空气预热器U型接触式柔性密封结构的实验研究  

Experimental study of a U-type contact flexible seal in an air preheater

作　　者：骆青业[1] 何立东[1] 王庆峰[1] 

机构地区：[1]北京化工大学诊断与自愈工程研究中心,北京100029

出　　处：《北京化工大学学报（自然科学版）》2011年第3期108-112,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家"863"计划(2007AA04Z422);中央高校基本科研业务费专项资金(ZZ0905);广东省教育部科技部企业科技特派员行动计划专项项目(2009B090600031)

摘　　要：为了解决电站锅炉空气预热器传统非接触式密封漏风率过高的问题,本文提出了一种新型的接触式柔性密封。通过实验的方法比较了V型和U型密封试件,结果表明U型密封结构更适合于空气预热器。对U型密封试件的7个结构参数的分析表明,随着波数、波深和总长的增加,密封性能增强;随着厚度的减小,密封性能增强;波距、初始长度和迎角不影响密封性能。To solve the problems associated with the conventional non-contact seal used in air preheaters for power boilers,a new contact flexible seal is proposed.Experimental studies of the factors affecting the performance of the contact flexible seal,including a comparison of V-type and U-type seal specimens,and analysis of seven structural parameters of U-type seal specimens are reported.The results showed that a U-type seal is more suitable for use in an air preheater.For U-type seal specimens the seal performance is enhanced by increasing the wave number,wave depth and total length and by decreasing the wave thickness;the wave interval,initial length or head-on angle have no effect on the performance of the seal.

关 键 词：空气预热器 接触式柔性密封 波型 结构参数 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]