【摘要】 动密封技术是航空发动机关键技术之一,对发动机整体性能具有重要影响。气膜密封结构是一种性能先进、潜力巨大的航空发动机密封型式。介绍了几种典型气膜密封结构的工作原理、结构特点和发展历程,分析其在航空发动机上应用中的存在的优势和问题。从理论研究、试验研究2方面综述了国内外气膜密封技术的发展现状。对航空发动机气膜密封技术的发展现状和需要关注的研究方向进行了总结,表明气膜密封是航空发动机密封技术中具有巨大发展潜力的重要方向,但已有的大部分气膜密封技术尚不能满足高性能航空发动机的技术需求,仍需要加快相关基础技术的研究与发展。更多还原

【Abstract】 Dynamic sealing technology is one of the key technologies of aeroengines,which has an important influence on the over-all performance of the engine. The file-riding gas seal is an aeroengine sealing technology with advanced performance and great potential.Firstly the working principles,structural characteristics,and development history of several typical standard film-riding gas film seals were introduced,and their advantages and problems in the application of aeroengines were analyzed. Secondly, the development status of filmriding gas film seal technology at home and abroad were reviewed from two aspects:theoretical and experimental research. Finally, the development status and research directions of aeroengine gas film sealing technology which need attention were summarized. The results show that the film-riding gas seal is an important direction with great development potential in aeroengine sealing technology, but most of the existing film-riding gas seal technologies cannot meet the technical requirements of high-performance aeroengines, and it is still necessary to accelerate the research and development of related basic technologies.更多还原