润滑油水侵对动压可倾瓦推力轴承润滑性能的影响  

Influence of Lubricating Oil-water Invasion on Lubrication Performance of Hydrodynamic Tilting Pad Thrust Bearing

作　　者：魏士杰 李思晗 李鹏哲 胡文文 刘雨薇 贾谦 WEI Shijie;LI Sihan;LI Pengzhe;HU Wenwen;LIU Yuwei;JIA Qian(Design Institute of AECC Xi’an Engine Control Co.,Ltd.,Xi’an Shaanxi 710077,China;Department of Mechanical Engineering,Xi’an Jiaotong University City College,Xi’an Shaanxi 710018,China;Engineering Research Center of Robot and Intelligent Manufacturing,Universities of Shaanxi Province,Xi’an Jiaotong University City College,Xi’an Shaanxi 710018,China)

机构地区：[1]中国航发西安动力控制科技有限公司设计研究所,陕西西安710077 [2]西安交通大学城市学院机械工程系,陕西西安710018 [3]西安交通大学城市学院,机器人与智能制造陕西省高校工程研究中心,陕西西安710018

出　　处：《润滑与密封》2022年第9期160-165,共6页Lubrication Engineering

基　　金：西安交通大学城市学院校级项目(2020Y12)。

摘　　要：针对核主泵、船用轴系等特定工况下推力轴承润滑油的进水问题,以46润滑油和68润滑油为例研究润滑油水侵对推力轴承润滑性能的影响。通过黏度测试获得润滑油中水分质量分数为0、0.5%、1.0%时的运动黏度,采用黏温曲线对润滑油含水前后的动力黏度进行表征。将润滑油的黏温关系代入推力轴承的润滑计算当中,获得不同含水量下轴承的最小油膜厚度、温升、流量及功耗等静态特性参数,并分析含水量对推力轴承起飞转速的影响。研究结果表明:润滑油含水后对最小油膜厚度和功耗影响较大,对温升和流量影响较小;随着润滑油含水量的增加最小油膜厚度和功耗均降低,而温升增大,流量减小;使用2种润滑油在不含水和水分质量分数为0.5%时的起飞转速都在50 r/min以下,水分质量分数为1.0%时起飞转速都在50 r/min以上,表明随着含水量的增加起飞转速增大。Aimed at the water inlet problem of thrust bearing lubricating oil under specific working conditions such as nuclear main pump and marine shafting,the influence of water invasion of lubricating oil on the lubrication performance of thrust bearing was studied with 46 lubricating oil and 68 lubricating oil as examples.The kinematic viscosity of lubricating oil with water mass fraction of 0,0.5%and 1.0%was obtained by viscosity test.The dynamic viscosity of lubricating oil before and after water content was characterized by viscosity-temperature curves.The viscosity-temperature relationship of lubricating oil was substituted into the lubrication calculation of thrust bearing.The minimum oil film thickness,temperature rise,flow and power consumption of the bearing under different water content were obtained,and the influence of water content on the takeoff speed of thrust bearing was analyzed.The results show that the water content of lubricating oil has a great influence on minimum oil film thickness and power consumption,and has little influence on temperature rise and flow.With the increase of water content,the minimum oil film thickness and power consumption decrease,the temperature rise increases and the flow decreases.The take-off speeds of the two lubricating oils are both below 50 r/min without water and with mass fraction of 0.5%water,and above 50 r/min with mass fraction of 1.0%water,which indicates that the take-off speed increases with the increase of water content.

关 键 词：推力轴承 润滑性能 静态特性 润滑油 起飞转速 

分 类 号：TH117.2[机械工程—机械设计及理论]