EP1777371A1 - Vorrichtung und Verfahren für die Montage eines Schaufelfusses einer Turbomaschine und eine Turbomaschine mit einer solchen Vorrichtung. - Google Patents

Vorrichtung und Verfahren für die Montage eines Schaufelfusses einer Turbomaschine und eine Turbomaschine mit einer solchen Vorrichtung. Download PDF

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Publication number
EP1777371A1
EP1777371A1 EP06119409A EP06119409A EP1777371A1 EP 1777371 A1 EP1777371 A1 EP 1777371A1 EP 06119409 A EP06119409 A EP 06119409A EP 06119409 A EP06119409 A EP 06119409A EP 1777371 A1 EP1777371 A1 EP 1777371A1
Authority
EP
European Patent Office
Prior art keywords
blade
foot
film
mounting
cell
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.)
Withdrawn
Application number
EP06119409A
Other languages
English (en)
French (fr)
Inventor
Bruno Dambrine
Stéphane Deyber
Jean-Noël Mahieu
Claude Mons
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
SNECMA 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 SNECMA SAS filed Critical SNECMA SAS
Publication of EP1777371A1 publication Critical patent/EP1777371A1/de
Withdrawn legal-status Critical Current

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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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3092—Protective layers between blade root and rotor disc surfaces, e.g. anti-friction layers
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/288—Protective coatings for blades
    • 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
    • F05D2230/90—Coating; Surface treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/50—Bearings
    • F05D2240/54—Radial bearings
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • F05D2300/432—PTFE [PolyTetraFluorEthylene]
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603—Composites; e.g. fibre-reinforced
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/611—Coating

