Conical tip shroud fillet for a turbine bucket

Details Conical tip shroud fillet for a turbine bucket Conical tip shroud fillet for a turbine bucket

2006-06-20

2006-06-20

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

C416S191000, C416S22300B

Reexamination Certificate

active

07063509

ABSTRACT:
A turbine bucket airfoil has a conical fillet about the intersection of the airfoil tip and tip shroud having a nominal profile in accordance with coordinate values of X and Y, offset 1, offset 2 and Rho set forth in Table I. The shape parameters of offset 1, offset 2 and Rho define the configuration of the fillet at the specified X and Y locations about the fillet to provide a fillet configuration accommodating high localized stresses. The fillet shape may be parabolic, elliptical or hyperbolic as a function of the value of the shape parameter ratio ofD1D1+D2at each X, Y location where D1 is a distance between an intermediate point along a chord between edge points determined by offsets O1 and O2 and a shoulder point on the fillet surface and D2 is a distance between the shoulder point and an apex location at the intersection of the airfoil tip and tip shroud.

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patent: 6685434 (2004-02-01), Humanchuk et al.
patent: 6808368 (2004-10-01), Tomberg et al.
patent: 6832897 (2004-12-01), Urban

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