EP3443202B1 - Klinge und verfahren zur erneuerung einer abreibbaren beschichtung - Google Patents

Klinge und verfahren zur erneuerung einer abreibbaren beschichtung Download PDF

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Publication number
EP3443202B1
EP3443202B1 EP17721425.1A EP17721425A EP3443202B1 EP 3443202 B1 EP3443202 B1 EP 3443202B1 EP 17721425 A EP17721425 A EP 17721425A EP 3443202 B1 EP3443202 B1 EP 3443202B1
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EP
European Patent Office
Prior art keywords
blade
resin
rotor
housing
blades
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
EP17721425.1A
Other languages
English (en)
French (fr)
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EP3443202A1 (de
Inventor
Michael ISEMENE
Alexandre Branco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
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Safran Aircraft Engines SAS
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Publication date
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Publication of EP3443202A1 publication Critical patent/EP3443202A1/de
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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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
    • F01D11/12—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part
    • F01D11/122—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part with erodable or abradable material
    • 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
    • F01D5/14—Form or construction
    • F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
    • 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
    • F01D5/14—Form or construction
    • F01D5/20—Specially-shaped blade tips to seal space between tips and stator
    • 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
    • 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
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/36—Application in turbines specially adapted for the fan of turbofan engines
    • 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
    • F05D2230/80—Repairing, retrofitting or upgrading methods
    • 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
    • F05D2240/55—Seals
    • 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
    • F05D2300/44—Resins

