EP2873808B1 - Composé aubes-disques, procédé et turbomachine - Google Patents

Composé aubes-disques, procédé et turbomachine Download PDF

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Publication number
EP2873808B1
EP2873808B1 EP14193324.2A EP14193324A EP2873808B1 EP 2873808 B1 EP2873808 B1 EP 2873808B1 EP 14193324 A EP14193324 A EP 14193324A EP 2873808 B1 EP2873808 B1 EP 2873808B1
Authority
EP
European Patent Office
Prior art keywords
blade
blades
groove
disk group
rotor
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.)
Not-in-force
Application number
EP14193324.2A
Other languages
German (de)
English (en)
Other versions
EP2873808A1 (fr
Inventor
Werner Humhauser
Hermann Klingels
Alexander Klötzer
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.)
MTU Aero Engines AG
Original Assignee
MTU Aero Engines AG
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 MTU Aero Engines AG filed Critical MTU Aero Engines AG
Publication of EP2873808A1 publication Critical patent/EP2873808A1/fr
Application granted granted Critical
Publication of EP2873808B1 publication Critical patent/EP2873808B1/fr
Not-in-force 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
    • F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
    • F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
    • F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
    • 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
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
    • 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
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making
    • Y10T29/49321—Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member

Definitions

  • the invention relates to a blade-disc composite, a method for producing such a blade-disc composite and a turbomachine.
  • An exemplary rotor-disc composite is in DE 10 2005 003 511 A1 shown.
  • the blades are arranged on a radial collar of the disc and engage with a foot portion in a circumferential anchoring groove.
  • the securing of the blades in the radial direction via a positive connection of the blades with the radial collar.
  • a blade-disc assembly in which the blades are disposed on either side of a radially outwardly tapering radial collar.
  • the securing of the blades takes place via securing wires, which are inserted into receiving or insertion grooves extending in the circumferential direction and each having a partial cross-section in the radial collar and in the blade roots.
  • the blade feet with Foot sections engage positively in a circumferential anchoring groove of the radial collar.
  • a blade-disc composite in which the blades engage in a form-fitting manner in a circumferential anchoring groove of the disc.
  • the blades In the radial direction, the blades are secured via the positive connection with the anchoring groove.
  • the blades In the circumferential direction, the blades are secured by longitudinal pins, which are guided in crenellated projections of the groove walls.
  • the two groove walls of the anchoring groove are laterally closed and thus provided without a filling groove for inserting the blades. The insertion of the blades takes place via a tilting movement of the blades in the axial direction of the blade-disc composite.
  • US 2010 296936 A1 shows a mounting system for circumferentially insertable blades, so that the loads on the Schaufelfußseinschnürung be as low as possible.
  • a blade root section abuts directly on a groove bottom.
  • Herauskipptechnischsetti shown that space the blades at rest from the groove bottom in the idle state.
  • EP 2 320 030 A1 shows a blade with a foot portion which is inserted into an anchoring groove of a rotor disk. An additional volume can be arranged on the foot area. Introducing a spring is mentioned, which fixes the blade during assembly in the radial direction. It is therefore in the spring neither a backup, and certainly not an anti-tipping or locking element.
  • the object of the invention is to provide a blade-disc composite comprising an alternative blade guard and easy to assemble and disassemble. Furthermore, it is an object of the invention to provide a method for assembling such a blade-disc composite and a turbomachine.
  • An inventive blade-disk assembly of a turbomachine has a plurality of juxtaposed blades and a sealing blade, which are used with foot sections in a circumferential anchorage of a rotor disk and interact positively with bearing portions of a front wall and a rear wall in the radial direction.
  • the blade-disc composite according to the invention has at least one circumferential securing element, which cooperates positively with at least one of the blades and a plurality of Herausklippommen, which are arranged between the groove bottom and the foot sections and space in the resting state, the blades in top position of the groove bottom.
  • Top layer means that the blades are located at an upper area of the blade-disc assembly, with the horizontal orientation of the turbomachine being the area above the horizontal plane In support, that is to say when positioned in a lower region of the blade-disk assembly, the blades are automatically brought into abutment with the bearing sections by gravity at rest During operation of the turbomachine, the blades are pressed against the bearing sections due to the centrifugal force acting on them and are therefore also secured against tipping out nd the high centrifugal forces essentially also the circumferential securing elements do not fulfill a primary safety function during operation. This is exclusively about the Bearings of the groove walls provided. This allows the blades and the shutter blade to assume an optimal operating position.
  • the bearing sections may be due to the tipping of the blades free of recesses for inserting the blades.
  • the blades in the axial direction ie about its transverse axis, clipped.
  • the invention makes it possible to secure the blades of a blade-disc composite in the axial direction and in the circumferential direction positively and non-positively.
  • the type of structural design significantly reduces life-time minimizing properties of the disc geometry. At the same time can be used due to the nature of the structural design on cost and after maintenance intervals partly reusable security elements.
