WO2014140449A1 - Soufflante de turbomoteur a flux multiple, et turbomoteur equipe d'une telle soufflante - Google Patents
Soufflante de turbomoteur a flux multiple, et turbomoteur equipe d'une telle soufflante Download PDFInfo
- Publication number
- WO2014140449A1 WO2014140449A1 PCT/FR2014/050472 FR2014050472W WO2014140449A1 WO 2014140449 A1 WO2014140449 A1 WO 2014140449A1 FR 2014050472 W FR2014050472 W FR 2014050472W WO 2014140449 A1 WO2014140449 A1 WO 2014140449A1
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- WIPO (PCT)
- Prior art keywords
- blades
- disk
- fan
- damping
- disc
- Prior art date
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Classifications
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- 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
- F01D5/26—Antivibration means not restricted to blade form or construction or to blade-to-blade connections or to the use of particular materials
-
- 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
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
-
- 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
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
- F01D1/06—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines traversed by the working-fluid substantially radially
-
- 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
-
- 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
- F01D11/005—Sealing means between non relatively rotating elements
- F01D11/006—Sealing the gap between rotor blades or blades and rotor
- F01D11/008—Sealing the gap between rotor blades or blades and rotor by spacer elements between the blades, e.g. independent interblade platforms
-
- 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
-
- 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
- F01D5/32—Locking, e.g. by final locking blades or keys
-
- 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
- F01D5/32—Locking, e.g. by final locking blades or keys
- F01D5/323—Locking of axial insertion type blades by means of a key or the like parallel to the axis of the rotor
-
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
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- 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
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- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- 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
- F05D2220/34—Application in turbines in ram-air turbines ("RATS")
-
- 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
- F05D2230/60—Assembly methods
- F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
- F05D2230/644—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins for adjusting the position or the alignment, e.g. wedges or eccenters
-
- 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
- F05D2240/35—Combustors or associated equipment
-
- 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
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
-
- 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
- F05D2260/00—Function
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
Definitions
- Multi-flow turbine engine blower and turbine engine equipped with such a blower.
- the present invention relates to a multi-flow turbine engine fan, in particular, a twin-jet aircraft turbojet fan.
- a double-body turbojet comprises, from upstream to downstream in the direction of flow of the gases, a fan in a housing, a compressor, a combustion chamber, a turbine and an exhaust nozzle.
- the two bodies, low pressure and high pressure rotate independently of each other and are coaxial with the longitudinal axis of the turbojet engine.
- compressor is meant a low pressure compressor, upstream of a high pressure compressor, and by turbine, a high pressure turbine upstream of a low pressure turbine.
- internal or external, or internal or external we will hear, in the description, internal or external, or inside or outside, the motor, radially, with respect to its longitudinal axis.
- the blower is located upstream of the low pressure compressor in front of the low pressure body, and receives the entire flow of air entering the engine, inside a nacelle.
- the fan comprises a fan disk provided, at its outer periphery, with radial vanes and internally connected, during operation of the turbojet engine, to the low pressure drive shaft of the corresponding turbine-compressor assembly.
- Each radial blade comprises, from the outside to the inside, a blade located in the air flow, and a foot with a heel arranged to engage in a usual way in an alveolus or axial groove formed in the outer periphery of the blower disk.
- Platforms, from which protrude outwardly the blades, are interposed between them and laterally extend the hood or conical upstream nose of the fan to the drum or rotor of the low pressure compressor.
- the blades are engaged, by the heels ending their feet, in the axial receiving cavities of the disk with a certain angular displacement (1 to 2 °) in the radial plane.
- the blades are struggling freely in their respective axial recesses at each rotation of the blower and this especially when the platforms are reported to the blades and, therefore, not integrated with the latter.
- document EP 0081416 discloses a device for damping airfoil fan blades of pneumatic type from inflatable wedges.
- the present invention aims to overcome these disadvantages and to provide a simple and effective solution to the problem of wear between the blades of the fan and the upstream flange of the compressor drum.
- the present invention relates to a multi-flow turbine engine fan, comprising a fan disk adapted to be driven in rotation about a longitudinal axis and provided, at the outer periphery, with radial vanes each comprising a foot s' slidably engaging a groove of the disc, and externally thereto, a blade, platforms surrounding the disc being interposed between the radial vanes, and damping wedges provided in respective cavities delimited by the outer surface of the disc; disk, the feet of the blades and the platforms.
