WO2008112432A2 - Ensemble de joint d'étanchéité à balai et son procédé de fabrication - Google Patents

Ensemble de joint d'étanchéité à balai et son procédé de fabrication Download PDF

Info

Publication number
WO2008112432A2
WO2008112432A2 PCT/US2008/055129 US2008055129W WO2008112432A2 WO 2008112432 A2 WO2008112432 A2 WO 2008112432A2 US 2008055129 W US2008055129 W US 2008055129W WO 2008112432 A2 WO2008112432 A2 WO 2008112432A2
Authority
WO
WIPO (PCT)
Prior art keywords
bristles
support
bristle pack
brush seal
fold
Prior art date
Application number
PCT/US2008/055129
Other languages
English (en)
Other versions
WO2008112432A3 (fr
Inventor
Andrew L. Flaherty
Rainer F. Engelmann
Original Assignee
Rexnord Industries, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rexnord Industries, Llc filed Critical Rexnord Industries, Llc
Priority to EP08730845A priority Critical patent/EP2137437A2/fr
Priority to JP2009553678A priority patent/JP2010521230A/ja
Publication of WO2008112432A2 publication Critical patent/WO2008112432A2/fr
Publication of WO2008112432A3 publication Critical patent/WO2008112432A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
    • F16J15/3288—Filamentary structures, e.g. brush seals
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
    • E06B7/22—Sealing arrangements on wings or parts co-operating with the wings by means of elastic edgings, e.g. elastic rubber tubes; by means of resilient edgings, e.g. felt or plush strips, resilient metal strips
    • E06B7/23—Plastic, sponge rubber, or like strips or tubes
    • E06B7/2316—Plastic, sponge rubber, or like strips or tubes used as a seal between the floor and the wing

