Centrifugal pump with cavitation reducing propeller
US5102297A · kind A · utility
Inventor
Key dates
| Filing date | Aug 8, 1990 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Aug 8, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/242
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A volute type centrifugal pump has an impeller rotatably mounted in a volute chamber of the pump casing adjacent a cutwater within the casing. The impeller includes a hub having a pair of diametrically extending vanes with the outer end portion of each vane being angled in a trailing direction relative to the direction of rotation of the impeller. A semi-cylindrical projection having an axis parallel to the axis of the hub is formed on a trailing surface of each angled portion adjacent an outermost end thereof thereby reducing cavitation on the trailing surface of the impeller to reduce drag and turbulence while increasing pressure on the trailing surface. The surface of the semi-cylindrical projection is roughened to enhance hydraulic jump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.