The influences of orifice restriction and journal eccentricity on the stability of the rigid rotor-hybrid bearing system

Abstract The influences of restriction parameter and eccentricity on the stability of the rigid rotor supported by single-row, six-recessed hybrid bearings with orifice compensation are studied. The load capacity, stability threshold, and the critical whirl ratio versus the change of restriction parameter are each simulated for both small and large eccentricity ratio cases, also for both the shallow-recessed and the deep-recessed bearings in various land-width ratios. Simulation results will reveal that the significant influence of design parameters. The appropriate selections of restriction parameter and land-width ratio for the design of a hybrid bearing, superior load capacity and stability threshold can be obtainable. The simulated results have been concluded for the design of hybrid bearing and its restrictors.