具有半球形凹坑表面的滑动轴承润滑分析

Lubrication Analysis on the Journal Bearing with the Semi-spherical Pits Surface

具有非光滑表面的滑动轴承具有一些独特的性质,适当的表面凹坑对径向滑动轴承的润滑性能可能有一定的改善作用。为研究球形凹坑对径向滑动轴承润滑特性的影响,本文建立了具有不同形式球形凹坑的径向滑动轴承润滑分析的数学模型。利用有限差分法进行求解,得到径向滑动轴承的油膜压力与承载力,并研究凹坑的个数、尺寸、分布规律及凹坑深度对径向滑动轴承的润滑特性的影响。计算结果表明:与光滑面相比,在充分润滑状态及轴承几何运动参数不变情况下,合理的凹坑个数、尺寸参数、分布形式及凹坑深度对提高径向滑动轴承的油膜压力及承载能力具有一定的改善作用。

There are some special function for the journal bearing with non-smooth surfaces. The lubrication performance can be improved when there are proper distributing pits on surface of the bearing. The mathematical model of lubrication analysis is established to study the tribological property of the bearing with semi-spherical pits on its surface.The finite difference method is applied to solve the model. The oil film pressure distribution and the value of load of the bearing can be calculated as well as the relationship is obtained between lubrication behavior of journal bearing and the geometrical property of semi-spherical pits on the bearing surface such as the number,size,depth of pits and the distribution mode. The calculation results show that compared to the smooth surface bearing,the lubrication behavior such as the maximum oil film pressure and the oil film force of the bearing can be improved to some extent for the bearing with semi-spherical pits on the bearing surface working in the sufficient lubrication stable state.