Gas turbine and method for reducing bucket tip shroud creep rate
AssigneeGeneral Electric Company
InventorsJohn P. Urban, Pat Mohr, Emilio Fernandez, Hui Kuang, Robert R. Berry
Life of this patent
Estimating the term…
Abstract
A bucket tip shroud in a gas turbine includes a seal rail having a cutter tooth at one end. Bucket tip shroud creep rate can be reduced by removing the cutter tooth from the bucket tip shroud seal rail after use or with a pre-groove honeycomb shroud. Preferably, the remaining geometry matches a geometry of the seal rail within a predetermined tolerance.
Claims11
A method of reducing a bucket tip shroud creep rate, the bucket tip shroud including a seal rail having a cutter tooth at one end, the method comprising removing the cutter tooth from the bucket tip shroud seal rail.
A turbine comprising a plurality of turbine buckets mounted for rotation with a turbine rotor, each the buckets including a bucket tip shroud with a seal rail, wherein a cutter tooth of a plurality of the bucket seal rails is removed to thereby reduce a bucket tip shroud creep rate.
Dependencies are inferred from the claim text.