粗糙表面湍流润滑的随机模型  

Stochastic Models for Turbulent Lubrication of Rough Surfaces

作　　者：朱少禹 孙军 李彪 张潇 苗恩铭[3] 任燕平 朱桂香 ZHU Shaoyu;SUN Jun;LI Biao;ZHANG Xiao;MIAO Enming;REN Yanping;ZHU Guixiang(School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009;School of Mechanical Engineering,Hefei University of Technology,Hefei 230009;School of Instrument Science and Optoelectronic Engineering,Hefei University of Technology,Hefei 230009;Weichai Power Company Limited,Weifang 261001)

机构地区：[1]合肥工业大学汽车与交通工程学院,合肥230009 [2]合肥工业大学机械工程学院,合肥230009 [3]合肥工业大学仪器科学与光电工程学院,合肥230009 [4]潍柴动力股份有限公司,潍坊261001

出　　处：《机械工程学报》2019年第9期71-79,共9页Journal of Mechanical Engineering

基　　金：内燃机可靠性国家重点实验室开放基金资助项目(skler-201708);国家自然科学基金资助项目(51490660/51490661)

摘　　要：目前粗糙表面的湍流润滑分析一般都采用各向同性粗糙表面的湍流润滑模型,但是该模型的适用范围过于狭窄,不适合用于处理具有方向性特征的粗糙表面湍流润滑问题。基于Christensen的随机层流润滑理论和零方程形式的滑动轴承湍流润滑理论,推导提出了适用于粗糙表面径向滑动轴承湍流润滑分析的随机湍流润滑理论模型。该理论模型包含三部分:一维纵向粗糙表面径向滑动轴承的随机湍流润滑理论模型、一维横向粗糙表面径向滑动轴承的随机湍流润滑理论模型和各向同性粗糙表面径向滑动轴承的随机湍流润滑理论模型。应用提出的随机湍流润滑模型对均匀各向同性粗糙表面径向滑动轴承湍流润滑进行了分析,结果与相应的试验数据一致性良好。提出的随机湍流润滑理论模型可以方便地用于具有方向性特征的粗糙表面湍流润滑分析。此外,提出的随机湍流润滑理论模型不仅适用于径向滑动轴承,而且也适用于滑块和推力轴承等摩擦副机械零件的湍流润滑研究。Current turbulent lubrication analysis of rough bearing surfaces generally uses a turbulent lubrication model of an isotropic rough bearing surface.However,the scope of the model is too narrow and is not suitable for solving turbulent lubrication problems on rough bearing surfaces with directional characteristics.Based on the stochastic laminar lubrication theory of Christensen and the turbulent lubrication theory in the form of zero equation for journal bearings,stochastic turbulent lubrication theoretical models suitable for turbulent lubrication analysis of rough surface journal bearings are derived.The theoretical models consist of three parts:Stochastic turbulent lubrication theory model for one-dimensional longitudinal rough surface journal bearing,stochastic turbulent lubrication theory model for one-dimensional transverse rough surface journal bearing and stochastic turbulent lubrication model for isotropic rough surface journal bearing.The turbulent lubrication of the isotropic rough surface journal bearing is analyzed by the proposed stochastic turbulent lubrication model.And good agreement is obtained between the theoretical results and the corresponding experimental data.The proposed stochastic turbulent lubrication theoretical model can be conveniently applied to turbulent lubrication analysis of rough bearing surfaces with directional characteristics.Moreover,the theoretical models of stochastic turbulent lubrication are not only suitable for journal bearings,but also for turbulent lubrication research of friction pairs,such as sliders and thrust bearings.

关 键 词：流体动力润滑 湍流流动 粗糙表面 随机理论 

分 类 号：TH117[机械工程—机械设计及理论]