基于CFD偏置迷宫密封泄漏特性研究  

Study on Leakage Characteristics of Eccentric Labyrinth Seal Based on CFD Tools

作　　者：宋占宽 曾永忠 刘小兵[1,2] 余志顺 邱胜[1] SONG Zhankuan;ZENG Yongzhong;LIU Xiaobing;YU Zhishun;QIU Sheng(School of Energy and Power Engineering,Xihua University,Chengdu Sichuan 610039,China;Key Laboratory of Fluid and Power Machinery of Ministry of Education,Xihua University,Chengdu Sichuan 610039,China)

机构地区：[1]西华大学能源与动力工程学院,四川成都610039 [2]西华大学流体及动力机械教育部重点实验室,四川成都610039

出　　处：《机床与液压》2018年第21期150-153,179,共5页Machine Tool & Hydraulics

基　　金：国家自然科学基金资助项目(51279172);西华大学省部级学科平台开放课题(szjj2016-004);流体及动力机械四川省科研创新研究团队(x1404)

摘　　要：为了探究偏置状态迷宫密封的泄漏特性,使用ICEM CFD软件对迷宫密封水体模型进行结构化网格划分,并选择标准k-ε湍流模型,以不可压缩流体为工作介质对不同偏心率的迷宫密封进行了数值模拟计算,分析了不同间隙和压比对偏置迷宫密封泄漏特性的影响。结果表明:迷宫密封在偏心率不变的情况下,密封泄漏量随着节流间隙的增大而增加;密封泄漏量随着压比的增大而增加,且在高压比工况下,泄漏量随偏心率的变化更加明显。In order to explore the leakage characteristics of the labyrinth seal in an off-center position, ICEM Computational Fluid Dynamics （CFD） software was used. Three dimensional （3D） model of labyrinth seal was divided into structured mesh, and the standard k-ε turbulence model was selected to numercially simulate the labyrinth of different eccentricity with incompressible fluid as the working medium. The influence of different gap and pressure ratio on the leakage characteristics of eccentric labyrinth seal was analyzed. The results show that the leakage of the seal increases with the increase of the gap width when the eccentricity is invariable. Similarly, the leakage of the seal increases with the increase of the pressure ratio increase,and in the high pressure ratio of operating conditions, the leakage with the eccentricity of the change is more obvious.

关 键 词：迷宫密封 偏心率 间隙 压比 泄漏量 

分 类 号：TH136[机械工程—机械制造及自动化]