In this paper, the mechanical models of large-scale double row slewing ball bearing considering combined loading conditions were presented based on the rigid rings and flexible rings, respectively. And the contact properties between the ball and raceway were studied. These workflows for the calculation were described and programmed by MATLAB. The load distributions of slewing bearing for 2MW wind turbine were presented. The results indicated that the load distribution with the ideal stiff assumption differs from the load distribution determined by taking into account the flexibility of rings. With flexible rings, the magnitude of contact force is less than that of the rigid rings. The influences of the initial contact angle, the coefficient of groove curvature radius, the clearance on maximum contact force were analyzed and some suggestions have been discussed. These parameters have significant effects on the load distribution. The maximum contact force decreases with coefficient of groove curvature radius decrease. A three dimensional finite element model of the slewing bearing is established and analyzed. The simulated results are compared with that of mechanical models.

中文翻译：

---

风力发电机双排回转球轴承的力学模型和接触特性

本文分别基于刚性环和柔性环，提出了考虑组合载荷条件的大型双列回转支承轴承的力学模型。并研究了球与滚道之间的接触特性。这些用于计算的工作流程已由MATLAB进行了描述和编程。给出了2MW风力发电机转盘轴承的载荷分布。结果表明，具有理想刚度假设的载荷分布与通过考虑环的柔韧性确定的载荷分布不同。对于挠性环，接触力的大小小于刚性环。初始接触角，槽曲率半径系数，分析了最大接触力的游隙，并讨论了一些建议。这些参数对负载分配有重要影响。最大接触力随着槽曲率半径系数的减小而减小。建立并分析了回转支承的三维有限元模型。仿真结果与力学模型进行了比较。