High-temperature superconducting binary current lead based on conduction cooling

Abstract

The invention provides a conduction cooling type high-temperature superconducting binary current lead which is simple in process and convenient to install, and particularly relates to a structure of the high-temperature superconducting binary current lead. The whole high-temperature superconducting binary current lead comprises an indoor temperature copper connector, a copper lead section, a connection transition section, a superconducting combination section and a low temperature copper connector, and is characterized in that a two-stage refrigerating machine is adopted for the whole current lead for conduction cooling, the structure is simple, the cooling effect is good, and installation is convenient. Meanwhile, the conduction cooling type high-temperature superconducting binary current lead is wider in application range relative to gas cooling, for example, the conduction cooling type high-temperature superconducting binary current lead can be applied to a superconducting fan. The superconducting combination section of the current lead is formed by welding finished superconducting strips and a copper braided strap, the current lead can be obtained by increasing or decreasing the number of the superconducting strips in parallel connection according to the demands of users for the magnitude of currents, machining and installation processes are simplified, materials are saved, and cost of the lead is saved.

Description

technical field [0001] The invention relates to a high-temperature superconducting current lead, in particular to a high-temperature superconducting binary current lead based on conduction cooling. Background technique [0002] Current leads are used to connect the magnet assembly to the room temperature power supply. The current superconducting magnet device needs to work in a low-temperature environment. Therefore, the heat leakage from room temperature into the low-temperature environment through the current lead is the main heat load of the low-temperature environment, and affects the stability of the low-temperature environment and determines the power consumption for maintaining the low-temperature environment. If the superconducting magnet uses unary copper current leads and uses helium cooling, the design of the entire cooling system is complicated, the cost is high, and the heat leakage to the low temperature environment is relatively large. Under the premise of sa...

AI Technical Summary

Problems solved by technology

[0005] At present, for the conduction-type binary current lead that abandons gas cooling, since most of its superconducting section adopts inflexible design, this lead cannot be flexibly routed and installed inside the vacuum dewar, especially for complex low-temperature environments. Space is already crowded with multiple layers of vacuum insulation

At the same time, due to the cooling of the cold head, the traditional binary current leads involve thermal connection and electrical insulation. In most cases, it is impossible to ensure that both effects are good at the same time.

These problems greatly limit the application of conductive binary current leads in high current and fine low temperature spaces

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