磨损工况下可倾瓦轴承性能研究  

Study on performance of tilting pad journal bearings under wear condition

作　　者：李强[1] 唐心昊 张硕[1] 王玉君[1] 许伟伟[1] 王振波[1] LI Qiang;TANG Xinhao;ZHANG Shuo;WANG Yujun;XU Weiwei;WANG Zhenbo(College of New Energy in China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东青岛266580

出　　处：《中国石油大学学报（自然科学版）》2021年第5期128-135,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(51506225);山东省重点研发计划项目(2018GHY115018);中央高校基本科研业务费专项(18CX02129A);山东省自然科学基金面上项目(ZR2020ME174);中国石油大学(华东)研究生创新工程项目(YCX2019040)。

摘　　要：针对启停或外界干扰工况下发生磨损故障的转子-可倾瓦轴承系统,采用计算流体力学方法建立可倾瓦轴承三维热流体动压润滑模型。基于自编动网格程序实现润滑流场与转子、瓦块运动的耦合,对可倾瓦轴承的润滑流场进行瞬态计算;研究磨损前后轴承热流体润滑性能,分析不同磨损程度下轴承的瓦块表面压力分布、温度分布、承载力以及偏心率等性能参数。结果表明:可倾瓦轴承各瓦块均存在高压区,产生动压效应,瓦块磨损破坏了瓦块表面压力和温度的连续性,出现了局部的压力、温度降低;随着磨损深度增加,轴承承载力逐渐降低,偏心率不断增大。A three-dimensional thermo-hydrodynamic(THD)model of tilting pad journal bearings(TPJBs)was established by using the computational fluid dynamics(CFD)method,aiming at the rotor-TPJBs system with wearing failure under the condition of start-stop or external interference.The flow field was coupled with the motion of the shaft and the pads by using a self-developed dynamic grid program,and the transient calculation of lubrication flow field of TPJBs was carried out.The hydrothermal lubrication properties of TPJBs before and after wearing were studied.The pressure distribution,temperature distribution,loading capacity and eccentricity of TPJBs under different wearing depths were analyzed and compared.The results show that there is a high pressure zone in each pad of TPJBs,resulting in the hydrodynamic effect.The wearing of the pad destroys the continuity of pressure and temperature on the surface of the pad and results in the decrease of the local pressure and temperature.With the increase of the wearing depth,the loading capacity of the bearing decreases gradually,and its eccentricity increases continuously.

关 键 词：可倾瓦轴承 轴瓦磨损 热流体润滑 计算流体力学 动网格技术 

分 类 号：TH133[机械工程—机械制造及自动化]