某型航空发动机石墨密封环应用与失效分析

Application and Failure Analysis of Graphite Seal Ring on an Aero Engine

在介绍机械密封技术在航空发动机中的应用特别是对石墨环密封技术的原理、优缺点和在应用中遇到的失效问题进行研究的基础上,结合某型涡轴发动机空气起动机减速器石墨环密封部位滑油泄漏故障,通过对密封元件和磨损痕迹进行测量和检查,分析石墨密封失效原因,并对如何防止失效再次发生给出相应的改进建议。

The application of mechanical seal technology to aero-engine is introduced.The principle,advantages and disadvantages of graphite seal ring and problems encountered in application are analyzed and discussed.Regarding oil leakage in the graphite seal ring on the turbine reducer of a turbo-shaft engine air-starter,sealing component wear is measured and inspected for the cause of seal failure.Suggestions are also given on preventing the failure from happening again.