An optimization design method of a cylindrical roller bearing with the low friction torque

Abstract The heat generated during the bearing working process would greatly affect the working life and stability of bearing and mechanical transmission system. To analyze the heat generation of cylindrical roller bearings (CRBs), a theoretical calculation model of friction torque is proposed. The differences of friction torque between the flexible and rigid CRBs are compared. The waviness in the rings and rollers are considered. To study the bearing transient temperature characteristics, a thermal network is established; and the transient heat balance equations are solved. A research on the optimization algorithm for manufacturing parameters in the CRB with the low friction torque is conducted, in which the waviness errors are considered. The results show that the radial force, speed, and waviness can greatly affect the friction torque and temperature characteristics of CRB. The friction torque and outer ring temperature increase with the increment of radial force, speed, and waviness amplitude and order. The friction torque and temperature of CRB can be effectively reduced by changing the bearing manufacturing parameters. This study can provide some guidance to the optimal design the CRB with the low friction torque.