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Dual clearance squeeze film damper for high load conditionsSqueeze film dampers are widely used to control vibrations in aircraft turbine engines and other rotating machinery. However, if shaft unbalance rises appreciably above the design value (e.g., due to a turbine blade loss), a conventional squeeze film becomes overloaded, and is no longer effective in controlling vibration amplitudes and bearing forces. A damper concept characterized by two oil films is described. Under normal conditions, only one low-clearance film is active, allowing precise location of the shaft centerline. Under high unbalance conditions, both films are active, controlling shaft vibration in a near-optimum manner, and allowing continued operation until a safe shutdown can be made.
Document ID
19850050809
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fleming, D. P.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: ASME, Transactions, Journal of Tribology
Volume: 107
ISSN: 0742-4787
Subject Category
Mechanical Engineering
Report/Patent Number
ASME PAPER 84-TRIB-7
Accession Number
85A32960
Distribution Limits
Public
Copyright
Other

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