Development of a 4K Two-stage Pulse Tube Cryocooler
Development of a 4K Two-stage Pulse Tube Cryocooler
复制标题
4K 两级脉冲管制冷机的开发
DOI：
10.1007/0-306-47919-2_40
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
R. Li
中科院分区：
文献类型：
--
作者：
M. Xu;P. Yan;T. Koyama;T. Ogura;R. Li
住友重工业株式会社（SHI）一直在开发用于冷却MRI磁体系统、小型超导磁体、SQUID、X射线探测器等的4K脉冲管制冷机。制冷机的阀单元通过自密封耦合器与冷头分离。通过这种配置，阀单元的维护变得比使用统一的阀单元更容易和更快，因为不需要预热冷头并再次冷却。这种配置可以通过一些简单的技术来减少压缩机和阀门单元的振动。典型的冷却能力在第二阶段为0.9W（4.23K），同时在第一阶段为40 W（45.9K）。研究了充液压力、工作频率等因素对性能的影响。用激光位移传感器测量了SHI-4K型脉管制冷机的振动。
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. A typical cooling capacity is of 0.9W at 4.23 K at the second stage and 40W at 45.9 K at the first stage, simultaneously. The results of the influence on the performance by filling pressure, operating frequency are reported. The vibration of a SHI 4K pulse tube cryocooler is measured with a laser displacement sensor.