Pump assembly
US10024324B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2012 |
| Grant date | Jul 17, 2018 |
| Priority date | — |
| Expiry date | May 3, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/167
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump assembly includes an electric drive motor having a stator and a permanent magnet rotor, at least one impeller connected to the rotor via a rotor shaft, a thrust bearing accommodating axial forces acting on the impeller and rotor shaft in operation, and at least one radial bearing arranged on the rotor shaft. The rotor and stator are designed such that a magnetic axial force, acting in the direction of the rotation axis of the rotor and acting on the rotor in the direction of the inflow direction into the impeller, is produced between the rotor and the stator. The rotor shaft and rotor are mounted displaceably in the axial direction relative to the stator, and with an axial displacement of the rotor shaft in the inflow direction into the impeller, the bearing surfaces of the radial bearing lying opposite one another at least partly disengage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.