초록 ▼

A buffer seal arrangement is provided for improved buffer sealing of oil sump seals in gas turbine engines. The buffer seal arrangement includes a three section labyrinth seal. Disposed between the first and second section is a buffer air supply annulus for delivering pressurized air from the engine

A buffer seal arrangement is provided for improved buffer sealing of oil sump seals in gas turbine engines. The buffer seal arrangement includes a three section labyrinth seal. Disposed between the first and second section is a buffer air supply annulus for delivering pressurized air from the engine to said first and second sections of the seal. Oil drains are disposed between said second and third sections and adjacent the third section. The first section has four knife seals, and the second and third sections have three knife seals. Rig testing has shown that this buffer seal arrangement can prevent the leakage of oil into the gas path of the gas turbine engine.

대표청구항 ▼

[ What is claimed is:] [8.]8. A buffer labyrinth seal system comprising: a labyrinth seal having a first and second sections; a buffer air supply annulus disposed between said first and second sections for delivering pressurized air from a conduit to said first and second sections; a first drain ann

[ What is claimed is:] [8.]8. A buffer labyrinth seal system comprising: a labyrinth seal having a first and second sections; a buffer air supply annulus disposed between said first and second sections for delivering pressurized air from a conduit to said first and second sections; a first drain annulus disposed adjacent said second section on the side of said second section opposite the side adjacent said buffer air supply annulus; said first section having three knife seals, said second section having one knife seal and a slinger.