Test device and test method of critical current of superconductive wires under mixed stress

Abstract

The invention provides a test device and a test method of critical current of superconductive wires under mixed stress. According to the device, electromagnet housings are fixed on left and right sides of a Dewar flask; an excitation coil is installed in an inner cavity of each electromagnet housing; an output shaft housing is installed on the top plate on the Dewar flask and penetrates through the top plate through a bearing; the main shaft of the motor is connected with a main gear; the main gear is engaged with a toothed ring fixed on the output shaft housing; a vertical servo motor is fixed on the top end of the output shaft housing; the output shaft of the vertical servo motor downwards penetrates through the output shaft housing and then is connected with an upper clamp; the upper clamp clamps the upper end of a superconductive wire; the lower end of superconductive wire is clamped by a lower clamp; the lower clamp is fixed on a fixed base at the bottom of the Dewar flask; a transverse servo motor is installed on a table top of a support table and is connected with a poly(tetrafluoroethylene) disc through a guidance rod and a force transmission rod; and the disc is arranged on the left side of the middle part of the superconductive wire. The test device is capable of testing the critical current of the superconductive wire under different bending radiuses, tension force, torsion angles and magnetic fields.

Description

technical field [0001] The invention relates to a testing device and testing method for critical current of a superconducting wire under mixed stress. Background technique [0002] The mechanical properties of superconducting wires are one of the important factors that determine the performance of superconducting wires. In the process of production and application, the stress on the superconducting wire is the joint action of many factors. For example, the tension, torsion, bending and electromagnetic force generated during the stranding process of making superconducting cables with superconducting wires will cause various strains in the superconducting wires, which will affect its critical performance. Secondly, there is generally a background magnetic field in the application of superconducting devices, that is, superconducting wires are in the force-electricity-magnetism multiphysics field. Through experimental tests, the influence of superconducting wires on their crit...

AI Technical Summary

Problems solved by technology

[0003] Existing test devices can only test the critical properties of superconducting wires under unidirectional stretching, tensile twisting, or tensile bending, and cannot test the critical properties of superconducting wires under the combined action of background magnetic field and strain.

Since its test conditions do not match the actual operating status of superconducting equipment, it is impossible to provide accurate and reliable experimental data for the design and maintenance of superconducting equipment

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