考虑轴向卸载的风电机组固定端轴承承载特性  

Load Characteristics of Fixed End Bearings for Wind Turbines Considering Axial Unloading

作　　者：李国庆 李学峰 闫云强 梁雪 LI Guoqing;LI Xuefeng;YAN Yunqiang;LIANG Xue(Guodian Power Inner Mongolia New Energy Development Co.,Ltd.,Hohhot 010020,China;Liaoning Zhongke Jing Chuang Intelligent Energy Co.,Ltd.,Shenyang 110027,China)

机构地区：[1]国电电力内蒙古新能源开发有限公司,呼和浩特010020 [2]辽宁中科经创智慧能源有限公司,沈阳110027

出　　处：《轴承》2024年第9期37-45,共9页Bearing

摘　　要：针对内蒙古某风电场1.5 MW风电机组固定端轴承滚动体和滚道剥落及主轴系后窜等故障现象,以健康状态的风电机组为研究对象,基于赫兹接触理论,通过设计参数联合实测修正办法确定轴承的关键参数值,建立了考虑轴向卸载的风电机组主轴系动力学数值模型,分析固定端轴承故障机理及不同轴向卸载工况下固定端轴承的承载特性,探究轴向卸载策略以确保固定端轴承处于合理的承载状态。结果表明:未进行轴向卸载的风电机组存在主轴系后窜故障,对于健康状态的主轴系,当轴向卸载力为140~180 kN时,固定端轴承双列滚动体的接触力分布合理,可有效改善主轴系后窜故障。Aimed at the fault phenomena of rolling element and raceway spalling of fixed end bearings and backward shifting of main shaft system for 1.5 MW wind turbines in a wind farm station in Inner Mongolia,taking healthy wind turbines as research objects,the key parameter values of the bearings are determined based on Hertz contact theory by combining design parameters with actual measurement correction method.A dynamic numerical model of main shaft system for wind turbines considering axial unloading is established,the fault mechanism of the bearings and load characteristics of the bearings under different axial unloading conditions are analyzed,and the axial unloading strategies are explored to ensure that the bearings are in a reasonable loading state.The results show that the main shaft system for wind turbines without axial unloading has backward shifting fault.For healthy main shaft system,when the axial unloading force is 140~180 kN,the contact force distribution of two rows of rolling elements of the bearings is reasonable,improving the backward shifting fault of main shaft system effectively.

关 键 词：滚动轴承 风电轴承 调心滚子轴承 风力发电机组 故障分析 动力学 

分 类 号：TH133.33[机械工程—机械制造及自动化] TK83[动力工程及工程热物理—流体机械及工程]