Mixed tuned hybrid bucket and related method
US6854959B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 2003 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Apr 30, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S416/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A steam turbine rotor wheel includes a plurality of buckets secured about a circumferential periphery of the wheel, each bucket comprising a shank portion and an airfoil portion, the plurality of buckets including two groups of buckets having respective different predetermined resonant frequencies. A method of reducing vibration in a row of buckets on a steam turbine rotor wheel includes a) providing a first group of buckets with a first predetermined natural frequency range; b) providing a second group of buckets with a second predetermined natural frequency range different than the first predetermined natural frequency range; and c) assembling buckets of the first and second groups of buckets in alternating fashion on the rotor wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.