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US 10,400,610 B2Granted
Turbine blade having a tip shroud notch
AssigneeGeneral Electric Company
InventorsWilliam Scott Zemitis, Richard Ryan Pilson, Melbourne James Myers
Life of this patent
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Abstract
A turbine blade includes an airfoil that extends from a root end to a tip end, and a tip shroud extending from the tip end. The tip shroud includes a shroud plate that includes a pressure side edge. The pressure side edge includes a primary contact surface configured to couple against an adjacent tip shroud, and a notch extending at least partially downstream from the primary contact surface.
Claims18
A turbine blade comprising:
- an airfoil that extends from a root end to a tip end;
- and
- a tip shroud extending from said tip end, said tip shroud comprising:
- a shroud plate that comprises a pressure side edge, a leading edge, a radially inner surface, a radially outer surface, and a thickness defined between said radially inner surface and said radially outer surface;
- a first shroud rail adjacent said leading edge of said shroud plate;
- and
- a second shroud rail downstream from said first shroud rail, wherein said pressure side edge comprises:
- a primary contact surface configured to couple against an adjacent tip shroud;
- and
- a notch extending at least partially downstream from said primary contact surface and said second rail, wherein said notch comprises a transition point defined at a circumferentially inward-most point along said notch, and wherein said thickness of at least a first location along said notch, downstream from said second rail and upstream from said transition point, is at least twice said thickness of at least a second location along said notch, downstream from said transition point.
7 more elements
A turbine blade comprising:
- an airfoil that extends from a root end to a tip end;
- a tip shroud extending from said tip end, said tip shroud comprising a shroud plate that comprises a pressure side edge, said pressure side edge comprises a notch;
- a first shroud rail adjacent a leading edge of said shroud plate;
- and
- a second shroud rail downstream from said first shroud rail, a downstream pressure side edge of said second rail blends into a radially outer edge of said notch in a smooth, continuous arcuate profile that extends downstream from at least a radial midpoint of said second rail, wherein said second rail comprises a rail thickness defined between a radially inner surface of said shroud plate and a radially outer tip of said second rail, said rail thickness is within a range of from about 0.5 inches to about 0.7 inches, said profile comprises a radius of curvature of at least about 0.2 inches.
2 more elements
A turbine blade comprising:
- an airfoil that extends from a root end to a tip end;
- a tip shroud extending from said tip end, said tip shroud comprising a shroud plate that comprises:
- a radially inner surface, a radially outer surface, and a thickness defined therebetween;
- and
- a pressure side edge, said pressure side edge comprises a notch, said notch comprises a transition point defined at a circumferentially inward-most point along said notch, wherein said shroud plate has an axial length within a range of from about 3 inches to about 4 inches, a plane is defined transverse to a radial direction of said blade, a shape profile of said notch projected onto the plane is defined by a first plurality of points having coordinates listed in Table 1 subject to a tolerance, the first plurality of points joined with smooth continuous arcs, and a thickness profile along said notch for the first plurality of points is further listed in Table 1 subject to the tolerance.
2 more elements
Dependencies are inferred from the claim text.