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Optimization of self-acting step thrust bearings for load capacity and stiffness.Linearized analysis of a finite-width rectangular step thrust bearing. Dimensionless load capacity and stiffness are expressed in terms of a Fourier cosine series. The dimensionless load capacity and stiffness were found to be a function of the dimensionless bearing number, the pad length-to-width ratio, the film thickness ratio, the step location parameter, and the feed groove parameter. The equations obtained in the analysis were verified. The assumptions imposed were substantiated by comparing the results with an existing exact solution for the infinite width bearing. A digital computer program was developed which determines optimal bearing configuration for maximum load capacity or stiffness. Simple design curves are presented. Results are shown for both compressible and incompressible lubrication. Through a parameter transformation the results are directly usable in designing optimal step sector thrust bearings.
Document ID
19720054229
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hamrock, B. J.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 6, 2013
Publication Date
July 1, 1972
Subject Category
Machine Elements And Processes
Accession Number
72A37895
Distribution Limits
Public
Copyright
Other

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