  • the advantage of the blade-disc composite according to the invention consists in particular in dispensing with life-limiting filling grooves for the blades and for the securing elements, and in the use of low-loaded securing elements. In operation, the fuse elements are applied to a large area of the adjacent components. As a result, there are hardly any edge loads or point loads and thus no stress peaks in the material.
  • the type of construction ensures a simple, fast and reproducible assembly and disassembly or securing and end securing of the blades, since little or no plastic deformation of the securing elements is necessary.
  • the at least one circumferential securing element is an elongated body which is inserted into two mutually aligned receptacles of the walls, wherein the at least one blade has an axial recess for receiving the circumferential securing element.
  • the recordings are easy to form and prevent a weakening of the groove walls when positioned in the bearing sections.
  • the receptacles are designed as slots which are open in the radial direction
  • the at least one circumferential securing element can be inserted radially from outside to inside. They can identify such widths or radii that the at least one circumferential securing element is not inserted radially, but can be screwed. The rotation then preferably extends in the radial direction.
  • the at least one circumferential securing element is a wall portion of the one wall and the at least one blade has a corresponding platform-side axial demotion for cooperation with the wall portion.
  • the at least one circumferential securing element is formed as an integral portion of the disc, which further simplifies and shortens the assembly of the blade due to the removal of assembly steps.
  • the Ausschkippairesetti are preferably deformed sheet metal body, which are supported with their support legs or legs on the groove base.
  • Such sheet metal bodies are easy to manufacture and adapt.
  • they are U-shaped or M-shaped metal profiles. The profile shape depends on the blade roots and in particular on their undersides, with which the blades rest in the rest state on the sheet metal body.
  • At least some blades may have an abutment portion, on each of which a Ausschkippommeselement abuts the side.
  • the blade-disc composite has a.
  • Closing element which is arranged in sections between the groove base and the foot sections and spaced in the rest state, the shutter blade in the top layer of the groove bottom. The closing blade is thus held almost like the other blades in the anchoring groove.
  • the closure element is guided in a bore of the closure vane and dives in between two adjacent anti-tip-over elements. Due to the formation of the bore in the closure blade no additional locking body are necessary.
  • the bore is preferably oriented in the radial direction in such a way that it is guided past the blade with its longitudinal axis. As a result, the closing element is freely accessible.
  • the closing element is a screw, which is provided with a rotation lock.
  • the screw allows precise adjustment and in particular eliminates plastic deformation.
  • the screw allows a non-destructive disassembly and is thus reusable. The anti-rotation prevents unintentional twisting of the screw.
  • the closure element may have a head which is thickened with respect to its shaft guided in the bore and which is arranged between two anti-tilting elements,
  • the closure member has a tipping prevention element-like body with a plastically deformable tab which engages in a recess of the closure vane.
  • the tab allows easy and effective locking.
  • the shutter blade is to be provided only with a foot-side recesses. The formation of a closure blade passing through hole and in particular an internal threaded hole is eliminated.
  • this closing element is simplified when the main body has a plurality of tool holders which are arranged side by side in the circumferential direction of the blade-disc composite. As a result, the closing element-side tab and the closure-blade-side recess can be aligned exactly with one another.
  • a rotor disk is provided with a peripheral anchoring groove which is delimited by two walls, wherein the walls have two opposite bearing sections. Then, the blades are tipped into the anchoring groove, wherein the blades dive with their foot sections under the bearing sections and a blade inserted first is positively brought into engagement with a circumferential securing element. Subsequently, the blades are lifted individually or in groups by the insertion of Ausklipp instrumentss instituten under their foot sections or spaced from the groove base. Finally, a closing blade is tipped into the anchoring groove and preferably activates a closing element cooperating with the closing blade. The method enables a simple, fast and reproducible assembly and disassembly or securing and end securing of the blades.
  • the closing element is a screw element and is screwed in so far that it is spaced from the groove base when the blades on the bearing sections.
  • the closing element and the groove base are prevented during operation, so that negative phenomena such as a material abrasion or "fretting" between the closing element and the groove bottom are prevented.
  • a turbomachine according to the invention such as a gas turbine and in particular an aircraft engine, has at least one blade-disk assembly according to the invention.
  • the blade-disc composite can be arranged on the compressor side and / or on the turbine side.
  • Such a turbomachine is characterized by a heavy-duty rotor.
  • a first exemplary embodiment of a blade-disc composite 1 according to the invention of a turbomachine has a row of blades 2 and a rotor disk 4.
  • the turbomachine is flowed through from left to right in the direction of its machine longitudinal axis, ie in the axial direction, by a hot gas.
  • the hot gas occurs vertically in the plane of the drawing.
  • the turbomachine is, for example, a gas turbine and in particular an aircraft engine.
  • the blade-disc composite 1 forms part of a rotor that rotates about the machine longitudinal axis.
  • the rotor is a turbine rotor in the illustrated embodiment, but may also be a compressor rotor.
  • the blade row 2 consists of a plurality of in the circumferential direction of the blade-disc composite 1 juxtaposed blades 6, 8, 10, 11.
