US20070137039A1 - Methods and apparatus for coupling honeycomb seals to gas turbine engine components - Google Patents
Methods and apparatus for coupling honeycomb seals to gas turbine engine components Download PDFInfo
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- US20070137039A1 US20070137039A1 US11/312,868 US31286805A US2007137039A1 US 20070137039 A1 US20070137039 A1 US 20070137039A1 US 31286805 A US31286805 A US 31286805A US 2007137039 A1 US2007137039 A1 US 2007137039A1
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- Prior art keywords
- seal
- tooling assembly
- track member
- width
- tool
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- 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
- F16J15/44—Free-space packings
- F16J15/444—Free-space packings with facing materials having honeycomb-like structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/246—Fastening of diaphragms or stator-rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/11—Shroud seal segments
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/4932—Turbomachine making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49544—Roller making
- Y10T29/49547—Assembling preformed components
- Y10T29/49549—Work contacting surface element assembled to core
Definitions
- This invention relates generally to gas turbine engines and, more particularly, to methods and apparatus for coupling honeycomb seals to gas turbine engine components.
- Honeycomb seals are widely used in gas turbine engine applications.
- gas turbine engines include at least one row of rotor blades that is radially inward from a plurality of honeycomb seals within cavities formed within a surrounding stator vane assembly.
- At least some known honeycomb materials are installed into a gas turbine engine via a manual crimping process to fixed vane sector components, for example.
- seal teeth located on a first rotatable annular member cut grooves or channels into the honeycomb seals located on a second member having a different rotational speed than that of the first member.
- the channels cut by the seal teeth define an operating clearance between the seal teeth and the honeycomb material, and permit the honeycomb material to substantially prevent air from flowing between the honeycomb material and the first member.
- the seals are manually crimped into the fixed vane sector components using a hammer and a non-marring nylon block that impacts the honeycomb seal. More specifically, often it requires repeated blows from the hammer before the honeycomb seal is fixed in position across the length of the honeycomb seal track. However, repeated hammering across the honeycomb seal track may damage the honeycomb or the seal track, may increase the risk of hammer blow pinch, and/or may limit the useful life expectancy of the honeycomb seal.
- a method for assembling a gas turbine engine includes providing a vane sector and a honeycomb seal. The method also includes coupling the honeycomb seal to the vane sector utilizing a hydraulic tool.
- a tool for assembling a gas turbine engine includes a hydraulic mechanism and a tooling assembly coupled to the hydraulic mechanism.
- the tooling assembly is configured to crimp a honeycomb seal to a vane sector.
- FIG. 1 is a schematic illustration of an exemplary gas turbine engine
- FIG. 2 is a schematic end view of an exemplary stator vane assembly that may be used with the gas turbine engine shown in FIG. 1 ;
- FIG. 3 is a cross-sectional view of a portion of the vane sector shown in FIG. 2 ;
- FIG. 4 is a schematic view of an exemplary tool that may be used to couple a seal to the portion of the vane sector shown in FIG. 3 ;
- FIG. 5 ( a ) is a front perspective view of the tooling assembly that may be used with the tool shown in FIG. 4 ;
- FIG. 5 ( b ) is a rear perspective view of the tooling assembly that may be used with the tool shown in FIG. 4 ;
- FIG. 5 ( c ) is a front view of the tooling assembly that may be used with the tool shown in FIG. 4 ;
- FIG. 6 is a schematic view of the tool shown in FIG. 4 engaged with the portion of the vane sector shown in FIG. 3 .
- FIG. 1 is a schematic illustration of an exemplary gas turbine engine 10 .
- Engine 10 includes a low pressure compressor 12 , a high pressure compressor 14 , and a combustor assembly 16 .
- Engine 10 also includes a high pressure turbine 18 , and a low pressure turbine 20 arranged in a serial, axial flow relationship.
- Compressor 12 and turbine 20 are coupled by a first shaft 24
- compressor 14 and turbine 18 are coupled by a second shaft 26 .
- Compressed air is supplied from low pressure compressor 12 to high pressure compressor 14 .
- Compressed air is then delivered to combustor assembly 16 where it is mixed with fuel and ignited.
- Combustion gases are channeled from combustor 16 to drive turbines 18 and 20 .
- FIG. 2 is a schematic end view of an exemplary stator vane assembly 30 that may be used with gas turbine engine 10 (shown in FIG. 1 ).
- High pressure compressor 14 defines an annular flow path therethrough and includes at least one rotor disk (not shown) that includes a plurality of circumferentially-spaced, rotor blades (not shown) that extend radially outward therefrom.
- Stator vane assembly 30 is coupled adjacent to, and downstream from, the rotor disk.
