater strip is with double helix
Mode be inserted in spiral groove, heater strip both ends from ceramic skeleton inner end draw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347877.2A CN109585237B (en) | 2018-11-13 | 2018-11-13 | Novel hollow cathode heater structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347877.2A CN109585237B (en) | 2018-11-13 | 2018-11-13 | Novel hollow cathode heater structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109585237A true CN109585237A (en) | 2019-04-05 |
| CN109585237B CN109585237B (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811347877.2A Active CN109585237B (en) | 2018-11-13 | 2018-11-13 | Novel hollow cathode heater structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110335794A (en) * | 2019-05-24 | 2019-10-15 | 北京控制工程研究所 | A kind of lanthanum hexaboride hollow cathode heater heater strip cold end outbound course |
| CN111699539A (en) * | 2019-12-23 | 2020-09-22 | 深圳联影医疗科技有限公司 | Radiotherapy equipment and microwave source thereof |
| CN112689345A (en) * | 2020-12-24 | 2021-04-20 | 上海空间推进研究所 | Hollow cathode induction type heater and hollow cathode structure |
| CN114513868A (en) * | 2022-02-18 | 2022-05-17 | 哈尔滨工业大学 | Electric heater assembly of electric propulsion hollow cathode |
| CN114718830A (en) * | 2022-04-13 | 2022-07-08 | 哈尔滨工业大学 | Working medium-free annular hot wire cathode |
| CN115234458A (en) * | 2022-06-15 | 2022-10-25 | 北京航空航天大学 | Reusable small hollow cathode based on double-spiral heater structure |
| CN111699539B (en) * | 2019-12-23 | 2024-07-02 | 上海联影医疗科技股份有限公司 | Radiotherapy equipment and microwave source thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110335794A (en) * | 2019-05-24 | 2019-10-15 | 北京控制工程研究所 | A kind of lanthanum hexaboride hollow cathode heater heater strip cold end outbound course |
| CN110335794B (en) * | 2019-05-24 | 2021-04-13 | 北京控制工程研究所 | Cold end extraction method of lanthanum hexaboride hollow cathode thermion heating wire |
| CN111699539A (en) * | 2019-12-23 | 2020-09-22 | 深圳联影医疗科技有限公司 | Radiotherapy equipment and microwave source thereof |
| EP4065217A4 (en) * | 2019-12-23 | 2022-12-07 | Shanghai United Imaging Healthcare Co., Ltd. | Radiotherapy device and microwave source thereof |
| CN111699539B (en) * | 2019-12-23 | 2024-07-02 | 上海联影医疗科技股份有限公司 | Radiotherapy equipment and microwave source thereof |
| CN112689345A (en) * | 2020-12-24 | 2021-04-20 | 上海空间推进研究所 | Hollow cathode induction type heater and hollow cathode structure |
| CN114513868A (en) * | 2022-02-18 | 2022-05-17 | 哈尔滨工业大学 | Electric heater assembly of electric propulsion hollow cathode |
| CN114513868B (en) * | 2022-02-18 | 2022-09-09 | 哈尔滨工业大学 | Electric heater assembly of electric propulsion hollow cathode |
| CN114718830A (en) * | 2022-04-13 | 2022-07-08 | 哈尔滨工业大学 | Working medium-free annular hot wire cathode |
| CN114718830B (en) * | 2022-04-13 | 2024-05-10 | 哈尔滨工业大学 | Working medium-free annular hot wire cathode |
| CN115234458A (en) * | 2022-06-15 | 2022-10-25 | 北京航空航天大学 | Reusable small hollow cathode based on double-spiral heater structure |
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| CN109585237B (en) | 2021-06-04 |
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