表面硬化滚道风电主轴轴承的疲劳寿命分析  

ANALYSIS FOR FATIGUE LIFE OF WIND TURBINE MAIN BEARING WITH SURFACE HARDENED RACEWAYS

作　　者：李云峰[1,2] 高元安 贾磊[1] Li Yunfeng;Gao Yuan’an;Jia Lei(School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,China;Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province,Luoyang 471003,China;Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471039,China)

机构地区：[1]河南科技大学机电工程学院,洛阳471003 [2]机械装备先进制造河南省协同创新中心,洛阳471003 [3]洛阳轴承研究所有限公司,洛阳471039

出　　处：《太阳能学报》2022年第6期176-182,共7页Acta Energiae Solaris Sinica

基　　金：国家重点研发计划(2018YFB0407304);国机集团重大科技专项(SINOMAST-ZDZX-2019-02)。

摘　　要：建立一种针对表面硬化滚道三排圆柱滚子风电主轴轴承的疲劳寿命分析方法。首先,在卡迪尔坐标系中建立三排圆柱滚子风电主轴轴承的5自由度力学模型,分析计算在外部5个方向载荷联合作用下轴承的内部滚子载荷分布;然后,建立圆柱滚子与表面硬化滚道之间的弹塑性接触有限元模型,计算得到滚子接触载荷作用下滚道次表面的脉动应力分布;最后,根据Goodman方程将滚道脉动应力幅值转化为交变应力幅值,运用Basquin应力-寿命理论计算得到风电主轴轴承的疲劳寿命。结果表明,轴承的下风向外圈滚道承受来自风轮的推力载荷,其疲劳寿命最短;径向外圈滚道承受风轮的重力载荷,其疲劳寿命最长。轴承的疲劳寿命取决于下风向滚道。A fatigue life analysis method for wind turbine main bearing with the type of three-row cylindrical roller and surface hardened raceways was established.Firstly,a 5-DOF mechanical model of three-row of cylindrical roller wind turbine main bearing was established in the Cartier coordinate system,and the internal roller load distribution of the bearing under the combined action of external loads in five directions was analyzed and calculated.Then,the elastoplastic contact finite element model between the cylindrical roller and the surface hardened raceway was established,and the pulsating stress distribution under the raceway surface caused by the roller contact load was calculated.Finally,the pulsation stress amplitude was converted into alternating stress amplitude by using Goodman equation,and Basquin stress-life theory was used to calculate the fatigue life of wind turbine main bearing.The results show that the downwind outer ring raceway of the bearing bears the thrust load from the wind rotor and has the shortest fatigue life,while the radial outer ring raceway bears the gravity load of the wind rotor and has the longest fatigue life.The fatigue life of the bearing depends on the downwind raceway.

关 键 词：风电机组 滚子轴承 载荷分布 表面硬化 疲劳寿命 

分 类 号：TH122[机械工程—机械设计及理论]