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Record Details

Record 24 of 640
Dual clearance squeeze film damper for high load conditions
Author and Affiliation:
Fleming, D. P.(NASA Lewis Research Center, Cleveland, OH, United States)
Abstract: Squeeze 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.
Publication Date: Apr 01, 1985
Document ID:
19850050809
(Acquired Nov 28, 1995)
Accession Number: 85A32960
Subject Category: MECHANICAL ENGINEERING
Report/Patent Number: ASME PAPER 84-TRIB-7
Document Type: Journal Article
Publication Information: ASME, Transactions, Journal of Tribology; p. 274-278;; (ISSN 0742-4787); 107
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Lewis Research Center; Cleveland, OH, United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CLEARANCES; LOADS (FORCES); SQUEEZE FILMS; TURBOSHAFTS; VIBRATION DAMPING; BEARINGS; DYNAMIC CHARACTERISTICS; GRAPHS (CHARTS); ITERATION; ROTOR SPEED; STIFFNESS
Imprint And Other Notes: (American Society of Mechanical Engineers and American Society of Lubrication Engineers, Joint Lubrication Conference, San Diego, CA, Oct. 22-24, 1984) ASME, Transactions, Journal of Tribology (ISSN 0742-4787), vol. 107, April 1985, p. 274-278; Discussion, p. 278; Author's Closure, p. 278, 279. Previously announced in STAR as N84-25064.
Miscellaneous Notes: 278; Author's Closure, p. 278, 279. Previously announced in STAR as N84-25064
Availability Source: Other Sources
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