EP3959422B1 - Outil pour deposer un disque de soufflante d'un module - Google Patents

Outil pour deposer un disque de soufflante d'un module Download PDF

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Publication number
EP3959422B1
EP3959422B1 EP20729814.2A EP20729814A EP3959422B1 EP 3959422 B1 EP3959422 B1 EP 3959422B1 EP 20729814 A EP20729814 A EP 20729814A EP 3959422 B1 EP3959422 B1 EP 3959422B1
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EP
European Patent Office
Prior art keywords
module
tool
fan disc
rotor
axis
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.)
Active
Application number
EP20729814.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3959422A1 (fr
Inventor
Sylvain Pierre Théodore HELLARD
Titu Kumar BARUA
Eric Serge GUERARD
Yannick Jean LE MANER
François PAGLIANO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
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Safran Aircraft Engines SAS
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Filing date
Publication date
Application filed by Safran Aircraft Engines SAS filed Critical Safran Aircraft Engines SAS
Publication of EP3959422A1 publication Critical patent/EP3959422A1/fr
Application granted granted Critical
Publication of EP3959422B1 publication Critical patent/EP3959422B1/fr
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Classifications

    • 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
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/70—Disassembly methods

Definitions

  • the present invention relates in particular to a tool for removing a single fan disc from a module and to a method for removing a single fan disc from a module by means of such a tool.
  • a turbomachine such as a turbofan engine, comprises, from upstream to downstream in the direction of gas flow, a fan, one or more compressor stages (low pressure then high pressure), a combustion chamber, a or several turbine stages (high pressure then low pressure) and an exhaust nozzle.
  • Such a turbomachine corresponds to the assembly of a plurality of modules mounted relative to each other. During a maintenance action, different modules are dismantled and transported to different stations in order to undergo various maintenance operations (replacement of wearing parts, replacement/repair of parts with defects, etc.) necessary for the delivery in service of the turbomachine.
  • module the “low pressure compressor module” hereinafter referred to as the “module”.
  • Such a module is defined along a longitudinal axis X and comprises a rotor and a stator independent of each other.
  • the rotor comprises in particular a fan disc, a drum and an annular sealing part centered on the X axis and fixed to each other via a circular row of bolts each comprising a screw and a nut.
  • Each screw also passes through a retaining member arranged at inside the rotor.
  • Each retaining member has at least two facing lugs disposed around a head of the screw and projecting relative thereto, this retaining member making it possible to hold the head of the corresponding screw in place when the screw is removed.
  • associated nut which is located outside the rotor.
  • the rotor also comprises several annular rows of vanes attached to the drum and arranged one behind the other, each row of vanes being more commonly referred to as a “moving wheel”.
  • the stator is centered on the X axis and surrounds the drum.
  • the stator comprises several annular rectifiers interposed between the moving wheels.
  • the first rectifier is associated with the fan so as to form stage no. 1, the following ones each being associated with a movable wheel so as to form the following stages.
  • Each rectifier comprises an inner shroud and an outer shroud connected to one another by an annular row of vanes. The outer shrouds of all the rectifiers are clamped to each other.
  • the existing tools make it possible to dismantle the module as a whole according to a determined process in which the fan disk is one of the elements of the module deposited last. In other words, the removal of the fan disc cannot be done without carrying out a complete dismantling of the module.
  • An example of an existing tool is disclosed in the document US2012151735 .
  • the objective of the present invention is thus to propose, on the one hand, a tool for removing a fan disk alone from a module and, on the other hand, a method of removing a single fan disk from a module by means of such a tool, thus allowing a gain in productivity.
  • Such a tool makes it possible to remove the fan disk alone while retaining the rest of the assembled module. Thus, during a maintenance operation relating solely to the fan disk, such a tool allows a significant gain in productivity.
  • Such a tool can also be used for refitting the repaired fan disc (or fitting a new fan disc) onto the rest of the assembled module.
  • Such a method makes it possible to remove the fan disk alone, by means of the tool, while retaining the rest of the assembled module.
  • the implementation of such a method allows a significant gain in productivity.
  • module 1 low pressure compressor module
