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EP3731998B1 - Tool for removing an annular part of a turbomachine - Google Patents

Tool for removing an annular part of a turbomachine Download PDF

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Publication number
EP3731998B1
EP3731998B1 EP18839813.5A EP18839813A EP3731998B1 EP 3731998 B1 EP3731998 B1 EP 3731998B1 EP 18839813 A EP18839813 A EP 18839813A EP 3731998 B1 EP3731998 B1 EP 3731998B1
Authority
EP
European Patent Office
Prior art keywords
annular part
tool
fastening
turbomachine
maintaining means
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
EP18839813.5A
Other languages
German (de)
French (fr)
Other versions
EP3731998A1 (en
Inventor
Rémy LE GALL
Grégory HEBERT
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
Original Assignee
Safran Aircraft Engines SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Safran Aircraft Engines SAS filed Critical Safran Aircraft Engines SAS
Publication of EP3731998A1 publication Critical patent/EP3731998A1/en
Application granted granted Critical
Publication of EP3731998B1 publication Critical patent/EP3731998B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • 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
    • B25B27/16—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 abutted flanges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/107—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means for lifting engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof

Definitions

  • the invention relates to the general field of turbomachines. More particularly, the invention relates to a tool suitable for dismantling an annular part of a turbomachine, in particular a low-pressure turbine disk.
  • turbomachine 1 The general structure of a turbomachine 1 is schematized on the figure 1 .
  • the turbomachine 1 with longitudinal axis X comprises, from upstream to downstream, a fan 2, a low-pressure compressor 3, a high-pressure compressor 4, a combustion chamber 5, a high-pressure turbine 6 and a low-pressure turbine pressure 7.
  • the low pressure turbine 7 is mechanically linked to an axial shaft 8 driving the fan 2 and the low pressure compressor 3. It is noted that the upstream and the downstream are defined with respect to the direction of normal flow of the gas ( symbolized by an arrow) through the turbomachine 1.
  • the low pressure turbine 7 comprises one or more turbine stages, each turbine stage being composed of a stator and a rotor.
  • the rotor comprises a disc 10 carrying at its outer periphery blades 11, visible at the figure 8 , whose feet are engaged in grooves of the outer periphery of the disc 10.
  • each blade 11 comprises a platform 12, visible on the figure 2 , carried by the root of said blade 11.
  • the platforms 12 of the blades 11 wear out quickly which can, in certain cases, lead to the overlapping of the platforms 12 as can be seen in the figure 2 .
  • the manual repositioning of the blades 11 is not possible on the assembled turbine engine 1, it is necessary to dismantle the disk 10 of the low pressure turbine 7 in order to be able to replace I( es) blade(s) 11 damaged.
  • the turbomachine 1 is divided into so-called major modules, themselves comprising so-called minor modules. Such a distribution facilitates the assembly and disassembly of the turbomachine 1.
  • the turbomachine 1 comprises, from upstream to downstream, a first major module A (or fan section), a second major module B (or high-pressure body) and a third major module C (or low-pressure turbine section ).
  • the major module C comprises three sub-modules, a first sub-module comprising the rotor and the stator of the turbine 7, a second sub-module comprising the axial shaft 8, and a third sub-module comprising an exhaust casing 14.
  • the invention makes it possible to solve the aforementioned drawbacks by proposing a solution making it possible to easily, quickly and inexpensively dismantle an annular part of a turbomachine, in particular a low-pressure turbine disk.
  • the invention according to a first aspect relates to a dismantling tool according to claim 1.
  • annular part is meant a part having a circular through-cavity.
  • the tool according to the invention When dismantling the annular part, the tool according to the invention is positioned opposite the annular part to be extracted so that the opening made in the hooking and holding means is crossed by the shaft of the turbomachine . It is noted that the opening is traversed by the shaft only when the latter protrudes relative to the annular part during dismantling.
  • the hooking and holding means are fixed to the annular part which is then extracted from the rest of the turbomachine by moving the tool axially outwards.
  • Removing the disk only requires extracting, beforehand, the exhaust casing of the turbomachine positioned downstream of the disk so as to gain access to the disk.
  • the tool is then positioned facing the disk in order to fix the hooking and holding means on the disk. Once the hooking and holding means are fixed on the disc, a simple axial movement of the tool outwards makes it possible to separate the disc from the rest of the turbomachine.
  • the shaft of the turbomachine projects with respect to the disc. Thus, when positioning the tool, the shaft passes through the opening made in the hooking and holding means until the latter are sufficiently close to the disc to allow the tool to be fixed on the disc. .
  • the presence of the opening made in the hooking and holding means thus makes it possible to extract the annular part without having to first extract the shaft on which the annular part is mounted. It is also noted that the dismantling of the exhaust casing can be carried out using the same tool, which makes it possible to reduce costs.
  • the dismantling tool according to the invention facilitates the reassembly of the disk and of the exhaust casing since there are fewer parts to be assembled on the turbomachine.
  • the procedure for reassembling the disc and the exhaust casing is therefore also less time-consuming and less expensive.
  • the dismantling tool according to the invention may have one or more additional characteristics among the following, considered individually or in all technically possible combinations.
  • the tool comprises means for rotating the hooking and holding means with respect to the support, said rotating means being positioned between the support and the hooking and maintenance.
  • the hooking and holding means are arranged on a peripheral portion of the support to allow the rotation of the hooking and holding means relative to the support when the annular part is fixed to the means of grip and hold.
  • the rotation means comprise locking means adapted to hold the hooking and holding means in the first position and in the second position.
  • the hooking and holding means are formed by a ring comprising through holes adapted to receive first fixing means.
  • the tool comprises second fixing means suitable for coupling the hooking and holding means and the annular part and for cooperating with the hooking and holding means so as to fix the means hooking and holding on the annular piece.
  • the tool comprises means for adjusting the center of gravity of the tool.
  • the figures 5 to 9 represent the dismantling tool 100 according to a non-limiting embodiment of the invention.
  • the support 101 is adapted to support an annular part 10, 14 of the turbomachine 1 when said annular part 10, 14 is fixed to the attachment and holding means 102.
  • the annular part 10, 14 is for example a disc 10 of the turbine low pressure 7 as shown on the figures 6 to 9 or even an exhaust casing 14 etc.
  • disk is meant a disk without blades or a disk on which blades are mounted.
  • the shape, dimensions and material of the support 101 are chosen so that the support 101 has sufficient mechanical strength not to break during disassembly, reassembly or even during maintenance of the annular part 10, 14.
  • maintenance means in particular the replacement of a blade.
  • the support 101 is made of steel.
  • the support 101 is perforated which makes it possible to limit the manufacturing costs of the tool 100.
  • the support 101 has a semicircular shape composed of a base 1012 and a semicircular portion 1013.
  • the base 1012 extends over a length comprised in the interval [662 mm ; 1862 mm], preferably 1312 mm.
  • the support 101 can have other shapes such as circular, rectangular, square, triangular etc.
  • the support 101 whatever its shape, mainly extends along a plane, which will be called the first plane P11. In other words, when the support 101 has a semicircular shape, the base 1012 and the semicircular portion 1013 both extend along the first plane P11.
  • the first plane P11 is vertical when the tool 100 is used for disassembly, maintenance or reassembly of the annular part 10, 14.
  • the terms “vertical plane” and “horizontal plane” are defined with reference, respectively, to the XY plane and the XZ plane of the XYZ reference frame shown in figure 5 .
  • the support 101 includes means 107 for retaining the annular part 10, 14 visible on the figure 5 .
  • the retention means 107 make it possible to prevent the annular part 10, 14 from tilting during disassembly or reassembly of said annular part 10, 14.
  • the retention means 107 serve also as a reinforcement to the tool 100.
  • the retention means 107 are arranged so as to form a support surface for the annular part 10, 14 when it is fixed on the tool 100.
  • the retention means 107 are formed by two vertical bars arranged on either side of the hooking and holding means 102 and extend perpendicularly with respect to the base 1012.
  • each bar is connected, by a first end, at the base 1012 and, via a second end, at the semi-circular portion 1013 of the support 101.
  • the retention means 107 can have other shapes not shown in the figures.
  • the tool 100 also comprises gripping means 1011 making it possible to grasp, hold and move the tool 100 during disassembly, reassembly or even maintenance of the annular part 10, 14, for example by means of a lifting system.
  • the gripping means 1011 are formed by a loop, arranged at the top of the semi-circular portion 1013, in which is inserted a hook 1012 of the lifting system as illustrated in figure 8 .
  • the hooking and holding means 102 ensure the fixing of the tool 100 on the annular part 10, 14 during disassembly, maintenance or even during the reassembly of the annular part 10, 14.
  • through holes 105 are made in the hooking and holding means 102 and are adapted to receive first fixing means 106.
  • the first fixing means 106 cooperate with second fixing means fixing (not shown) of the tool 100 to ensure the fixing of the hooking and holding means 102 on the annular part 10, 14.
  • the second fixing means are formed by removable hooks which allow the coupling of the annular piece 10, 14 with hooking and holding means 102.
  • the first fixing means 106 are formed by fixing screws which are inserted into the through holes 105 made in the hooking and holding means 102 until they come into contact with the removable hooks.
  • the tightening of the fixing screws on the removable hooks makes it possible to press the hooking and holding means 102 against the annular part 10, 14 to connect them properly to each other.
  • the use of removable hooks makes it possible to ensure the integrity of the annular part 10, 14 insofar as it is not necessary to drill holes in the annular part 10, 14 to attach it to the tool 100.
  • the hooking and holding means 102 comprise an emerging opening 1021 whose shape and dimensions are adapted to receive an axial shaft 8 of the turbomachine 1, visible on the figure 7 , during disassembly and reassembly of the annular part 10, 14.
  • the opening 1021 allows the centering of the hooking and holding means 102 on the internal diameter of the annular part 10, 14.
  • the opening 1021 is circular and has a diameter included in the range [400mm, 600mm], preferably 450mm.
  • the hooking and holding means 102 are interchangeable so that it is possible to replace them with hooking and holding means of different diameters.
  • the attachment and holding means 102 are in the form of a ring.
  • the hooking and holding means 102 can have another shape, for example square, rectangular.
  • the hooking and holding means 102 whatever their shape, mainly extend along a plane, which will be called second plane P12.
  • the characteristics of the hooking and holding means 102 are chosen so as to avoid any damage to the annular part 10, 14.
  • the hooking and holding means 102 are made of a material having sufficient strength to support the annular part 10, 14 when it is fixed on the hooking and holding means 102.
  • the means of hook and hold 102 are made of steel.
  • attachment and holding means 102 are rotatable relative to the support 101 between a first position P1 and a second position P2.
  • the attachment and holding means 102 are substantially parallel to the support 101, ie the first plane P11 is substantially parallel to the second plane P12. Furthermore, in this position P1, the first plane P11 and the second plane P12 are substantially vertical.
  • the hooking and holding means 102 are in the first position P1 during disassembly and reassembly and in the second position P2 during maintenance of the annular part 10, 14.
  • the attachment and holding means 102 are substantially perpendicular to the support 101, ie the first plane P11 is substantially perpendicular to the second plane P12. Furthermore, in this position P2, the first plane P11 is vertical while the second plane P12 is horizontal.
  • the hooking and holding means 102 are arranged on a peripheral portion of the support 101 so as to allow the rotation of the hooking and holding means 102 with respect to the support 101 when the annular part 10, 14 is fixed to the attachment and holding means 102.
  • the hooking and holding means 102 are positioned at the base 1012 of the support 101.
  • the base 1012 has a discontinuity at which the hooking and holding means 102 are positioned.
  • the rotation means 103 ensure the rotation of the attachment and holding means 102 with respect to the support 101 so as to allow passage from the first position P1 to the second position P2, and vice versa.
  • the passage from the first position P1 to the second position P2 is achieved by tilting the hooking and holding means 102 or the annular part 10, 14 (when it is fixed to the hooking and holding means 102 ) at an angle of 90° with respect to the support 101.
  • the rotation means 103 are positioned between the support 101 and the attachment and holding means 102. According to a non-limiting embodiment, the rotation means 103 are composed of an axis and a ring forming a pivot link. Naturally, the rotation means 103 can be formed by any system making it possible to form a pivot connection, for example a bearing.
  • the rotation means 103 comprise locking means adapted to hold the hooking and holding means 102 in the first position P1 or in the second position P2.
  • the locking means are for example formed by a pinning at 0° and 90°.
  • the adjustment means 104 are formed by an electric, hydraulic or any other axial displacement means.
  • the figure 10 represents the steps of the method 200 for removing an annular part 10, 14 mounted around a shaft 8 of the turbomachine 1 by means of the tool 100 according to the invention.
  • the turbomachine or a portion of the turbomachine is positioned horizontally, ie the longitudinal axis X, visible at figure 4a , of the turbine engine or of the portion of the turbine engine is parallel to the XZ plane of the XYZ reference frame illustrated in figure 5 .
  • a positioning step 201 the tool 100 is positioned opposite the annular part 10, 14 so that the opening 1021 of the attachment and holding means 102 is opposite a central cavity 20 of the part ring 10, 14.
  • the hooking and holding means 102 are held in the first position P1 during the positioning step 201.
  • the hooking and holding means 102 are locked in the first position P1 by the locking means.
  • the step 201 of positioning the tool 100 comprises the positioning of the opening 1021 of the hooking and holding means 102 around the shaft 8 then the axial displacement of the tool 100 inwards, i.e. in the direction of the annular part 10, 14.
  • a fixing step 202 the hooking and holding means 102 are fixed on the annular part 10, 14.
  • the fixing step 202 is carried out by positioning the second fixing means beforehand against the grip and hold 12 and the annular piece 10, 14 so as to ensure their coupling.
  • the first fixing means 106 formed here by fixing screws, are then inserted through the through holes 105 made in the hooking and holding means 102 then tightened against the removable hooks to correctly fix the hooking means and retainer 102 and the annular piece 10, 14.
  • a displacement step 203 the tool 100 fixed to the annular part 10, 14 is moved axially outwards so as to separate the annular part 10, 14 from the rest of the turbomachine 1.
  • "axial" displacement a displacement in a direction parallel to the axis X of the turbomachine 1.
  • a maintenance step 204 the annular part 10, 14, fixed to the tool 100, is placed on a frame 13 in order to carry out the maintenance of the annular part 10, 14 as can be seen in the figure 9 .
  • the attachment and holding means 102 are maintained in the second position P2.
  • the hooking and holding means 102 are tilted into the second position P2 by the rotation means 103.
  • the maintenance step 204 comprises the locking of the hooking and holding means 102 in the second position P2 by the locking means. Note that if the hooking and holding means 102 have been locked in the first position P1 during the positioning step 101, it is necessary to unlock the position of the hooking and holding means 102 in order to be able to switch to the second position P2. Furthermore, in order to facilitate the maintenance step 204 of the annular part 10, 14, the hooking and holding means 102 can be detached from the annular part 10, 14.
  • the aforementioned dismantling method 200 is carried out a first time to extract the exhaust casing 14 visible on the figure 4b then a second time to extract the disk 10 as represented on the figure 4c .
  • the figure 11 represents the steps of a method 300 for reassembling the annular part 10 after dismantling by the method 200.
  • a tilting step 301 the attachment and holding means 102 are tilted from the second position P2 to the first position P1 by the rotation means 103.
  • the attachment and holding means 102 are locked in the first position P1 by the locking means. It is noted that if the hooking and holding means 102 have been locked in the second position P2 before the tilting step 301, it is necessary to unlock the position of the hooking and holding means 102 before being able to do them. switch to the first position P1.
  • the tool 100 on which the annular part 10, 14 is fixed is positioned facing the turbine engine 1 so that the shaft 8 of the turbine engine can pass through the opening 1021 provided in the means of hooking and holding 102.
  • the opening 1021 of the hooking and holding means 102 is positioned facing the turbine engine 1 so as to surround the shaft 8 of the turbine engine 1.
  • a displacement step 303 the tool 100 is moved axially inwards, i.e. towards the turbomachine, until the annular part 10, 14 returns to its initial position in the turbomachine.
  • initial position is meant the position of the annular part 10, 14 before the removal of said annular part 10, 14 from the turbine engine 1.
  • a disengagement step 304 the attachment and holding means 102 are disengaged from the annular part 10, 14.
  • an extraction step 305 the tool 100 is extracted by moving it axially outward from the turbomachine 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention se rapporte au domaine général des turbomachines. Plus particulièrement, l'invention concerne un outil adapté pour le démontage d'une pièce annulaire de turbomachine, notamment un disque de turbine basse pression.The invention relates to the general field of turbomachines. More particularly, the invention relates to a tool suitable for dismantling an annular part of a turbomachine, in particular a low-pressure turbine disk.

