Testing device for suspension and guide characteristics of high-temperature superconducting bulk material under high temperature condition

A high-temperature superconducting and testing device technology, which is applied in the direction of using suspension technology for measurement and magnetic performance measurement, can solve the problems of slow cooling process, large volume, and difficulty, and achieve high temperature control accuracy, simple temperature control device, and low temperature. fast effect

Pending Publication Date: 2017-05-10
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] However, the existing high-temperature superconducting magnetic levitation characteristic measurement system in a variable temperature environment is realized by a refrigerator
Its disadvantages are: on the one hand, the cost of refrigeration equipment is high and the volume is large; on the other hand, because the actual suspension system makes full use of the magnetic field on the surface of the magnetic track, the bottom of the Dewar where the superconducting block is placed is thin to reduce the size of the superconducting block. Distance between material and magnetic track
This will lead to a decline in the thermal insulation performance of the Dewar, and make the cooling process slow and difficult in the case of complex arrangements of multiple superconducting blocks, making it difficult to fully evaluate the performance of the suspension system at different temperatures

Method used

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  • Testing device for suspension and guide characteristics of high-temperature superconducting bulk material under high temperature condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Test method for suspension and guiding characteristics of high-temperature superconducting bulk material at liquid nitrogen temperature

[0022] A. Set the quantity and arrangement of superconducting blocks 19 in the Dewar 17 through the Dewar flange 16;

[0023] B. Start the horizontal direction servo motor 2, so that the transmission screw 14 drives the horizontal direction slider 13, so that the Dewar 17 moves in the horizontal direction, and the horizontal direction initial position of the experiment is set;

[0024] C. Start the vertical direction servo motor 5, so that the transmission screw 7 of the vertical direction servo motor 5 drives the vertical direction slider 8, and make the Dewar 17 move in the vertical direction, thereby setting the initial vertical direction of the experiment Location;

[0025] D. Monitor the temperature of the superconducting block through the temperature collection port 11;

[0026] E. Open the vent valve 12, and open t...

Embodiment 2

[0030] Example 2: Test method for the suspension and guiding characteristics of high-temperature superconducting bulk materials within a certain range below the temperature of liquid nitrogen

[0031] A. Set the quantity and arrangement of the superconducting blocks 19 in the Dewar 17 through the Dewar flange 16, and set the experimental temperature on the numerically controlled vacuum pump 4;

[0032] B. Start the horizontal direction servo motor 2, so that the transmission screw 14 of the horizontal direction servo motor 2 drives the horizontal direction slider 13, so that the Dewar 17 moves in the horizontal direction, and sets the horizontal direction initial position of the experiment;

[0033] C. Start the vertical direction servo motor 5, so that the transmission screw mandrel 7 of the vertical direction servo motor drives the vertical direction slider 8, so that the Dewar 17 moves in the vertical direction, and sets the vertical direction initial position of the experim...

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Abstract

The invention discloses a testing device for suspension and guide characteristics of a high-temperature superconducting bulk material under a high temperature condition. The testing device is composed of a space positioning system, a temperature control system and a data acquisition system. In a temperature control process of the temperature control system, a pumping speed of a numerical control vacuum pump is controlled, so that surface steam pressure of liquid or solid nitrogen in a Dewar equipped with the high-temperature superconducting bulk is controlled; the aim of accurately controlling a working temperature of the superconducting bulk is realized by utilizing a liquid-gas and solid-gas phase-change heat absorption and cooling principle of nitrogen. The temperature control range is 77K-53K and the control precision is + / -0.1K. The space positioning system and the data acquisition system are combined; and the testing device can be used for measuring the suspension and guide characteristics of the single high-temperature superconducting bulk material or the plurality of high-temperature superconducting bulk materials with different arrangement manners in the temperature range of 77K-53K.

Description

technical field [0001] The invention relates to special equipment for high-temperature superconducting tests, in particular to a test method for the suspension and guiding characteristics of high-temperature superconducting bulk materials under variable temperature conditions. Background technique [0002] The suspension system composed of high-temperature superconducting blocks and permanent magnets is expected to be widely used in superconducting bearings, superconducting flywheel energy storage systems and high-temperature superconducting magnetic levitation vehicles due to its small size, large suspension force, and strong self-stability. and many other fields. [0003] However, on the one hand, in the production and preparation of high-temperature superconducting and permanent magnet materials, it is difficult to accurately control the intrinsic defects of the materials, resulting in an inevitable deviation of more than 10% in their performance; in addition, the shape a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/12
CPCG01R33/1261
Inventor 赵立峰计常伟赵勇
Owner SOUTHWEST JIAOTONG UNIV
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