WO2012150425A1 - Rotor de turbomachine avec moyen de retenue axiale des aubes - Google Patents
Rotor de turbomachine avec moyen de retenue axiale des aubes Download PDFInfo
- Publication number
- WO2012150425A1 WO2012150425A1 PCT/FR2012/051004 FR2012051004W WO2012150425A1 WO 2012150425 A1 WO2012150425 A1 WO 2012150425A1 FR 2012051004 W FR2012051004 W FR 2012051004W WO 2012150425 A1 WO2012150425 A1 WO 2012150425A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- axial
- blade
- rotor according
- rotor
- blades
- Prior art date
Links
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
- F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
- F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
- F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
-
- 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
- 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
- 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
- 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
Definitions
- the present invention relates to the field of turbomachines, more particularly that of multi-stream turbofan engines with a front blower and aims at the axial locking of the blades housed in grooves or axial cavities on the rim of a rotor disc. It essentially aims to lock the blades of the fan in their housing on the fan disk.
- a multitrack turbojet engine comprises a gas turbine engine driving a fan generally at the front of the engine.
- a blower conventionally comprises a rotor disk provided with a plurality of radial fan blades spaced from each other circumferentially and fixed in individual cells formed on its rim.
- the cells are oriented substantially axially and are section dovetail. Their shape is complementary to that of the blade roots to ensure their retention in place when the blades are subjected to centrifugal forces during the rotation of the disc.
- the vanes are mounted individually by being introduced axially into the cells. They are wedged radially by means of an axial wedge that is slid between the bottom of the cell and the foot of the blade.
- the lock is formed of a U-shaped piece placed in a radial plane perpendicular to the axial shim and is itself retained in radial notches arranged at a time in the foot of the dawn and in the flanks of the cell.
- the axial retention device for the blades is formed of an axial wedge disposed under the foot of the blade in the bottom of the cell and a latch perpendicular to the axial spacer against which the foot of the dawn comes into axial abutment upstream.
- the latch is disposed in radial notches in the flanks of the disc teeth - the portion of the rim of the disc between two adjacent cells is designated tooth.
- the latch and the wedge are secured to one another by a screw which passes radially through a first tab extending the axial wedge upstream and a second tab secured to the latch, at right angles thereto.
- a spacer is interposed between the bolt and the root of the blade to damp the axial forces resulting from an impact on the blades of the fan produced by the ingestion of an object for example.
- the spacer is made of a deformable material, such as a honeycomb, to absorb the energy of the shock.
- the blades comprise a blade and a foot for mounting on the disk but no integrated platform.
- Inter-blade platforms are reported between the blades to ensure continuity of the radially inner surface of the air stream passing through the rotor.
- These inter blade platforms when they are metallic, are fixed on the teeth of the rim of the disc by axial pins passing through two axial eyelets integral one tooth, the other of the platform inter blades.
- the fan blades large rope and composite material fitted to some engines, are immobilized by axial shims, arranged under their foot in the form of a bulb, which are also composite material.
- the axial shims are immobilized by a screw connection with the axial retention lock upstream of the blade. This connection occupies a large space between the upstream edge of the teeth of the disc, as seen in FIG.
- the size of the screw connection between the wedge and the lock thus requires a bypass of the area by the rear shell of the upstream cover of the rotor.
- the upstream cowl is the fairing piece that forms the upstream outer surface of the fan rotor.
- the cantilever of the wedge relative to the upstream face of the lock does not pose any particular problem and is acceptable because it finds a place in the downstream volume formed by the hood rear ferrule.
- inter blade platforms are composite box
- the rear part of such a cover has no mechanical strength and can not provide this maintenance function.
- Such a ferrule must then be festooned and be sufficiently cleared not to interfere and leave the passage to the axial wedges.
- the axial shim being of composite material such as fan blades; it is then necessary to stick a light alloy metal head to ensure the connection by screw with the lock. The hold is then more difficult to manufacture.
