EP0797005B1 - Festhalter des Schaufelfusses in einem Verdichter - Google Patents

Festhalter des Schaufelfusses in einem Verdichter Download PDF

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Publication number
EP0797005B1
EP0797005B1 EP97400620A EP97400620A EP0797005B1 EP 0797005 B1 EP0797005 B1 EP 0797005B1 EP 97400620 A EP97400620 A EP 97400620A EP 97400620 A EP97400620 A EP 97400620A EP 0797005 B1 EP0797005 B1 EP 0797005B1
Authority
EP
European Patent Office
Prior art keywords
wedge
root
retaining
metal
elastomer
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 - Lifetime
Application number
EP97400620A
Other languages
English (en)
French (fr)
Other versions
EP0797005A1 (de
Inventor
Pierre Xavier Bussonnet
Jack Pierre Lauvergnat
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 EP0797005A1 publication Critical patent/EP0797005A1/de
Application granted granted Critical
Publication of EP0797005B1 publication Critical patent/EP0797005B1/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
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/50—Vibration damping features

Definitions

  • the invention relates to a foot retention device for blades of a fan.
  • the fan blades of turbojets are generally mounted with play in cells fitted in the rim rotor disc and are held in place so known, by wedges slid into the cells under each dawn foot. Fixing means are provided upstream and downstream of the disc to prevent axial displacement of the blades.
  • the object of the invention is to solve these problems and to make a blade retainer allowing to dampen the vibrations of the blades, to avoid tilting of the blade root when the centrifugal forces are weak, and allowing the rotation of the foot of the blades in case of extreme effort to avoid breaking the dawn in its based.
  • the wedge includes a metallic structure with filled hollowed parts by overmolding with a semi-rigid elastomeric material.
  • the wedge has an essentially metallic central area extending to the lateral edge of the wedge located on the side of the dawn extrados.
  • the central metal area has a machined profile set back from the profile of the cell, which allows the rotation of the dawn foot during a shock violent.
  • the hold has two extreme zones upstream and downstream of all-metal structure and two side edges in elastomeric material except in the central metallic area. Between the two lateral edges and on either side of the central metal area the wedge has a part lower metal and an upper part in elastomer.
  • the device for retaining the foot of a blade fan, the dawn having two flanks called respectively lower and upper surfaces, the foot of dawn being engaged in a cell of a rotor disc and held in the cell by a wedge placed under the foot of dawn is characterized in that the wedge is a curved axis plate longitudinal XX 'composed of a metallic structure comprising recessed parts filled by overmolding with a semi-rigid elastomeric material, the shim comprising a essentially metallic central zone extending up to a lateral edge of the wedge located on the side of the upper surface of dawn.
  • a disc of a rotor is shown blower having a rim in which are formed axially oriented cells or grooves 2 and having in section a dovetail shape.
  • each cell 2 is engaged by axial sliding a foot 3 of a blade 4.
  • Foot 3 has a shaped section dovetail.
  • an elastic wedge 5 which maintains the foot 3 against the walls of the cell 2.
  • the wedge 5 shown in Figures 3, 4, 5 is presented in the form of a curved plate of longitudinal axis XX ' composed of a metallic structure comprising parts recesses filled by overmolding with an elastomeric material semi-rigid polyurethane type.
  • the hold has two upstream 10 and downstream end zones 11 and a central zone 12 of entirely structure metallic, the central zone extending to the lateral edge of the hold located on the extrados side of dawn.
  • the hold has two lateral edges in elastomer 13, 14, 15 except in the central metal zone 12 located on the side of the dawn extrados.
  • the wedge consists of a metallic lower part 16, 17 and a part upper in elastomer 18, 19.
  • the central metal zone 12 On the lateral edge of the wedge located on the side of the upper surface of at dawn, the central metal zone 12 has a profile machined back 20 with respect to the profile 21 of the parts upstream and downstream of the hold, and filled with the material elastomer.
  • the recessed machined profile allows deformation in torsion of the central metal zone 12 of the wedge under the effect of the torque produced by the impact on the blade.
  • the deformation of the wedge takes place on the side of the upper surface of dawn, allows a rotation of the foot of the dawn having undergone the shock and eliminates the risk of blade breakage at level of the attachment of the foot.
  • the overmolding of the shim by the elastomeric material is performed at a rating slightly higher than that of the metal part.
  • the elasticity of the elastomeric material allows to mount the wedge in slight compression under the foot of dawn.
  • the wedge 5 ensures the maintenance of the foot 3 of the blades 4 in good position thanks to the stiffness of the zones upstream 10 and downstream 11 metallic associated with the extra thickness polyurethane type elastomer, the shim 5 being mounted in compression under foot 3 of dawn to annihilate the game residual between the wedge and the blade root in cell 2 of the disc 1.
  • wedge 5 ensures the absorption of part of the forces undergone by the impacted dawn thanks to the profile machined in withdrawal 20 from the central metal zone 12. The dawn positioning is retained after the impact.

