刷式密封技术的研究进展

Research Progress of Brush Seal Technology

刷式密封技术凭借其优良的封严性能而在航空发动机、燃气轮机和汽轮机中应用。简要回顾了典型刷式密封技术及其发展历程,综述了刷式密封的泄漏特性、摩擦传热特性、力学行为、闭合和迟滞效应以及转子动力特性的研究进展,介绍了MTU箍制刷式密封技术及其在湿蒸汽环境下的试验研究结果,以及目前非金属丝刷式密封技术的研究和应用情况,总结了刷式密封技术流热固耦合特性的研究成果,探讨了刷式密封技术在航空发动机真实运行工况下运行寿命和性能可靠性方面需要深入研究的内容,为刷式密封技术在透平行业中的高效应用提供了技术支撑。

Brush seal was widely used in aeroengine,gas turbine and steam turbine due to its excellent seal performance. The typical brush seal technology and its development course were briefly retrospected. The research progress on leakage characteristics,friction and heat transfer characteristics,mechanical behavior,blow down and hysteresis effects and rotor dynamic characteristics of brush seal were summarized. The brush seal technology made by MTU hoop and its test results in wet steam environment were introduced. The research and application of non-metallic wire brush seal technology were briefly introduced. The research results of fluid-thermal-solid coupling characteristics of brush seal technology were summarized. The contents of brush seal technology which needed to be deeply studied in terms of service life and performance reliability of aeroengine were discussed under real operating conditions. It provides technical support for the efficient application of brush seal technology in turbine industry.