摘要
建立无限长滚子与平面的线接触等温弹流脂润滑模型,采用多重网格法研究纯滚工况下载荷和卷吸速度对润滑油膜特性的影响;采用多功能双色光弹流润滑油膜测量实验台,在相应工况下进行变载荷和变速度实验研究。数值模拟结果表明,较大的载荷可以获得更大的压力和更小的膜厚,较大的速度则主要提升了二次压力峰并增大了膜厚。实验结果表明:随着载荷的增大,整体膜厚、最小膜厚和中心膜厚均先增大后减小,但载荷较小时出现了最小膜厚和中心膜厚实验值和理论模拟值不一致的变化趋势,这可能是数值模拟分析时稳态假设与实际润滑脂流变特性、时变特性及润滑机制不符造成的;随着速度的增大整体膜厚、最小膜厚和中心膜厚都线性增大,且实验值与理论模拟值有较高的一致性。
The isothermal grease elastohydrodynamic lubrication model of linear contact between infinite roller and plane was established,and the influence of load and entrainment speed on the lubrication film characteristics was studied by using multi-grid method under pure rolling condition.The variable load and velocity experiments were carried out on a multi-functional two-color photo elastohydrodynamic lubrication oil film measuring test bench under corresponding working conditions.The numerical simulation results show that larger load will lead to greater pressure and smaller film thickness,while larger speed mainly advances the secondary pressure peak and increases film thickness.The experimental results show that with the increase of load,the overall film thickness,the minimum film thickness and central film thickness are increased first and then decreased,however,the theoretical simulation values of minimum film thickness and central film thickness are inconsistent with the experimental values when the load is small.This may be caused by the inconsistency of steady-state hypothesis of numerical simulation analysis and the actual rheological properties,time-varying characteristics and lubrication mechanism of grease.With the increase of velocity,the overall film thickness,minimum film thickness and central film thickness are increased linearly,and the experimental values are in good agreement with the theoretical simulation values.
作者
杨福芹
姜敬伟
孙丽
刘欣
YANG Fuqin;JIANG Jingwei;SUN Li;LIU Xin(School of Mechanoelectrical Engineering,Qingdao University of Science and Technology,Qingdao Shandong 266061,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2020年第7期28-35,共8页
Lubrication Engineering
基金
山东省重点研发计划项目(2018GGX103015).
关键词
线接触
弹流脂润滑
多重网格法
油膜测量
line contact
grease elastohydrodynamic lubrication
multi-grid method
oil film measurement
