EP0110744B1 - Radial- und Axialbefestigung einer Verdichterschaufel - Google Patents

Radial- und Axialbefestigung einer Verdichterschaufel Download PDF

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Publication number
EP0110744B1
EP0110744B1 EP83402057A EP83402057A EP0110744B1 EP 0110744 B1 EP0110744 B1 EP 0110744B1 EP 83402057 A EP83402057 A EP 83402057A EP 83402057 A EP83402057 A EP 83402057A EP 0110744 B1 EP0110744 B1 EP 0110744B1
Authority
EP
European Patent Office
Prior art keywords
wedge
blade
root
engaged
disc
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.)
Expired
Application number
EP83402057A
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English (en)
French (fr)
Other versions
EP0110744A1 (de
Inventor
Jean Marc Surdi
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
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of EP0110744A1 publication Critical patent/EP0110744A1/de
Application granted granted Critical
Publication of EP0110744B1 publication Critical patent/EP0110744B1/de
Expired 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

Definitions

  • the present invention relates to a fan wheel of a turbomachine fan in which a device ensures the axial and radial retention of the blades.
  • Axial and radial blade retaining devices are known, such as that described in French patent 2,345,605, which consists of a shim which is placed between the foot of the blade and the bottom of a groove or recess provided in the rim of the rotor disc so as to press the part of the blade root dovetail radially furthest from the axis against the lateral teeth of the groove, the wedge being held in the axial direction by a U-shaped lock which cooperates with corresponding notches provided in the root of the blade and in the teeth of the groove.
  • the centrifugal force exerted on the blades is no longer sufficient to keep the blade roots pressed at the same time on the two oblique faces of the grooves.
  • the blades pass from a support position on one side of the cell to a support position on the other side. This produces a rattling and, what is more serious, a mat which very seriously damages the surfaces in contact. If such damage is already difficult to accept for easily replaceable parts, such as shims or, if need be, the blades, it is not the same for the rotor disc for which such damage is absolutely unacceptable.
  • French patent 2,029,000 relates to a device for radially fixing a fan blade comprising a shim made of molded elastomer material interposed between the foot of the blade and the bottom of the groove or cell.
  • This elastomer spacer plays a role of damping and reduction of the friction zones between the foot of the blade and the cell; however, this device does not include a metallic element under stress exerting a significant force against the blade root.
  • French patent 2,376,958 is also known, which relates to a vibration damping device consisting of an element made of elastomer material in which an elastically deformable metal part is embedded.
  • the thin steel sheet molded in the elastomer does not really exert a force in the radial direction on the blades, but acts only to keep the damper in contact with the plates.
  • the subject of the present invention is a turbine engine fan impeller incorporating a device making it possible to exert a significant force in the radial direction on the blade root and to improve the resistance of the coatings applied to the bulb of the blade root. or on the sides of the disc alveoli.
  • an axial and radial fan blade retention device in which the blade comprises a dovetail foot capable of being engaged by axial sliding in corresponding cells of the rim of the rotor disc, the rim of the disc comprising, at its periphery, teeth projecting axially upstream, provided with radial grooves arranged opposite one another and in which is housed an axial locking means of the foot of the blade, the device comprising an elastic shim interposed between the foot of the blade and the bottom of the groove for exerting on the foot of the blade a force directed radially outwards and a holding wedge in preload the wedge, interposed between the wedge and the lower front face of the foot of the blade, characterized in that it comprises a sheath of elastomer material in the form of a gutter extending axially and interposed between the wedge, the sides and the bottom of the socket, l edit sheath having an opening in which is engaged a stop of the shim constituting a central bearing of the blade
  • the sheath ensures the centering of the shim in the cell and it also performs the function of axial stop. Furthermore, this elastomer sheath is interposed between the sides of the cell and the wedge and it reduces the surface of the areas in contact.
  • the shims can be cut from a stretched or machined profile, so that this results in simplified and less costly manufacture.
  • FIGS 1 and 2 there is shown a disc 1 of a fan rotor having a rim in which are formed axially oriented cells or grooves 2 having in section the shape of a dovetail.
  • each of the cells 2 is engaged by axial sliding of a foot 3 of a blade 4 which comprises a blade 5, a platform 6 and a stilt 7 connecting the blade to the foot 3.
  • the foot 3 has a shaped section dovetail corresponding to that of groove 2.
  • the rim of the disc 1 has at its periphery teeth 8, 8a projecting axially forwardly provided with radial grooves 9, 9a arranged opposite one another and in which is housed a member 10 for axial locking of the foot 3 of dawn.
  • the locking member 10 consists of a rectangular parallelepiped whose rounded side edges 11, 11a are engaged in the grooves radial 9, 9a and which has on its outer edge a tongue 12 abutting under the upstream edge of the platform 6 of the blade ( Figure 2).
  • a stop 14 located in its central part is engaged in an opening or cut 15 of a sheath 16 of elastomer material in the form of gutter extending axially and interposed between the wedge 13, the sides and the bottom of the cell 2.
  • the central stop 14 which bears against the bottom of the cell 2 constitutes a central bearing of the wedge 13 on the bottom of the cell and ensures by its engagement in the opening 15 of the sleeve the axial maintenance of the wedge.
  • the wedge 13 further comprises a safety stop 20, also engaged in an opening 21 of the sheath.
  • the elastic wedge 13 has at the front a spout 17 comprising a hole 18 to facilitate its extraction by means of a tool; at the rear, the wedge has a stop 19 which bears against the foot 3 of the blade.
  • the sheath 16 engaged in the cell 2 has at the front a spoiler 22 bearing against the front face of the disc 1.
  • a wedge 23 which maintains the preload of the wedge 13, said wedge being held by a front cover 24 fixed by means of screws 25 to the disc 1.
  • the foot 3 of the blade is slid into the cell 2 until its upstream face is flush with the upstream face of the disc 1.
  • the blade 4 is locked axially by means of the locking member 10 which is introduced from the inside to the outside into the grooves 9, 9a of the disc.
  • the locking member 10 abuts by its tongue 12 against the internal face of the platform 6, and it is held in this position by means of a clamp.
  • the wedge 13 is inserted into the sheath 16, the stop 14 being engaged in the opening 15 of the sheath.
  • the assembly thus constituted by the wedge 13 and the sheath 16 is engaged in the cavity 2 of the disc, under the foot 3 of the blade, until the spoiler 22 abuts against the front face of the disc 1 You can then remove the clamp holding the locking member.
  • the elastic wedge 13 is curved towards the axis of the machine. After the introduction of the wedge 23 between the wedge and the foot of the blade, the wedge is released, so that, by reaction, the elastic wedge 13 presses the foot 3 of the blade against the flanks of the disc.
  • the corner 23 is then locked in place by means of the front cover 24 fixed to the disc.

