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基于弹流润滑模型的润滑油黏度确定方法
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国家自然科学基金项目(51675046;U1637205).


Method for Determining Lubricant Viscosity Based on Elastohydrodynamic Lubrication Theory
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    摘要:

    以弹性流体动力润滑理论为基础,通过建立润滑分析模型计算润滑油黏度,提出一套科学合理又便于实际应用的润滑油黏度选油的确定方法。首先基于不同温度下的高/低剪切率流变实验,提出综合考虑温度、剪切速率影响的润滑油黏度计算公式;然后建立粗糙表面热弹流润滑分析模型,并通过光弹流膜厚测量实验和摩擦因数实验验证模型的合理性;最后以膜厚比为判据,以润滑分析计算为基础,确定了摩擦副形成有效润滑油膜所需的润滑油黏度。该方法以润滑理论计算为依据,综合考虑温度、压力、剪切速率的影响,对典型零部件的润滑设计中的润滑油选取具有指导意义。

    Abstract:

    Based on the theory of elastohydrodynamic lubrication,by establishing the lubrication analysis model to calculate the viscosity of lubricating oil,a method for determining the lubricant viscosity was put forward,which is scientific and reasonable and convenient for practical application.Firstly,Based on the rheological experiments under different temperatures and wide range of shear rate,a curvefitting formula for calculating the viscosity of lubricating oil with the influence of temperature and shear rate was first presented.A thermo elastohydrodynamic lubrication (EHL) model was then established for the rough surface in point contact,and the model was verified by optical EHL thickness measurement and the experiment of friction coefficient.The lubricant viscosity was finally determined based on lubrication simulation and film thickness over roughness ratio.This method is based on the theoretical simulation of lubrication considering the influence of temperature,pressure and shear rate,and hence has guiding significance for the optimizing selection of lubricant in the lubrication design of typical parts.

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刘俊明.基于弹流润滑模型的润滑油黏度确定方法[J].润滑与密封,2018,43(7):7-12.
. Method for Determining Lubricant Viscosity Based on Elastohydrodynamic Lubrication Theory[J]. Lubrication Engineering,2018,43(7):7-12.

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  • 在线发布日期: 2018-07-31
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