摘要
滑动轴承的相关研究很多都基于等黏度的情况下,这与轴承的实际工作情况有较大的出入。使用计算流体力学FLUENT通过编写的黏温方程UDF程序进行动压滑动轴承润滑油黏度的计算,并考虑黏温效应对动压滑动轴承性能的影响,比较等黏度与变黏度情况下动压滑动轴承的油膜压力与承载力、油膜的轴向与周向温度分布。结果表明:在考虑黏温效应条件下,轴承的承载力、油膜压力、摩擦力均小于定黏度条件下,这是由于温度升高导致黏度降低,从而减小了油膜静压力和承载力;在轴承轴向方向上,从油膜中心位置向两端部,油膜温度逐渐升高;在轴承圆周方向上,从收敛区到发散区,油膜温度先升高后降低,油膜温度峰值出现在轴承发散区的端部位置。
Many related researches on journal bearings are based on the case of constant viscosity,which is quite different from the actual work of journal bearings.Computational fluid dynamics(CFD) FLUENT was used to calculate the viscosity of lubricating oil of hybrid bearing by UDF program of viscosity-temperature equation,and the effects of viscosity-temperature effect on the performance of hybrid bearing were analyzed.The oil film pressure and bearing capacity,the axial and circumferential temperature distribution of the oil film were compared under the conditions of constant viscosity and variable viscosity.The results show that under the condition of considering the viscosity-temperature effect,the bearing capacity,oil film pressure and friction are less than those under the constant viscosity condition.This is because that the decrease of viscosity due to temperature increase causes the decrease of static pressure and bearing capacity of oil film.In the axial direction of the bearing,the temperature of the oil film is increased gradually from the center of the oil film to the two ends.In the circumferential direction of the bearing,the oil film temperature is increased first and then decreased from the convergence area to the divergence area,and the peak value of the oil film temperature appears at the end of the divergence area of the bearing.
作者
王丽丽
袁国腾
耿欢
梁鹏
WANG Lili;YUAN Guoteng;GENG Huan;LIANG Peng(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Shandong Qingdao 266590,China;School of Mechanical&Automotive Engineering,Qingdao University of Technology,Qingdao Shandong 266520,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2020年第1期54-58,共5页
Lubrication Engineering
基金
中国博士后科学基金项目(2017M612304)
山东省博士后创新项目专项资金项目(201701016)
山东科技大学杰出青年科技人才支持计划项目(2015JQJH104)
青岛市博士后研究人员应用研究项目
山东省重点研发计划项目(2018GSF117038)
关键词
动压滑动轴承
黏温效应
承载力
油膜温度
摩擦因数
hybrid-bearing
viscosity-temperature effect
bearing capacity
oil film temperature
friction coefficient
