Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Between blade edge and static part
Reexamination Certificate
2007-06-21
2010-06-22
Kershteyn, Igor (Department: 3745)
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
Between blade edge and static part
C415S174400
Reexamination Certificate
active
07740445
ABSTRACT:
A turbine blade with a plurality of near wall cooling channels on both the pressure side wall and suction side wall of the blade, and a plurality of tip cooling channels that open into a concave impingement cavity formed on the upstream side wall of a squealer tip rail that extends from the trailing edge and along the suction side wall of the blade, around the leading edge and ends on the pressure side wall just past the leading edge. The tip cooling channels provide cooling for the blade tip and inject the spent cooling air into the concave impingement cavity which then redirects the spent cooling air toward the oncoming hot gas flow leakage to produce a cushion against the hot gas flow to push the flow up and over the tip. Cooling air from a root supply cavity flows up through the plurality of suction side cooling channels to provide near wall cooling for the blade, then discharges into a cooling air collector cavity formed between the pressure and suction side walls. The cooling air then migrates toward the platform and then flows into the pressure side wall cooling channels to provide near wall cooling, and then into the tip cooling channels before discharging into the concave tip cavity that extends along the tip rail.
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Florida Turbine Technologies, Inc.
Kershteyn Igor
Ryznic John
LandOfFree
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