Steam turbine rotating blade for a low pressure section of a steam turbine engine
AssigneeGeneral Electric Company
InventorsMuhammad Saqib Riaz, Vyacheslav Filyayev
Life of this patent
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Abstract
A steam turbine rotating blade for a low pressure section of a steam turbine engine is disclosed. The steam turbine rotating blade includes an airfoil portion. A root section is attached to one end of the airfoil portion. A dovetail section projects from the root section, wherein the dovetail section includes a skewed axial entry dovetail. A tip section is attached to the airfoil portion at an end opposite from the root section. A cover is integrally formed as part of the tip section. The blade includes an exit annulus area of about 30.5 ft2 (2.83 m2) greater.
Claims20
A steam turbine rotating blade, comprising:
- an airfoil portion;
- a root section attached to one end of the airfoil portion;
- a dovetail section projecting from the root section, wherein the dovetail section comprises a skewed axial entry dovetail;
- a tip section attached to the airfoil portion at an end opposite from the root section;
- a cover integrally formed as part of the tip section;
- and
- wherein the blade comprises an exit annulus area of about 30.5 ft2 (2.83 m2) or greater.
A low pressure turbine section of a steam turbine, comprising:
- a plurality of latter stage steam turbine blades arranged about a turbine rotor wheel, wherein each of the plurality of latter stage steam turbine blades comprises:
- an airfoil portion having a length of 18.5 inches (46.99 centimeters) or greater;
- a root section attached to one end of the airfoil portion;
- a dovetail section projecting from the root section, wherein the dovetail section comprises a skewed axial entry dovetail;
- a tip section attached to the airfoil portion at an end opposite from the root section;
- a cover integrally formed as part of the tip section;
- and
- wherein the plurality of latter stage steam turbine blades comprises an exit annulus area of about 30.5 ft2 (2.83 m2) or greater.
Dependencies are inferred from the claim text.