Gas supply and insulation integrated structure of space electric thruster

Abstract

The invention relates to the technical field of spaceflight electric propulsion, in particular to a gas supply and insulation integrated structure of a space electric thruster. The gas supply and insulation integrated structure comprises a gas distributor and a gas circuit insulation structure, and the gas circuit insulation structure is fixedly welded in a positioning hole in the lower end of the gas distributor. According to the gas supply and insulation integrated structure, a gas distributor and gas circuit insulation structure integrated mounting and welding manner is adopted, so that the mounting difficulty is effectively reduced, the connection reliability is improved, the gas leakage risk is avoided, the pipeline breakage risk in the mechanical environment is eliminated, the reliability of the space electric thruster is greatly improved, the height and the space size of the thruster are effectively reduced, the weight is reduced, the number of parts is reduced, the machining cost is reduced, and the requirements of commercial spaceflight multiple users for the low-power space electric thruster for low cost, light weight and high reliability are met.

Description

technical field [0001] The present application relates to the technical field of aerospace electric propulsion, and in particular, relates to an integrated gas supply and insulation structure for a space electric thruster. Background technique [0002] When the space electric thruster is working, an electric gas insulator must be installed on the gas supply pipeline of the working medium to suppress the breakdown caused by low pressure discharge, so as to ensure the normal operation of the electric thruster and avoid electrification of the satellite structure. The function of the Hall thruster gas distributor is to serve as a distributor for the injection of the working fluid gas in the discharge chamber at the bottom of the discharge chamber channel, and at the same time provide plasma discharge and accelerate the extraction of positive ions to generate thrust to a high positive potential, which is Hall One of the key components of the thruster, its performance is directly ...

AI Technical Summary

Problems solved by technology

[0003] Usually the gas distributor and the gas circuit electrical insulator are two independent components. The gas distributor is installed in the discharge chamber of the electric thruster, and its gas supply pipeline is inserted into the lower shell space, while the gas circuit electrical insulator is directly installed on the shell The connection of the two components adopts a flange structure, the gasket is sealed, and the connecting flange is screwed and fixed to connect the gas path. However, this structure is limited in the small power space electric thruster with a small space, resulting in limited operating space. Difficult to install, it is easy to cause the gasket to be skewed or the connection flange to be screwed unevenly, which will cause air leakage at the seal and cause the thruster to fail. In addition, in the mechanical environment, due to the large volume and mass of the flange, the swing amplitude of the external force is too large. There is a risk of pipe bending and breaking

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