ARRIÈRE PLAN TECHNOLOGIQUE DE L'INVENTIONTECHNOLOGICAL BACKGROUND OF THE INVENTION

La structure générale d'une turbomachine 1 est schématisée sur la figure 1.The general structure of a turbomachine 1 is schematized on the figure 1 .

En référence à la figure 1, la turbomachine 1 d'axe longitudinal X comporte, d'amont en aval, une soufflante 2, un compresseur basse-pression 3, un compresseur haute-pression 4, une chambre de combustion 5, une turbine haute pression 6 et une turbine basse pression 7. La turbine basse pression 7 est mécaniquement liée à un arbre axial 8 entraînant la soufflante 2 et le compresseur basse pression 3. On note que l'amont et l'aval sont définis par rapport au sens d'écoulement normal du gaz (symbolisé par une flèche) à travers la turbomachine 1.With reference to the figure 1 , the turbomachine 1 with longitudinal axis X comprises, from upstream to downstream, a fan 2, a low-pressure compressor 3, a high-pressure compressor 4, a combustion chamber 5, a high-pressure turbine 6 and a low-pressure turbine pressure 7. The low pressure turbine 7 is mechanically linked to an axial shaft 8 driving the fan 2 and the low pressure compressor 3. It is noted that the upstream and the downstream are defined with respect to the direction of normal flow of the gas ( symbolized by an arrow) through the turbomachine 1.

