基于弹流润滑反常摩擦现象的界面滑移机理研究

项目名称： 基于弹流润滑反常摩擦现象的界面滑移机理研究

项目编号： No.51305221

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 张建军

作者单位： 青岛理工大学

项目金额： 25万元

中文摘要： 界面滑移对微纳米尺度下流体动力学行为有重要影响，其相关研究被认为是今后力学发展的新方向之一。在高压条件下滑移产生在固液界面处还是流体内部一直存在争议，申请人所在课题组在实验中成功地观测到带有入口凹陷的弹流油膜，发现当入口凹陷出现时摩擦系数曲线偏离了经典Stribeck曲线，推测归因于界面滑移，但缺少理论分析支持。基于此本项目研究高压条件下界面滑移机理，以等效超低粘度的伪界面滑移模型代替极限剪应力流变模型，借助粘温关系建立界面连续条件，设计有效数值方法求解。结合光干涉技术和冲击封油技术测量界面滑移的发生位置，分析压力、表面能、卷吸速度等对界面滑移的影响。设计摩擦力测量系统，解决轴承转动副对摩擦力测量结果的影响，根据实验观察到的反常摩擦力变化建立新的滑移模型，揭示反常摩擦力产生机理。并对经典Stribeck曲线做补充修正，为工程实际中通过改进润滑方式来减小摩擦力提供参考。

中文关键词： 界面滑移；摩擦力测量；剪稀模型；入口凹陷；弹性流体动力润滑

英文摘要： The boundary slippage condition is crucial in the analysis of liquid flow on the micro-nano scale. The related research is considered to be one of the promising direction of the mechanical development in the near future. However, it is still unknown whether the slippage occurs at the solid-liquid interface or the fluid inside under high pressure conditions.The uplifting news is that an anomalous Elastohydrodynamic Lubrication Film(EHL) shape characteried by an inlet dimple is experimentally obtained by our team group and find that friction coefficient curve deviates from the classical Stribeck curve when taking the inlet dimple into consideration. We conjecture that some observed abnomal EHL films and friction behavious under large slidings could be tentatively related to boundary slippage. Unfortunately these proposed boundary slippage could not be confirmed because of the lack of theoretical analysis.So this project aims to study the mechanism based on the slippage phenomena of highly pressurized EHL.Equivalent ultra-low viscosity pseudo boundary slippage model instead of limit shear stress rheological model and continuous conditions is set with the aid of viscosity-temperature relationship interface.Contact beam interferometry technology with impact oil technology, a new method is expected to design in order

英文关键词： boundary slippage；friction measure；shear-thinning model；input dimple；elastohydrodynamic lubrication