Low Vibration 4K Two-stage Pulse Tube Cryocooler
Sumitomo Heavy Industries, Ltd.(SHI)has been developing 4K pulse tube cryocoolers for cooling MRI Magnet Systems, Small Superconducting Magnets, SQUIDs, X-ray detectors, etc.The valve unit of the cryocoolers is separated from the cold head by a self-sealed coupling. With this configuration, the maintenance for the valve unit becomes much easier and faster than that with a unified one since it is not necessary to warm up the cold head and cool down again.The vibration from the compressor and valve unit can be reduced by this configuration with some simple techniques.The vibration displacement has been reduced by optimizing the wall thickness of regenerators and pulse tubes.The vibration displacement has also been reduced by separated the regenerators and pulse tubes with a thin tube so that the vibration displacement from regenerators and pulse tubes does not interfere with each other. The typical vibration displacement is less than ±3μm with minimum impact on performance. The simulation results and experimental data are reported in this paper.
Xu M Y Takayama H Yamanouchi H
Engineering Department,Cryogenics Division,Sumitomo Heavy Industries,Ltd.2-1-1,Yato-cho Nishi-tokyo-city,Tokyo 188-8585,Japan
国际会议
上海
英文
120-125
2008-04-05（万方平台首次上网日期，不代表论文的发表时间）