Steam Turbine Rotating Blade
AssigneeNuovo Pignone Holdings, S.p.A.
InventorsJonathon Slepski, Muhammad Riaz
Life of this patent
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Abstract
A rotating blade for a steam turbine includes a root section and an airfoil section contiguous with the root section. The airfoil section is shaped to optimize aerodynamic performance while providing optimized flow distribution and minimal centrifugal and bending stresses. The blade also includes a tip section continuous with the airfoil section, and a cover formed as part of the tip section. The cover defines a radial seal that serves to minimize tip losses. The rotating blade is capable of running at operating speeds between 5626 and 11250 rotations per minute.
Claims17
A rotating blade for a steam turbine comprising:
- a root section;
- an airfoil section contiguous with the root section, the airfoil section being shaped to optimize aerodynamic performance while providing optimized flow distribution and minimal centrifugal and bending stresses;
- a tip section continuous with the airfoil section;
- and
- a cover formed as part of the tip section, the cover defining a radial seal that minimizes tip losses.
A rotating blade for a steam turbine comprising:
- a root section;
- an airfoil section contiguous with the root section, the airfoil section being shaped to optimize aerodynamic performance while providing optimized flow distribution and minimal centrifugal and bending stresses;
- a tip section continuous with the airfoil section and having a tip width;
- and
- a cover formed as part of the tip section, the cover defining a radial seal that minimizes tip losses, wherein the cover is wider than the tip width such that at speed, the cover engages an adjacent cover of an adjacent blade, and
- wherein an exit annulus area of the blade is 0.143 m2, an operating speed range of the blade is between 5625 and 11250 rotations per minute, and a maximum mass flow of the blade is 30.9 kg/s.
Dependencies are inferred from the claim text.