Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2007-09-07
2011-11-01
Wiehe, Nathan (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
Reexamination Certificate
active
08047787
ABSTRACT:
A turbine rotor blade for use in an industrial gas turbine engine in which the blade includes a root section with a fillet region formed between the root and the platform of the blade. The platform region includes a diamond shaped root slot to discharge cooling air from the internal cooling passage out through the trailing edge of the blade. The diamond shaped cooling slot of the present invention comprises a smaller radius at the upper and lower corners and a much larger radius at the mid section of the slot. The cooling slot is positioned in the trailing edge root section where the upper corner is positioned above the fillet run out location. The diamond shaped cooling slot thus minimizes the high stresses induced by the stress concentration from the cooling slot and the fillet run out location.
REFERENCES:
patent: 6190128 (2001-02-01), Fukuno et al.
patent: 6481967 (2002-11-01), Tomita et al.
patent: 6851924 (2005-02-01), Mazzola et al.
Eastman Aaron R
Florida Turbine Technologies, Inc.
Ryznic John
Wiehe Nathan
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