WO2017162975A1 - Plateforme, disque et ensemble de soufflante - Google Patents
Plateforme, disque et ensemble de soufflante Download PDFInfo
- Publication number
- WO2017162975A1 WO2017162975A1 PCT/FR2017/050649 FR2017050649W WO2017162975A1 WO 2017162975 A1 WO2017162975 A1 WO 2017162975A1 FR 2017050649 W FR2017050649 W FR 2017050649W WO 2017162975 A1 WO2017162975 A1 WO 2017162975A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- platform
- disk
- upstream
- disc
- axial
- Prior art date
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
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
- F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/005—Sealing means between non relatively rotating elements
- F01D11/006—Sealing the gap between rotor blades or blades and rotor
- F01D11/008—Sealing the gap between rotor blades or blades and rotor by spacer elements between the blades, e.g. independent interblade platforms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
- F05D2220/323—Application in turbines in gas turbines for aircraft propulsion, e.g. jet engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/36—Application in turbines specially adapted for the fan of turbofan engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/80—Platforms for stationary or moving blades
Definitions
- the present invention relates to the general field of aeronautical turbomachines, and more specifically to the field of blade and disk platforms of the blower of an aerospace turbine engine, an assembly comprising the platforms and the disk, and a fan comprising this assembly.
- the blade platforms of the blower must perform several functions. From an aerodynamic point of view, these platforms have the primary function of defining the flow vein of the air. In addition, they must also be able to withstand significant effort by deforming as little as possible and remaining attached to the disc that carries them.
- the platforms have a first part making it possible to define the air flow vein and to ensure the retention of the platform when the engine is rotating, and a second part to limit the deformations of the first part under the effects of centrifugal forces and maintain the platform in position when the engine is stopped.
- the platform can take the form of a box with a two-dimensional vein wall retained downstream by a drum and upstream by a ferrule, the upstream retention by the ferrule being carried out above the tooth of the fan disk (a flange of the ferrule blocking the axle axially and radially upstream).
- Such upstream retention performed above the disk tooth with a ferrule has the disadvantage of imposing a high hub ratio, the hub ratio being the ratio of the radius taken between the axis of rotation and the point of the edge. attacking the dawn flush on the surface of the platform, on the radius between the axis of rotation and the point of the outermost leading edge. Moreover, this upstream retention is likely to generate over-stresses on the tooth and in the cell of the disc, at the level of the connection between the ferrule and the disc.
- One embodiment relates to a platform adapted to be interposed between two adjacent blades of a fan, and comprising:
- axial is understood in the direction of the greater length of the platform, and “radial”, one understands the direction perpendicular to the axial direction and the main surface of the bottom wall.
- upstream it comprises upstream relative to the direction of flow of air, when the platform is supported on a fan disk.
- the platform can take the form of a box formed by the assembly of the vein wall and the bottom wall.
- the vein wall defines the flow vein of the air entering the blower.
- the bottom wall makes it possible to maintain the vein wall in position and also to limit its deformations under the effect of centrifugal forces.
- the bottom wall also has a main surface that can bear on a fan disk.
- the axial and radial retention surfaces arranged on two axial ends of the platform, allow to retain and maintain in position the platform relative to the disk on which it is supported, when the disk is moving.
- the radial retention surface disposed on the upstream axial end of the platform is offset radially with respect to a main surface of the bottom wall.
- radially offset is understood shifted in the direction of support of the bottom wall on the disk.
- the radial retention surface and the main surface of the bottom wall may be substantially parallel to one another.
- This offset of the radial retention surface makes it possible to modify the shape of the upstream axial end of the vein wall, and therefore of the platform, with respect to known platforms.
- the platform may take the form of a plunger, that is to say whose upstream axial end is offset radially relative to the main surface of the bottom wall. This modification of the shape of the platform thus makes it possible to modify the air flow duct when the platform is placed in a blower, is therefore to reduce the hub ratio in order to improve the performance of the blower, and therefore of the turbine engine in which the fan is mounted.
- the bottom wall has a surface inclined with respect to the main surface of the bottom wall, continuously connecting the main surface of the bottom wall and the radial retention surface disposed on the axial end. upstream of the platform.
- the radial retention surface disposed on the upstream axial end of the platform being radially offset relative to the main surface of the bottom wall, the inclined surface corresponds to the area of the bottom wall to compensate for the offset between the surface. radial retention and the main surface of the bottom wall. It is therefore understood that the inclined surface bears on the disk.
- the radial retention surface disposed on the upstream axial end of the platform, the inclined surface and the main surface of the bottom wall can be in one piece constituting the bottom wall.
- the inclined surface makes it possible to modify the shape of the platform and to optimize it in order to reduce the hub ratio, thereby improving the performance of the fan and the turbomachine.
- the inclined surface is a straight wall portion.