- such a fan is remarkable in that the damping wedges are arranged tangentially at the outer periphery of said disk, close to the outer surface thereof, between two adjacent radial blade roots, are are elastically deformable, and have a tangential width at least equal to the distance separating two adjacent blades at the periphery of the disc, so that each wedge is in tangential contact by compression of the two adjacent blades, a fixed support being provided in each cavity housing a wedge to maintain radially in position the latter.
- the angular displacement of the latter is limited, or even eliminated, so that, in autorotation of the fan, the blades remain substantially in position in the grooves, which eliminates or at least greatly reduces the relative sliding of the blades relative to the upstream flange of the drum with, consequently, the appearance and progression of wear.
- the wedges being always slightly elastically deformed by compression between two consecutive blades, to immobilize them in position, the angular displacement of said blades at the origin of the problems is thus taken up and absorbed directly by the wedges, without further altering the production of the parts ( disk and blades) of the blower, or that of the drum.
- the usual vibratory damping devices of the fan blades used when the fan is rotated by the low-pressure turbine-compressor shaft, do not deal with the problems described above when the fan is in the autorotation, and are therefore totally ineffective towards them.
- the tangential damping wedges of the invention advantageously contribute to reducing the vibratory levels of the blade blades by adding damping during the phases of operation of the turbine engine, with the drive shaft coupled to the fan.
- the damping wedges are provided between all the blades of the disk.
- the elastically deformable damping shims are made of a synthetic or natural polymer material, such as an elastomer, and have a hardness in the range of 60 to 90 Shore.
- each support is fixed, on one side, by a first fixing member associating the disc to a connecting flange of a compressor drum and, on the other side, by a second fastener associating the disc. to the corresponding platform.
- each support is in the form of an inverted U-shaped stirrup between the wings of which the damping wedge is arranged and which engages between two external radial tabs of the disc cooperating respectively with a medial radial lug of the corresponding platform. and with the flange, said damping wedge tangentially protruding from said U-shaped support to be in contact with the two adjacent blade roots.
- each elastically deformable cushioning shim has an oblong, elliptical or similar shape, having rounded, opposite lateral edges engaging the respective feet of the adjacent blades by compression. With such rounded edges, it is safe to have a prestressed contact with the side faces facing the blade roots.
- a metal plate is attached to the outer face of each damping wedge.
- the plate is overmolded to the damping wedge.
- Each damping wedge may comprise at its axial ends counterbores for receiving parts of fixing members of the wedge to the disc.
- the invention also relates to a double-shaft turbine engine comprising, from upstream to downstream in the direction of flow of the gases, a fan, a compressor, a combustion chamber, a turbine and an exhaust nozzle.
- the fan is of the type defined above.
- FIG. 1 schematically shows, in axial or longitudinal half-section, the front blower and low-pressure compressor part of a turbine engine, such as an aircraft turbojet engine.
- FIGS. 2 and 3 are, respectively, an enlarged view of the bladed disc of the blower of FIG. 1 and a cross-sectional view along the line A-A of FIG. 2, showing the arrangement of one of the cleats of FIG. damping of the invention between two adjacent blades of the fan disk.
- FIGS. 4 and 5 are fragmentary and cut-away perspective views of the fan disk in two distinct directions, showing the arrangement and attachment of one of the damping wedges between the fan disk and the low compressor drum. pressure.
- Figure 6 is an enlargement of the attachment of the damping wedge relative to the fan disk and the compressor drum.
- the front part 1 of the turbojet engine 2 with a double flow comprises from upstream to downstream in the direction of flow of the intake airflow F, with respect to the longitudinal axis A of the engine, a 3 blower housed in an outer casing or nacelle 4, and a low-pressure compressor 5 extending integrally in rotation the blower.
- the compressor is surrounded by a fixed cylindrical body 6 which separates the flow F into a primary flow FP with the nacelle, and into a seperate flow.
- FS condenser through the blades 7 of the low-pressure compressor 5.
- a high pressure compressor In part downstream of the latter, and therefore not shown in Figure 1, there are successively and in the usual manner, a high pressure compressor, a combustion chamber, high turbines and low pressure and ejection nozzle.
- the fan 3 mainly comprises, with reference to FIGS. 1 and 2, a fan disk 8 which is rotated during the taxiing and flight phases of the aircraft by a low pressure shaft 9 driven by the turbine. low pressure, and a plurality of radial vanes 10 carried by the disk and evenly distributed from each other around the outer periphery 19 of the disk.
- Each radial blade 10 comprises a blade 1 1 in the flow F and a foot 12.
