Research on the static performance of a gas thrust bearing for the eddy current brake helium turbo-expander

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Li, S.S.^1 ; Fu, B.^1 ; Zhang, Q.Y.^1

Cryogenic Engineering and Technology Division, Institute of Plasma Physics Chinese Academy of Sciences, P.O.Box 1126, Shushanhu Road 350, Hefei

ANHUI

230031, China^1

关键词: Bearing-rotor system;    Chinese Academy of Sciences;    Computational fluid dynamics simulations;    Continuous operation;    Critical technologies;    Eddy current brakes;    Helium refrigerators;    Static performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012054/pdf
DOI  :  10.1088/1757-899X/502/1/012054

来源: IOP

【 摘 要 】

As an important refrigeration component, the turbo-expander affects the continuous operation of the helium refrigerator. In order to improve the reliability of the refrigerator, a helium turbo-expander with the eddy current brake was designed by Institute of Plasma Physics Chinese Academy of Sciences. The axial support is the critical technology to ensure the stability of the bearing-rotor system for the turbo-expander. This study is based on the static gas thrust bearing of the home-made turbine, the performance of the bearing was investigated by computational fluid dynamics simulation. The findings in this paper can provide an important guideline for the optimal design of the thrust gas bearing.Published under licence by IOP Publishing Ltd.