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RESEARCH PAPERS

Spherical and Conical Spiral Groove Bearings—Part II: Load Capacity and Stability

[+] Author and Article Information
J. Bootsma

Philips Research Labs, Eindhoven, The Netherlands

J. of Lubrication Tech 97(2), 243-249 (Apr 01, 1975) (7 pages) doi:10.1115/1.3452564 History: Received June 26, 1974; Online October 18, 2010

Abstract

The theory developed in Part I is applied to the solving of problems encountered in practice. The manner in which the axial and radial load capacity and stiffness depend on bearing dimensions, particularly on groove dimensions, is shown. The important aspect that spherical and conical spiral groove bearings, just as spiral groove journal bearings, can be stable even if not subjected to a radial load is investigated. A necessary condition for the stability of these bearings in the radially unloaded state is shown to be the complete filling of the bearing gap with a lubricant. In the case of an incompletely filled bearing gap the interaction between the gas-to-liquid interface and the pressure distribution in the lubricating film is such that these bearings have a negative stiffness.

Copyright © 1975 by ASME
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