直齿轮啮合传动加载接触特性分析  

Research of spur gear meshing loading contact characteristics

作　　者：张红涛[1,2] 周长江[1,2] 孙银方 

机构地区：[1]湖南大学车身先进设计与制造国家重点实验室,湖南长沙410082 [2]湖南大学机械与运载工程学院,湖南长沙410082

出　　处：《制造技术与机床》2015年第7期55-60,共6页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金(51275160);国家重点基础研究发展计划项目(2010CB832700)

摘　　要：依据滚齿加工原理和虚拟制造技术,在三维建模软件中模拟圆柱直齿轮的切削过程,得到齿槽切割模型。以切割迹线为基准进行齿面重构,获得精度较高的直齿轮三维几何模型。基于准静态荷载下有限元计算原理,创建直齿轮三维接触模型。通过对齿轮进行齿面接触分析,计算齿轮啮合过程中的接触力与接触应力,得到齿根最大弯曲应力和齿面最大接触应力。基于Hertz面分布力接触模型,计算啮合过程中齿面接触应力变化规律。比较解析计算与数值计算结果,两者基本一致,表明了啮合接触有限元模型的可靠性。上述研究为进一步探讨轮齿疲劳破坏具有积极的意义,并且在齿轮优化方面具有一定的实用价值。According tained trace, by to hobbing principle and virtual machining technology, the cutting model of tooth could be ob- simulating the cutting process of spur gear in the modeling software. On the base of the cutting high precise three - dimensional geometric model of spur gear is created by refactoring the surfaces of teeth. Based on the finite element calculation technique of gear under quasi - static loading, contact finite element analysis model of gear is set up. By carrying out the tooth contact analysis, the contact forces and stresses between the tooth pairs in gear meshing process are calculated, and the maxi- mum tooth root bending stress with maximum contact stress of tooth surface are obtained. Gear contact model with Hertz surface distributed forces is researched and the variations of tooth surface contact stres- ses are theoretically calculated. Analytical solution and numerical results are basically the same by com- paring, which proved the reliability of the finite element model. The studies are of positive significance for the further study of fatigue damage of teeth and have a certain practical value to the optimization of gears.

关 键 词：齿轮啮合 虚拟制造 准静态载荷 HERTZ接触 接触应力 

分 类 号：TH132.4[机械工程—机械制造及自动化]