초록 ▼

This invention relates to a method of thermally isolating a bearing located near the combustion region in a gas turbine. Air is bled from an intermediate stage of the compressor turbine and is arranged to be fed to the central pipe of a coaxial piping arrangement which leads to the bearing housing.

This invention relates to a method of thermally isolating a bearing located near the combustion region in a gas turbine. Air is bled from an intermediate stage of the compressor turbine and is arranged to be fed to the central pipe of a coaxial piping arrangement which leads to the bearing housing. The housing for the bearing is arranged to have cooling air passages located therein to allow the air to circulate around and thus isolate the various parts of the bearing from the hot ambient. The air which has thereby acquired heat is subsequently lead back to the coaxial piping arrangement and is fed outwardly through the turbine in the space between the outer pipe and the central pipe.

대표청구항 ▼

A method of cooling a bearing in a location adjacent the combustor section in a gas turbine engine comprising, bleeding compressed air from an intermediate stage of the compressor section of said engine, feeding said compressed air into the inner pipe of a coaxial pair of pipes which passes from a p

A method of cooling a bearing in a location adjacent the combustor section in a gas turbine engine comprising, bleeding compressed air from an intermediate stage of the compressor section of said engine, feeding said compressed air into the inner pipe of a coaxial pair of pipes which passes from a point outside the casing of said turbine through said casing and through said combustor section to the housing of said bearing, said housing having a pair of separated channels therein, a first channel being in communication with said inner pipe of said coaxial pair, said first channel delivering cooling air to a pair of annular shaped recesses therein, where the cooling air is heated, bleeding said heated cooling air from said annular recesses to a central gathering passage, which passage is in communication with the outer pipe of said coaxial pair, passing substantially all said heated cooling air through said outer pipe to atmosphere.