考虑软三体接触的粗糙界面混合润滑模型研究

doi:10.3901/JME.2018.21.113

机械工程学报 ›› 2018, Vol. 54 ›› Issue (21): 113-119.doi: 10.3901/JME.2018.21.113

考虑软三体接触的粗糙界面混合润滑模型研究

王超¹, 孔俊超², 王伟¹

1. 合肥工业大学机械工程学院合肥 230009;
2. 巢湖学院机械与电子工程学院合肥 238000

收稿日期:2017-11-17 修回日期:2018-05-02 出版日期:2018-11-05 发布日期:2018-11-05
通讯作者: 王伟(通信作者),男,1976年出生,博士,教授,博士研究生导师。主要研究方向为制造界面科学、机电装备技术。E-mail:wangwe@gmail.com
作者简介:王超,男,1993年出生。主要研究方向为先进制造界面与技术。E-mail:wangch802@126.com
基金资助:
国家自然科学基金资助项目（51475135，11472096）。

Research on Soft Three-body Contact of Rough Interface Mixed Lubrication Model

WANG Chao¹, KONG Junchao², WANG Wei¹

1. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009;
2. School of Mechanical and Electronic Engineering, Chaohu College, Hefei 238000

Received:2017-11-17 Revised:2018-05-02 Online:2018-11-05 Published:2018-11-05

摘要/Abstract

摘要： 软三体颗粒润滑是利用大量松散的固体软颗粒在界面中的承载和剪切行为实现特殊环境下界面的减摩，因此研究软颗粒介质摩擦界面在剪切过程中的受力情况，对软三体颗粒润滑机理的分析以及润滑装置的设计都具有重要意义。研究中将第三体颗粒类比为流体，基于雷诺方程、黏度方程、Greenwood和Williamson接触模型（G-W模型）等建立了含大颗粒粗糙界面的混合润滑模型。该模型中摩擦副的总载荷及总摩擦力由流体、微凸体和大颗粒三部分共同构成。通过采用有限差分法对上述物理模型进行求解分析，探究膜厚比、第三体大颗粒的质量浓度、粒径以及试件的表面形貌、弹性模量对三体接触界面的承载和摩擦力的影响情况，进而分析大颗粒粒径和接触表面粗糙度耦合时软三体接触界面的力学性能。基于对所构建的软三体接触界面混合润滑模型的研究可知：合理选择大颗粒质量浓度、粒径以及试件的表面形貌、弹性模量有助于提高承载、减小摩擦力，使得软三体颗粒流具有更好的减摩润滑性能。

关键词: 承载, 混合润滑模型, 摩擦, 三体界面, 数值模拟

Abstract: Soft three-body particle lubrication is the use of a large number of loose solid particles in the interface of the load and shear behavior to achieve low friction under special environment, so the study of the force of granular media friction interface in the shear process has great significance to the analysis of lubrication mechanism and the design of the lubrication device. In the study, the third-body granules are compared to fluid, a mixed lubrication model which contains large particles in rough interface is based on Reynolds equation, viscosity equation, Greenwood and Williamson contact model (G-W model) and so on. In this model, the total load and friction of the friction pair are composed of three parts:fluid, asperity and large granules. By using the finite difference method to solve the above physical model, the effects of the film thickness ratio, mass concentration, granular size, surface morphology and elastic modulus on the three-body contact interface of the load and friction are investigated, and the mechanical properties of the soft three-body contact interface are also analyzed by coupling the large granule size with the contact surface roughness. Based on the analysis of the mixed lubrication model, reasonable choices of large particle concentration, granular size, surface morphology of the specimen and elastic modulus helps to improve the load, reduce friction and make the soft three-body granular flow have better friction-reducing and lubrication performance.

Key words: friction, loading, mixed lubrication model, numerical simulation, three-body interface

中图分类号:

TH117

王超, 孔俊超, 王伟. 考虑软三体接触的粗糙界面混合润滑模型研究[J]. 机械工程学报, 2018, 54(21): 113-119.

WANG Chao, KONG Junchao, WANG Wei. Research on Soft Three-body Contact of Rough Interface Mixed Lubrication Model[J]. Journal of Mechanical Engineering, 2018, 54(21): 113-119.

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考虑软三体接触的粗糙界面混合润滑模型研究

Research on Soft Three-body Contact of Rough Interface Mixed Lubrication Model

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