Systems and methods for split coupled pump and jacking gland

Patent metadata

Field	Value
Publication number	US-10280931-B2
Application number	US-201615008078-A
Country	US
Kind code	B2
Filing date	Jan 27, 2016
Priority date	Jan 27, 2016
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

Embodiments of the invention provide a pump having a motor, a housing, a seal plate coupled to the housing and including a seal plate hub with mounting supports, an impeller arranged within the housing, a coupling assembly coupling a motor shaft and a pump shaft, and a seal and jacking assembly including a mechanical seal and a seal gland. The seal gland is removably coupled to the mounting supports and includes threaded jacking apertures extending axially through the seal gland, each configured to receive a jacking element. When the seal gland is decoupled from the mounting supports, the seal gland is moveable axially between a first position whereat the seal gland engages the mechanical seal and a second position whereat the seal gland engages a retaining ring coupled to the pump shaft in response to rotation of the jacking elements received within the pair of threaded jacking apertures.

First claim

The invention claimed is:

1. A pump comprising:
a motor coupled to a motor shaft;
a pump housing including an inlet and an outlet;
a seal plate coupled to the pump housing and including a seal plate hub protruding from an inner seal plate surface towards the motor, the seal plate hub defining a pump shaft aperture dimensioned to receive a pump shaft and including a plurality of mounting supports each extending radially from a periphery of the seal plate hub;
an impeller arranged within the pump housing and coupled to the pump shaft, the pump shaft defining a pump axis and extending from a first end arranged within the pump housing and coupled to the impeller to a second end protruding from the pump shaft aperture of the seal plate hub;
a coupling assembly removably providing rotational coupling of the motor shaft and the pump shaft;
a seal and jacking assembly including a mechanical seal and a seal gland, the mechanical seal and the seal gland each including a central aperture dimensioned to receive the pump shaft, the seal gland enclosing the pump shaft aperture of the seal plate hub and removably coupled to the plurality of mounting supports of the seal plate hub, the seal gland including a pair of threaded jacking apertures extending axially through the seal gland each configured to receive a jacking element;
wherein when the seal gland is decoupled from the plurality of mounting supports, the seal gland is moveable axially between a first position whereat the seal gland engages the mechanical seal and a second position whereat the seal gland engages a retaining ring coupled to the pump shaft in response to rotation of the jacking elements received within the pair of threaded jacking apertures.

2. The pump of claim 1 , wherein the jacking elements are threaded bolts.

3. The pump of claim 1 , wherein an opposing pair of the plurality of mounting supports define a thickness that is greater than a thickness defined by another opposing pair of the plurality of mounting supports.

4. The pump of claim 3 , wherein the jacking elements engage the opposing pair of the plurality of mounting supports that define a greater thickness to move the seal gland between the first position and the second position.

5. The pump of claim 1 , wherein the seal gland includes an annular disk extending away from the pump axis, a central hub extending substantially perpendicularly from the interior of the annular disk, and a seal lip.

6. The pump of claim 5 , wherein the pair of opposing threaded jacking apertures extend axially through the annular disk.

7. The pump of claim 5 , wherein the central hub of the seal gland extends towards the motor.

8. The pump of claim 5 , wherein the annular disk includes a plurality of fastening recesses formed on a periphery of the annular disk and spaced circumferentially around the periphery of the annular disk.

9. The pump of claim 5 , wherein seal lip extends towards the pump axis from a distal end of the central hub and defines the central aperture of the seal gland.

10. A pump comprising:
a motor coupled to a motor shaft;
a pump housing including an inlet and an outlet;
a seal plate coupled to the pump housing and including a seal plate hub protruding from an inner seal plate surface towards the motor, the seal plate hub defining a pump shaft aperture dimensioned to receive a pump shaft and including a plurality of mounting supports each extending radially from a periphery of the seal plate hub;
an impeller arranged within the pump housing and coupled to the pump shaft, the pump shaft defining a pump axis and extending from a first end arranged within the pump housing and coupled to the impeller to a second end protruding from the pump shaft aperture of the seal plate hub;
a coupling assembly removably providing rotational coupling of the motor shaft and the pump shaft;
a seal and jacking assembly including a mechanical seal, a seal gland, and a jacking plate, the mechanical seal and the seal gland each including a central aperture dimensioned to receive the pump shaft, the seal gland removably coupled to the plurality of mounting supports of the seal plate hub and including a pair of threaded jacking apertures extending axially partially through the seal gland, each of the pair of threaded jacking apertures configured to receive a threaded rod, the threaded rods each configured to receive a jacking element;
a retaining ring arranged on the pump shaft axially between the jacking plate and the second end of the pump shaft;
wherein the jacking elements are selectively rotatable to axially translate the jacking plate, and wherein the selective rotation of the jacking elements is configured to axially translate the jacking plate along the pump shaft from a first position axially between the mechanical seal and the retaining ring to a second position whereat the jacking plate engages the retaining ring.

11. The pump of claim 10 , wherein the jacking elements are wing nuts.

12. The pump of claim 10 , wherein the jacking plate defines a substantially flat shape and is arranged substantially perpendicular to the pump axis.

13. The pump of claim 10 , wherein the jacking plate includes a pair of jacking recesses arranged at opposing ends of the jacking plate and a pump shaft recess arranged in-between the pair of jacking recesses.

14. The pump of claim 13 , wherein the pump shaft recess defines a generally semi-circular shape that includes a radius that is greater than a radius defined by the pump shaft and less than the radius defined by the retaining ring.

15. A pump comprising:
a motor coupled to a motor shaft;
a pump housing including an inlet and an outlet;
a seal plate coupled to the pump housing and including a seal plate hub protruding from an inner seal plate surface towards the motor, the seal plate hub defining a pump shaft aperture dimensioned to receive a pump shaft and including a plurality of mounting supports each extending radially from a periphery of the seal plate hub;
an impeller arranged within the pump housing and coupled to the pump shaft, the pump shaft defining a pump axis and extending from a first end arranged within the pump housing and coupled to the impeller to a second end protruding from the pump shaft aperture of the seal plate hub;
a coupling assembly removably providing rotational coupling of the motor shaft and the pump shaft;
a seal and jacking assembly including a mechanical seal, a seal gland, and a jacking plate, the mechanical seal and the seal gland each including a central aperture dimensioned to receive the pump shaft, the seal gland removably coupled to the plurality of mounting supports of the seal plate hub and including a pair of clearance apertures extending axially partially through the seal gland, each of the pair clearance apertures configured to receive and support a jacking element;
a retaining ring arranged on the pump shaft axially between the jacking plate and the second end of the pump shaft;
wherein the jacking elements are selectively rotatable to axially translate the jacking plate, and wherein the selective rotation of the jacking elements is configured to axially translate the jacking plate along the pump shaft from a first position axially between the mechanical seal and the retaining ring to a second position whereat the jacking plate engages the retaining ring.

16. The pump of claim 15 , wherein the jacking plate includes a pair of flanges arranged at opposing ends of the jacking plate and a centrally raised portion arranged between the pair of flanges.

17. The pump of claim 16 , wherein

Assignees

• Pentair Flow Tech Llc

Inventors

• Prasad Dj Rajendra
• Shorabh Sunny

Classifications

• F04D29/28

  for centrifugal or helico-centrifugal pumps {for radial-flow or helico-centrifugal pumps} · CPC title

• F04D1/00

  Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D7/00; priming or boosting F04D9/00) · CPC title

• F04D29/22

  specially for centrifugal pumps · CPC title

• F04D13/06

  the pump being electrically driven · CPC title

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title