EP1540189A1 - Restraining device for fan blade root - Google Patents
Restraining device for fan blade rootInfo
- Publication number
- EP1540189A1 EP1540189A1 EP03761637A EP03761637A EP1540189A1 EP 1540189 A1 EP1540189 A1 EP 1540189A1 EP 03761637 A EP03761637 A EP 03761637A EP 03761637 A EP03761637 A EP 03761637A EP 1540189 A1 EP1540189 A1 EP 1540189A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- wedge
- end zones
- metallic structure
- downstream
- 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
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
- F01D5/32—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 device for retaining the foot of the fan blades. More specifically, it relates to a shim intended to retain the foot of a fan blade in a curvilinear cell formed at the periphery of a rotor disc, said blade comprising two flanks called intrados and extrados respectively, said shim being in the form of a curvilinear plate made up of a metallic structure having recessed parts filled by overmolding with a semi-rigid elastomeric material, in particular on the lateral edge located on the side of the lower surface of the blade between two extreme zones upstream and downstream of entirely metallic structure, on the lateral edge situated on the side of the upper surface of the blade between a central zone of essentially metallic structure and said end zones, and on the two upper parts of said wedge which extend between said two lateral edges made of elastomer, on either side of said central metallic zone.
- Such a shim is disclosed by FR 2 746456 which represents the state of the art closest to the invention.
- These wedges engaged under the blade roots make it possible to dampen the vibrations of the blades, to prevent the tilting of the blade root when the centrifugal forces are low, and to a certain extent allow the rotation of the blade foot in the event of extreme effort, following the percussion of this blade by a body ingested by the fan for example, in order to avoid the rupture of said blade at its base.
- the central metal zone has a machined profile set back from the profile of the cell.
- the wedge has between the two lateral elastomer edges, on either side of the central metal area, a metallic lower part which rests on the bottom of the cell.
- the plate can only pivot at a very small angle owing to the high stiffness of the metal structure.
- the object of the invention is to improve the resistance of the struck blade by ensuring that the wedge can absorb part of the impact energy beyond the rotation allowed by the wedge according to the state of the technique.
- the object is achieved according to the invention by the fact that the metal structure further comprises a lower recess which extends between the two end zones upstream and downstream over its entire surface.
- the wedge thus works according to the principle of a leaf spring in the event of a violent impact on the blade.
- the lower recess is advantageously connected to the upstream and downstream end zones by lunules.
- the lower recess is filled by overmolding with the semi-rigid elastomeric material.
- the central zone has a profile set back from the profile of the cell.
- FIG. 1 is a radial section of a device for retaining a blade root of a fan
- - Figure 2 is a cross section of a blade root housed in a cell and held by means of a wedge according to the invention
- - Figure 3 is a longitudinal sectional view of a wedge retaining a blade root according to the invention
- FIG. 4 is a top view of the wedge of FIG. 3,
- FIG. 5 is a section along the line V-V in FIG. 4,
- FIG. 6 is a view in longitudinal section of the retaining wedge according to the invention subjected to a compressive force following the rotation of the blade
- FIG. 7 is a longitudinal section of a variant of the retaining wedge according to the invention.
- Figures 1 and 2 show a fan rotor disk 1 which has at its periphery a plurality of cells 2 of curvilinear shape in each of which is engaged by sliding the foot 3 of a blade 4.
- the foot 3 has a section in dovetail shape.
- an elastic wedge 5 which holds the foot 3 against the walls of the cell 2.
- the wedge 5 shown in Figures 3, 4 and 5 is present in the form of a curvilinear plate with a longitudinal axis XX '. It is made up of a metal structure having recessed parts filled by overmolding with a semi-rigid elastomeric material.
- the wedge 5 has two end zones upstream 10 and downstream 11 of entirely metallic structure connected together by a metallic intermediate part of variable section which has:
- a recess 13 filled with an elastomeric material forming a lateral edge which extends between the upstream 10 and downstream 13 end zones,
- the lower face 20 of the metallic intermediate part connecting the end zones upstream 10 and downstream 11 entirely made of metal is therefore in a plane substantially parallel to the plane containing the lower faces of the end zones upstream 10 and downstream 11.
- the metal intermediate part thus behaves as a leaf spring in the case where it is subjected to compression forces applied in particular above the central metallic zone 12.
- the lower recess 21 can possibly be filled with the elastomeric material, but this is not compulsory.
