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A Superconductor Cooling Structure for Superconducting Magnetic Levitation Micro Thrust Measurement System

A measurement system and magnetic levitation technology, applied in superconducting magnets/coils, force/torque/work measuring instruments, and measuring the traction/propulsion power of vehicles, etc. Improved cooling efficiency and reduced friction loss

Active Publication Date: 2019-02-22
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to solve the problem of superconducting stator cooling in the magnetic levitation micro-thrust measurement system

Method used

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  • A Superconductor Cooling Structure for Superconducting Magnetic Levitation Micro Thrust Measurement System
  • A Superconductor Cooling Structure for Superconducting Magnetic Levitation Micro Thrust Measurement System
  • A Superconductor Cooling Structure for Superconducting Magnetic Levitation Micro Thrust Measurement System

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Embodiment Construction

[0023] The core structure of the invention is the conductive cooling structure of the superconducting stator array between the GM refrigerator and the permanent magnetic levitation ring.

[0024] First of all, ensure the correct design and installation of the structure. In order to reduce the eddy current loss of the metal parts, the cooling base 2 and the cooling copper ring 4 are rationally designed so that the minimum distances H and L between the permanent magnetic levitation ring 7 and the two are greater than 60mm during operation. In order to fully utilize the Meissner effect to suppress the eddy current friction loss of the cooling copper ring 4 and the cooling base 2, the width Wpm of the permanent magnetic levitation ring 7 must be smaller than the width Ws of the superconducting stator array, and the depth h of the groove of the cooling copper ring 4 must not exceed 3mm, the edge step width does not exceed 1.5mm. The cooling base 2 and the refrigerator 1 are compre...

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Abstract

The invention discloses design of a special superconductor low-temperature cooling structure applied to a superconductive magnetic suspension micro thrust measurement system. The superconductor low-temperature cooling structure comprises a refrigerator, a cooling base, a cooling copper column, a cooling copper ring, a superconductive stator array, an Al<2>O<3> ceramic cover plate, an indium sheet, graphite gaskets, an anti-radiation screen and the like. Specific to the requirements of high cooling efficiency and low eddy current loss of the cooling structure of the measurement system, a dual-path conduction cooling structure with low eddy current effect is designed; according to the cooling structure, the heat conduction gaskets capable of lowering contact heat resistance are arranged on the respective contact surfaces of corresponding parts, and by virtue of setting of the anti-radiation screen, radiation heat flow from the exterior can be isolated; and when the measurement system is in use, the Al<2>O<3> ceramic cover plate and the graphite gaskets with a weak eddy current effect are positioned in a region with severe magnetic field changes, while the cooling base, the cooling copper ring and the cooling copper column with an obvious eddy current effect are isolated from the region, so that the eddy current loss of the conduction cooling structure is suppressed by virtue of the conduction cooling structure layout.

Description

technical field [0001] The patent of the present invention relates to a high-efficiency cooling structure design, especially a superconductor cooling structure applied to a superconducting magnetic levitation micro-thrust measurement system. Background technique [0002] The thrust performance evaluation of space propulsion devices such as electric thrusters mainly relies on micro-thrust measurement systems. Generally speaking, the thrust provided by the electric thruster is very small, only in the order of uN to mN, which requires the micro-thrust measurement system to have high precision and good sensitivity. With its non-contact and low friction characteristics, the superconducting magnetic levitation micro-thrust measurement system has good sensitivity and precision, and can meet the measurement requirements of mN level micro-thrust. The performance of this type of measurement system is largely influenced by the temperature of the superconducting stator. The levitation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/04G01L5/13
CPCG01L5/133H01F6/04
Inventor 杨文将
Owner BEIHANG UNIV
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