Hybrid bucket and related method of pocket design

Details Hybrid bucket and related method of pocket design Hybrid bucket and related method of pocket design

2006-09-12

2006-09-12

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Having wear liner, sheathing or insert

C416S22900R, C416S500000

Reexamination Certificate

active

07104760

ABSTRACT:
A steam turbine rotor wheel includes a plurality of blades secured about a circumferential periphery of the wheel, each blade comprising a shank portion and an airfoil portion, the airfoil portion having at least one pocket filled with a filler material, wherein at least one edge of the pocket adjacent a leading edge of the blade is formed with an undercut.

REFERENCES:
patent: 5720597 (1998-02-01), Wang et al.
patent: 5931641 (1999-08-01), Finn et al.
patent: 5947688 (1999-09-01), Schilling et al.
patent: 6033186 (2000-03-01), Schilling et al.
patent: 6039542 (2000-03-01), Schilling et al.
patent: 6042338 (2000-03-01), Brafford et al.
patent: 6139278 (2000-10-01), Mowbray et al.
patent: 6287080 (2001-09-01), Evans et al.
patent: 2002/0164253 (2002-11-01), von Flotow
U.S. Appl. No. 10/249,518, filed Apr. 16, 2003, entitled “Mixed Tuned Hybrid Bucket and Related Method”.

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