对数修形斜齿轮的接触分析  

Contact Analysis of Helical Gear with Logarithmic Modification

作　　者：金亭亭 汪久根[1] 

机构地区：[1]浙江大学机械工程学系,浙江杭州310027

出　　处：《机械传动》2014年第2期118-122,共5页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(50775202);浙江省自然科学基金重点项目(Z1100475);浙江省滑动轴承工程技术研究中心建设计划(2012E10028)

摘　　要：齿轮修形能减少轮齿边缘应力集中,提高其接触疲劳强度。首次将对数修形曲线应用在斜齿圆柱齿轮修形设计上,建立了斜齿轮接触分析的力学模型,计算分析单齿啮合及双齿啮合时接触区内接触应力分布以及轮齿表层内Mises应力场。结果表明,在不同啮合位置轮齿端部应力集中程度不同;对数修形后的斜齿轮轮齿端部应力集中状况得到了显著的改善;不同接触线上的修形量不同,使得不同啮合位置齿面修形达到相同效果。Gear tooth modification can reduce the stress concentration at the edges of the gear tooth and improve the fatigue life of gear. The logarithmical modification curve is first applied on heli- cal gears, and the contact analysis mechanical model of helical gear is established. The distributions of contact stress and Mises stress field inside subsurface layer at single and double meshing state are ob- tained. The results show that the level of stress concentration changes with the meshing position of the gear tooth, and that the stress concentration of the contact stress and the Mises stress inside subsur- face at the tooth ends are improved through the logarithmical modification, and that the modification a- mount of different contact lines varies with meshing positions to achieve the same modification effect.

关 键 词：斜齿轮 对数修形 边缘效应 Mises应力场 

分 类 号：TH132.41[机械工程—机械制造及自动化]