摘要
以额定工况下功率分流型2.5 MW风电齿轮箱一级太阳轮为研究对象,采用弹流润滑理论计算轮齿的接触压力分布,利用断裂力学的相关知识分析了齿轮初始裂纹扩展成微点蚀的机理;在ABAQUS软件中建立了一级太阳轮的点蚀模型,在考虑弹流润滑的情况下运用扩展有限元法模拟了在初始裂纹为20μm下一级太阳轮微点蚀的形成过程;根据模拟数据,计算得到了裂纹尖端的应力强度因子,运用Paris公式建立了裂纹扩展长度和应力循环次数间的关系,并分析了不同初始裂纹长度下,裂纹的扩展特性。
This paper studies the first sun gear of 2.5 MW wind turbine gearbox with power shunt.The contact pressure distribution of gear is calculated by using the theory of the elastohydrodynamic lubrication.The mechanism of the initial crack propagation to micro pitting is analyzed by using the related knowledge of fracture mechanics.In the ABAQUS software,a pitting model of the first sun gear is established.The extended finite element method is used to simulate the formation of micro-pitting at cracks (20 μm) under the condition of EHL.Based on the simulation data,the stress intensity factor of the crack tip is calculated.The relationship between the crack propagation length and the number of stress cycles is established by the Paris formula.The crack propagation characteristics under different initial crack lengths are analyzed.
作者
潘骏
李旭平
贺青川
陈文华
PAN Jun;LI Xuping;HE Qingchuan;CHEN Wenhua(National and Local Joint Engineering Research Center of Reliability Analysis and Testing for Mechanical and Electrical Products,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《机械工程师》
2019年第1期27-30,共4页
Mechanical Engineer
基金
国家国际科技合作专项资助(2015DFA71400)
关键词
风电齿轮箱
弹流润滑
微点蚀
ABAQUS
wind turbine gearbox
elastohydrodynamic lubrication
mcro-pitting
ABAQUS
