含摩擦齿根弯曲应力载荷历程计算与测试  

Calculation and Test of Root Bending Stress Under Load-history Including Friction

作　　者：周长江[1,2] 解亚宁[1] 黄操[1] 钱炫吕 

机构地区：[1]湖南大学国家高效磨削工程技术研究中心,湖南长沙410082 [2]中南大学高性能复杂制造国家重点实验室,湖南长沙410083

出　　处：《机械传动》2016年第11期111-116,共6页Journal of Mechanical Transmission

基　　金：国家自然科学基金(51275160);高性能复杂制造国家重点实验室开放课题基金(Kfkt2014-03)

摘　　要：以主动轮齿为对象,考虑法向力和摩擦力的共同作用,研究齿对从进入到退出啮合过程中齿面摩擦对弯曲强度的影响。根据齿面摩擦力的变化规律,提出以分度圆为界将啮合区划分为上啮合区和下啮合区,推导出不同啮合区的含摩擦齿根弯曲强度计算式。实例计算显示,上啮合区考虑摩擦比不考虑摩擦齿根弯曲应力值约大3%;下啮合区考虑摩擦比不考虑摩擦齿根弯曲应力值约小4%;齿根弯曲应力在节点处的突变较好地反映了摩擦力在该点的突然换向。测试结果与计算值比较表明,齿根弯曲应力历程曲线的变化趋势一致;若计算式中引入动载系数,测试值与计算值的偏差小于10%。测试结果初步验证了上述计算模型的正确性,考虑摩擦时齿根弯曲应力计算值更可靠。The effect of tooth surface friction from mesh - in to mesh - out on bending strength is researched, including the normal and friction force of the driving gear. Based on the variation of tooth surface friction, the engaging region is divided into the upper and lower regions bounded by pitch circle, and then the calculation equations of root stress in different meshing regions are derived. The case shows that the root bending stress with friction is 3% bigger than the one without friction in the upper region, but that the stress with friction is 4% smaller than the one without friction in the lower region. The mutation of the root bending stress is in line with the direction reverse of friction force at pitch point. The experimental and calculating results show that the curves of root bending stress are basically consistent and that the deviation is within 10% when the dynamic load factor is considered in the calculation equations. The calculation model preliminarily is verified by the experimental results, and the calculation equation of tooth root bending stress including friction is more reliable.

关 键 词：齿轮传动 齿根弯曲应力 齿面摩擦 载荷历程 测试 

分 类 号：TH132.41[机械工程—机械制造及自动化]