Hollow cathode heater with heat preservation function

Abstract

The invention provides a hollow cathode heater with a heat preservation function. A heat shield component is integrated outside a heater component of a hollow cathode; a cavity between an outer sleeveand an inner sleeve is divided into two sub-cavities; heat preservation materials are filled in the sub-cavities; and sealing of the heat shield component is achieved by a bottom plate and a top cover at the two ends of the sleeves. Axial and radial radiation heat of a hollow cathode is effectively reflected step by step by arranging different thermal insulation layers, so that the heat conduction area of the hollow cathode is reduced; the heat efficiency of the heater component of the hollow cathode can be improved; and the discharge voltage of the hollow cathode during self-maintained discharge can be reduced. In addition, a contact holding pole and the heater component of the hollow cathode are respectively mounted inside and outside the heat shield component, so that an insulation distance between the contact holding pole and the heater component of the hollow cathode is increased; a discharge phenomenon generated due to a too close distance of the contact holding pole and the heater component can be prevented; and the structural complexity of the contact holding pole of the hollow cathode can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of propulsion systems of space vehicles, and in particular relates to a hollow cathode heater with heat preservation function. Background technique [0002] With the advancement and development of science and technology, human beings explore space more deeply. The electric propulsion system is called green propulsion technology, and it has been used more and more in space technology. It is mainly used for orbit transfer and orbit maintenance of space vehicles. , attitude control, potential control, etc., long life and high reliability are the basic requirements of space vehicles for electric propulsion systems. As the core component of the electric propulsion system, the hollow cathode determines the on-orbit working life of the electric propulsion system and the spacecraft. Therefore, reducing the self-sustained operating voltage of the hollow cathode and improving the life and reliability of the hollow ca...

AI Technical Summary

Problems solved by technology

In this structure, after the hollow cathode works for a long time, the metal foil will have problems such as embrittlement and oxidation of the metal foil, and a series of problems such as the thermal efficiency of the hollow cathode and the increase in the working voltage of the hollow cathode will seriously affect the life and reliability of the hollow cathode.

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