Submersible pump and bearing arrangement

Patent metadata

Field	Value
Publication number	US-2016201685-A1
Application number	US-201514982514-A
Country	US
Kind code	A1
Filing date	Dec 29, 2015
Priority date	Jan 13, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

A submersible pump includes a bearing arrangement and a rotor shaft. The bearing arrangement includes a bearing cover, a bearing flange, and one or more bearing elements, each bearing element having an inner bearing ring, an outer bearing ring and a roller element. The rotor shaft is rotatably supported in the one or more bearing element about an axis of rotation extending in a longitudinal axial direction so that the inner bearing ring is configured to rotate along with the rotor shaft in an operating state. The bearing element is arranged at the bearing flange such that the bearing cover tensions each outer bearing ring in a longitudinal axial direction and such that a peripheral gap having a predefined axial width is formed in a radial direction between the outer bearing ring and the bearing cover and between the outer bearing ring and the bearing flange.

First claim

1 . A submersible pump comprising:
a bearing arrangement including a bearing cover, a bearing flange, and one or more bearing elements, each bearing element having an inner bearing ring, an outer bearing ring and a roller element; and a rotor shaft rotatably supported in the one or more bearing element about an axis of rotation extending in a longitudinal axial direction so that the inner bearing ring is configured to rotate along with the rotor shaft in an operating state, the bearing element being arranged at the bearing flange such that the bearing cover tensions each outer bearing ring in a longitudinal axial direction and such that a peripheral gap having a predefined axial width is formed in a radial direction between the outer bearing ring and the bearing cover and between the outer bearing ring and the bearing flange.

2 . A submersible pump in accordance with claim 1 , wherein the peripheral gap is a spark gap for explosion protection.

3 . A submersible pump in accordance with claim 1 , wherein the bearing element is a roller element bearing.

4 . A submersible pump in accordance with claim 1 , wherein
the peripheral gap is a first peripheral gap and a second peripheral gap having a predefinable axial width between the bearing cover and the rotor shaft is formed in the radial direction.

5 . A submersible pump in accordance with claim 1 , wherein the predefined axial width of the peripheral gap is larger than or equal to 5 mm.

6 . A submersible pump in accordance with claim 1 , wherein a radial width of the peripheral gap is larger than or equal to 0.2 mm.

7 . A bearing arrangement for a submersible pump, comprising:
a bearing cover; a bearing flange; and one or more bearing elements, each bearing element having an inner bearing ring, an outer bearing ring and a roller element, the one or more bearing element being configured to rotatably support a rotor shaft about an axis of rotation extending in a longitudinal direction so that the inner bearing ring is capable of rotating along with the rotor shaft in an operating state, the bearing element being arranged at the bearing flange such that the bearing cover tensions each outer bearing ring in a longitudinal axial direction and such that a peripheral gap having a predefined axial width is formed in a radial direction between the outer bearing ring and the bearing cover and between the outer bearing ring and the bearing flange.

8 . A bearing arrangement in accordance with claim 7 , wherein the peripheral gap is formed as a spark gap for explosion protection.

9 . A bearing arrangement in accordance with claim 7 , wherein the bearing element is a roller element bearing.

10 . A bearing arrangement in accordance with claim 7 , wherein the predefined axial width of the peripheral gap is larger than or equal to 5 mm.

11 . A bearing arrangement in accordance with claim 7 , wherein a radial width of the peripheral gap is smaller than or equal to 0.2 mm.

12 . A bearing arrangement in accordance with claim 7 , wherein the peripheral gap is a first peripheral gap and a second peripheral gap having a predefined axial width is formed in the radial direction between the bearing cover and a rotor shaft in an operating state.

13 . A bearing arrangement in accordance with claim 12 , wherein the predefined axial width of the second peripheral gap is larger than or equal to 5 mm.

14 . A bearing arrangement in accordance with claim 12 , wherein a radial width of the second peripheral gap is smaller than or equal to 0.2 mm.

15 . A submersible pump in accordance with claim 1 , wherein the bearing element is one of a ball bearing and a cylinder roller bearing.

16 . A submersible pump in accordance with claim 4 , wherein the predefined axial width of the second peripheral gap is larger than or equal to 5 mm.

17 . A submersible pump in accordance with claim 4 , wherein a radial width of the second peripheral gap is larger than or equal to 0.2 mm.

18 . A submersible pump in accordance with claim 7 , wherein the bearing element is one of a ball bearing and a cylinder roller bearing.

Assignees

• Sulzer Management Ag

Inventors

• Becker Klaus

Classifications

• F16C2360/44

  Centrifugal pumps · CPC title

• F16C35/045

  with a radial flange to mount the housing · CPC title

• F04D29/046

  Bearings · CPC title

• F04D29/041

  Axial thrust balancing · CPC title

• F16C2226/60

  with threaded parts, e.g. bolt and nut connections · CPC title