Study on power losses of angular contact ball bearings with and without thermal expansions of bearing components

摘要

In this work, thermal expansions and thermal displacements of bearing components are firstly integrated into the dynamic model of ball bearings; on this basis, the contact loads, contact angles, sliding and spinning velocities of bearings are calculated to evaluate the heat generation for the heat sources of multi-node thermal network model. Then, thermal expansions and thermal displacements of bearing components are estimated through the multi-node thermal network model to adjust the dynamic model real time. Subsequently, the effects of dynamic behaviors of bearings with thermal expansions on the power loss are revealed under various rotational speeds and loads. Research results provide a theoretical basis for engineering application of angular contact ball bearings.