Fire resistant bearing compartment cover

摘要

A fire resistant bearing compartment cover (86) for a gas turbine engine features a fluid tight outer wall (106) comprised of an axially extending, radially converging support shell (90) and an axially extending piston ring carrier (92) joined to the support shell by a circumferentially continuous fluid tight joint (104). A heatshield (110) joined to the inner end of the support shell by another circumferentially continuous fluid tight joint (118) and slidably engaging the outer end of the support shell at an expansion joint (128) defines a stagnant air cavity (112). The arrangement reduces the likelihood that any oil leaking out of the bearing compartment will accumulate and be ignited by turbine cooling air (45) which leaks into the cavity.