双金属复合内圈滚动轴承接触特性分析

Analysis of contact characteristics of double-layer metal composite inner ring rolling bearings

为解决圆柱滚子轴承在大载荷条件下易磨损的问题,设计了一种双层金属复合材料内圈圆柱滚子轴承.以复合内圈与滚子的接触为例,基于赫兹接触理论和波西涅斯克理论,给出了单个滚子与轴承内圈的最大接触应力.结合层复合材料力学模型,计算双层金属复合材料内圈等效弹性模量.建立内圈与单个滚子间接触模型,采用有限元仿真方法,探究不同材料厚度下的接触应力和弹性变形.通过接触摩擦试验,验证复合材料内圈在不同材料厚度下的接触宽度.结果表明:双层金属复合材料内圈轴承滚子与内圈接触变形增大,接触应力减小,可以有助于减少圆柱滚子轴承的磨损.

To solve the problem that cylindrical roller bearings were easily worn under heavy load conditions,a double-layer metal composite inner ring cylindrical roller bearing was designed.Taking the contact between the composite inner ring and the roller as example,the maximum contact stress of a single roller and the bearing inner ring was obtained based on Hertz contact theory and Boussinesq theory.The mechanical model of combined layer composite material was used to calculate the double-layer metal composite equivalent elastic modulus of inner ring.The contact model between inner ring and single roller was established,and the finite element simulation method was used to explore contact stress and elastic deformation for different material thickness.Through contact friction test,the contact widths were verified with different material thicknesses of composite inner ring.The results show that the contact deformation of double-layer metal composite between inner ring bearing roller and inner ring is increased with reduced contact stress,which is helpful to reduce the wear of cylindrical roller bearing.