CONFIGURATIONS FOR TURBINE ROTOR BLADE TIPS
First Claim
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1. A rotor blade for a turbine of a gas turbine system, the rotor blade comprising an airfoil that includes a pressure sidewall and a suction sidewall defining an outer periphery;
- wherein the pressure sidewall and suction sidewall of the airfoil connect along a leading edge and a trailing edge, and extend radially between a root and a tip;
wherein the tip defines an outer radial end of the airfoil, the tip including a cap from which an outboard projecting rail defines a tip cavity;
wherein the airfoil includes a winglet positioned near the tip of the airfoil; and
wherein a rail gap is formed through an aftward section of the rail.
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Abstract
A rotor blade for a turbine of a gas turbine system. The rotor blade may include: an airfoil that includes a pressure sidewall and a suction sidewall defining an outer periphery, wherein the pressure sidewall and suction sidewall of the airfoil connect along a leading edge and a trailing edge; a tip that defines an outer radial end of the airfoil, wherein the tip included a cap on which an outboard projecting rail defines a tip cavity; and a rail gap formed through an aftward section of the rail.
20 Citations
20 Claims
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1. A rotor blade for a turbine of a gas turbine system, the rotor blade comprising an airfoil that includes a pressure sidewall and a suction sidewall defining an outer periphery;
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wherein the pressure sidewall and suction sidewall of the airfoil connect along a leading edge and a trailing edge, and extend radially between a root and a tip; wherein the tip defines an outer radial end of the airfoil, the tip including a cap from which an outboard projecting rail defines a tip cavity; wherein the airfoil includes a winglet positioned near the tip of the airfoil; and wherein a rail gap is formed through an aftward section of the rail. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A combustion turbine engine having rotor blades arranged in a row about a central axis in the turbine;
wherein each of the rotor blades comprises; an airfoil that includes a pressure sidewall and a suction sidewall defining an outer periphery, wherein the pressure sidewall and suction sidewall of the airfoil connect along a leading edge and a trailing edge, and extend radially between a root and a tip, wherein the tip defines an outer radial end of the airfoil, the tip including a cap from which an outboard projecting rail defines a tip cavity;
wherein the rail includes a pressure rail and a suction rail that correspond, respectively, to the pressure sidewall and the suction sidewall of the airfoil;a winglet that is positioned near the tip of the airfoil and formed on the suction sidewall; and a rail gap that is formed through an aftward section of the suction rail, wherein the rail gap comprises a section truncated from the suction rail that comprises between 10% and 30% of a chordwise length of the suction rail.
Specification