Definitions

  • This invention relates generally to brush seals for sealing a gap between a high pressure and a low pressure area and, more particularly, to a brush seal made from bristles joined together around a support.
  • brush seals for sealing gaps, such as those found in gas turbine engines, is known in the art.
  • brush seals are often utilized to minimize leakage of fluids at circumferential gaps, such as between a machine housing and a rotor, around a rotary shaft of the engine, and between two spaces having different fluid pressure within the engine.
  • the fluid pressure within the system which may be either liquid or gas, is greater than the discharge pressure (the pressure outside the area of the engine housing, toward which the fluid will tend to leak), thus creating a pressure differential in the system.
  • the system pressure side of the brush seal is referred to as the high pressure side
  • the discharge pressure side of the brush seal is referred to as the low pressure side.
  • Known brush seals can be made from metallic or non-metallic fibers.
  • Metallic brush seals typically include fibers made from cobalt or nickel-base high temperature superalloy wire products suitable for elevated temperature operation.
  • Non-metallic brush seals can include fibers made from ceramic or polymeric materials.
  • FIG. 1 shows a portion of a conventional brush seal.
  • Conventional brush seals include a bristle pack 1, which is traditionally flexible, and includes a plurality of bristles 2 for sealing the gap, the bristles 2 having a free end for contacting one component, such as the rotor.
  • the bristles 2 in the prior art bristle pack 1 are typically secured to a support 3 by crimping a channel 4 over the the bristles 2. Securing the bristles 2 using the clamping channel 4, such as shown and described in U.S. Pat. No. 4,730,876, is often difficult because the bristles 2 are not secured until the clamping channel 4 is crimped over the support 3 and bristles 2. As a result, this method of fabrication is time consuming and expensive. Therefore, a need exists for a bristle pack and resulting brush seal that is simple and easy to fabricate.
  • the present invention provides a bristle pack for use in a brush seal, a brush seal, and method of making the bristle pack.
  • the bristle pack includes an elongated support and a plurality of bristles. The bristles are folded over the support defining a fold, and are joined together adjacent the support opposite the fold.
  • a general objective of the present invention is to provide a bristle pack, brush seal, and method of making a bristle pack that is simple and easy to manufacture. This objective is accomplished by providing a bristle pack that includes bristles folded over a support and joined together adjacent the support opposite a fold.
  • FIG. 1 is a perspective view of a mechanically captured prior art brush seal
  • FIG. 2 is a schematic illustration of a brush seal design including a flexible front and back plate mounted in a housing;
  • FIG. 3 is a front view of the bristle pack of FIG. 2 incorporating the present invention.
  • FIG. 4 is a detailed view along line 4-4 of FIG. 3 ;
  • FIG. 5 is a perspective view of a group of bristles of FIG. 3;
  • FIG. 6 is a front view of a partially assembly bristle pack of FIG. 3 ;
  • FIG. 7 is a front view of an another embodiment of the bristle pack of FIG. 2 incorporating the invention;
  • FIG. 8 is a front perspective view of three groups of bristles of FIG. 7; and [0019] FIG. 9 is a rear perspective view of the three groups of bristles of FIG. 8. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • FIG. 2 there is illustrated a brush seal 10 having a bristle pack 12 including a plurality of bristles 14 folded around a support 16, such as a rod or core.
  • the bristles 14 wrap around the support 16 as shown schematically in FIG. 2 to form the bristle pack 12.
  • the bristle pack 12 is mounted in a brush seal housing 18 which can be attached to a rotor 26 with the bristles 14 extending radially inwardly engaging a rotating shaft 24.
  • the brush seal housing 18 can be attached to the rotating shaft 24 with the bristles 14 engaging the rotor 26 without departing from the scope of the invention.
  • the support 16 is preferably a solid or braided core wire formed from a flexible metal.
  • the support 16 is formed into any desired shape required for the brush seal application. Although a flexible support is preferred, the support 16 can be a rigid frame without departing from the scope of the invention. Most preferably, the support 16 does not have any rough edges that can cut or severe the bristles 14 secured thereto.
  • the bristles 14 are wrapped or folded over the support 16 defining a fold 28 at an outer diameter of the support 16 when the support 16 has a circular shape, such as shown in FIG. 3. Distal ends 32 of each bristle 14 extend radially inwardly for engagement with the shaft 24.
  • the bristle folds 28 would be defined at an inner diameter of the circular support 16 and the distal ends 32 of the bristles 14 would extend radially outwardly.
  • the bristles 14 are secured to the support 16 by joining the bristles 14 together adjacent to the support 16 opposite of the fold 28.
  • the bristles 14 are secured onto the support 16 by a sewn thread 36 which joins the bristles 14 together adjacent the support 16 opposite the folds 28 in the bristles 14.
  • the thread 36 used to join the bristles 14 can be the same material as the bristles 14 or any other suitable thread, such as cotton, metal, polymer, ceramic, and the like.
  • the bristles 14 can be grouped or banded together into discrete tufts, as shown in FIGS. 3-6, or into a long continuous strip without departing from the scope of the invention.
  • a clamping channel 4 such as the conventional channel shown in FIG. 1, or U-ring, may be utilized to further secure the bristles 14 to the support 16 by crimping the channel 4 over the folded bristles 14.
  • the bristles 14 may be glued or cemented to the support, as desired.
  • the bristles 14 are formed from twisted or braided ceramic or polymeric filaments of about 0.02-0.05 inches in diameter.
  • the ceramic bristles can be made from suitable high temperature ceramic filaments, including, but not limited to: ceramic oxides such as Aluminum Oxide, Silicon Oxide, Boron Oxide, and NextelTM fiber; Silicon carbide fiber; and other ceramic fibers generally made for ceramic/metal or ceramic/ceramic composites.
  • Polymeric bristles can be made from suitable high temperature polymeric materials, including, but not limited to: KEVLAR® brand filaments for extremely high strength; and NOMEX® filaments for high strength and moderate temperature ( ⁇ 300°C) applications.
  • NOMEX® fibers are preferred because the NOMEX® fibers are generally made into strong fabrics for applications where thermal and flame resistant properties are essential. NOMEX® fibers are very thin, in the range of about 25 micrometers to .001 inches in diameter, and have a low modulus of elasticity.
  • the twisted NOMEX® fibers are much thicker than the individual fibers, the twisted fibers having a thickness in the range of about 900 micrometers to .036 inches in diameter and they are rigid enough to make brush strips using the conventional automatic brush strip manufacturing process. This helps to reduce the fabrication cost of NOMEX® brush strips which will be formed or rolled into brush seal inserts as explained below.
  • the fiber strip can be inclined axially in the direction of the fluid flow, toward the low pressure (Lp) side.
  • the flexible bristle pack 12 can be held in an axially inclined position between a thinner front plate 44 and back plate 48 which are attached to more rigid front plate 52 and rigid back plate 54 forming the brush seal housing 18 as shown in FIG. 2.
  • the bristle pack 12 can be inclined toward the high pressure side, if desired, without departing from the scope of the invention.
  • the flexible plates may extend a predetermined length of the bristles 14 so as to expose only the bristle distal ends 32, and protect the softer polymeric fibers from being damaged during installation and mishandling.
  • the polymeric brush seal may be attached to the stator housing or to a rotor 26 at a first end for an intershaft seal configuration and contact rotating shaft 24 at a second end. For a rotating seal, the stresses in the polymeric fibers resulting from the centrifugal force are minimized as the bristle pack is supported by flexible metallic back plate segments.
  • the metallic segments are designed to withstand the maximum bending stress due to centrifugal force.
  • the bristle pack 12 is made by folding or wrapping the bristles 14 around the support 16 until a desired bristle density is achieved. Wrapping or folding the bristles 14 around the support 16 forms the fold 28 in each bristle 14.
  • the bristles 14 can be made out of metals, ceramics, polymers, organic materials or any combination of materials.
  • the bristles 14 are secured onto the support 16 by the sewn thread 36 which joins the bristles 14 together adjacent the support 16 opposite the folds 28 in the bristles 14.
  • the ends 42 of the support 16 are welded together. Ideally this is a butt weld, but the ends 42 could also be glued or held together by other means.
  • the final assembly of the embodiment disclosed herein is then formed into a hoop and can be assembled into adaptive hardware, such as the housing 18, of the brush seal assembly 10.
  • the support 16, and thus the bristle pack 12 is formed into a loop or circle.
  • the bristle pack 12 can be shaped into any form, such as a square, rectangle, oval, triangle, and the like, without departing from the scope of the invention.
  • a bristle pack 112 is made by wrapping bristles 114 around a support 116 forming a fold 128 in each bristle 114, as described above, hi the embodiment shown in FIGS. 7-9, a metal clip 132, such as staple, is wrapped, such as by stapling, around a discrete group of the bristles 114.
  • the clip 132 joins the bristles 114 together adjacent the support 116 opposite the folds 128 in the bristles 114 forming an individual tuft 144.
  • An adjacent tuft 114 is formed by an adjacent clip 132 wrapped around an adjacent group of bristles 114.
  • each clip 132 quickly and efficiently secures the respective group of bristles to the support.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Brushes (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