Definitions

  • the present invention relates to a blade and a method of recharging an abradable layer on an internal surface of a turbomachine casing intended to surround the blade.
  • a turbomachine comprises rotor blades which rotate inside casings. It is known to provide on the internal surface of such a casing a layer of abradable material with which the ends of the blades are intended to cooperate by friction to limit the flow of non-functional leakage air between these ends and the casing, and thus optimizing the performance of the turbomachine.
  • the abradable layer is intended to wear out by friction as mentioned above. When it is too worn or when it is damaged for example by impacts from foreign bodies, it must be repaired to maintain the performance expected from the turbomachine.
  • the present invention provides a simple, effective and economical solution to this problem.
  • the invention provides a blade, in particular a fan, for recharging an abradable layer on an internal surface of a turbomachine casing intended to surround the blade, the blade comprising a foot and a blade having a vertex opposite to said base, the base comprising a housing for storing or passing a polymerizable resin for recharging, and the blade comprising longitudinal conduits whose first ends are connected to said housing and whose opposite ends open at said summit.
  • the invention is particularly advantageous because it uses a blade for reloading an abradable layer.
  • This blade is in fact configured to be able to deposit or spray reloading resin during the rotation of the rotor which supports this blade. Under the effect of centrifugal forces, the resin is intended to move from the housing to the conduits and then to the top of the blade, to be then deposited or sprayed on the housing.
  • the recharging of the layer can be carried out under wing without removing the turbomachine and therefore with a limited time of immobilization of the aircraft.
  • the method comprises a step consisting in spreading and scraping the deposited resin, by means of said member.
  • rotor blades are replaced by blades as described above, which are regularly distributed around the axis of rotation of the rotor.
  • the figure 1 partially shows a fan 10 of a turbomachine, such as an aircraft turbojet engine.
  • a turbomachine comprises from upstream to downstream, that is to say in the direction of flow of the gas flows, a blower, one or more compressors, a combustion chamber, one or more turbines, and a combustion gas ejection nozzle leaving the turbine (s).
  • the fan 10 is therefore located at the upstream end of the turbomachine. It comprises a rotor 12 comprising a hub 14 carrying an annular row of vanes 16, known as fan blades, the rotor 12 rotating inside a retention casing 18.
  • the rotor 12 comprises, at its outer periphery, an annular row of feet mounting cells 20 for the blades 16.
  • Each cell 22 generally has a dovetail shape in section and each blade foot has a shape complementary to the alveolus to allow mounting of the blade by fitting its foot into the alveolus.
  • a wedge can be inserted between the foot of a blade and the bottom of the socket 22 for receiving this foot, in order to immobilize it.
  • Each blade 16 comprises a blade 24 which extends from the base radially outwards with respect to the axis A of rotation of the rotor 12.
  • the blade comprises a vertex opposite to the base, that is to say at its radially outer end.
  • the retention casing 18 has here a generally cylindrical shape and extends around the fan blades 16. It comprises an internal cylindrical surface on which an annular layer 26 of abradable material is provided. This layer 26 surrounds the blades 16 and extends over the entire longitudinal dimension of the blades along the axis A.
  • the fan rotor 12 is located downstream of an inlet cone 28, which may be integral with the rotor 12, and upstream of an annular separator 30 which has the function of dividing the annular air inlet vein which crosses the fan blades, into two coaxial annular veins, respectively internal for the generation of a primary flow or hot flow, and external for the generation of a flow secondary or cold flow.
  • the invention relates to a blade for reloading an abradable layer on the internal surface of a casing such as the casing 18 of the figure 1 .
  • Foot 20 of dawn 12 comprises a housing 32 for storing or passing a polymerizable resin for recharging.
  • this housing 32 can either be connected to a resin source and distribute the resin to the rest of the blade, or form the resin source itself. In the latter case, the housing 32 can directly contain the resin or be designed to receive a resin cartridge.
  • the resin may be of the two-component type and thus comprise two components, such as a resin component and a hardener component, intended to be mixed and to cure by polymerization, for example at room temperature.
  • the epoxy-based resin sold by the company 3M under the name Scotch-Weld TM is suitable for example for this application.
  • the blade 24 of the blade 16 comprises several channels 34 for conveying the resin to the top of the blade.
  • These channels are longitudinal, that is to say they extend along the longitudinal axis of the blade, which is a substantially radial axis relative to the axis A.
  • the channels 34 are preferably substantially straight to facilitate the aforementioned route. They have for example a diameter of a few millimeters, this diameter being naturally a function of the viscosity of the resin at its temperature of use.
  • the conduits 34 extend between the housing 32 and the top of the blade 24.
  • the radially internal ends of the conduits 34 open into the housing 32 and their radially external ends open on a radially external end surface 36 of the blade, which is intended to be opposite the abradable layer 26.
  • the figures 2 and 4 show in more detail the end surface 36 as well as the outlets 39 of the conduits 34 on this surface 36.
  • the number of internal conduits in the blade can be relatively high. They can be grouped by group, as shown in the figure 4 .
  • the conduits 34 can be distributed over the surface and be aligned along a blade of the blade.
  • the top of the blade 16 is advantageously fitted with a spreading and scraping member 38, which is applied and fixed to the end surface 36.
  • the member 38 has an elongated shape and is intended to extend along the chord of the blade. It is advantageously fixed removably on the blade, for example by interlocking or elastic snap-fastening.
  • the member 38 comprises pins 40 or clips intended to cooperate with orifices 42 provided at the top of the blade and opening onto the surface 36, these pins being visible at the figure 5 .
  • This figure shows an exemplary embodiment of the member 38 which comprises a cavity 44 intended to be in fluid communication with the outlets 39 of the conduits 34 for its supply of resin.
  • the member 38 may comprise a radially internal bottom wall pierced with orifices intended to be aligned with the outlets 39 of the conduits, when the member is mounted on the blade.
  • the member 38 further comprises at least one resin distribution channel 46 extending from the cavity 44 towards a radially external end of the member 38. This end is preferably configured to spread the resin and scrape off the excess resin. . It is shaped to reproduce the theoretical profile of the air intake duct of the fan.
  • the method comprises a step consisting in spreading and scraping the deposited resin, by means of this member.
  • blades 16 are replaced by blades 16.
  • These blades 16 are preferably regularly distributed around the axis of rotation of the rotor, the other blades, of origin, of the rotor not being shown in the figure for clarity.
  • a pump is used to force the resin to flow from the housing of each blade along its internal conduits.
  • the pump can be adjusted to a pressure of 150 bars and the blower can be rotated, for example manually or by auto-rotation, when the pump is started.
  • the resin is forced to flow in the conduits by the only centrifugal force applied due to the rotation of the blower, for example at a speed of about 500 revolutions / minute.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (9)

