Senior Design 2020 – Mechanical Engineering Team 45
Mechanical Engineering Team 45
Ian Hancock Linh Quach Jillian Scherpa
Thermal and Vibration Testing of Static Carbon Graphite Flange Seals
Our goal is to simulate flight effects on the gasket by performing vibration, thermal, and pressure testing. The vibration test will vibrate the seal at a frequency of 100 Hz at an acceleration of 10 g’s for 150 hours. The thermal test will heat the seal from 100 °F to 500 °F for 3000 cycles. Lastly, the pressure test will load the seal from 0 to 500 psi for 1000 cycles. During each test, the gasket will be torqued down inside a test rig designed by the team; utilizing six test rigs that torque down the seal at different crush heights ranging from .015 - .040 inches.
The success criteria will be found during the pressure test after the seal undergoes thermal and vibration testing. When a seal fails during pressure testing, oil leakage is seen with a UV flashlight through the use of fluorescent dye mixed into the oil. If a graphite seal goes through each test without leaking, there is evidence to support its ability to adequately replace the currently used spiral wound graphite with metal backed gaskets.