Bearing system with a rotary bush and turbomachine

Patent metadata

Field	Value
Publication number	US-10655682-B2
Application number	US-201715853686-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Dec 22, 2016
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

The bearing system includes a fluid bearing, a shaft with a solid portion, and a bush located around the solid portion and in front of pad or pads of the fluid bearing; the bush includes a hollow portion and a plurality of supporting elements that fix the hollow portion of the bush to the solid portion of the shaft.

First claim

The invention claimed is:

1. A bearing system comprising:
a fluid bearing;
a shaft with a solid portion;
a bush located around said solid portion and in front of a pad or pads of the fluid bearing, wherein the bush comprises a hollow portion and a plurality of supporting elements that fix the hollow portion of the bush to the solid portion of the shaft;
a first set of supporting elements located at a first position of the hollow portion and a second set of supporting elements located at a second position of the hollow portion;
an annular chamber defined between the hollow portion of the bush to the solid portion of the shaft,
wherein the supporting elements of the first set and/or of the second set are vanes wherein a lubricant fluid or a heat-exchange fluid flows into or out of said annular chamber.

2. The bearing system of claim 1 , wherein the vanes are shaped and positioned so to establish flow of a heat-exchange fluid during rotation of the shaft from a first side of the fluid bearing to a second side of the fluid bearing.

3. The bearing system of claim 1 , wherein the vanes are shaped and positioned so to establish flow of a lubricant fluid or a heat-exchange fluid during rotation of the shaft from the annular chamber to a first side of the fluid bearing and to a second side of the fluid bearing.

4. The bearing system of claim 3 , wherein the annular chamber is empty of lubricant fluid during rotation of the shaft.

5. The bearing system of claim 3 , wherein the lubricant fluid enters into the annular chamber from a gap between the bush and the pad or pads passing through the hollow portion.

6. The bearing system of claim 1 , wherein the vanes are shaped and positioned so to establish flow of a lubricant fluid or a heat-exchange fluid during rotation of the shaft from a first side of the fluid bearing and/or from a second side of the fluid bearing to the annular chamber.

7. The bearing system of claim 6 , wherein the annular chamber is full of lubricant fluid during rotation of the shaft.

8. The bearing system of claim 6 , wherein the lubricant fluid exits from the annular chamber into a gap between the bush and the pad or pads passing through the hollow portion.

9. A turbomachine comprising at least one bearing system according to claim 1 .

Assignees

• Nuovo Pignone Tecnologie Srl

Inventors

• Bellacci Michelangelo
• Panara Daniele
• Magnasco Marco
• Tozzi Pierluigi

Classifications

• F16C2208/32

  Polytetrafluorethylene [PTFE] (F16C2208/58 takes precedence) · CPC title

• F16C2208/36

  Polyarylene ether ketones [PAEK], e.g. PEK, PEEK (F16C2208/58 takes precedence) · CPC title

• F16C33/206

  with three layers · CPC title

• F16C37/002 Primary

  of fluid bearings · CPC title

• F16C2360/44

  Centrifugal pumps · CPC title