US20080224415A1 - Brush Seal Assembly And Method Of Making - Google Patents
Brush Seal Assembly And Method Of Making Download PDFInfo
- Publication number
- US20080224415A1 US20080224415A1 US12/038,217 US3821708A US2008224415A1 US 20080224415 A1 US20080224415 A1 US 20080224415A1 US 3821708 A US3821708 A US 3821708A US 2008224415 A1 US2008224415 A1 US 2008224415A1
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- US
- United States
- Prior art keywords
- bristles
- support
- bristle pack
- brush seal
- fold
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
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- 238000005304 joining Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims 4
- 238000009958 sewing Methods 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 15
- 239000000919 ceramic Substances 0.000 description 11
- 229920000784 Nomex Polymers 0.000 description 7
- 239000004763 nomex Substances 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229920000271 Kevlar® Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000914 Metallic fiber Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
Images
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 .
- 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 ;
- FIG. 9 is a rear perspective view of the three groups of bristles of FIG. 8 .
- 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. Both KEVLAR® and NOMEX® are synthetic aromatic polyamide polymer manufactured by DuPont. Other suitable polymeric materials may be utilized for the twisted or braided filaments for brush seals, as would be known to those of skill in the art.
- 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 0.001 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 0.036 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 (L P ) 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 (luring 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.
- 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.
Abstract
A bristle pack for use in a brush seal includes a 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.
Description
- This application claims the benefit of U.S. Provisional Application No. 60/894,949, filed Mar. 15, 2007, and the entire disclosure of which is incorporated herein by reference.
- Not Applicable.
- 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.
- The use of brush seals for sealing gaps, such as those found in gas turbine engines, is known in the art. For example, in gas turbine engines 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. As used herein, the system pressure side of the brush seal is referred to as the high pressure side, while 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 abristle pack 1, which is traditionally flexible, and includes a plurality ofbristles 2 for sealing the gap, thebristles 2 having a free end for contacting one component, such as the rotor. Thebristles 2 in the priorart bristle pack 1 are typically secured to asupport 3 by crimping achannel 4 over the thebristles 2. Securing thebristles 2 using theclamping channel 4, such as shown and described in U.S. Pat. No. 4,730,876, is often difficult because thebristles 2 are not secured until theclamping channel 4 is crimped over thesupport 3 andbristles 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.
- These and still other objects and advantages of the present invention will be apparent from the description which follows. In the detailed description below, preferred embodiments of the invention will be described in reference to the accompanying drawings. These embodiments do not represent the full scope of the invention. Rather the invention may be employed in other embodiments. Reference should therefore be made to the claims herein for interpreting the breadth of the invention.
- It should be understood that the drawings are provided for the purpose of illustration only and are not intended to define the limits of the invention. The present invention is not limited to the precise arrangements and instrumentalities shown in the drawings, and the drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles disclosed herein, wherein:
-
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 ofFIG. 2 incorporating the present invention; -
FIG. 4 is a detailed view along line 4-4 ofFIG. 3 ; -
FIG. 5 is a perspective view of a group of bristles ofFIG. 3 ; -
FIG. 6 is a front view of a partially assembly bristle pack ofFIG. 3 ; -
FIG. 7 is a front view of an another embodiment of the bristle pack ofFIG. 2 incorporating the invention; -
FIG. 8 is a front perspective view of three groups of bristles ofFIG. 7 ; and -
FIG. 9 is a rear perspective view of the three groups of bristles ofFIG. 8 . - Referring initially to
