Theoretical and Experimental Research of Generalized Starved Lubrication Theory for Journal Bearings

为了建立滑动轴承的广义饥饿润滑理论，阐明了非圆径向滑动轴承由于多收敛和多扩散间隙而出现和消失油膜破裂区域的润滑机理，并对椭圆和多偏心圆轴承进行了理论研究。考虑了油膜破裂和油膜改造，并将多个油膜区连接到单个区域，讨论了轴承宽度方向上的不完全油膜形成。通过引入饥饿润滑的新边界条件和用直线逼近边界几何，用计算机分析了这类自由边界问题。计算了成膜区和破裂区的形状、压力分布和承载能力。在实验研究中，在透明材料上制作了椭圆和圆形滑动轴承。测量了特别是椭圆轴承的轴承游隙几何形状和油膜压力，并使用了手动填充的安培、换档和限位电气系统。通过实验结果与理论计算结果的对比，阐明了贫化润滑对圆形和非圆径向滑动轴承性能的影响。

To establish an generalized starved lubrication theory for journal bearings, it is clarified that the effects of starvation on lubrication mechanism in which regions of oil film break down appear and disappear due to multi convergent and multi divergent bearing clearances in non circular journal bearings.In theoretical study, elliptical and multi eccentric circular bearings are discussed. The oil film break down and the oil film reformation are considered, and the multi oil film regions are connected to single region and an incomplete film formation with respect to width direction of bearings are discussed. By introducing new boundary conditions for starved lubrication and approximating the boundary geometry by some straight lines, such free boundary problems are analyzed by computer. Shapes of film formation and break down regions, pressure distribution and load capacity are calculated.In experimental study, elliptical and circular journal bearings are made on transparent material. Bearing clearance geometry for especially elliptical bearings and oil film pressure are measured and hand madded amp, shift and limit electrical system is used. By comparing the experimental results with the theoretical ones, influences of starved lubrication on bearing performance of circular and non circular journal bearings are clarified.