EP2425100B1 - Cale d'aube de soufflante avec un élastomère - Google Patents

Cale d'aube de soufflante avec un élastomère Download PDF

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Publication number
EP2425100B1
EP2425100B1 EP10718553.0A EP10718553A EP2425100B1 EP 2425100 B1 EP2425100 B1 EP 2425100B1 EP 10718553 A EP10718553 A EP 10718553A EP 2425100 B1 EP2425100 B1 EP 2425100B1
Authority
EP
European Patent Office
Prior art keywords
shim
fan
root
fan blade
blade
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.)
Active
Application number
EP10718553.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2425100A1 (fr
Inventor
Patrick Jean-Louis Reghezza
Julien Tran
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 SAS
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Filing date
Publication date
Application filed by SNECMA SAS filed Critical SNECMA SAS
Publication of EP2425100A1 publication Critical patent/EP2425100A1/fr
Application granted granted Critical
Publication of EP2425100B1 publication Critical patent/EP2425100B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/04—Antivibration arrangements
    • F01D25/06—Antivibration arrangements for preventing blade vibration
    • 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
    • F01D5/3092—Protective layers between blade root and rotor disc surfaces, e.g. anti-friction layers

Definitions

  • the present invention relates generally to the field of aircraft turbojet blowers, and more particularly to the shims intended to be interposed between the foot of the fan blades, and the bottom of the cells defined by the fan disk.
  • Such a turbojet fan is shown exploded on the figure 1 . It generally comprises a disk 2 centered on the axis 4 of the blower, disk on the periphery of which are made teeth 6 spaced circumferentially from each other, and each extending substantially longitudinally and radially, namely substantially parallel to the axis 4. Between two teeth 6 directly consecutive in the circumferential direction, they delimit a cell 8 for receiving the foot 12 of a fan blade 10. In known manner, each tooth has an enlarged head so as to to be able to ensure the retention of the blades in the radial direction towards the outside.
  • the cell 8 has a narrowed external radial end allowing the stamina of the blade 10 to pass, with a narrowed section compared to that of its foot 12.
  • the conferred assembly is of the dovetail type, or also called "fir fastener”.
  • the fan 1 comprises a shim 20 interposed between the lower end of the blade root 12, and a bottom 8a of the cell associated with the blade concerned.
  • the wedge 20 makes it possible to block the blade 10 in the radial direction towards the inside, and also contributes to the plating of the bearing surfaces of the foot 12 against the energy end of the teeth 6.
  • the wedge 20 comprises a stop 22 for axial retention of its associated blade, this stop 22 being intended to bear against a retention ring (not shown) carried by the disk 2 and centered on the axis 4.
  • the shim 20 conventionally has a metal frame 24 around which is placed one or more outer elements 26 made of elastomeric material, this element 26 being in contact with the bottom 8a of the cell and the radially inner end of the foot 12 of dawn.
  • each element 26 is made by injection molding on the metal reinforcement, which is preferably made of titanium.
  • the overmoulding process used is such as to cause the outer element 26 of elastomeric material to adhere to a support surface provided on the reinforcement 24.
  • outer member 26 also referred to as a delamination problem. Indeed, this problem arises essentially when the wedge 20 is inserted between the foot 12 and the bottom of the cell 8a during engine assembly and / or during handling operations requiring such a wedge introduction. As has been schematized on the figure 1 it is noted that the introduction of the wedge into its dedicated space is made by sliding it along its longitudinal direction 30, generally slightly curvilinear.
  • the blade retention properties associated with this wedge may no longer be satisfied.
  • the wedge also having a vibration reduction function within the blade, its deterioration leads to lowering the vibration damping level experienced by the fan blade in operation.
  • FR-A-2841609 discloses a shim having a metal frame and having recessed portions filled by overmolding with an elastomeric material.
  • the invention therefore aims to at least partially overcome the disadvantages mentioned above relating to the achievements of the prior art.
  • the invention firstly relates to a shim according to claim 1 or 2.
  • the wedge takes the form of a band extending in a longitudinal direction, said corrugated zone having a plurality of waves succeeding one another in the same direction.
  • the waves thus arranged make it possible to withstand the delamination of the outer element made of elastomer material even more effectively when the wedge is introduced between the blade root and the cell bottom. Indeed, these waves then constitute direct obstacles to the relative displacement between the frame and the outer element of the hold, in the longitudinal direction, which usually corresponds to the direction of introduction of the hold in its dedicated space under the dawn.
  • the outer element of elastomeric material is overmolded on the metal reinforcement, preferably by injection under pressure.
  • the metal reinforcement is made of titanium.
  • the invention also relates to a turbojet fan comprising a plurality of fan blades and a disk defining at its periphery a plurality of cells, the foot of each fan blade being housed in one of the cells, and a shim as described above being interposed between the bottom of the cell and said foot.
  • each shim travels along the foot of its associated fan blade.
  • each shim has an axial retention stop of its associated fan blade.
  • the invention also relates to an aircraft turbojet engine comprising a fan as described above.
  • a shim 120 according to a preferred embodiment of the present invention.
  • This shim whose outer shape is substantially identical or similar to that of the wedge 20 of the prior art described on figures 1 and 2 , also has a general shape of strip extending in a longitudinal direction 130, of substantially curvilinear shape, corresponding to the direction in which also extends the foot 12 of its associated blade and the cell bottom 8a.
  • the shim 120 is intended to be introduced between the blade 10 and the bottom 8a of the cell 8 shown in FIG. figure 1 , always for the purpose of retention of the dawn as well as damping of the vibrations undergone by this one.
  • the metal armature 124 preferably of titanium, is equipped with an outer element of elastomeric material referenced 126, which partially covers the outer surface of this armature.
  • the outer element 126 made by overmolding by pressure injection of elastomeric material on the armature 124, leaves free a portion of the outer surface of this armature.
  • each corrugated zone 136 is in fact formed from a succession of waves 140 between which there are rounded depressions 142.
  • the latter comes into the 142, which has the dual effect of increasing the adhesion surface of the element 126 on the armature 124, and to create a plurality of mechanical engagement of the waves of the armature in the recesses of the outer element, and vice versa.
  • each corrugated zone 136 follow one another in the longitudinal direction 130 in which the wedge 120 is usually moved relative to the disk 2, so as to be interposed between the blade root 12 and the cell bottom 8a.
  • two corrugated zones 136 oriented in opposite directions are provided, one of which may optionally be interrupted, in one or more places, by a portion of the armature 124 intended to constitute a part of the outer surface of the shim finished.
  • the two corrugated zones 136 are interconnected by a radially outer zone 146 and a radially internal zone (not visible on the figure 4 ), these two areas being preferably flat and parallel to the direction 130.
  • they are an integral part of the support surface 134 on which the element of elastomeric material 126 is intended to adhere, once the molding overmolding performed.
  • the shim 120 here also has a stop 122 for axial retention of its associated fan blade, having the same geometry as the abutment 22 shown on the shim 20 of the figure 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Gasket Seals (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP10718553.0A 2009-04-29 2010-04-28 Cale d'aube de soufflante avec un élastomère Active EP2425100B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0952812A FR2945074B1 (fr) 2009-04-29 2009-04-29 Cale d'aube de soufflante renforcee
PCT/EP2010/055689 WO2010125089A1 (fr) 2009-04-29 2010-04-28 Cale d'aube de soufflante renforcee

