The restrictive effects of orifice compensation on the stability of the Jeffcott rotor‐hybrid bearing system

Abstract

This study examines the influence of the restriction parameters on the stability of a Jeffcott rotor supported by single‐row, six‐recessed hybrid bearings with orifice compensation. The Reynolds equation governing oil‐films is solved using the finite difference method, whilst the determination of stability of the Jeffcott rotor‐bearing system uses the Routh‐Hurwitz method. The load capacity, stability threshold, and the critical whirl ratio versus the changing restriction parameters, are each simulated for the shallow‐recessed bearing and the deep‐recessed bearing with various land‐width ratios. The simulation results indicate that with the appropriate design of restriction parameters and land‐width ratio, a deep‐recessed bearing may be relatively superior. Although the performance of a shallow‐recessed bearing is, by and large, superior to that of a deep‐recessed bearing, it does nevertheless hinge upon the design of both restrictor and bearing.

Citation

Chen, C., Chu, C., Kang, Y., Huang, Y. and Teng, J. (2002), "The restrictive effects of orifice compensation on the stability of the Jeffcott rotor‐hybrid bearing system", Industrial Lubrication and Tribology, Vol. 54 No. 6, pp. 255-261. https://doi.org/10.1108/00368790210445614