A graphite high-temperature cathode device for electric thrusters

Abstract

The invention discloses a graphite high-temperature cathode device for an electric thruster, which comprises a cathode tube; an air supply flange fixed on the first end of the cathode tube, and a hollow channel is arranged in the center; the hollow channel communicates with the cathode tube; Holder, the cover is set outside the cathode tube, and the second end is insulated from the gas supply flange and the cathode tube; the emitter is set inside the second end of the cathode tube and matched with the cathode tube; the heater is sleeved on the The outside of the second end of the cathode tube covers the emitter and is behind the second end of the cathode tube to ensure that there is a certain gap between it and the first end of the contact electrode. This invention solves the problems of difficult connection process and low working life of the traditional hollow cathode structure. Graphite is selected as the material of the main structural parts such as the cathode tube, the contact electrode and the emitter support tube, and the assembly process is achieved through mechanical assembly and integrated processing. It is simple, reduces cost and weight, and increases the reliability and service life of the cathode device.

Description

technical field [0001] The invention relates to the technical field of space electric propulsion, in particular to a graphite high-temperature cathode device for an electric thruster. Background technique [0002] Compared with conventional chemical and cold air propulsion methods, the specific impulse of the electric thruster is an order of magnitude higher, which is extremely advantageous in applications with small thrust, high specific impulse, and long-term work, and can greatly reduce the amount of propellant carried and increase the payload , or significantly prolong the working life of the spacecraft without increasing the propellant, which can be used for space tasks such as attitude control and fine adjustment of small satellites, high-precision position maintenance of geostationary orbit satellites, and orbit transfer of high-orbit satellites. It is also the main propulsion of deep space exploration The best choice for the system. [0003] At present, the mainstre...

AI Technical Summary

Problems solved by technology

This system is designed to solve the problems of difficult connection process and low working life of the traditional hollow cathode structure. Graphite is selected as the material of the main structural parts such as the cathode tube, the contact electrode and the emitter support tube, and is processed through mechanical assembly to make the assembly Simple process, reduce cost, reduce weight, increase reliability and service life

Images