Abstract: For the three failure modes of slewing bearings (i.e. raceway plastic deformation, raceway fatigue spalling and ring fracture) appeared in engineering applications nowadays, a method for checking the three-row roller slewing bearings under combined loads was established systemically by using the numerical analysis model and the finite element analysis model of the slewing bearings. Numerical analysis model solved the statically indeterminate solving problems of rolling element load distributions with the help of the deformation coordination conditions and the force balance conditions. The rollers was simplified as spring unit based on finite element analysis model, while the rings still adopted entity unit, which avoided a great quantity nonlinear numerical solving calculation of the contacts between the entity rollers and the entity raceways. Safety factors of resisting to plastic deformation of the raceway, fatigue life of the raceway and structural strength safety factors of the rings were calculated by using the established checking method, which provides the basis to determine the degrees of the bearing satisfying the requirements of the working conditions of given applications.

Key words: bearing design, three-row roller, slewing bearing, contact plasticity, fatigue spalling, structural strength

摘要： 针对现有转盘轴承在工程应用中所出现的滚道塑性变形、滚道疲劳剥落和套圈结构断裂这三种失效形式，利用转盘轴承的数值分析模型和有限元分析模型建立了联合载荷作用下三排滚子转盘轴承的校核计算方法。数值分析模型借助于变形协调条件和受力平衡条件解决了滚动体负荷分布的静不定求解问题；有限元分析模型将滚子简化为弹簧单元，而套圈仍然采用实体单元，避免了实体滚子与滚道接触的大量非线性数值求解计算。利用所建立的校核方法计算得出了滚道的抗塑性变形安全系数、滚道的疲劳寿命和套圈的结构强度安全系数，为判定该轴承满足给定应用工况要求的程度提供了依据。

关键词: 轴承设计, 三排滚子, 转盘轴承, 接触塑性, 疲劳剥落, 结构强度