Influence of Wear on the Cross-Coupled Dynamic Coefficients and Threshold Speed of Conical Hybrid Fluid Film Bearing

Hybrid journal bearings are used mostly to take benefits of simultaneous hydrostatic and hydrodynamic actions. This paper uses numerical technique to investigate wear effect on the cross-coupled dynamic coeff. and threshold stability speed of recessless conical hybrid journal bearing (CHJB) using capillary restrictor. The developed Reynolds equation describing the streamline incompressible flow, iso-viscous lubricating fluid in the narrow region of conical bearing and journal is resolved by methodology of finite element. Results obtained by numerical simulation reveal the considerable change in the dynamic coeff. and threshold stability speed of worn CHJB as compared to newly installed bearing of matching configuration.