Abrasive coated preform for a turbine blade tip
AssigneeSiemens Energy, Inc.
InventorDavid B. Allen
Life of this patent
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Abstract
A squealer tip preform having a coating including an abrasive is disclosed. The squealer tip may be separately formed from a generally elongated blade to which the squealer tip preform is configured to be attached. The squealer tip may be configured such that an outer surface of the squealer tip preform is generally aligned with an outer side surface of the turbine blade defining a cross-sectional profile of the turbine blade. Forming the squealer tip preform with an abrasive coating separate from the turbine blade greatly reduces costs and improves efficiency as compared with conventional systems.
Claims18
A turbine blade, comprising:
- a generally elongated blade having a leading edge, a trailing edge, a tip at a first end, and a root coupled to the blade at an end generally opposite the first end for supporting the blade and for coupling the blade to a disc;
- and
- a squealer tip preform coupled to the tip at the first end, wherein the squealer tip is coated with a coating that includes at least one abrasive and wherein the squealer tip is formed separately from the generally elongated blade and wherein the squealer tip is configured such that an outer surface of the squealer tip preform is generally aligned with an outer side surface of the turbine blade defining a cross-sectional profile of the turbine blade;
- wherein the squealer tip preform includes a cubic boron nitride embedded in a nickel/CoNiCrAlY matrix.
A method of manufacturing a squealer tip preform for a turbine blade, comprising:
- forming a squealer tip preform having a footprint less than a cross-sectional area of a tip of a turbine blade to which the preform is configured to be attached;
- electroplating the squealer tip preform with cubic boron nitride abrasive grains mixed with a nickel and CoNiCrAlY matrix.
A component for a turbine blade, comprising:
- a squealer tip preform configured to be attached to a radially outward tip of the turbine blade usable in a turbine engine, wherein the squealer tip is configured such that an outer surface of the squealer tip preform is generally aligned with an outer side surface of the turbine blade defining a cross-sectional profile of the turbine blade;
- and
- wherein the squealer tip preform is coated with a coating that includes at least one abrasive and wherein the squealer tip is formed separately from a generally elongated blade;
- wherein the squealer tip preform includes cubic boron nitride abrasive particles embedded in a nickel/CoNiCrAlY matrix.
Dependencies are inferred from the claim text.