FIG. 2 , there is illustrated abrush seal 10 having abristle pack 12 including a plurality ofbristles 14 folded around asupport 16, such as a rod or core. Thebristles 14 wrap around thesupport 16 as shown schematically inFIG. 2 to form thebristle pack 12. In the embodiment shown inFIG. 2 , thebristle pack 12 is mounted in abrush seal housing 18 which can be attached to arotor 26 with thebristles 14 extending radially inwardly engaging arotating shaft 24. Of course, thebrush seal housing 18 can be attached to the rotatingshaft 24 with thebristles 14 engaging therotor 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. Thesupport 16 is formed into any desired shape required for the brush seal application. Although a flexible support is preferred, thesupport 16 can be a rigid frame without departing from the scope of the invention. Most preferably, thesupport 16 does not have any rough edges that can cut or severe thebristles 14 secured thereto. - The
bristles 14 are wrapped or folded over thesupport 16 defining afold 28 at an outer diameter of thesupport 16 when thesupport 16 has a circular shape, such as shown inFIG. 3 .Distal ends 32 of eachbristle 14 extend radially inwardly for engagement with theshaft 24. Of course, if thebrush seal 10 is mounted onto theshaft 24, thebristle folds 28 would be defined at an inner diameter of thecircular support 16 and thedistal ends 32 of thebristles 14 would extend radially outwardly. - The
bristles 14 are secured to thesupport 16 by joining thebristles 14 together adjacent to thesupport 16 opposite of thefold 28. In the embodiment disclosed inFIGS. 3-6 , thebristles 14 are secured onto thesupport 16 by asewn thread 36 which joins thebristles 14 together adjacent thesupport 16 opposite thefolds 28 in thebristles 14. Thethread 36 used to join thebristles 14 can be the same material as thebristles 14 or any other suitable thread, such as cotton, metal, polymer, ceramic, and the like. Thebristles 14 can be grouped or banded together into discrete tufts, as shown inFIGS. 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 inFIG. 1 , or U-ring, may be utilized to further secure thebristles 14 to thesupport 16 by crimping thechannel 4 over the foldedbristles 14. For added security, thebristles 14 may be glued or cemented to the support, as desired. - In one embodiment of the present invention, 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 Nextel™ 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. Both KEVLAR® and NOMEX® are synthetic aromatic polyamide polymer manufactured by DuPont. Other suitable polymeric materials may be utilized for the twisted or braided filaments for brush seals, as would be known to those of skill in the art. - In one embodiment, 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 0.001 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 0.036 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.
- In order to facilitate bending of polymeric fibers during rotor excursions, the fiber strip can be inclined axially in the direction of the fluid flow, toward the low pressure (LP) side. To provide some rigidity, the
flexible bristle pack 12 can be held in an axially inclined position between athinner front plate 44 and backplate 48 which are attached to more rigidfront plate 52 andrigid back plate 54 forming thebrush seal housing 18 as shown inFIG. 2 . Of course, thebristle 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 (luring installation and mishandling. The polymeric brush seal may be attached to the stator housing or to arotor 26 at a first end for an intershaft seal configuration and contactrotating 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. By securing thebristles 14 between axially inclined coned front andback plates plates rigid plates thinner plates bristle pack 12 are minimized. - In the embodiment shown in
FIGS. 3-6 , thebristle pack 12 is made by folding or wrapping thebristles 14 around thesupport 16 until a desired bristle density is achieved. Wrapping or folding thebristles 14 around thesupport 16 forms thefold 28 in each bristle 14. As described above, thebristles 14 can be made out of metals, ceramics, polymers, organic materials or any combination of materials. Thebristles 14 are secured onto thesupport 16 by the sewnthread 36 which joins thebristles 14 together adjacent thesupport 16 opposite thefolds 28 in thebristles 14. - Once the desired length of
bristle pack 12 is achieved, the ends 42 of thesupport 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 thehousing 18, of thebrush seal assembly 10. Preferably, thesupport 16, and thus thebristle pack 12, is formed into a loop or circle. However, thebristle 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. - In another embodiment shown in
FIGS. 7-9 , abristle pack 112 is made by wrappingbristles 114 around asupport 116 forming afold 128 in each bristle 114, as described above. In the embodiment shown inFIGS. 7-9 , ametal clip 132, such as staple, is wrapped, such as by stapling, around a discrete group of thebristles 114. Theclip 132 joins thebristles 114 together adjacent thesupport 116 opposite thefolds 128 in thebristles 114 forming anindividual tuft 144. Anadjacent tuft 114 is formed by anadjacent clip 132 wrapped around an adjacent group ofbristles 114. Advantageously, eachclip 132 quickly and efficiently secures the respective group of bristles to the support. - It will be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be construed as limiting, but merely as exemplifications of preferred embodiments. Those skilled in the art will envision other modifications within the scope, spirit and intent of the invention.
