Abstract

A test apparatus is described that evaluates the performance of static aviation seals under an environment similar to the lubrication system in gas turbine engines. The seals can be tested at operating temperatures as high as 400 °C in a static seal rig (SSR). Incorporating an air–oil mist generating system, the test facility exposes the seals to degraded oil, which can deteriorate the performance of seals through chemical attack. The test rig provides representative operating conditions to test four piston and four face seals at the same time. Throughout the aging process of seals, the rig carries out pressure decay leak tests at regular intervals and monitors temperature and pressure at several locations in the test chamber. The capabilities of the rig are demonstrated by presenting the results of durability testing with five types of seals. The results obtained with both successful and failed seals indicate that regular leak testing along with real-time measurement of temperature at the outlet of the low-pressure cavity can provide adequate information as to the operating status of the seals at different stages of testing and operating conditions.

摘要

描述了一种测试设备，该设备在类似于燃气涡轮发动机中的润滑系统的环境下评估静态航空密封件的性能。可以在静态密封装置（SSR）中在高达400°C的工作温度下测试密封件。该测试设备集成了气雾油生成系统，使密封件暴露于降解的机油中，这会因化学侵蚀而使密封件的性能下降。该测试台提供了代表性的工作条件，可以同时测试四个活塞和四个端面密封。在密封件的整个老化过程中，钻机会定期进行压力衰减泄漏测试，并在测试室内的多个位置监视温度和压力。通过展示五种类型的密封件的耐久性测试结果来证明该钻机的功能。