摘要
在王晓力等的基于平均流量模型的广义Reynolds方程的基础上,进一步建立了综合考虑流体的非牛顿特性、可压缩性、齿面粗糙度效应及热效应的线接触混合弹流润滑的广义Reyn-olds方程;并采用多重网格法求解润滑方程组,采用逐列扫描步进法求解温度控制方程,获得了渐开线齿轮传动混合热弹流润滑的完全数值解。对部分算例,分别分析了一对轮齿从入啮到脱啮的整个啮合过程中最大主剪应力和平均油膜厚度的变化规律。计算结果表明,计入齿面的粗糙度效应后,轮齿接触应力显著增大,这必然会对轮齿接触疲劳强度产生重要影响,因此,基于Hertz理论进行齿轮接触疲劳强度设计有失安全性。
In this paper,a generalized Reynolds equation for linear contact problem is deduced based on the average flow model,four factors of the lubricating oils taken into account including non-Newtonian characters, compressible characters, surface roughness and thermal effects. The full numerical solutions of mixed EHL of involute gear transmission are acquired through multigrid method. For some calculating cases, it is analyzed that how the primary shearing stress and the average film thickness change during the whole course from the beginning to the end of meshing, The results indicate that , the contact stress increases markedly if taking into account the gear-tooth roughness, which has great effect on the gear tooth contact fatigue strength. Therefore the current theory for designing the fatigue strength which is based on Hertz theory needs to be improved.
出处
《太原理工大学学报》
CAS
北大核心
2006年第1期13-15,共3页
Journal of Taiyuan University of Technology
基金
山西省自然科学基金资助项目(20041057)
关键词
粗糙齿面
混合润滑
非牛顿流体
热效应
rough teeth faces
mixed lubrication
non Newtonion fluid
thermal effect
