EP1223309A1 - Doppelte Schaufelblatthalterung - Google Patents

Doppelte Schaufelblatthalterung Download PDF

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Publication number
EP1223309A1
EP1223309A1 EP02290048A EP02290048A EP1223309A1 EP 1223309 A1 EP1223309 A1 EP 1223309A1 EP 02290048 A EP02290048 A EP 02290048A EP 02290048 A EP02290048 A EP 02290048A EP 1223309 A1 EP1223309 A1 EP 1223309A1
Authority
EP
European Patent Office
Prior art keywords
disc
flange
radial
blade
fan 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.)
Granted
Application number
EP02290048A
Other languages
English (en)
French (fr)
Other versions
EP1223309B1 (de
Inventor
Charles Jean-Pierre Douguet
Maurice Guy Judet
Claude Robert Louis Lejars
Thierry Nitre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA Moteurs SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SNECMA Moteurs SA filed Critical SNECMA Moteurs SA
Publication of EP1223309A1 publication Critical patent/EP1223309A1/de
Application granted granted Critical
Publication of EP1223309B1 publication Critical patent/EP1223309B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/32—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
    • 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
    • F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates

Definitions

  • the present invention relates to a semi-collective blade retention system turbojet engines.
  • turbojet fan rotor comprising a plurality of removable fan blades fixed on a rim of a disc, said fan blades each comprising a blade root which is mounted in a substantially axial groove of corresponding shape, formed in the disc rim, each of the fan blades being held in the groove by a wedge placed below each blade root, and means for retaining axially the wedges and the feet of blades in the grooves, said means comprising in particular a flange bearing against the upstream face of the disc and fixed to said disc by fixing means.
  • the upstream side designates the side facing the front of the engine and the downstream side, that facing back.
  • a radially inner part designates an area close to the axis of rotation of the disc, and a portion radially outside, the one that is far from it.
  • the document FR A 2 681 374 describes a fixing of fan blades of turbojet engine using scalloped flanges arranged upstream and downstream at the periphery of the disc and provided with holes, intended for the fixing of two rings provided respectively on a front cover and a compressor drum, which cooperate with the ends of the blade roots to immobilize them axially and radially.
  • the fan blades have two spoilers on the downstream part of their feet which engage respectively on the internal and external radial faces of a first ring, and also present on the upstream part of their feet two spoilers which engage respectively on the inner and outer radial faces of a second ring.
  • This locking device complicates the machining of the fan blades which have two spoilers at their two ends, and makes it difficult and long to replace a blade damaged, because it is necessary to unscrew the plurality of fixing pins of a ring, these pins accommodating in the orifices of a scalloped flange and being of a difficult access.
  • the object of the invention is to propose a fan rotor as described in introduction in which the blades are retained in cascade in the event of displacement axial.
  • the wedges comprise at one of their ends a protrusion interposed between the blade roots and the flange, by the causes the disc to have a plurality of radial protrusions on its upstream face alternating with the grooves, by the fact that the flange has on its downstream face a plurality of radial teeth capable of bearing against the protuberances radial of the disc in the event of axial movement of a blade, and by the fact that the means for fixing the flange to the disc are arranged in the radially inner part flaccid.
  • the fan blades are stopped in cascade from the as follows: the fan blade first rests on the block, then at least one radial flange tooth cooperates in part with a protuberance of the disc for immobilize the fan blade.
  • the flange fixing means contribute to the definitive end of the fan dawn.
  • the radial protrusions of the disc extend towards outside, and the radial teeth of the flange extend inward.
  • said radial protrusions of the disc extend towards the inside and said radial teeth of the flange towards the outside.
  • an axial clearance is provided between the radial protrusions of the disc and radial teeth of the flange.
  • This game dissipates part of the energy when the fan dawn, retained by the wedge, moves axially.
  • the means for fixing the flange to the disc have a plurality of pins parallel to the axis of rotation of the disc.
  • pins are in sufficient number to retain the flange on the disc in case axial displacement of a fan blade.
  • they include a screw-nut assembly collecting the axial forces and the shear forces.
  • FIGS. 1 and 2 show a fan rotor disk 10 comprising a rim 12 which has at its periphery a plurality of substantially axial grooves 14 and regularly spaced around the axis of rotation of the disc 10.
  • each groove 14 is mounted by sliding axially a foot 16 of a fan blade 18. Between the blade root 16 and the bottom of the groove 14 is engaged a wedge 20 which keeps the blade root 16 in abutment against the walls of the groove 14 corresponding.
  • Each wedge 20 has a protuberance 22 at one of its ends.
  • this protuberance 22 is located at the upstream end of the wedge 20, between the upstream face of the blade root 16 and a flange 24 bearing against the upstream face of the disc 10.
  • the flange 24 is formed by an internal wall of a ferrule which delimits internally the air flow channel through the blower.
  • the disc 10 has on its upstream face and alternating with the grooves 14, a plurality of radial protrusions 26 directed outwards.
  • the flange 24 has on its downstream face a plurality of radial teeth 28 directed inwards, likely to come to bear against the radial protrusions 26 of the disc 10.
  • Figure 3 shows that to mount the flange 24 on the disc 10 (position unlocked), the radial teeth 28 of the flange 24 are passed through the notches 30 interposed between the radial protrusions 26 of the disc 10 and located above the bottom of grooves 14.
  • Figure 4 shows the flange 24 in the locked position.
  • the width of the teeth radial 28 of the flange 24 may be greater than that of the radial protrusions 26 of the disc 10, so that a fraction of each of the radial teeth 28 allows to wedge axially a part of each fan blade 18.
  • the flange 24 is held in position by a simple screw / nut assembly.
  • the means for fixing the flange 24 include locking means constituted by pins comprising screws 44 and nuts 46.
  • Figure 5 shows a flange 42 bolted with said screws 44 and said nuts 46 crimped in the disc 10.
  • the disc 10 which is unchanged in its radially outer part (protuberances radials 26) is thus of simpler shape in its radially inner part. It the same applies to the flange 24.
  • This bolted flange system 42 serves both to maintain the rotation of the flange 24 relative to the disc 10, and to its axial retention, which requires a number therefore pins.
  • Figure 6 shows that the disc 10 has partly radially inside a plurality of holes intended to hold the flange 24 on the disc 10. The attachment of the flange 24 to the disc 10 is done, for example, using a plurality of screws 44 and nuts 46, so as to keep the flange 24 tight on the disc 10 even if an attempt is made to lose a blade.
  • the screw-nut assembly 44, 46 locks the flange 24 on the disc 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP02290048A 2001-01-11 2002-01-10 Doppelte Schaufelblatthalterung Expired - Lifetime EP1223309B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0100294 2001-01-11
FR0100294A FR2819289B1 (fr) 2001-01-11 2001-01-11 Systeme de retention des aubes de type combine ou cascade