La turbine basse pression 7 comporte un ou plusieurs étages de turbine, chaque étage de turbine étant composé d'un stator et d'un rotor. Le rotor comporte un disque 10 portant à sa périphérie extérieure des aubes 11, visibles à la figure 8, dont les pieds sont engagés dans des rainures de la périphérie extérieure du disque 10. Par ailleurs, chaque aube 11 comporte une plateforme 12, visible sur la figure 2, portée par le pied de ladite aube 11.The low pressure turbine 7 comprises one or more turbine stages, each turbine stage being composed of a stator and a rotor. The rotor comprises a disc 10 carrying at its outer periphery blades 11, visible at the figure 8 , whose feet are engaged in grooves of the outer periphery of the disc 10. Furthermore, each blade 11 comprises a platform 12, visible on the figure 2 , carried by the root of said blade 11.

Cependant, les plateformes 12 des aubes 11 s'usent rapidement ce qui peut, dans certains cas, conduire au chevauchement des plateformes 12 comme on peut le voir sur la figure 2. Lorsqu'un tel chevauchement est constaté, et si la remise en place manuelle des aubes 11 n'est pas possible sur la turbomachine 1 assemblée, il est nécessaire de procéder au démontage du disque 10 de la turbine basse pression 7 pour pouvoir remplacer I(es) aube(s) 11 endommagée(s).However, the platforms 12 of the blades 11 wear out quickly which can, in certain cases, lead to the overlapping of the platforms 12 as can be seen in the figure 2 . When such an overlap is observed, and if the manual repositioning of the blades 11 is not possible on the assembled turbine engine 1, it is necessary to dismantle the disk 10 of the low pressure turbine 7 in order to be able to replace I( es) blade(s) 11 damaged.

La turbomachine 1 est répartie en modules dits majeurs, comportant eux-mêmes des modules dits mineurs. Une telle répartition facilite le montage et le démontage de la turbomachine 1. En référence à la figure 1, la turbomachine 1 comporte, d'amont en aval, un premier module majeur A (ou section de soufflante), un deuxième module majeur B (ou corps haute-pression) et un troisième module majeur C (ou section de turbine basse-pression). Le module majeur C comprend trois sous-modules, un premier sous-module comportant le rotor et le stator de la turbine 7, un second sous-module comportant l'arbre axial 8, et un troisième sous-module comportant un carter d'échappement 14.The turbomachine 1 is divided into so-called major modules, themselves comprising so-called minor modules. Such a distribution facilitates the assembly and disassembly of the turbomachine 1. With reference to figure 1 , the turbomachine 1 comprises, from upstream to downstream, a first major module A (or fan section), a second major module B (or high-pressure body) and a third major module C (or low-pressure turbine section ). The major module C comprises three sub-modules, a first sub-module comprising the rotor and the stator of the turbine 7, a second sub-module comprising the axial shaft 8, and a third sub-module comprising an exhaust casing 14.

Afin de procéder au remplacement d'une aube 11 de la turbine basse pression 7, le troisième module majeur C est entièrement démonté. La procédure utilisée pour le démontage du disque 10 de la turbine basse pression 7 est schématisée sur les figures 3a à 3g et comporte :

  • une première étape, visible à la figure 3b, dans laquelle le module majeur C est séparé du reste de la turbomachine positionnée à l'horizontal,
  • une deuxième étape, visible à la figure 3c, dans laquelle le module majeur C est positionné à la verticale sur un premier bâti 13,
  • une troisième étape, visible à la figure 3d, dans laquelle le carter d'échappement 14 est extrait du module majeur C,
  • une quatrième étape, visible à la figure 3e, dans laquelle l'arbre axial 8 est retiré,
  • une cinquième étape, visible à la figure 3f, dans laquelle le premier sous-module est positionné sur un second bâti 15,
  • une sixième étape, visible à la figure 3g, dans laquelle le disque 10 est extrait du premier sous-module.
In order to replace a blade 11 of the low pressure turbine 7, the third major module C is completely dismantled. The procedure used for the dismantling of the disk 10 of the low pressure turbine 7 is shown schematically on the figures 3a to 3g and includes:
  • a first step, visible at the figure 3b , in which the major module C is separated from the rest of the turbomachine positioned horizontally,
  • a second stage, visible at the figure 3c , in which the major module C is positioned vertically on a first frame 13,
  • a third stage, visible at 3d figure , in which the exhaust casing 14 is extracted from the major module C,
  • a fourth stage, visible at the figure 3e , in which the axial shaft 8 is removed,
  • a fifth stage, visible at the figure 3f , in which the first sub-module is positioned on a second frame 15,
  • a sixth stage, visible at the figure 3g , in which disc 10 is extracted from the first sub-module.

On note que lorsqu'on parle de positionnement « horizontal » et « vertical » de la turbomachine, on entend la position de la turbomachine ou d'une portion de la turbomachine dans laquelle son axe longitudinal X est, respectivement, parallèle et perpendiculaire au support sur lequel ladite turbomachine est en appui.It should be noted that when we speak of "horizontal" and "vertical" positioning of the turbomachine, we mean the position of the turbomachine or of a portion of the turbomachine in which its longitudinal axis X is, respectively, parallel and perpendicular to the support on which said turbomachine bears.

Les procédures de démontage puis de réassemblage du disque 10 de la turbine basse pression 7 sont donc complexes, longues et .couteuses. De plus, le démontage du troisième module majeur C peut exposer certaines pièces sensibles telles que les paliers à roulements (non représentés) qui risquent d'être endommagés.The procedures for dismantling then reassembling the disk 10 of the low pressure turbine 7 are therefore complex, long and costly. In addition, the dismantling of the third major module C can expose certain sensitive parts such as the rolling bearings (not shown) which risk being damaged.

Par ailleurs, comme on peut le voir sur les figures 3a à 3g, la procédure de démontage du disque 10 nécessite l'utilisation de différents outils ce qui engendre des coûts supplémentaires.Moreover, as can be seen in the figures 3a to 3g , the procedure for disassembling the disc 10 requires the use of various tools, which generates additional costs.

Le document WO 2017/116244 A1 divulgue un outil selon le préambule de la revendication 1.The document WO 2017/116244 A1 discloses a tool according to the preamble of claim 1.

Ainsi, il n'existe pas, à ce jour, de procédures et/ou d'outillage permettant d'assurer un démontage et un réassemblage d'un disque de turbine basse pression qui soit simple, rapide et peu couteux.Thus, to date, there are no procedures and/or tools making it possible to ensure disassembly and reassembly of a low-pressure turbine disc which is simple, rapid and inexpensive.

DESCRIPTION GENERALE DE L'INVENTIONGENERAL DESCRIPTION OF THE INVENTION

L'invention permet de résoudre les inconvénients précités en proposant une solution permettant de démonter facilement, rapidement et à moindre coût une pièce annulaire de turbomachine, notamment un disque de turbine basse pression.The invention makes it possible to solve the aforementioned drawbacks by proposing a solution making it possible to easily, quickly and inexpensively dismantle an annular part of a turbomachine, in particular a low-pressure turbine disk.

Ainsi, l'invention selon un premier aspect se rapporte à un outil de démontage selon la revendication 1.Thus, the invention according to a first aspect relates to a dismantling tool according to claim 1.

Par « pièce annulaire », on entend une pièce présentant une cavité débouchante circulaire.By "annular part" is meant a part having a circular through-cavity.

Lors du démontage de la pièce annulaire, l'outil selon l'invention est positionné en regard de la pièce annulaire à extraire de sorte que l'ouverture ménagée dans les moyens d'accroche et de maintien soit traversée par l'arbre de la turbomachine. On note que l'ouverture est traversée par l'arbre uniquement lorsque celui-ci fait saillie par rapport à la pièce annulaire lors du démontage. Les moyens d'accroche et de maintien sont fixés sur la pièce annulaire qui est ensuite extraite du reste de la turbomachine en déplaçant axialement l'outil vers l'extérieur.When dismantling the annular part, the tool according to the invention is positioned opposite the annular part to be extracted so that the opening made in the hooking and holding means is crossed by the shaft of the turbomachine . It is noted that the opening is traversed by the shaft only when the latter protrudes relative to the annular part during dismantling. The hooking and holding means are fixed to the annular part which is then extracted from the rest of the turbomachine by moving the tool axially outwards.

L'utilisation de l'outil selon l'invention permet de simplifier la procédure de démontage de la pièce annulaire tout en réduisant le temps et les coûts nécessaires au démontage. En effet, lorsque l'outil est utilisé pour démonter un disque de la turbine basse pression, celui-ci permet de s'affranchir des étapes :

  • d'extraction du troisième module majeur C,
  • de positionnement à la verticale du troisième module majeur C sur un premier bâti,
  • d'extraction de l'arbre axial,
  • de positionnement à la verticale du premier sous-module sur un second bâti.
The use of the tool according to the invention makes it possible to simplify the procedure for dismantling the annular part while reducing the time and the costs necessary for dismantling. In fact, when the tool is used to dismantle a disc of the low pressure turbine, it makes it possible to dispense with the steps:
  • extraction of the third major module C,
  • vertical positioning of the third major module C on a first frame,
  • extraction of the axial shaft,
  • vertical positioning of the first sub-module on a second frame.

