风电渗碳齿轮内部疲劳断裂可靠性研究  

Study on the reliability of tooth interior fatigue fracture in carburized wind turbine gear

作　　者：柏厚义 朱才朝[1] 周烨[1] 陈晓金 冯厚斌 叶伟 BAI Houyi;ZHU Caichao;ZHOU Ye;CHEN Xiaojin;FENG Houbin;YE Wei(State Key Lab of Mechanical Transmissions,Chongqing University,Chongqing 400044,China;R&D Center,Chongqing Wangjiang Industrial Co.,Ltd.,Chongqing 400071,China)

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]重庆望江工业有限公司民品研发中心,重庆400071

出　　处：《振动与冲击》2023年第7期106-113,132,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(51975063,U2141247);中国博士后基金面上项目(2021M690176)。

摘　　要：齿轮内部疲劳断裂作为风电渗碳齿轮典型失效形式,是限制风电齿轮箱服役性能提升的瓶颈之一。基于应力强度模糊干涉函数和齿轮材料强度退化理论,结合风电LDD载荷与Dang Van多轴疲劳准则建立渗碳齿轮内部疲劳断裂可靠度分析模型,通过与某2 MW风电齿轮失效样本进行对比验证了模型的适用性。采用因子试验设计方法分析齿轮硬度梯度和微观修形对内部疲劳断裂失效的影响,通过材料暴露系数回归方程进行望小优化设计获得主因子最佳参数匹配。研究结果表明心部硬度、齿向鼓形对内部疲劳断裂失效影响权重最大,通过优化设计将该齿轮副内部疲劳断裂可靠度由0.968 399提高至0.972 678。Tooth interior fatigue fracture(TIFF),as the typical failure mode of carburized wind turbine gear,is one of the major limitations to improve the service performance of wind turbine gearbox.This work developed a TIFF reliability analysis model of carburized gear based on the stress-strength interference fuzzy function and material strength degradation theory.The equivalent stress is calculated using load duration distribution(LDD)method and Dang Van multi axial fatigue criterion.The model is verified by comparing with gear failure sample coming from a 2 MW wind turbine.The effects of gear hardness gradient and micro-modification on TIFF is discussed in detail.The optimization of design parameters is obtained with the regression equation of material exposure.The results show that the core hardness and lead crown are the main influencing factor of TIFF.With the developed optimizing design,the TIFF reliability of discussed gear pair is improved from 0.968399 to 0.972678.

关 键 词：风电齿轮 轮齿内部疲劳断裂(TIFF) 可靠度 强度退化 硬度梯度 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3