  • a turbomachine defined along a longitudinal axis X and comprising a rotor 2 and a stator 3 independent of each other, and in other words the rotor 2 and the stator 3 are not guided relative to each other via, for example, a bearing.
  • the longitudinal axis X of module 1 is coinciding with the longitudinal axis of the turbomachine, when the module 1 is in place in the turbomachine.
  • the rotor 2 comprises a fan disc 4, a drum 5 and an annular sealing piece 6 centered on the X axis and fixed to each other via a circular row of bolts 7 each comprising a screw 8 and a nut 9.
  • Each screw 8 passes through a retaining member 10 disposed inside the rotor 2.
  • Each retaining member 10 has at least two facing lugs 11 disposed around a head 12 of the screw 8 and projecting relative at head 12.
  • the stator 3 is centered on the axis X and surrounds the drum 5.
  • the stator 3 is longitudinally delimited by a rectifier r4 arranged opposite the fan disc 4, the rectifier r4 comprising an outer shroud 14 having a flange 15.
  • the fan disc 4 is arranged upstream of the drum 5 and comprises a plurality of cells each intended to receive a fan blade (not included in the module 1).
  • the fan disc 4 has a plurality of lobes 16 distributed in a regular manner around the axis X at its downstream end, these lobes 16 forming a flange.
  • the fan disk 4 is partially shown in the picture 2 .
  • the head 12 of each screw 8 is placed inside the rotor 2.
  • the nut 9 of each bolt 7 is placed outside the rotor 2.
  • Each screw 8 crosses successively, from the head 12 to the corresponding nut 9, a through hole made in the corresponding retainer 10, a through hole made in the sealing part 6, a through hole made in a flange of the drum 5 and a through hole made in a lobe 16 of the disc fan 4.
  • the screws 8 here have a square head 12.
  • each retaining member 10 is arranged longitudinally between the head 12 of the corresponding screw 8 and the sealing part 6.
  • Each retaining member 10 comprises four lugs 11 facing two by two which surround the head 12 of the corresponding screw 8 , the lugs 11 projecting from the head 12.
  • the retaining members 10 and the heads 12 of the screws 8 are arranged in a common circular groove 17 of the sealing part 6.
  • a retaining member 10 makes it possible to maintain places the head 12 of the corresponding screw 8 (located inside the rotor 2) when removing the associated nut 9 (located outside the rotor 2).
  • the sealing part 6 is also fitted onto a projection 18 of the fan disk 4 at its internal end and hooked onto a projection 19 of the drum 5 at its external end.
  • the rotor 2 also comprises four annular rows of blades 20 attached to the drum 5 and arranged one behind the other, each row of blades 20 being more commonly referred to as a “moving wheel”.
  • the four mobile wheels are respectively numbered, from upstream to downstream, wheel R2 (for wheel n°2) to wheel R5 (for wheel n°5), wheel R1 (for wheel n°1) being considered to be the fan .
  • the stator 3 comprises five annular rectifiers interposed between the moving wheels.
  • the five rectifiers are numbered, from upstream to downstream, rectifier r1 (for rectifier n°1) to rectifier r5 (for rectifier n°5).
  • the first rectifier r1 is associated with the fan so as to form stage n°1, the following ones being each associated with a wheel (wheels R2 to R5) so as to form the following stages (stage n°2 to stage n° 5).
  • Each rectifier r1 to r5 comprises an inner shroud 13 and an outer shroud 14 connected to one another by an annular row of vanes 21.
  • the vanes 21 are for example welded to the inner and outer shrouds 13, 14 so as to form a machine-welded assembly.
  • the outer shrouds 14 of the set of rectifiers r1 to r5 are clamped to each other.
  • upstream and downstream are defined with respect to the direction of circulation of the gases in the module 1, the gases successively passing through the different stages.
  • FIG. 2 illustrates the module 1 in a first state E1 corresponding to the module 1 as it is when it is received to undergo a maintenance operation.
  • FIG. 1 illustrates the module 1 in a second state E2 in which the fifth rectifier r5 has been removed, the outer shroud 14 of the fourth rectifier r4 then having a free flange 15.
  • the second state E2 here corresponds to the state in which the module is located 1 to remove the fan disc 4 alone.
  • a module 1 found in a third state E3 corresponds to a module 1 found in a second state E2 from which the fan disk 4 has been removed.
  • the fan disc 4 alone is removed (or removed) from a module 1 which is in a second state E2 by means of a tool 22.
  • the terms “lower” and “upper” associated with the various components of the tool 22 are defined with respect to the vertical axis Z.
  • the terms “internal” and “external » Associated with the various components of the tool 22 are defined with respect to the vertical axis Z.
  • the frame 23 comprises a platform 33 on which the supports 30 rest and a shaft 34 on which the plate 25 rests.
  • the platform 33 is flat, perpendicular to the axis Z and substantially triangular, each support 30 being arranged at the level of a projecting angular portion of the platform 33.