Landscapes

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

Claims (5)

  1. Festhalter eines Schaufelfußes in einem Verdichter, wobei die Schaufel zwei Seiten aufweist, die Druckseite bzw. Saugseite genannt werden, wobei sich der Schaufelfuß in einer Steckzelle einer Rotorscheibe in Eingriff befindet und in der Steckzelle durch eine Beilage gehalten wird, die unter dem Schaufelfuß angeordnet ist,
       dadurch gekennzeichnet,    dass die Beilage (5) eine gebogene Platte mit einer Längsachse XX' ist, die aus einem metallenen Aufbau besteht, der ausgesparte Bereiche aufweist, die durch Überformen mit einem halbfesten Elastomer gefüllt sind, wobei die Beilage einen zentralen Bereich (12) aufweist, der im wesentlichen aus Metall besteht und sich bis zum Seitenrand der Beilage erstreckt, der sich auf der Saugseite der Schaufel befindet.
  2. Festhalter eines Schaufelfußes in einem Verdichter nach Anspruch 1,
       dadurch gekennzeichnet, dass der metallischen zentrale Bereich (12) ein Profil aufweist, das gegenüber dem Profil (21) der Steckzelle (2) im Rücksprung gearbeitet ist.
  3. Festhalter eines Schaufelfußes in einem Verdichter nach Anspruch 1,
       dadurch gekennzeichnet, dass die Beilage einen äußersten vorderen Bereich (10) und einen äußersten hinteren Bereich (11) mit gänzlich metallischem Aufbau aufweist.
  4. Festhalter eines Schaufelfußes in einem Verdichter nach Anspruch 1,
       dadurch gekennzeichnet, dass die Beilage zwei Seitenränder aus Elastomer (13, 14, 15) aufweist, jedoch nicht in dem metallischen zentralen Bereich (12).
  5. Festhalter eines Schaufelfußes in einem Verdichter nach Anspruch 4,
       dadurch gekennzeichnet, dass die Beilage zwischen den beiden Seitenrändern aus Elastomer (13, 14, 15) und beiderseits des metallischen zentralen Bereichs (12) einen unteren metallischen Bereich (16, 17) und einen oberen Bereich aus Elastomer (18, 19) aufweist.
EP97400620A 1996-03-21 1997-03-20 Festhalter des Schaufelfusses in einem Verdichter Expired - Lifetime EP0797005B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9603497 1996-03-21
FR9603497A FR2746456B1 (fr) 1996-03-21 1996-03-21 Dispositif de retenue du pied des aubes d'une soufflante

Publications (2)

Publication Number Publication Date
EP0797005A1 EP0797005A1 (de) 1997-09-24
EP0797005B1 true EP0797005B1 (de) 2002-09-11

Family

ID=9490380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400620A Expired - Lifetime EP0797005B1 (de) 1996-03-21 1997-03-20 Festhalter des Schaufelfusses in einem Verdichter

Country Status (6)

