螺栓预紧力对风力发电机组变桨轴承强度影响的研究  

Influence of Bolt Preload on Variable Pitch Bearing Strength of Wind Turbine

作　　者：孟高强 李瑞君 刘登 燕友增 MENG Gaoqiang;LI Ruijun;LIU Deng;YAN Youzeng(Wind Energy Institute,Mingyang Smart Energy Group Limited,Zhongshan 528400,China)

机构地区：[1]明阳智慧能源集团股份公司风能研究院,广东中山528400

出　　处：《机械》2024年第10期29-36,共8页Machinery

摘　　要：变桨轴承是风力发电机组的核心传动部件,为研究螺栓预紧力对其强度的影响,以某型风力发电机组三排滚柱回转支承为研究对象,通过有限元方法建立“轮毂-轴承-叶片”模型,利用梁单元模拟螺栓并施加预紧力,非线性弹簧单元模拟实体滚子,进行变桨轴承静力学仿真计算。对比不同螺栓预紧力下极限工况对三排滚柱回转支承套圈应力、位移、滚动体接触载荷分布规律的影响及螺栓自身强度。结果表明,减小螺栓预紧力时,轴承套圈油槽位置应力减小,滚动体接触载荷减小,套圈位移增大。考虑到轮毂侧的滚动体承载略大于叶片侧,实际装配过程中可适当增大内圈螺栓预紧力。Variable pitch bearing is the core transmission component of wind turbine.In order to study the influence of bolt preload on its strength,a three-row roller slewing support of a wind turbine was taken as the research object,and a"hub-bearing-blade"model was established by finite element method.The beam element was used to simulate the bolt,the preload force was applied,and the nonlinear spring element was used to simulate the solid roller.The static simulation of variable pitch bearing is carried out.The distribution law of stress and displacement,contact load of rolling element and bolt strength of three-row roller slewing bearing ring under different bolt preloading conditions were compared.The results show that the stress in the oil groove of bearing ring decreases,the contact load of rolling body decreases,and the displacement of ring increases.Considering that the bearing capacity of the roller on the hub side is slightly larger than that on the blade side,the pre-tightening force of the inner ring bolt can be appropriately increased during the actual assembly process.

关 键 词：滚动轴承 变桨轴承 三排滚柱回转支承 风力发电机组 螺栓预紧力 

分 类 号：TH123[机械工程—机械设计及理论] TM315[电气工程—电机]