Landscapes

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

Claims (5)

1. Verdichterschaufelrad einer Turbomaschine mit einer Vorrichtung zur axialen und radialen Halterung der Schaufeln, wobei jede Schaufel einen schwalbenschwanzförmigen Schaufelfuß besitzt, der durch axiales Einschieben mit korrespondieren Nuten in Eingriff bringbar sind, die in der Felge der Rotorscheibe angebracht sind,' wobei die Felge der Rotorscheibe längs ihrer Peripherie stromaufwärts weisende axial vorstehende Zähne aufweist, die mit einander zugewandten radialen Kehlen versehen sind, in denen sich ein Organ zur axialen Blockierung des Schaufelfußes befindet, und wobei die genannte Vorrichtung einen zwischen dem Schaufelfuß und dem Boden der Nut angeordneten elastischen Keil, der auf den Schaufelfuß eine radial nach außen gerichtete Kraft ausübt, sowie einen gegen diesen elastischen Keil vorgespannten Haltekeil umfaßt, der zwischen dem Keil und der vorderen Unterseite des Schaufelfußes angeordnet ist, dadurch gekennzeichnet, daß ein in axialer Richtung verlaufendes rinnenförmiges Hülsenteil (16) aus elastomeren Material vorgesehen ist, das zwischen dem genannten Keil (13), den Flanken und dem Boden der Nut (12) angeordnet ist und das eine Öffnung (15) besitzt, in die ein Anschlagteil (14) des Keils (13) eingreift, das ein zentrales Stützelement zur Abstützung des Keils auf dem Boden der Nut (2) bildet, und daß das Hülsenteil (16) aus elastomerem Material an seiner Vorderseite ein Mundstück (22) trägt, mit dem es an der stromaufwärts gelegenen Seite der Rotorscheibe (1) anliegt.
2. Verdichterschaufelrad nach Anspruch 1, dadurch gekennzeichnet, daß an dem Keil (13) ein vorderes Anschlagteil (20) vorgesehen ist, das in eine Öffnung (21) des Hülsenteils eingreift, um sich gegen den Boden der Nut (2) abzustützen.
3. Verdichterschaufelrad nach Anspruch 1, dadurch gekennzeichnet, daß das Blokkierungsorgan (10) aus einem rechteckigen Quader besteht, dessen Seitenränder (11, 11 a) in die radialen Kehlen (9, 9a) der genannten Zähne (8, 8a) eingreifen, und daß das Blockierorgan an seinem Außenrand eine Zunge (12) trägt, die unter dem stromaufwärts liegenden Rand der der Schaufelplattform (6) zur Anlage kommt und durch den genannten Haltekeil (23) gegen deren Innenrand gehalten wird.
4. Verdichterschaufelrad nach Anspruch 1, dadurch gekennzeichnet, daß der elastische Keil (13) an seiner Vorderseite eine Nase (17) aufweist, in der sich ein Loch (18) befindet, in das ein Ausziehwerkzeug zum Herausziehen des Keils einsetzbar ist.
5. Verdichterschaufelrad nach Anspruch 1, dadurch gekennzeichnet, daß der Keil (13) einen hinteren Anschlag (19) besitzt, der sich gegen den Schaufelfuß abstützt.
EP83402057A 1982-11-08 1983-10-24 Radial- und Axialbefestigung einer Verdichterschaufel Expired EP0110744B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8218653 1982-11-08
FR8218653A FR2535794A1 (fr) 1982-11-08 1982-11-08 Dispositif de retenue axiale et radiale d'aubes de soufflante