Claims (21)
1. A bristle pack for use in a brush seal comprising:
a support; and
a plurality of bristles folded over said support and defining a fold, said bristles being joined together adjacent said support opposite said fold.
2. The bristle pack as in claim 1 , in which at least some of said bristles are joined together by a sewn thread.
3. The bristle pack as in claim 1 , in which at least some of said bristles are joined together by a clip.
4. The bristle pack as in claim 1 , in which said bristles are metallic.
5. The bristle pack as in claim 1 , in which said bristles are non-metallic.
6. The bristle pack as in claim 1 , in which said support is a flexible wire.
7. The bristle pack as in claim 1 , in which said plurality of bristles are formed into a plurality of groups of bristles, each of said groups of bristles being banded together adjacent said support opposite said fold.
8. The bristle pack of claim 7 , wherein at least one of said groups of bristles is banded by a clip.
9. The bristle pack as in claim 7 , in which at least one of said groups of bristles is banded by a sewn thread.
10. A method of making a bristle pack comprising:
folding a plurality of bristles over a support and forming a fold in each of said bristles; and
joining adjacent bristles together adjacent said support opposite said fold to secure said bristles to said support.
11. The method as in claim 10 , in which joining adjacent bristles together includes attaching a clip to at least some of said bristles.
12. The method as in claim 10 , in which joining adjacent bristles together includes sewing at least some of said bristles together into a group.
13. The method as in claim 10 , including forming said support into a ring.
14. The method as in claim 13 , including joining a first end and a second end of said support together.
15. A brush seal comprising:
a bristle pack including a support and a plurality of bristles folded over said support and defining a fold, said bristles being joined together adjacent said support opposite said fold.
16. The brush seal as in claim 15 , in which at least some of said bristles are joined together by a sewn thread.
17. The brush seal as in claim 15 , in which at least some of said bristles are joined together by a clip.
18. The brush seal as in claim 15 , in which said bristles are metallic.
19. The brush seal as in claim 15 , in which said bristles are non-metallic.
20. The brush seal as in claim 15 , in which said support is a flexible wire.
21. The brush seal as in claim 15 , in which said plurality of bristles are formed into a plurality of groups of bristles, each of said groups being banded together adjacent said support opposite said fold.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/038,217 US20080224415A1 (en) | 2007-03-15 | 2008-02-27 | Brush Seal Assembly And Method Of Making |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US89494907P | 2007-03-15 | 2007-03-15 | |
US12/038,217 US20080224415A1 (en) | 2007-03-15 | 2008-02-27 | Brush Seal Assembly And Method Of Making |
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US20080224415A1 true US20080224415A1 (en) | 2008-09-18 |
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US12/038,217 Abandoned US20080224415A1 (en) | 2007-03-15 | 2008-02-27 | Brush Seal Assembly And Method Of Making |
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US (1) | US20080224415A1 (en) |
EP (1) | EP2137437A2 (en) |
JP (1) | JP2010521230A (en) |
WO (1) | WO2008112432A2 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110049810A1 (en) * | 2009-08-31 | 2011-03-03 | Roger Ferryman | Brush Seal With Stress And Deflection Accommodating Membrane |
US20110272891A1 (en) * | 2009-02-06 | 2011-11-10 | General Electric Company | Systems and Methods and Apparatus Involving Fabricating Brush Seals |
US20120007317A1 (en) * | 2010-07-08 | 2012-01-12 | Beeck Alexander R | Axially angled annular seals |
US20130020770A1 (en) * | 2011-07-18 | 2013-01-24 | Jimmie Wade Hamilton | Brush seal |
US20130313782A1 (en) * | 2012-05-28 | 2013-11-28 | 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 |