Un bloc de poils destiné à être utilisé dans un joint d'étanchéité à balai comprend un support et une pluralité de poils. Les poils sont pliés sur le support définissant un pli, et sont assemblés de manière adjacente au support à l'opposé du pli.
PCT/US2008/055129 2007-03-15 2008-02-27 Ensemble de joint d'étanchéité à balai et son procédé de fabrication WO2008112432A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08730845A EP2137437A2 (fr) 2007-03-15 2008-02-27 Ensemble de joint d'étanchéité à balai et son procédé de fabrication
JP2009553678A JP2010521230A (ja) 2007-03-15 2008-02-27 ブラシシール組立体とその作成方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89494907P 2007-03-15 2007-03-15
US60/894,949 2007-03-15

Publications (2)

Publication Number Publication Date
WO2008112432A2 true WO2008112432A2 (fr) 2008-09-18
WO2008112432A3 WO2008112432A3 (fr) 2008-10-30

Family

ID=39672148

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/055129 WO2008112432A2 (fr) 2007-03-15 2008-02-27 Ensemble de joint d'étanchéité à balai et son procédé de fabrication

Country Status (4)

Country Link
US (1) US20080224415A1 (fr)
EP (1) EP2137437A2 (fr)
JP (1) JP2010521230A (fr)
WO (1) WO2008112432A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008127244A1 (fr) 2007-04-16 2008-10-23 Rexnord Industries Llc Joint-balai
WO2009140187A3 (fr) * 2008-05-14 2010-01-07 Rexnord Industries, Llc Joints brosses en céramique
EP2857721A1 (fr) * 2013-10-07 2015-04-08 MTU Aero Engines GmbH Système de joint balai destiné à étanchéifier une fente entre des composants mobiles les uns par rapport aux autres d'une turbine à gaz thermique

