Spiral Grooved Bearing Utilizing the Pumping Effect of a Herringbone Journal Bearing : Method of Numerical Calculation and Intluences of Bearing Parameters

Abstract

A new type of grooved bearing whose axial load-carrying capacity is improved is proposed in this paper. The present type of bearing is composed of herringbone journal bearings, a spiral grooved thrust bearing and a path hole which connects the middle of each bearing. A lubricating gas flows through a path hole by the pumping effect of herringbone grooves. A generalized method of numerical calculation using the narrow groove theory is introduced in this paper for the analysis of the present type of grooved bearings. As a result of the numerical calculation, axial floating characteristics of the present types of grooved bearings are shown to be superior to those of conventional bearings.