Definitions

  • the invention relates to a method of mounting the foot of a fixed or movable metal turbine engine blade in the cell of a metal support and the assembly for such a mounting.
  • the present invention is not limited to the case where the support of the blade root is constituted by a fan rotor disc, it also encompasses other mounting situations of blades, for example on the rotor disk low pressure compressor, or even in the inlet area of the high pressure compressor.
  • the present invention applies to the case where the support is a housing or a flange supporting fixed vanes.
  • the level of local stresses is very high because of the coefficient of friction at the interface between the walls in contact with the root of the blade and the cell formed of a metal / metal contact.
  • the document US 5,160,243 proposes to use a montage with a metallic foil between a dawn and a disk both in titanium.
  • An object of the invention is to provide another method for mounting a fixed or mobile turbine engine blade, made of metal, in the cell of a metal support, in order to further improve the resistance to contact pressure. between these parts, while allowing a very easy and fast implementation of this process, both during initial assembly and for a repair of the mounting of the foot of the blade.
  • the film replaces the anti-wear metal coating of the prior art.
  • This type of film is already used for mounting the blade roots made of composite material by using a resin-resistant fabric film of resin impregnated fibers.
  • the method according to the invention is both usable during the initial assembly but also for the realization of a repair of the assembly between the foot of a blade and its cell that this assembly was initially made in accordance with the invention or by resorting to a metal anti-wear coating.
  • the film is pre-glued, on the surface or in bulk.
  • the glue is heat-polymerizable and during step b) the assembly comprising at least the root of the blade, the support and the film are placed in an autoclave heated to a temperature allowing the setting of the glue. , for a predetermined minimum duration.
  • step a) the foot of the blade is coated with a metal foil, said non-metallic anti-wear film then being disposed between the click and the cell.
  • the invention also relates to an assembly for mounting the foot of a fixed blade or mobile turbine engine metal in the cell of a metal support, which is reliable, simple and economical to implement and repair.
  • this assembly comprises, between the foot and the cell, at least one non-metallic film comprising polyamide and coated or impregnated with a polymer adhesive.
  • the film is arranged so that the adhesive adheres to the base of the dawn.
  • the film adheres to the surface of the cell of the support.
  • the film comprises glass fibers, polytetrafluoroethylene, in particular Teflon (registered trademark) and / or polyamide, especially in the form of fibers, in particular Kevlar or Nomex (registered trademarks).
  • the non-metallic film advantageously comprises a synthetic fiber fabric. Indeed, there are many types of synthetic fabrics with high wear resistance, and a low coefficient of friction.
  • the glue is heat-polymerizable, which makes it possible to control the moment of taking this glue by placing the assembly in an autoclave brought to a minimum temperature for a predetermined time.
  • the glue is of the resin type and comprises a phenolic resin or polyurethane.
  • the assembly according to the present invention includes the situation in which the root of the blade is directly housed in the cell but also the case where the assembly further comprises at least one foil metal mounted on the foot of the blade, said non-metallic film then being disposed between the click and the cell.
  • the blade root is made of titanium, aluminum or steel or one of their alloys.
  • the support of the blade is made of titanium, aluminum or steel or one of their alloys.
  • the present invention also relates to a turbomachine fan comprising assemblies for mounting the root of a blade according to one of the definitions given above, characterized in that the blades are movable and the support is formed of the rotor disk.
  • the present invention also relates to a turbomachine compressor comprising assemblies for mounting the root of a blade according to one of the definitions given above, characterized in that the blades are movable and the support is formed of the rotor disk.
  • the present invention also relates to a turbomachine compressor comprising assemblies for mounting the root of a blade according to one of the definitions given above, characterized in that the blades are fixed and the support is formed of a flange.
  • Such compressors are in particular turbomachine compressors of low pressure type, but the invention may also relate to blades located at the inlet of a high pressure compressor, at which the temperature reached does not affect the mechanical properties of one of the constituents of the anti-wear layer, namely the film and the glue.
  • the present invention also relates to a turbine engine equipped with sets for mounting the foot of a blade according to one of the definitions given above.
  • FIG. 1 shows the mounting on the disk 10 of a fan or rotor, of a blade 12 whose foot 121 is housed in one of the multiple cavities 101 of the disk 10.
  • each cell 101 has a shape substantially complementary to the shape of the foot 121 of the blade 12 to form a dovetail type mounting.
  • the cells 101 are distributed radially equidistantly along the circumference of the disc 10, being open towards the outside.
  • each foot 121 of a blade 12 has a symmetrical contour with two side walls 122 diverging relative to each other from the body of the blade 12 towards the free end of the foot 121 of the blade 12, to a bottom wall 124 substantially parallel to the axis of rotation and the periphery of the disk 10, and orthogonal to the longitudinal main direction of the corresponding blade 12.
  • the cells 101 have a similar shape with side walls 102 inclined outwards from the circumference towards the inner portion of the disc 10 to a bottom wall 104.
  • the dimensions of the foot 121 of the blade 12 and the cell 101 are such that when the rotor 10 is at rest, the foot 121 is retained in the cell 101, the bottom wall 124 of the foot 121 can then touch the bottom wall 104 of the cell 101.
  • the rotation of the rotor 10 about the central axis causes a movement of the blades 12 radially outwardly due to the centrifugal forces, that is to say in the direction of the arrow 13 in FIG. 1.
  • the side walls 122 of the foot 121 of the blade 12 bear against the lateral walls 102 of the cell 101, which makes it possible to ensure the retention of the blade 12 inside the cell 101, that is to say its connection with the disk 10.
  • the deteriorations of fatigue and wear that occur on the surfaces in contact with the side walls 102 and 122 due to the relative movement between the root 121 of the blade 12 and the cavity 101 of the rotor 10 are reduced by the use of a non-metallic film 20 which coats the entire outer surface of the foot 121.
  • a film 20 is advantageously used, which is advantageously formed of an anti-wear fabric, for example a fabric of the CHEMFAB family of the company Saint-Gobain, made from glass fibers, and / or aramid fibers. such as those known under the trademarks Nomex or Kevlar.
  • This film 20 adheres to the outer surface of the foot 121 with a glue coating or impregnating the film 20, at least on the face of the film 20 to adhere, this adhesive preferably being of the resin type and preferably a phenolic resin or polyurethane.
  • a film 20 made in the pre-bonded anti-wear fabric called Vespel ASB 0664 from the Pont de Nemours company has been successfully used for titanium alloy blades 12 and a titanium alloy disc 10 (fabric composed of fibers of Nomex and Teflon -bricks deposited- pre-glued with phenolic resin), with, as glue, a phenolic resin referenced Plyophen 23057 of the company Durez.
  • This film 20 has a first face coated with a layer of polytetrafluoroethylene as a lubricant and a second face intended to be bonded which has a good bonding surface, the thickness of this film being of the order of a few tenths millimeters.
  • the glue is applied evenly to the second face of the film and this second face of the pre-glued film 20 is disposed on the side walls 122 and the bottom wall 124 of the foot 121 of each blade 12.
  • the assembly formed by the root of the blade 121, the resin and the film 20 during the bonding that is to say the polymerization of the resin, is pressurized.
  • the pressure used is of the order of 7 to 14 MPa. This ensures a good adhesion of the glue on the entire surface and the evacuation of solvents.
  • the polymerization is carried out, which is carried out in the embodiment, at 170 ° C for a period of 1 hour.
  • a crushed film 20 adhered perfectly on the entire surface of the root 121 of the blade 12 so as to guarantee its presence in the zone 14, after assembly as it appears in FIG.
  • the film 20 comprises, on its surface opposite to that which will adhere on the foot 121, a layer of polytetrafluoroethylene (PTFE) which forms a lubricating surface decreasing very significantly the coefficient friction with the surface of the side walls 102 of the cell 101, this coefficient of friction up to 0.1.
  • PTFE polytetrafluoroethylene
  • the blade root 121 can be cleaned to remove excess resin by sanding with glass beads.
  • wear protection by a nonmetallic film allows for easier non-destructive testing of the blade root 121.
  • the use for the film 20 of a technical fabric combining reinforcing fibers (aramid type) and teflon fibers providing lubrication achieves a reduction of the coefficient of friction in the zone 14, thus reducing the forces generated. which is equivalent to an improvement of the mechanical resistance.
  • the film 20 is a technical fabric formed of a fabric of glass fibers and / or polyamide fibers, advantageously comprising polytetrafluoroethylene.
  • This technique can also be implemented, in a variant, by bonding the non-metallic film 20 to the wall of the cell 101 (case not shown).
  • the method according to the invention is both usable during the initial assembly but also for the realization of a repair of the assembly between the foot 121 of a blade 12 and its cell 101 that this assembly has initially made according to the invention or although having previously used a metal coating anti wear.
  • the film can be applied for repair on the old metal coating after a preliminary treatment consisting in sandblasting and cleaning said coating or after complete removal of this old metal coating.
  • the polymer film 20 is bonded to a metal foil 22, made for example of nickel base superalloy or stainless steel.
  • the foil 22 is a curved sheet which has in cross section the shape of a U whose branches are broken in two portions at an obtuse angle turned towards the inside of the U. This shape approaches that of the foot 121 of the dawn 121 so that the end sections of the U branches of the foil cover the zone 14 of contact between the foot 121 and the cell 101.
  • the film 20 covers the entire outer surface of the foil 22.
  • the film 20 covers only the entire surface of the wall of the cell 101, or at the same time all the outer surface of the foil 22 and the entire surface of the wall of the wall. cell 101 or only a region comprising at least the zone 14 of one or the other or both of these surfaces.
  • this mounting variant is very similar to that described previously with reference to FIG. 1, the only difference being the presence of the foil 22. Again, it is understood that the film can be put in place. According to the present invention either on a new uncoated foil 22, or on a foil 22 already used and coated (with or without the removal of this conventional metal coating) as well as on repairing part or all of the foil surface. previously coated with such a film 20.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP06119409A 2005-08-26 2006-08-23 Vorrichtung und Verfahren für die Montage eines Schaufelfusses einer Turbomaschine und eine Turbomaschine mit einer solchen Vorrichtung. Withdrawn EP1777371A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0508768A FR2890126B1 (fr) 2005-08-26 2005-08-26 Ensemble et procede pour le montage du pied d'une aube de turbomachine, soufflante, compresseur et turbomachine comportant un tel ensemble