- the straight wall portion linearly connects the radial retention surface with the main surface of the bottom wall, thereby changing the shape of the upstream axial end of the platform to decrease the hub ratio.
- This rectilinear wall portion has the advantage of having a simple shape and easy to achieve, for example by machining.
- the inclined surface is a curvilinear wall portion.
- the curvilinear wall portion progressively connects the radial retention surface with the main surface of the bottom wall, thereby changing the shape of the upstream axial end of the platform to decrease the hub ratio.
- This portion of curvilinear wall has the advantage of softening the change of slope from the main surface of the bottom wall, avoiding the presence of a break at the junction between the inclined surface and the main surface, unlike the rectilinear wall portion, and thus reduce the stresses at this junction.
- the inclined surface and the vein wall are substantially parallel.
- the upstream axial end of the platform has a plunging shape, the inclined surface and the vein portion being inclined radially in the same way in the support direction of the platform on the disc.
- This shape of the upstream axial end of the platform makes it possible to reduce the hub ratio.
- the present disclosure also relates to a disc adapted to support platforms and vanes of a blower, and comprising:
- a plurality of axial projections disposed radially around the axis of the disk on the upstream face of the disk, and capable of being fixed to a fan platform retention flange, characterized in that the projections are shifted radially inwardly of the disc relative to the teeth of the disc.
- upstream face one understands upstream with respect to the direction of flow of the air, when the disc is arranged in a blower.
- axial projections is understood axial in the direction of flow of the air, when the disc is disposed in a blower.
- radially offset is understood shifted inwardly of the disk, that is to say towards the axis of rotation of the disk.
- the disk can have as many axial projections as teeth.
- the axial projections may each have an orifice allowing the axial projections to be attached to a fan platform retention flange, for example using a screw or bolt.
- the axial projections being offset radially inwardly of the disk relative to the teeth of the disk, when the projections are fixed on a platform retaining flange, the fixing area on the projections is thus offset radially relative to the teeth of the plate. disk.
- This has the advantage of limiting the stresses at the tooth of the disk, when an external element, for example a platform retention flange, is fixed on the disk.
- this fixing zone being radially offset relative to the teeth of the disc, this has the advantage of freeing space at the upstream axial end of the disc tooth, allowing for example to machine the tooth of the disc.
- the axial projections are studs machined on the upstream face of the disk.
- the fixing holes may be used to fix an element external to the disk, for example a retention flange or a ferrule, by means of a screw or a bolt, for example.
- the axial projections may also include an insertion port machined radially on an outer face of the projections. The insertion holes can be used to insert fasteners, through which an outer member can be attached to the disc.
- an upstream axial end of the disc teeth has a beveled surface.
- the bevelled surface may be in the form of an inclined surface, with respect to a major surface of the disc tooth, towards the interior of the disc.
- the bevelled surface can be made by machining the upstream axial end of the disc tooth, for example. This machining is possible thanks to the space released by the radial offset of the axial projections on the upstream face of the disc.
- the presence of this beveled surface has the advantage of being able to adapt the shape of the disc tooth to the shape of a platform coming to bear on the tooth, and thus to reduce the hub ratio to improve the performance of the blower.
- the present disclosure also relates to an assembly comprising a disk and at least one platform, and further comprising at least one upstream retention flange to ensure the axial and radial retention of the upstream axial end of the platform, in which the retention flange upstream is fixed on a projection of the upstream face of the disk.
- the interface between the flange and the disc is radially offset towards the inside of the disc, relative to the tooth of the disc, compared to known systems in which this interface is located at the tooth of the disc.
- This offset makes it possible to limit the stresses at the upstream axial end of the teeth and the grooves of the disc.
- the offset of this interface makes it possible to free up space at the upstream axial end of the tooth of the disc, offering more possibility of machining the tooth and thus of modifying the shape of the platform and thus, the reduction of the hub ratio.
- the inclined surface of the bottom wall is in contact with the beveled surface of the tooth of the disk and the inclined surface and the beveled surface are parallel.
- the disc tooth can be more freely machined.
- the upstream axial end of the tooth may have a beveling to adapt to the shape of the platform, the beveled surface being parallel to the inclined surface of the platform.
- the upstream retention flange is a ferrule.
- the present disclosure also relates to a turbomachine blower comprising an assembly according to any one of the embodiments described herein, and a plurality of vanes mounted in the grooves of the disc.
- FIG. 1 is a schematic sectional view of a turbomachine according to the invention
- FIG. 2 is a schematic view along direction II of the fan of FIG. 1,
- FIGS. 3A and 3B are views in longitudinal section of a platform according to the invention.
- FIG. 4 is a perspective view of a disk according to the invention.
- Figure 5 is a longitudinal sectional view of an assembly comprising a retention flange, a platform and a disc according to the invention.
