轴线倾斜条件下核电站推力轴承润滑特性分析  

Analysis of Lubrication Characteristics of Thrust Bearings with Inclined Axis in Nuclear Power Plant

作　　者：徐熙 潘伟龙 谢江红[1] 何少华 范雪晴 蔡亮[2] Xu Xi;Pan Weiong;Xie Jianghong;He Shaohua;Fan Xueqing;Cai Liang(Jiangsu Nuclear Power Co.,Ltd.,Lianyungang 222042,China;School of Energy and Environment,Southeast University,Nanjing 210046,China)

机构地区：[1]江苏核电有限公司,连云港222042 [2]东南大学能源与环境学院,南京210046

出　　处：《核安全》2024年第1期48-55,共8页Nuclear Safety

摘　　要：作为核主泵承担轴向负载的关键部件,推力轴承的润滑性能关系到核电站的安全生产。由于制造、安装等因素,推力轴承在实际工作时可能发生轴线倾斜,影响油膜温度差场和压力场分布。本文选用油作为润滑剂,建立推力轴承间隙内的油膜三维物理模型,利用FLUENT软件开展数值计算,对倾斜界面推力轴承间隙油膜的温度、压力进行数值模拟。结果表明,轴线倾斜造成膜厚分布不均,轴向上速度梯度发生改变,造成油膜温度、压力的变化。当倾斜程度从0°变化至0.02°时,推力轴承最高温度、压力的变化幅度为100%~155%和100%~155%,轴承油膜最高温度处的动力黏度为平行时的82.79%。研究结果对推力轴承在工程实际中的设计与使用具有一定的参考价值。As a key component of the nuclear main pump to bear the axial load,the lubrication performance of thrust bearings is related to the safety production of nuclear power plant.During actual operation,thrust bearings may experience axis tilt due to manufacturing,installation,and other factors,which can affect the distribution of oil film temperature difference and pressure field.In this paper,oil is selected as the lubricant,a three-dimensional physical model of oil film in thrust bearing clearance is established,and the temperature and pressure of oil film in thrust bearing clearance are numerically simulated by using FLUENT software.The results indicate that the tilt of the axis causes uneven distribution of film thickness,changes in velocity gradient along the axis,and changes in oil film temperature and pressure.When the inclination degree changes from 0°to 0.02°,the maximum temperature and pressure changes of the thrust bearing are 100%-155%and 100%-155%,and the dynamic viscosity at the highest temperature of the bearing oil film is 82.79%of that when parallel.The research results have certain reference value for the design and use of thrust bearings in engineering practice.

关 键 词：推力轴承 轴线倾斜 润滑特性 FLUENT 

分 类 号：TM623[电气工程—电力系统及自动化]