- stator vane assembly 30 includes six circumferentially-spaced stator vane sectors 32 , wherein each stator vane sector 32 includes sixteen circumferentially-spaced stator vanes 34 .
- Stator vane sectors 32 are coupled circumferentially within engine 10 .
- stator vane assembly 30 includes a total of ninety six stator vanes 34 that are arranged with a substantially uniform circumferential or pitch spacing S 1 defined between each pair of adjacent stator vanes 34 within stator vane assembly 30 .
- each stator vane sector 32 extends arcuately with a radial arc A 1 of approximately 60°.
- Each stator vane sector 32 also includes an inner arc 36 that is radially inward from stator vanes 34 and an outer arc 35 that is radially outward from stator vanes 34 .
- FIG. 3 is a cross-sectional view of a portion of vane sector 32 .
- FIG. 3 illustrates a portion of inner arc 36 including a honeycomb seal 37 inserted therein.
- Inner arc 36 includes a radially inward portion 38 and at least one retaining track member 40 .
- a radially inward surface 42 of portion 38 is coupled adjacent to vane sector stator vanes 34 .
- Retaining track member 40 includes a pair of opposed first portions 46 and a pair of opposed second portions 48 that each extend outwardly from, and are formed integrally with, portion 46 .
- each first portion 46 is substantially perpendicular to inward portion 38 and each second portion 48 is substantially parallel to inward portion 38 .
- retaining track member 40 and portion 38 define a track cavity 52 .
- Seal 37 is a honeycomb seal that is fabricated with a sealing portion 54 and a seal track 56 .
- sealing portion 54 has a width 58 that is narrower than a width 60 of seal track 56 .
- Seal 37 is coupled to inner arc 36 such that at least one retaining track member 40 can be crimped against seal track 56 , as described in more detail below, to facilitate securing seal 37 within vane sector 32 .
- Sealing portion width 58 is narrower than an entrance width 62 of cavity 52 defined between opposed second portions 48 .
- seal track width 60 is narrower than width 64 defined between opposed first portions 46 .
- a height 66 of seal track 56 is shorter than a corresponding height 68 of track cavity 52 as defined by second portions 48 , and as such, sealing track 56 is sized for insertion into track cavity 52 .
- FIG. 4 is a schematic view of an exemplary tool 200 used to couple seal 37 to vane sector 32 (shown in FIG. 3 ), and more specifically to inner arc 36 (shown in FIG. 3 ).
- FIGS. 5 ( a - c ) are each respective views of an exemplary tooling assembly 201 that may be used with tool 200 .
- FIG. 5 ( a ) is a perspective front view of tooling assembly 201
- FIG. 5 ( b ) is a perspective rear view of tooling assembly 201
- FIG. 5 ( c ) is a front view of tooling assembly 201 .
- tool 200 may be a Series PNC Clamp commercially available from by PHD, Inc., Fort Wayne, Ind.
- Tool 200 includes a base 202 that securely couples tool 200 to a fixture, such as a table or a wall.
- base 202 rotatably couples tool 200 to a fixture.
- Tool 200 also includes a body 204 that extends from base 202 .
- a pair of jaws 206 are hingedly secured to body 204 at a distal end 207 of tool 200 .
- Tooling assembly 201 couples to jaws 206 to enable tooling assembly 201 to crimp retaining track members 40 received within jaws 206 .
- tooling assembly 201 includes a first portion 209 and a second portion 210
- jaws 206 include an upper jaw 211 that is configured to couple to first portion 209 and a lower jaw 212 that is configured to couple to second portion 210 .
- Retaining track member second portion 48 is arcuate and is formed with a first radius R 1 and radially inward surface 42 is arcuate and is formed with a second radius R 2 .
- a clamping surface 214 of first portion 209 is formed with a radius R 3 that is approximately one thousandth of a degree less than radius R 1 of retaining track member second portion 48 .
- a clamping surface 216 of second portion 210 is formed with a radius R 4 that is approximately one thousandth of a degree greater than radius R 2 of radially inward surface 42 .
- a first coupling portion 220 of tooling assembly 201 is formed unitarily with tooling assembly first portion 209 , and is sized for insertion into upper jaw 211 .
- a second coupling portion 222 of tooling assembly 201 is formed unitarily with tooling assembly second portion 210 , and sized for insertion into lower jaw 212 .
- First portion clamping surface 214 is arcuate and is formed with a radius R 3 .
- Radius R 3 is approximately one thousandth of a degree less than retaining track member second portion radius R 1 .
- second portion clamping surface 216 is formed with a radius R 4 that is approximately one thousandth of a degree greater than radially inward surface radius R 2 .
