低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
研究論文
小型冷凍機の振動解析
都丸 隆行鈴木 敏一春山 富義新冨 孝和山本 明小山 知大李 瑞松原 洋一
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2003 年 38 巻 12 号 p. 693-702

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The vibrations of a Gifford-McMahon (GM) and pulse-tube (PT) cryocoolers were measured and analyzed. The vibrations of the cold stage and cold head were measured separately to investigate their vibration mechanisms. The measurements were performed while maintaining the thermal conditions of the cryocoolers at a steady state. We found that the vibration of the cold head for the 4 K PT cryocooler was two orders of magnitude smaller than that of the 4 K GM cryocooler. On the other hand, the vibration of the cold stages for both cryocoolers was of the same order of magnitude. From a spectral analysis of the vibrations and a simulation, we concluded that the vibration of the cold stage is caused by elastic deformation of the pulse tubes (or cylinders) due to the pressure oscillation of the working gas.

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© 2003 公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
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