Rotating gas turbine blade and gas turbine with such a blade
First Claim
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1. A rotating gas turbine blade, comprising:
- an airfoil with a suction side and a pressure side, said airfoil extending in a radial direction from a blade root to a blade tip, wherein said blade tip includes a tip shroud, said airfoil having internal cooling passages for a cooling medium, which extend through said tip shroud, and outlet ports are provided above a selected internal airfoil cooling passage for said cooling medium to be ejected above said tip shroud in a direction of the blade'"'"'s pressure side, said tip shroud is provided with two or more fins extending in parallel to each other on an upper side of said tip shroud in a circumferential direction, and interspaces are defined between neighboring of said fins, wherein holes for avoiding dust accumulation are provided at a tip end of said selected internal cooling passage, and wherein said interspaces are provided with elevated areas, and said outlet ports and said holes for avoiding dust accumulation are disposed in said elevated areas.
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Abstract
A rotating gas turbine blade is disclosed which includes an airfoil with a suction side and a pressure side, the airfoil extending in a radial direction from a blade root to a blade tip. The blade tip includes a tip shroud, the airfoil having internal cooling passages for a cooling medium, which extend through the tip shroud. Outlet ports are provided above a selected internal airfoil cooling passage for the cooling medium to be ejected above the tip shroud in a direction of the blade'"'"'s pressure side. Dust accumulation is avoided at the tip end of the selected internal cooling passage.
5 Citations
20 Claims
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1. A rotating gas turbine blade, comprising:
an airfoil with a suction side and a pressure side, said airfoil extending in a radial direction from a blade root to a blade tip, wherein said blade tip includes a tip shroud, said airfoil having internal cooling passages for a cooling medium, which extend through said tip shroud, and outlet ports are provided above a selected internal airfoil cooling passage for said cooling medium to be ejected above said tip shroud in a direction of the blade'"'"'s pressure side, said tip shroud is provided with two or more fins extending in parallel to each other on an upper side of said tip shroud in a circumferential direction, and interspaces are defined between neighboring of said fins, wherein holes for avoiding dust accumulation are provided at a tip end of said selected internal cooling passage, and wherein said interspaces are provided with elevated areas, and said outlet ports and said holes for avoiding dust accumulation are disposed in said elevated areas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A gas turbine, comprising:
a rotor with a plurality of rotating gas turbine blades, each of the plurality of rotating gas turbine blades having an airfoil with a suction side and a pressure side, said airfoil extending in a radial direction from a blade root to a blade tip, wherein said blade tip includes a tip shroud, said airfoil having internal cooling passages for a cooling medium, which extend through said tip shroud, and outlet ports are provided above a selected internal airfoil cooling passage for said cooling medium to be ejected above said tip shroud in a direction of the blade'"'"'s pressure side, said tip shroud is provided with two or more fins extending in parallel to each other on an upper side of said tip shroud in a circumferential direction, and interspaces are defined between each of said fins, and elevated areas within each of said interspaces, and wherein holes for avoiding dust accumulation are provided at a tip end of said selected internal cooling passage and extend in a radial direction from said selected internal cooling passage to an outside above said tip shroud, and wherein said outlet ports and said holes for avoiding dust accumulation are disposed in said elevated areas. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification