Bearing outer race oil supply for thin film fluidic damping

• US 10,228,023 B2
• Filed: 03/22/2016
• Issued: 03/12/2019
• Est. Priority Date: 12/13/2013
• Status: Active Grant

• Current Assignee: Rtx Corporation
• Original Assignee: United Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Clark, Thomas E., Mundell, Eric Charles, Grogg, Gary L.
• Primary Examiner(s): Waits, Alan B
• Application Number:
  US15/076,783
• Publication Number:
  US 20160238075A1
• Time in Patent Office: 1,085 Days
• CPC Class Codes: F01D 25/164 Flexible supports; Vibration damping means associated with the bearing
• CPC Class Codes: F16C 19/26 with a single row of rollers
• CPC Class Codes: F16C 2360/23 Gas turbine engines in general F02C
• CPC Class Codes: F16C 27/045 with a fluid film, e.g. squeeze film damping
• CPC Class Codes: F16C 33/581 integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
• CPC Class Codes: F16C 33/583 Details of specific parts of races
• CPC Class Codes: F16C 33/6659 Details of supply of the liquid to the bearing, e.g. passages or nozzles
• CPC Class Codes: F16C 33/6677 from radial inside, e.g. via a passage through the shaft and/or inner ring
• CPC Class Codes: F16F 15/0237 involving squeeze-film damping

Abstract

An improved film damper oil delivery pathway from an oil reservoir to a thin film fluidic damper is provided. An oil supply tube may be configured to mate to a bearing outer race. The bearing outer race may comprise internal oil flow circuit(s) configured to supply oil from the oil tube to the thin film damper for improved bearing compartment designs.

Claims

1. A method of providing oil to a thin film damper comprising:

coupling a portion of the thin film damper to an oil supply via an inboard film surface, an internal oil flow circuit, and an oil supply tube, wherein the inboard film surface is on a bearing outer race and wherein the internal oil flow circuit is formed internal to the bearing outer race, the inboard film surface facing radially outward on the bearing outer race, the bearing outer race and the inboard film surface being located radially outward from a bearing, the oil supply being located radially inward from the bearing, the bearing being configured to rotate about a bearing axis, wherein the internal oil flow circuit permits oil to flow radially outward from the oil supply tube to the thin film damper, the internal oil flow circuit comprising at least one of a port, a bossed port or a plug, the at least one of the port, the bossed port or the plug being configured to mate with the oil supply tube that is parallel to the bearing axis, wherein another portion of the oil supply tube is inclined relative to the bearing axis wherein the inboard film surface portion of the thin film damper, the internal oil flow circuit, the bearing outer race and the at least one of the port, the bossed port or the plug are formed as a single integral part, the oil supply tube being located at least partially radially inward from the bearing.

2. The method of claim 1, further comprising coupling the oil supply tube to the internal oil flow circuit, wherein the coupling is configured to couple the internal oil flow circuit to the oil supply.

3. The method of claim 2, further comprising positioning a seal between the oil supply tube and the internal oil flow circuit.

4. The method of claim 1, wherein an oil pump is configured to deliver oil from the oil supply to the thin film damper.

5. The method of claim 1, wherein the internal oil flow circuit comprises a plurality of branching oil delivery pathways.

6. The method of claim 1, wherein the bearing outer race is separate part from a bearing housing.

7. A bearing assembly comprising:

a thin film damper positioned between a bearing housing and a bearing outer race, wherein oil is supplied from an oil supply to the thin film damper via an inboard film surface, an internal oil flow circuit, and an oil supply tube, wherein the inboard film surface is on the bearing outer race, the inboard film surface facing radially outward on the bearing outer race, the bearing outer race and the inboard film surface being located radially outward from a bearing, the oil supply being located radially inward from the bearing, the bearing being configured to rotate about a bearing axis, wherein the internal oil flow circuit permits oil to flow radially outward from the oil supply tube to the thin film damper only, wherein the internal oil flow circuit is integral to the bearing outer race, the internal oil flow circuit comprising at least one of a port, a bossed port or a plug, the at least one of the port, the bossed port or the plug being configured to mate with the oil supply tube that is parallel to the bearing axis, wherein another portion of the oil supply tube is inclined relative to the bearing axis wherein the inboard film surface portion of the thin film damper, the internal oil flow circuit, the bearing outer race and the at least one of the port, the bossed port or the plug are formed as a single integral part, the oil supply tube being located at least partially radially inward from the bearing.

8. The bearing assembly of claim 7, further comprising the oil supply tube configured to couple the internal oil flow circuit to an oil supply.

9. The bearing assembly of claim 7, further comprising a seal between the oil supply tube and the internal oil flow circuit.

10. The bearing assembly of claim 7, wherein an oil pump is configured to deliver oil from the oil supply to the thin film damper.

11. The bearing assembly of claim 7, wherein the internal oil flow circuit comprises a plurality of branching oil delivery pathways.

12. The bearing assembly of claim 7, wherein the bearing outer race is a separate part from the bearing housing.

13. The bearing assembly of claim 7, further comprising a rolling bearing.

14. The bearing assembly of claim 7, further comprising a bearing inner race.