Le démontage du disque nécessite uniquement d'extraire, au préalable, le carter d'échappement de la turbomachine positionné à l'aval du disque de manière à accéder au disque. L'outil est ensuite positionné en regard du disque afin de fixer les moyens d'accroche et de maintien sur le disque. Une fois les moyens d'accroche et de maintien fixés sur le disque, un simple déplacement axial de l'outil vers l'extérieur permet de séparer le disque du reste de la turbomachine. On note qu'après le retrait du carter d'échappement, l'arbre de la turbomachine est en saillie par rapport au disque. Ainsi, lors du positionnement de l'outil, l'arbre traverse l'ouverture ménagée dans les moyens d'accroche et de maintien jusqu'à ce que ces derniers soient suffisamment proches du disque pour permettre la fixation de l'outil sur le disque. La présence de l'ouverture ménagée dans les moyens d'accroche et de maintien permet ainsi d'extraire la pièce annulaire sans avoir à extraire au préalable l'arbre sur lequel la pièce annulaire est montée. On note également que le démontage du carter d'échappement peut être réalisé en utilisant le même outil ce qui permet de réduire les coûts.Removing the disk only requires extracting, beforehand, the exhaust casing of the turbomachine positioned downstream of the disk so as to gain access to the disk. The tool is then positioned facing the disk in order to fix the hooking and holding means on the disk. Once the hooking and holding means are fixed on the disc, a simple axial movement of the tool outwards makes it possible to separate the disc from the rest of the turbomachine. It is noted that after removal of the exhaust casing, the shaft of the turbomachine projects with respect to the disc. Thus, when positioning the tool, the shaft passes through the opening made in the hooking and holding means until the latter are sufficiently close to the disc to allow the tool to be fixed on the disc. . The presence of the opening made in the hooking and holding means thus makes it possible to extract the annular part without having to first extract the shaft on which the annular part is mounted. It is also noted that the dismantling of the exhaust casing can be carried out using the same tool, which makes it possible to reduce costs.

Par ailleurs, l'outil de démontage selon l'invention permet de faciliter le réassemblage du disque et du carter d'échappement puisqu'il y a moins de pièces à assembler sur la turbomachine. La procédure de réassemblage du disque et du carter d'échappement est donc également moins longue et moins couteuse.Furthermore, the dismantling tool according to the invention facilitates the reassembly of the disk and of the exhaust casing since there are fewer parts to be assembled on the turbomachine. The procedure for reassembling the disc and the exhaust casing is therefore also less time-consuming and less expensive.

En outre, certaines pièces sensibles, telles que les paliers, ne risquent plus d'être exposées lors du démontage car il n'est plus nécessaire de démonter entièrement le troisième module majeur C.In addition, certain sensitive parts, such as the bearings, are no longer at risk of being exposed during disassembly because it is no longer necessary to completely disassemble the third major module C.

Outre les caractéristiques qui viennent d'être évoquées dans le paragraphe précédent, l'outil de démontage selon l'invention peut présenter une ou plusieurs caractéristiques complémentaires parmi les suivantes, considérées individuellement ou selon toutes les combinaisons techniquement possibles.In addition to the characteristics which have just been mentioned in the preceding paragraph, the dismantling tool according to the invention may have one or more additional characteristics among the following, considered individually or in all technically possible combinations.

Dans un mode de réalisation non limitatif, les moyens d'accroche et de maintien sont mobiles en rotation par rapport au support entre :

  • une première position dans laquelle les moyens d'accroche et de maintien sont sensiblement parallèles au support,
  • une seconde position dans laquelle les moyens d'accroche et de maintien sont sensiblement perpendiculaires au support.
In a non-limiting embodiment, the hooking and holding means are rotatable relative to the support between:
  • a first position in which the hooking and holding means are substantially parallel to the support,
  • a second position in which the hooking and holding means are substantially perpendicular to the support.

Dans un mode de réalisation non limitatif, l'outil comporte des moyens de mise en rotation des moyens d'accroche et de maintien par rapport au support, lesdits moyens de mise en rotation étant positionnés entre le support et les moyens d'accroche et de maintien.In one non-limiting embodiment, the tool comprises means for rotating the hooking and holding means with respect to the support, said rotating means being positioned between the support and the hooking and maintenance.

Dans un mode de réalisation non limitatif, les moyens d'accroche et de maintien sont agencés sur une portion périphérique du support pour autoriser la rotation des moyens d'accroche et de maintien par rapport au support lorsque la pièce annulaire est fixée aux moyens d'accroche et de maintien.In a non-limiting embodiment, the hooking and holding means are arranged on a peripheral portion of the support to allow the rotation of the hooking and holding means relative to the support when the annular part is fixed to the means of grip and hold.

Dans un mode de réalisation non limitatif, les moyens de mise en rotation comportent des moyens de verrouillage adaptés pour maintenir les moyens d'accroche et de maintien dans la première position et dans la seconde position.In a non-limiting embodiment, the rotation means comprise locking means adapted to hold the hooking and holding means in the first position and in the second position.

Dans un mode de réalisation non limitatif, les moyens d'accroche et de maintien sont formés par une bague comportant des orifices traversants adaptés pour recevoir des premiers moyens de fixation.In a non-limiting embodiment, the hooking and holding means are formed by a ring comprising through holes adapted to receive first fixing means.

Dans un mode de réalisation non limitatif, l'outil comporte des seconds moyens de fixation adaptés pour coupler les moyens d'accroche et de maintien et la pièce annulaire et pour coopérer avec les moyens d'accroche et de maintien de manière à fixer les moyens d'accroche et de maintien sur la pièce annulaire.In a non-limiting embodiment, the tool comprises second fixing means suitable for coupling the hooking and holding means and the annular part and for cooperating with the hooking and holding means so as to fix the means hooking and holding on the annular piece.

Dans un mode de réalisation non limitatif, l'outil comporte des moyens de réglage du centre gravité de l'outil.In a non-limiting embodiment, the tool comprises means for adjusting the center of gravity of the tool.

Dans un mode de réalisation non limitatif, les moyens de réglages sont formés par :

  • un anneau,
  • une vis sans fin,
  • un volant permettant, en actionnant la vis sans fin, la translation axiale de l'anneau.
In a non-limiting embodiment, the adjustment means are formed by:
  • a ring,
  • an endless screw,
  • a flywheel allowing, by actuating the endless screw, the axial translation of the ring.

Par ailleurs, l'invention selon un deuxième aspect concerne un procédé de démontage et d'entretien d'une pièce annulaire montée autour d'un arbre de turbomachine présentant un axe longitudinal, au moyen de l'outil selon le premier aspect de l'invention. Le procédé de démontage comportant les étapes suivantes :

  • positionner l'outil en face de la pièce annulaire de sorte que l'ouverture des moyens d'accroche et de maintien soit en regard d'une cavité centrale de la pièce annulaire, les moyens d'accroche et de maintien étant maintenus dans la première position,
  • fixer les moyens d'accroche et de maintien sur la pièce annulaire,
  • déplacer l'outil axialement vers l'extérieur de manière à séparer la pièce annulaire du reste de la turbomachine,
  • placer la pièce annulaire, fixée à l'outil, sur un bâti pour réaliser l'entretien de la pièce annulaire, les moyens d'accroche et de maintien étant maintenus dans la seconde position.
Furthermore, the invention according to a second aspect relates to a method for dismantling and maintaining an annular part mounted around a turbomachine shaft having a longitudinal axis, by means of the tool according to the first aspect of the invention. The dismantling process comprising the following steps:
  • position the tool in front of the annular part so that the opening of the hooking and holding means faces a central cavity of the annular part, the hooking and holding means being held in the first position,
  • fix the hooking and holding means on the annular part,
  • move the tool axially outwards so as to separate the annular part from the rest of the turbomachine,
  • placing the annular part, fixed to the tool, on a frame to carry out the maintenance of the annular part, the hooking and holding means being maintained in the second position.

Enfin, l'invention selon un troisième aspect se rapporte à un procédé de réassemblage d'une pièce annulaire autour d'un arbre de turbomachine présentant un axe longitudinal au moyen de l'outil selon le premier aspect de l'invention. Le procédé selon le troisième aspect comportant les étapes suivantes :

  • basculer les moyens d'accroche et de maintien vers la première position par les moyens de mise en rotation,
  • positionner l'outil fixé à la pièce annulaire en regard de l'arbre de la turbomachine de sorte que ledit arbre puisse traverser l'ouverture ménagée dans les moyens d'accroche et de maintien,
  • déplacer l'outil axialement jusqu'à ce que la pièce annulaire regagne une position initiale autour de l'arbre,
  • désengager les moyens d'accroche et de maintien de la pièce annulaire,
  • extraire l'outil de la turbomachine en déplaçant axialement l'outil vers l'extérieur de la turbomachine.
Finally, the invention according to a third aspect relates to a method for reassembling an annular part around a turbomachine shaft having a longitudinal axis by means of the tool according to the first aspect of the invention. The method according to the third aspect comprising the following steps:
  • tilt the hooking and holding means towards the first position by the rotation means,
  • positioning the tool fixed to the annular part opposite the shaft of the turbomachine so that said shaft can pass through the opening made in the hooking and holding means,
  • move the tool axially until the annular part regains an initial position around the shaft,
  • disengage the means for hooking and holding the annular part,
  • extract the tool from the turbomachine by moving the tool axially towards the outside of the turbomachine.