- the object of the invention is to provide a fan rotor that does not have the disadvantages of the above solution.
- the turbojet fan rotor comprises a disk with a rim and substantially axial and dovetailed section on the rim, and vanes individually mounted in the cells, an axial shim being arranged between the blade root and the bottom of the cells and a transverse latch ensuring the upstream axial locking of the blades in their cell, the transverse latch being guided in radial notches formed in the sides of the cell and bearing radial support on the wedge, is characterized by the fact that the axial wedge is immobilized upstream while being in abutment against a transverse annular piece integral with the disc.
- the solution of the invention therefore consists in eliminating the nut-type connection between the axial shim and the lock.
- the placement of the axial wedges can be done using a mallet and the extraction using a tool to inertia.
- the axial wedge ensures the positioning of the blade as in the previous solution.
- the axial wedge ensures the radial positioning of the lock at the engine stop.
- the solution is compatible with the presence of an upstream titanium ferrule ensuring their maintenance.
- the axial wedge comprises a radial tab forming axial abutment against said upstream ferrule; more particularly, the lock comprises an axial tab forming an axial stop for the axial wedge.
- the lock comprises a spacer of material capable of being deformed by compression between the latch and the root of the blade.
- the rotor comprising inter blade platforms held in place by means of a retaining shell of the inter-blade platforms, said annular piece for immobilizing the axial shims forms an upstream protective cone of the rotor.
- the support ring of the platforms comprises a radial flange for attachment to the disk of the rotor, the flange being scalloped to provide openings through which the axial shims abut axially against the transverse annular piece.
- the axial shims comprise an axial lug with a radial orifice by means of which the axial shims can be extracted from their cell.
- the invention also relates to the turbofan engine comprising a fan rotor thus defined.
- Figure 2 shows in perspective the connection between the axial shim and the blade retaining latch of a fan rotor according to the prior art.
- FIG. 3 shows in axial section through a cell the connection between the latch and the axial shim of FIG. 2.
- Figure 4 shows in axial section through a cell the connection of an axial shim and a lock, according to a first embodiment of the invention
- FIG. 5 shows the connection of FIG. 4 in isometric perspective, viewed from three quarters upstream, without the retaining ferrule of the inter-blade platforms, themselves not shown.
- Figure 6 shows in perspective a side view of a connection according to a second embodiment of the invention.
- FIG. 7 shows, in perspective seen from three quarters front, the rotor according to the second embodiment. Detailed description of the invention
- the turbojet engine 1 of FIG. 1 is a double-stream engine with a front fan 2 comprising a fan disk 4 on which fan blades 6 are disposed, held by their feet in cavities formed on the rim.
- the disk is cantilevered on the low pressure shaft which also supports the drum 7 of the booster or low pressure compressor immediately downstream of the disk and to which it is attached.
- a piece 5 of generally conical shape is attached upstream on the fan disk; this piece has an essentially aerodynamic function of guiding the air flow towards the engine inlet.
- FIGS 2 and 3 show the mounting of a blade 6 of a fan in a cavity 41 of the disk of the fan, according to the prior art.
- An axial shim 43 is slid under the root of the blade so as to ensure the radial retention of the blade in its cell and a latch 44 perpendicular to the shim 43 is slid into notches in the sides of the cell of the upstream side of the disc.
- the axial shim comprises a portion 43a which is housed in the cell and an upstream end tab 43b which projects beyond the disk 4 and serves for connection with the lock 44.
- the connection is provided by a screw 45 which passes through the both the tab 43b and a tab 44a secured to the lock.
- this connection mode has a certain size and interferes with the mounting of the cover 5.
- the cover 5 comprises a rib 51 with a radial flange through which it is fixed to the disk 4.
- the outer rear edge 52 axially blocks the inter blade platforms 8 on the disk which are held radially elsewhere.
- Figures 4 and 5 illustrate a first embodiment. Disk 4 and the blades are not modified.
