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Gas-lubricated foil bearings for high speed turboalternator - Construction and performanceFoil bearings were designed and fabricated to replace pivoted-shoe journal bearings in a Brayton cycle turboalternator, within space limitations and constraints imposed by the existing machine. The foil bearings were integrated into a unified assembly with the rotor, housing, seals, and gimbal-mounted thrust bearing, without changes and modifications of machine components other than the journal bearings. The gas-lubricated foil bearings, which require no external pressure-source, furnished a stable support for a 21.9 pound rotor in the vertical attitude at speeds to 43,200 rpm. Excellent wipe-wear characteristics permitted well over 1000 start-stop cycles, without deterioration of performance in the entire speed range. The paper reviews salient aspects of design, fabrication, and performance. An account is given of rotor dynamics during starting, stopping, and traversing the region of resonances. The state of journal and foil surfaces is examined following intensive start-stop cycling and high-speed runs over extended periods of time.
Document ID
19740029582
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Licht, L.
Branger, M.
(Ampex Corp. Redwood City, Calif., United States)
Anderson, W. J.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Machine Elements And Processes
Report/Patent Number
ASME PAPER 73-LUB-5
Meeting Information
Meeting: Joint Lubrication Conference
Location: Atlanta, GA
Country: US
Start Date: October 15, 1973
End Date: October 18, 1973
Sponsors: American Society of Mechanical Engineers, American Society of Lubrication Engineers
Accession Number
74A12332
Distribution Limits
Public
Copyright
Other

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