中文摘要：

回转支承的承载能力计算无法沿用普通轴承的理论，传统计算方法忽略众多因素影响，结果误差较大，近些年科研人员采用的计算模型复杂，计算时间长。本文提出采用非线性弹簧建立了变桨回转支承的有限元模型，并与经验公式进行对比，验证了模型的正确性。在此基础上，详细分析安装法兰厚度、法兰筒壁厚、法兰筒结构形式及法兰端面的平面度对载荷分布的影响。结果表明安装法兰厚度以回转支承厚度 50%为宜，法兰筒壁厚度对载荷分布影响较小，但筒壁应尽量设计在靠近滚珠一侧，法兰平面度误差对回转支承滚道与滚珠接触压力影响较大，严重影响回转支承的承载能力和使用寿命，在加工和安装过程中要严格控制。

英文摘要：

Capacity calculation of slewing bearing is different from the normal bearing design theory. The traditional method ignored many factors, resulting in a large error ：in the results. A few models developed in recent years are very complex and require a long time to complete the calculations. This paper illustrates a new method, in which a nonlinear spring is used to establish a finite element model of the pitch slewing bearing. The calculation precision of this model is compared with the empirical formula; the results verify the correctness of the model. Then, a detailed analysis of the influence of the flange thickness, wall thickness, flange tube structure type and flange surface flat- ness on the load distribution was completed based on the simplified model. The results showed that the flange thick- ness to slewing bearing thickness should be 50%, the flange tube wall thickness has a small amount of influence on the load distribution, but the wall should be arranged in close proximity to the ball as much as possible. Further- more, the flange flatness error seriously influences the contact pressure between the raceway and the ball, which se- riously affects the slewing bearing capacity and service life, so it should be strictly controlled during processing and installation.