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

2005-02-22

2005-02-22

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

C416S22300B, C416S248000, C415S914000

Reexamination Certificate

active

06857853

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, offset1, offset2and Rho set forth in Table I. The shape parameters of offset1, offset2and 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 Dl is a distance between an intermediate point along a chord between edge points determined by offsets O2and O2and 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.

REFERENCES:
patent: 4259037 (1981-03-01), Anderson
patent: 5244345 (1993-09-01), Curtis
patent: 5397215 (1995-03-01), Spear et al.
patent: 6017186 (2000-01-01), Hoeger et al.
patent: 6283713 (2001-09-01), Harvey et al.
patent: 6524070 (2003-02-01), Carter

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