High-reliability hollow cathode structure for electric propulsion

A hollow cathode, electric propulsion technology, applied in the field of plasma physics and thermophysics, can solve the problem of uncontrollable start-up time

Inactive Publication Date: 2021-04-20
NO 12 RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above problems, the object of the present invention is to provide a hollow cathode structure for high r

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  • High-reliability hollow cathode structure for electric propulsion

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Embodiment Construction

[0023] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0024] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower" and so on is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed, or operate in a particular orientation, and th...

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Abstract

The embodiment of the invention discloses a high-reliability hollow cathode structure for electric propulsion. The hollow cathode structure comprises a touch holding pole with an ejection hole, a gas guide pipe, an emitter and a top hole plate are sequentially arranged along the axis of the ejection hole in the contact holding pole, the outer wall of the gas guide pipe comprises a heater, the cathode structure further comprises an inner electrode used for enhancing the electric field intensity of the surface of the emitter, and the inner electrode penetrates through the gas guide pipe and is arranged in an inner cavity of the emitter in an inserted manner. By means of the hollow cathode structure provided by the invention, the ignition time of the emitter can be effectively shortened, the controllability of the starting time of electric propulsion equipment is improved, and deteriorated substances on the surface of the emitter also can be removed in a short time, the performance of the emitter is made to be rapidly recovered, and the consistency of the hollow cathode ignition time and the controllability of the electric propulsion equipment are guaranteed.

Description

technical field [0001] The invention relates to the fields of plasma physics and thermophysics. More specifically, it relates to a hollow cathode structure for high reliability electric propulsion. Background technique [0002] As an advanced space propulsion technology, electric propulsion has been widely used on spacecraft such as the United States and Russia due to its high specific impulse advantage. It can reduce system quality, increase life, increase load, and improve orbit and attitude control accuracy. At present, the work of the mainstream electric propulsion system is based on the premise of the hollow cathode. The traditional hollow cathode structure mainly includes the emitter, the top hole plate, the heater, the contact pole and the air duct. Cavity, emitter inner cavity, the three inner cavities are connected, and are coaxially connected with the exit hole on the contact pole. The emitter is responsible for the ignition of the electric propulsion system, the ...

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Application Information

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IPC IPC(8): F03H1/00
Inventor 郝广辉邵文生张珂于志强
Owner NO 12 RES INST OF CETC
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