Analysis of cage dynamic characteristics for high-speed full ceramic ball bearing under non-lubrication condition.

With the increasingly harsh service conditions, higher requirements are put forward for the cage of ceramic bearings. In this study, dynamic model of full ceramic ball bearing, in which the motion characteristics of cage is considered, under condition of non-lubrication is established, and the model accuracy is also verified by experiments. The change of contact angles, influence of ball-pocket clearance and guide clearance on the dynamic characteristics of cage are studied. Dynamic characteristics of the cage under different axial loads and rotation speeds are studied. The results show that the influence of rotation speed, radial load and axial load on contact angles are basically the same, while the increase in axial load helps to reduce the difference between internal and external contact angles. With the increase in ball-pocket clearance and guide clearance, the slip ratio of cage decreases first and then increases, so there is an optimal ball-pocket clearance and guide clearance, which makes the cage stable. Compared with the rotational speed, the axial load has a greater impact on the dynamic characteristics of the cage. The results have certain reference value for the optimal design and manufacture of full ceramic bearing cage under non-lubrication conditions. [ABSTRACT FROM AUTHOR]