Modeling of local surface defect in rolling bearing and quantitative calculation of impact force

The impact force generated when a roller passing through a local defect at the raceway was calculated by combing the impact theory of rigid body dynamics and kinetic properties of rolling bearings. First, the contact force acting on every balls was calculated when the bearings is acted by a radial force. Second, the force moment acting on the roller, and the velocity and acceleration of the roller was analyzed based on the kinetic characteristics of the bearing when the roller rolling into the defect region. Then, the impact force was obtained by the momentum principle of impact theory. Finally, an example was given, and the results show that the impact force is proportional to the contact force, bearing rotation speed and the defect diameters. This result also shows the validity of the model proposed in this paper.