水润滑动静压滑动轴承的临界温度研究  

Study on Critical Temperature of Water-lubricated Hybrid Journal Bearings

作　　者：张同钢[1] 王优强[1] 王立梅[1] 徐彩红[1] 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266033

出　　处：《润滑与密封》2017年第10期62-69,共8页Lubrication Engineering

基　　金：国家自然科学基金项目(51575289);山东省自然科学基金培养基金项目(2016ZRB01AJX)

摘　　要：建立水润滑动静压滑动轴承的弹流润滑几何模型,采用考虑热效应的Reynolds方程,对水润滑动静压滑动轴承进行弹流理论分析,计算一定供水压力下当润滑剂局部最高温度达到临界值时不同的速度、载荷极限值;分析润滑介质、轴瓦材料以及供水压力变化对速度、载荷达到极限值时的临界温度曲线的影响,得到润滑剂局部最高温度达到临界温度时的轴承速度和载荷极限值的临界温度曲线,并通过拟合得到曲线的函数表达式。研究结果显示:海水润滑下的临界温度曲线高于纯水润滑,塑料轴瓦的临界温度曲线高于陶瓷轴瓦;供水压力对不同轴瓦材料的临界温度曲线变化趋势影响不同,对不同润滑介质的临界温度曲线的变化范围影响不同。The elastohydrodynamic lubrication geometric model of water-lubricated hybrid journal bearings was established.The numerical simulation of the hearings was carried out by using the Reynolds equation with thermal effect.The different limit values of velocity and load when the local maximum temperature of the lubricant reaches a critical value were calculated.The influence of the different types of lubricants, bearing materials and water supply pressure on the critical temperature curves which show the limit values of velocity and load was analyzed.The critical temperature curves of velocity versus load and their fitting function were obtained when the local maximum temperature of the lubricants reaches the critical temperature.The results show that the critical temperature curve of sea-water lubricant is higher than that of pure-water lubricant, and the critical temperature curve of plastic bearing is higher than that of ceramic bearing.The influences of water supply pressure on the trend of critical temperature curve of different bearing materials, as well as the range of critical temperature curve of different lubricants are different.

关 键 词：水润滑 动静压轴承 弹流润滑 临界温度 

分 类 号：TH117.2[机械工程—机械设计及理论]