| 粗糙表面滑动轴承非牛顿介质润滑的计算 | |
| 陈皓生 ; 陈大融 ; 汪家道 ; 李永健 ; CHEN Hao-sheng ; CHEN Da-rong ; WANG Jia-dao ; LI Yong-jian | |
| 2010-06-08 ; 2010-06-08 | |
| 关键词 | 非牛顿介质 流变 表面形貌 滑动轴承 non-Newtonian medium,rheology,surface roughness,journal bearing TH117.2 |
| 其他题名 | Calculated Journal Bearing Lubrication of Non-Newtonian Medium with Surface Roughness Effects |
| 中文摘要 | 分析了轴承润滑中非牛顿介质的流变特性以及轴承表面形貌对润滑效果的影响,推导出了修正的雷诺方程,在方程中用差分粘度和第一正应力差函数表征非牛顿介质的流变特性,采用流量因子表征表面形貌的作用.结果表明:差分粘度的变化是影响润滑结果的主要因素,它取决于不同介质的动态参数和剪切频率范围,非牛顿介质润滑的承载力并非总高于或低于牛顿介质;在动载荷条件下,第一正应力差效应使油膜压力明显增大;影响流量因子的2个因素为表面形貌的粗糙度和纹理,但其作用远小于非牛顿介质流变特性的影响.; To analyze the effects of non-Newtonian lubricants and surface roughness in journal bearing lubrication,a modified Reynolds equation is derived.In the equation,differential viscosity and the first normal stress function are defined to specify the rheological properties of non-Newtonian medium,flow factors are used to specify the effect of surface roughness.Modified Reynolds equation is numerically calculated using super over relaxation method.Numerical results of lubrication show that differential viscosity is the principal non-Newtonian properties affecting lubrication,it is determined by material parameters of lubricant and is affected by shearing rate.Under the effect,load capacity of non-Newtonian lubricants is not always higher or lower than that of Newtonian lubricants'.Effect of the first normal stress difference increases under dynamic load.Surface roughness shows obvious effect on load capacity when it is greater than 1/10 film thickness,and surface with longitude pattern affects load capacity most.However,surface roughness takes less effect on lubrication than lubricants' non-Newtonian property does.; 高等学校博士学科点专项科研基金资助项目(20030003026); 国家自然科学基金资助项目(50475018) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/48532]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 陈皓生,陈大融,汪家道,等. 粗糙表面滑动轴承非牛顿介质润滑的计算[J],2010, 2010. |
| APA | 陈皓生.,陈大融.,汪家道.,李永健.,CHEN Hao-sheng.,...&LI Yong-jian.(2010).粗糙表面滑动轴承非牛顿介质润滑的计算.. |
| MLA | 陈皓生,et al."粗糙表面滑动轴承非牛顿介质润滑的计算".(2010). |
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