Publications (2)

Publication Number Publication Date
EP1223309A1 true EP1223309A1 (de) 2002-07-17
EP1223309B1 EP1223309B1 (de) 2005-06-08

Family

ID=8858676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02290048A Expired - Lifetime EP1223309B1 (de) 2001-01-11 2002-01-10 Doppelte Schaufelblatthalterung

Country Status (9)

Country Link
US (1) US20020090300A1 (de)
EP (1) EP1223309B1 (de)
JP (1) JP4031247B2 (de)
CA (1) CA2364128A1 (de)
DE (1) DE60204486T2 (de)
ES (1) ES2240665T3 (de)
FR (1) FR2819289B1 (de)
RU (1) RU2221169C2 (de)
UA (1) UA72255C2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1849962A1 (de) * 2006-04-27 2007-10-31 Snecma Haltungssystem von Schaufeln an einem Rotor
EP1995467A1 (de) * 2006-03-13 2008-11-26 IHI Corporation Haltestruktur einer ventilatorschaufel
FR2930595A1 (fr) * 2008-04-24 2009-10-30 Snecma Sa Rotor de soufflante d'une turbomachine ou d'un moteur d'essai
FR2996584A1 (fr) * 2012-10-10 2014-04-11 Snecma Cale pour pied de pale ajouree

