Optimum Design on Hydrostatic Spherical Bearings : Analytical Solutions in Fluid Film Lubrication

The optimum design on hydrostatic spherical bearings in fluid film lubrication is studied theoretically. The analytical solutions for load-carrying capacity, recess pressure, flow rate, frictional torque, power loss and stiffness are derived for both the fitted and clearance type bearings with a capillary or an orifice restrictor. Their power loss and stiffness as a function of the equivalent radius of loads and the size of restrictors are illustrated. The optimum size of their restrictors is obtained. The effects of the seat angles, clearance-ratio and operating conditions on the bearing characteristics and the optimum size based on the minimum power loss are clarified