Country Link
US (1) US5820347A (de)
EP (1) EP0797005B1 (de)
JP (1) JP3907259B2 (de)
CA (1) CA2196745C (de)
DE (1) DE69715278T2 (de)
FR (1) FR2746456B1 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0680408B2 (ja) * 1985-10-09 1994-10-12 株式会社日立製作所 感熱式空気流量計及び感熱抵抗体
FR2803623B1 (fr) * 2000-01-06 2002-03-01 Snecma Moteurs Agencement de retenue axiale d'aubes dans un disque
US6634863B1 (en) * 2000-11-27 2003-10-21 General Electric Company Circular arc multi-bore fan disk assembly
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
FR2845436B1 (fr) * 2002-10-02 2004-12-31 Snecma Moteurs Tambour formant en particulier un rotor de turbomachine, compresseur et turbomoteur comprenant un tel tambour
US6887043B2 (en) * 2003-03-28 2005-05-03 General Electric Company Methods and apparatus for assembling gas turbine engines
FR2856749B1 (fr) * 2003-06-30 2005-09-23 Snecma Moteurs Redresseur de compresseur de moteur aeronautique a aubes collees
FR2881174B1 (fr) * 2005-01-27 2010-08-20 Snecma Moteurs Dispositif de positionnement d'une aube et disque aubage comportant un tel dispositif
CN101151457B (zh) * 2005-03-30 2013-01-16 轻风株式会社 风车
US7488157B2 (en) * 2006-07-27 2009-02-10 Siemens Energy, Inc. Turbine vane with removable platform inserts
US7581924B2 (en) * 2006-07-27 2009-09-01 Siemens Energy, Inc. Turbine vanes with airfoil-proximate cooling seam
US20080298973A1 (en) * 2007-05-29 2008-12-04 Siemens Power Generation, Inc. Turbine vane with divided turbine vane platform
US8186961B2 (en) 2009-01-23 2012-05-29 Pratt & Whitney Canada Corp. Blade preloading system
FR2945074B1 (fr) * 2009-04-29 2011-06-03 Snecma Cale d'aube de soufflante renforcee
FR2978796B1 (fr) * 2011-08-03 2013-08-09 Snecma Roue a aubes de turbomachine
US8851854B2 (en) 2011-12-16 2014-10-07 United Technologies Corporation Energy absorbent fan blade spacer
US10508556B2 (en) 2013-01-17 2019-12-17 United Technologies Corporation Rotor blade root spacer with grip element
GB201417417D0 (en) * 2014-10-02 2014-11-19 Rolls Royce Plc Slider
US10099323B2 (en) * 2015-10-19 2018-10-16 Rolls-Royce Corporation Rotating structure and a method of producing the rotating structure
RU2695872C1 (ru) * 2018-11-12 2019-07-29 Публичное акционерное общество "ОДК-Уфимское моторостроительное производственное объединение" Лопаточный аппарат статора осевого компрессора
CN114876869B (zh) * 2021-02-05 2024-08-06 中国航发商用航空发动机有限责任公司 风扇叶片以及航空发动机
FR3120389B1 (fr) 2021-03-04 2023-06-02 Safran Aircraft Engines Ensemble pour un rotor pour une turbomachine
FR3121171B1 (fr) 2021-03-25 2023-04-14 Safran Aircraft Engines Rotor de soufflante pour une turbomachine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216699A (en) * 1963-10-24 1965-11-09 Gen Electric Airfoil member assembly
US3572970A (en) * 1969-01-23 1971-03-30 Gen Electric Turbomachinery blade spacer
US3910719A (en) * 1973-11-02 1975-10-07 Avco Corp Compressor wheel assembly
GB1549152A (en) * 1977-01-11 1979-08-01 Rolls Royce Rotor stage for a gas trubine engine
CH655547B (de) * 1981-11-10 1986-04-30
FR2535794A1 (fr) * 1982-11-08 1984-05-11 Snecma Dispositif de retenue axiale et radiale d'aubes de soufflante
US5123813A (en) * 1991-03-01 1992-06-23 General Electric Company Apparatus for preloading an airfoil blade in a gas turbine engine
US5236309A (en) * 1991-04-29 1993-08-17 Westinghouse Electric Corp. Turbine blade assembly
US5282720A (en) * 1992-09-15 1994-02-01 General Electric Company Fan blade retainer

Also Published As

Publication number Publication date
JPH108907A (ja) 1998-01-13
FR2746456A1 (fr) 1997-09-26
CA2196745A1 (fr) 1997-09-22
CA2196745C (fr) 2004-09-14
DE69715278T2 (de) 2003-05-08
EP0797005A1 (de) 1997-09-24
DE69715278D1 (de) 2002-10-17
US5820347A (en) 1998-10-13
JP3907259B2 (ja) 2007-04-18
FR2746456B1 (fr) 1998-04-30

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