BREVES DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF FIGURES

Les figures ne sont présentées qu'à titre indicatif et nullement limitatif. Les figures montrent :

  • à la figure 1, une vue schématique en coupe longitudinale d'une turbomachine,
  • à la figure 2, deux aubes adjacentes dont les plateformes se chevauchent,
  • aux figures 3a à 3g, les étapes du procédé de démontage d'un disque de turbomachine selon l'art antérieur,
  • à la figure 4a à 4c, les étapes du procédé de démontage d'un disque de turbomachine au moyen de l'outil selon l'invention,
  • à la figure 5, l'outil de démontage selon un mode de réalisation de l'invention,
  • à la figure 6, une vue en coupe longitudinale de l'outil illustré à la figure 5 lorsqu'il est fixé sur un disque de turbomachine, les moyens d'accroche et de maintien étant dans la première position,
  • à la figure 7, une vue depuis l'amont de l'outil de la figure 6 lorsqu'il est positionné sur la turbomachine,
  • à la figure 8, une vue en perspective de l'outil de la figure 7, après le démontage du disque,
  • à la figure 9, l'outil selon l'invention lors de l'entretien du disque, les moyens d'accroche et de maintien étant dans la seconde position,
  • à la figure 10, une représentation en blocs des étapes du procédé de démontage d'une pièce annulaire selon un mode de réalisation de l'invention,
  • à la figure 11, une représentation en blocs des étapes d'un procédé de réassemblage de la pièce annulaire selon un mode de réalisation de l'invention.
The figures are presented for information only and are in no way limiting. The figures show:
  • to the figure 1 , a schematic view in longitudinal section of a turbomachine,
  • to the picture 2 , two adjacent blades whose platforms overlap,
  • to figures 3a to 3g , the steps of the method for removing a turbomachine disk according to the prior art,
  • to the figure 4a to 4c , the steps of the method for removing a turbomachine disk by means of the tool according to the invention,
  • to the figure 5 , the dismantling tool according to one embodiment of the invention,
  • to the figure 6 , a longitudinal sectional view of the tool illustrated in figure 5 when it is attached to a turbine engine disc, the hooking and holding means being in the first position,
  • to the figure 7 , a view from upstream of the tool of the figure 6 when it is positioned on the turbomachine,
  • to the figure 8 , a perspective view of the tool of the figure 7 , after removing the disc,
  • to the figure 9 , the tool according to the invention during maintenance of the disc, the hooking and holding means being in the second position,
  • to the figure 10 , a representation in blocks of the steps of the method for dismantling an annular part according to one embodiment of the invention,
  • to the figure 11 , a representation in blocks of the steps of a method for reassembling the annular part according to one embodiment of the invention.

D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description détaillée qui suit, en référence aux figures annexées.Other characteristics and advantages of the invention will become apparent on reading the detailed description which follows, with reference to the appended figures.

DESCRIPTION D'AU MOINS UN MODE DE REALISATION DE L'INVENTIONDESCRIPTION OF AT LEAST ONE EMBODIMENT OF THE INVENTION

Les figures 5 à 9 représentent l'outil 100 de démontage selon un mode de réalisation de l'invention non limitatif.The figures 5 to 9 represent the dismantling tool 100 according to a non-limiting embodiment of the invention.

En référence à la figure 5, l'outil 100 de démontage comporte :

  • un support 101,
  • des moyens d'accroche et de maintien 102,
  • des moyens de mise en rotation 103,
  • des moyens de réglages 104.
With reference to the figure 5 , the dismantling tool 100 comprises:
  • a support 101,
  • hooking and holding means 102,
  • rotation means 103,
  • adjustment means 104.

Le support 101 est adapté pour supporter une pièce annulaire 10, 14 de turbomachine 1 lorsque ladite pièce annulaire 10, 14 est fixée aux moyens d'accroche et de maintien 102. La pièce annulaire 10, 14 est par exemple un disque 10 de la turbine basse pression 7 tel que représenté sur les figures 6 à 9 ou encore un carter d'échappement 14 etc. Par « disque », on entend un disque sans aubes ou un disque sur lequel sont montées des aubes.The support 101 is adapted to support an annular part 10, 14 of the turbomachine 1 when said annular part 10, 14 is fixed to the attachment and holding means 102. The annular part 10, 14 is for example a disc 10 of the turbine low pressure 7 as shown on the figures 6 to 9 or even an exhaust casing 14 etc. By "disk" is meant a disk without blades or a disk on which blades are mounted.

La forme, les dimensions et le matériau du support 101 sont choisis de sorte que le support 101 présente une résistance mécanique suffisante pour ne pas rompre lors du démontage, du réassemblage ou encore lors de l'entretien de la pièce annulaire 10, 14. Par « entretien », on entend notamment le remplacement d'une aube. Avantageusement, le support 101 est réalisé en acier. Par ailleurs, comme on peut le voir sur la figure 5, le support 101 est ajouré ce qui permet de limiter les coûts de fabrication de l'outil 100.The shape, dimensions and material of the support 101 are chosen so that the support 101 has sufficient mechanical strength not to break during disassembly, reassembly or even during maintenance of the annular part 10, 14. By "maintenance" means in particular the replacement of a blade. Advantageously, the support 101 is made of steel. Moreover, as can be seen in the figure 5 , the support 101 is perforated which makes it possible to limit the manufacturing costs of the tool 100.

En outre, selon le mode de réalisation présenté à la figure 5, le support 101 présente une forme semi-circulaire composée d'une base 1012 et d'une portion en demi-cercle 1013. Selon un mode de réalisation, la base 1012 s'étend sur une longueur comprise dans l'intervalle [662 mm ; 1862 mm], préférentiellement 1312 mm. Bien entendu, le support 101 peut présenter d'autres formes telles qu'une forme circulaire, rectangulaire, carrée, triangulaire etc. En outre, le support 101, quel que soit sa forme, s'étend principalement suivant un plan, que l'on appellera premier plan P11. En d'autres termes, lorsque le support 101 présente une forme semi-circulaire, la base 1012 et la portion en demi-cercle 1013 s'étendent toutes les deux suivant le premier plan P11. Le premier plan P11 est vertical lorsque l'outil 100 est utilisé pour le démontage, l'entretien ou le réassemblage de la pièce annulaire 10, 14. Les termes « plan vertical » et « plan horizontal » sont définis en référence, respectivement, au plan XY et au plan XZ du référentiel XYZ illustré à la figure 5.Furthermore, according to the embodiment presented in figure 5 , the support 101 has a semicircular shape composed of a base 1012 and a semicircular portion 1013. According to one embodiment, the base 1012 extends over a length comprised in the interval [662 mm ; 1862 mm], preferably 1312 mm. Of course, the support 101 can have other shapes such as circular, rectangular, square, triangular etc. Furthermore, the support 101, whatever its shape, mainly extends along a plane, which will be called the first plane P11. In other words, when the support 101 has a semicircular shape, the base 1012 and the semicircular portion 1013 both extend along the first plane P11. The first plane P11 is vertical when the tool 100 is used for disassembly, maintenance or reassembly of the annular part 10, 14. The terms "vertical plane" and "horizontal plane" are defined with reference, respectively, to the XY plane and the XZ plane of the XYZ reference frame shown in figure 5 .

De plus, le support 101 comporte des moyens de rétention 107 de la pièce annulaire 10, 14 visibles sur la figure 5. Les moyens de rétention 107 permettent d'éviter à la pièce annulaire 10, 14 de basculer lors du démontage ou du réassemblage de ladite pièce annulaire 10, 14. De plus, les moyens de rétention 107 servent également de renfort à l'outil 100. Pour ce faire, les moyens de rétention 107 sont agencés de manière à former une surface d'appui pour la pièce annulaire 10, 14 lorsqu'elle est fixée sur l'outil 100. Selon le mode de réalisation de la figure 5, les moyens de rétention 107 sont formés par deux barres verticales agencées de part et d'autre des moyens d'accroche et de maintien 102 et s'étendent perpendiculairement par rapport à la base 1012. En outre, chaque barre est reliée, par une première extrémité, à la base 1012 et, par une seconde extrémité, à la portion en demi-cercle 1013 du support 101. Bien entendu, les moyens de rétention 107 peuvent présenter d'autres formes non représentées sur les figures.In addition, the support 101 includes means 107 for retaining the annular part 10, 14 visible on the figure 5 . The retention means 107 make it possible to prevent the annular part 10, 14 from tilting during disassembly or reassembly of said annular part 10, 14. In addition, the retention means 107 serve also as a reinforcement to the tool 100. To do this, the retention means 107 are arranged so as to form a support surface for the annular part 10, 14 when it is fixed on the tool 100. According to the mode of realization of the figure 5 , the retention means 107 are formed by two vertical bars arranged on either side of the hooking and holding means 102 and extend perpendicularly with respect to the base 1012. In addition, each bar is connected, by a first end, at the base 1012 and, via a second end, at the semi-circular portion 1013 of the support 101. Of course, the retention means 107 can have other shapes not shown in the figures.

