考虑支点偏置的多孔质可倾瓦轴承静态特性分析  

Static Characterization of Porous Tilting Pad Bearing Considering Pivot Offset

作　　者：许世成 刘佳宝 谢绍樟 郭雪妍 夏鹏 XU Shicheng;LIU Jiabao;XIE Shaozhang;GUO Xueyan;XIA Peng(School of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin Heilongjiang 150040,China)

机构地区：[1]东北林业大学机电工程学院,黑龙江哈尔滨150040

出　　处：《润滑与密封》2024年第6期177-184,共8页Lubrication Engineering

基　　金：国家自然科学基金项目(11572098);中央高校基本科研业务费专项基金项目(2572021BF06)。

摘　　要：为探究瓦块支点偏置对多孔质可倾瓦轴承静态性能的影响,建立多孔质可倾瓦轴承的热混合润滑模型,应用Fluent软件分析轴承静态特性;采用网格迭代算法和瓦块运动UDF对轴承各瓦块沿枢轴运动及摆动进行模拟,研究偏心率、转子转速、供气压力及枢轴支点偏置对轴承负载能力、质量泄漏量、摩擦扭矩和温升的影响。结果表明:增加轴承支点偏置可提高轴承承载力,特别是在高偏心率、高转速、低供气压力条件下,承载力提高更为明显;在偏心率和转速相同时,适当的支点偏置可显著降低轴承对气体的消耗:但支点偏置会增加摩擦力矩,使转子温度升高,应合理选择支点偏置避免温升对轴承的不利影响。研究结果为多孔质可倾瓦轴承的优化设计提供了参考。In order to investigate the effect of pad pivot offset on the static performance of porous tilting pad bearings,a thermal hybrid lubrication model of porous tilting pad bearings was proposed,and Fluent software was used to analyze the static characteristics of the bearings.The grid iteration algorithm and the pad motion UDF were used to simulate the motion and swing of each pad of the bearing along the pivot,and the effects of eccentricity,rotor speed,gas supply pressure and pivot offset on bearing load capacity,mass leakage,friction torque and temperature rise were studied.The results show that increasing the bearing pivot offset can improve the bearing load capacity,especially under conditions of high eccentricity,high speed,and low gas supply pressure,the increase in bearing load is more significant.When the eccentricity and speed are the same,appropriate pivot offset can significantly reduce the gas consumption of the bearing.However,pivot offset increases the frictional torque,causing the rotor temperature to rise.Therefore,a reasonable pivot offset should be selected to avoid the adverse effects of temperature rise on the bearings.This study provide a reference for the optimization design of porous tilting pad bearings.

关 键 词：多孔质可倾瓦轴承 静态特性 支点偏置 承载力 

分 类 号：TH133.3[机械工程—机械制造及自动化]