Turbine blade tip cooling construction
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United States of America Patent
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N/A
Issued Date -
Jan 30, 2003
app pub date -
Apr 15, 2002
filing date -
Jul 24, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A gas turbine blade (1) with a tip squealer (7) comprises cooling passages (12, 13) that provide cooling fluid for the cooling of the tip squealer (7). A first portion of the cooling passages (12) extends from an internal hollow space (11) through an end cap to a tip pocket. A second portion (13) of the cooling passage extends from the end cap in part through the rails (8) of the tip squealer (7) to the tip crown (9). The second portion (13) is partially bounded by the rail (8) and partially open to the tip pocket (14). The cooling passages according to the invention provide an improved cooling of the tip squealer and have the advantage that cooling fluid can cool the tip squealer (7) even in the event of clogging of the second portions (13) of the passages.
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