- Figure 1 shows a schematic longitudinal sectional view of a turbofan engine 1 centered on the axis A according to the invention. It comprises, from upstream to downstream: a fan 2, a low compressor pressure 3, a high pressure compressor 4, a combustion chamber 5, a high pressure turbine 6, and a low pressure turbine 7.
- FIG. 2 shows a schematic view of the fan 2 of FIG. 1 along the direction II.
- the fan 2 comprises a fan disk 40 in which a plurality of grooves 42 are formed at its outer periphery. These grooves 42 are rectilinear and extend axially from upstream to downstream all along the disc 40. They are also regularly distributed around the axis A of the disc 40. In this way, each groove 42 defines with its neighbor a tooth 44 which also extends axially from upstream to downstream along the disc 40. Equivalently, a groove 42 is delimited between two adjacent teeth 44.
- the fan 2 further comprises a plurality of blades 20 of curvilinear profile (only four blades 20 have been shown in Figure 2).
- Each blade 20 has a foot 20a which is mounted in a respective groove 42 of the fan disk 40.
- the root 20a of a blade 20 may have a fir or dovetail shape adapted to the geometry of the blades. grooves 42.
- the fan 2 comprises a plurality of reported platforms 30, each platform 30 being mounted in the gap between two adjacent fan blades 20, in the vicinity of the feet 20a thereof, in order to delimit, on the inside, a vein annular air inlet into the blower 2, the vein being delimited on the outer side by a fan casing.
- Figures 1 and 2 also show an inner radius RI and an outer radius RE.
- the internal radius R1 corresponds to the radius between the axis of rotation A and the point of the leading edge of a blade 20 flush with the surface of a platform 30.
- the outer radius RE corresponds to the radius taken between the rotation axis A and the point of the leading edge of an outermost blade 20.
- These two radii RI, RE are those used in the calculation of the hub ratio RI / RE that the assembly according to the invention proposes to decrease (in particular reducing the internal radius RI). In other words, the reduction of the hub ratio, in particular by acting on the internal radius RI, amounts to bringing the aerodynamic stream of air intake closer to the fan disk.
- FIGS. 3A and 3B show views in longitudinal section of the platform 30.
- the platform 30, object of the present invention comprises a vein wall 34, a bottom wall 36, and radial and axial retention surfaces 38 and 39 disposed at the two axial ends of the platform 30.
- the assembly formed by the vein wall 34 and the wall of 36 forms a box 32, forming the platform 30.
- the bottom wall consists of a main surface 36a and a inclined surface 36b.
- the inclined surface 36b continuously connects the main surface 36a and the retention surface 38, so that the retention surface 38, located at the upstream axial end of the platform, is radially offset from the main surface 36a.
- the inclined surface 36b is a rectilinear wall portion.
- the inclined surface 36b is a curvilinear wall portion.
- Figure 4 shows a perspective view of a fan disk having an outer surface 40a and an upstream face 40b.
- the outer surface 40a has a succession of grooves 42 in which can be housed a foot 20a blade 20 blower, and teeth 44 interposed between the grooves 42, capable of supporting the platforms 30 of blower.
- Each tooth 44 may have a main tooth surface 44a, and a bevelled surface 44b.
- the beveled surface 44b is made, for example by machining the upstream axial end of the tooth 44, so that the shape of the bevelled surface 44b is identical to the shape of the inclined surface 36b of the platform 30.
- the disk 40 comprises, on its upstream face 40b, a plurality of axial projections 46, which may have a cubic shape and be arranged circumferentially, at regular intervals, about the axis A.
- the number of axial projections 46 may be equal to the number of teeth 44, each projection 46 being aligned radially with the corresponding tooth 44.
- each axial projection 46 is offset radially inwardly of the disk, that is to say towards the axis A, relative to the corresponding tooth 44.
- a distance between the axis A and a face outer 46a of a projection 46 may be smaller than the distance between the axis A and a groove 42.
- Each axial projection 46 may comprise a fixing orifice 460b on its upstream face 46b, for inserting a fixing means 49, for example a screw or a bolt.
- Each axial projection 46 may also include an insertion hole 460a on its outer face 46a, for inserting a fastener 47, for example an insert, having a threaded hole.
- the fixing of an upstream retention flange 50 can thus be carried out at an axial projection 46, for example by inserting the fixing means 49 through a flange orifice 52 and the orifice 460b fixing the projection, the fixing element 49 then being fixed, for example screwed, to the fastening element 47 inserted by the insertion hole 460a of the projection.
- the retention flange 50 being fixed to the disc 40, an upper surface 54 of the flange 50 then makes it possible to ensure the radial retention of the platform 30.
