微凹槽织构化粗糙表面热流体动力润滑确定性模型及减摩机理研究

项目名称： 微凹槽织构化粗糙表面热流体动力润滑确定性模型及减摩机理研究

项目编号： No.51305168

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： 纪敬虎

作者单位： 江苏大学

项目金额： 25万元

中文摘要： 表面织构化能显著提高表面的摩擦学性能，受到国内外学者和工程技术人员的广泛关注，成为当前摩擦学领域的热点课题。本项目综合考虑粗糙度和热效应的因素，建立微凹槽织构化粗糙表面热流体动力润滑确定性模型，联立广义Reynolds方程、润滑油膜膜厚方程、三维能量方程、三维热传导方程以及载荷平衡方程，利用多重网格法计算润滑油膜压力和温度分布曲线图，研究正弦模型粗糙峰条件下微凹槽的几何参数、截面形状、线形及局部织构对油膜承载能力、摩擦系数和温度的影响规律。然后，采用面-面接触式摩擦副对微凹槽织构化试样进行摩擦学特性试验研究，通过对试验与理论研究结果的对比分析，进一步完善数学模型。本研究旨在揭示微凹槽织构的润滑减摩机理，为表面织构的摩擦学优化设计及其工程应用提供理论支持。

中文关键词： 微凹槽；表面粗糙度；热流体动力润滑；摩擦学性能；确定性模型

英文摘要： Surface texturing has attracted most attentions from scholars and engineers at home and abroad and become key problems in the field of tribology because it can significant improve the tribological performance of surfaces. In this project, the thermohydrodynamic lubrication deterministic model of textured rough surfaces with micro-grooves will be established by considering surface roughness and thermal effects. The simultaneous solution of the generalized Reynolds equation, oil film thickness equation, three-dimensional energy equation, three-dimensional heat transfer equation and force equilibrium equation will be presented by the multi-grid algorithm. Consequently, the three-dimensional pressure and temperature distribution maps of sinusoidal model asperities will be obtained to investigate on the effect of geometrical parameters, cross-section, line shapes, and partial surface texturing of micro-grooves on load carrying capacity, friction coefficient and temperature. Then, in order to investigate the tribological performance of textured surfaces with micro-grooves, the friction coefficients of tribo-pairs will be measured on face to face contact friction pairs. After that, the deterministic models will be improved by analyzing and comparing the experimental and theoretical results. The project aims to reveal t

英文关键词： micro-groove；surface roughness；thermohydrodynamic lubrication；tribological performance；deterministic model