Avantageusement, l'outil 100 comporte également des moyens de préhension 1011 permettant de saisir, maintenir et déplacer l'outil 100 lors du démontage, du réassemblage ou encore de l'entretien de la pièce annulaire 10, 14, par exemple au moyen d'un système de levage. Dans le mode de réalisation illustré à la figure 5, les moyens de préhension 1011 sont formés par une boucle, agencée au sommet de la portion en demi-cercle 1013, dans laquelle est inséré un crochet 1012 du système de levage tels qu'illustrés à la figure 8.Advantageously, the tool 100 also comprises gripping means 1011 making it possible to grasp, hold and move the tool 100 during disassembly, reassembly or even maintenance of the annular part 10, 14, for example by means of a lifting system. In the embodiment illustrated in figure 5 , the gripping means 1011 are formed by a loop, arranged at the top of the semi-circular portion 1013, in which is inserted a hook 1012 of the lifting system as illustrated in figure 8 .

Par ailleurs, les moyens d'accroche et de maintien 102 assurent la fixation de l'outil 100 sur la pièce annulaire 10, 14 lors du démontage, de l'entretien ou encore lors du réassemblage de la pièce annulaire 10, 14. Pour ce faire, des orifices traversants 105 sont ménagés dans les moyens d'accroche et de maintien 102 et sont adaptés pour recevoir des premiers moyens de fixation 106. Selon un mode de réalisation non limitatif, les premiers moyens de fixation 106 coopèrent avec des seconds moyens de fixation (non représentés) de l'outil 100 pour assurer la fixation des moyens d'accroche et de maintien 102 sur la pièce annulaire 10, 14. Avantageusement, les seconds moyens de fixation sont formés par des crochets amovibles qui permettent le couplage de la pièce annulaire 10, 14 avec les moyens d'accroche et de maintien 102.Furthermore, the hooking and holding means 102 ensure the fixing of the tool 100 on the annular part 10, 14 during disassembly, maintenance or even during the reassembly of the annular part 10, 14. For this do, through holes 105 are made in the hooking and holding means 102 and are adapted to receive first fixing means 106. According to a non-limiting embodiment, the first fixing means 106 cooperate with second fixing means fixing (not shown) of the tool 100 to ensure the fixing of the hooking and holding means 102 on the annular part 10, 14. Advantageously, the second fixing means are formed by removable hooks which allow the coupling of the annular piece 10, 14 with hooking and holding means 102.

Selon le mode de réalisation de la figure 5, les premiers moyens de fixation 106 sont formés par des vis de fixation qui sont introduites dans les orifices traversants 105 ménagés dans les moyens d'accroche et de maintien 102 jusqu'à venir au contact des crochets amovibles. Le serrage des vis de fixation sur les crochets amovibles permet de presser les moyens d'accroche et de maintien 102 contre la pièce annulaire 10, 14 pour les solidariser correctement les uns aux autres. L'utilisation de crochets amovibles permet d'assurer l'intégrité de la pièce annulaire 10, 14 dans la mesure où il n'est pas nécessaire de percer des trous dans la pièce annulaire 10, 14 pour la fixer à l'outil 100.According to the embodiment of the figure 5 , the first fixing means 106 are formed by fixing screws which are inserted into the through holes 105 made in the hooking and holding means 102 until they come into contact with the removable hooks. The tightening of the fixing screws on the removable hooks makes it possible to press the hooking and holding means 102 against the annular part 10, 14 to connect them properly to each other. The use of removable hooks makes it possible to ensure the integrity of the annular part 10, 14 insofar as it is not necessary to drill holes in the annular part 10, 14 to attach it to the tool 100.

Par ailleurs, les moyens d'accroche et de maintien 102 comportent une ouverture 1021 débouchante dont la forme et les dimensions sont adaptées pour recevoir un arbre axial 8 de la turbomachine 1, visible sur la figure 7, lors du démontage et du réassemblage de la pièce annulaire 10, 14. En outre, l'ouverture 1021 permet le centrage des moyens d'accroche et de maintien 102 sur le diamètre interne de la pièce annulaire 10, 14. Selon un mode de réalisation non limitatif, l'ouverture 1021 est circulaire et présente un diamètre compris dans l'intervalle [400mm, 600mm], préférentiellement 450mm. Avantageusement, les moyens d'accroche et de maintien 102 sont interchangeables de sorte qu'il est possible de les substituer par des moyens d'accroche et de maintien de diamètres différents.Furthermore, the hooking and holding means 102 comprise an emerging opening 1021 whose shape and dimensions are adapted to receive an axial shaft 8 of the turbomachine 1, visible on the figure 7 , during disassembly and reassembly of the annular part 10, 14. In addition, the opening 1021 allows the centering of the hooking and holding means 102 on the internal diameter of the annular part 10, 14. According to a mode of Non-limiting embodiment, the opening 1021 is circular and has a diameter included in the range [400mm, 600mm], preferably 450mm. Advantageously, the hooking and holding means 102 are interchangeable so that it is possible to replace them with hooking and holding means of different diameters.

Selon le mode de réalisation des figures 5 à 9, les moyens d'accroche et de maintien 102 se présentent sous la forme d'une bague. Bien entendu les moyens d'accroche et de maintien 102 peuvent présenter une autre forme, par exemple carrée, rectangulaire. En outre, les moyens d'accroche et de maintien 102, quel que soit leur forme, s'étendent principalement suivant un plan, que l'on appellera deuxième plan P12.According to the embodiment of figures 5 to 9 , the attachment and holding means 102 are in the form of a ring. Of course the hooking and holding means 102 can have another shape, for example square, rectangular. In addition, the hooking and holding means 102, whatever their shape, mainly extend along a plane, which will be called second plane P12.

De manière avantageuse, les caractéristiques des moyens d'accroche et de maintien 102, notamment le(s) matériau(x) et/ou les éléments de protection utilisés, sont choisies de manière à éviter tout endommagement de la pièce annulaire 10, 14. Ainsi, les moyens d'accroche et de maintien 102 sont réalisés dans un matériau présentant une résistance suffisante pour supporter la pièce annulaire 10, 14 lorsqu'elle est fixée sur les moyens d'accroche et de maintien 102. Avantageusement, les moyens d'accroche et de maintien 102 sont réalisés en acier.Advantageously, the characteristics of the hooking and holding means 102, in particular the material(s) and/or the protective elements used, are chosen so as to avoid any damage to the annular part 10, 14. Thus, the hooking and holding means 102 are made of a material having sufficient strength to support the annular part 10, 14 when it is fixed on the hooking and holding means 102. Advantageously, the means of hook and hold 102 are made of steel.

Par ailleurs, les moyens d'accroche et de maintien 102 sont mobiles en rotation par rapport au support 101 entre une première position P1 et une seconde position P2.Furthermore, the attachment and holding means 102 are rotatable relative to the support 101 between a first position P1 and a second position P2.

Dans la première position P1, illustrée aux figures 6 à 8, les moyens d'accroche et de maintien 102 sont sensiblement parallèles au support 101, i.e. le premier plan P11 est sensiblement parallèle au deuxième plan P12. En outre, dans cette position P1, le premier plan P11 et le deuxième plan P12 sont sensiblement verticaux. Avantageusement, les moyens d'accroche et de maintien 102 sont dans la première position P1 lors du démontage et du réassemblage et dans la seconde position P2 lors de l'entretien de la pièce annulaire 10, 14.In the first position P1, illustrated in figures 6 to 8 , the attachment and holding means 102 are substantially parallel to the support 101, ie the first plane P11 is substantially parallel to the second plane P12. Furthermore, in this position P1, the first plane P11 and the second plane P12 are substantially vertical. Advantageously, the hooking and holding means 102 are in the first position P1 during disassembly and reassembly and in the second position P2 during maintenance of the annular part 10, 14.

Dans la seconde position P2, illustrée à la figure 9, les moyens d'accroche et de maintien 102 sont sensiblement perpendiculaires au support 101, i.e. le premier plan P11 est sensiblement perpendiculaire au deuxième plan P12. En outre, dans cette position P2, le premier plan P11 est vertical tandis que le deuxième plan P12 est horizontal.In the second position P2, illustrated in figure 9 , the attachment and holding means 102 are substantially perpendicular to the support 101, ie the first plane P11 is substantially perpendicular to the second plane P12. Furthermore, in this position P2, the first plane P11 is vertical while the second plane P12 is horizontal.

Par ailleurs, selon un mode de réalisation non limitatif, les moyens d'accroche et de maintien 102 sont agencés sur une portion périphérique du support 101 de manière à autoriser la rotation des moyens d'accroche et de maintien 102 par rapport au support 101 lorsque la pièce annulaire 10, 14 est fixée aux moyens d'accroche et de maintien 102. Selon le mode de réalisation présenté à la figure 5, les moyens d'accroche et de maintien 102 sont positionnés au niveau de la base 1012 du support 101. En d'autres termes, la base 1012 présente une discontinuité au niveau de laquelle les moyens d'accroche et de maintien 102 sont positionnés.Furthermore, according to a non-limiting embodiment, the hooking and holding means 102 are arranged on a peripheral portion of the support 101 so as to allow the rotation of the hooking and holding means 102 with respect to the support 101 when the annular part 10, 14 is fixed to the attachment and holding means 102. According to the embodiment presented in figure 5 , the hooking and holding means 102 are positioned at the base 1012 of the support 101. In other words, the base 1012 has a discontinuity at which the hooking and holding means 102 are positioned.

