Seal assembly for a turbine engine comprising means for lubricating a brush seal

Patent metadata

Field	Value
Publication number	US-9897212-B2
Application number	US-201414889896-A
Country	US
Kind code	B2
Filing date	May 12, 2014
Priority date	May 13, 2013
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

An assembly forming a seal for a turbine engine, comprising a brush seal formed by a plurality of sealing bristles surrounding a core, a retaining cap comprising a portion at least partially housing the brush seal, and a support cover placed in contact with the brush seal in order to hold it in position against the retaining cap, the brush seal being situated between the retaining cap and the support cover. The support cover comprises a structure for lubricating the bristles of the brush seal, comprising an opening for collecting lubricating oil, a lubricating oil distribution groove connected to the opening, and at least one channel for flow of lubricating oil towards the bristles of the brush seal, connected to the groove.

First claim

What is claimed is:

1. An assembly forming a seal for a turbine engine, comprising:
a brush seal formed by a plurality of sealing bristles surrounding a core;
a retaining cap comprising a relief housing at least a portion of the brush seal; and
a support cover, placed in contact with the brush seal in order to hold it in position against the retaining cap, the brush seal being situated between the retaining cap and the support cover,
wherein the support cover comprises a lubricating arrangement lubricating the bristles of the brush seal, the lubricating arrangement comprising an opening that collects lubricating oil and that continuously extends over at least a quarter of a periphery of the support cover, a groove that distributes the lubricating oil and that is connected to said opening, and a plurality of channels connected to said groove that directs flow of the lubricating oil towards the bristles of the brush seal,
wherein the plurality of channels have at least one of a variable cross section or a variable angular distribution on the periphery of the support cover, such that all of the channels of the plurality of channels provide lubrication of the bristles of the brush seal with a same lubricating oil flow rate.

2. The assembly according to claim 1 , wherein the groove extends over an entirety of the periphery of the support cover.

3. The assembly according to claim 1 , wherein the groove for distributing the lubricating oil is formed radially on the periphery of the support cover, and enclosed by the retaining cap to allow flow of the lubricating oil therein.

4. The assembly according to of claim 1 , wherein the support cover is formed by assembling a first part and a second part, the groove for distributing the lubricating oil being formed on one of the first part and second part and enclosed by the other one of the first part and second part to enable the lubricating oil to flow therein.

5. The assembly according to claim 1 , wherein the assembly comprises an annular closure segment situated between the brush seal and the support cover, the groove for distributing the lubricating oil being formed on the support cover and enclosed by means of the closure segment to enable the lubricating oil to flow therein.

6. A turbine engine, comprising an assembly forming a seal according to claim 1 .

7. A method for manufacturing an assembly forming a seal according to claim 1 .

8. The assembly according to claim 1 , wherein the relief comprises a hollow.

9. The assembly according to claim 1 , wherein the support cover comprises a circular shape, wherein the opening continuously extends over a first quadrant of the support cover, wherein at least one channel of the plurality of the channels is located on a second quadrant the periphery of the support cover, and wherein the second quadrant is opposite the first quadrant.

10. The assembly according to claim 1 , wherein the support cover comprises a circular shape, and wherein at least one channel of the plurality of channels is located in each quadrant of the circular shape of the support cover.

11. An assembly forming a seal for a turbine engine, comprising:
a brush seal formed by a plurality of sealing bristles surrounding a core;
a retaining cap comprising a relief housing at least a portion of the brush seal; and
a support cover, placed in contact with the brush seal in order to hold it in position against the retaining cap, the brush seal being situated between the retaining cap and the support cover,
wherein the support cover comprises a lubricating arrangement lubricating the bristles of the brush seal, the lubricating arrangement comprising an opening that collects lubricating oil and that continuously extends over at least a quarter of a periphery of the support cover, a groove that distributes the lubricating oil and that is connected to said opening, and a plurality of channels connected to said groove that directs flow of the lubricating oil towards the bristles of the brush seal,
wherein the support cover comprises a circular shape, and
wherein at least one channel of the plurality of channels is located in each quadrant of the circular shape of the support cover.

Assignees

• Snecma

Inventors

• Lagarde Romain
• Comin Jean François
• Morreale Rene Serge

Classifications

• F01D11/003 Primary

  by packing rings; Mechanical seals · CPC title

• F05D2240/56

  Brush seals · CPC title

• F16J15/3288 Primary

  Filamentary structures, e.g. brush seals · CPC title

• F02C7/28

  Arrangement of seals · CPC title

• F16J15/328

  Manufacturing methods specially adapted for elastic sealings (moulding B29C) · CPC title