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Brush-type circular seal

A technology of brush seals and round brushes, applied in the direction of engine seals, passing components, engine components, etc., can solve problems such as large dimensional tolerances, lack of rotation retention, and lack of compression

Active Publication Date: 2015-05-06
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The designs appearing in WO 2010 / 063269 or FR 2692019 have a common disadvantage: the closure of the C-shaped housing must be achieved by stamping or flow centrifugal casting of the shell, processes that inherently produce large dimensional tolerances
The loss of said compression in operation eg due to uneven expansion would thus imply a loss of said rotation holding

Method used

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  • Brush-type circular seal
  • Brush-type circular seal
  • Brush-type circular seal

Examples

Experimental program
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Embodiment Construction

[0023] The illustrated brush seal is circular about a central axis 23 . Firstly, the brush seal comprises a lower housing 1 (according to the selected representation here for the drawing). The brush seal also comprises a composite structure consisting of a layer of bristles 3 and a core 24 . The core here has a hollow section and consists of a helical metal spring 5 which is wound in a ring around the seal and a metal cover 4 which has a C-shaped open section and which surrounds and protects the spring 5 . Such seals are known and in particular under the trademark Make a sale. The invention in its preferred embodiment incorporates a core; however other embodiments of the core are possible, eg comprising only the cover 4, which provides greater flexibility. The bristle layer 3 has a surrounding portion 20 wound around a core 24 and parallel strands 21 and 22 pointing radially inwards and having a sealing effect. The largest diameter of the winding 20 is referred to as the ...

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PUM

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Abstract

The seal comprises a housing made up of two portions (1, 2) clamped together as a close and fluid tight fit at interfaces (15, 6b) and a composite structure comprising, inside the housing, a core (24) that is advantageously soft and elastic and a winding (20) of brush bristles. This structure extends directly facing the opposing internal faces (9, 10) of the housing, which compresses them and has an arched shape of slightly larger radius of curvature. The composite structure is kept in a precise position firmly but without stress.

Description

technical field [0001] The present invention relates to a circular brush seal generally used for sealing between two pressurized compartments of a turbojet engine (or turbine). Background technique [0002] A turbojet engine has tubular compartments in which different pressures exist. A single rotor shaft passes through these compartments. It is therefore important to provide a seal between the stator (structure of compartments) and the rotor (shaft) when the shaft passes between said compartments. Due to the extreme conditions of this type of environment (high temperature, strong radially non-uniform expansion between rotor and stator), suitable techniques use brush seals such as in WO 2010 / 063269. Brush seals have an adequate level of sealing for this application, are capable of withstanding high temperatures if constructed of suitable materials, and have good tolerance for uneven radial expansion. [0003] In WO 2010 / 063269, the brush seal is constituted in cross-secti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/32
CPCF16L23/22F16J15/3288F16J15/104F16J15/32F16J15/3232F16J15/3252F16J15/3268
Inventor 罗伦·高美弗里德里克·索维尼特奥利维尔·康斯坦特菲利普·雷诺克里斯托弗·门葛艾拉米歇尔·利弗朗索瓦
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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