Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Having wear liner – sheathing or insert
Reexamination Certificate
2007-01-26
2010-11-30
Kershteyn, Igor (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Having wear liner, sheathing or insert
C416S22900R
Reexamination Certificate
active
07841834
ABSTRACT:
A replaceable leading edge insert for a rotor blade and a process for replacing a damaged leading edge portion of a blade on an integrally bladed rotor. The insert is a fibrous reinforced composite insert with a scarf joint to secure the insert to the blade. The insert includes an aft extending portion that engages with the opposed surface of the blade to hold the insert against radial displacement from the blade during operation. in one embodiment, a plurality of teeth extend from the lower portion of the insert and engage similar teeth on the rotor blade. When the insert is bonded to the rotor blade, the teeth add additional holding force against radial displacement should the bond weaken. The process includes removing a damaged portion from the blade leading edge such that a bonding surface remains for a standard shaped replaceable leading edge insert to fit on. The insert is bonded to the rotor blade to form a completed airfoil portion.
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Florida Turbine Technologies, Inc.
Kershteyn Igor
Ryznic John
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