- Clamping surfaces 214 and 216 facilitate accommodating the varying radii between retaining track member second portion 48 and radially inward surface 42 .
- clamping surface 216 is disposed at, and closes at, an angle ⁇ to facilitate preventing distortion of inner arc 36 .
- a second portion front surface 226 is taller than a second portion rear surface 228 , such that clamping surface 216 slopes away from front surface 226 towards rear surface 228 at an angle ⁇ .
- Tooling assembly second portion 210 also includes a pair of flanges 229 that extend outward from a front surface 226 of tooling assembly second portion 210 .
- Flanges 229 facilitate supporting vane sector 32 while inserted into tooling assembly 201 .
- FIG. 6 is a schematic view of tool 200 engaged with a portion of vane sector 32 .
- first portion 209 engages retaining track member second portion 48 and tooling assembly second portion 210 engages radially inward portion 38 .
- retaining track member second portion 48 is crimped to an angle ⁇ defined by retaining track member first portion 46 .
- angle ⁇ is between approximately 30-60°.
- honeycomb seal 37 is secured within vane sector 32
- honeycomb seal 37 Prior to operating tool 200 , honeycomb seal 37 is inserted into vane sector 32 such that seal track 56 is retained in track cavity 52 , and is positioned between retaining track member second portion 48 and radially inward portion 38 .
- a section of vane sector 32 is inserted into tool 200 such that tooling assembly first portion 209 engages retaining track member second portion 48 and tooling assembly second portion 210 engages radially inward surface 42 .
- Vane sector 32 is then supported by positioning radially inward portion 38 upon flanges 229 .
- foot pedal 217 is a five-way two-position pedal which actuates a pneumatic valve (not shown). Foot pedal 217 enables an operator to switch tool 200 between powered closed and power open cycles. Foot pedal 217 also allows an operator to open or close jaws 206 while leaving both hands free to manipulate vane sector 32 .
- foot pedal 217 the operator selects a first position of foot pedal 217 to operate the power close cycle of tool 200 .
- foot pedal 217 By depressing foot pedal 217 the user can begin crimping seal 37 to vane sector 32 .
- a pneumatic or hydraulic differential motor housed within body 204 , drives a piston (not shown) attached to a mechanical linkage (not shown).
- the tool may be driven by other means, including, but not limited to, an electric motor. Both the piston and the mechanical linkage are also housed within body 204 . Driving the mechanical linkage closes jaws 206 to facilitate closing tooling assembly 201 upon vane sector 32 .
- tooling assembly first portion 209 engages retaining track member second portion 48 and tooling assembly second portion 210 engages radially inward portion 38 .
- Tooling assembly first portion 209 moves downward towards tooling assembly second portion 210 , during which time, tooling assembly 201 forces retaining track member second portion 48 into contact with seal track 56 of honeycomb seal 37 .
- seal track 56 is secured between retaining track member 40 and radially inward portion 38 to facilitate securing honeycomb seal 37 within vane sector 32 .
- tooling assembly 201 is designed to account for the varying radii between retaining track member second portion 48 and radially inward surface 42 to facilitate preventing bending moments from being placed on vane sector 32 which would crack the brittle braze joints which hold vane sector 32 together. Tooling assembly 201 also facilitates preventing undesirable marring of vane sector 32 . Moreover, the angled closing of tooling assembly first portion 209 prevents distortion of inner arc 36 .
- the operator uses a second position of foot pedal 217 to operate tool 200 in an open cycle.
- the open cycle drives the motor in an opposite direction of the powered closing cycle, causing the mechanical linkage to open jaws 206 .
- jaws 206 are opened, the operator removes the first section of vane sector 32 and selects a second section of vane sector 32 , adjacent the first section, to have a seal crimped therein.
- the second section of vane sector 32 is inserted into tooling assembly 201 in the same fashion as the first section.
- the crimping process is repeated. The operator repeats these steps until the entire length of retaining track member 40 has been closed in contact with the entire length of seal track 56 .
- the above-described methods and apparatus allow an operator to efficiently crimp a honeycomb seal onto a vane sector of a gas turbine engine.
- the efficiency of crimping is increased, in comparison to known honeycomb seal attachment means, because the need for a ball peen hammer and a non-marring block is eliminated by the present invention.
- the likelihood of errors and the amount of physical effort that must be exerted by an operator are each facilitated to be reduced.
- the above-described tool enables a more uniform honeycomb seal to be crimped into a vane sector without abnormal stresses to the brittle brazed joints.
- the present invention provides a more reliable and less costly alternative to known honeycomb crimping methods.