  • the shaft 34 is centered on the Z axis and rises from the platform 33.
  • the ground support means 24 here comprise three feet distributed evenly around the Z axis .
  • the plate 25 comprises an upper annular surface 35 delimited by two flanges 36, these flanges 36 being configured to hold the ends of the sealing part 6 during fitting of the repaired fan disc (or of a new fan disc ) on a module 1 located in a third state E3.
  • the pins 27 of the first and second rows 26a, 26b are arranged on the upper surface 35.
  • the first and second rows 26a, 26b have the same number of pins 27 (here ten pins) and are symmetrical with respect to the Z axis.
  • the holes 28 are thus also symmetrical with respect to the Z axis.
  • the pins 27 as well as the two holes 28 are arranged equidistant from the Z axis.
  • the holes 28 are here blind holes lying at the level of the upper surface 35
  • the angular difference between the two holes 28 is equal to 180 degrees.
  • the indexing fingers 29 have been represented on the figure 5 to indicate the location of the holes 28.
  • the plate 25 comprises a thermal protection 37 at its internal surface, so as to protect plate 25 from heat when fitting the repaired fan disc (or a new fan disc). Indeed, to achieve the fitting, the sealing piece 6 is heated to a predetermined temperature.
  • the support surfaces 31 are located in the same plane perpendicular to the Z axis. Each support surface 31 is located at an upper end of the corresponding support 30. Each support surface 31 is in the form of a annular sector and is delimited on the outside by a border 38.
  • the three supports are arranged with respect to the pins 27 so that the heads 12 bear before the flange 15 when the module 1 is placed in position on the tool 22.
  • Each support 30 comprises a recess 39 oriented on the side of the vertical axis Z and configured to allow the passage of the fifth wheel R5, when positioning the module 1 on the tool 22.
  • the supports 30 can be adjustable with respect to to the platform 33 in a direction perpendicular to the Z axis.
  • the first visual cue 32 is in the form of a vertical line 32 arranged on the periphery of the shaft 34 and the periphery of the plate 25, this vertical line 32 being configured to orient the module 1 angularly with respect to the tool 22.
  • This first visual cue 32 can be obtained by applying one or more self-adhesive strips.
  • the tool 22 comprises a second visual cue 40 which is in the form of a horizontal line 40 arranged on the periphery of the shaft 34, this horizontal line 40 being configured to determine a vertical position of the module 1 from which the module 1 must be indexed with respect to tool 22.
  • the horizontal line here intersects the vertical line.
  • this second visual cue 40 can be obtained via the application of one or more self-adhesive strips.
  • the plate 25 and the supports 30 are made of a non-metallic material, so as not to damage the module 1.
  • the plate 25 and the supports 30 are for example made of Teflon® .
  • the method is implemented on a module 1 which is in a second state E2, and in other words a module 1 from which the fifth rectifier r5 has been removed.
  • the module 1 is held during steps a) to f) via a first manipulation tool 43 on which the module 1 is positioned and held, the first handling tool 43 comprising at least one pair of first opposed journals 44, 45, each of the first journals 44, 45 being linked to an attachment bracket 46 of a lifting system 47.
  • the first handling tool 43 comprises a first part 48 able to be fixed to the rotor 2 of the module 1 and a second part 49 able to be fixed to the stator 3 of the module 1.
  • the first handling tool 43 comprises adjustment means configured to adjust longitudinally over a predetermined range the positioning of the first part 48 (rotor 2) vis-à-vis the second part 49 (stator 3) or vice versa.
  • rotor 2 and stator 3 are independent of each other. This longitudinal adjustment is used in particular to guarantee that the heads 12 of the screws 8 bear before the flange 15 when the module 1 is placed in position on the tool 22.
  • the first manipulation tool 43 comprises a pair of central pins 44 and a pair of end journals 45. Each of the pairs of journals 44, 45 is adapted to be attached to an independent lifting system 47.
  • Each lifting system 47 comprises for example a lifting device (such as a winch) (not shown), a lifter 50 and two attachment lugs 46.
  • the module 1 is in a horizontal position so that the longitudinal axis X of the module 1 is substantially parallel to the ground on which the tool 22 rests.
  • the first manipulation tool 43 is linked to a first lifting system 47 via the middle trunnions 44 and to a second lifting system 47 via the end trunnions 45.
  • step a an operator removes the bolts 7 placed at 3 o'clock and 9 o'clock by analogy with the dial of a clock.
  • the bolts 7 placed at 3 o'clock and 9 o'clock are thus considered to be the reference bolts.
  • the angular difference between the two reference bolts is indeed equal to the angular difference between the two holes 28 of the plate 25, namely 180 degrees.