Publications (2)

Publication Number Publication Date
EP0110744A1 EP0110744A1 (de) 1984-06-13
EP0110744B1 true EP0110744B1 (de) 1986-10-01

Family

ID=9278974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83402057A Expired EP0110744B1 (de) 1982-11-08 1983-10-24 Radial- und Axialbefestigung einer Verdichterschaufel

Country Status (5)

Country Link
US (1) US4478554A (de)
EP (1) EP0110744B1 (de)
JP (1) JPS59101599A (de)
DE (1) DE3366620D1 (de)
FR (1) FR2535794A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8894370B2 (en) 2008-04-04 2014-11-25 General Electric Company Turbine blade retention system and method

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FR2566061B1 (fr) * 1984-06-14 1988-09-02 Snecma Dispositif de verrouillage axial d'une aube de turbomachine
FR2585069B1 (fr) * 1985-07-16 1989-06-09 Snecma Dispositif de limitation du debattement angulaire d'aubes montees sur un disque de rotor de turbomachine
US5205714A (en) * 1990-07-30 1993-04-27 General Electric Company Aircraft fan blade damping apparatus
JPH04161698A (ja) * 1990-10-26 1992-06-05 K F C:Kk トンネルのコンクリート覆工施工法
GB2262139A (en) * 1991-12-04 1993-06-09 Rolls Royce Plc Fan blade retainer
US5282720A (en) * 1992-09-15 1994-02-01 General Electric Company Fan blade retainer
GB9223593D0 (en) * 1992-11-11 1992-12-23 Rolls Royce Plc Gas turbine engine fan blade assembly
US5350279A (en) * 1993-07-02 1994-09-27 General Electric Company Gas turbine engine blade retainer sub-assembly
FR2715975B1 (fr) * 1994-02-10 1996-03-29 Snecma Rotor de turbomachine à rainures d'aube débouchantes axiales ou inclinées.
DE4430636C2 (de) * 1994-08-29 1997-01-23 Mtu Muenchen Gmbh Einrichtung zur Laufschaufelfixierung und zur Beseitigung von Rotorunwuchten bei axial durchströmten Verdichtern oder Turbinen von Gasturbinentriebwerken
FR2728299B1 (fr) * 1994-12-14 1997-01-24 Snecma Dispositif de fixation axiale d'aubes de rotor de turboreacteur
FR2746456B1 (fr) * 1996-03-21 1998-04-30 Snecma Dispositif de retenue du pied des aubes d'une soufflante
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FR2803623B1 (fr) * 2000-01-06 2002-03-01 Snecma Moteurs Agencement de retenue axiale d'aubes dans un disque
US6520742B1 (en) * 2000-11-27 2003-02-18 General Electric Company Circular arc multi-bore fan disk
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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
FR2889264B1 (fr) * 2005-07-29 2007-11-02 Snecma Verrouillage des aubes dans un rotor de soufflante
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US8485785B2 (en) 2007-07-19 2013-07-16 Siemens Energy, Inc. Wear prevention spring for turbine blade
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FR2930595B1 (fr) * 2008-04-24 2011-10-14 Snecma Rotor de soufflante d'une turbomachine ou d'un moteur d'essai
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FR2974864B1 (fr) * 2011-05-04 2016-05-27 Snecma Rotor de turbomachine avec moyen de retenue axiale des aubes
DE102013205948B4 (de) * 2013-04-04 2015-03-12 MTU Aero Engines AG Sicherungssystem und Verfahren zur Sicherung eines Befestigungsbereichs wenigstens einer Rotorschaufel oder eines Rotorschaufelsegments in einem Montagebereich eines Rotorgrundkörpers
GB201318623D0 (en) 2013-10-22 2013-12-04 Rolls Royce Plc Retainer plate
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US10400614B2 (en) * 2016-11-18 2019-09-03 General Electric Company Turbomachine bucket with radial support, shim and related turbomachine rotor
FR3075284B1 (fr) * 2017-12-18 2020-09-04 Safran Aircraft Engines Dispositif amortisseur
US11555407B2 (en) 2020-05-19 2023-01-17 General Electric Company Turbomachine rotor assembly
KR102478172B1 (ko) * 2021-02-02 2022-12-14 두산에너빌리티 주식회사 회전 기계, 이를 포함하는 가스 터빈, 회전 기계의 조립 방법

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8894370B2 (en) 2008-04-04 2014-11-25 General Electric Company Turbine blade retention system and method

Also Published As

Publication number Publication date
JPS59101599A (ja) 1984-06-12
US4478554A (en) 1984-10-23
DE3366620D1 (en) 1986-11-06
EP0110744A1 (de) 1984-06-13
FR2535794A1 (fr) 1984-05-11
FR2535794B1 (de) 1985-01-11
JPS6323397B2 (de) 1988-05-16

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