计入薄壁构件挠度变形的线接触弹流润滑分析  

Analysis on Line Contact EHL of Thin-wall Plate Deflection

作　　者：田淋 王亚珍[1] 赵坤 童群 苏达士 宋丽 

机构地区：[1]上海大学机电工程与自动化学院,上海200072 [2]宁波慈兴轴承有限公司,浙江宁波315301

出　　处：《润滑与密封》2018年第1期45-49,共5页Lubrication Engineering

基　　金：国家"863"计划项目(2015AA043005);宁波市科技攻关项目(2014B1006);宁波市科技创新团队项目(2015B11012)

摘　　要：由于薄壁构件在受力情况下产生挠度变形,对弹流润滑有一定影响,导致原来的弹流润滑计算存在较大误差,经典的接触模型已不再适用。提出一种考虑薄壁平板挠度变形的弹流润滑线接触模型,该模型能够确切反映薄壁平板的挠度变形对弹流润滑的影响;采用有限元仿真软件建立薄壁平板的挠度变形模型,在挠度变形的基础上,分析速度参数及载荷参数对线接触弹流润滑性能的影响。研究结果表明:挠度变形对薄壁件润滑的影响十分明显,油膜压力减小,中心膜厚分布范围增大,膜厚值减小;随着速度及载荷参数发生变化,油膜压力及膜厚也相应地发生改变;当其他条件不变时,中心油膜厚度随速度的增加而增大,且中心油膜区域逐渐增加,速度参数对油膜压力影响较大,油膜压力随着速度的增加而升高,颈缩现象逐渐出现;油膜压力随着载荷的增大而升高,同时油膜厚度逐渐减小。Due to the deflection of thin-walled component under the force,it has a certain influence on the elastohydro- dynamic lubrication（EHL） ,which leads to a large error on the original calculation using the classical contact model. A kind of EHL line contact model by considering the deflection of the tablet was put forward, which couldan exactly reflect the deflection of thin-wall plate deformation on the influence of EHL.Thin-wall plate deformation model was established by finite element simulation software to analyze the effect of speed and load parameters on the performance of line contact EHL, on the basis of the deflection deformation.The results show that the deformation of the thin wall plate has an effect on the lubrication, the pressure of the oil film is decreased, and the range of the central film thickness distribution is increased but the film thickness is decreased.With the change of the speed and load, the pressure and the thickness of the oil film are changed accordingly.When other conditions is the same, the central oil film thickness is increased with the increasing of ve- locity, and the central oil film area is also increased.The velocity parameter has a great influence on the oil film pressure, the oil film pressure is increased with the increasing of velocity, and the necking phenomenon appears.The oil film pressure is increased with the increasing of the load, while the oil film thickness is decreased.

关 键 词：薄壁平板 挠度变形 线接触 弹流润滑 

分 类 号：TH133.33[机械工程—机械制造及自动化] TH117