Method of forming a trailing edge cutback for a turbine bucket
US6520836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Feb 28, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49995
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The trailing edge of a turbine bucket is cut back from a root portion of the bucket to a location 50-75% of the span of the bucket. The cutback portion is tapered, forming an obtuse angle between it and the remaining original portion of the trailing edge outwardly of the cutback portion. A new conical section is thus created of a slightly larger conical and, hence, transverse configuration. The crack is removed upon removal of the material forming the cutback. With the edges of the recreated conical section surrounded, the cutback portion assumes a scalloped configuration with the exit openings of the cooling holes as seen from opposite sides of the bucket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.