Francis wheel and hydraulic machine comprising one such wheel
US7220106B2 · kind B2 · utility
4Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2003 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Dec 26, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S416/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A Francis runner that includes a crown, a band and blades which extend between the crown and the band. An angle (β24) between a linear speed (U, D224) of one of the blades and a median of the blade at the trailing edge, has a value between 20 and 25°. As a result, a machine utilizing the Francis runner of the invention is efficient, while an equivalent power under high load is high.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.