MOTOR CENTRIFUGAL PUMP

• US 20090022610A1
• Filed: 11/29/2006
• Published: 01/22/2009
• Est. Priority Date: 02/23/2006
• Status: Abandoned Application

• Current Assignee: Wilco AG
• Original Assignee: Wilco AG
• Inventors: Materne, Thomas, Strelow, Gunter
• Application Number:
  US12/280,366
• Publication Number:
  US 20090022610A1
• Time in Patent Office: Days
• US Class Current: 417/423.700
• CPC Class Codes: F04D 13/0626 Details of the can
• CPC Class Codes: F04D 13/064 Details of the magnetic circuit
• CPC Class Codes: F04D 29/5806 Cooling the drive system
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 5/128 using air-gap sleeves or air-gap discs
• CPC Class Codes: Y10T 29/49236 Fluid pump or compressor making

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.

Claims

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.