Pressure-Induced Torque in Unloaded Hybrid Bearings

Abstract

A pressure-induced torque is emphasized in externally pressurized bearings having deep pockets, due to the pressure buildup by shaft rotation on the downstream vertical side of the recess. A standard simplified analysis is presented for both laminar and turbulent operation, with improved values for parameters k_x and k_x, which intervene in the pressure differential equation, as well as for the Couette turbulent shear stress; the mentioned values are valid for large Reynolds numbers. Comparison with experimental data for a water-lubricated test bearing exhibits the importance of the pressure-induced effect on the torque acting on the stationary member of the bearing.

Keywords

pressure-induced torque unloaded hybrid bearings pressure differential equation Couette turbulent shear stress Reynolds number laminar and turbulent operation

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Pressure-Induced Torque in Unloaded Hybrid Bearings—A Case Study

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