Positioning device and method for porous grid electrode of microminiature ion thruster
A technology of ion thruster and positioning device, which is applied in the direction of thrust reverser, ion beam tube, and plasma utilization. Solve the problems of extreme system reliability and service life, achieve the effect of simple and easy disassembly process, reduce inert mass, and meet the effect of large-scale production
Pending Publication Date: 2022-03-04
BEIHANG UNIV
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Problems solved by technology
This method has very high requirements on the machining accuracy of the positioning holes and positioning pins, which increases the processing difficulty and cost of the grid system, thereby affecting the large-scale commercialization of ion thrusters; and requires that the positioning holes and positioning pins must be assembled in a Interference fit may cause residual stress inside the grid system when the positioning pin is positioned, reducing the reliability and service life of the grid system; positioning accuracy and convenience cannot be taken into account at the same time
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[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only for illustration and are not intended to limit the present invention.
[0032] like Figure 1-7 As shown, the positioning device of the porous grid of the micro-miniature ion thruster of the present invention is a three-positioning groove type, mainly composed of an accelerating grid 1, an insulating part 2 between grids, a screen grid 3, and a base 4. The positioning structure is composed of a base 4 and three positioning parts 401. The grid structure is composed of a screen grid 3, an insulating part 2, and an acceleration grid 1. The grid structure and the positioning structure are installed together. The grid structure and the positioning structure are in common A grid system with three positioning slots is formed.
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The invention provides a device and a method for positioning a porous grid of a microminiature ion thruster, the device comprises an acceleration grid, an inter-grid insulating part, a screen grid and a base provided with three positioning parts, and the acceleration grid, the inter-grid insulating part and the screen grid are all provided with positioning grooves matched with the three positioning parts. According to the positioning device and method, the requirement for the machining precision of the positioning groove and the positioning structure is low, the positioning structure is detachable, the inert mass is reduced, non-interference fit is adopted, and the assembling and disassembling difficulty is reduced while the structural working strength is guaranteed.
Description
technical field [0001] The invention relates to the field of space electric propulsion, in particular to a positioning device and method for a porous grid of a miniature ion thruster. Background technique [0002] Space electric propulsion systems generate thrust by ionizing and accelerating plasma. Ion thrusters are currently one of the most widely used types of space electric thrusters. They have the advantages of high specific impulse and high efficiency, so they are widely used in deep space exploration, satellite platform attitude, orbit control and other tasks. [0003] The ion thruster and ion source are mainly composed of discharge chamber and ion optical system. Among them, the ionization chamber is a cavity shaped as a cylinder, a cone or a combination of the two, and the ion optical system is composed of at least two grids (currently a double grid system is commonly used), and the double grid system includes a screen grid, an acceleration grid and a grid. The in...
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IPC IPC(8): F03H1/00H01J27/02
CPCF03H1/0087H01J27/022
Inventor 王伟宗许银龙刘伟王海波付宸聪
Owner BEIHANG UNIV