EP0797005B1 - Dispositif de retenue du pied des aubes d'une soufflante - Google Patents
Dispositif de retenue du pied des aubes d'une soufflante Download PDFInfo
- 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
Links
Images
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)
Description
- la figure 1, une vue en coupe radiale du dispositif de retenue d'un pied d'aube d'une soufflante, selon l'invention;
- la figure 2, une vue de face d'un pied d'aube logé dans un alvéole et maintenu au moyen d'une cale, selon l'invention ;
- la figure 3, une vue en coupe longitudinale d'une cale de retenue d'un pied d'aube, selon l'invention ;
- la figure 4, une vue de dessus de la cale de la figure 3, selon l'invention
- la figure 5 une vue de face selon la ligne A-A de la cale de la figure 3, selon l'invention.
Claims (5)
- Dispositif de retenue du pied d'une aube de soufflante, l'aube comportant deux flancs appelés respectivement intrados et extrados, le pied de l'aube étant engagé dans un alvéole d'un disque de rotor et maintenu dans l'alvéole par une cale placée sous le pied de l'aube, caractérisé en ce que la cale (5) est une plaque curviligne d'axe longitudinal XX' composée d'une structure métallique comportant des parties évidées comblées par surmoulage avec un matériau élastomère semi-rigide, la cale comportant une zone centrale (12) essentiellement métallique s'étendant jusqu'à un bord latéral de la cale situé du côté de l'extrados de l'aube.
- Dispositif de retenue du pied d'une aube de soufflante selon la revendication 1, caractérisé en ce que la zone centrale métallique (12) comporte un profil usiné en retrait (20) par rapport au profil (21) de l'alvéole (2).
- Dispositif de retenue du pied d'une aube de soufflante selon la revendication 1, caractérisé en ce que la cale comporte deux zones extrêmes amont (10) et aval (11) de structure entièrement métallique.
- Dispositif de retenue du pied d'une aube de soufflante selon la revendication 1, caractérisé en ce que sauf dans la zone centrale métallique (12), la cale comporte deux bords latéraux en élastomère (13, 14, 15).
- Dispositif de retenue du pied d'une aube de soufflante selon la revendication 4, caractérisé en ce que entre les deux bords latéraux en élastomère (13, 14, 15) et de part et d'autre de la zone centrale métallique (12), la cale comporte une partie inférieure métallique (16, 17) et une partie supérieure en élastomère (18, 19).
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 (fr) | 1997-09-24 |
EP0797005B1 true EP0797005B1 (fr) | 2002-09-11 |
Family
ID=9490380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97400620A Expired - Lifetime EP0797005B1 (fr) | 1996-03-21 | 1997-03-20 | Dispositif de retenue du pied des aubes d'une soufflante |
Country Status (6)
Country | Link |
---|---|
US (1) | US5820347A (fr) |
EP (1) | EP0797005B1 (fr) |
JP (1) | JP3907259B2 (fr) |
CA (1) | CA2196745C (fr) |
DE (1) | DE69715278T2 (fr) |
FR (1) | FR2746456B1 (fr) |
Families Citing this family (23)
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 |
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 |
US7581924B2 (en) * | 2006-07-27 | 2009-09-01 | Siemens Energy, Inc. | Turbine vanes with airfoil-proximate cooling seam |
US7488157B2 (en) * | 2006-07-27 | 2009-02-10 | Siemens Energy, Inc. | Turbine vane with removable platform inserts |
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 |
WO2014113009A1 (fr) | 2013-01-17 | 2014-07-24 | United Technologies Corporation | Entretoise d'emplanture de pale de rotor équipée d'élément de prise |
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 |
CN114876869A (zh) * | 2021-02-05 | 2022-08-09 | 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)
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 (fr) * | 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 |
-
1996
- 1996-03-21 FR FR9603497A patent/FR2746456B1/fr not_active Expired - Fee Related
-
1997
- 1997-02-04 CA CA002196745A patent/CA2196745C/fr not_active Expired - Fee Related
- 1997-03-17 US US08/818,941 patent/US5820347A/en not_active Expired - Lifetime
- 1997-03-20 DE DE69715278T patent/DE69715278T2/de not_active Expired - Fee Related
- 1997-03-20 EP EP97400620A patent/EP0797005B1/fr not_active Expired - Lifetime
- 1997-03-21 JP JP06851797A patent/JP3907259B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH108907A (ja) | 1998-01-13 |
DE69715278D1 (de) | 2002-10-17 |
EP0797005A1 (fr) | 1997-09-24 |
JP3907259B2 (ja) | 2007-04-18 |
FR2746456B1 (fr) | 1998-04-30 |
CA2196745C (fr) | 2004-09-14 |
US5820347A (en) | 1998-10-13 |
DE69715278T2 (de) | 2003-05-08 |
FR2746456A1 (fr) | 1997-09-26 |
CA2196745A1 (fr) | 1997-09-22 |
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