Les moyens de mise en rotation 103 assurent la rotation des moyens d'accroche et de maintien 102 par rapport au support 101 de manière à permettre le passage de la première position P1 à la seconde position P2, et inversement. En particulier, le passage de la première position P1 à la seconde position P2 est réalisé en basculant les moyens d'accroche et de maintien 102 ou la pièce annulaire 10, 14 (lorsqu'elle est fixée aux moyens d'accroche et de maintien 102) d'un angle de 90° par rapport au support 101.The rotation means 103 ensure the rotation of the attachment and holding means 102 with respect to the support 101 so as to allow passage from the first position P1 to the second position P2, and vice versa. In particular, the passage from the first position P1 to the second position P2 is achieved by tilting the hooking and holding means 102 or the annular part 10, 14 (when it is fixed to the hooking and holding means 102 ) at an angle of 90° with respect to the support 101.

Les moyens de mise en rotation 103 sont positionnés entre le support 101 et les moyens d'accroche et de maintien 102. Selon un mode de réalisation non limitatif, les moyens de mise en rotation 103 sont composés d'un axe et d'une bague formant une liaison pivot. Naturellement, les moyens de mise en rotation 103 peuvent être formés par tout système permettant de former une liaison pivot, par exemple un roulement.The rotation means 103 are positioned between the support 101 and the attachment and holding means 102. According to a non-limiting embodiment, the rotation means 103 are composed of an axis and a ring forming a pivot link. Naturally, the rotation means 103 can be formed by any system making it possible to form a pivot connection, for example a bearing.

Par ailleurs, les moyens de mise en rotation 103 comportent des moyens de verrouillage adaptés pour maintenir les moyens d'accroche et de maintien 102 dans la première position P1 ou dans la seconde position P2. Les moyens de verrouillage sont par exemple formés par un goupillage à 0° et 90°.Furthermore, the rotation means 103 comprise locking means adapted to hold the hooking and holding means 102 in the first position P1 or in the second position P2. The locking means are for example formed by a pinning at 0° and 90°.

Les moyens de réglage 104 sont adaptés pour modifier le centre gravité de l'outil 100, en particulier lorsque la pièce annulaire 10, 14 est fixée à l'outil 100 afin d'assurer la stabilité de la pièce annulaire 10, 14 lors du démontage et du réassemblage de la pièce annulaire 10, 14. Selon un mode de réalisation non limitatif, les moyens de réglages 104 sont formés par un moyen de déplacement mécanique axial comportant :

  • un anneau 1041,
  • une vis sans fin 1042,
  • un volant 1043 permettant, en actionnant la vis sans fin 1042, la translation axiale de l'anneau 1041.
The adjustment means 104 are adapted to modify the center of gravity of the tool 100, in particular when the annular part 10, 14 is fixed to the tool 100 in order to ensure the stability of the annular part 10, 14 during disassembly. and the reassembly of the annular part 10, 14. According to a non-limiting embodiment, the adjustment means 104 are formed by an axial mechanical displacement means comprising:
  • a ring 1041,
  • a 1042 endless screw,
  • a flywheel 1043 allowing, by actuating the endless screw 1042, the axial translation of the ring 1041.

Dans une variante de réalisation de l'invention, les moyens de réglages 104 sont formés par un moyen de déplacement électrique, hydraulique ou tout autre moyen de déplacement axial.In a variant embodiment of the invention, the adjustment means 104 are formed by an electric, hydraulic or any other axial displacement means.

La figure 10 représente les étapes du procédé 200 de démontage d'une pièce annulaire 10, 14 montée autour d'un arbre 8 de turbomachine 1 au moyen de l'outil 100 selon l'invention. Lors du démontage de la pièce annulaire 10, 14, la turbomachine ou une portion de la turbomachine est positionnée horizontalement, i.e. l'axe longitudinal X, visible à la figure 4a, de la turbomachine ou de la portion de la turbomachine est parallèle au plan XZ du référentiel XYZ illustré à la figure 5.The figure 10 represents the steps of the method 200 for removing an annular part 10, 14 mounted around a shaft 8 of the turbomachine 1 by means of the tool 100 according to the invention. When dismantling the annular part 10, 14, the turbomachine or a portion of the turbomachine is positioned horizontally, ie the longitudinal axis X, visible at figure 4a , of the turbine engine or of the portion of the turbine engine is parallel to the XZ plane of the XYZ reference frame illustrated in figure 5 .

Dans une étape de positionnement 201, l'outil 100 est positionné en regard de la pièce annulaire 10, 14 de sorte que l'ouverture 1021 des moyens d'accroche et de maintien 102 soit en regard d'une cavité centrale 20 de la pièce annulaire 10, 14. Les moyens d'accroche et de maintien 102 sont maintenus dans la première position P1 lors de l'étape de positionnement 201. Avantageusement, les moyens d'accroche et de maintien 102 sont verrouillés dans la première position P1 par les moyens de verrouillage. Par ailleurs, lorsque l'arbre 8 de la turbomachine 1 est en saillie par rapport à la pièce annulaire 10, 14, l'étape de positionnement 201 de l'outil 100 comprend le positionnement de l'ouverture 1021 des moyens d'accroche et de maintien 102 autour de l'arbre 8 puis le déplacement axial de l'outil 100 vers l'intérieur, i.e. en direction de la pièce annulaire 10, 14.In a positioning step 201, the tool 100 is positioned opposite the annular part 10, 14 so that the opening 1021 of the attachment and holding means 102 is opposite a central cavity 20 of the part ring 10, 14. The hooking and holding means 102 are held in the first position P1 during the positioning step 201. Advantageously, the hooking and holding means 102 are locked in the first position P1 by the locking means. Furthermore, when the shaft 8 of the turbomachine 1 projects relative to the annular part 10, 14, the step 201 of positioning the tool 100 comprises the positioning of the opening 1021 of the hooking and holding means 102 around the shaft 8 then the axial displacement of the tool 100 inwards, i.e. in the direction of the annular part 10, 14.

Dans une étape de fixation 202, les moyens d'accroche et de maintien 102 sont fixés sur la pièce annulaire 10, 14. Avantageusement, l'étape de fixation 202 est réalisée en positionnant au préalable les seconds moyens de fixation contre les moyens d'accroche et de maintien 12 et la pièce annulaire 10, 14 de manière à assurer leur couplage. Les premiers moyens de fixation 106, formés ici par des vis de fixation, sont ensuite insérées à travers les orifices traversants 105 ménagés dans les moyens d'accroche et de maintien 102 puis serrées contre les crochets amovibles pour fixer correctement les moyens d'accroche et de maintien 102 et la pièce annulaire 10, 14.In a fixing step 202, the hooking and holding means 102 are fixed on the annular part 10, 14. Advantageously, the fixing step 202 is carried out by positioning the second fixing means beforehand against the grip and hold 12 and the annular piece 10, 14 so as to ensure their coupling. The first fixing means 106, formed here by fixing screws, are then inserted through the through holes 105 made in the hooking and holding means 102 then tightened against the removable hooks to correctly fix the hooking means and retainer 102 and the annular piece 10, 14.

Dans une étape de déplacement 203, l'outil 100 fixé à la pièce annulaire 10, 14 est déplacé axialement vers l'extérieur de manière à séparer la pièce annulaire 10, 14 du reste de la turbomachine 1. On note qu'on entend par déplacement « axial », un déplacement selon une direction parallèle à l'axe X de la turbomachine 1.In a displacement step 203, the tool 100 fixed to the annular part 10, 14 is moved axially outwards so as to separate the annular part 10, 14 from the rest of the turbomachine 1. "axial" displacement, a displacement in a direction parallel to the axis X of the turbomachine 1.

Dans une étape d'entretien 204, la pièce annulaire 10, 14, fixée à l'outil 100, est placée sur un bâti 13 afin de réaliser la maintenance de la pièce annulaire 10, 14 comme on peut le voir sur la figure 9. Lors de l'étape d'entretien 201, les moyens d'accroche et de maintien 102 sont maintenus dans la seconde position P2. Pour ce faire, les moyens d'accroche et de maintien 102 sont basculés dans la seconde position P2 par les moyens de mise en rotation 103. Avantageusement, l'étape d'entretien 204 comprend le verrouillage des moyens d'accroche et de maintien 102 dans la seconde position P2 par les moyens de verrouillage. On note que si les moyens d'accroche et de maintien 102 ont été verrouillés dans la première position P1 lors de l'étape de positionnement 101, il est nécessaire de déverrouiller la position des moyens d'accroche et de maintien 102 afin de pouvoir les faire basculer dans la seconde position P2. Par ailleurs, afin de faciliter l'étape d'entretien 204 de la pièce annulaire 10, 14, les moyens d'accroche et de maintien 102 peuvent être désolidarisés de la pièce annulaire 10, 14.In a maintenance step 204, the annular part 10, 14, fixed to the tool 100, is placed on a frame 13 in order to carry out the maintenance of the annular part 10, 14 as can be seen in the figure 9 . During the maintenance step 201, the attachment and holding means 102 are maintained in the second position P2. To do this, the hooking and holding means 102 are tilted into the second position P2 by the rotation means 103. Advantageously, the maintenance step 204 comprises the locking of the hooking and holding means 102 in the second position P2 by the locking means. Note that if the hooking and holding means 102 have been locked in the first position P1 during the positioning step 101, it is necessary to unlock the position of the hooking and holding means 102 in order to be able to switch to the second position P2. Furthermore, in order to facilitate the maintenance step 204 of the annular part 10, 14, the hooking and holding means 102 can be detached from the annular part 10, 14.

