高速滚动球轴承动态载荷计算改进方法的研究

在离心力和陀螺力矩的作用下,滚动球轴承高速旋转时的内部载荷分布与轴承静止情况下的载荷分布具有显著差异,其主要影响因素包括,滚动轴承的接触角、轴承预紧位移以及旋转速度等。基于JonesHarris(简称JH)力学模型的轴承载荷分布的分析方法已经得到了广泛的应用。然而其计算公式多、迭代繁琐、收敛速度慢。针对此现象,研究了轴承动态载荷分布规律及其算法,提出了改进的JH轴承数值计算模型,给出相应的简化计算步骤。计算与对比结果表明,改进的JH计算模型在其应用范围内,可以大幅减少计算时间。

A simplified approach for calculation of rolling ball bearing internal dynamic load distribution

As running at high speed, the rolling elements in the rolling bearing will be influenced by centrifugal force and gyroscopic effect which will cause some significant differences from the time when the bearing is static. The main factors cause those differences include bearing contact angles, axial preload and bearing rotation speed etc. The way of calculating the distribution of bearing internal loads based on Jones & Harris’s model has been widely adapted. However, it involves too many equations, complicated iterations and slow convergence speed. In this paper, regularities and the algorithm of the bearing internal load distribution were analyzed to simplify the J&H bearing model providing a new simplified calculation procedure. The conclusion of comparison shows, under some certain occasions, a considerable reduction of time of numerical calculation using this method.