A high-power Hall thruster discharge chamber assembly based on flexible connection

Abstract

The invention discloses a high-power Hall thruster discharge chamber assembly based on flexible connection, which is composed of a hand-in-hand inner ceramic ring, a hand-in-hand outer ceramic ring, an outer pressure ring, an inner pressure ring and an anode with grooves; Both the insert-type inner ceramic ring and the outer ceramic ring are closed-loop rings composed of multiple ceramic pieces connected end to end; each ceramic piece is an arc-shaped structure with a matching head protrusion and tail depression; the insert-type inner ceramic ring The lower end surfaces of the inner and outer ceramic rings of the inserting type have protrusions, which are embedded in the inner and outer annular grooves provided by the anode; the upper end surfaces of the inner and outer ceramic rings of the inserting type are pressed by the inner and outer pressure rings; the inner and outer pressure rings The other end is fixed on the inner and outer magnetic pole plates; the pressing of the inner pressure ring and the outer pressure ring is elastic. The invention can realize the release of thermal stress under the condition of high-power discharge, ensures the stable and reliable operation of the thruster, and avoids the technical difficulty of one-time forming under large size.

Description

technical field [0001] The invention belongs to the technical field of spacecraft propulsion, and in particular relates to a flexible connection-based high-power Hall thruster discharge chamber assembly for space. Background technique [0002] High propulsion power ratio is the basic requirement to meet high-power electric propulsion tasks. The tasks of using high-power electric propulsion mainly include manned cargo spacecraft to the moon, on-orbit service transfer between orbits, manned deep space exploration and other tasks. These tasks all require greater thrust to reach the predetermined orbit as soon as possible. Compared with electric thrusters such as ion thrusters (30mN / kW), magnetoplasma propulsion (10mN / kW), and variable specific impulse magnetoplasma propulsion (25mN / kW), the Hall thruster has the highest thrust power ratio, reaching 45-66mN / kW, it is the first choice to meet future tasks. [0003] Two ceramic sleeves with different radii are fixed on the same...

AI Technical Summary

Problems solved by technology

Compared with low and medium power, the diameter of the discharge chamber of the Hall thruster under high power increases greatly. If the ceramic sleeve involved is directly integrally formed, it is very technically difficult; in addition, the working power of the high-power thruster often reaches Dozens of kW, or even hundreds of kW, will generate a lot of heat when it discharges, and a large part of this heat will be directly loaded on the ceramic walls on both sides of the discharge chamber that are in direct contact with it, making the ceramic walls bear great thermal stress , can easily cause damage to the ceramic wall

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