风力机变桨轴承热力学分析
魏瑞涛，岑海堂*，田文良，孙亮
（内蒙古工业大学 机械学院，呼和浩特 010051）
摘要：变桨轴承是确保风力机变桨机构正常稳定运行的关键部件。针对风力机变桨轴承的因摩擦升温而导致的轴承老化和磨损问题，建立风力机变桨轴承的三维模型，并对轴承模型进行热力学仿真分析。仿真结果显示，风力机稳态运行时，变桨轴承的下滚道比上滚道平均温度要高；当摩擦系数从0.02增长到0.1时，轴承的最高温度大幅度上升；在温度场和载荷同时存在的情况下，对比只施加载荷的情况，轴承所受最大应力大了约三倍。该研究对于提高风力机变桨轴承的可靠性、完善变桨轴承设计方法具有参考价值。
关键词：风力机；变桨轴承；磨损；热力学分析
中图分类号：TG111.3 文献标志码：A doi：10.3969/j.issn.1006-0316.2017.10.002
文章编号：1006－0316 (2017)10－0008－06
Thermodynamic Analysis of Wind Turbine Bearing
WEI Ruitao，CEN Haitang，TIAN Wenliang，SUN Liang
( College of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China )
Abstract：Pitch bearing is the key component to ensure the normal and stable operation of wind turbine propeller mechanism. In view of the problem of bearing aging and wear caused by friction heating of wind turbine pitch bearings, a three-dimensional model of wind turbine pitch bearing is established, and the bearing model is simulated and analyzed by thermodynamics. The simulation results show that the average temperature of the lower raceway of the pitch bearing is higher than the upper raceway when the wind turbine is in steady operation. When the friction factor increases from 0.02 to 0.1, the maximum temperature of the bearing rises substantially. When the temperature field and load exist simultaneously, the maximum stress of the bearing is about 3 times compared with the case of loading only. It has reference value for improving the reliability of wind turbine pitch bearing and improving the design method of pitch bearing.
Key words：wind turbines；pitch bearing；wear；thermodynamic analysis
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收稿日期：2017－03－28
基金项目：国家自然科学基金（51365031）；风能太阳能利用技术省部共建教育部重点实验室开放基金（201607）
作者简介：魏瑞涛（1993－），男，河北衡水人，硕士研究生，主要研究方向为风力机叶片设计与风能利用。*通讯作者：岑海堂（1967－），男，内蒙古卓资人，博士，教授，主要研究方向为风力机叶片设计与风能利用。
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