- An axial shim 143 is slid under the foot of the blade 6 in the space available between the root of the blade and the bottom of the cell. The comprises an axial portion 143a under the blade and a tab 143b which extends upstream, a radial tab 143b terminates the tab upstream and axial stop shape.
- a transverse latch 144 here perpendicular to the axial wedge, is slid into notches formed in the sides of the cell.
- a tab 144a at right angles to the latch extends upstream to abut against the radial tab 143c of the axial spacer 143.
- a spacer 144b, honeycomb, is interposed between the latch 144 t the foot of the dawn, according to a known solution as such of the prior art.
- the inter blade blades 8 ' are held in place, in retention with respect to the centrifugal forces, by a collar 145 which comprises an annular portion 145b which is supported on a corresponding locking lug 8' a, provided on the platforms inter blade 8 '.
- the outer surface of the annular portion 145b of the shell 145 forms a continuous aerodynamic surface with that of the inter blade blades 8 '.
- a radial flange 145a is pierced with orifices, not shown, through which the shell is bolted to the front face of the teeth 42. This radial flange also forms an axial stop for the tabs 143c.
- the cone 5 Upstream of the shell 145, the cone 5 'bears against the upstream face thereof; it is fixed to the disc 4 by any appropriate means.
- the assembly of the assembly comprises the installation of the vanes, their locking by the locks that slide in the radial notches, the introduction of axial shims 143 under the vanes, possibly with the aid of a mallet. because of the tight fit that is required.
- the tongue 143b abuts against the tab 144a.
- the latch 144 comprises bearing surfaces cooperating with the notches for a radial wedging when it rests on the shim 143.
- the establishment of the annular shroud 145 locks the assembly, bearing against the upstream face of the tongue 143b .
- Figures 6 and 7 show an alternative embodiment of the invention.
- the axial wedge 243 comprises an axial portion 243a, which is placed between the root of the blade and the bottom of the cell, and an upstream leg 243b which is here right without radial return.
- a latch 244 retains the blade axially as the previous latch 144;
- an annular ferrule 245 for centrifugal retention of inter-blade platforms comprises an annular support portion on upstream legs formed on the inter-blade platforms.
- a radial flange 245a is bolted to the teeth of the rim of the disc 4 and ensures the maintenance of the ferrule on the disc. This ferrule is distinguished from the preceding ferrule by the fact that it does not fulfill the function of axial wedging of the wedges 243.
- One or other of the two embodiments allows the realization of axial shims made of a composite material.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2834759A CA2834759C (fr) | 2011-05-04 | 2012-05-04 | Rotor de turbomachine avec moyen de retenue axiale des aubes |
BR112013028170-7A BR112013028170B1 (pt) | 2011-05-04 | 2012-05-04 | Rotor de turbomáquina tal como uma ventoinha de turborreator, e, turborreator de ventoinha dianteira |
US14/115,513 US9441494B2 (en) | 2011-05-04 | 2012-05-04 | Turbomachine rotor with a means for axial retention of the blades |
CN201280021662.6A CN103502653B (zh) | 2011-05-04 | 2012-05-04 | 具有叶片的轴向保持装置的涡轮机转子 |
JP2014508866A JP6027606B2 (ja) | 2011-05-04 | 2012-05-04 | ブレードの軸方向保持手段を備えたターボ機械ロータ |