  1. Schaufel (16), insbesondere eines Gebläses für die Erneuerung einer abreibbaren Beschichtung (26) auf einer inneren Oberfläche eines Gehäuses (18) einer Turbomaschine, das dazu bestimmt ist, die Schaufel zu umgeben, wobei die Schaufel einen Fuß (20) und eine Schaufel (24) umfasst, die einen Scheitel entgegengesetzt zum Fuß aufweist, wobei der Fuß eine Aufnahme (32) zur Aufbewahrung oder zum Durchgang eines polymerisierbaren Erneuerungsharzes umfasst, und die Schaufel Längsleitungen (34) umfasst, deren erste Enden mit der Aufnahme verbunden sind und deren entgegengesetzte Enden in den Scheitel münden.
  2. Schaufel (16) nach Anspruch 1, wobei es eine Reihe von Längskanälen (34), im Wesentlichen entlang einer Sehne der Schaufel ausgerichtet, umfasst.
  3. Schaufel (16) nach Anspruch 1 oder 2, wobei sie weiter ein Kratzorgan (38) umfasst, das am Scheitel befestigt ist.
  4. Schaufel (16) nach dem vorstehenden Anspruch, wobei das Organ (38) abnehmbar, beispielsweise durch Einstecken, an dem Ende befestigt ist.
  5. Schaufel (16) nach Anspruch 3 oder 4, wobei das Organ (38) eine längliche Form aufweist und sich entlang einer Sehne der Schaufel erstreckt.
  6. Schaufel (16) nach einem der Ansprüche 3 bis 5, wobei das Organ (38) einen Hohlraum (44) in Fluidverbindung mit Einmündungen der Leitungen für dessen Versorgung mit Harz umfasst, und sich mindestens ein Kanal (46) zur Harzverteilung aus dem Hohlraum zu einem Ende des Organs entgegengesetzt zum Fuß erstreckt.
  7. Verfahren zur Erneuerung einer abreibbaren Beschichtung auf einer inneren Oberfläche eines Gehäuses, insbesondere eines Gebläses, einer Turbomaschine, die folgenden Schritte umfassend:
    - Demontieren mindestens einer Schaufel eines Rotors der Turbomaschine, und Ersetzen dieser durch eine Schaufel (16) nach einem der vorstehenden Ansprüche,
    - In-Drehung-Versetzen des Rotors derart, dass das in der Aufnahme enthaltene Harz durch Zentrifugalwirkung in den Leitungen zirkuliert und auf der Oberfläche abgeschieden oder projiziert wird.
  8. Verfahren nach Anspruch 7, wobei die Schaufel (16) wie nach einem der Ansprüche 3 bis 5 definiert ist, wobei es einen Schritt umfasst, der darin besteht, das abgeschiedene Harz anhand des Organs zu verteilen und zu kratzen.
  9. Verfahren nach Anspruch 7 oder 8, wobei mehrere, beispielsweise vier, Schaufeln des Rotors durch Schaufeln (16) nach einem der Ansprüche 1 bis 6 ersetzt werden, die regelmäßig um die Drehachse des Rotors herum verteilt sind.
EP17721425.1A 2016-04-12 2017-04-10 Klinge und verfahren zur erneuerung einer abreibbaren beschichtung Active EP3443202B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1653220A FR3049978B1 (fr) 2016-04-12 2016-04-12 Aube et procede de rechargement d'une couche d'abradable
PCT/FR2017/050862 WO2017178747A1 (fr) 2016-04-12 2017-04-10 Aube et procede de rechargement d'une couche d'abradable

Publications (2)

Publication Number Publication Date
EP3443202A1 EP3443202A1 (de) 2019-02-20
EP3443202B1 true EP3443202B1 (de) 2020-04-01

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Application Number Title Priority Date Filing Date
EP17721425.1A Active EP3443202B1 (de) 2016-04-12 2017-04-10 Klinge und verfahren zur erneuerung einer abreibbaren beschichtung

Country Status (5)

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US (1) US10982560B2 (de)
EP (1) EP3443202B1 (de)
CN (1) CN109072707B (de)
FR (1) FR3049978B1 (de)
WO (1) WO2017178747A1 (de)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346175A (en) * 1966-04-01 1967-10-10 Gen Motors Corp Plastic coating for compressors
GB0100695D0 (en) * 2001-01-11 2001-02-21 Rolls Royce Plc a turbomachine blade
US7252478B2 (en) * 2004-07-21 2007-08-07 Delta T Corporation Fan blade modifications
CN101027486A (zh) * 2004-09-28 2007-08-29 大金工业株式会社 摩擦部件及流体机械
CN2742187Y (zh) * 2004-10-12 2005-11-23 大庆石油管理局 抗磨损多级离心泵
US7410342B2 (en) * 2005-05-05 2008-08-12 Florida Turbine Technologies, Inc. Airfoil support
US9133726B2 (en) * 2007-09-17 2015-09-15 United Technologies Corporation Seal for gas turbine engine component
GB0911330D0 (en) * 2009-07-01 2009-08-12 Rolls Royce Plc Actuatable seal for aerofoil blade tip
CN101825111A (zh) * 2010-02-09 2010-09-08 于风福 一种耐磨损风机
US20150192029A1 (en) * 2012-09-20 2015-07-09 General Electric Company Turbomachine blade tip insert
FR3007063B1 (fr) * 2013-06-13 2015-07-03 Composite Ind Piece de materiau abradable pour la fabrication d'un secteur de joint annulaire abradable pour turbomachine et procede de fabrication d'une telle piece
US10408224B2 (en) * 2014-01-23 2019-09-10 United Technologies Corporation Fan blades with abrasive tips

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3443202A1 (de) 2019-02-20
US10982560B2 (en) 2021-04-20
CN109072707A (zh) 2018-12-21
FR3049978A1 (fr) 2017-10-13
CN109072707B (zh) 2021-05-25
WO2017178747A1 (fr) 2017-10-19
FR3049978B1 (fr) 2018-04-27
US20190120074A1 (en) 2019-04-25

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