- the overmolding of the metallic structure by the elastomeric material is carried out at a slightly higher rib than that of the metallic part. This arrangement makes it possible to mount the shim 5 in compression under the foot 3 of the blade 4 in order to annihilate the residual clearance between the shim 5 and the blade foot in the cavity 2 of the disc 1.
- the cross section of the shim 5 is substantially homogeneous from one end to the other of this shim 5.
- the central metal zone 12 may have, if necessary, a machined profile 22 set back relative to the profile 23 of the cell 2 to allow rotation of the foot 3 of the blade 4 around the axis BB 'in case of violent impact on the lower surface of dawn 4.
- This axis BB ′ intersects the median transverse plane of the shim 5 at the point referenced Q in FIGS. 2 and 4, off-center with respect to dawn 4 because the alveolus 2 is curvilinear.
- FIG. 6 shows the deformation undergone by the metallic intermediate part of the shim 5 in the event of a violent impact from the blade 4.
- the depth of the recess 21 can be determined in such a way that the shim 5 functions as a spring, all retaining its elasticity. It can also be determined so that the shim 5 deforms plastically and absorbs part of the impact energy.
- the lower surface of the intermediate part can be connected to the upstream 10 and downstream 11 end zones by lunules 16 and 17, as shown in FIG. 7.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Gasket Seals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0207977A FR2841609B1 (en) | 2002-06-27 | 2002-06-27 | BLOWER RETAINER LEVEL RETAINER |
FR0207977 | 2002-06-27 | ||
PCT/FR2003/001955 WO2004003390A1 (en) | 2002-06-27 | 2003-06-25 | Restraining device for fan blade root |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1540189A1 true EP1540189A1 (en) | 2005-06-15 |
EP1540189B1 EP1540189B1 (en) | 2010-06-16 |
Family
ID=29724920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03761637A Expired - Lifetime EP1540189B1 (en) | 2002-06-27 | 2003-06-25 | Restraining device for fan blade root |
Country Status (9)
Country | Link |
---|---|
US (1) | US7108484B2 (en) |
EP (1) | EP1540189B1 (en) |
JP (1) | JP4188320B2 (en) |
AU (1) | AU2003263256A1 (en) |
CA (1) | CA2489787C (en) |
DE (1) | DE60333021D1 (en) |
FR (1) | FR2841609B1 (en) |
RU (1) | RU2309301C2 (en) |
WO (1) | WO2004003390A1 (en) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2881174B1 (en) | 2005-01-27 | 2010-08-20 | Snecma Moteurs | DEVICE FOR POSITIONING A DASHBOARD AND AUBAGE DISK COMPRISING SUCH A DEVICE |
FR2918129B1 (en) | 2007-06-26 | 2009-10-30 | Snecma Sa | IMPROVEMENT TO AN INTERCALE BETWEEN A FOOT OF DAWN AND THE BACKGROUND OF THE ALVEOLE OF THE DISK IN WHICH IT IS MOUNTED |
FR2927998A1 (en) * | 2008-02-25 | 2009-08-28 | Snecma Sa | TESTING MACHINE FOR A WAVE FOOT COATING. |
FR2927997A1 (en) * | 2008-02-25 | 2009-08-28 | Snecma Sa | METHOD FOR TESTING A WAVE FOOT COATING |
US8186961B2 (en) | 2009-01-23 | 2012-05-29 | Pratt & Whitney Canada Corp. | Blade preloading system |
FR2945074B1 (en) * | 2009-04-29 | 2011-06-03 | Snecma | REINFORCED BLOW OF BREATHING BLADE |
US8616850B2 (en) * | 2010-06-11 | 2013-12-31 | United Technologies Corporation | Gas turbine engine blade mounting arrangement |
FR2974864B1 (en) * | 2011-05-04 | 2016-05-27 | Snecma | ROTOR OF TURBOMACHINE WITH MEANS OF AXIAL RETENTION OF AUBES |
FR2975428B1 (en) * | 2011-05-17 | 2015-11-20 | Snecma | TURBOMACHINE AUBES WHEEL |
FR2978796B1 (en) * | 2011-08-03 | 2013-08-09 | Snecma | TURBOMACHINE AUBES WHEEL |
US8716673B2 (en) * | 2011-11-29 | 2014-05-06 | Fei Company | Inductively coupled plasma source as an electron beam source for spectroscopic analysis |
