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弹性流体动力润滑(以下简称弹流)和边界润滑、流体动力润滑一样,已经发展成为一种公认的润滑状态,其理论也已得到不断的充实和发展,同时,在实际应用方面也取得可喜的效果。弹流作为一项通用理论,它的价值不局限在分析机械零件的运动上,在其他很多领域中,例如轮胎在潮湿路面上的溜滑,人造关节的运动等许多生活现象中,也都受弹流理论的支配。所以国际上某些权威学者认为,弹流理论的建立是经典雷诺方程创立以来,在近代润滑理论中最最重要的进度。一、流体润滑理论简述 1886年雷诺深入研究了滑动轴承的润滑问题,导出了联系油压、油的粘度以及轴承几何尺寸的微分方程——雷诺方程,奠定了流体动力润滑理论的基础。一维流动的雷诺方程为: dp/dx==6μU(h-h_0)/h~3 (1)式中:h及dp/dx为任一截面处的膜厚和沿流动方向的压力梯度;U——轴颈处的线速度;h_0——压力最大处的膜厚;μ——油的动力粘度。
Elastohydrodynamic lubrication (EFT), like boundary lubrication and hydrodynamic lubrication, has developed into a recognized state of lubrication, and its theory has been continuously enriched and developed. At the same time, it has also made remarkable achievements in practical applications effect. As a general theory, its value is not limited to analyzing the movement of mechanical parts. In many other fields, such as the slippery of tires on wet roads, the movement of artificial joints, and many other phenomena of life The Theory of Elastomanics. Therefore, some authoritative scholars in the international community think that the establishment of the Elastohydrodynamics theory is the most important progress in the modern lubrication theory since the establishment of the classical Reynolds equation. I. Introduction to fluid lubrication theory In 1886, Reynolds thoroughly studied the lubrication of sliding bearings and derived the differential equation - Reynolds equation which relates the viscosity of oil and oil as well as the geometric dimension of the bearing, which laid the foundation of fluid dynamic lubrication theory. The Reynolds equation for one-dimensional flow is: dp / dx == 6μU (h-h_0) / h~3 (1) where h and dp / dx are the film thickness at any section and the pressure gradient in the flow direction; U - the linear velocity at the journal; h_0 - the film thickness at the maximum pressure; μ - the kinematic viscosity of the oil.