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8051563B2 (en) * 2009-02-06 2011-11-08 General Electric Company Systems and methods and apparatus involving fabricating brush seals
US8505923B2 (en) * 2009-08-31 2013-08-13 Sealeze, A Unit of Jason, Inc. Brush seal with stress and deflection accommodating membrane
US9206904B2 (en) 2010-07-08 2015-12-08 Siemens Energy, Inc. Seal including flexible seal strips
US8690158B2 (en) * 2010-07-08 2014-04-08 Siemens Energy, Inc. Axially angled annular seals
US9068655B2 (en) 2011-06-07 2015-06-30 Sealeze, A Unit Of Jason Inc. Quick change brush seal retaining arrangement
US20130020770A1 (en) * 2011-07-18 2013-01-24 Jimmie Wade Hamilton Brush seal
EP2594790B1 (fr) * 2011-11-17 2015-03-11 ALSTOM Renewable Technologies Ensemble d'étanchéité
US10330348B2 (en) 2012-02-17 2019-06-25 David Alan McBay Closed-loop geothermal energy collection system
US9181931B2 (en) 2012-02-17 2015-11-10 David Alan McBay Geothermal energy collection system
JP5936681B2 (ja) * 2012-04-08 2016-06-22 イーグル工業株式会社 ブラシシール
GB201209389D0 (en) * 2012-05-28 2012-07-11 Rolls Royce Plc Seal and method of forming a seal
US20140008505A1 (en) * 2012-07-06 2014-01-09 Peter H. Rozes Product Support Brush for Shelving
FR3018109B1 (fr) * 2014-02-28 2016-05-06 Snecma Reduction du debit de fuite d'un joint a brosse par obstruction geometrique flexible
US10794205B2 (en) 2017-02-27 2020-10-06 Rolls-Royce North American Technologies Inc. Ceramic seal component for gas turbine engine and process of making the same

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US885032A (en) * 1907-06-24 1908-04-21 Sebastian Ziani De Ferranti Fluid packing.
US2436934A (en) * 1945-04-18 1948-03-02 Niels E Nielsen Bristle tuft and holding bar
DE2623223C3 (de) * 1975-05-30 1978-05-24 Tekken Kensetu Co. Ltd., Tokio Ringspaltdichtung für den Tunnelvortrieb
JPS51140336A (en) * 1975-05-30 1976-12-03 Tekken Constr Co Brush type packing of shield excavator
JPS52107136A (en) * 1976-03-04 1977-09-08 Tekken Constr Co Packing device of shield excavator
JPS58163161U (ja) * 1982-04-23 1983-10-29 中野　操六 ほこり吸着器
DE3606284A1 (de) * 1985-07-31 1987-02-12 Mtu Muenchen Gmbh Verfahren zur herstellung einer buerstendichtung und vorrichtung zur durchfuehrung des verfahrens
GB8712681D0 (en) * 1987-05-29 1987-07-01 Cross Mfg Co 1938 Ltd Brush seals
JPH0344427U (fr) * 1989-09-05 1991-04-25
US5076590A (en) * 1990-11-26 1991-12-31 The United States Of America, As Represented By The Administrator Of The National Aeronautics And Space Administration High temperature, flexible pressure-actuated, brush seal
US5183197A (en) * 1991-08-07 1993-02-02 Technetics Corp. Bundle and place method for the manufacture of brush seals
FR2690493B1 (fr) * 1992-04-23 1996-10-25 Snecma Joint annulaire a brosse.
US5474306A (en) * 1992-11-19 1995-12-12 General Electric Co. Woven seal and hybrid cloth-brush seals for turbine applications
US5425543A (en) * 1993-09-17 1995-06-20 Buckshaw; Dennis J. Seal assembly for rotating shaft
DE29600193U1 (de) * 1996-01-08 1996-03-14 MTU Motoren- und Turbinen-Union München GmbH, 80995 München Bürstendichtung mit C-förmigem Klemmring
US5755445A (en) * 1996-08-23 1998-05-26 Alliedsignal Inc. Noncontacting finger seal with hydrodynamic foot portion
EP0834688B1 (fr) * 1996-10-02 2003-10-22 MTU Aero Engines GmbH Joint à brosses
DE19640979A1 (de) * 1996-10-04 1998-04-16 Asea Brown Boveri Bürstendichtung
DE19712088C2 (de) * 1997-03-22 1999-06-24 Mtu Muenchen Gmbh Bürstendichtung mit in Umfangsrichtung schräg gestellten Borsten
DE19720649C2 (de) * 1997-05-16 2000-09-28 Mtu Muenchen Gmbh Bürstendichtung
US6231047B1 (en) * 1998-05-29 2001-05-15 Eg&G Engineered Products Brush seal
US6257588B1 (en) * 1998-09-22 2001-07-10 General Electric Company Brush seal and rotary machine including such brush seal
GB9821927D0 (en) * 1998-10-08 1998-12-02 Rolls Royce Plc Improved brush seal
GB9930620D0 (en) * 1999-12-24 2000-02-16 Cross Mfg Co Brush seals
US6428009B2 (en) * 2000-04-03 2002-08-06 John F. Justak Robust hydrodynamic brush seal
US6913265B2 (en) * 2000-08-09 2005-07-05 Advanced Components & Materials, Inc. Brush seal assembly, method of manufacture and use
US6644667B2 (en) * 2001-02-23 2003-11-11 Cmg Tech, Llc Seal assembly and rotary machine containing such seal
FR2824378B1 (fr) * 2001-05-03 2003-10-10 Snecma Moteurs Joint a brosses en materiau composite
US6811154B2 (en) * 2003-02-08 2004-11-02 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Noncontacting finger seal
US20040217549A1 (en) * 2003-05-01 2004-11-04 Justak John F. Hydrodynamic brush seal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008127244A1 (fr) 2007-04-16 2008-10-23 Rexnord Industries Llc Joint-balai
EP2147237A1 (fr) * 2007-04-16 2010-01-27 Rexnord Industries, LLC Joint-balai
WO2009140187A3 (fr) * 2008-05-14 2010-01-07 Rexnord Industries, Llc Joints brosses en céramique
EP2857721A1 (fr) * 2013-10-07 2015-04-08 MTU Aero Engines GmbH Système de joint balai destiné à étanchéifier une fente entre des composants mobiles les uns par rapport aux autres d'une turbine à gaz thermique