  • the free orifices 41 are then at 3 o'clock and 9 o'clock.
  • the module 1 is in the vertical position, the fan disk 4 then being vertically above the drum 5.
  • the first manipulation tool 43 is linked to a single lifting system 47 via the end trunnions 45.
  • step c an operator checks the first manipulation tool 43 so as to align one of the free orifices 41 (identifiable via the absence of the nut) with the vertical line (first visual cue 32). This step c) aligns the two free holes 41 with the two holes 28 of the plate 25.
  • step d) is performed when the free flange 15 of the rectifier r4 is located vertically at the level of the horizontal line (second visual cue 40).
  • An operator then successively introduces, from outside the module 1, the two indexing fingers 29. Each indexing finger 29 passes through a free orifice 41 of the rotor 2 and a hole 28 of the plate 25.
  • step e the module 1 is lowered so as to rest the heads 12 of the screws 8 on the pins 27 of the plate 25. It is essential to first rest the rotor 2 (the heads 12 of the screws 8) then in a second step the stator 3 (flange 15 of the rectifier r4) in order to avoid any unexpected movement of the rotor 2 during the removal of the first handling tool 43.
  • step e it is possible to use the adjustment means of the first manipulation tool 43 in order to move the rotor 2 longitudinally with respect to the stator 3 or vice versa.
  • step d the flange 15 of the rectifier r4 is brought to rest on the bearing surfaces 31 of the supports 30.
  • the recesses 39 allow the passage of the fifth wheel R5.
  • step d it is possible to adjust the supports 30 with respect to the platform 33.
  • the method comprises, between steps f) and g), a step f1) consisting in removing the first manipulation tool 43 from the module 1.
  • the fan disc 4 is held during steps g) to i) via a second handling tool 51 on which the fan disc 4 is positioned and held, the second handling tool 51 comprising at least a pair of second opposed journals 52 , each of the second trunnions 52 being linked to an attachment lug 46 of a lifting system 47.
  • the second handling tool 51 comprises a first lifting element 53 and a second lifting element 54 adapted to be fixed to the fan disc 4.
  • the first and second lifting elements 53, 54 are arranged symmetrically with respect to the X axis.
  • Each of the lifting elements 53, 54 comprises a trunnion 52, the trunnions 52 being adapted to be attached to a lifting system 47.
  • the lifting system 47 comprises for example a lifting device (such as a winch ) (not shown), a crossbar 50 and two attachment lugs 46.
  • the fan disc 4 is extracted during step h) via three extractors 42 evenly distributed around the axis Z. Extraction is controlled by progressively unscrewing three extraction nuts 55 previously screwed onto three screws 8 each located close to one of the three extractors 42, and by progressively inserting wedges 56 around the three screws 8 fitted with extraction nuts 55 between the fan disc 4 and the drum 5, the extraction nuts 55 and the shims 56 being of a non-metallic material.
  • each extractor 42 comprises a first arm 57 and a second arm 58 hinged relative to each other, the first arm 57 resting on the fan disc 4 and the second arm 58 resting on the part of annular seal 6.
  • Each extractor 42 comprises a hydraulic actuator 59 articulated with respect to the first and second arms 57, 58, this hydraulic actuator 59 being configured to separate the first and second arms 57, 58 from each other and the other, and thus vertically extract the fan disc 4 alone from the sealing piece 6 on which it is fitted.
  • the wedges 56 make it possible to avoid any inclination of the fan disk 4 during a drop in hydraulic pressure at the level of the extractors 42.
  • the extraction nuts 55 and the wedges 56 are made of a non-metallic material, so as not to damage the screws 8.
  • the extraction nuts 55 and the wedges 56 are for example made of Teflon® .
  • the sub-steps h1) to h3) are repeated so as to raise the fan disc 4 as much as possible relative to the drum 5.
  • module 1 is in its third state E3.
  • the refitting (or the positioning) of the repaired fan disc (or of a new fan disc) is carried out directly on the module 1 as it was following the aforementioned process, namely in its third state E3 and placed on the tool 22.
  • the same tool 22 thus makes it possible to remove the fan disc 4 but also to refit it.
  • care must be taken to orient the repaired fan disc correctly by aligning a mark associated with the repaired fan disc (for example a notch) with the marks on the other components of module 1.
  • sealing part 6 of module 1 is heated to allow fitting of the repaired fan disc into sealing part 6 of module 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP20729814.2A 2019-04-26 2020-04-21 Outil pour deposer un disque de soufflante d'un module Active EP3959422B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1904463A FR3095492B1 (fr) 2019-04-26 2019-04-26 Outil pour deposer un disque de soufflante d’un module
PCT/FR2020/000142 WO2020217003A1 (fr) 2019-04-26 2020-04-21 Outil pour deposer un disque de soufflante d'un module

