Foresight in static stiffness of hydrostatic bearings with various compensations by film gradient versus recess pressure

Abstract

Purpose

The purpose of this paper is to investigate the static stiffness of hydrostatic bearings with three constant compensations in types of constant‐flow pump, capillary and orifice, and both single‐action and double‐action variable restrictors with cylindrical‐spool, tapered‐spool, and membrane types by film gradient and recess pressure.

Design/methodology/approach

This paper utilizes the equations of flow equilibrium to determine the variations of film thickness or displacement of loading table with respect to the varying of recess pressure. For a hydrostatic bearing whose recess pressures are controlled by compensations, the stiffness characteristics can be presented directly by these variations.

Findings

The usage range of recess pressure and compensation parameters should be selected to correspond to a variation with smallest gradient.

Originality/value

This paper proposes an extensive database as a critical requirement for the selection of types and parameters of the compensation as to yield the acceptable or optimized characteristics in design of hydrostatic bearings.

Citation

Kang, Y., Chen, C., Lee, J., Chen, J. and Chang, Y. (2010), "Foresight in static stiffness of hydrostatic bearings with various compensations by film gradient versus recess pressure", Industrial Lubrication and Tribology, Vol. 62 No. 5, pp. 304-319. https://doi.org/10.1108/00368791011064473