文献类型：期刊文献

中文题名：三种迷宫密封泄漏量及动特性系数数值研究

英文题名：Numerical Study on Leakage and Dynamic Coefficients of Three Types of Labyrinth Seals

作者：徐文杰[1];王建文[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2017

卷号：42

期号：3

起止页码：96

中文期刊名：润滑与密封

外文期刊名：Lubrication Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

语种：中文

中文关键词：迷宫密封;计算流体动力学;泄漏量;动特性系数

外文关键词：labyrinth seal ; computational fluid dynamics （CFD） ; leakage; dynamic coefficients

摘要：对直通型、阶梯型及交错型3种迷宫密封流场进行数值分析,研究其封严特性及动力学特性,分析进出口压差、转子转速对迷宫密封泄漏量及动力学特性系数的影响。研究结果表明:交错型迷宫密封封严特性最优,直通型最差;直通型迷宫密封在高转速时有较好的动力学特性,而交错型迷宫密封在低转速时动力学特性很好,但随转速的增加动力学性能急剧下降;在进出口压差较大或转速较低时,交错型迷宫密封具有良好的密封性能及动力学特性,阶梯型迷宫密封动力学特性最差;在转速较高时,直通型迷宫密封具有良好的动力学特性,交错型迷宫密封动力学特性最差。
Numerical method was used for simulating the flow fields and studying the sealing performance and dynamic characteristics of straight-through, stepped and staggered labyrinth seals.The effects of rotor speed and pressure on leakage and dynamic characteristics were investigated.The results indicate that staggered labyrinth seal has the best sealing performance among three kinds of seals ,while the straight-through type has the worst sealing performance.Straight-through labyrinth seal has better dynamic characteristics at high speed, while the staggered type has better dynamic characteristics at low speed, but its dynamic performance falls sharply with the increasing of rotor speed.At low rotor speed or high pressure difference, staggered labyrinth seal has better sealing performance and dynamic characteristics, while the stepped type has the worst sealing performance and dynamic characteristics.At high speed, straight-through labyrinth seal has better dynamic characteristics ,while the staggered type has the worst dynamic characteristics.