Pump and drive bearing for a pump

Patent metadata

Field	Value
Publication number	US-9556877-B2
Application number	US-201313900483-A
Country	US
Kind code	B2
Filing date	May 22, 2013
Priority date	May 22, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A pump for conveying a pump fluid, wherein the pump fluid provided at an inlet pressure at a low pressure side of the pump can be conveyed in the operating state to a high pressure side of the pump rotor by means of a pump rotor rotatably supported about an axis of rotation in a pump stator and wherein a rotor shaft is arranged with the pump rotor at it drive bearing formed as a shaft bearing, characterized in that a lubricating film which is formed from a lubricating fluid formed from the pump fluid can be formed on a drive side of the rotor shaft between the rotor shaft and a drive bearing in a lubricating ring gap, with a lubricant line being provided such that the lubricating fluid can be supplied to the lubricating ring gap between the rotor shaft and the drive bearing.

First claim

The invention claimed is:

1. A multistage pump for conveying a pump fluid, wherein the pump fluid provided at an inlet pressure at a low pressure side (LP) of the pump ( 1 ) can be conveyed in the operating state to a high pressure side (HP) of the pump rotor ( 12 ) by means of a pump rotor ( 12 ) rotatably supported about an axis of rotation (A) in a pump stator ( 11 ) and wherein a rotor shaft ( 13 ) with a drive side and a non-drive side is arranged with the pump rotor ( 12 ) at an additional bearing ( 14 ), which is located on the drive side, whereby the rotor shaft ( 13 ) is supported on the drive side in an outer bearing and can be coupled to the drive by means of a coupling, characterized in that the additional bearing ( 14 ) is arranged between the outer bearing and the pump rotor ( 12 ) and a lubricating film which is formed from a lubricating fluid formed from the pump fluid can be formed on the drive side (AS) of the rotor shaft ( 13 ) between the rotor shaft ( 13 ) and the additional bearing ( 14 ) in a lubricating ring gap ( 15 ), with a lubricant line ( 16 ) being provided such that the lubricating fluid can be supplied to the lubricating ring gap ( 15 ) between the rotor shaft ( 13 ) and the additional bearing ( 14 ).

2. A pump in accordance with claim 1 , wherein the additional bearing ( 14 ) is designed in two parts, including a main bearing ( 141 ) and a pre-bearing ( 142 ).

3. A pump in accordance with claim 2 , wherein a pre-bearing bore ( 1421 ) for supplying the lubricating fluid into a pre-bearing gap ( 1422 ) between the pre-bearing ( 142 ) and the rotor shaft ( 13 ) is provided in the pre-bearing ( 142 ).

4. A pump in accordance with claim 2 , wherein a pre-bearing chamber ( 1423 ) is provided on the drive side in front of the pre-bearing ( 142 ).

5. A pump in accordance with claim 2 , wherein a compensation line ( 1424 ) is provided between a pre-bearing chamber ( 1423 ) and the low pressure side (LP) such that the lubricating fluid can flow from the pre-bearing chamber ( 1424 ) into the low pressure side (LP) in the operating state.

6. A pump in accordance with claim 1 , wherein a lubricant opening ( 161 ) is provided at the high pressure side (HP) and the lubricant opening ( 161 ) is in flow communication with the lubricant line ( 16 ).

7. A pump in accordance with claim 1 , wherein a supply bore ( 144 ) for supplying the lubricating fluid is provided in the additional bearing ( 14 ).

8. A pump in accordance with claim 1 , wherein the lubricating ring gap ( 15 ) and the low pressure side (LP) are in flow communication and wherein the lubricating fluid flows along the rotor shaft ( 13 ) in the direction of the low pressure side (LP).

9. A pump in accordance with claim 1 , wherein a bearing chamber ( 143 ) is provided on the drive side (AS) at the additional bearing ( 14 ), between a main bearing ( 141 ) and a pre-bearing ( 142 ), and the bearing chamber ( 143 ) and the lubricating ring gap ( 15 ) are in flow communication.

10. A pump in accordance with claim 9 , wherein a compensation line ( 145 ) is provided between the bearing chamber ( 143 ) and the low pressure side (LP) such that the lubricating fluid can flow from the bearing chamber ( 143 ) into the low pressure side (LP) in the operating state.

11. A pump in accordance with claim 9 , wherein the lubricating fluid can be supplied to the lubricating ring gap ( 15 ) via the bearing chamber ( 143 ).

12. A pump in accordance with claim 1 , wherein a further lubricant opening ( 161 ) is provided at the high pressure side (HP) of a further pump stage (K) and the further lubricant opening ( 161 ) is in flow communication with the lubricant line ( 16 ).

13. A pump in accordance with claim 1 , wherein the pump ( 1 ) includes an external source for the supply of the lubricating fluid, with the external source not corresponding to a pump stage (K).

Assignees

• Sulzer Pumpen Ag
• Sulzer Management Ag

Inventors

• Meuter Paul
• Welschinger Thomas

Classifications

• F04D29/0473 Primary

  for radial pumps · CPC title

• F04D29/061

  especially adapted for liquid pumps · CPC title

• F04D29/046 Primary

  Bearings · CPC title