- fan platforms 14 are interposed between the radial vanes 10 and are attached to the fan to ensure, inter alia, the surface continuity between a conical cap 15 ending upstream of the fan 3 and a drum or rotor 16 of the low pressure compressor. These platforms 14 thus surround the disk 8 while being at a radial distance therefrom.
- the blades 1 1 are radially located outside the platforms 14, while the feet 12 of the blades are located under the platforms.
- the feet 12 terminate in engagement stubs 17 with receiving cavities or grooves 18, arranged parallel to the axis A of the disc and opening outwards from the periphery or outer surface 19 of the disc.
- These heels have a shape of dovetail or bulb to cooperate with the cells in the manner of a tenon-mortise connection.
- the radial vanes 10 have, relative to the cells 18, an angular clearance in the radial plane of the fan, admittedly limited, less than 1 or 2 °, necessary for their mounting.
- the disc 8, the platforms 14 and the cover 15 of the blower are made integral with each other, as well as with the drum 16 of the compressor for the disc and platforms.
- the fan disk 8 is fixed, on the one hand, to the drum 16 by first fasteners 20 (such as bolts) assembling outer radial tabs downstream 21 from the disc to the transverse face 22 of an upstream connecting flange 23 of the drum, the members 20 pass through coaxial holes provided in the legs and the upstream flange.
- first fasteners 20 such as bolts
- second fastening members 24 such as fixing pins
- external radial tabs 25 located in the middle portion of the disc and at the periphery 19 of the disc, to the ears. (or tabs) internal radial 26 located in the middle part of the platforms 14.
- the members 24 engage in coaxial holes corresponding legs and ears.
- the platforms 14, here attached to the disc and not integrated therewith, are further attached to the upstream flange 23 of the drum by third fasteners 27 (bolts or the like).
- Third radial lugs 28 downstream of the platforms are arranged facing the upstream flange to be fixed to this flange by the members 27 engaging in respective holes of the ears and the flange.
- the fan 3 is equipped with damping wedges 31 whose purpose is to reduce and absorb as much as possible the angular displacement of the blades 10 in their respective cells 18 and, by way of Consequently, it is possible to limit or even eliminate wear produced by friction by the contact of the rear faces 13 of the blade roots 12 with the front face 22 of the upstream connecting flange 23 of the drum, when the fan 3 is in autorotation (not driven by the drive shaft 9) for the reasons stated above.
- the damping wedges 31 are elastically deformable and arranged tangentially at the outer periphery 19 of the disk between the adjacent, adjacent blades 10, making contact therewith.
- the damping wedges 31 are located in cavities 32 each delimited by the outer surface or periphery 19 of the disk, the two feet 12 of the adjacent blades and the bottom 33 of the platform reported 14.
- the damping wedges are made of a polymeric material, such as an elastomer, for example a polyurethane, having a hardness of between 60 and 90 Shore, so as to have shims having a certain flexibility while being sufficiently rigid to maintain proper mechanical strength.
- each damping wedge 31 is located radially close to the outer surface 19 of the disk, to absorb the angular deflection of the blades closest to the connection of the beads 17 with the cells 18.
- the damping wedges 31 are disposed in the same radial plane of the disc and between all the radial vanes 10 of the disc (and therefore in number equal to the vanes) and are further dimensionally identical between them.
- the damping wedges 31, in the illustrated non-limiting embodiment are cylindrical and flattened, in particular with an oblong, stadium-shaped cross section. Any other form could be considered.
- the transverse width L of the wedge shown corresponding to the tangential width once mounted at the periphery of the disk, between its two rounded edges 34 is at least equal to or greater than the width separating the lateral faces facing the adjacent blades.
- the wedges are made of an elastically deformable material, it is certain that the tangential contact with the blades is effective to better absorb their angular displacement symbolized by arrows D in FIG. 3.
- the two rounded edges 34 of each spacer 31 are thus compressed and supported against the lateral faces facing the blade roots concerned, while the lower right portion 36 is turned towards the outer surface 19 of the disk, close to the latter, and the upper right portion 37 is turned towards the platform 14, remote from it.
- the damping shims 31 thus pressed are positioned tangentially between the blade roots.
- a support 40 receiving the shim and itself fixed at its corresponding ends to the disk 8.
- the support 40 is housed in the inter-blade cavity 32 and has an inverted U-shaped stirrup shape between the lateral wings 41 of which the wedge 31 engages by its radial faces 42 perpendicular to the rounded edge 34.
