Analysis of Static Stiffness of Elastic Composite Cylindrical Roller Bearing Based on the Axle Box of Electric Multiple Unit

The stiffness performance of bearing plays a key role in the normal operation of Electric Multiple Unit. Elastic composite cylindrical roller bearing (hereinafter referred to as elastic bearing) is a new type of bearing which can improve stress concentration and comprehensive performance. By means of theoretical analysis, the complex load distribution of emu's axle box is determined, the new bearing and ordinary bearing are analyzed by means of numerical analysis, and the stiffness and maximum equivalent stress of the two bearings are calculated by taking the pre-load and the number of rollers as variables. The results show that the stiffness and maximum equivalent stress of new bearing and ordinary bearing increase with the increase of preload. As the number of rolling bodies increases, the stiffness increases but the maximum equivalent stress decreases. Considering the comprehensive fatigue failure, the elastic bearing has obvious advantages in static stiffness compared with ordinary cylindrical roller bearing.