Seal assembly with vibration damping bristles

Patent metadata

Field	Value
Publication number	US-10962118-B2
Application number	US-201816155458-A
Country	US
Kind code	B2
Filing date	Oct 9, 2018
Priority date	Oct 9, 2018
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

A seal assembly includes a seal nose, a bellows, and a plurality of bristles. The seal nose is configured to be in sealing contact with a rotating seal plate, the bellows extends between and couples the seal nose to a support structure, and the plurality of bristles extends from the support structure toward the bellows, with at least one bristle of the plurality of bristles being in contact with the bellows to damp vibration of the bellows.

First claim

What is claimed is:

1. A seal assembly comprising:
a seal nose configured to be in sealing contact with a rotating seal plate;
a bellows extending between and coupling the seal nose to a support structure; and
a plurality of bristles mounted to and extending from the support structure toward the bellows, wherein at least one bristle of the plurality of bristles is in contact with the bellows to damp vibration of the bellows;
wherein only respective tips of the plurality of bristles overlap edges of the bellows.

2. The seal assembly of claim 1 , wherein the plurality of bristles are resiliently flexible.

3. The seal assembly of claim 1 , wherein the bellows is resiliently flexible.

4. The seal assembly of claim 1 , further comprising a bristle holder mounted to the support structure, wherein the plurality of bristles is mounted to and extends from the bristle holder.

5. The seal assembly of claim 4 , wherein:
the bellows is an annular structure;
the annular structure of the bellows defines a radial direction, an axial direction, and a circumferential direction;
the plurality of bristles are disposed radially outward of the bellows; and
the respective tips are radially inward tips and the edges are radially outward edges.

6. The seal assembly of claim 5 , wherein each bristle of the plurality of bristles extends radially such that each bristle is parallel to the radial direction.

7. The seal assembly of claim 5 , wherein each bristle of the plurality of bristles extends in a slanted direction relative to the radial direction.

8. The seal assembly of claim 7 , wherein the slanted direction is orthogonal to the axial direction along the length of each bristle.

9. The seal assembly of claim 1 , wherein the plurality of bristles comprises a metallic material.

10. The seal assembly of claim 1 , wherein the plurality of bristles comprises a thermoplastic material.

11. A gas turbine engine having an engine central longitudinal axis, wherein a radial direction, an axial direction, and a circumferential direction are defined relative to the engine central longitudinal axis, the gas turbine engine comprising:
a bearing compartment comprising a rotational member; and
a seal assembly comprising:
a support structure,
a rotating sealing plate;
a seal nose in sealing contact with the rotating seal plate;
a bellows extending between and coupling the seal nose to the support structure; and
a plurality of bristles mounted to and extending from the support structure to engage the bellows, wherein the plurality of bristles are configured to damp vibration of the bellows, wherein only respective tips of the plurality of bristles overlap edges of the bellows.

12. Gas turbine engine of claim 11 , further comprising a bristle holder mounted to the support structure, wherein the plurality of bristles is mounted to and extends from the bristle holder.

13. The gas turbine engine of claim 12 , wherein:
the bellows is annular around the engine central longitudinal axis; and
the plurality of bristles are disposed radially outward of the bellows.

14. The gas turbine engine of claim 13 , wherein each bristle of the plurality of bristles extends radially such that each bristle is parallel to the radial direction.

15. The gas turbine engine of claim 13 , wherein each bristle of the plurality of bristles extends in a slanted direction relative to the radial direction.

16. The gas turbine engine of claim 15 , wherein the slanted direction is orthogonal to the axial direction along the length of each bristle.

17. The gas turbine engine of claim 13 , wherein the plurality of bristles is annular around the engine central longitudinal axis.

18. The gas turbine engine claim 13 , wherein the plurality of bristles comprises multiple sections of bristles that are circumferentially distributed around the engine central longitudinal axis.

19. A method of assembling a gas turbine engine, the method comprising:
mounting a plurality of bristles to a bristle holder;
mounting the bristle holder to a support structure of the gas turbine engine; and
coupling a seal nose to the support structure via a bellows, wherein only respective tips of the plurality of bristles overlap edges of the bellows.

20. The method of claim 19 , wherein mounting the bristle holder to the support structure comprises positioning the bristle holder radially outward of the bellows.

Assignees

• United Technologies Corp
• Raytheon Tech Corp

Inventors

• Duffy Kevin
• Walker Brady

Classifications

• F05D2240/55

  Seals · CPC title

• F05D2240/59

  Lamellar seals · CPC title

• F05D2260/38

  by a spring, i.e. spring loaded or biased towards a certain position · CPC title

• F05D2240/56

  Brush seals · CPC title

• F16J15/366 Primary

  and comprising vibration-damping means · CPC title