- the wings 41 of the stirrup which are also arranged radially by relative to the blower, in turn advantageously engage between the outer radial tabs 21 and 25 of the disc 8.
- the fasteners 20 and 24 respectively of the drum disk and the disk platforms are also used to fix the receiving media 40 wedges to the disk 8.
- the fasteners 20 and 24 respectively of the drum disk and the disk platforms are also used to fix the receiving media 40 wedges to the disk 8.
- it avoids any structural modification of the latter and other parts Surrounding members for installing the damping wedges 31 with their supports 40.
- These wedges are thus confined in the supports with their rounded edges 34 protruding tangentially from the stirrup supports 40, to come into contact with the faces 35 of the respective feet 12 of the adjacent blades. 10.
- the reception and retention media 40 wedges are metallic.
- counterbores 43 are formed in the radial faces 42 of shims 31 to receive corresponding nuts of fasteners 20, 24 and facilitate the mounting of shims and supports between the radial tabs of the disc.
- the two counterbores 43 thus limit the axial clearances between each shim and its support, which ensures a constant and reliable positioning of the shims during repeated loading.
- the downstream counterbore 43 according to the arrow F2 is further opening tangentially to assist in mounting the shim.
- the two countersinks 43 have different geometrical characteristics making it possible to avoid errors in the direction of assembly of shims 31.
- a metal plate 45 is arranged on the outer or upper face 37 of each shim. This plate is overmolded to the wedge so as to form a single set "wedge-plate".
- a metal-to-metal contact is obtained between the wafer and the support providing optimum mechanical strength and durability to the elastically deformable damping shims. It is therefore understood that, by their tangential contact with the blades 10, the elastically deformable damping shims 31 introduced tangentially between the blade roots make it possible to contain the angular displacement of these blades in their cells 18.
- damping wedges makes it possible, during the autorotation of the blower 3, to limit and eliminate the relative sliding between the rear faces 13 of the blade roots 12 and the front face 22 of the upstream flange 23 of the drum, and the phenomena of wear that ensue.
- said shims thus arranged also participate, during the operation of the turbojet engine, when the fan 3 is driven by the low pressure shaft 9, to the absorption of the vibration phenomena of the vanes 1 1 blades, in the manner of known depreciation.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1515665.6A GB2526475B (en) | 2013-03-15 | 2014-03-04 | Fan for a multi-flow turboshaft engine, and turboshaft engine equipped with such a fan |
US14/776,300 US20160032734A1 (en) | 2013-03-15 | 2014-03-04 | Fan for a multi-flow turboshaft engine, and turboshaft engine equipped with such a fan |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1352318 | 2013-03-15 | ||
FR1352318A FR3003294B1 (fr) | 2013-03-15 | 2013-03-15 | Soufflante de turbomoteur a flux multiple, et turbomoteur equipe d'une telle soufflante |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014140449A1 true WO2014140449A1 (fr) | 2014-09-18 |
Family
ID=48613887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2014/050472 WO2014140449A1 (fr) | 2013-03-15 | 2014-03-04 | Soufflante de turbomoteur a flux multiple, et turbomoteur equipe d'une telle soufflante |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160032734A1 (fr) |
FR (1) | FR3003294B1 (fr) |
GB (1) | GB2526475B (fr) |
WO (1) | WO2014140449A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105909557A (zh) * | 2016-06-21 | 2016-08-31 | 中国航空工业集团公司沈阳发动机设计研究所 | 一种风扇转子叶片安装结构 |
FR3039225A1 (fr) * | 2015-07-20 | 2017-01-27 | Snecma | Turbomachine, telle par exemple qu'un turboreacteur d'avion |
FR3052484A1 (fr) * | 2016-06-08 | 2017-12-15 | Snecma | Rotor resistant aux impacts |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10670037B2 (en) * | 2017-11-21 | 2020-06-02 | General Electric Company | Turbofan engine's fan blade and setting method thereof |
