Effect of Frequency and Load on Minimum Film Thickness in Gas Lubricated Journal Bearings

Mechanical Engineering

Gas lubricated journal bearing are an attractive means of support for rotating members in micro fabricated machines. Their low drags and near zero wear makes them particularly important to high speed machines. The principal of an air or gas bearing is simple, when two surfaces form a wedge, and one surface moves relative to the other surface, pressure is generated between the surfaces because of the hydrodynamic action of the fluid which carries load. In this paper, the analysis of one dimensional dynamic loading of gas lubricated journal bearing has been developed. The effect of load on minimum film thickness with respect to time has been studied in this work. The present analysis has been carried out under the assumption of isothermal condition for the sake of simplicity. The Reynolds’ equation is discretized using finite difference method and a computational algorithm based upon Newton-Raphson technique has been developed. The variation of gas bearing characteristics in terms of minimum film thickness, eccentricity ratio, attitude angle and friction coefficient has been studies with respect to time.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.