Bearing system with bearing damper

Patent metadata

Field	Value
Publication number	US-9752616-B2
Application number	US-201514670661-A
Country	US
Kind code	B2
Filing date	Mar 27, 2015
Priority date	Mar 27, 2015
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A bearing system comprises a bearing configured to be mounted to a shaft. A bearing housing interfaces the bearing to a structure. An annular gap is defined between an outer annular surface of the bearing housing and the structure and configured to receive oil therein. An outlet defined in an outer section surface of the bearing housing is oriented toward a component axially spaced from the bearing. A fluid passageway between the at least one outlet and the annular gap for fluid communication therebetween. In use the fluid passageway directs pressurized oil from the annular gap to the outlet to reach the adjacent component. A method for using oil from a bearing to cool or lubricate a component axially spaced from the bearing is also provided.

First claim

What is claimed is:

1. A bearing system comprising:
a bearing configured to be mounted to a shaft; and
a bearing housing configured to interface the bearing to a structure by being connected to an outer race of the bearing, an annular gap being defined between an outer annular surface of the bearing housing and the structure and configured to receive oil therein, at least one outlet defined in an outer section surface of the bearing housing and oriented toward a component axially spaced from the bearing, and at least one fluid passageway between the at least one outlet and the annular gap for fluid communication therebetween;
whereby in use the at least one fluid passageway directs pressurized oil from the annular gap to the at least one outlet to reach the adjacent component.

2. The bearing system according to claim 1 , wherein the at least one fluid passageway has an annular groove in the outer annular surface of the bearing housing.

3. The bearing system according to claim 2 , wherein the at least one fluid passageway has at least one radial throughbore extending from the annular groove in the outer annular surface of the bearing housing to an inner annular surface thereof, and an axial groove defined in the inner annular surface.

4. The bearing system according to claim 1 , wherein the at least one fluid passageway has at least one radial throughbore extending from the outer annular surface of the bearing housing to an inner annular surface thereof, and an axial groove defined in the inner annular surface.

5. The bearing system according to claim 1 , wherein the bearing housing has a cylindrical body portion comprising the outer annular surface.

6. The bearing system according to claim 4 , wherein the outer race of the bearing and the inner annular surface of the bearing housing are in close-fitting contact to concurrently form a sealed surface for the axial groove.

7. The bearing system according to claim 1 , wherein the annular gap forms a bearing damper in use with oil therein.

8. The bearing system according to claim 1 , further comprising a pair of annular sealing grooves in the outer annular surface of the bearing housing configured to receive annular seals, the annular sealing grooves delimiting the annular gap.

9. The bearing system according to claim 8 , wherein the at least one fluid passageway is in fluid communication with at least one of the pair of annular sealing grooves for pressurizing the annular seal therein against the structure.

10. The bearing system according to claim 8 , wherein one of the annular sealing grooves is in fluid communication with the at least one outlet separately from the at least one passageway.

11. The bearing system according to claim 1 , wherein the outer section surface is an axial end surface of the bearing housing.

12. The bearing system according to claim 1 , wherein the at least one outlet has a counterbore at an end of a conduit of the fluid passageway.

13. An assembly of a bearing system and shaft comprising:
a shaft having a component thereon;
the bearing system according to claim 1 .

Assignees

• Pratt & Whitney Canada
• Pratt & Withney Canada Corp

Inventors

• Saadi Abdelkhalek
• Huppe Roger
• Blais Daniel

Classifications

• F16C2360/23

  Gas turbine engines · CPC title

• F16C33/1065 Primary

  Grooves on a bearing surface for distributing or collecting the liquid · CPC title

• F01D25/16

  Arrangement of bearings; Supporting or mounting bearings in casings (bearings per se F16C) · CPC title

• F16C33/1045

  Details of supply of the liquid to the bearing · CPC title

• F16C33/106

  Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid · CPC title