航空发动机组合式弹性片金属密封环结构密封特性研究

推进技术 ›› 2018, Vol. 39 ›› Issue (2): 426-432.

航空发动机组合式弹性片金属密封环结构密封特性研究

艾延廷¹,来纯强¹,郝燕平²,孙丹¹,吴天元¹

沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室，辽宁沈阳 110136,沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室，辽宁沈阳 110136,中国航发沈阳发动机研究所，辽宁沈阳 110015,沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室，辽宁沈阳 110136,沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室，辽宁沈阳 110136

发布日期:2021-08-15
作者简介:艾延廷，男，博士，教授，研究领域为航空发动机结构完整性与可靠性，航空发动机故障诊断等。
基金资助:
国家自然科学基金(51675351)；航空基金(20140454003)；辽宁省自然科学基金(2015020113)。

Study on Sealing Characteristics of Composited Elastic Metal Sealing Rings Used in Aeroengine

Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aircraft Propulsion System，Shenyang Aerospace University，Shenyang 110136，China,Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aircraft Propulsion System，Shenyang Aerospace University，Shenyang 110136，China,AECC Shenyang Engine Institute，Shenyang 110015，China,Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aircraft Propulsion System，Shenyang Aerospace University，Shenyang 110136，China and Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aircraft Propulsion System，Shenyang Aerospace University，Shenyang 110136，China

Published:2021-08-15

摘要/Abstract

摘要： 为研究航空发动机组合式弹性片金属密封环结构的密封特性，设计和搭建了弹性片结构密封特性实验平台，研究腔室气体压力、弹性片压缩量对弹性片密封结构气体泄漏率和泄漏面积的影响规律。定量描述了气体泄漏量与弹性片压缩量及腔室气体压力的关系，分析了其密封机理。研究结果表明:气体泄漏率随腔室压力增大而线性增大；腔室气体压力使弹性片结构有一定的密封效果，压力越大密封效果越好，同时压力越大弹性片压缩量的增大对密封性的改善效果不显著；在压缩量较小或者腔室压力很低的条件下，接触泄漏和通道泄漏共存；当压缩量增大到0.80mm和腔室压力增大到0.40MPa时，继续增大压缩量或腔室压力对减小泄漏面积作用不大，泄漏面积会稳定在169mm2，即为通道泄漏面积。

关键词: 金属密封环；泄漏率；密封特性；泄漏面积

Abstract: In order to study the sealing characteristics of composite elastic metal sealing rings used in an aeroengine，an experimental platform for the sealing characteristics of elastic metal sealing rings was designed and built. Effects of gas pressure in the chamber and compression deformation of the elastic metal rings on the leakage rate and leakage area were studied. A quantitative description of the amount of leakage with the compression deformation and the chamber pressure was established，the sealing mechanism was analyzed. By the results of this experiment it is concluded that the leakage rate increases linearly with the increase of the chamber pressure. The pressure of the chamber makes the elastic metal sealing rings establish a certain sealing effect. The higher the pressure，the better the sealing effects. While the greater the pressure，the increasing of the compression deformation of elastic metal rings has no significant effects on the sealing performance. When the compression deformation is smaller or gas pressure in the chamber is lower，the contact leakage and channel leakage coexistence. When the compression deformation increases to 0.80mm and the chamber pressure increases to 0.40MPa，the increase of the compression or the chamber pressure has little effect on reducing the leakage area，and the leakage area will be stable at 169mm2，which is channel leakage area.

Key words: Metal sealing rings；Leakage rate；Sealing characteristics；Leakage area

艾延廷,来纯强,郝燕平,孙丹,吴天元. 航空发动机组合式弹性片金属密封环结构密封特性研究[J]. 推进技术, 2018, 39(2): 426-432.

AI Yan-ting¹,LAI Chun-qiang¹,HAO Yan-ping²,SUN Dan¹,WU Tian-yuan¹. Study on Sealing Characteristics of Composited Elastic Metal Sealing Rings Used in Aeroengine[J]. Journal of Propulsion Technology, 2018, 39(2): 426-432.

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