Improved Bearing Compartment Sealing for Gas Turbine Engines

The Stein Seal company will select carbon materials for advanced high speed, high displacement and high temperature bearing compartment seals. Selections will be validated through wear, exudation, oxidation and fluid compatibility testing. Preliminary designs of robust bearing compartment seals will be completed with capability to operate at 450 ft/s interface speeds, 2 to 85 psid pressure differentials, and accommodate radial motions up to 0.1 inches. Analysis and preliminary designs of counter-rotating intershaft seals that can operate at an interface velocity of 1200 ft/s will be established. Possibilities of using seal housing inserts or coatings in conjunction with titanium will be determined.