Publications (2)

Publication Number Publication Date
EP3959422A1 EP3959422A1 (fr) 2022-03-02
EP3959422B1 true EP3959422B1 (fr) 2023-02-08

Family

ID=67660299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20729814.2A Active EP3959422B1 (fr) 2019-04-26 2020-04-21 Outil pour deposer un disque de soufflante d'un module

Country Status (10)

Country Link
US (1) US11879352B2 (pt)
EP (1) EP3959422B1 (pt)
JP (1) JP7427023B2 (pt)
KR (1) KR20220002349A (pt)
CN (1) CN113795651B (pt)
BR (1) BR112021021199A2 (pt)
CA (1) CA3134323A1 (pt)
FR (1) FR3095492B1 (pt)
SG (1) SG11202111777WA (pt)
WO (1) WO2020217003A1 (pt)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451979A (en) * 1980-10-27 1984-06-05 Elliott Turbomachinery Company, Inc. Assembly and disassembly apparatus for use with a rotary machine
GB0613929D0 (en) * 2006-07-13 2006-08-23 Rolls Royce Plc An engine core stand arrangement and method of removal and transportation of an engine core
US8683670B2 (en) * 2010-12-20 2014-04-01 Turbine Tooling Solutions Llc Method for partial disassembly of a bypass turbofan engine
FR2971004B1 (fr) * 2011-02-01 2013-02-15 Snecma Procede d'assemblage d'une turbine basse-pression de turboreacteur a double corps
US9228451B2 (en) * 2011-05-03 2016-01-05 Pratt & Whitney Canada Corp. Gas turbine engine module adapter to a carrier
US8814512B2 (en) * 2011-07-05 2014-08-26 United Technologies Corporation Fan disk apparatus and method
FR2990239B1 (fr) * 2012-05-02 2015-10-30 Snecma Procede de devissage avant d'un ecrou de liaison dans un turboreacteur a double corps, outillage de devissage
US8776347B2 (en) * 2012-06-29 2014-07-15 United Technologies Corporation Tool for rotor assembly and disassembly
FR3016936B1 (fr) * 2014-01-24 2019-05-17 Safran Aircraft Engines Disque de rotor a dispositif de prelevement d'air centripete, compresseur comportant ledit disque et turbomachine avec un tel compresseur
EP3051077A1 (de) * 2015-02-02 2016-08-03 Siemens Aktiengesellschaft Montagevorrichtung zur montage oder demontage einer gasturbinenkomponente bei einer gasturbine, insbesondere von einer brennerkomponente bei einem brennersystem einer gasturbine
US10132198B2 (en) * 2016-01-06 2018-11-20 Honda Motor Co., Ltd. Support apparatus for disassembling and assembling gas turbine engine
KR101914870B1 (ko) * 2017-06-28 2018-12-28 두산중공업 주식회사 가스터빈의 분해 및 조립방법과 이에 의해 조립된 가스터빈
FR3069229B1 (fr) * 2017-07-20 2019-07-26 Safran Aircraft Engines Outil pour fixer une virole externe d’un carter intermediaire d’une turbomachine
FR3072137B1 (fr) * 2017-10-06 2020-07-24 Safran Aircraft Engines Dispositif pour l'assemblage d'une turbomachine, et procede utilisant le dispositif

Also Published As

Publication number Publication date
WO2020217003A1 (fr) 2020-10-29
CN113795651A (zh) 2021-12-14
US11879352B2 (en) 2024-01-23
JP2022530394A (ja) 2022-06-29
BR112021021199A2 (pt) 2021-12-21
EP3959422A1 (fr) 2022-03-02
CA3134323A1 (en) 2021-10-29
FR3095492B1 (fr) 2021-05-07
US20220220866A1 (en) 2022-07-14
CN113795651B (zh) 2024-02-23
FR3095492A1 (fr) 2020-10-30
SG11202111777WA (en) 2021-11-29
KR20220002349A (ko) 2022-01-06
JP7427023B2 (ja) 2024-02-02

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