Ball bearing and tapered roller bearing torque: analytical, numerical and experimental results

摘要

The miscellaneous components of bearing torque are described analytically. When the rolling element - race contact lengths are similar, the hydrodynamic ball bearing torque component can be similar to the tapered roller bearing one. In ball bearings, the sliding speed distribution encountered at the ball/race contact is the result of two torque contributions: curvature in space of the contact ellipse and spinning effects. These two torque contributions don't exist in tapered roller bearings. However tapered roller bearings are subjected to a roller/rib torque which is compared analytically to the two previous ball bearing torque components. The final tapered roller bearing torque is compared to ball bearing torque under various operating conditions. it is shown that there are conditions for which the tapered roller bearing torque can be smaller than the ball bearing one; the latter point is demonstrated numerically and experimentally in reported literature.