Method for manufacturing brush seals with obliquely positioned bristles and a corresponding device

Patent metadata

Field	Value
Publication number	US-10201845-B2
Application number	US-201615131350-A
Country	US
Kind code	B2
Filing date	Apr 18, 2016
Priority date	May 5, 2015
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

The invention relates to a device and a corresponding method for manufacturing brush seals with obliquely positioned bristles. The method comprises the following steps: As the first step, a metal filament or wire ( 50 ) comprising a material for bristles is wound over two wire cores ( 42, 46 ) disposed at a distance from and running parallel to one another, to form a tightly packed metal filament or wire package ( 48 ). As the next step, the metal filament or wire package ( 48 ) is fastened to at least one wire core ( 42, 46 ). Then the region around at least one of the two wire cores ( 42, 46 ) is locally heated. Subsequently, at least one of the two wire cores ( 42, 46 ) is displaced.

First claim

What is claimed is:

1. A method for manufacturing brush seals with obliquely positioned bristles, comprising the steps of:
a.) winding a metal filament or wire comprising a material for bristles over two wire cores disposed at a distance from and running parallel to one another, to form a tightly packed metal filament or wire package;
b.) fastening the metal filament or wire package to at least one wire core;
c.) local heating of the region around at least one of the two wire cores by at least one induction coil disposed in at least one fastening jaw; and
d.) displacing at least one of the two wire cores so as to obtain a brush seal with obliquely positioned bristles made of the metal bristle material with the tightly packed metal filament or wire package.

2. The method according to claim 1 , wherein the induction coil is driven with a frequency in the eddy current.

3. The method according to claim 1 , wherein, in step b.), the fastening is carried out by welding, bonding, or form-fit joining, and/or in that during the displacement in step d.), a brush seal can be manufactured with both an axial as well as a radial position lay angle in one process step.

4. The method according to claim 1 , wherein, in step b.), the fastening is carried out by crimping at least one clamping strip over at least one wire core.

5. The method according to claim 1 , wherein, after step b.) and before step d.), at least one wire core is fixed to a fastening jaw.

6. The method according to claim 1 , wherein, in step c.), during the heating of the metal filament or wire package, at least one wire core and/or at least one clamping strip is surrounded by a protective gas.

7. The method according to claim 1 , wherein, in step d.), at least one wire core is displaced within a wire plane and/or perpendicular to a wire plane.

8. The method according to claim 1 , wherein, after step d.), the metal filament or wire package, at least one wire core, and/or at least one clamping strip are cooled to room temperature.

9. The method according to claim 1 , wherein, after step d.), the metal filament or wire package disposed between the two wire cores is severed.

Assignees

• MTU Aero Engines AG

Inventors

• Gindorf Alexander
• Huttner Roland
• Fessler-Knobel Martin
• Weber Julian
• Cernay Christoph

Classifications

• A46D1/0207

  Bristles characterised by the choice of material, e.g. metal · CPC title

• B21F3/00

  Coiling wire into particular forms · CPC title

• B21F45/00 Primary

  Wire-working in the manufacture of other particular articles (of pins, needles, nails, hairpins B21G; of chains B21L) · CPC title

• F16J15/3288 Primary

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