Turbine blade with improved durability tip cap

Fluid reaction surfaces (i.e. – impellers) – With fluid passage in working member communicating with... – Discharge solely at periphery normal to rotation axis

Reexamination Certificate

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Reexamination Certificate

active

07726944

ABSTRACT:
A gas turbine engine has a turbine blade having a tip cap to close off internal cooling passages. The tip cap is formed with a plurality of purge holes, with there being at least two rows of purge holes. The increased number of purge holes spreads the cooling air outwardly across more of the surface area of the tip cap, and provides the tip cap with a better ability to withstand the extreme temperatures it faces in use.

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