TURBINE BLADES AND METHODS OF MANUFACTURING
First Claim
1. A turbine blade, comprising:
- a convex suction side wall including a first tip edge;
a concave pressure side wall opposite the convex suction side wall and including a second tip edge;
a tip wall extending between the convex suction side wall and the concave pressure side wall and coupling the convex suction side wall to the concave pressure side wall, the tip wall is recessed from the first tip edge of the suction side wall and the second tip edge of the concave pressure side wall to define a suction side wall tip section and a pressure side wall tip section, the suction side wall tip section being shorter than the pressure side wall tip section;
an internal cooling circuit formed at least partially between the convex suction side wall, the concave pressure side wall, and the tip wall; and
a plurality of tip edge channels formed through the first tip edge of the convex suction side wall that extend to the internal cooling circuit.
2 Assignments
0 Petitions
Accused Products
Abstract
A turbine blade includes a convex suction side wall, a concave pressure side wall, a tip wall, an internal cooling circuit, and a plurality of tip edge channels. The tip wall is recessed from a first tip edge of the suction side wall and a second tip edge of the concave pressure side wall to define a suction side wall tip section and a pressure side wall tip section, and the suction side wall tip section is shorter than the pressure side wall tip section. The internal cooling circuit is formed at least partially between the convex suction side wall, the concave pressure side wall, and the tip wall. The plurality of tip edge channels formed through the first tip edge of the convex suction side wall extend to the internal cooling circuit. Methods of manufacturing turbine blades are also provided.
46 Citations
20 Claims
-
1. A turbine blade, comprising:
-
a convex suction side wall including a first tip edge; a concave pressure side wall opposite the convex suction side wall and including a second tip edge; a tip wall extending between the convex suction side wall and the concave pressure side wall and coupling the convex suction side wall to the concave pressure side wall, the tip wall is recessed from the first tip edge of the suction side wall and the second tip edge of the concave pressure side wall to define a suction side wall tip section and a pressure side wall tip section, the suction side wall tip section being shorter than the pressure side wall tip section; an internal cooling circuit formed at least partially between the convex suction side wall, the concave pressure side wall, and the tip wall; and a plurality of tip edge channels formed through the first tip edge of the convex suction side wall that extend to the internal cooling circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A turbine blade, comprising:
-
a convex suction side wall including a first tip edge; a concave pressure side wall opposite the convex suction side wall and including a second tip edge; a tip wall extending between the convex suction side wall and the concave pressure side wall and coupling the convex suction side wall to the concave pressure side wall, the tip wall recessed from first the tip edge of the suction side wall and the second tip edge of the concave pressure side wall to define a suction side wall tip section and a pressure side wall tip section, the suction side wall tip section being shorter than the pressure side wall tip section; an internal cooling circuit formed at least partially between the convex suction side wall, the concave pressure side wall, and the tip wall; a plurality of tip edge channels formed through the first tip edge of the convex suction side wall that extend to the internal cooling circuit; and a plurality of pressure wall openings formed through the concave pressure side wall to communicate with the internal cooling circuit. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A method of manufacturing a turbine blade having an internal cooling circuit and an airfoil shape defined by a convex suction side wall, a concave pressure side wall, a tip wall, a leading edge, a trailing edge, a root and a tip recess, the convex suction side wall, the concave pressure side wall, and the tip wall each including a surface that defines at least a portion of an internal cooling circuit, the convex suction side wall and the concave pressure side wall each having a tip edge, the tip wall recessed from a first tip edge of the suction side wall and a second tip edge of the pressure side wall to define a suction side wall tip section and a pressure side wall tip section, respectively, the suction side wall tip section being shorter in height than the pressure side wall tip section, the method comprising the steps of:
-
forming cores shaped substantially similarly to the internal cooling circuit and to a portion of the tip recess; forming the turbine blade around the cores, the blade having an outer surface defined by a convex suction side wall, a concave pressure side wall, a tip wall, a leading edge, a trailing edge, a root and a tip recess, the convex suction side wall, the concave pressure side wall, and the tip wall each including a surface that defines at least a portion of an internal cooling circuit, the convex suction side wall and the concave pressure side wall each having a tip edge, the tip wall spaced apart from the tip edge of the suction side wall and the tip edge of the pressure side wall to define a suction side wall tip section and a pressure side wall tip section; removing the cores from the turbine blade to expose the internal cooling circuit of the turbine blade; removing a portion of the tip section of the convex suction side wall such that the suction side wall tip section is shorter in height than the pressure side wall tip section; and machining at least one tip edge channel through the convex suction side wall from the first tip edge thereof to the internal cooling circuit of the turbine blade. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification