Cryogenic cooling system for high-temperature superconducting motor rotors

Abstract

The invention discloses a cryogenic cooling system for high-temperature superconducting motor rotors, which includes a vacuum vessel, a refrigerator, a cold header heat exchanger, a liquid collectioncavity, a refrigerant transmission pipe, a magnetic fluid sealing device, a heat insulation component, a liquid neon gasification chamber and a gas storage tank. Liquid neon is selected as a cryogeniccooling medium of a high-temperature superconducting magnet. The cryogenic refrigerator, the liquid collection cavity, the refrigerant transmission pipe, the liquid neon gasification chamber and other components constitute a closed circulation system based on the thermal siphon principle to provide continuous cold for the high-temperature superconducting magnet. At the cryogenic refrigerator side, neon is liquefied into liquid neon which is transmitted to the liquid neon gasification chamber through the refrigerant transmission pipe. At the liquid neon gasification chamber side, the liquid neon is gasified to absorb the heat brought by the high-temperature superconducting magnet and the external environment, and the neon formed by gasification is transmitted to the cryogenic refrigeratorside through the refrigerant transmission pipe. The neon is liquefied again, and a closed cycle is formed. Compared with the forced convective circulation of cold helium, the input of a helium pump isomitted, and the economy is improved.

Description

technical field [0001] The invention belongs to the field of low-temperature technology for superconducting applications, and in particular relates to a low-temperature cooling system for a high-temperature superconducting motor rotor. Background technique [0002] Since the discovery of high-temperature superconducting materials in 1986, high-temperature superconducting materials have developed rapidly and have attracted the follow-up development of many countries in the world. The development and application fields of superconducting wires are becoming more and more extensive, such as superconducting current limiters and superconducting cables. , superconducting motors, superconducting magnetic energy storage, etc. At present, the high-temperature superconducting wires that have been commercially operated mainly include the first-generation Bi-series superconducting wires and the second-generation Yi-series high-temperature superconducting wires. The working temperature o...

AI Technical Summary

Problems solved by technology

However, due to the heat leakage of the cryogenic container itself and the conduction heat of the current lead, it is necessary to continuously replenish liquid nitrogen, and the working temperature of the magnet is around 77K, which cannot meet the requirements of the 30K temperature zone.

[0005] 2. Direct conduction cooling of superconducting magnets through cryogenic refrigerators. This method is simple and direct, but it cannot be applied to rotating superconducting motor rotors, especially at high linear speeds.

The main problems are: the high cost of the helium pump, the high operating pressure of the system and the complexity of the system

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