Abstract
A method for assembling a gas turbine engine is provided. The method includes providing a vane sector and a honeycomb seal. The method further includes coupling the honeycomb seal to the vane sector utilizing a hydraulic tool.
Description
- This invention relates generally to gas turbine engines and, more particularly, to methods and apparatus for coupling honeycomb seals to gas turbine engine components.
- Honeycomb seals are widely used in gas turbine engine applications. For example, at least some known gas turbine engines include at least one row of rotor blades that is radially inward from a plurality of honeycomb seals within cavities formed within a surrounding stator vane assembly. At least some known honeycomb materials are installed into a gas turbine engine via a manual crimping process to fixed vane sector components, for example. During break-in engine operations, seal teeth located on a first rotatable annular member cut grooves or channels into the honeycomb seals located on a second member having a different rotational speed than that of the first member. The channels cut by the seal teeth define an operating clearance between the seal teeth and the honeycomb material, and permit the honeycomb material to substantially prevent air from flowing between the honeycomb material and the first member.
- During assembly of at least some known honeycomb seals, the seals are manually crimped into the fixed vane sector components using a hammer and a non-marring nylon block that impacts the honeycomb seal. More specifically, often it requires repeated blows from the hammer before the honeycomb seal is fixed in position across the length of the honeycomb seal track. However, repeated hammering across the honeycomb seal track may damage the honeycomb or the seal track, may increase the risk of hammer blow pinch, and/or may limit the useful life expectancy of the honeycomb seal.
- In one aspect, a method for assembling a gas turbine engine is provided. The method includes providing a vane sector and a honeycomb seal. The method also includes coupling the honeycomb seal to the vane sector utilizing a hydraulic tool.
- In another aspect, a tool for assembling a gas turbine engine is provided. The tool includes a hydraulic mechanism and a tooling assembly coupled to the hydraulic mechanism. The tooling assembly is configured to crimp a honeycomb seal to a vane sector.
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FIG. 1 is a schematic illustration of an exemplary gas turbine engine; -
FIG. 2 is a schematic end view of an exemplary stator vane assembly that may be used with the gas turbine engine shown inFIG. 1 ; -
FIG. 3 is a cross-sectional view of a portion of the vane sector shown inFIG. 2 ; -
FIG. 4 is a schematic view of an exemplary tool that may be used to couple a seal to the portion of the vane sector shown inFIG. 3 ; -
FIG. 5 (a) is a front perspective view of the tooling assembly that may be used with the tool shown inFIG. 4 ; -
FIG. 5 (b) is a rear perspective view of the tooling assembly that may be used with the tool shown inFIG. 4 ; -
FIG. 5 (c) is a front view of the tooling assembly that may be used with the tool shown inFIG. 4 ; and -
FIG. 6 is a schematic view of the tool shown inFIG. 4 engaged with the portion of the vane sector shown inFIG. 3 . -
FIG. 1 is a schematic illustration of an exemplarygas turbine engine 10.Engine 10 includes alow pressure compressor 12, ahigh pressure compressor 14, and acombustor assembly 16.Engine 10 also includes ahigh pressure turbine 18, and alow pressure turbine 20 arranged in a serial, axial flow relationship.Compressor 12 andturbine 20 are coupled by afirst shaft 24, andcompressor 14 andturbine 18 are coupled by asecond shaft 26. - In operation, air flows through
low pressure compressor 12 from anupstream side 28 ofengine 10. Compressed air is supplied fromlow pressure compressor 12 tohigh pressure compressor 14. Compressed air is then delivered tocombustor assembly 16 where it is mixed with fuel and ignited. Combustion gases are channeled fromcombustor 16 to driveturbines -
FIG. 2 is a schematic end view of an exemplarystator vane assembly 30 that may be used with gas turbine engine 10 (shown inFIG. 1 ).High pressure compressor 14 defines an annular flow path therethrough and includes at least one rotor disk (not shown) that includes a plurality of circumferentially-spaced, rotor blades (not shown) that extend radially outward therefrom.Stator vane assembly 30 is coupled adjacent to, and downstream from, the rotor disk. In the exemplary embodiment,stator vane assembly 30 includes six circumferentially-spacedstator vane sectors 32, wherein eachstator vane sector 32 includes sixteen circumferentially-spaced stator vanes 34.Stator vane sectors 32 are coupled circumferentially withinengine 10. Accordingly, in the exemplary embodiment,stator vane assembly 30 includes a total of ninety sixstator vanes 34 that are arranged with a substantially uniform circumferential or pitch spacing S1 defined between each pair ofadjacent stator vanes 34 withinstator vane assembly 30. In the exemplary embodiment, eachstator vane sector 32 extends arcuately with a radial arc A1 of approximately 60°. Eachstator vane sector 32 also includes aninner arc 36 that is radially inward fromstator vanes 34 and anouter arc 35 that is radially outward fromstator vanes 34. -
