不同背压下蜂窝密封泄漏性能实验研究  

Experimental Study on Leakage Performance of Honeycomb Seals with Considering Different Back Pressures

作　　者：周庆辉 张万福[1] 顾承璟 潘渤 ZHOU Qing-hui;ZHANG Wan-fu;GU Cheng-jing;PAN Bo(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai,China,200093;Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an,China,710054)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]西安热工研究院有限公司,陕西西安710054

出　　处：《热能动力工程》2023年第1期57-62,81,共7页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51875361);上海市自然科学基金(20ZR1439200)。

摘　　要：蜂窝密封是减小透平机械工质泄漏的重要部件,本文设计并搭建了蜂窝密封泄漏实验装置,采用实验与理论相结合的方法,研究了背压阀门开度λ、转速及进口压力对蜂窝密封泄漏量的影响。结果表明:实验结果与理论计算吻合较好,相对误差在6%以内;在同一背压阀门开度下,密封泄漏量随着进口压力增大而增加,随着转速升高密封泄漏量几乎保持恒定;在进口压力和转速不变情况下,密封泄漏量随着背压阀门开度的增大而增加,当背压阀门开度λ=1时泄漏量达到峰值;与背压阀门开度λ=1相比较,当背压阀门开度λ=0时密封泄漏量最高可降低约15.9%。Honeycomb seal is an important component to reduce the leakage of working fluid of turbine machinery. This paper designs and builds a honeycomb seal leakage experimental device, and uses a combination of experimental and theoretical methods to study the effects of back pressure valve opening λ,rotational speed and inlet pressure on the honeycomb seals leakage. The results show that the experimental results are in desirable agreement with the theoretical calculated values, and the relative error of both is within 6%. At the same back pressure valve opening, the seal leakage increases with the increase of inlet pressure, while with the increase of speed, the seal leakage remains almost constant. Under the condition of invariable inlet pressure and rotational speed, the seal leakage increases with the increase of back pressure valve opening, and the leakage reaches the peak value when the back pressure valve opening is 1. Compared to the back pressure valve opening of 1,when it is 0,the seal leakage can be reduced by up to approximately 15.9%.

关 键 词：蜂窝密封 泄漏量 背压 进口压力 

分 类 号：TK730.2[交通运输工程—轮机工程]