Drum rotor dovetail component and related drum rotor system

摘要

Systems and devices adapted to retain dovetail components (e.g., buckets) in a turbine drum rotor and reduce rotor component displacement are disclosed. In one embodiment, a turbine bucket includes: a bucket base portion shaped to complement a bucket shank slot in a rotor of a turbine, the bucket base portion including: a forward portion shaped to extend upstream of a first stage circumferential slot of the rotor in to a first rotor post of the rotor; a circumferential protrusion formed in an aft end of the bucket base portion and shaped to connect to the rotor, and a set of axial protrusions formed on tangential sides of the bucket base portion and shaped to connect to the rotor; and a bucket platform extending radially outboard from the bucket base portion, the bucket platform configured to complement a vane.

主权项

1. A turbine bucket comprising:
a bucket base portion shaped to complement a corresponding individual axial bucket shank slot in a first rotor post of a turbine rotor, the bucket base portion including: a forward portion shaped to extend axially upstream of a first stage circumferential slot of the rotor into the corresponding individual axial bucket shank slot in the first rotor post; a circumferential protrusion formed in an aft end of the bucket base portion and shaped to connect to a circumferential slot in the rotor, and a set of axial protrusions formed on tangential sides of the bucket base portion and shaped to connect to the corresponding individual axial bucket shank slot in the first rotor post; and a bucket platform extending radially outboard from the bucket base portion, the bucket platform configured to connect to a vane.