Back to results
US 2009/0155088 A1Published application
Dust hole dome blade
AssigneeGeneral Electric Company
InventorsChing-Pang Lee, Tingfan Pang, Brian Alan Norton, Jan Christopher Schilling, Aspi Rustom Wadia
Life of this patent
Estimating the term…
Abstract
A hollow turbine airfoil includes a tip cap bounding an internal cooling circuit between opposite pressure and suction sidewalls. The tip cap includes an internal dome surrounding a dust hole, and the dome is inclined inwardly toward the airfoil root both transversely between the opposite sidewalls and chordally between opposite leading and trailing edges of the airfoil.
Claims33
A turbine blade comprising:
- an airfoil including opposite pressure and suction sidewalls extending longitudinally in span from root to tip and laterally in chord between leading and trailing edges;
- said sidewalls being transversely spaced apart to define an internal cooling circuit having a plurality of longitudinal flow passages separated in chord by corresponding partitions;
- said airfoil further includes a tip cap recessed inwardly from said airfoil tip to define an exposed tip well, and having an internal dome surrounding a dust hole extending in flow communication from said cooling circuit to said well;
- and
- said dome is inclined inwardly both transversely between said sidewalls and chordally between said leading and trailing edges, and is coextensive with at least one of said passages.
2 more elements
A turbine blade comprising:
- a hollow airfoil integrally joined to a platform and dovetail, and having opposite pressure and suction sidewalls extending longitudinally in span from root to tip and laterally in chord between opposite leading and trailing edges;
- said airfoil further including a tip cap recessed inwardly from said tip to define an exposed tip well laterally bound by said sidewalls, and having a dust hole extending therethrough;
- and
- said tip cap further includes an internal dome surrounding said dust hole and inclined longitudinally inwardly from said dust hole toward said root chordally between said leading and trailing edges, and increasing in elevation transversely from said sidewalls to said dust hole.
1 more element
A turbine blade comprising:
- a hollow airfoil integrally joined to a platform and dovetail, and having opposite pressure and suction sidewalls extending longitudinally in span from root to tip and laterally in chord between opposite leading and trailing edges;
- said airfoil further including a tip cap bridging said sidewalls at said tip, and having a dust hole extending therethrough;
- said airfoil further includes an internal cooling circuit having a plurality of longitudinal flow passages extending from said root to said tip, and said dust hole is disposed in flow communication with the longitudinal outer end of one of said passages;
- said tip cap further includes an internal dome surrounding said dust hole and inclined longitudinally inwardly toward said root both transversely between said sidewalls and chordally between said leading and trailing edges;
- and
- wherein said dome is generally concave and decreases in elevation laterally from said dust hole toward said transversely opposite pressure and suction sidewalls and chordally opposite leading and trailing edges.
3 more elements
Dependencies are inferred from the claim text.