The dynamic performance of deep groove ball bearings is greatly influenced by the variable operating conditions

mostly the fluctuation of speed of the new energy motor.Taking the 6207 type deep groove ball bearing as the research object

considering the flexible deformation of the cage

the explicit dynamics analysis model of deep groove ball bearings was established in the Ansys/Ls-Dyna software.The influence of different angular acceleration conditions and different rotation fluctuations on the stability and contact characteristics of the cage was analyzed.The results show that the increase of angular acceleration can lead to the increase of velocity fluctuation and the decrease of cage stability.Compared with the stable condition

the contact force and instability between the steel ball and the cage are obviously increased under the rotation fluctuation condi-tion.The influence of speed fluctuation condition on the stability of the cage in descending order is rectangular fluctuation

triangular fluctuation

sinusoidal fluctuation and steady working condition.