Moisture removal grooves on steam turbine buckets and covers and methods of manufacture
US7318699B2 · kind B2 · utility
4Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2005 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Jun 27, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2250/193
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Covers on bucket tips are provided with an access slot along a circumferentially facing edge of the cover at a location where moisture removal grooves of the bucket will intersect with the cover. Machine tooling is then applied to form the grooves along the suction side and adjacent the leading of the bucket. The machining runs out through the access slot forming grooves along the side edge of the bucket cover within the slot. The axial extent of the covers overlying leading and trailing edges of the buckets is maintained while enabling moisture removal by centrifugal action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.