Publications (1)

Publication Number Publication Date
EP1777371A1 true EP1777371A1 (de) 2007-04-25

Family

ID=36698666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06119409A Withdrawn EP1777371A1 (de) 2005-08-26 2006-08-23 Vorrichtung und Verfahren für die Montage eines Schaufelfusses einer Turbomaschine und eine Turbomaschine mit einer solchen Vorrichtung.

Country Status (7)

Country Link
US (1) US20070048142A1 (de)
EP (1) EP1777371A1 (de)
JP (1) JP2007064220A (de)
CN (1) CN1920259A (de)
CA (1) CA2557109A1 (de)
FR (1) FR2890126B1 (de)
RU (1) RU2006130731A (de)

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JP6778147B2 (ja) * 2017-05-31 2020-10-28 三菱重工業株式会社 複合材料翼及び複合材料翼の製造方法
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JP7236316B2 (ja) * 2019-04-17 2023-03-09 三菱重工業株式会社 複合材翼及び複合材翼の成形方法
CN113833691A (zh) * 2020-06-08 2021-12-24 中国航发商用航空发动机有限责任公司 一种风扇组件及涡轮风扇发动机
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Also Published As

Publication number Publication date
US20070048142A1 (en) 2007-03-01
RU2006130731A (ru) 2008-02-27
CA2557109A1 (fr) 2007-02-26
JP2007064220A (ja) 2007-03-15
CN1920259A (zh) 2007-02-28
FR2890126A1 (fr) 2007-03-02
FR2890126B1 (fr) 2010-10-29

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