EP12725108.0A EP2705256B1 (fr) | 2011-05-04 | 2012-05-04 | Rotor de turbomachine avec moyen de retenue axiale des aubes |
RU2013150342A RU2607986C2 (ru) | 2011-05-04 | 2012-05-04 | Ротор турбомашины и турбореактивный двигатель |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1153839 | 2011-05-04 | ||
FR1153839A FR2974864B1 (fr) | 2011-05-04 | 2011-05-04 | Rotor de turbomachine avec moyen de retenue axiale des aubes |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012150425A1 true WO2012150425A1 (fr) | 2012-11-08 |
Family
ID=46201730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2012/051004 WO2012150425A1 (fr) | 2011-05-04 | 2012-05-04 | Rotor de turbomachine avec moyen de retenue axiale des aubes |
Country Status (9)
Country | Link |
---|---|
US (1) | US9441494B2 (fr) |
EP (1) | EP2705256B1 (fr) |
JP (1) | JP6027606B2 (fr) |
CN (1) | CN103502653B (fr) |
BR (1) | BR112013028170B1 (fr) |
CA (1) | CA2834759C (fr) |
FR (1) | FR2974864B1 (fr) |
RU (1) | RU2607986C2 (fr) |
WO (1) | WO2012150425A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015155446A1 (fr) * | 2014-04-07 | 2015-10-15 | Snecma | Verrou de rotor de turbomachine |
FR3116573A1 (fr) | 2020-11-20 | 2022-05-27 | Safran Aircraft Engines | Aube comprenant un bouclier ayant une conduite de passage d’air de dégivrage |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3004227B1 (fr) * | 2013-04-09 | 2016-10-21 | Snecma | Disque de soufflante pour un turboreacteur |
FR3010442B1 (fr) * | 2013-09-09 | 2015-10-09 | Snecma | Disque aubage monobloc a contraintes reduites en pied d'aube, de preference pour soufflante de turbomachine d'aeronef |
US10371163B2 (en) | 2016-02-02 | 2019-08-06 | General Electric Company | Load absorption systems and methods |
FR3048997B1 (fr) * | 2016-03-21 | 2020-03-27 | Safran Aircraft Engines | Plateforme d'aube et disque de soufflante de turbomachine aeronautique |
FR3057908B1 (fr) * | 2016-10-21 | 2019-11-22 | Safran Aircraft Engines | Ensemble rotatif d'une turbomachine muni d'un systeme de maintien axial d'une aube |
FR3102796B1 (fr) | 2019-10-30 | 2021-10-08 | Safran Aircraft Engines | Plateformes inter-aubes |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2345605A1 (fr) * | 1976-03-25 | 1977-10-21 | Snecma | Dispositif de retenue pour aubes de soufflantes |
FR2492906A2 (fr) * | 1976-03-25 | 1982-04-30 | Snecma | Dispositif de retenue pour aubes de soufflantes |
FR2690947A1 (fr) * | 1992-05-08 | 1993-11-12 | Gen Electric | Agencement de disque à ailettes avec dispositif de retenue axiale des ailettes. |
FR2814495A1 (fr) * | 2000-09-28 | 2002-03-29 | Snecma Moteurs | Systeme de retention amont pour aubes et plates-formes de soufflante |
US6457942B1 (en) * | 2000-11-27 | 2002-10-01 | General Electric Company | Fan blade retainer |
EP1748154A2 (fr) * | 2005-07-29 | 2007-01-31 | Snecma | Verrouillage des aubes dans un rotor de soufflante |
EP1970537A1 (fr) * | 2007-03-16 | 2008-09-17 | Snecma | Soufflante de turbomachine |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2535794A1 (fr) * | 1982-11-08 | 1984-05-11 | Snecma | Dispositif de retenue axiale et radiale d'aubes de soufflante |
FR2639402B1 (fr) * | 1988-11-23 | 1990-12-28 | Snecma | Disque ailete de rotor de turbomachine |
US5282720A (en) * | 1992-09-15 | 1994-02-01 | General Electric Company | Fan blade retainer |
FR2803623B1 (fr) * | 2000-01-06 | 2002-03-01 | Snecma Moteurs | Agencement de retenue axiale d'aubes dans un disque |
