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，阐明了非圆形滑动轴承中由于多个收敛和多个发散的轴承间隙而出现和消失的油膜破裂区域的饥饿对润滑机制的影响。在理论研究中，讨论了椭圆和多偏心圆轴承。考虑了油膜分解和油膜改造，讨论了多油膜区域连接到单油膜区域以及相对于轴承宽度方向的不完全油膜形成。通过引入新的临界润滑边界条件，用直线逼近边界几何，用计算机分析了这类自由边界问题。计算了薄膜形成和破裂区域的形状、压力分布和承载能力。在实验研究中，椭圆和圆形滑动轴承采用透明材料制成。轴承间隙几何特别是椭圆轴承和油膜压力测量和手动放大器，移位和限位电气系统使用。通过实验结果与理论结果的比较，阐明了缺油润滑对圆形和非圆形滑动轴承承载性能的影响。

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.