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粘塑性流体的界面滑移对润滑性能的影响研究

STUDY ON INFLUENCE OF THE BOUNDARY SLIP OFVISCO-PLASTIC LUBRICANT ON THE LUBRICATIONPROPERTIES

  • 摘要: 首先指出经典润滑理论中的边界无滑移条件已不再适用于具有极限剪应力的粘塑性流体润滑.而后,通过确定最大剪应力位置和加入剪应力边界条件,建立了界面滑移后的润滑方程.在联立求解不同区域的润滑方程基础上,对界面滑移的开始位置及扩展方式进行了分析.最后,讨论了不同膜厚比下滑移对润滑性能的影响.

     

    Abstract: Hydrodynamic lubrication theory based on viscous fluid mechanics has greatly devel-oped the tribology theory. However, because the mechanical equipment is developed with muchhigher speed and larger scale in recent years, lubrication failure occurs frequently. In electric gen-erator sets and mill trains, accidents caused by lubrication failure cost great lost. According tostatistics of the former Soviet Unions, 60 percent of the accidents in hydroelectric generator setsare caused by lubrication failure. The ...

     

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