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

点击翻译按钮获取中文摘要

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.