Optimization design of turbo-expander gas bearing for a 500W helium refrigerator

Cryogenic Engineering Conference 2017

材料科学;物理学

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

Institute of Plasma Physics Chinese Academy of Sciences, Shushanhu Road 350, Hefei, Anhui

230031, China^1

关键词: Core technology;    Helium refrigerators;    Optimization design;    Performance study;    Processing technologies;    Stable operation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012025/pdf
DOI  :  10.1088/1757-899X/278/1/012025

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Turbo-expander is the core machinery of the helium refrigerator. Bearing as the supporting element is the core technology to impact the design of turbo-expander. The perfect design and performance study for the gas bearing are essential to ensure the stability of turbo-expander. In this paper, numerical simulation is used to analyze the performance of gas bearing for a 500W helium refrigerator turbine, and the optimization design of the gas bearing has been completed. And the results of the gas bearing optimization have a guiding role in the processing technology. Finally, the turbine experiments verify that the gas bearing has good performance, and ensure the stable operation of the turbine.