A New Hydrodynamic Gas Bearing Concept

[+] Author and Article Information
M. W. Eusepi

Experimental Programs Research and Development Division, Mechanical Technology Incorporated, Latham, NY 12110

D. F. Wilcock

Consultant to MTI, Tribolock, Inc., Schenectady, NY 12309

J. Tribol 110(4), 614-620 (Oct 01, 1988) (7 pages) doi:10.1115/1.3261702 History: Received March 17, 1987; Online October 29, 2009


Difficulty in attaining and controlling a desirable level of damping in foil bearings, and in designing them for large shaft diameters, led to the concept of the Hydroflex™ bearing. In this concept, each of a number of rigid shoes is supported on a compound post and beam flexure, and the radial motion of the pad is damped by a Coulomb friction damper. In this fashion, the tolerance of the foil to shaft growth (centrifugal and thermal) and to misalignment is retained with the added advantages of a larger and controlled level of damping plus the ready availability of conventional gas bearing theory for design. The feasibility of the Hydroflex™ design approach was demonstrated on a simple test rotor with a 3.5-in. (89-mm) Hydroflex™ bearing at speeds up to 30,000 r/min.

Copyright © 1988 by ASME
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