PUMP ASSEMBLY

• US 20110268589A1
• Filed: 02/02/2010
• Published: 11/03/2011
• Est. Priority Date: 02/26/2009
• Status: Active Grant

• Current Assignee: Grundfos Management A/S (POUL DUE Jensen's FOND)
• Original Assignee: Grundfos Management A/S (POUL DUE Jensen's FOND)
• Inventors: Jensen, Jens Sølvstrøm, Mikkelsen, Steen, Jensen, Kim Hulegaard
• Granted Patent: US 8,608,458 B2
• Time in Patent Office: Days
• US Class Current: 417/228
• CPC Class Codes: F04D 13/06 the pump being electrically driven
• CPC Class Codes: F04D 29/5806 Cooling the drive system
• 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

Abstract

A pump assembly includes a pump housing (2) with a fluid entry (6) and a fluid exit (8) for a fluid to be delivered. A stator housing (4) is connected to the pump housing (2). At least one cooling channel (12) is formed in a wall of the stator housing (4) and is connected to cooling channels (22, 24) in the pump housing (2), which are in connection with the fluid entry (6) and the fluid exit (8), so that the fluid flows through the at least one cooling channel on account of the pressure difference between the fluid entry (6) and the fluid exit (8).

Claims

1-10. -10. (canceled)

11. A pump assembly comprises a pump housing (2) having a fluid entry (6) and a fluid exit (8) for a fluid to be delivered, and a stator housing (4) connected to the pump housing (2), at least one cooling channel (12) being formed in a wall of the stator housing (4) and being connected to cooling channels (22, 24) in the pump housing (2), which are in connection with the fluid entry (6) and the fluid exit (8), so that the fluid flows through the at least one cooling channel on account of a pressure difference between the fluid entry (6) and the fluid exit (8).

12. The pump assembly according to claim 11, wherein one of the stator housing (4) and the pump housing (2) includes a first flange (14) and one of the stator housing (4) and the pump housing (2) includes a second flange (20), via which the pump housing (2) and the stator housing (4) are connected to one another, wherein the cooling channels (22, 24) of the pump housing (2) and the at least one cooling channel (12) of the stator housing (4) in each case run out in connection openings (16, 18, 36) in the associated flange (14, 20), and the connection openings (16, 18, 36) in the two flanges (14, 20) lie opposite one another in a manner such that the cooling channels (12, 22, 24) of the stator housing (4) and the pump housing (2) are connected to one another.

13. The pump assembly according to claim 12, wherein at least two of the connection openings (36) are provided in one of the first and the second flange (20), which are connected to a same end of an adjacent cooling channel (22, 24), and are arranged in the flange (20) at different angular positions, in a manner such that the stator housing (4) is connectable to the pump housing (2) in at least two different angular positions, in which in each case at least one of the connection openings (16, 18, 36) of the first and of the second flange lie opposite one another.

14. The pump assembly according to claim 13, wherein at least one of the cooling channels (22, 24) extending in an arched manner in a peripheral direction of the flange (20), is formed in one of the two flanges (20), in which at least one of the cooling channels several connection openings (36) distanced to one another in the peripheral direction are formed.

15. The pump assembly according to claim 14, wherein the cooling channels (22, 24) which in each case extend in an arched manner essentially along an angle of 180°

in the peripheral direction of the flange (20), are formed in one of the two flanges (20), of which one serves for the fluid supply and the other for the fluid discharge, and in which in each case several of the connection openings (36) which are distanced to one another in the peripheral direction of the flange are formed.

16. The pump assembly according to claim 14, wherein at least two of the connection openings (36) which are distanced to one another, are distanced to one another in the peripheral direction of the flange (20) by an angle, which corresponds to an angle between two fastening bolts (30) for the connection of the two flanges (14, 20).

17. The pump assembly according to claim 14, wherein at least one pair of the connection openings (16, 18, 36) is formed in each flange (14, 20), of which one serves for the fluid supply and the other for fluid discharge.

18. The pump assembly according to claim 17, wherein two of the connection openings (16, 18, 36) of the at least one pair of the connection openings are distanced to one another in the peripheral direction of the flange (14, 20) by 180°

.

19. The pump assembly according to claim 17, wherein a number of pairs of the connection openings (36) are arranged in one of the flanges (20), which corresponds to half the possible angular positions, in which the pump housing (2) and the stator housing (4) are connectable to one another.

20. The pump assembly according to claim 11, wherein a temperature-controlled valve (38) is arranged in at least one of the cooling channels.