FIG. 3 is a cross-sectional view of a portion ofvane sector 32. Specifically,FIG. 3 illustrates a portion ofinner arc 36 including ahoneycomb seal 37 inserted therein.Inner arc 36 includes a radiallyinward portion 38 and at least oneretaining track member 40. A radiallyinward surface 42 ofportion 38 is coupled adjacent to vanesector stator vanes 34. Retainingtrack member 40 includes a pair of opposedfirst portions 46 and a pair of opposedsecond portions 48 that each extend outwardly from, and are formed integrally with,portion 46. In the exemplary embodiment, eachfirst portion 46 is substantially perpendicular toinward portion 38 and eachsecond portion 48 is substantially parallel toinward portion 38. Accordingly retainingtrack member 40 andportion 38 define atrack cavity 52. - Seal 37 is a honeycomb seal that is fabricated with a sealing
portion 54 and aseal track 56. In the exemplary embodiment, sealingportion 54 has awidth 58 that is narrower than awidth 60 ofseal track 56.Seal 37 is coupled toinner arc 36 such that at least one retainingtrack member 40 can be crimped againstseal track 56, as described in more detail below, to facilitate securingseal 37 withinvane sector 32.Sealing portion width 58 is narrower than anentrance width 62 ofcavity 52 defined between opposedsecond portions 48. Moreover,seal track width 60 is narrower thanwidth 64 defined between opposedfirst portions 46. In addition, aheight 66 ofseal track 56 is shorter than acorresponding height 68 oftrack cavity 52 as defined bysecond portions 48, and as such, sealingtrack 56 is sized for insertion intotrack cavity 52. -
FIG. 4 is a schematic view of anexemplary tool 200 used to coupleseal 37 to vane sector 32 (shown inFIG. 3 ), and more specifically to inner arc 36 (shown inFIG. 3 ). FIGS. 5(a-c) are each respective views of anexemplary tooling assembly 201 that may be used withtool 200.FIG. 5 (a) is a perspective front view oftooling assembly 201,FIG. 5 (b) is a perspective rear view oftooling assembly 201, andFIG. 5 (c) is a front view oftooling assembly 201. In one embodiment,tool 200 may be a Series PNC Clamp commercially available from by PHD, Inc., Fort Wayne, Ind.Tool 200 includes abase 202 that securely couplestool 200 to a fixture, such as a table or a wall. In an alternative embodiment,base 202rotatably couples tool 200 to a fixture.Tool 200 also includes abody 204 that extends frombase 202. A pair ofjaws 206 are hingedly secured tobody 204 at adistal end 207 oftool 200.Tooling assembly 201 couples tojaws 206 to enabletooling assembly 201 to crimp retainingtrack members 40 received withinjaws 206. Specifically,tooling assembly 201 includes afirst portion 209 and asecond portion 210, andjaws 206 include anupper jaw 211 that is configured to couple tofirst portion 209 and alower jaw 212 that is configured to couple tosecond portion 210. - Retaining track member
second portion 48 is arcuate and is formed with a first radius R1 and radiallyinward surface 42 is arcuate and is formed with a second radius R2. In one embodiment, a clampingsurface 214 offirst portion 209 is formed with a radius R3 that is approximately one thousandth of a degree less than radius R1 of retaining track membersecond portion 48. Furthermore, a clampingsurface 216 ofsecond portion 210 is formed with a radius R4 that is approximately one thousandth of a degree greater than radius R2 of radiallyinward surface 42. - In the exemplary embodiment, a
first coupling portion 220 oftooling assembly 201 is formed unitarily with tooling assemblyfirst portion 209, and is sized for insertion intoupper jaw 211. Similarly, asecond coupling portion 222 oftooling assembly 201 is formed unitarily with tooling assemblysecond portion 210, and sized for insertion intolower jaw 212. - First
portion clamping surface 214 is arcuate and is formed with a radius R3. Radius R3 is approximately one thousandth of a degree less than retaining track member second portion radius R1. Furthermore, secondportion clamping surface 216 is formed with a radius R4 that is approximately one thousandth of a degree greater than radially inward surface radius R2. Clamping surfaces 214 and 216 facilitate accommodating the varying radii between retaining track membersecond portion 48 and radiallyinward surface 42. Moreover, clampingsurface 216 is disposed at, and closes at, an angle θ to facilitate preventing distortion ofinner arc 36. Specifically a secondportion front surface 226 is taller than a second portionrear surface 228, such that clampingsurface 216 slopes away fromfront surface 226 towardsrear surface 228 at an angle θ. - Tooling assembly
second portion 210 also includes a pair offlanges 229 that extend outward from afront surface 226 of tooling assemblysecond portion 210.Flanges 229 facilitate supportingvane sector 32 while inserted intotooling assembly 201. -
