航空发动机封严技术的进展  

Improvement of Aero-Engine Sealing Technology

作　　者：沈虹[1] 郑天慧[1] 陈玉洁[1] 

机构地区：[1]中国燃气涡轮研究院,四川成都610500

出　　处：《燃气涡轮试验与研究》2011年第4期51-55,共5页Gas Turbine Experiment and Research

摘　　要：封严技术一直是高性能航空发动机研发工作的重要组成部分,先进封严技术是满足发动机耗油率、推重比、污染物排放、耐久性及寿命期成本目标的关键技术。通过减少发动机内部气流的泄漏量,可大大提高发动机的性能和效率。本文针对航空发动机典型封严技术,详细介绍了石墨封严、篦齿封严、刷式封严的结构特点及其技术改进和发展趋势。重点阐述了德国MTU公司开发的新型刷式封严技术,其独特的结构解决了刷式封严掉毛这一技术难题。Sealing technology has always been a significant part of high-performance aero-engine development. And advanced sealing technology is the key to achieve lower SFC, higher thrust-to-weight ratio, less emission, improved endurance and less life cycle cost. The performance and efficiency of aero-engines can be greatly improved by reducing the leakage of inner flow. Focusing on the typical seal technology used in aero-engines, this paper introduces the features, technology improvement and development tendencies of graphite sealing, labyrinth sealing and brush sealing in details, particularly the new brush sealing technolo-gy developed by MTU, which solved bristle looses by its unique configuration.

关 键 词：航空发动机 封严技术 掉毛 高压刷式封严 

分 类 号：TB42[一般工业技术] V23[航空宇航科学与技术—航空宇航推进理论与工程]