转子振动对T型交错式迷宫密封性能影响

推进技术 ›› 2017, Vol. 38 ›› Issue (6): 1370-1378.

转子振动对T型交错式迷宫密封性能影响

贾兴运¹,徐国印²,张海¹,郑群¹

哈尔滨工程大学动力与能源工程学院，黑龙江哈尔滨 150001,海军驻哈尔滨七〇三所军事代表室，黑龙江哈尔滨 150001,哈尔滨工程大学动力与能源工程学院，黑龙江哈尔滨 150001,哈尔滨工程大学动力与能源工程学院，黑龙江哈尔滨 150001

发布日期:2021-08-15
作者简介:贾兴运，男，硕士生，研究领域为燃气轮机流体密封和流固耦合。
基金资助:
中国博士后科学基金资助项目(2015M571394)。

Effects of Rotor Vibration on T Type Labyrinth Seal Performance

College of Power and Energy Engineering，Harbin Engineering University，Harbin 150001，China,Navy in Harbin 703 Military Representative Office，Harbin 150001，China,College of Power and Energy Engineering，Harbin Engineering University，Harbin 150001，China and College of Power and Energy Engineering，Harbin Engineering University，Harbin 150001，China

Published:2021-08-15

摘要/Abstract

摘要： 为了改善传统交错式迷宫密封容易产生气流激振并导致转子失稳，对密封结构进行改造，提出了一种可以平衡气流激振力的T型交错式迷宫密封。考虑转子振动，三种转速(18，24与30kr/min)以及三种压差(0.2，0.3与0.4MPa)，对直通式、交错式迷宫密封以及T型交错式迷宫密封进行数值计算。结果表明，在相同齿顶间隙的条件下，交错式迷宫密封的泄漏量较T型交错式迷宫密封减小约8% 较直通式迷宫密封减小约32%。通过对比三种密封流场所产生的气体作用力之间的差异，得出T型交错式迷宫密封的优势在于扩大了Lomakin效应，增强了交错式迷宫密封的稳定性，同时实现了高封严效率与较高稳定性。

关键词: T型交错式迷宫密封；转子振动；泄漏；气体作用力

Abstract: To improve the performance of the interlaced labyrinth seal，which easily causes gas excitation and rotor stability loss，a new type of labyrinth seal named T type labyrinth seal is redesigned for balancing the exciting force on rotor. Under rotor vibration，straight-through，conventional interlaced，and T type interlaced labyrinth seal were compared and analyzed under three rotor speed(18，24 and 30kr/min) and pressure differences (0.2，0.3，and 0.4MPa). With same tip clearance，leakage of interlaced labyrinth seal is approximately 8% less than that of the T type labyrinth seal，which is approximately 32% less than straight-through labyrinth seal. By comparing the aerodynamic forces，the advantage of the T type labyrinth seal is to enlarge the Lomakin effect，improving the stability of conventional interlaced labyrinth seal，and excellent seal efficacy and higher stability can be achieved synchronously in T type labyrinth seal.

Key words: T type labyrinth seal；Rotor vibration；Leakage；Aerodynamic force

贾兴运,徐国印,张海,郑群. 转子振动对T型交错式迷宫密封性能影响[J]. 推进技术, 2017, 38(6): 1370-1378.

JIA Xing-yun¹,XU Guo-yin²,ZHANG Hai¹,ZHENG Qun¹. Effects of Rotor Vibration on T Type Labyrinth Seal Performance[J]. Journal of Propulsion Technology, 2017, 38(6): 1370-1378.

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[16] 张海, 郑群. 一种可消除转子激振力的T型交错式迷宫密封[P]. 中国专利:201410075465.3, 2014-10-7.　　　　　　　　　　　　　*　收稿日期:2016-02-26；修订日期:2016-04-07。基金项目:中国博士后科学基金资助项目(2015M571394)。作者简介:贾兴运,男,硕士生,研究领域为燃气轮机流体密封和流固耦合。E-mail: jiaxingyun92@126.com(编辑:张荣莉)