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五、弹性流体动力润滑理论概要如前所述,弹流理论是研究重载接触中流体动压、弹性变形和压粘关系这三者的综合效应。所以,弹流理论的主要命题是研究油膜形状、压力分布、表面摩擦力、表面温度以及油膜温度等。在通常情况下,最值得注意的是最小油膜厚度,因为它的大小与表面的破坏有密切联系。线接触弹流,即相应于两个圆柱体(或其中一个是平面)的接触弹流发展较早而且研究也较深入。下面着重介绍线接触弹流理论的基本特征。图4、图5及图6表示弹流接触中油膜形状和压力分布的情况。 1.油膜形状由图4a和图5可以看到下列几点: (1)油膜在入口处呈收敛形和油压升高相对应。
V. Summary of Elastohydrodynamic Lubrication Theory As mentioned above, EHF theory is to study the combined effect of hydrodynamic pressure, elastic deformation and pressure-viscous relationship in heavy-load contact. Therefore, the main proposition of the theory of the Elastohydrodynamics is to study the shape of the oil film, the pressure distribution, the surface friction, the surface temperature and the temperature of the oil film. Under normal circumstances, the most noteworthy is the minimum film thickness, because of its size and surface damage are closely linked. The line contact flow, that is, the contact flow corresponding to two cylinders (or one of them is a plane), has been developed earlier and studied more deeply. The following describes the basic characteristics of the theory of line contact EHF. Fig. 4, Fig. 5 and Fig. 6 show the shape and pressure distribution of the oil film in contact with the eruptive flow. 1. Oil film shape Figure 4a and Figure 5 can be seen the following points: (1) the oil film at the entrance was convergent and oil pressure rise corresponding.