Motor centrifugal pump

Abstract

The invention relates to a motor centrifugal pump having a plastic-injection-moulded stator core of the electric motor, wherein cooling channels are arranged in the plastic, through which channels the conveying medium flows.

1 . A motor centrifugal pump having a plastic extrusion-coated stator core for the electric motor wherein the plastic is formed with cooling passages through which the pumping medium flows. 
   
   
       2 . The pump according to  claim 1  wherein the cooling passages extend at least partly parallel to the motor axis. 
   
   
       3 . The pump according to  claim 1  wherein at least parts of the cooling passages extend between the motor windings. 
   
   
       4 . The pump according to  claim 1  wherein the cooling passages are connected via one, two, or more passages to the pump chamber conducting the pumping medium. 
   
   
       5 . The pump according to  claim 1  wherein the cooling passages are connected to one another. 
   
   
       6 . The pump according to  claim 1  wherein the cooling passages have no connection to the pump chamber, and form a circuit inside the motor. 
   
   
       7 . The pump according to  claim 1  wherein at least one cooling passage extends past the electronics system of the motor in a closed circuit. 
   
   
       8 . The pump according to  claim 1  wherein the plate for the motor electronics system is mounted on the plastic, close to at least one cooling passage. 
   
   
       9 . The pump according to  claim 1  wherein at least one cooling passage on the side of the motor facing away from the pump impeller is closed off and sealed by a lid-shaped element made of plastic or metal. 
   
   
       10 . The pump according to  claim 9  wherein the plate for the motor electronics system lies against the exterior of the lid-shaped element for cooling. 
   
   
       11 . The pump according to  claim 1  wherein the plastic also forms the split case. 
   
   
       12 . The pump according to  claim 1  wherein the plastic forms the exterior of the motor. 
   
   
       13 . The pump according to  claim 1  wherein the housing for the electronics system is fastened to the plastic. 
   
   
       14 . A method of making a pump according to  claim 1  wherein the plastic is injected into gaps in the stator and forms the cooling passages.