Repair method for a blade of a turbomachine

Details Repair method for a blade of a turbomachine Repair method for a blade of a turbomachine

2007-11-13

2007-11-13

Edgar, Richard A (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

C029S889100

Reexamination Certificate

active

10933256

ABSTRACT:
A turbomachine blade is repaired by making a leading edge cutback between two points (A) and (E) where point (A) lies within a range of relative blade height (h/H) of 0≦(h/H)point A<0.85, and point (E) lies within a range of 0.95<(h/H)point E≦1.0, with (h) being a blade height coordinate which originates at an end of the blade closer to starting point (A), and (H) being the blade height. A cutback trace is defined by (s/SAE) and (c/Cm), with (c) being a local cutback length in meridional flow direction, (Cm) being a meridional chord length, (s) being a local cutback length in radial direction, and (SAE) being a radial cutback length, where (c) gradually increases from point (A) to its maximum at 0.60<s/SAE<0.95, with (c/Cm) there being ≦0.25, and then decreasing to ≦0.05.

REFERENCES:
patent: 5197191 (1993-03-01), Dunkman et al.
patent: 6438838 (2002-08-01), Meier
patent: 19712868 (1997-03-01), None
patent: 19831736 (1998-07-01), None

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