Bearing

Patent metadata

Field	Value
Publication number	US-9951811-B2
Application number	US-201615131136-A
Country	US
Kind code	B2
Filing date	Apr 18, 2016
Priority date	Apr 18, 2016
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A bearing includes a bearing pad for supporting a rotary component and a housing attached to or formed integrally with the bearing pad. The housing includes a flexible column extending towards the bearing pad for providing the bearing pad with an airflow. The column supports the bearing pad from a location inward of an outer periphery of the bearing pad along an axial direction of the bearing. With such a configuration, a resistance of the bearing pad along a radial direction of the bearing is less at the outer periphery than a resistance of the bearing pad along the radial direction proximate the column.

First claim

What is claimed is:

1. A bearing defining an axial direction and a radial direction, the bearing comprising:
a bearing pad for supporting a rotary component and defining an outer periphery; and
a housing attached to or formed integrally with the bearing pad, the housing comprising a column extending towards the bearing pad for providing the bearing pad with an airflow, the column supporting the bearing pad from a location inward of the outer periphery of the bearing pad along the axial direction such that a resistance of the bearing pad along the radial direction at the outer periphery is less than a resistance of the bearing pad along the radial direction proximate the column.

2. The bearing of claim 1 , wherein the bearing defines a central axis, wherein the rotary component defines a central axis, and wherein the column is configured to pivot to accommodate misalignment of the central axis of the rotary component with the central axis of the bearing.

3. The bearing of claim 1 , wherein the column is a double-walled column defining an inner channel for providing the bearing pad with the airflow.

4. The bearing of claim 1 , wherein the housing defines a first fluid damper cavity and a second fluid damper cavity spaced from the first fluid damper cavity, and wherein the first fluid damper cavity is in flow communication with the second fluid damper cavity through the column.

5. The bearing of claim 4 , wherein the column defines an inner channel and an outer channel, and wherein the first fluid damper cavity is in flow communication with the second fluid damper cavity through the outer channel.

6. The bearing of claim 5 , wherein the outer channel is concentric with the inner channel.

7. The bearing of claim 5 , wherein the outer channel is configured as a clearance gap such that the first fluid damper cavity is in restrictive flow communication with the second fluid damper cavity.

8. The bearing of claim 1 , wherein the bearing pad defines a center along the axial direction, and wherein the column is located approximately at the center of the bearing pad along the axial direction.

9. The bearing of claim 1 , wherein the bearing defines a circumferential direction, wherein the bearing pad defines a center along the circumferential direction, and wherein the column is located approximately at the center of the bearing pad along the circumferential direction.

10. The bearing of claim 1 , wherein the bearing pad comprises an inner surface, wherein the inner surface defines one or more openings in airflow communication with the column.

11. The bearing of claim 1 , wherein the bearing pad and housing are formed integrally of a single, continuous material.

12. The bearing of claim 11 , wherein the bearing pad and housing are formed using an additive manufacturing process.

13. A bearing for a gas turbine engine comprising a rotary component, the bearing comprising:
a bearing pad for supporting the rotary component of the gas turbine engine, the bearing pad defining an outer periphery; and
a housing comprising an inner wall attached to or formed integrally with the bearing pad, the inner wall at least partially forming a column, the column supporting the bearing pad from a location inward of the outer periphery of the bearing pad along the axial direction such that a resistance of the bearing pad along the radial direction at the outer periphery is less than a resistance of the bearing pad along the radial direction proximate the column, and defining a channel for providing the bearing pad with an airflow.

14. The bearing of claim 13 , wherein the bearing defines a central axis, wherein the rotary component defines a central axis, and wherein the column is configured to pivot to accommodate misalignment of the central axis of the rotary component with the central axis of the bearing.

15. The bearing of claim 13 , wherein the bearing defines an axial direction and a circumferential direction, wherein the bearing pad defines a center along the axial direction and the circumferential direction, and wherein the column is located approximately at the center of the bearing pad along the axial direction in the circumferential direction.

16. The bearing of claim 13 , wherein the inner wall is an inner serpentine wall, wherein the housing further comprises an outer serpentine wall attached to or formed integrally with the bearing pad and at least partially defining a first fluid damper cavity, and wherein the outer serpentine wall and the inner serpentine wall together at least partially define a second fluid damper cavity.

17. The bearing of claim 16 , wherein the outer serpentine wall also at least partially defines the column, and wherein the first fluid damper cavity is in flow communication with the second fluid damper cavity through the column.

18. The bearing of claim 16 , wherein the channel defined by the inner serpentine wall is an inner channel, wherein the outer serpentine wall and inner serpentine wall together form the column and together define an outer channel, and wherein the first fluid damper cavity is in flow communication with the second fluid damper cavity through the outer channel.

19. The bearing of claim 18 , wherein the outer channel is concentric with the inner channel.

Assignees

• Gen Electric

Inventors

• Mook Joshua Tyler
• Ertas Bugra Han
• Bellardi Jason Joseph

Classifications

• F16C33/1005

  with gas, e.g. air, as lubricant · CPC title

• F01D25/166

  Sliding contact bearing (gas bearings F01D25/22) · CPC title

• F16C43/02

  Assembling sliding-contact bearings · CPC title

• F16C32/0625

  via supply slits · CPC title

• F16C32/0666

  of bearing pads · CPC title