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Analyse vibratoire des cryoréfrigérateurs.

Vibration analysis of cryocoolers.

Auteurs : TOMARU T., SUZUKI T., HARUYAMA T., et al.

Type d'article : Article

Résumé

The vibrations of 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. The authors 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, the authors concluded that the vibration of the cold-stage is caused by an elastic deformation of the pulse tubes (or cylinders) due to the pressure oscillation of the working gas.

Détails

  • Titre original : Vibration analysis of cryocoolers.
  • Identifiant de la fiche : 2005-1089
  • Langues : Anglais
  • Source : Cryogenics - vol. 44 - n. 5
  • Date d'édition : 05/2004

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