Experimental study on a one-stage Vuilleumier cryocooler with large pressure ratio

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Tong, Zhang^1,2 ; Changzhao, Pan^1,2 ; Liubiao, Chen^1,2 ; Wenxiu, Zhu^1 ; Yuan, Zhou^1 ; Junjie, Wang^1

Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China^1

University of Chinese Academy of Sciences, Beijing, China^2

关键词: Cooling Capacity;    Cryocoolers;    Displacers;    Labyrinth sealing;    Liquid helium temperature;    No load;    Pressure ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012077/pdf
DOI  :  10.1088/1757-899X/171/1/012077

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A detailed experimental results of one-stage VM cryocooler with larger pressure ratio is presented and discussed in this paper. By increasing the stroke distance of hot displacer from 20 mm to 32 mm, the pressure ratio raised to 1.8 at the terminal temperature. Besides, TFL-spring combined with labyrinth sealing was used on cold displacer. Finally, a no-load temperature of 7.55 K was attained and the cooling capacity is 1.98 W@15 K. Although the terminal temperature was not apparently improved, it still showed great potential to reach liquid helium temperature when adding an extra stage.