US6481971B1 (en) * | 2000-11-27 | 2002-11-19 | General Electric Company | Blade spacer |
FR2841609B1 (fr) * | 2002-06-27 | 2004-09-10 | Snecma Moteurs | Cale de retenue du pied des aubes de soufflante |
FR2844562B1 (fr) * | 2002-09-18 | 2004-10-29 | Snecma Moteurs | Maitrise de la position axiale d'une aube de rotor de soufflante |
FR2931871B1 (fr) * | 2008-05-29 | 2011-08-19 | Snecma | Rotor de soufflante pour une turbomachine. |
RU87212U1 (ru) * | 2009-04-07 | 2009-09-27 | Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации | Рабочее колесо вентилятора или компрессора |
CA2864065A1 (fr) * | 2012-02-13 | 2013-08-22 | Cosmo Technologies Limited | Procede de traitement de maladies intestinales presentant au moins une composante inflammatoire |
-
2011
- 2011-05-04 FR FR1153839A patent/FR2974864B1/fr active Active
-
2012
- 2012-05-04 US US14/115,513 patent/US9441494B2/en active Active
- 2012-05-04 RU RU2013150342A patent/RU2607986C2/ru active
- 2012-05-04 JP JP2014508866A patent/JP6027606B2/ja active Active
- 2012-05-04 CN CN201280021662.6A patent/CN103502653B/zh active Active
- 2012-05-04 EP EP12725108.0A patent/EP2705256B1/fr active Active
- 2012-05-04 CA CA2834759A patent/CA2834759C/fr active Active
- 2012-05-04 BR BR112013028170-7A patent/BR112013028170B1/pt active IP Right Grant
- 2012-05-04 WO PCT/FR2012/051004 patent/WO2012150425A1/fr active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2345605A1 (fr) * | 1976-03-25 | 1977-10-21 | Snecma | Dispositif de retenue pour aubes de soufflantes |
FR2492906A2 (fr) * | 1976-03-25 | 1982-04-30 | Snecma | Dispositif de retenue pour aubes de soufflantes |
FR2690947A1 (fr) * | 1992-05-08 | 1993-11-12 | Gen Electric | Agencement de disque à ailettes avec dispositif de retenue axiale des ailettes. |
FR2814495A1 (fr) * | 2000-09-28 | 2002-03-29 | Snecma Moteurs | Systeme de retention amont pour aubes et plates-formes de soufflante |
US6457942B1 (en) * | 2000-11-27 | 2002-10-01 | General Electric Company | Fan blade retainer |
EP1748154A2 (fr) * | 2005-07-29 | 2007-01-31 | Snecma | Verrouillage des aubes dans un rotor de soufflante |
EP1970537A1 (fr) * | 2007-03-16 | 2008-09-17 | Snecma | Soufflante de turbomachine |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015155446A1 (fr) * | 2014-04-07 | 2015-10-15 | Snecma | Verrou de rotor de turbomachine |
US11220920B2 (en) | 2014-04-07 | 2022-01-11 | Safran Aircraft Engines | Turbine engine rotor lock |
FR3116573A1 (fr) | 2020-11-20 | 2022-05-27 | Safran Aircraft Engines | Aube comprenant un bouclier ayant une conduite de passage d’air de dégivrage |
WO2022106772A1 (fr) | 2020-11-20 | 2022-05-27 | Safran Aircraft Engines | Aube comprenant un bouclier ayant une conduite de passage d'air de dégivrage |
Also Published As
Publication number | Publication date |
---|---|
EP2705256A1 (fr) | 2014-03-12 |
CA2834759C (fr) | 2019-01-08 |
US20140072437A1 (en) | 2014-03-13 |
RU2607986C2 (ru) | 2017-01-11 |
JP6027606B2 (ja) | 2016-11-16 |
CN103502653B (zh) | 2016-10-26 |
US9441494B2 (en) | 2016-09-13 |
CN103502653A (zh) | 2014-01-08 |
RU2013150342A (ru) | 2015-06-10 |
FR2974864B1 (fr) | 2016-05-27 |
FR2974864A1 (fr) | 2012-11-09 |
EP2705256B1 (fr) | 2017-02-08 |
BR112013028170A2 (pt) | 2017-01-10 |
CA2834759A1 (fr) | 2012-11-08 |
JP2014513765A (ja) | 2014-06-05 |
BR112013028170B1 (pt) | 2021-03-23 |
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