Publications (2)

Publication Number Publication Date
EP2425100A1 EP2425100A1 (fr) 2012-03-07
EP2425100B1 true EP2425100B1 (fr) 2015-02-18

Family

ID=41508313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10718553.0A Active EP2425100B1 (fr) 2009-04-29 2010-04-28 Cale d'aube de soufflante avec un élastomère

Country Status (9)

Country Link
US (1) US8870545B2 (zh)
EP (1) EP2425100B1 (zh)
JP (1) JP5699131B2 (zh)
CN (1) CN102414397B (zh)
BR (1) BRPI1013981B1 (zh)
CA (1) CA2760290C (zh)
FR (1) FR2945074B1 (zh)
RU (1) RU2526607C2 (zh)
WO (1) WO2010125089A1 (zh)

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RU185519U1 (ru) * 2017-08-16 2018-12-07 ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ БЮДЖЕТНОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ОБРАЗОВАНИЯ "Брянский государственный технический университет" Демпфирующее устройство рабочих лопаток тепловых турбин
US10738626B2 (en) * 2017-10-24 2020-08-11 General Electric Company Connection assemblies between turbine rotor blades and rotor wheels
CN109630465A (zh) * 2018-12-16 2019-04-16 中国航发沈阳发动机研究所 一种风扇垫片
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KR102355521B1 (ko) 2020-08-19 2022-01-24 두산중공업 주식회사 압축기 블레이드의 조립구조와 이를 포함하는 가스 터빈 및 압축기 블레이드의 조립방법
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Also Published As

Publication number Publication date
RU2526607C2 (ru) 2014-08-27
FR2945074A1 (fr) 2010-11-05
JP5699131B2 (ja) 2015-04-08
CN102414397B (zh) 2015-02-18
CN102414397A (zh) 2012-04-11
RU2011148428A (ru) 2013-06-10
WO2010125089A1 (fr) 2010-11-04
CA2760290A1 (fr) 2010-11-04
CA2760290C (fr) 2017-03-07
US8870545B2 (en) 2014-10-28
FR2945074B1 (fr) 2011-06-03
BRPI1013981B1 (pt) 2020-06-23
US20120107125A1 (en) 2012-05-03
JP2012525530A (ja) 2012-10-22
BRPI1013981A2 (pt) 2016-04-05
EP2425100A1 (fr) 2012-03-07

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