表面粗糙度对过盈配合轴承的影响

摘要

基于滑动轴承的表面粗糙度会对过盈配合的性质产生一定的影响的假设,提出一种通过自底向上建模的方式和APDL语言编程构造出符合高斯分布的表面形貌三维模型的新方法.该方法利用表面粗糙度和轮廓算术平均偏差的关系,以及高斯随机数生成函数模拟表面粗糙度对过盈配合滑动轴承性能的影响.结果表明:计入表面粗糙度的影响时,在相同的过盈量下,得到的接触压力更大,且接触压力云图按轴向均匀分布,符合所加对称约束条件,证实滑动轴承的表面形貌在一定程度上影响着过盈配合的性质.%Considering the hypothesis that surface roughness of bush bearing has some influence on the interference fit's characteristics,a novel bottom-up approach with APDL language programming was developed to generate a three-dimen-sional microtube surface consistent with Gaussian distribution. This approach can simulate the influence of surface roughness on the performance of bearing with interference fit using the relationship between surface roughness and arithmetical mean deviation of the profile and Gaussian random number generator function. The results show that the bearing has bigger contact pressure when considering surface roughness under the same amount of interference, the contact pressure contour distributes uniformly by axial in line with the symmetric constraint. It proves that the surface morphology has some influence on the performance of bearing with interference fit.