Extended housing sleeve with stiffening ring feature

Patent metadata

Field	Value
Publication number	US-2020292003-A1
Application number	US-201916353148-A
Country	US
Kind code	A1
Filing date	Mar 14, 2019
Priority date	Mar 14, 2019
Publication date	Sep 17, 2020
Grant date	—

Abstract

A sleeve for a bearing damper comprising a cylinder shaped body having a forward end opposite an aft end, the body including an interior surface opposite an exterior surface, the body configured insertable between a bearing proximate the interior surface and a housing proximate the exterior surface; a ring portion proximate the forward end, the ring portion having an outer diameter larger than a diameter of the body; and an extension portion configured to provide an active damper surface extending beyond the housing.

First claim

1 . A sleeve for a bearing damper comprising:
a cylinder shaped body having a forward end opposite an aft end, said body including an interior surface opposite an exterior surface, said body configured insertable between a bearing proximate said interior surface and a housing proximate said exterior surface; a ring portion proximate said forward end, said ring portion having an outer diameter larger than a diameter of said body; and an extension portion configured to provide a damper surface extending beyond said housing proximate to the sleeve; and an active damper surface configured to support a damper film length from 5 percent to 15 percent of an outer diameter of the bearing damper.

2 . The sleeve for a bearing damper according to claim 1 , wherein said extension portion provides a sleeve length longer than a housing length.

3 . The sleeve for a bearing damper according to claim 1 , further comprising:
a seal receiver formed in said interior surface proximate said ring portion at said forward end.

4 . The sleeve for a bearing damper according to claim 3 , wherein said seal receiver is configured as a chamfer.

5 . The sleeve for a bearing damper according to claim 3 , wherein said seal receiver is configured to receive an O-ring during installation.

6 . The sleeve for a bearing damper according to claim 1 , wherein said ring portion comprises a thickened cross-section that has a greater thickness than the remainder of the cylinder shaped body of the ring portion configured to stiffen said sleeve proximate said extension portion.

7 . The sleeve for a bearing damper according to claim 1 , further comprising:
a feature formed in said body between the forward end and aft end.

8 . A gas turbine bearing assembly comprising:
a housing proximate a bearing having an oil damper, said bearing supporting a shaft; a sleeve having a cylinder shaped body having a forward end opposite an aft end, said body including an interior surface opposite an exterior surface, said body configured insertable between said bearing proximate said interior surface and said housing proximate said exterior surface; said sleeve including a ring portion proximate said forward end, said ring portion having an outer diameter larger than a diameter of said body; and an extension portion configured to provide a damper surface extending beyond said housing proximate to the sleeve; and an active damper surface configured to support a damper film length from 5 percent to 15 percent of an outer diameter of the bearing damper.

9 . The gas turbine bearing assembly according to claim 8 , wherein said extension portion provides a sleeve length longer than a housing length.

10 . The gas turbine bearing assembly according to claim 8 , further comprising:
a seal receiver formed in said interior surface proximate said ring portion at said forward end.

11 . The gas turbine bearing assembly according to claim 10 , wherein said seal receiver is configured as a chamfer.

12 . The gas turbine bearing assembly according to claim 8 , wherein said ring portion comprises a thickened cross-section that has a greater thickness than the remainder of the cylinder shaped body of the ring portion configured to stiffen said sleeve proximate said extension portion.

13 . The gas turbine bearing assembly according to claim 8 , wherein said ring portion includes a geometry that provides added stiffness to the body, said added stiffness including mechanical properties, configured to prevent thermal or mechanical distortion of the sleeve.

14 . A process for creating an active damper surface extending beyond a housing comprising:
inserting a sleeve between the housing and a bearing mounted within said housing; said sleeve having a cylinder shaped body having a forward end opposite an aft end, said body including an interior surface opposite an exterior surface, said body configured insertable between said bearing proximate said interior surface and said housing proximate said exterior surface; said sleeve including a ring portion proximate said forward end, said ring portion having an outer diameter larger than a diameter of said body; and an extension portion configured to provide a damper surface extending beyond said housing proximate to the sleeve; and an active damper surface configured to support a damper film length from 5 percent to 15 percent of an outer diameter of the bearing damper.

15 . The process of claim 14 , wherein said extension portion provides a sleeve length longer than a housing length.

16 . The process of claim 14 , wherein said sleeve comprises said active damper surface between O-rings, said active damper surface enables an extended interface length of a damper coupled to said bearing proximate said housing.

17 . The process of claim 14 , wherein said ring portion includes cross section that has a greater thickness than the remainder of the body.

18 . The process of claim 14 , further comprising:
a seal receiver formed in said interior surface proximate said ring portion at said forward end.

19 . The process of claim 14 , wherein said ring portion includes a geometry that provides added stiffness to the body, said added stiffness including mechanical properties, configured to prevent thermal or mechanical distortion of the sleeve.

20 . The process of claim 19 , further comprising:
a feature formed in said body between the forward end and the aft end, said feature comprising at least one of an anti-rotation feature, and a clocking feature.

Assignees

• United Technologies Corp

Inventors

• Hegde Aneil S
• Von Berg Kaleb
• Rosen Daniel
• Rafatpanah Ramin M
• Davis Todd A

Classifications

• F16C27/045 Primary

  with a fluid film, e.g. squeeze film damping · CPC title

• F01D25/164

  Flexible supports; Vibration damping means associated with the bearing · CPC title

• F16C33/74

  of sliding-contact bearings · CPC title

• F16C41/00 Primary

  Other accessories, {e.g. devices integrated in the bearing not relating to the bearing function as such} · CPC title

• F16C17/02

  for radial load only · CPC title