- FIG. 5 illustrates, for example, a platform 30 whose box 32 has a plunging shape towards the inside of the disc 40, thanks to the beveled surface 44b of the disc 40 and to the inclined surface 36b of the platform 30.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/086,492 US11021973B2 (en) | 2016-03-21 | 2017-03-20 | Blade platform and a fan disk for an aviation turbine engine |
EP17716956.2A EP3433469B1 (fr) | 2016-03-21 | 2017-03-20 | Plateforme, ensemble pour soufflante et soufflante |
CA3018448A CA3018448A1 (fr) | 2016-03-21 | 2017-03-20 | Plateforme, disque et ensemble de soufflante |
RU2018136891A RU2728547C2 (ru) | 2016-03-21 | 2017-03-20 | Платформа лопасти и диск вентилятора для авиационного турбинного двигателя |
BR112018069179-8A BR112018069179B1 (pt) | 2016-03-21 | 2017-03-20 | Plataforma apta a ser interposta entre duas pás adjacentes de um ventilador, conjunto, e, ventilador de turbomáquina |
CN201780019114.2A CN108884720B (zh) | 2016-03-21 | 2017-03-20 | 航空涡轮发动机的叶片平台和风扇盘 |
JP2018549497A JP7164435B2 (ja) | 2016-03-21 | 2017-03-20 | 航空機タービンエンジン用の翼台座及びファンディスク |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1652401A FR3048997B1 (fr) | 2016-03-21 | 2016-03-21 | Plateforme d'aube et disque de soufflante de turbomachine aeronautique |
FR1652401 | 2016-03-21 |
Publications (1)
Publication Number | Publication Date |
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WO2017162975A1 true WO2017162975A1 (fr) | 2017-09-28 |
Family
ID=57184524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2017/050649 WO2017162975A1 (fr) | 2016-03-21 | 2017-03-20 | Plateforme, disque et ensemble de soufflante |
Country Status (8)
Country | Link |
---|---|
US (1) | US11021973B2 (fr) |
EP (1) | EP3433469B1 (fr) |
JP (1) | JP7164435B2 (fr) |
CN (1) | CN108884720B (fr) |
CA (1) | CA3018448A1 (fr) |
FR (1) | FR3048997B1 (fr) |
RU (1) | RU2728547C2 (fr) |
WO (1) | WO2017162975A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3089548B1 (fr) * | 2018-12-07 | 2021-03-19 | Safran Aircraft Engines | Soufflante comprenant une plateforme inter-aubes fixee a l’amont par une virole |
FR3120813B1 (fr) | 2021-03-16 | 2024-02-09 | Safran Aircraft Engines | Procédé de fabrication d’un disque de soufflante avec partie en fabrication additive |
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EP2503102A2 (fr) * | 2011-03-25 | 2012-09-26 | Rolls-Royce plc | Rotor doté de plateformes inter-aubes |
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2016
- 2016-03-21 FR FR1652401A patent/FR3048997B1/fr active Active
-
2017
- 2017-03-20 CA CA3018448A patent/CA3018448A1/fr active Pending
- 2017-03-20 RU RU2018136891A patent/RU2728547C2/ru active
- 2017-03-20 US US16/086,492 patent/US11021973B2/en active Active
- 2017-03-20 WO PCT/FR2017/050649 patent/WO2017162975A1/fr active Application Filing
- 2017-03-20 CN CN201780019114.2A patent/CN108884720B/zh active Active
- 2017-03-20 EP EP17716956.2A patent/EP3433469B1/fr active Active
- 2017-03-20 JP JP2018549497A patent/JP7164435B2/ja active Active
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GB2484988A (en) * | 2010-11-01 | 2012-05-02 | Rolls Royce Plc | Annulus filler for gas turbine engine rotor disc |
EP2503102A2 (fr) * | 2011-03-25 | 2012-09-26 | Rolls-Royce plc | Rotor doté de plateformes inter-aubes |
US20160069355A1 (en) * | 2014-09-08 | 2016-03-10 | Rolls-Royce Deutschland Ltd & Co Kg | Panels of a fan of a gas turbine |
Also Published As
Publication number | Publication date |
---|---|
US11021973B2 (en) | 2021-06-01 |
CN108884720A (zh) | 2018-11-23 |
EP3433469B1 (fr) | 2023-04-26 |
EP3433469A1 (fr) | 2019-01-30 |
RU2018136891A3 (fr) | 2020-06-03 |
FR3048997A1 (fr) | 2017-09-22 |
CN108884720B (zh) | 2021-11-02 |
RU2018136891A (ru) | 2020-04-22 |
RU2728547C2 (ru) | 2020-07-30 |
JP7164435B2 (ja) | 2022-11-01 |
FR3048997B1 (fr) | 2020-03-27 |
JP2019512639A (ja) | 2019-05-16 |
CA3018448A1 (fr) | 2017-09-28 |
US20190055847A1 (en) | 2019-02-21 |
BR112018069179A2 (pt) | 2019-01-29 |
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