利用面接触润滑油膜测量系统，在限量润滑油供给条件下研究了润滑油膜特性.同时，定义了相对油膜厚度，即限量供油与充分供油条件下的油膜厚度之比，用于表征限量供油下润滑油膜承载力的变化情况.结果表明，在限量供油条件下，随着玻璃盘的速度增大，油膜厚度先增加，随后，乏油的出现使得油膜厚度几乎保持不变.由于在润滑轨道上没有充分的润滑油回充，润滑油的黏度和回流时间对润滑膜的形成影响很大.只有当乏油变得严重时，入口乏油区才会承受一定载荷.
Using an optical slider-bearing test rig, the characteristics of lubrication film were studied under condition of limited lubricant supply. A relative film thickness, that is the ratio between the measured film thickness with limited lubricant supply and that with full lubricant supply, was defined to assess the reduction of load-carrying capacity by limited lubricant supply. It was found that when a small quantity of lubricant is supplied, the film thickness increases at first and then remains nearly unchanged with increasing speeds due to development of starvation. Results show that the lubricant viscosity and the reflow time between two slide-overs can markedly affect the film building due to the inadequate lubricant replenishment on the lubrication track. The inlet starvation area may bear some load only when the starvation becomes severe.
［1］MANG T. Encyclopedia of Lubricants and Lubrication［M］. Berlin, Germany: Springer, 2014.
［2］ZENG Q, ZHANG J, HONG J, et al. A comparative study on simulation and experiment of oil-air lubrication unit for high speed bearing［J］. Industrial Lubrication and Tribology, 2016, 68(3): 325-335.
［3］HOHN B R, MICHAELIS K, OTTO H P. Minimised gear lubrication by a minimum oil/air flow rate［J］. Wear, 2009, 266(3/4): 461-467.
［4］NSK. NSK develops super long-life needle roller for automobile transmissions［EB/OL］. ［2016-12-16］. http:∥www.nsk.com/company/news/2016/press1216a.html.
［5］LEONG J Y, REDDYHOFF T, SINHA S K, et al. Hydrodynamic friction reduction in a MAC-hexadecane lubricated MEMS contact［J］. Tribology Letters, 2013, 49(1): 217-225.
［6］KINGSBURY E. Parched elastohydrodynamic lubrication［J］. Journal of Tribology, 1985, 107(2): 229-233.
［7］GUANGTENG G, CANN P M, SPIKES H A. A study of parched lubrication［J］. Wear, 1992, 153(1): 91-105.
［8］HAMROCK B J. Fundamentals of fluid film lubrication ［M］. New York, USA: McGraw-Hill, 1994.
［9］WIJNANT Y H. Contact dynamics in the field of elastohydrodynamic lubrication［D］. Netherland: Universiteit Twente, 1998.
［10］CHEVALIER F, LUBRECHT A A, CANN P M E, et al. Film thickness in starved EHL point contacts［J］. Journal of Tribology, 1998, 120(1): 126-132.
［11］ELROD H G, ADAMS M L. A computer program for cavitation and starvation problems［C］∥Proceedings of the 1st Leeds-Lyon Symposium on Tribology. London, England: Mechanical Engineering Publications, 1974: 37-41.
［12］GUO F, WONG P L, FU Z, et al. Interferometry measurement of lubricating film in slider-on-disc contacts［J］. Tribology Letters, 2010, 39(1): 71-79.