US8851854B2 (en) | 2011-12-16 | 2014-10-07 | United Technologies Corporation | Energy absorbent fan blade spacer |
GB201212750D0 (en) * | 2012-07-18 | 2012-08-29 | Rolls Royce Plc | A rotor assembly |
FR2996584A1 (en) * | 2012-10-10 | 2014-04-11 | Snecma | FOOTBED FOR LEVELED BLADE FOOT |
US9359906B2 (en) * | 2012-12-18 | 2016-06-07 | United Technologies Corporation | Rotor blade root spacer with a fracture feature |
US9422819B2 (en) * | 2012-12-18 | 2016-08-23 | United Technologies Corporation | Rotor blade root spacer for arranging between a rotor disk and a root of a rotor blade |
EP2946080B1 (en) | 2013-01-17 | 2018-05-30 | United Technologies Corporation | Rotor blade root spacer with grip element |
EP3058179B1 (en) * | 2013-10-11 | 2020-01-15 | United Technologies Corporation | Compressible fan blade with root spacer |
GB201417417D0 (en) | 2014-10-02 | 2014-11-19 | Rolls Royce Plc | Slider |
US10465537B2 (en) * | 2016-05-27 | 2019-11-05 | General Electric Company | Margin bucket dovetail radial support feature for axial entry buckets |
US10738626B2 (en) | 2017-10-24 | 2020-08-11 | General Electric Company | Connection assemblies between turbine rotor blades and rotor wheels |
CN109630465A (en) * | 2018-12-16 | 2019-04-16 | 中国航发沈阳发动机研究所 | A kind of fan gasket |
US11555407B2 (en) | 2020-05-19 | 2023-01-17 | General Electric Company | Turbomachine rotor assembly |
KR102454379B1 (en) * | 2020-09-08 | 2022-10-14 | 두산에너빌리티 주식회사 | rotor and turbo-machine comprising the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3216699A (en) * | 1963-10-24 | 1965-11-09 | Gen Electric | Airfoil member assembly |
US5123813A (en) * | 1991-03-01 | 1992-06-23 | General Electric Company | Apparatus for preloading an airfoil blade in a gas turbine engine |
FR2746456B1 (en) * | 1996-03-21 | 1998-04-30 | Snecma | DEVICE FOR RETAINING THE FOOT OF THE BLADES OF A BLOWER |
FR2807096B1 (en) * | 2000-03-30 | 2002-05-31 | Abb Alstom Power Nv | ROTOR DISC OF TURBINE EQUIPPED WITH FINS ON FOOT AND TREE OF MOUNTING A FIN ON A DISC |
US6481971B1 (en) * | 2000-11-27 | 2002-11-19 | General Electric Company | Blade spacer |
-
2002
- 2002-06-27 FR FR0207977A patent/FR2841609B1/en not_active Expired - Fee Related
-
2003
- 2003-06-25 DE DE60333021T patent/DE60333021D1/en not_active Expired - Lifetime
- 2003-06-25 WO PCT/FR2003/001955 patent/WO2004003390A1/en active Application Filing
- 2003-06-25 EP EP03761637A patent/EP1540189B1/en not_active Expired - Lifetime
- 2003-06-25 US US10/517,611 patent/US7108484B2/en not_active Expired - Lifetime
- 2003-06-25 CA CA2489787A patent/CA2489787C/en not_active Expired - Lifetime
- 2003-06-25 JP JP2004516862A patent/JP4188320B2/en not_active Expired - Lifetime
- 2003-06-25 AU AU2003263256A patent/AU2003263256A1/en not_active Abandoned
- 2003-06-25 RU RU2005101881/06A patent/RU2309301C2/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2004003390A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2309301C2 (en) | 2007-10-27 |
JP2005530955A (en) | 2005-10-13 |
CA2489787C (en) | 2011-08-09 |
CA2489787A1 (en) | 2004-01-08 |
WO2004003390A1 (en) | 2004-01-08 |
JP4188320B2 (en) | 2008-11-26 |
FR2841609B1 (en) | 2004-09-10 |
EP1540189B1 (en) | 2010-06-16 |
FR2841609A1 (en) | 2004-01-02 |
US7108484B2 (en) | 2006-09-19 |
AU2003263256A1 (en) | 2004-01-19 |
DE60333021D1 (en) | 2010-07-29 |
RU2005101881A (en) | 2005-10-27 |
US20050254951A1 (en) | 2005-11-17 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BASSOT, ALAIN Inventor name: REGHEZZA, PATRICK Inventor name: FOLLONIER, CHRISTOPHE Inventor name: THENAISIE, ANNE Inventor name: PONTOIZEAU, BRUCE Inventor name: BUISSON, HERVE Inventor name: INGHELS, ERIC |
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