An improved planar dynamic model for vibration analysis of a cylindrical roller bearing

Vibration analysis of cylindrical roller bearings (CRBs) can be useful for controlling the vibration characteristics of the machinery. To overcome this problem, an improved planar dynamic model is presented for calculating the vibrations of a CRB. All components (such as inner raceway, rollers, cage, and outer raceway) of the CRB system and their interactions are considered in the proposed model, as well as the elastic supports of the shaft and housing. An experiment study is presented to verify the proposed model. The effects of the radial load, shaft speed and bearing clearance on the vibrations of the CRB system are evaluated. The results show that the radial load, shaft speed and bearing clearance have great effects on the vibrations of the bearing components. The vibration accelerations of the raceways, rollers, and cage increase with the increments of the shaft speed and the radial load. In addition, the increment of the pocket clearance results in the increase of the roller-cage contact force. The proposed model can provide a method for the dynamic formulations of the CRBs with the rollers and cage. Moreover, this work can be used for the vibration monitoring of CRBS in the rotating machinery.