Also Published As

Publication number Publication date
WO2008112432A3 (fr) 2008-10-30
JP2010521230A (ja) 2010-06-24
US20080224415A1 (en) 2008-09-18
EP2137437A2 (fr) 2009-12-30

Similar Documents

Publication Publication Date Title
US20080224415A1 (en) Brush Seal Assembly And Method Of Making
US20080284107A1 (en) Ceramic Brush Seals
JP5178102B2 (ja) 単一の弾性プレート部材を使用したシャフトシール
USRE30206E (en) Seals and method of manufacture thereof
US20040000760A1 (en) Multi-core brush seal assembly for rotary machines
US20200025293A1 (en) Seal ring
US20110227289A1 (en) Brush seal
WO2004085889A2 (fr) Ensemble joint a brosse et procede de fabrication et d'utilisation correspondant
US20090072486A1 (en) Brush seal
US20120288361A1 (en) Rotating brush seal
JP2004508520A (ja) ブラシシール、該ブラシシールの組立体およびブラシシールを形成する方法
JP4947865B2 (ja) ブラシ形シール
US10280778B2 (en) Assembly for sealing a gap between components of a turbine engine
WO2008004590A1 (fr) Dispositif de scellement de brosse
US9322287B2 (en) Brush seal for turbine
EP2147237A1 (fr) Joint-balai
US20070187900A1 (en) Non-metallic brush seals
EP3431715B1 (fr) Joint à brosse compact
JPH03209068A (ja) ブラシ形シール
US20070069478A1 (en) Leakage seal for gas path of gas turbine
US9784371B2 (en) Brush seal
EP1186812A2 (fr) Dispositif de protection avec maintien de la flexibilité des fibres aux extrémités d'un segment de joint à brosses et procédé de formation
EP3550183B1 (fr) Joint à brosse multi-plan
EP3550184B1 (fr) Joint à brosse multiplans
JP3954468B2 (ja) グランドパッキン材料

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08730845

Country of ref document: EP

Kind code of ref document: A2

WWE Wipo information: entry into national phase

Ref document number: 2009553678

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2008730845

Country of ref document: EP