A Study on Characteristics of Externally Pressurized Gas Thrust Bearing with Surface-restriction Compensation

概要

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The "surface-restriction" compensation in an externally pressurized gas bearing is a type of hydrostatic step compensation, and is composed of many narrow grooves on the bearing surface instead of shallow recess to form a restricting step. In this paper, two kinds of flow models are introduced to analyze the hydrostatic performances of externally pressurized gas thrust bearing with this compensation yielding the theoretical pressure distribution, load capacity and bearing stiffness. The experimental results agreed well with theoretical ones for pressure distribution and load capacity, while they showed a little larger values than theory for bearing stiffness. A design criterion is also given for this type of the thrust bearing.
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