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4807113B2 (ja) * 2006-03-14 2011-11-02 株式会社Ｉｈｉ ファンのダブテール構造
FR2913735B1 (fr) * 2007-03-16 2013-04-19 Snecma Disque de rotor d'une turbomachine
FR2929660B1 (fr) * 2008-04-07 2012-11-16 Snecma Dispositif anti-usure pour rotor de turbomachine, bouchon formant dispositif anti-usure et rotor de compresseur de moteur a turbine a gaz comportant un bouchon anti-usure
FR2931871B1 (fr) * 2008-05-29 2011-08-19 Snecma Rotor de soufflante pour une turbomachine.
FR2971822B1 (fr) * 2011-02-21 2015-04-24 Snecma Rotor de soufflante, en particulier pour une turbomachine
CN106224360A (zh) * 2016-07-25 2016-12-14 珠海格力节能环保制冷技术研究中心有限公司 风扇与电机轴安装结构
CN113083537B (zh) * 2021-05-08 2024-08-30 广州极飞科技股份有限公司 离心喷盘、雾化装置和无人设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096074A (en) * 1960-12-06 1963-07-02 Rolls Royce Bladed rotors of machines such as gas turbines
FR2561307A1 (fr) * 1984-03-14 1985-09-20 Snecma Dispositif de verrouillage d'aubes de soufflantes
GB2244100A (en) * 1990-05-16 1991-11-20 Rolls Royce Plc Retaining gas turbine rotor blades
US5173024A (en) * 1990-06-27 1992-12-22 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Fixing arrangement for mounting an annular member on a disk of a turboshaft engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2681374B1 (fr) 1991-09-18 1993-11-19 Snecma Fixation d'aube de souflante de turboreacteur.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096074A (en) * 1960-12-06 1963-07-02 Rolls Royce Bladed rotors of machines such as gas turbines
FR2561307A1 (fr) * 1984-03-14 1985-09-20 Snecma Dispositif de verrouillage d'aubes de soufflantes
GB2244100A (en) * 1990-05-16 1991-11-20 Rolls Royce Plc Retaining gas turbine rotor blades
US5173024A (en) * 1990-06-27 1992-12-22 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Fixing arrangement for mounting an annular member on a disk of a turboshaft engine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1995467A1 (de) * 2006-03-13 2008-11-26 IHI Corporation Haltestruktur einer ventilatorschaufel
EP1995467A4 (de) * 2006-03-13 2013-01-02 Ihi Corp Haltestruktur einer ventilatorschaufel
EP1849962A1 (de) * 2006-04-27 2007-10-31 Snecma Haltungssystem von Schaufeln an einem Rotor
FR2900437A1 (fr) * 2006-04-27 2007-11-02 Snecma Sa Systeme de retention des aubes dans un rotor
US7824157B2 (en) 2006-04-27 2010-11-02 Snecma System for retaining blades in a rotor
FR2930595A1 (fr) * 2008-04-24 2009-10-30 Snecma Sa Rotor de soufflante d'une turbomachine ou d'un moteur d'essai
US8092183B2 (en) 2008-04-24 2012-01-10 Snecma Fan rotor for a turbomachine or a test engine
RU2487250C2 (ru) * 2008-04-24 2013-07-10 Снекма Ротор вентилятора газотурбинного двигателя или опытного двигателя
FR2996584A1 (fr) * 2012-10-10 2014-04-11 Snecma Cale pour pied de pale ajouree
US9453414B2 (en) 2012-10-10 2016-09-27 Snecma Cleat for open-work blade foot

Also Published As

Publication number Publication date
DE60204486D1 (de) 2005-07-14
UA72255C2 (uk) 2005-02-15
JP2002242888A (ja) 2002-08-28
FR2819289A1 (fr) 2002-07-12
ES2240665T3 (es) 2005-10-16
EP1223309B1 (de) 2005-06-08
FR2819289B1 (fr) 2003-07-11
CA2364128A1 (fr) 2002-07-11
DE60204486T2 (de) 2006-05-11
RU2221169C2 (ru) 2004-01-10
US20020090300A1 (en) 2002-07-11
JP4031247B2 (ja) 2008-01-09

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