基于弹流润滑效应的风机主轴轴承优化设计  

Optimization Design of Wind Turbine Mainshaft Bearing Based on Elastohydrodynamic Lubrication

作　　者：王高升[1,2,3] 曹亮 李建华[1] WANG Gao-slaeng;CAO Liang;LI Jian-hua(College of Mechanical Engineering,Hunan,Institute of Engineering,Xiangtan 411104,China;Health Maintenance for Mechanical Equipment Key Lab of Hunan Province,Hunan University of Seience and Technology,Xiangtan 411201,China;Hunan Province Cooperative Innovation Center for Wind Power Equipment and Energy Conversion,Hurian Institute of Engineering,Xiangtan 411104,China)

机构地区：[1]湖南工程学院机械工程学院,湘潭411104 [2]湖南科技大学机械设备健康维护省重点实验室,湘潭411201 [3]湖南工程学院湖南省风电装备与电能变换协同创新中心,湘潭411104

出　　处：《湖南工程学院学报（自然科学版）》2018年第4期57-61,共5页Journal of Hunan Institute of Engineering(Natural Science Edition)

基　　金：湖南省机械设备健康维护重点实验室开放基金资助项目(E21614)

摘　　要：风机主轴轴承是风电机组的核心零件,其润滑性能关系到风机的正常运行.本文考虑了主轴轴承弹性流体动力润滑状态下最小油膜厚度对轴承可靠性的影响,建立了双列调心滚子主轴轴承的优化设计模型,以主轴轴承额定动载荷为优化目标,每列滚子数、滚子直径、滚子有效长度和壁厚设为设计变量,基于MATLAB对优化设计模型采用全局搜索方法进行优化分析.优化后的1.5MW主轴轴承的额定动载荷得到了较大的提升,同时其滚动体与内圈之间的最小油膜厚度提高了近5%.研究结果表明该方法对于风机主轴轴承可靠性优化设计具有指导意义.As the core equipment of wind turbine, the mainshaft bearing's reliability should not been neg-lected ,especially for lubrication effect. In this paper,based on the elastohydrodynamic lubrication charac-teristics ,the optimal model of double-row radial spherical roller mainshaft bearing is set up by considering the minimum oil thickness of the rough surface between cone and roller. The the dynamic load rating of the mainshaft bearing is set as the objective function. The number of rollers in one row, the average diameter of roller, the effective contact length of the roller and the wall thicknesses are set as the design parameters. The bearing is optimized with the globalsearch method, and the MATLAB is used as the research tool. The optimized mainshaft bearings of 1.5 MW wind turbine have higher dynamic load rating. Moreover, the minimum oil film thickness between cone and roller increases by approximate 5%. The experimental results show that it is significant for the optimized reliability design of mainshaft bearing.

关 键 词：风机 主轴轴承 润滑 全局搜索法 优化设计 

分 类 号：TH133.3[机械工程—机械制造及自动化]