Composite air cooled turbine rotor blade
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United States of America Patent
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Jun 12, 2012
Grant Date -
N/A
app pub date -
Sep 25, 2009
filing date -
Sep 25, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A composite turbine rotor blade that uses the high heat resistance capability of a ceramic material along with the high strength capability of a high strength metallic material. The blade includes a metallic piece with the blade root and platform with a leading edge spar and a trailing edge spar extending from the platform. The two spars form radial cooling channels for the edges of the blade. A ceramic mid-chord piece is secured between the two spars by a T-shape tip rail piece that includes a tip rail cooling channel extending from the leading edge to the trailing edge. The tip rail piece includes a hollow radial pin that extends through the root to secure to the tip rail piece to the rest of the blade and supply cooling air to the tip rail cooling channel.
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