SUBMERGED ROTOR ELECTRIC WATER PUMP WITH STRUCTURAL WETSLEEVE

• US 20140017073A1
• Filed: 03/15/2013
• Published: 01/16/2014
• Est. Priority Date: 07/16/2012
• Status: Active Grant

• Current Assignee: Hanon Systems Efp Canada Ltd.
• Original Assignee: Magna Powertrain Incorporated (Magna International Incorporated)
• Inventors: Muizelaar, Richard, Lakerdas, Andrew, Glowacki, Nicholas J., Wang, Liping, Moritz, Dave A., Mills, Kyle
• Granted Patent: US 9,360,015 B2
• Time in Patent Office: Days
• US Class Current: 415/177
• CPC Class Codes: F04D 13/0606 Canned motor pumps
• CPC Class Codes: F04D 13/0626 Details of the can
• CPC Class Codes: F04D 13/0686 Mechanical details of the pump control unit pump control F04D15/00
• CPC Class Codes: F04D 29/026 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/426 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/5813 Cooling the control unit
• CPC Class Codes: F04D 29/588 cooling or heating the machine F04D29/5886, F04D29/5893 take precedence
• CPC Class Codes: F05D 2300/431 Rubber
• CPC Class Codes: H02K 5/128 using air-gap sleeves or air-gap discs

Abstract

An electric pump comprising: a rotor, a wet sleeve surrounding the rotor; and a stator surrounding the wet sleeve and the rotor; wherein the rotor and stator have a magnetic air gap of about 2 mm or less.

Claims

1. An electric pump comprising:

a rotor;

a wet sleeve surrounding the rotor; and

a stator assembled to the wetsleeve, wherein the rotor and stator have a magnetic air gap.

2. The electric pump of claim 1, wherein the rotor is a wet rotor and the stator is attached to the wetsleeve so heat from windings of said stator are dissipated to fluid coolant in contact with said stator.

3. The electric pump of claim 1, wherein the wet sleeve includes:

a cap that is a flanged portion of said wetsleeve;

a sleeve that houses the rotor, and

a seat in communication with a shaft of the rotor so that the seat assists in supporting the shaft.

4. The electric pump of claim 3, wherein the cap extend over the stator so that fluid is prevented from directly contacting the stator.

5. The electric pump any one of claim 3, wherein the pump includes an electronic donut, and the electronic donut is in communication with the cap of the wetsleeve so that fluid assists in cooling the electronic donut and so that fluid is prevented from contacting the electronic donut.

6. The electric pump of claim 1 wherein the electric pump free of an external structural housing.

7. The electric pump of claim 1 further comprising:

a volute, and a volute includes an input and an output so that fluid is circulated through the pump.

8. The electric pump of claim 7, wherein the volute is connected to a boot so that the volute and boot form a cover and the flange portion of said wetsleeve has a piston seal portion for providing a fluid barrier between said volute and said boot.

9. The electric pump of claim 8, wherein the boot is a rubber boot that is attached to the volute via a fixation device so that the pump is sealed.

10. The electric pump of claim 9, wherein the rubber boot is an outermost cover of the pump.

11. The electric pump of any one of claim 7, wherein the volute includes a power supply connection.

12. The electric pump of claim 11, wherein the wetsleeve includes a power adapter configured so that the power supply connection extends through the wetsleeve and is in communication with an electric donut.

13. The electric pump of claim 1, wherein the rotor includes and impeller.

14. The electric pump of claim 1, wherein the wetsleeve is a heat sink.

15. The electric pump of claim 7, wherein the volute is communication with the shaft so that the volute assists in supporting, aligning and retaining the shaft.

16. The electric pump of claim 5 further comprising a thermal medium positioned between said electronic donut and said wetsleeve.

17. An electric pump comprising:

a rotor;

a wetsleeve surrounding the rotor, wherein the wet sleeve comprises;

a cap;

a sleeve that houses the rotor; and

a seat in communication with the shaft of the rotor so that the seat assists in supporting the shaft;

a stator surrounding the wet sleeve and the rotor;

a volute covering an upper portion of the rotor, wet sleeve, and stator; and

a rubber boot covering a lower portion of the rotor, wet sleeve, and stator, wherein the rubber boot is in communication with the volute forming a cover;

wherein the rotor and stator have a magnetic air gap of about 1.5 mm or less.

18. The electric pump of claim 17 further comprising a flange portion of aid wetsleeve having a piston seal portion for providing a fluid barrier between said volute and said boot.

19. The electric pump of claim 17 further comprising an electronic donut positioned in said rubber boot and said wetsleeve, wherein said electronic donut is in contact with said wetsleeve

20. The electric pump of claim 19 further comprising a thermal medium positioned between said electronic donut and said wetsleeve.