摘要
首先通过实测获得了一系列具有横向纹理的表面粗糙度数据;然后,借助傅里叶非线性变换拟合出粗糙度函数,并将其叠加到油膜厚度方程中形成了混合热弹流润滑模型;基于此模型,针对中、重载渐开线直齿圆柱齿轮传动,通过改变粗糙度数据共进行了280组数值计算。计算结果显示:当齿面粗糙度的均方根值σ≤0.3μm时,粗糙齿面接触时的主剪应力最大值τ_(max,r)仅比光滑齿面的相应值τ_(max,s)大5%左右;但当σ≥0.5μm时,τ_(max,r)比τ_(max,s)约大15-20%。通过对计算结果的回归分析,建立了中、重载齿轮传动粗糙度系数的理论公式。
The surface roughness data of test-pieces with transverse profiles were firstly measured by a roughness profile measuring analyzer. With the help of the Fourier nonlinear approximation the measured data were used to form a roughness function which was superimposed to film thickness equation and a mixed thermal elastohydrodynamic lubrication model was then established. Based on the model, 280 sets of numerical calculations were carried for both medium and heavy duty transmissions through changing the roughness values. The results show that the contact stress r for rough teeth surfaces is increased by 5% compared with the contact stress r for smooth teeth surfaces when the root mean square roughness of tooth surface σ ≤ 0. 3 /.Lm;While the r is increased by 15 -20% compared with the r when σ≥0. 5 μm. At the end, several theoretical formulas for determining the roughness factors are created based on the multiple regression analysis of the above calculated results.
作者
高创宽
周忠可
GAO ChuangKuan ZHOU ZhongKe(Department of Applied Engineering, Hangzhou Wanxiang Polytechnic, Hangzhou 310023, China Technical Center, Great Wall Motor Company Limited, Baoding 071000, China)
出处
《机械强度》
CAS
CSCD
北大核心
2016年第5期1113-1117,共5页
Journal of Mechanical Strength
基金
国家自然科学基金面上项目(50975189)资助~~
关键词
齿轮传动
接触应力
横向粗糙纹理
粗糙度系数
Gear transmission
Contact stress
Transverse rough features
Roughness factors
