Electrically driven pump

Abstract

An electrically driven pump having an electric motor designed as a disk rotor. In order to minimize the axial construction length, there is provision for arranging a magnetic ring of the disk rotor on the pump impeller. The integrated design of the motor rotor and pump impeller also makes it possible to balance the unit in one operation.

What is claimed is:  
     
         1 . An electrically driven pump with an electric motor designed as a disk rotor, wherein a magnetic ring of the disk rotor is arranged on the pump impeller.  
     
     
         2 . The pump as claimed in  claim 1 , wherein the magnetic ring is arranged in a region through which fluid flows.  
     
     
         3 . The pump as claimed in  claim 1 , wherein a stator of the electric motor is arranged outside a region of the pump through which fluid flows.  
     
     
         4 . The pump as claimed in  claim 3 , wherein the stator is arranged outside a pump casing.  
     
     
         5 . The pump as claimed in  claim 3 , wherein the stator is arranged in a separate chamber sealed off from the region through which fluid flows.  
     
     
         6 . The pump as claimed in  claim 5 , wherein control and/or power electronics for the electric motor are arranged in the chamber.  
     
     
         7 . The pump as claimed in  claim 1 , wherein the pump is designed as a radial pump with a radial impeller, on a rear side of which the magnetic ring is formed.  
     
     
         8 . The pump as claimed in  claim 1 , wherein the magnetic ring and an adjacent casing wall are designed as a hydrodynamic friction bearing for absorption of axial forces.  
     
     
         9 . The pump as claimed in  claim 1 , further comprising a magnetic bearing for absorbing axial forces is integrated in the electric motor.  
     
     
         10 . The pump as claimed in  claim 1 , wherein the pump impeller is mounted in a pump casing by friction bearings for absorption of radial forces.  
     
     
         11 . The pump as claimed in  claim 1 , wherein the pump is designed as a water pump, air-conditioning compressor, gasoline pump or oil pump.  
     
     
         12 . The pump as claimed in  claim 2 , wherein a stator of the electric motor is arranged outside a region of the pump through which fluid flows.