FIG. 6 is a schematic view oftool 200 engaged with a portion ofvane sector 32. During use tooling assemblyfirst portion 209 engages retaining track membersecond portion 48 and tooling assemblysecond portion 210 engages radiallyinward portion 38. Asfirst portion 209 is moved downward towards tooling assemblysecond portion 210, retaining track membersecond portion 48 is crimped to an angle β defined by retaining track memberfirst portion 46. In one embodiment angle β is between approximately 30-60°. Assecond portion 48 is crimped againstseal track 56,honeycomb seal 37 is secured withinvane sector 32 - Prior to operating
tool 200,honeycomb seal 37 is inserted intovane sector 32 such thatseal track 56 is retained intrack cavity 52, and is positioned between retaining track membersecond portion 48 and radiallyinward portion 38. A section ofvane sector 32 is inserted intotool 200 such that tooling assemblyfirst portion 209 engages retaining track membersecond portion 48 and tooling assemblysecond portion 210 engages radiallyinward surface 42.Vane sector 32 is then supported by positioning radiallyinward portion 38 uponflanges 229. - In the exemplary embodiment,
tool 200 is activated using afoot pedal 217. In the exemplary embodiment,foot pedal 217 is a five-way two-position pedal which actuates a pneumatic valve (not shown).Foot pedal 217 enables an operator to switchtool 200 between powered closed and power open cycles.Foot pedal 217 also allows an operator to open orclose jaws 206 while leaving both hands free to manipulatevane sector 32. - Using
foot pedal 217, the operator selects a first position offoot pedal 217 to operate the power close cycle oftool 200. By depressingfoot pedal 217 the user can begin crimpingseal 37 tovane sector 32. In the exemplary embodiment, a pneumatic or hydraulic differential motor (not shown), housed withinbody 204, drives a piston (not shown) attached to a mechanical linkage (not shown). In an alternative embodiment, the tool may be driven by other means, including, but not limited to, an electric motor. Both the piston and the mechanical linkage are also housed withinbody 204. Driving the mechanical linkage closesjaws 206 to facilitateclosing tooling assembly 201 uponvane sector 32. - Specifically, tooling assembly
first portion 209 engages retaining track membersecond portion 48 and tooling assemblysecond portion 210 engages radiallyinward portion 38. Tooling assemblyfirst portion 209 moves downward towards tooling assemblysecond portion 210, during which time,tooling assembly 201 forces retaining track membersecond portion 48 into contact withseal track 56 ofhoneycomb seal 37. Accordingly,seal track 56 is secured between retainingtrack member 40 and radiallyinward portion 38 to facilitate securinghoneycomb seal 37 withinvane sector 32. - The radii of tooling assembly first
portion clamping surface 214 and tooling assembly secondportion clamping surface 216 allowfirst portion 209 andsecond portion 210 to maintain substantially congruent lines of contact upon both retaining track membersecond portion 48 and radiallyinward portion 38. Specifically,tooling assembly 201 is designed to account for the varying radii between retaining track membersecond portion 48 and radiallyinward surface 42 to facilitate preventing bending moments from being placed onvane sector 32 which would crack the brittle braze joints which holdvane sector 32 together.Tooling assembly 201 also facilitates preventing undesirable marring ofvane sector 32. Moreover, the angled closing of tooling assemblyfirst portion 209 prevents distortion ofinner arc 36. - After retaining
track member 40 has been crimped uponseal track 56, the operator uses a second position offoot pedal 217 to operatetool 200 in an open cycle. The open cycle drives the motor in an opposite direction of the powered closing cycle, causing the mechanical linkage to openjaws 206. Whenjaws 206 are opened, the operator removes the first section ofvane sector 32 and selects a second section ofvane sector 32, adjacent the first section, to have a seal crimped therein. The second section ofvane sector 32 is inserted intotooling assembly 201 in the same fashion as the first section. Using the foot pedal the crimping process is repeated. The operator repeats these steps until the entire length of retainingtrack member 40 has been closed in contact with the entire length ofseal track 56. The process is then repeated on the opposite side ofvane sector 32 to close the opposing side of retainingtrack member 40 ontoseal track 56. When both sides of retainingtrack member 40 have been closed ontoseal track 56 along the entire length ofinner arc 36,seal 37 will be properly secured tovane sector 32. - The above-described methods and apparatus allow an operator to efficiently crimp a honeycomb seal onto a vane sector of a gas turbine engine. The efficiency of crimping is increased, in comparison to known honeycomb seal attachment means, because the need for a ball peen hammer and a non-marring block is eliminated by the present invention. As such, the likelihood of errors and the amount of physical effort that must be exerted by an operator are each facilitated to be reduced. Furthermore, the above-described tool enables a more uniform honeycomb seal to be crimped into a vane sector without abnormal stresses to the brittle brazed joints. By reducing the potential for error and decreasing the time required to crimp a vane sector, the present invention provides a more reliable and less costly alternative to known honeycomb crimping methods.
