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Magnetic bearings for cryogenic turbomachinesMagnetic bearings offer a number of advantages over gas bearings for the support of rotors in cryogenic turboexpanders and compressors. Their performance is relatively independent of the temperature or pressure of the process gas for a large range of conditions. Active magnetic bearing systems that use capacitive sensors have been developed for high speed compressors for use in cryogenic refrigerators. Here, the development of a magnetic bearing system for a miniature ultra high speed compressor is discussed. The magnetic bearing has demonstrated stability at rotational speeds exceeding 250,000 rpm. This paper describes the important features of the magnetic bearing and presents test results demonstrating its performance characteristics.
Document ID
19930064604
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Iannello, Victor
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sixsmith, Herbert
(Creare, Inc. Hanover, NH, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1991
Publication Information
Publication: In: Advances in cryogenic engineering. Vol. 37B - Proceedings of the 1991 Cryogenic Engineering Conference, Univ. of Alabama, Huntsville, June 11-14, 1991 (A93-48578 20-37)
Publisher: Plenum Press
Subject Category
Mechanical Engineering
Accession Number
93A48601
Funding Number(s)
CONTRACT_GRANT: DE-AC01-87ER-80477
CONTRACT_GRANT: NAS5-30854
Distribution Limits
Public
Copyright
Other

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