Centrifugal pump with electromagnetic actuator mechanism
US5580215A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1995 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Jan 6, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/146
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electromagnetic seal for a centrifugal pump controls movement of a valve member away from a normally closed position against a sealing surface at the entrance to a reservoir behind the expeller region of the pump, the valve member being controlled by a magnetizable clapper movable within a sealed enclosure toward and away from an electromagnetic coil which may be energized either by the drive motor of the pump or a self-contained generator in the pump driver assembly. Circulation of fluids between the impeller and expeller regions of the pump is enhanced by placement of vents in the impeller and a circumferential groove in the path of flow of fluid through the expeller to create increased turbulence and assist in flushing out foreign particles along with fluid in the expeller region when the pump is in operation. The effectiveness of this combination permits the employment of dry running secondary containment seals which do not require elaborate seal support systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.