摘要
风力发电机偏航轴承结构参数复杂,工作条件特殊,笔者通过仿真确定偏航轴承优化的结构参数,使此种轴承的疲劳寿命长,减少轴承在风场中的维修次数;采用有限元分析方法,建立了风电偏航轴承的三维有限元仿真模型,应用典型的联合载荷和边界条件,对各种不同接触角的轴承模型进行疲劳寿命分析,得出了轴承承载过程中的疲劳安全因子、疲劳寿命的相互关系。结果表明:接触角是35°时的轴承疲劳寿命强,疲劳寿命薄弱处的位置在轴承钢球与内圈的接触处,接触点与公称接触点不重合,而且载荷不同,接触点也不同。
Optimized structure parameters for the yaw bearing of a wind power generator are determined by simulation.This allows the fatigue life of such a bearing to be longer,and maintenance frequency of bearings in the wind plant is reduced.A three-dimensional model is firstly established for wind power generator yaw bearings using the finite element analysis method.Then the fatiguing analysis of bearing models under different contact angle is conducted based on combined radial and thrust loading and boundary conditions whereby the fatigue parameters such as fatigue safety factor and fatigue life is obtained for wind power generator yaw bearings in the loading process.The simulation results indicate that（1） when the contact angle is 35°,the bearing has better fatigue life;（2） the fatigue life of the bearing is weaker when its ball is in contact with the inner ring;（3） the contact point does not coincide with the nominal point;（4） when loads are different,the contact point position is different.
出处
《机械科学与技术》
CSCD
北大核心
2011年第1期30-35,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(50975229)
陕西省"13115"科技创新工程重大科技专项基金项目(2009ZDKG225)
陕西省重点学科建设专项资金项目(2009-178)资助
关键词
风力发电机
轴承
接触角
仿真
疲劳寿命
有限元分析
wind power generator
bearings
contact angle
simulation
fatigue life
finite element analysis
