面接触限量供油润滑的自集油增强功能表面调控

随着对微器件液体润滑策略的探索和精密部件少油量润滑技术的需求，限量供油润滑正引起越来越多的关注，提高表面的自集油能力是其中关键问题之一，但相关研究匮乏。为此本课题针对面接触限量供油润滑，提出构造基于图案润湿的自集油增强功能表面，实现润滑剂的定向迁移及不同面体比的润滑剂分布，提高限量供油润滑效率。主要研究内容包括：1）润滑轨道表面润滑油分布的荧光定量测量。2）表面润湿性对面接触限量供油润滑膜厚与摩擦力的影响。3）针对润滑油条状、微网状和微液滴状分布，研究自集油增强功能表面的设计与制备。4）自集油增强功能表面作用下面接触限量供油润滑的实验研究。5）面接触限量供油润滑及表面自集油效应的理论分析。本项目将初次验证“油膜润滑的自集油增强功能表面调控”概念的有效性，给出有效润滑条件下供油量与自集油增强功能表面特性参数的定量关系。研究成果为限量供油润滑提供新的理论知识，也贡献于节能和环保的社会需求。

With exploration for the proposed strategy of liquid film lubrication in miniature devices and measures of less lubricant usage in precision mechanical units, lubrication with limited lubricant supply (LLS) has attracted more and more attention. Enhancing lubricant replenishment on the lubricated surfaces is a key in the LLS lubrication, however there is knowledge vacuum in this area. Therefore this project is proposed for an idea of functional surfaces with enhanced lubricant replenishment by patterned wettability to achieve desired lubricant migration and distributions with different surface-to-volume ratios for efficient lubrication under flat-on-flat contact. The main work will include: 1) To develop a fluorescence-based measuring system for lubricant distribution on the lubrication track. 2) To investigate the influence of surface wettability on oil film thickness and friction of flat-on-flat contact with limited lubricant supply. 3) To study design principles of the functional surfaces with enhanced lubricant replenishment for lubricant distributions of stripes, meshes and droplets. 4) To experimentally study the lubrication behaviors with limited lubricant supply under functional surfaces with enhanced lubricant replenishment. 5) To build a mathematical model for theoretical analyses of thin hydrodynamic lubrication with limited lubricant supply, and thereafter to study the mechanism of the functional surfaces with enhanced lubricant replenishment. In this project the effect on oil lubrication of the functional surfaces with enhanced lubricant replenishment will be first-ever demonstrated. And in the meaning time the relationship between the lubricant quantity and the parameters of the functional surface under efficient lubrication will also be presented. The theory and the data obtained will be beneficial to the tribological design of liquid lubrication, and of course contribute to the energy saving and environmental protection.