MULTISTAGE PUMP ASSEMBLY

• US 20080085185A1
• Filed: 10/08/2007
• Published: 04/10/2008
• Est. Priority Date: 10/10/2006
• Status: Active Grant

• Current Assignee: Grundfos Pumps Corporation (POUL DUE Jensen's FOND)
• Original Assignee: Grundfos Pumps Corporation (POUL DUE Jensen's FOND)
• Inventors: Haack, Ryan, Towsley, Greg, Talley, Joshua, Amdisen, Svend
• Granted Patent: US 7,946,810 B2
• Time in Patent Office: Days
• US Class Current: 415/198.1
• CPC Class Codes: F04D 1/063 of the vertically split casing type
• CPC Class Codes: F04D 29/426 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/4293 Details of fluid inlet or outlet
• CPC Class Codes: F04D 29/605 specially adapted for liquid pumps
• CPC Class Codes: F04D 29/628 especially adapted for liquid pumps
• CPC Class Codes: Y10T 29/53 Means to assemble or disassemble

Abstract

A modular multistage pump assembly includes a volute having a suction side and a pressure side, a pump stack having at least one stage, and a modular flange coupled to each of the volute and the pump stack.

Claims

1. A modular multistage pump assembly comprising:

a volute having a suction chamber and a pressure chamber;

a pump stack having at least one stage; and

a modular flange coupled to each of the volute and the pump stack.

2. A pump assembly in accordance with claim 1, wherein the modular flange is separately provided from each of the volute and the pump stack.

3. A pump assembly in accordance with claim 1, wherein the modular flange defines a suction chamber and a pressure chamber.

4. A pump assembly in accordance with claim 1, wherein the volute comprises a first type and a second type, the modular flange being configured to be coupled to each of the first type and the second type.

5. A pump assembly in accordance with claim 1, wherein the volute comprises a first size and a second size, the modular flange being configured to be coupled to each of the first size and the second size.

6. A pump assembly in accordance with claim 1, wherein the pump stack comprises a first type and a second type, the modular flange being configured to be coupled to each of the first type and the second type.

7. A pump assembly in accordance with claim 1, wherein the pump stack comprises a first size and a second size, the modular flange being configured to be coupled to each of the first size and the second size.

8. A multistage end-suction pump assembly comprising:

a pump stack extending between a volute end and a head end, the pump stack including at least one stage of impellers aligned to rotate about a rotation axis; and

a volute coupled to the volute end of the pump stack, the volute includes an inlet and an outlet being oriented non-parallel with respect to one another.

9. A pump assembly in accordance with claim 8, wherein the inlet is parallel with the rotation axis.

10. A pump assembly in accordance with claim 8, wherein the inlet is oriented in-line with the rotation axis.

11. A pump assembly in accordance with claim 8, wherein the inlet and outlet are oriented perpendicular with respect to one another.

12. A pump assembly in accordance with claim 8, further comprising a modular flange coupled to each of the volute and the pump stack.

13. A pump assembly in accordance with claim 12, wherein the modular flange is separately provided from each of the volute and the pump stack.

14. A pump assembly in accordance with claim 8, wherein the volute includes a transition section extending from the inlet to increase the size of a suction chamber within the volute.

15. A pump assembly in accordance with claim 8, wherein the inlet and the outlet each include an opening, each opening being of substantially the same diameter.

16. A pump assembly in accordance with claim 8, further comprising a pressure fitting coupled to the outlet, the pressure fitting extending between a first end and a second end, the first end being configured to interconnect with a pressure side pipe, and the pressure fitting having an opening extending therethrough.

17. A pump assembly in accordance with claim 8, further comprising:

a shaft extending along the rotating axis and coupled to each of the impellers; and

a motor coupled to the shaft for rotating the shaft about the rotation axis.

18. A pump assembly in accordance with claim 8, wherein the pump stack includes a sleeve defining an outer periphery of the pump stack, the pump assembly further comprising a sleeve flange interconnecting the sleeve and the volute.

19. A pump assembly in accordance with claim 8, further comprising a flange interconnecting the pump stack and the volute, the flange includes concentric rings defining a radially inner channel in direct fluid communication with the inlet and a radially outer channel in direct fluid communication with the outlet.

20. A pump assembly in accordance with claim 8, wherein the pump stack includes at least two stages of diffusers abutting one another to define an axially extending tube, and the pump stack includes an axially extending sleeve being radially spaced outward with respect to the tube, the tube defining a suction channel along the inner portion of the tube and the tube and the sleeve cooperating to define a pressure channel therebetween, the suction channel being in fluid communication with the inlet and the pressure channel being in fluid communication with the outlet.