沟曲率半径系数对风电轴承承载能力的影响

Effects of groove curvature radius coefficients on wind turbine bearing′s carrying capacity

采用有限元分析方法,建立了风电偏航轴承的三维有限元仿真模型;应用典型的联合载荷和边界条件,对各种不同沟曲率半径系数的轴承模型进行静力学接触分析,得出了轴承承载过程中的接触应力、应变的相互关系.结果表明,内圈沟曲率半径系数为0.52,外圈沟曲率半径系数为0.53时的轴承承载能力最高;同时发现,轴承加载后的原始接触角增大,内圈和外圈在圆周方向上的最大等效应力与公称接触点不重合,而且载荷不同,接触点位置也不相同.研究结果为风电轴承设计提供了参考依据.

A 3D model for wind power generator yaw bearings was established using finite element analysis （FEA） method.The static mechanical contacting analysis was conducted based on united loads and boundary conditions.Then,the contacting stress and strain were acquired for wind power generator bearings in the different volume of groove curvature radius coefficient.Eventually,the bearing＇s carrying capacity is best,when its groove curvature radius coefficient of inner ring and outer ring are 0.52 and 0.53 respectively.The results show that bearing＇s nominal contact angle increases after loaded,the equivalently maximal stress on the bearings inner ring and outer ring does not appear in nominal contact point along the circumferential direction,and loads of different,contact point position is not the same.The research can provide guidance for design of wind power generator bearings.