Method for manufacturing a brush seal with inclined bristle

Patent metadata

Field	Value
Publication number	US-10563769-B2
Application number	US-201715400181-A
Country	US
Kind code	B2
Filing date	Jan 6, 2017
Priority date	Jan 14, 2016
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

The invention relates to a method for manufacturing a brush seal with inclined bristles. In order to be able to manufacture these brush seals in an especially cost-effective manner, at least the following steps are provided: provision of a brush blank with at least one metal thread or wire packing fastened at or in at least one wire core; local, at least partial heating of at least the wire core and/or a subregion of the thread or wire packing adjacent to the wire core, by a current flow through the wire core; bending of the thread or wire packing relative to the wire core for producing of the inclined position of the bristles of the brush seal. The invention further relates to an apparatus for manufacturing brush seals and a brush seal for a turbomachine, in particular for an aircraft engine.

First claim

What is claimed is:

1. A method for manufacturing a brush seal with inclined bristles, comprising at least the steps of:
providing a brush blank with at least one metal thread or wire packing fastened at or in at least one wire core;
locally, at least partial heating of at least the wire core and/or a subregion of the thread or wire packing adjacent to the wire core;
bending the thread or wire packing relative to the wire core for producing the inclined position of the bristles of the brush seal;
wherein the wire core and/or the subregion of the thread or wire packing adjacent to wire core is heated locally at least in part conductively by a current flow through the wire core.

2. The method according to claim 1 , wherein, for local heating, two poles of a power source are contacted electrically at two points that are distant from each other with the wire core and/or with the thread or wire packing by respective contact elements.

3. The method according to claim 1 , wherein, for local conductive heating, an alternating current and/or a direct current is utilized.

4. The method according to claim 1 , wherein, for bending of the thread or wire packing the wire core is held by a first holding device and a subregion of the thread or wire packing that is distanced from the wire core is held by a second holding device, with these two holding devices being shifted in place or twisted relative to each other to produce the inclined position of the bristles.

5. The method according to claim 1 , wherein, as brush blank, a blank in which the metal thread or wire packing is fastened with two opposite-lying end regions, each in or at a wire core is provided, wherein, for bending of the thread or wire packing, the wire cores of the brush blank are held in each case by a holding device and the respective holding devices are shifted in place and/or twisted relative to each other to produce the inclined position of the bristles.

6. The method according to claim 5 , wherein, after bending, the thread or wire packing is severed between the two wire cores.

7. The method according to claim 1 , wherein, during the conductive local heating of the wire core, the subregion of the thread or wire packing adjacent to the wire core is heated by thermal conduction of the wire core.

8. The method according to claim 1 , wherein the wire core is provided as a C-tube element, and the thread or wire packing is heated at least at the exit from the C-tube conductively and/or by thermal conduction.

9. The method according to claim 1 , wherein the brush seal is configured and arranged for use in an aircraft engine.

Assignees

• MTU Aero Engines AG

Inventors

• Gindorf Alexander
• Bamberg Joachim
• Zenzinger Guenter

Classifications

• F16J15/3288

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

• A46D9/00

  Machines for finishing brushes {(A46D1/00 and A46D3/00 take precedence)} · CPC title

• F16J15/328 Primary

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

• A46D3/05

  for fixing the bristles between wires, tapes, or the like · CPC title

• A46B3/08

  by clamping · CPC title