滚动轴承的刚度分析方法与试验测定

本文基于Hertz接触理论建立轴承零件模型,在分析轴承零件受力的基础上,给出了轴承内部零件相互作用的具体表达式,分析了轴承载荷(轴向、径向、力矩载荷)对轴承接触应力和接触变形的影响,获得了滚动轴承整体五自由度刚度矩阵的表达形式.在滚动轴承加载试验台上,通过测量不同载荷作用下轴承的轴向位移与径向位移,获得了轴承的刚度特性,与轴承刚度理论计算结果对比,验证模型正确性.

Analytical determination method of the rolling bearing stiffness and experimental validation

This paper developed an analytical model of rolling bearing based on Hertz contact theory. Based on this model, the expressions of interaction forces of bearing parts were given, and the influences of axial, radial and moment bearing loads on bearing contact stress and contact deformation were also analyzed. Then, five degrees of freedom stiffness matrix of the rolling bearing was obtained. Finally, the experimental rig of the rolling bearing was built, and both the axial and radial deformations were measured under different loading levels, and then the stiffness of the bearing was achieved. Comparison between the theoretical and experimental results shows good agreement, which validates the proposed analytical model.