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Development Progress of a Long Life Twin Piston Pressure Oscillator

  • A. Ravex
  • L. Duband
  • P. Rolland
Chapter
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 39)

Abstract

A development program of cryocoolers for space applications is currently in progress at the French Atomic Commission (CEA).

The main feature of these cryocoolers is the use of hydrodynamic gas bearings working at low rotational speed (a few Hz). Sliding friction for bearing or sealing is thus avoided and we expect a mean time between failure over 5 to 10 years.

Using this technique a simplified single piston oscillator has been built for the validation of the technical concepts and the characterisation of the components. Results on the hydrodynamic gas bearing, linear drive motor, resonance and compression ratio of this oscillator are reported.

A twin piston pressure oscillator for a Stirling cryocooler has then been designed, manufactured and is currently being tested. In this oscillator, each piston is sustented by a single gas bearing, kept in rotation by a brushless motor and axially actuated by a linear motor.

This paper reports on the status of these developments.

Keywords

Linear Motor Active Magnetic Bearing Mean Time Between Failure Charge Pressure Brushless Motor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    R. G. Ross, Requirements for long-life mechanical cryocoolers for space application, Cryogenics 30: 233 (1990)CrossRefGoogle Scholar
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    C. Keung, P. J. Patt, M. Starr and R. McFarlane, Performance of a prototype, 5 year lifetime, Stirling cycle refrigerator for space applications, Proc. Sixth International Cryocoolers Conference, Plymouth MA (USA) 1: 53 (1990)Google Scholar
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    S.T. Werret, G.D. Peskett, G. Davey, T.W. Bradshaw and J. Delderfield, Development of a small Stirling cycle cooler for spaceflight applications, Adv. Cryog. Eng. 31: 791 (1986)CrossRefGoogle Scholar
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    G. Claudet, L. Duband, A. Ravex and P. Rolland, Development of cryocoolers for space applications using hydrodynamic gas bearings, Proc. 4 th European Symp. on Space Environmental and Control Systems, Florence (Italy) Oct. 1991. ESA SP-324, Dec. 1991 Google Scholar
  5. 5.
    W. D. Stacy, Diaphragm Stirling cryocooler developments, Cryogenics 32: 138 (1992)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • A. Ravex
    • 1
  • L. Duband
    • 1
  • P. Rolland
    • 1
  1. 1.Service des Basses Températures, Département de Recherche Fondamentale sur la Matiére CondenséeCommissariat à I’Energie Atomique (CEA)Grenoble CedexFrance

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