Self-adaptive clamp for superconductive multi-strand wire

Abstract

The invention discloses a self-adaptive clamp for a superconductive multi-strand wire. The self-adaptive clamp comprises a support shaft, a moveable control component, a clamp cover, a conical chamber and a plurality of wedge-shaped clamp blocks which are annularly and uniformly distributed at the lower end of the conical chamber, wherein a pressure bearing is arranged on a middle part of the moveable control component connected with the support shaft; a snap spring is arranged at the upper end, so that the positions of the moveable control component and the support shaft are relatively fixed; an inner wall of the moveable control component is connected with the upper part of the clamp cover through a thread; the lower part of the clamp cover is fixedly connected with the conical chamber; a test piece is placed at a clamp opening; the moveable control component is rotated for driving the clamp cover and the conical chamber to wholly upward or downward move, so that an annular opening at the lower end of the conical chamber is upward moved and the wedge-shaped clamp blocks are gathered toward the center so as to clamp the superconductive multi-strand wire or the annular opening at the lower end of the conical chamber is downward moved and the wedge-shaped clamp blocks are dispersed so as to release the superconductive multi-strand wire. The self-adaptive clamp can supply annularly uniform distributed clamping force; all the strands can be uniformly stressed; the relative sliding of the strands in the multi-strand wire can be avoided; the accuracy of the experimental data can be guaranteed; the application scope is wide; the self-adaptive clamp can be normally used under normal temperature and low temperature environments.

Description

technical field [0001] The invention relates to an self-adaptive fixture, in particular to an self-adaptive fixture for performance testing of multi-strand multi-core wires (superconducting strands). Background technique [0002] Multi-core wires (strands) are widely used in power equipment. As the core component of superconducting magnets, superconducting cables in tubes (CICC) are mainly made of multi-level superconducting strands, which are responsible for superconducting The transmission of superconducting current inside the magnet works. Superconducting strands are the basic structural materials of large superconducting magnets, and their deformation mechanical properties under external loads are affected by various factors; especially in complex environments where multiple factors such as low temperature and strong electromagnetic fields are coupled, superconducting strands The comprehensive mechanical properties and behavior of the wire are directly related to the sa...

AI Technical Summary

Problems solved by technology

However, when clamping superconducting strands, due to the large clamping force of the hydraulic clamp, the strands in the clamping part will be greatly deformed; at the same time, the clamping part of the hydraulic clamp is also a flat chuck or a V-shaped chuck. , which also causes different degrees of strain and slippage in each strand, resulting in distortion of the measured strand experimental data

For the experiment of superconducting strands at low temperature, the hydraulic clamp cannot work in a low temperature (liquid nitrogen) environment due to the limitation of its principle, and the clamp must be placed outside the cryogenic box, so that the length of the superconducting strand is doubled increase, resulting in unnecessary waste of superconducting wires and an increase in cost

[0005] In the process of realizing the present invention, we found that the existing clamps at least cannot provide uniform distribution or sufficient clamping force, so that the strands of the superconducting strands will slip or shift relative to each other, resulting in distortion of the experimental data of the strands measured , and defects such as changes to the shape and structure of superconducting strands

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