基于围道积分的润滑接触齿轮微点蚀损伤特征模拟  

Numerical simulation of micro pitting damage characteristics of lubricated contact gears based on contour integral

作　　者：赵洋 肖洋 孙皓 霍文浩 冯松 廖勇[1] ZHAO Yang;XIAO Yang;SUN Hao;HUO Wen-hao;FENG Song;LIAO Yong(School of Electrical Engineering,Chongqing University,Chongqing 400044,China;School of Advanced Manufacturing Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi'an Jiaotong University,Xi’an 710039,China;Chongqing General Industry(Group)Co.,Ltd.,Chongqing 401336,China)

机构地区：[1]重庆大学电气工程学院,重庆400044 [2]重庆邮电大学先进制造工程学院,重庆400065 [3]西安交通大学机械结构强度与振动国家重点实验室,西安710039 [4]重庆通用工业(集团)有限责任公司,重庆401336

出　　处：《吉林大学学报（工学版）》2022年第4期799-810,共12页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51807019,51705057);机械结构强度与振动国家重点实验室开放基金项目(SV2020-KF-15);重庆市教委科学技术研究项目(KJZD-K201900604);重庆市博士后科研项目(XmT2018030)。

摘　　要：基于围道积分的方法提出了一种考虑润滑接触对的齿轮齿面微点蚀模拟方法,通过建立其二维有限元数值模型,研究微点蚀裂纹扩展过程中的损伤特征,即应力强度因子变化规律及最终齿面点蚀形貌。润滑接触对模型考虑了齿轮相互接触载荷、接触关系以及弹流润滑条件。在ABAQUS中计算得到裂纹尖端处的应力强度因子KI、KII以及扩展角θC,然后根据最大切向应力(MTS)准则计算等效应力强度因子Kσ并作为裂纹扩展的判别条件,进一步地探讨不同润滑状态对微点蚀的形成影响。结果表明:齿轮间充分润滑时,KI和Kσ随着裂纹长度的增加而快速增大,形成的点蚀坑更小;润滑不足时,KI和Kσ随着裂纹长度变化缓慢,形成的点蚀区域更大。研究结果可为后续微点蚀齿轮的接触疲劳寿命分析、在线磨损监测以及啮合刚度计算提供理论支持。A method was proposed to simulate the micro pitting on gear tooth surface considering the lubrication contact pair based on the contour integral,and the damage characteristics of micro pitting,i.e.,the variation law of stress intensity factor and the final pitting morphology of tooth surface were studied by establishing its two-dimensional finite element numerical model. The contact loads,interactions and elastohydro dynamic lubrication(EHL)conditions of the gears were considered in the lubrication contact model.The stress intensity factors KI,KIIand the propagation angle θCat the crack tip were calculated by ABAQUS. Then the equivalent stress intensity factor Kσwas calculated according to the maximum tangential stress(MTS)criterion and used as the criterion for crack propagation. The influence of different lubrication conditions on the formation of micro pitting was further discussed. The results indicate that KI and Kσare increasing rapidly with larger crack length and the size of pitting is smaller when the gears are lubricated adequately. By contrast,KIand Kσare changing slowly with crack length and the size of pitting is larger when the gears are sparely lubricated. The research results can provide theoretical support for contact fatigue life analysis,on-line wear monitoring and meshing stiffness calculation of micro-pitting gears.

关 键 词：机械设计及理论 微点蚀 围道积分 损伤特征 最大切向应力准则 润滑状态 

分 类 号：TH117.1[机械工程—机械设计及理论]