- As used herein, an element or step recited in the singular and proceeded with the word “a” or “an” should be understood as not excluding plural said elements or steps, unless such exclusion is explicitly recited. Furthermore, references to “one embodiment” of the present invention are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features.
- Although the methods and systems described herein are described in the context of crimping a honeycomb seal to the vane sector of a gas turbine engine, it is understood that the crimping methods and systems described herein are not limited to honeycomb seals or gas turbine engines. Likewise, the crimping tool components illustrated are not limited to the specific embodiments described herein, but rather, components of the crimping tool can be utilized independently and separately from other components described herein.
- While the invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.
Claims (18)
1. A method for assembling a gas turbine engine, said method comprising:
providing a vane sector;
providing a honeycomb seal; and
coupling the honeycomb seal to the vane sector utilizing a hydraulic tool.
2. A method in accordance with claim 1 further comprising providing a honeycomb seal including a sealing portion and a seal track, wherein the sealing portion has a first width and the seal track has a second width that is different than the sealing portion first width.
3. A method in accordance with claim 1 further comprising providing a honeycomb seal including a sealing portion and a seal track that is formed unitarily with the sealing portion, wherein the sealing portion has a first width and the seal track has a second width that is wider than the sealing portion first width.
4. A method in accordance with claim 1 wherein providing a vane sector further comprises providing a vane sector including a radially lower portion and at least one retaining track member coupled to the radially lower portion, wherein the at least one retaining track member includes a first portion that is substantially perpendicular to the radially lower portion and a second portion that is substantially perpendicular to the first portion and is substantially parallel to the radially lower portion.
5. A method in accordance with claim 4 further comprising:
providing a honeycomb seal including a sealing portion and a seal track formed unitarily with the sealing portion, wherein the sealing portion has a first width and the seal track has a second width that is wider than the sealing portion first width; and
inserting the seal track into a cavity defined by the at least one retaining track member and the radially lower portion.
6. A method in accordance with claim 5 further comprising crimping the at least one retaining track member using the hydraulic tool to facilitate positioning the retaining track member second portion at an acute angle relative to the retaining track member first portion and such that the retaining track member second portion contacts the seal track.
7. A method in accordance with claim 5 wherein the hydraulic tool includes a tooling assembly including a first portion and a second portion, said method further comprises:
coupling the tooling assembly first portion to the retaining track member second portion;
coupling the tooling assembly second portion to the vane sector radially lower portion; and
crimping the retaining track member with the hydraulic tool.
8. A method in accordance with claim 1 further comprising utilizing a foot pedal to control operation of the hydraulic tool.
9. A method in accordance with claim 8 wherein the vane sector lower portion is formed with a first radius and the retaining track member second portion is formed with a second radius, the tooling assembly first portion is formed with a radius less than the retaining track member second portion radius and the tooling assembly second portion is formed with a radius greater than the vane sector radially lower portion radius, said method further comprising coupling the tooling assembly first portion to the retaining track member second portion and coupling the tooling assembly second portion to the vane sector radially lower portion to facilitate crimping the at least one retaining track member onto the seal track with the hydraulic tool to facilitate securing the seal within the vane sector.
10. A tool for assembling a gas turbine engine, said tool comprising:
a hydraulic mechanism; and
a tooling assembly coupled to said hydraulic mechanism, said tooling assembly configured to crimp a honeycomb seal to a vane sector.
11. A tool in accordance with claim 10 wherein said honeycomb seal further comprises a sealing portion and a seal track, wherein said sealing portion has a first width and said seal track has a second width that is different than said sealing portion first width, said tooling assembly configured to crimp said seal track to the vane sector.
12. A tool in accordance with claim 10 wherein said honeycomb seal further comprises a sealing portion and a seal track, wherein said sealing portion has a first width and said seal track has a second width that is wider than said sealing portion first width, said tooling assembly configured to crimp said seal track to the vane sector.
