Centrifugal pump with integrated motor

US6736616B2 · kind B2 · utility

Assignees

• Oliver Laing · DE
• Karsten Laing · DE
• Birger Laing · DE

Inventors

• Karsten Laing · Althütte, DE
• Nikolaus Laing · Spaichingen, DE
• Zoltan Jagasics

Key dates

• Filing date: May 20, 2002
• Grant date: May 18, 2004
• Expiry date: Jul 19, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K2201/18
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A centrifugal pump with an integrally-constructed electrical motor. The motor has a hemi-spherical rotor mounting the impeller and comprising at least two permanent magnetic poles. The rotor is balanced on a spherical bearing including a ball or a hemispherical structure mounted at the end of a shaft engaged into an axial cavity in the smallest end of the rotor. A thin, waterproof and static septum is positioned in the air gap between the stator and the rotor. The annular stator includes a bowl-shaped yoke and a winding, applied to the inner surface of the yoke, comprising segments running in successive alternate sections obliquely to the motor's axis of rotation between the upper and lower rims of the yoke. Due to the geometry of the motor, the residual magnetic forces urge the rotor toward a balanced position against the shaft and bearing.