Dynamic Model and Analysis on Slipping of Rolling Ball Bearing Under Variable Speed

Slipping of rolling ball bearings is due to the velocity difference between the rolling ball and the bearing raceways. It is particularly evident during the acceleration phase of rolling ball bearings starting. In this paper, considering the frictional force between the rolling ball and the raceways, the gravity, centrifugal force, and the resistance of the lubricant of the rolling ball, a five-degree-of-freedom slipping dynamic model is established. The nonlinear equations are applied to describe the transient motion of the rolling ball and are solved by the four-order Runge-Kutta method. By varying the radial clearance, radial load, and angular acceleration of the inner ring, the influence of the above factors on the slipping velocity and frictional force of the rolling ball is investigated. The model is used for the study of rolling ball bearing slipping under accelerating conditions and provides a theoretical basis for reducing bearing slipping.