An ion thruster cone section annular magnetic steel installation structure

Abstract

The invention proposes a magnetic steel installation structure for the cone section of the annular magnetic steel ion thruster, which can avoid the jumping of the magnetic steel block when it is loaded into the magnetic steel box, and can effectively reduce the temperature of the magnetic steel and reduce the damage caused by the high temperature of the magnetic steel. magnetic loss. When installing the magnet, first weld part of the magnet cover and the magnet box to form an unclosed magnet block installation cavity, after filling the cavity with magnet blocks, install the last magnet cover, It is convenient to put the small magnetic steel block into the magnetic steel box, avoiding the jumping or cracking of the magnetic block caused by the magnetic pole repulsion or attraction between the magnetic blocks; the magnetic steel assembly and the anode cylinder of the cone section are screwed and fixed with zirconia insulating ceramic components, Ensure that the outer surface of the magnetic steel assembly and the anode cylinder of the conical section maintains a gap of 0.8mm to 1.5mm, avoiding direct contact between the magnetic steel assembly and the anode cylinder of the conical section, effectively reducing the temperature of the magnetic steel and reducing magnetic loss. At the same time, it can be adjusted by adjusting the ceramic The axial length of the assembly adjusts this clearance.

Description

technical field [0001] The invention belongs to the technical field of ion thruster installation, and in particular relates to an ion thruster cone segment annular magnetic steel installation structure. Background technique [0002] The ion thruster is a propulsion system that ionizes and accelerates the propellant working medium gas through electrothermal / static / electromagnetic action, and converts electrical energy into kinetic energy of the working medium. Compared with traditional chemical propulsion devices, ion thrusters have the advantages of high specific impulse, adjustable thrust, and long life, which can greatly reduce the amount of propellant carried and significantly increase the payload ratio. Application fields such as atmospheric damping compensation have been widely used. [0003] The magnetic field in the discharge chamber of existing tangential field ion thrusters is generally generated by permanent magnets. According to the shape, it can be divided into ...

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Problems solved by technology

[0003] The magnetic field in the discharge chamber of existing tangential field ion thrusters is generally generated by permanent magnets. According to the shape, it can be divided into ring magnets and cylindrical magnets. Compared with the latter, the former has the advantages of light discharge chamber, stable plasma discharge and beam current Good uniformity and other advantages, but ring magnets are difficult to process. The current installation method is to splice small pieces of magnets into a ring. This method has the following disadvantages: 1. Assembling magnets in an open magnet box is likely to cause magnetism 2. Due to its conical structure, the magnetic steel component of the cone segment, if the current method of isolating the discharge chamber with metal parts is adopted, the high temperature in the discharge chamber will directly act on the magnetic steel, resulting in magnetic loss of the magnetic steel. increase, affecting the performance of the discharge chamber

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