STEAM TURBINE ROTOR BLADE ASSEMBLY
First Claim
Patent Images
1. A steam turbine rotor blade assembly comprising:
- an airfoil;
a shroud provided at a tip of the airfoil;
a blade root projecting toward a radially internal circumferential side of a turbine rotor and fitted to a root attachment provided on an outer circumferential portion of the turbine rotor;
a platform provided between the airfoil and the blade root;
a pin provided between the blade root and the root attachment;
a bore formed between respective surfaces of the shrouds facing each other and included in the respective adjacent rotor blades; and
a bar-like member provided in the bore.
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Abstract
The present invention is a steam turbine rotor blade assembly including: an airfoil; a shroud provided at a tip of the airfoil; a blade root (dovetail) projecting toward a radially internal circumferential side of a turbine rotor and fitted to a root attachment provided on an outer circumferential portion of the turbine rotor; a platform provided between the airfoil and the blade root; a pin provided between the blade root and the root attachment; a bore formed between respective surfaces of the shrouds facing each other and included in the respective adjacent rotor blades; and a bar-like member provided in the bore.
27 Citations
12 Claims
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1. A steam turbine rotor blade assembly comprising:
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an airfoil; a shroud provided at a tip of the airfoil; a blade root projecting toward a radially internal circumferential side of a turbine rotor and fitted to a root attachment provided on an outer circumferential portion of the turbine rotor; a platform provided between the airfoil and the blade root; a pin provided between the blade root and the root attachment; a bore formed between respective surfaces of the shrouds facing each other and included in the respective adjacent rotor blades; and a bar-like member provided in the bore. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A steam turbine rotor blade assembly comprising:
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an airfoil; a shroud provided at a tip of the airfoil; a blade root projecting toward a radially internal circumferential side of a turbine rotor and fitted to a root attachment provided on an outer circumferential portion of the turbine rotor; a platform provided between the airfoil and the blade root; a bore formed between respective surfaces of the shrouds facing each other and included in the respective adjacent rotor blades; and a bar-like member provided in the bore; wherein a clearance between the bore and the bar-like member during assembly is made smaller than a difference of displacement between respective bores of the shroud surfaces adjacent to each other, during rotation of a turbine. - View Dependent Claims (12)
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Specification