齿廓修形机理及其对温度场的影响  

Tooth Profile Modification Mechanism and Its Influence on Temperature Fields

作　　者：薛建华[1] 李威[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《东北大学学报（自然科学版）》2013年第12期1763-1767,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51275035)

摘　　要：通过解析法和有限元法计算了轮齿刚度,基于刚度研究了齿廓修形机理及加工误差对载荷分配系数、传动误差和温度场的影响.结果表明:长修形在减小啮合冲击上优于短修形,当长修形指数为1.22时传动误差波动最小,传动最平稳.轮齿修形可以改善轮齿本体温度和闪温分布,使本体温度和闪温的高温区域从齿根、齿顶移动到齿廓中部,降低齿顶和齿根的最高温度,提高了轮齿胶合承载能力.加工误差会减弱轮齿修形效果,引起动载荷和瞬时高温,因此确定修形量时应考虑加工误差、跑合磨损以及热弹变形.The tooth stiffness was calculated by the analytical method and the finite element method. The tooth profile modification mechanism and the influence of machining errors on load- sharing ratio, transmission errors and temperature fields were analyzed by stiffness method. The results show that the long modification is superior to the short modification in reducing meshing shock. The transmission errors fluctuation is the smallest and transmission is the smoothest when long modification index equals 1.22. The profile modification can alter the distribution of the bulk and flash temperature, and translate the high temperature zone from tooth root and addendum to the tooth profile central. Thus the highest temperature of the tooth root and addendum reduces and the scuffing load capacity is improved. The machining error can weaken the profile modification effect and cause dynamic load and instantaneous high temperature. The machining errors, running- wear, and thermal elastic deformation should be considered when setting the amount of profile modification.

关 键 词：齿廓修形 温度场 啮合刚度 传动误差 载荷分配系数 

分 类 号：TH132.413[机械工程—机械制造及自动化]