Different dynamic characteristics of cylindrical roller bearing between single-bearing system and tester system

The design process for bearings typically involves design, simulation and testing. However, the influence of paired bearings and actual support is not considered during the design process, which results in an incomplete match between design parameter considerations and tester parameters. This, in turn, reduces the efficiency of the design process. In addressing these issues, this paper focuses on cylindrical roller bearings as the research object, conducting dynamics investigation and comparison under single bearing and tester systems. Utilising the theory of finite element analysis, finite element dynamics models of cylindrical roller bearings under single bearing and tester systems are established, respectively. The dynamic characteristic parameters of stress, contact force, roller deflection angle and vibration acceleration are extracted to obtain the vibration characteristics of the bearings. The differences in the dynamic characteristics of cylindrical roller bearings under the same load and rotational speed in the two working conditions are then compared. The results demonstrate that with an increase in load and rotational speed, there is an increase in stress, contact force, vibration acceleration and maximum deflection angle of cylindrical roller bearing. Besides, it is evident that the dynamic parameters in the tester system are larger than those in the single-bearing system. However, the average deflection angle shows a decreasing trend with the increase of rotational speed and an increasing trend with the increase of load.