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目前,线接触弹流油膜厚度的计算公式在各润滑状态中是不同的,尤其在弹性一变粘度状态下有着好几种公式,它们的计算结果差别很大。本文首先提出一个表达弹流润滑状态的无量纲参数:弹流润滑状态参数t=1g g3+2/(1g g1+2)。然后提出了一个适合各润滑状态的统一的油膜厚度计算公式:h′=Ag1~n,其中A和n均为t的函数,当t>1时,换g1为g3。该式计算结果与数值计算结果一般误差值小于5～10%,与实测结果基本一致,而各原有公式均有局限性,否则在同样条件下计算的误差甚至会比求得的油膜厚度值大几倍。最后,本文还提出一张修正的润滑状态图,其中各润滑状态具有明确的物理意义和合理的边界,而且此图使用起来比较方便。
At present, the formulas for calculating the thickness of line-contact pop-up oil film are different in each lubrication state, and there are several formulas especially in the state of elastic-variable viscosity. Their calculation results vary greatly. This paper first presents a dimensionless parameter that expresses the state of EHL: EHL parameter t = 1g g3 + 2 / (1g g1 + 2). Then, a uniform thickness calculation formula for each lubrication state is proposed: h ’= Ag1 ~ n, where A and n are both functions of t, and when g1> g1, g1 is replaced by g1. The results of the formula and the numerical results of the general error is less than 5 ~ 10%, and the measured results are basically the same, and the original formula has limitations, or calculated under the same conditions even worse than the calculated film thickness value Several times Finally, this paper also proposed a revised lubrication state diagram, in which the lubrication state has a clear physical meaning and reasonable boundaries, and this figure is more convenient to use.