13. A tool in accordance with claim 10 wherein the vane sector further comprises a radially lower portion and at least one retaining track member coupled to said radially lower portion, wherein said at least one retaining track member includes a first portion coupled substantially perpendicular to said radially lower portion and a second portion coupled substantially perpendicular to said first portion and substantially parallel to said radially lower portion, said tooling assembly configured to crimp said at least one retaining track member such that said retaining track member second portion is positioned at an acute angle relative to the retaining track member first portion.
14. A tool in accordance with claim 13 wherein the seal is a honeycomb seal including a sealing portion and a seal track that is formed unitarily with said sealing portion, wherein said sealing portion has a first width and said seal track has a second width that is wider than said sealing portion first width; said seal track configured to be inserted into a cavity defined by said at least one retaining track member and said radially lower portion, said tooling assembly configured to crimp said at least one retaining track member such that said retaining track member second portion makes contact with said seal track.
15. A tool in accordance with claim 14 wherein said tooling assembly further comprises a first portion and a second portion, wherein said tooling assembly first portion is configured to engage said retaining track member second portion and said tooling assembly second portion is configured to engage said vane sector radially lower portion, such that said tooling assembly first portion and said tooling assembly second portion crimp said retaining track member second portion towards said vane sector radially lower portion.
16. A tool in accordance with claim 15 wherein said vane sector radially lower portion is formed with a first radius and said retaining track member second portion is formed with a second radius, said tooling assembly first portion further comprising a radius configured to engage said retaining track member radius, and said tooling assembly second portion further comprising a radius configured to engage said vane sector radially lower portion radius.
17. A tool in accordance claim 10 wherein said tooling assembly further comprises at least one flange configured to support the vane sector.
18. A tool in accordance with claim 10 further comprising a foot pedal operatively coupled to said hydraulic tool such that utilizing said foot pedal controls said hydraulic tool.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/312,868 US20070137039A1 (en) | 2005-12-20 | 2005-12-20 | Methods and apparatus for coupling honeycomb seals to gas turbine engine components |
EP06126632A EP1801358B1 (en) | 2005-12-20 | 2006-12-20 | Methods for coupling honeycomb seals to gas turbine engine components |
JP2006342781A JP4902338B2 (en) | 2005-12-20 | 2006-12-20 | Method for joining a honeycomb seal to a gas turbine engine component |
DE602006005595T DE602006005595D1 (en) | 2005-12-20 | 2006-12-20 | Method for coupling honeycomb seals to gas turbine engine components |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/312,868 US20070137039A1 (en) | 2005-12-20 | 2005-12-20 | Methods and apparatus for coupling honeycomb seals to gas turbine engine components |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070137039A1 true US20070137039A1 (en) | 2007-06-21 |
Family
ID=37845258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/312,868 Abandoned US20070137039A1 (en) | 2005-12-20 | 2005-12-20 | Methods and apparatus for coupling honeycomb seals to gas turbine engine components |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070137039A1 (en) |
EP (1) | EP1801358B1 (en) |
JP (1) | JP4902338B2 (en) |
DE (1) | DE602006005595D1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080298919A1 (en) * | 2007-05-30 | 2008-12-04 | United Technologies Corporation | Milling bleed holes into honeycomb process |
US9429041B2 (en) | 2014-05-14 | 2016-08-30 | General Electric Company | Turbomachine component displacement apparatus and method of use |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3049648B1 (en) * | 2016-03-30 | 2018-04-13 | Safran Aircraft Engines | OPTIMIZED METHOD AND DEVICE FOR THE CRIMPING FIXATION OF A CARRIER SUPPORT ABRADABLE TO A RADIALLY INTERNAL WALL OF A TURBOMACHINE AIRBORNE SECTOR |
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US7523552B2 (en) * | 2007-05-30 | 2009-04-28 | United Technologies Corporation | Milling bleed holes into honeycomb process |
US9429041B2 (en) | 2014-05-14 | 2016-08-30 | General Electric Company | Turbomachine component displacement apparatus and method of use |
Also Published As
Publication number | Publication date |
---|---|
JP2007182876A (en) | 2007-07-19 |
JP4902338B2 (en) | 2012-03-21 |
EP1801358B1 (en) | 2009-03-11 |
EP1801358A1 (en) | 2007-06-27 |
DE602006005595D1 (en) | 2009-04-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GENERAL ELECTRIC COMPANY, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AHTI, ROBERT ALLAN;ALEXANDER, ALBERT ARTHUR;CAMPBELL, ALEXANDER KENNETH;REEL/FRAME:017402/0192 Effective date: 20051216 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |