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
• • 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
  • F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
  • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
  • C23C4/06—Metallic material
  • C23C4/073—Metallic material containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
  • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
  • C23C4/129—Flame spraying
• • 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
  • F01D5/02—Blade-carrying members, e.g. rotors
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/26—Rotors specially for elastic fluids
  • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
  • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
  • F04D29/322—Blade mountings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/26—Rotors specially for elastic fluids
  • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
  • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
  • F04D29/324—Blades
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/26—Rotors specially for elastic fluids
  • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
  • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
  • F04D29/329—Details of the hub
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/26—Rotors specially for elastic fluids
  • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
  • F04D29/34—Blade mountings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/26—Rotors specially for elastic fluids
  • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
  • F04D29/38—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
  • F05D2220/00—Application
  • F05D2220/30—Application in turbines
• • 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
  • F05D2230/30—Manufacture with deposition of material
  • F05D2230/31—Layer deposition
  • F05D2230/311—Layer deposition by torch or flame spraying
• • 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
  • F05D2240/20—Rotors
  • F05D2240/24—Rotors for turbines
• • 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
  • F05D2300/10—Metals, alloys or intermetallic compounds
  • F05D2300/17—Alloys
  • F05D2300/177—Ni - Si alloys
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T50/00—Aeronautics or air transport
  • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

• the present disclosure relates to a paddle rotor.
• Such a rotor can be used in a turbomachine, on land or aeronautics, and more particularly in an airplane turbojet engine.
• a rotor in the particular case of an aircraft turbojet, it may be a fan rotor, compressor or turbine.
• the axial direction corresponds to the direction of the axis of rotation of the rotor, and a radial direction is a direction perpendicular to this axis.
• an axial plane is a plane containing the axis of rotation of the rotor, and a radial plane is a plane perpendicular to this axis.
• the adjectives "inner” and “outer” are used with reference to a radial direction so that the inner (ie radially inner) part of an element is closer to the axis of rotation than the outer part (ie radially outer) of the same element.
• upstream and downstream are defined with respect to the normal flow direction of the fluid (from upstream to downstream) between the rotor blades.
• the present disclosure relates to a blade rotor comprising a disk forming the central portion of the rotor, and vanes mounted on the disk at the outer periphery thereof.
• the blades are attached to the disk by fastening systems, where the root of the blade forms the male portion of the system and is retained radially in the female portion of the system which is formed at the outer periphery of the disk. This female part is commonly called "alveolus".
• the root of the blade and the disk cavity may be inclined relative to the axial direction.
• the cell opens on the outer peripheral face of the disk but also on at least one of the axial end faces - called front faces - of the disk, thus forming a frontal opening.
• the blade is usually mounted on the disk by sliding it into the cell via the front opening.
• the present disclosure relates to a paddle rotor comprising:
• a rotor disc having two end faces and an outer peripheral face, cells being arranged in the outer peripheral face and opening on at least one of the end faces, and
• blades each having a foot through which the blade is fixed in a cell, an end face of the foot being substantially level with the front face of the disk when the blade is fixed in the cell.
• a coating layer is deposited on the disc so as to cover, at the same time, at least a portion of the front face of the disc and at least a portion of the end face of the foot.
• the deposited coating thus establishes a connection between the blade and the disk, this connection for axially retaining the blade relative to the disk.
• the end face of the foot is "substantially" flush with the front face of the disc, which means that the end face can be exactly level with the front face of the foot, but not necessarily.
• An offset can exist between these faces. This offset may, if necessary, be compensated by an extra thickness or an under-thickness of the coating layer.
• the proposed solution may have one or more of the following characteristics considered individually or in technically possible combinations:
• the coating layer is deposited by thermal spraying, in particular by plasma spraying, electric arc projection or flame projection.
• the coating layer is deposited by supersonic flame thermal spraying, in particular by HVOF projection (for "High Velocity Oxy-Fuel”), HVAF projection (for "High Velocity Air-Fuel”) or hybrid projection.
• HVOF projection for "High Velocity Oxy-Fuel”
• HVAF projection for "High Velocity Air-Fuel”
• hybrid projection for "High Velocity Air-Fuel”
• the coating is a nickel base alloy.
• the coating is an alloy MCrAIY type or M corresponds to the element Fe, Ni, Co or a mixture of these elements.
• the coating can thus be a NiCoCrAlYTa type alloy.
• the thickness of the coating layer is between 0.5 and 1 mm.
• the present disclosure also relates to a turbomachine comprising a rotor with blades as previously described.
• FIG. 1 partially shows, in perspective, an exemplary rotor according to the present disclosure.
• FIG 2 is a sectional view of the rotor of FIG 1 along plane II-II.
• FIG. 1 partially represents an example of a rotor with an axis of rotation A.
• This rotor 10 comprises a disk 12 having an upstream end face 14 and a downstream end face 15, axially opposed to the upstream face 14. These end faces are called “front faces" in the present disclosure. They extend substantially radially with respect to the axis A.
• the disc 12 also has an outer peripheral face 16 extending between the end faces.
• the cells 18 are formed in the outer periphery face 16. These cells 18 form grooves on the outer surface of the disk 12. These grooves may be straight or curved, parallel or inclined relative to the axis A. They open on the face outer periphery 16 forming a slot. In addition, they open on the upstream end face 14 and / or the downstream end face forming an opening 20.
• the disc 12 also includes blades 30 mounted at its periphery. Each blade 30 has a foot 32 surmounted by a blade 34. In the example, a platform 36 extends circumferentially to the base of the blade 34. When the blades 30 are fixed on the disc 12, their platforms 36 are arranged edge to edge to form a rotating ring delimiting a surface of revolution about the axis A of rotation of the disk. This crown has, in particular, the function of delimiting the inner surface of the flow passage of the fluid circulating between the blades 34.
• the blades 30 are fixed to the disk 12 by their foot 32, which is housed in a cell 18.
• the shape of the foot 32 may be complementary to that of the cell 18, as in the example shown where the foot 32 has a fir-shaped cross section. Other shapes may, however, be used such as, for example, a dovetail shape.
• the shape of the foot 32 may be complementary to only a part, in particular the upper part, of the cell 18. This is the case, for example, when a shim is placed between the foot 32 and the bottom of the cell 18.
• the foot 32 extends from its upstream end face 31 to its downstream end face 33 following the same pattern as the cell 18. When the blade 30 is fixed in the cell 18, the face of end 31 of the foot 32 is at the opening 20 and the front face 14 of the disc 12.
• a coating layer 40 is deposited by thermal spraying on a portion of the front face 14 of the disc so that the coating 40 also covers part of the end face 31 of the foot 32. In other words the coating 40 is straddling between the end face 14 and the end face 31.
• an annular coating layer 40 is deposited on the end face 14 so as to cover the lower part or inner part of the openings 20 and, Therefore, the inner portion of the end faces 31. The coating 40 thus establishes a physical connection between the disc 12 and the blade 30, this connection being sufficiently resistant to oppose the axial movement of the blade 30 relative to the disc 12.
• the strength of the bond created depends on the inherent strength of the coating 40 but also on the adhesion of the coating 40 to the disc 12 and the blade 30.
• the fact of depositing the coating 40 by thermal spraying - in particular by thermal spraying by supersonic flame and, for example, by spraying HVOF - contributes both to the good mechanical strength of the deposited coating 40 and to the adhesion thereof on the disk 12 and the blade 30.
• the adhesion of the coating 40 also depends on the affinity between the coating material and that of the disc 12 and the blade 30.
• the coating 40 may be a nickel base alloy, for example of MCrAIY type, these materials having a good affinity.
• the mechanical strength of the coating layer 40 also depends on its thickness. In practice, a layer thickness of between 0.5 and 1 mm is a good compromise between mechanical strength and economy of material.
• Another coating layer 41 may be deposited in the same manner as the coating layer 40, on the downstream end face 15 and the end face 33 of the foot 32. This coating layer 41 may be deposited in addition to the diaper 40, as in the example shown, where to constitute an alternative to the coating layer 41.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Plasma & Fusion (AREA)
• Physics & Mathematics (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Turbine Rotor Nozzle Sealing (AREA)
• Coating By Spraying Or Casting (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Publications (1)

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ID=50424451

Family Applications (1)

Country Status (11)

Families Citing this family (3)

Citations (4)

Family Cites Families (12)

• 2013
  • 2013-12-06 FR FR1362237A patent/FR3014477B1/fr not_active Expired - Fee Related
• 2014
  • 2014-11-28 JP JP2016536700A patent/JP2017502191A/ja active Pending
  • 2014-11-28 CN CN201480066233.XA patent/CN105814281B/zh not_active Expired - Fee Related
  • 2014-11-28 RU RU2016126823A patent/RU2660985C1/ru active
  • 2014-11-28 CA CA2932004A patent/CA2932004C/fr active Active
  • 2014-11-28 WO PCT/FR2014/053071 patent/WO2015082808A1/fr not_active Ceased
  • 2014-11-28 PL PL14814983T patent/PL3077626T3/pl unknown
  • 2014-11-28 ES ES14814983.4T patent/ES2640513T3/es active Active
  • 2014-11-28 KR KR1020167018186A patent/KR20160097271A/ko not_active Ceased
  • 2014-11-28 US US15/101,211 patent/US10858946B2/en not_active Expired - Fee Related
  • 2014-11-28 EP EP14814983.4A patent/EP3077626B1/fr active Active

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