摘要
【目的】工程应用中,变桨轴承包含数百对滚动体和滚道的非线性接触,受力状况复杂,完整实体模型分析困难。为了更精确地描述变桨轴承运动、受力特点及滚动体载荷应力分布规律,对滚动体和滚道之间的等效方式进行了研究。【方法】以5 MW级风力发电机组三排圆柱滚子轴承为研究对象,首先,建立考虑螺栓连接的叶根-轴承-轮毂整体物理计算模型,采用赫兹接触理论计算非线性弹簧单元刚度进而模拟滚动体变形情况,建立滚动体-滚道之间的接触力学关系;其次,将螺栓等效、接合面摩擦接触纳入实际计算,对轴承结构性能进行分析研究;最后,采用所建立的物理计算模型对变桨轴承进行了承载能力分析。【结果】结果表明,通过轴承最大接触载荷值与NREL的经验公式理论值的对比,发现误差小于5%。该方法具有一定的工程实用价值,可为风力发电机组变桨轴承的合理设计和制造提供参考和依据。
[Objective]In engineering applications,pitch bearings contain hundreds of pairs of nonlinear contact between rolling elements and raceways,the force condition is complicated,and the complete solid model analysis is difficult.In order to accurately describe the motion,force characteristics of pitch bearings and the stress distribution law of the rolling body,the equivalent mode between the rolling body and the raceway was studied.[Methods]Three-row cylindrical roller bearings of 5 MW wind turbines were taken as the research object.Firstly,the integral physical calculation model of root-bearing-hub considering the bolt connection was established,the stiffness of nonlinear spring combination element was calculated by the Hertzian contact theory to simulate the deformation of rolling body,and the contact mechanical relation between the rolling body and the raceway was established.Secondly,the equivalent bolt and the friction contact of the joint surface were included in the actual calculation,and the structural performance of the bearing was analyzed and studied.Finally,the physical calculation model was used to analyze the bearing capacity of the pitch bearing.[Results]The results show that the error is less than 5%by comparing the value of the maximum contact load of the bearing with the theoretical value calculated by the empirical formula of the National Renewable Energy Laboratory(NREL).The method has some practical engineering value and provides reference and basis for the rational design and manufacture of the pitch bearing of wind turbines.
作者
申会鹏
李行雨
张天宇
邱俊
范家爽
SHEN Huipeng;LI Hangyu;ZHANG Tianyu;QIU Jun;FAN Jiashuang(School of Electromechanical Engineering,Henan University of Technology,Zhengzhou 450001,China;Henan Key Laboratory of Super Hard Abrasives and Grinding Equipment,Zhengzhou 450001,China;School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China;Bell Data Technology(Dalian)Co.,Ltd.,Dalian 116033,China)
出处
《机械传动》
北大核心
2025年第5期18-23,31,共7页
Journal of Mechanical Transmission
基金
辽宁省揭榜挂帅科技攻关专项计划项目(2021JH1/10400099课题4)
河南省高等学校青年骨干教师培养计划(202360HAUTShenhuipeng)
河南工业大学青年骨干教师培育计划(2022-0503/21420191)。
