Influence of Inner Ring Roundness Deviation on the Dynamic Characteristics of Cylindrical Roller Bearing

Abstract

The difference between the maximum and minimum deviation of the actual contour relative to the ideal circle is roundness deviation caused by uneven temperature and wear of the ring during production and operation, which will lead to abnormal force. In this paper, a rigid flexible coupling dynamic model of cylindrical roller bearing considering the roundness deviation of inner ring is established to study the dynamic characteristics of bearing. And the dynamic characteristics of stress and contact force of raceway or cage under different roundness parameters are studied. It is concluded that the stress, contact force and trajectory of the inner ring are largely influenced by its roundness deviation. The stress and contact force will rise with the increasing of the deviation. Meanwhile, the displacement amplitude increases and the trajectory of the inner ring gradually tends to be irregular shape. The force on the cage will be increased due to the existence of roundness deviation, but the degree of deviation has little effect on the dynamics of the cage.