COOLING ARRANGEMENT OF A PUMP INTENDED FOR PUMPING A LIQUID

• US 20150322966A1
• Filed: 12/02/2013
• Published: 11/12/2015
• Est. Priority Date: 12/14/2012
• Status: Active Grant

• Current Assignee: Xylem Europe GmbH (Xylem, Inc.)
• Original Assignee: Xylem IP Management S.A.R.L. (Xylem, Inc.)
• Inventors: BRATTHLL, Johan
• Granted Patent: US 10,030,670 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F04B 17/03 driven by electric motors
• CPC Class Codes: F04B 53/08 Cooling; Heating; Preventing freezing
• CPC Class Codes: F04D 13/06 the pump being electrically driven
• CPC Class Codes: F04D 13/083 and protected by a gas-bell
• CPC Class Codes: F04D 29/046 Bearings
• CPC Class Codes: F04D 29/086 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/426 especially adapted for liquid pumps
• 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 5/10 with arrangements for protection from ingress, e.g. water or fingers
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02K 9/227 Heat sinks

Abstract

A pump for pumping liquid, the pump including a drive unit and a heat sink arranged to carry off heat that is generated in the drive unit, the drive unit including a motor compartment that in the radial direction is delimited by a motor casing and that accommodates an electric motor having a stator, a coupling compartment that at least partly is delimited by a pump top casing and that accommodates a power supply component, an upper partition that is arranged between the motor compartment and the coupling compartment. The motor casing includes an outer jacket that is connected to and that in the axial direction extends between the upper partition and the heat sink, an inner stator housing that extends between the stator and the heat sink, and a gas filled gap that in the radial direction separates the outer jacket and the inner stator housing.

Claims

1. A pump for pumping liquid, comprising a drive unit and a heat sink connected to said drive unit, which heat sink is arranged to carry off heat that is generated in said drive unit during operation of the pump, the drive unit comprising:

a motor compartment that in the radial direction is delimited by a motor casing and that accommodates an electric motor having a stator,

a coupling compartment that at least partly is delimited by a pump top casing and that accommodates a power supply component,

an upper partition that is arranged between said motor compartment and said coupling compartment, wherein the motor casing comprises;

an outer jacket that is connected to and that in the axial direction extends between the upper partition and the heat sink,

an inner stator housing that extends between the stator and the heat sink, and

a gas filled gap that in the radial direction separates the outer jacket and the inner stator housing.

2. The pump according to claim 1, wherein the heat sink comprises a lower partition, that is arranged between the drive unit and a pump chamber arranged in a hydraulic unit.

3. The pump according to claim 2, wherein the hydraulic unit comprises a pump housing that delimits said pump chamber, said lower partition being fixedly connected to the pump housing.

4. The pump according to claim 2, wherein the inner stator housing is abutting the lower partition.

5. The pump according to claim 1, wherein the heat sink comprises a liquid seal chamber.

6. The pump according to claim 5, wherein t e inner stator housing is adjacent the liquid seal chamber.

7. The pump according to claim 2, wherein the heat sink comprises a liquid se&

chamber that is arranged at the opposite side of the lower partition in relation to said pump chamber.

8. The pump according to claim 2, wherein the pump comprises a drive shaft that is connected to the electric motor and that extends in the axial direction from the motor compartment, through the lower partition and ends in said pump chamber.

9. The pump according to claim 1, wherein the upper partition comprises an upper bearing holder.

10. The pump according to claim 1, wherein the inner stator housing comprises a lower bearing holder.

11. The pump according to claim 1, wherein the upper partition and the outer jacket are fixedly connected to each other.

12. The pump according to claim 1, wherein the power supply component is constituted by a speed control unit that is operatively connected to the stator of the electric motor.