Lors du démontage d'un disque 10 de turbine basse 7 pression tel que représenté sur les figures 4a à 4c, le procédé 200 de démontage précité est réalisé une première fois pour extraire le carter d'échappement 14 visible sur la figure 4b puis une deuxième fois pour extraire le disque 10 tel que représenté sur la figure 4c.When dismantling a low pressure turbine disc 10 7 as shown in the figures 4a to 4c , the aforementioned dismantling method 200 is carried out a first time to extract the exhaust casing 14 visible on the figure 4b then a second time to extract the disk 10 as represented on the figure 4c .

La figure 11 représente les étapes d'un procédé 300 de réassemblage de la pièce annulaire 10 après le démontage par le procédé 200.The figure 11 represents the steps of a method 300 for reassembling the annular part 10 after dismantling by the method 200.

Dans une étape de basculement 301, les moyens d'accroche et de maintien 102 sont basculés de la seconde position P2 vers la première position P1 par les moyens de mise en rotation 103. Avantageusement, les moyens d'accroche et de maintien 102 sont verrouillés dans la première position P1 par les moyens de verrouillage. On note que si les moyens d'accroche et de maintien 102 ont été verrouillés dans la seconde position P2 avant l'étape de basculement 301, il est nécessaire de déverrouiller la position des moyens d'accroche et de maintien 102 avant de pouvoir les faire basculer dans la première position P1.In a tilting step 301, the attachment and holding means 102 are tilted from the second position P2 to the first position P1 by the rotation means 103. Advantageously, the attachment and holding means 102 are locked in the first position P1 by the locking means. It is noted that if the hooking and holding means 102 have been locked in the second position P2 before the tilting step 301, it is necessary to unlock the position of the hooking and holding means 102 before being able to do them. switch to the first position P1.

Dans une étape de positionnement 302, l'outil 100 sur lequel est fixée la pièce annulaire 10, 14 est positionné en regard de la turbomachine 1 de sorte que l'arbre 8 de la turbomachine puisse traverser l'ouverture 1021 ménagée dans les moyens d'accroche et de maintien 102. En d'autres termes, l'ouverture 1021 des moyens d'accroche et de maintien 102 est positionnée en regard de la turbomachine 1 de manière à entourer l'arbre 8 de la turbomachine 1.In a positioning step 302, the tool 100 on which the annular part 10, 14 is fixed is positioned facing the turbine engine 1 so that the shaft 8 of the turbine engine can pass through the opening 1021 provided in the means of hooking and holding 102. In other words, the opening 1021 of the hooking and holding means 102 is positioned facing the turbine engine 1 so as to surround the shaft 8 of the turbine engine 1.

Dans une étape de déplacement 303, l'outil 100 est déplacé axialement vers l'intérieur, i.e. vers la turbomachine, jusqu'à ce que la pièce annulaire 10, 14 regagne sa position initiale dans la turbomachine. Par « position initiale », on entend la position de la pièce annulaire 10, 14 avant le démontage de ladite pièce annulaire 10, 14 de la turbomachine 1.In a displacement step 303, the tool 100 is moved axially inwards, i.e. towards the turbomachine, until the annular part 10, 14 returns to its initial position in the turbomachine. By "initial position" is meant the position of the annular part 10, 14 before the removal of said annular part 10, 14 from the turbine engine 1.

Dans une étape de désengagement 304, les moyens d'accroche et de maintien 102 sont désengagés de la pièce annulaire 10, 14.In a disengagement step 304, the attachment and holding means 102 are disengaged from the annular part 10, 14.

Dans une étape d'extraction 305, l'outil 100 est extrait en le déplaçant axialement vers l'extérieur de la turbomachine 1.In an extraction step 305, the tool 100 is extracted by moving it axially outward from the turbomachine 1.

L'invention n'est évidemment pas limitée aux exemples de réalisation ci-dessus décrits.The invention is obviously not limited to the embodiments described above.

Claims (10)

  1. Tool (100) for dismantling an annular part (10, 14) mounted around a shaft (8) of a turbomachine (1) of X axis, comprising:
    - a support (101) intended to cooperate with a lifting system,
    - means for fastening and maintaining (102) the annular part (10, 14), said fastening and maintaining means (102) being integral with the support (101), the fastening and maintaining means (102) have an opening (1021) suited to receiving the shaft (8) of the turbomachine (1) during the dismantling of the annular part (10, 14),
    characterised in that the fastening and maintaining means (102) are rotationally moveable with respect to the support (101) between a first position (P1) and a second position (P2) by the rotating means to ensure a switching of the X axis of the annular part (10, 14) with respect to the support (101) when the fastening and maintaining means (102) are fixed to the annular part (10, 14).
  2. Dismantling tool (100) according to claim 1, characterised in that:
    - in the first position (P1), the fastening and maintaining means (102) are substantially parallel to the support (101),
    - in the second position (P2), the fastening and maintaining means (102) are substantially perpendicular to the support (101).
  3. Dismantling tool (100) according to one of the preceding claims, characterised in that the rotating means (103) are positioned between the support (101) and the fastening and maintaining means (102).
  4. Dismantling tool (100) according to one of the preceding claims, characterised in that the fastening and maintaining means (102) are arranged on a peripheral portion of the support (101) to allow the rotation of the fastening and maintaining means (102) with respect to the support (101) when the annular part (10, 14) is fixed to the fastening and maintaining means (102).
  5. Dismantling tool (100) according to one of the preceding claims, characterised in that the rotating means (103) comprise locking means suited to maintaining the fastening and maintaining means (102) in the first position (P1) and in the second position (P2).
  6. Dismantling tool (100) according to one of the preceding claims, characterised in that the fastening and maintaining means (102) are formed by a collar (1021) comprising through orifices (105) suited to receiving first fixing means (106).
  7. Dismantling tool (100) according to one of the preceding claims, characterised in that it comprises means for adjusting (104) the centre of gravity of the tool (100).
  8. Dismantling tool (100) according to the preceding claim, characterised in that the adjustment means (104) are formed by:
    - a ring (1041),
    - a worm screw (1042),
    - a control wheel (1043) enabling, by actuating the worm screw (1042), the axial translation of the ring (1041)
  9. Method for dismantling (200) and upkeeping an annular part (10, 14) mounted around a shaft (8) of a turbomachine (1) of longitudinal axis (X) using the tool (100) according to one of the preceding claims, characterised in that it comprises the following steps:
    - positioning (201) the tool (100) opposite the annular part (10, 14) such that the opening (1021) of the fastening and maintaining means (102) is facing a central cavity (20) of the annular part (10, 14), the fastening and maintaining means (102) being maintained in the first position (P1),
    - fixing (202) the fastening and maintaining means (102) on the annular part (10, 14),
    - displacing (203) the tool (100) axially outwards in such a way as to separate the annular part (10, 14) from the remainder of the turbomachine (1),
    - placing (204) the annular part (10, 14), fixed beforehand to the tool (100), on a frame (13) to carry out the upkeep of the annular part (10, 14), the fastening and maintaining means (102) being maintained in the second position (P2).
  10. Method for reassembling (300) an annular part (10, 14) around a shaft (8) of a turbomachine (1) of longitudinal axis (X) using the tool (100) according to one of claims 1 to 8, characterised in that it comprises the following steps:
    - switching (301) the fastening and maintaining means (102) to the first position (P1) by the rotating means (103),
    - positioning (302) the tool (100) fixed to the annular part (10, 14) facing the shaft (8) of the turbomachine (1) such that said shaft (8) can traverse the opening (1021) arranged in the fastening and maintaining means (102),
    - displacing (303) the tool (100) axially until the annular part (10, 14) returns to an initial position around the shaft (8),
    - disengaging (304) the fastening and maintaining means (102) from the annular part (10, 14),
    - extracting (305) the tool (100) from the turbomachine (1) by axially displacing the tool (100) towards the outside of the turbomachine (1).
EP18839813.5A 2017-12-28 2018-12-28 Tool for removing an annular part of a turbomachine Active EP3731998B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1763296A FR3076236B1 (en) 2017-12-28 2017-12-28 TOOL FOR DISASSEMBLING AN ANNULAR PART OF A TURBOMACHINE, METHOD FOR DISASSEMBLY AND ASSEMBLY THEREOF
PCT/FR2018/000276 WO2019129942A1 (en) 2017-12-28 2018-12-28 Tool for removing an annular part of a turbomachine

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EP3731998A1 EP3731998A1 (en) 2020-11-04
EP3731998B1 true EP3731998B1 (en) 2022-10-12

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EP (1) EP3731998B1 (en)
CN (1) CN111511505B (en)
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WO (1) WO2019129942A1 (en)

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CN111102231B (en) * 2019-12-24 2020-11-03 三门核电有限公司 Pump shaft supporting device for online maintenance of large-scale shielding main pump and operation process

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US11187111B2 (en) 2021-11-30
CN111511505B (en) 2022-06-17
CN111511505A (en) 2020-08-07
FR3076236B1 (en) 2019-12-06
FR3076236A1 (en) 2019-07-05
US20210054764A1 (en) 2021-02-25
EP3731998A1 (en) 2020-11-04
WO2019129942A1 (en) 2019-07-04

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