Influence of restrictor on stability of the rigid rotor–hybrid bearing system

This paper investigates the restriction effects of capillary and orifice on the stability of the rigid rotor–hybrid bearing system. The finite difference method and numerical integration are used to solve the Reynolds lubrication equations and static and dynamic performances of lubrication film, respectively, and the Routh–Hurwitz method is used to determine the stability threshold. The results reveal that the influence of stability threshold versus carrying load according to hybrid bearings with or without restrictors, as well as, shallow or deep recesses and various land-width ratios.