Verification of magnetic balance for magnetically levitated impeller
US9127680B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2013 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Mar 7, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M60/148
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The magnetic balance is verified of a magnetically-levitated impeller of a centrifugal pump with a pump housing having levitation magnets. The impeller includes embedded magnets and is movable within a chamber in the pump housing between first and second sides of the chamber. The centrifugal pump is mounted on an acceleration fixture while the impeller is held against a predetermined one of the first and second sides by the levitation magnets. A plurality of predetermined accelerations are applied to the acceleration fixture to exert a plurality of different forces of acceleration on the impeller. A determination is made whether the impeller detaches from the predetermined side as a result of each different force of acceleration to identify adjacent forces for which a transition occurs between detaching and not detaching. The transition is compared with a desired retention force to determine whether the pump achieves magnetic balance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.