US20140301848A1 (en) * | 2011-11-17 | 2014-10-09 | Alstom Renovables España, S.L. | Sealing assembly |
US9206904B2 (en) | 2010-07-08 | 2015-12-08 | Siemens Energy, Inc. | Seal including flexible seal strips |
EP2837859B1 (en) * | 2012-04-08 | 2018-05-16 | Eagle Industry Co., Ltd. | Brush seal |
US20180266261A1 (en) * | 2017-02-27 | 2018-09-20 | Rolls-Royce North American Technologies Inc. | Ceramic seal component for gas turbine engine and process of making the same |
US10330348B2 (en) | 2012-02-17 | 2019-06-25 | David Alan McBay | Closed-loop geothermal energy collection system |
US10458550B2 (en) * | 2014-02-28 | 2019-10-29 | Safran Aircraft Engines | Reduction in the leakage flow rate of a brush seal by flexible geometric obstruction |
US10605491B2 (en) | 2012-02-17 | 2020-03-31 | David Alan McBay | Geothermal energy collection system |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080284107A1 (en) * | 2004-05-04 | 2008-11-20 | Flaherty Andrew L | Ceramic Brush Seals |
WO2008127244A1 (en) | 2007-04-16 | 2008-10-23 | Rexnord Industries Llc | Brush seal |
EP2717741B1 (en) * | 2011-06-07 | 2018-05-02 | Sealeze, A Unit Of Jason Inc. | Quick change brush seal retaining arrangement |
DE102013220168B4 (en) * | 2013-10-07 | 2015-08-27 | MTU Aero Engines AG | Brush seal system for sealing a gap between relatively movable components of a thermal gas turbine |
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Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110272891A1 (en) * | 2009-02-06 | 2011-11-10 | General Electric Company | Systems and Methods and Apparatus Involving Fabricating Brush Seals |
US8925199B2 (en) * | 2009-02-06 | 2015-01-06 | 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 |
US20110049810A1 (en) * | 2009-08-31 | 2011-03-03 | Roger Ferryman | Brush Seal With Stress And Deflection Accommodating Membrane |
US8690158B2 (en) * | 2010-07-08 | 2014-04-08 | Siemens Energy, Inc. | Axially angled annular seals |
US20120007317A1 (en) * | 2010-07-08 | 2012-01-12 | Beeck Alexander R | Axially angled annular seals |
US9206904B2 (en) | 2010-07-08 | 2015-12-08 | Siemens Energy, Inc. | Seal including flexible seal strips |
US20130020770A1 (en) * | 2011-07-18 | 2013-01-24 | Jimmie Wade Hamilton | Brush seal |
US20140301848A1 (en) * | 2011-11-17 | 2014-10-09 | Alstom Renovables España, S.L. | Sealing assembly |
US9759329B2 (en) * | 2011-11-17 | 2017-09-12 | Alstom Renewable Technologies | Sealing assembly |
US11519639B2 (en) | 2012-02-17 | 2022-12-06 | David Alan McBay | Geothermal energy collection system |
US10605491B2 (en) | 2012-02-17 | 2020-03-31 | David Alan McBay | Geothermal energy collection system |
US11131484B2 (en) | 2012-02-17 | 2021-09-28 | David Alan McBay | Geothermal energy collection system |
US10330348B2 (en) | 2012-02-17 | 2019-06-25 | David Alan McBay | Closed-loop geothermal energy collection system |
EP2837859B1 (en) * | 2012-04-08 | 2018-05-16 | Eagle Industry Co., Ltd. | Brush seal |
US20130313782A1 (en) * | 2012-05-28 | 2013-11-28 | 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 |
US10458550B2 (en) * | 2014-02-28 | 2019-10-29 | Safran Aircraft Engines | Reduction in the leakage flow rate of a brush seal by flexible geometric obstruction |
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 |
US20180266261A1 (en) * | 2017-02-27 | 2018-09-20 | Rolls-Royce North American Technologies Inc. | Ceramic seal component for gas turbine engine and process of making the same |
US11255206B2 (en) | 2017-02-27 | 2022-02-22 | Rolls-Royce North American Technologies Inc. | Ceramic seal component for gas turbine engine and process of making the same |
Also Published As
Publication number | Publication date |
---|---|
WO2008112432A2 (en) | 2008-09-18 |
JP2010521230A (en) | 2010-06-24 |
WO2008112432A3 (en) | 2008-10-30 |
EP2137437A2 (en) | 2009-12-30 |
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Owner name: REXNORD INDUSTRIES, LLC, WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FLAHERTY, ANDREW L.;ENGELMANN, RAINER F.;REEL/FRAME:020568/0770 Effective date: 20080225 |
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