FR3075284B1 (fr) * | 2017-12-18 | 2020-09-04 | Safran Aircraft Engines | Dispositif amortisseur |
FR3085783B1 (fr) * | 2018-09-10 | 2021-04-23 | Safran Aircraft Engines | Panneau de traitement acoustique pour turboreacteur |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0081416A1 (fr) | 1981-12-03 | 1983-06-15 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation, "S.N.E.C.M.A." | Dispositif d'amortissement des aubes d'une soufflante de turbomachine |
EP0488874A1 (fr) * | 1990-11-28 | 1992-06-03 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" | Rotor de soufflante avec aubes sans plates-formes et sabots reconstituant le profil de veine |
EP0764766A1 (fr) * | 1995-09-21 | 1997-03-26 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" | Agencement amortisseur monté entre des aubes de rotor |
FR2923557A1 (fr) | 2007-11-12 | 2009-05-15 | Snecma Sa | Ensemble d'une aube de soufflante et de son amortisseur, amortisseur d'aube de soufflante et methode de calibrage de l'amortisseur |
FR2949142A1 (fr) * | 2009-08-11 | 2011-02-18 | Snecma | Cale amortisseuse de vibrations pour aube de soufflante |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4111603A (en) * | 1976-05-17 | 1978-09-05 | Westinghouse Electric Corp. | Ceramic rotor blade assembly for a gas turbine engine |
GB1549152A (en) * | 1977-01-11 | 1979-08-01 | Rolls Royce | Rotor stage for a gas trubine engine |
FR2665726B1 (fr) * | 1990-08-08 | 1993-07-02 | Snecma | Soufflante de turbomachine a amortisseur dynamique a cames. |
US5156528A (en) * | 1991-04-19 | 1992-10-20 | General Electric Company | Vibration damping of gas turbine engine buckets |
FR2716502B1 (fr) * | 1994-02-23 | 1996-04-05 | Snecma | Garniture d'étanchéité entre des aubes et des plates-formes intermédiaires. |
FR2888897B1 (fr) * | 2005-07-21 | 2007-10-19 | Snecma | Dispositif d'amortissement des vibrations d'un anneau de retention axiale des aubes de soufflante d'une turbomachine |
FR2903154B1 (fr) * | 2006-06-29 | 2011-10-28 | Snecma | Rotor de turbomachine et turbomachine comportant un tel rotor |
FR2948725B1 (fr) * | 2009-07-28 | 2012-10-05 | Snecma | Dispositif anti-usure d'un rotor de turbomachine |
US8066479B2 (en) * | 2010-04-05 | 2011-11-29 | Pratt & Whitney Rocketdyne, Inc. | Non-integral platform and damper for an airfoil |
US9366142B2 (en) * | 2011-10-28 | 2016-06-14 | General Electric Company | Thermal plug for turbine bucket shank cavity and related method |
-
2013
- 2013-03-15 FR FR1352318A patent/FR3003294B1/fr active Active
-
2014
- 2014-03-04 US US14/776,300 patent/US20160032734A1/en not_active Abandoned
- 2014-03-04 WO PCT/FR2014/050472 patent/WO2014140449A1/fr active Application Filing
- 2014-03-04 GB GB1515665.6A patent/GB2526475B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0081416A1 (fr) | 1981-12-03 | 1983-06-15 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation, "S.N.E.C.M.A." | Dispositif d'amortissement des aubes d'une soufflante de turbomachine |
EP0488874A1 (fr) * | 1990-11-28 | 1992-06-03 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" | Rotor de soufflante avec aubes sans plates-formes et sabots reconstituant le profil de veine |
EP0764766A1 (fr) * | 1995-09-21 | 1997-03-26 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" | Agencement amortisseur monté entre des aubes de rotor |
FR2923557A1 (fr) | 2007-11-12 | 2009-05-15 | Snecma Sa | Ensemble d'une aube de soufflante et de son amortisseur, amortisseur d'aube de soufflante et methode de calibrage de l'amortisseur |
FR2949142A1 (fr) * | 2009-08-11 | 2011-02-18 | Snecma | Cale amortisseuse de vibrations pour aube de soufflante |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3039225A1 (fr) * | 2015-07-20 | 2017-01-27 | Snecma | Turbomachine, telle par exemple qu'un turboreacteur d'avion |
FR3052484A1 (fr) * | 2016-06-08 | 2017-12-15 | Snecma | Rotor resistant aux impacts |
CN105909557A (zh) * | 2016-06-21 | 2016-08-31 | 中国航空工业集团公司沈阳发动机设计研究所 | 一种风扇转子叶片安装结构 |
Also Published As
Publication number | Publication date |
---|---|
FR3003294A1 (fr) | 2014-09-19 |
GB2526475B (en) | 2018-05-16 |
GB2526475A (en) | 2015-11-25 |
GB201515665D0 (en) | 2015-10-21 |
FR3003294B1 (fr) | 2018-03-30 |
US20160032734A1 (en) | 2016-02-04 |
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