【摘要】 通过测量获得了不同纹理方向的齿面粗糙度数值,利用傅里叶非线性变换原理,回归出近似真实分布的齿面粗糙度曲线方程。基于此模型,改变润滑油黏度,进行了57组数值计算,得出平均油膜厚度以及轮齿接触区次表面主剪应力的数值解。结果表明:随着粘度的变化,纵向粗糙纹理的平均膜厚小于光滑接触时的平均膜厚;横向粗糙纹理的平均膜厚大于光滑接触时的膜厚值。此外,次表面主剪应力最大值都大于光滑接触时的相应数值。所以横向纹理的润滑效果比纵向纹理的更佳。更多还原

【Abstract】 The surface roughness data of test-pieces with different roughness profiles were measured by a roughness profile measuring analyzer.With the help of the Fourier approximation the measured data were used to form a roughness function.Based on this model,57 groups of numerical calculations were carried out through the changing of lubricant viscosities and the numerical solutions for both the average oil film thickness and the subsurface shear stress were achieved.Results show that with the change of viscosity,the average film thickness of the longitudinal profiles is less than the corresponding value of smooth contact and average film thickness of transverse profiles is greater than the value of smooth contact.In addition,the maximum values of subsurface principal shear stress for rough surfaces contact are always greater than the corresponding value for smooth surface contact.So the lubricating effect of the transverse profiles is better than that of longitudinal profiles.更多还原