A three-ring vacuum arc thruster

A thruster and vacuum arc technology, which is applied to aircraft, aerospace vehicles, and space vehicle propulsion system devices, etc. and life expectancy improvement

Active Publication Date: 2019-03-15
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current single-cathode and single-anode coaxial vacuum arc thrusters have a small cathode ablation area, resulting in a short service life and low reliability of the thruster. At the same time, the divergence angle of the plume is large due to the space charge effect, which affects the thruster. performance

Method used

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  • A three-ring vacuum arc thruster
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  • A three-ring vacuum arc thruster

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Embodiment 1, with reference to figure 1 , 2 , 3, a three-ring vacuum arc thruster, the thruster includes a cylindrical cathode 6 placed in the center (the cylindrical cathode structure is conducive to the uniform ablation of the cathode material, thereby prolonging the life of the thruster), the cylindrical cathode 6. The insulator II5, the common anode 4, the insulator I3 and the outer ring cathode 2 are arranged concentrically on the outer circumference; the cylindrical cathode 6, the insulator II5, the common anode 4, the insulator I3 and the outer ring cathode 2 are installed on the installation base in sequence The cylindrical cathode installation groove 11, the insulator II installation seat 10, the common anode installation groove 9, the insulator I installation seat 8 and the outer ring cathode installation groove 7; the cylindrical cathode installation groove 11, the common anode installation groove 9 , Outer ring cathode installation groove 7 three equal hei...

Embodiment 2

[0013] Embodiment 2. On the basis of Embodiment 1, insulating rings and cathode rings are sequentially added as required to form a vacuum arc thruster with a multi-ring structure, so as to expand the power of the thruster and expand the application range of the thruster.

[0014] When the thruster is working, the voltage peak generated by the power processing unit breaks down the metal conductive films on the end faces of the two insulators at the same time, inducing the main discharge between the cathode and anode of the two groups. The resulting plasma ions are accelerated by mechanisms such as aerodynamics and electron-ion friction to generate thrust.

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Abstract

A three-ring vacuum arc thruster, the thruster includes a cylindrical cathode placed in the center, and an insulator II, a common anode, an insulator I and an outer ring cathode are concentrically arranged on the periphery of the cylindrical cathode in turn; the cylindrical cathode, The insulator II, the common anode, the insulator I and the outer ring cathode are sequentially installed in the cylindrical cathode installation groove of the installation base, the insulator II installation seat, the common anode installation groove, the insulator I installation seat and the outer ring cathode installation groove; The outer end surface of the installation base is sequentially provided with a cylindrical cathode terminal, a common anode terminal and an outer ring cathode terminal from the center; the cathode terminal and the outer ring cathode terminal are connected to the negative pole of the power supply, and the common anode terminal Connect to the positive pole of the power supply; the end faces of the insulator I and the insulator II in the installation base are plated with a metal conductive film. The invention improves thruster efficiency and increases thruster life.

Description

technical field [0001] The invention relates to a three-ring vacuum arc thruster used in space, belonging to the technical field of spacecraft propulsion. Background technique [0002] In recent years, satellites have been developing in the direction of low cost and distributed. Micro-nano satellites have the advantages of low cost, short development cycle, strong expansion capability, and flexible launch methods. Micro-nano satellites have important application prospects and strategic significance for both civilian and military applications. The rapid development of micro-satellites and micro-nano-satellites has put forward high requirements for advancement. The vacuum arc thruster (VAT) has become an ideal type of electric propulsion for micro-nano satellites due to its advantages of small mass, high specific impulse, and simple structure. Micro-propulsion can mainly meet the propulsion needs of micro-nano satellites, mainly including: (1) damping compensation, orbit ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64G1/40
CPCB64G1/405F03H1/0087
Inventor 吴先明张天平任亮吴辰宸李啸天贾艳辉王尚民
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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