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Patents alert: cryogenic refrigerator.

Author(s) : YUAN J., MAGUIRE J. F., SIDI-YEKHLEF A., et al.

Type of article: Article

Summary

A cryogenic refrigerator for cooling a rotating device includes a stationary regenerator, and a rotatable cold heat exchanger coupled to the stationary regenerator to rotate relative thereto. The cryogenic refrigerator is, for example, of the Gifford-McMahon type or pulse tube type. In the Gifford-McMahon type, a stationary cylinder houses the regenerator, and a rotatable cylinder mounted to the cold heat exchanger is concentrically arranged about the stationary cylinder. Alternatively, the rotatable cylinder is axially offset of the stationary cylinder. A seal, for example, a ferrofluidic seal, is located between the stationary and rotatable cylinders. In the pulse-tube type, a pulse tube is concentrically arranged about the regenerator, and the cold heat exchanger includes a stationary portion coupled to the regenerator and a rotatable portion coupled to the pulse tube. A back-up valve system is provided for increased reliability.

Details

  • Original title: Patents alert: cryogenic refrigerator.
  • Record ID : 2004-2076
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 23 - n. 18
  • Publication date: 2003/12

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