  • the blades 6, 8, 10, 11 are respectively with her foot or foot section 12 and her neck or Neck portion 14 received in a circumferential anchoring groove 16 of the rotor disk 4.
  • the anchoring groove 16 has a front wall 18 viewed in the flow direction and a rear wall 20 which are connected to one another via a groove base 22.
  • the walls 18, 20 have two opposite annular beads or bearing sections 24, 26, to which the blades 6, 8, 10, 11 with their widened compared to their necks 14 feet 12 in Operation of the turbomachine in the radial direction.
  • the groove bottom 22 is not employed in the illustrated embodiment in the axial direction.
  • the blades 6, 8, 10, 11 extend upstream with a front platform portion 28 over the front wall 18 and terminate flush with a radially extending end face 30 of the front wall 18. At rest, the blades 6, 8, 10, 11 lie with their front platform portion 28 each on a peripheral surface 32 of the front wall 18 and are spaced in operation over a small radial gap thereof. Since the front wall 18 is formed in the circumferential direction with a uniform height, all the blades 6, 8, 10, 11 have the same front platform section 28.
  • the blades 6, 8, 10, 11 extend with a downstream deck portion 36 over the rear wall 20. Due to the smaller height of the rear wall 20 compared to the front wall 18, the blades are. 6, 8, 10, 11 at rest with their rear platform sections 36 each spaced from the rear wall 20 in the radial direction. In order to prevent accidental tipping out of the blades 6, 8, 10 in the upper position in the resting state, between the groove bottom 22 and the feet 12 of the blades 6, 8, 10 Ausschkipp Klischiere 38 are arranged.
  • the blade designated by the reference numeral 11 is a so-called shutter blade, which is inserted last into the anchoring groove 16 and by means of which the blade row 2 is closed. This does not cooperate with a Ausschiltippschselement 38, but has an alternative Ausklipp musicianssmechanismus, which will be explained below.
  • the blades 6, 8, 10 are spaced by means of the Ausschkipp Klinace 38 at rest in the upper layer shown by the groove bottom 22 and thus raised in the direction of the bearing portions 24, 26.
  • the blades 6,8,10 are thus positioned with their feet 12 near the bearing portions 24, 26 and away from the groove base 22, whereby they can not tilt out of the anchoring groove 16 and can be tipped out.
  • the Ausklippomme 38 have a profile with a front support leg 40, a rear support leg 42 and extending between the support legs 40, 42 support portion 44.
  • the Ausklipp Klisch Anlagennite 38 are, for example, a multi-curved sheet metal body and have resilient properties.
  • the tip-out protection elements 38 are supported on the groove base 22 with their support legs 40, 42.
  • the blades 6, 8, 10 rest with their bottom surfaces 46 on the support portions 44 and are thereby brought with their noiroberon 48, 50 almost in contact with the bearing portions 24, 26.
  • slight radial movements of the rotor blades 6, 8, 10 are made possible.
  • the shape of the support portions 44 is selected corresponding to the foot bases 46.
  • the tilt-out securing elements 38 are in particular M-shaped profiles.
  • the anti-tip out elements 38 have a U-shaped profile (see third embodiment in FIG. 12 ).
  • each blade 6, 8, 10 may be associated with a Ausschkipp Anlagenselement 38.
  • a Ausschkipp Anlagenselement 38 a plurality of blades 6, 8, 10 associated.
  • the moving blades 6, 8, 10 and the closing blade 11 each have an abutment section 52 extending in the axial direction.
  • the abutment section 52 forms a lateral shoulder surface for the anti-tilt locking elements 38, so that, as in FIG. 2 represented in the assembled state, the Ausschkipptechnischsetti 38 on both sides in abutment with the respective adjacent abutment sections 52, 54 are.
  • the blade-disc composite 1 for circumferential securing of the blades 6, 8, 10 and the closure blade 11 at least one Circumferential securing element 56.
  • the circumferential securing element 56 is, for example, a rectangular body with a flat bearing surface 57 and a rounded head surface 58. It forms with at least one of the moving blades 6, 8, 10 a positive connection, which for receiving the circumferential securing element 56 has a longitudinally extending recess 59 with a Having the outer contour corresponding convex inner surface.
  • a plurality of circumferential securing elements 56 may be provided.
  • each blade 6, 8, 10 may be associated with a circumferential securing element 56.
  • the circumferential securing element 56 is inserted endwise into two mutually aligned wall-side receivers 60 and is supported in the installed state on a tilt-out securing element 38 with its bearing surface 57.
  • the receptacles 60 are here axial downgradings of the opposite bearing sections 24, 26.
  • the receptacles 60 are formed in the region of the bearing sections 24, 26 and enforce them in the radial direction, so that on the one hand the walls 18, 20 are not weakened and on the other Circumferential securing element 56 can be used radially from outside to inside.
  • the closing blade 11 for locking the blade row 2 cooperates with a closing element 62, which at the same time acts as a tilt-out securing mechanism and secures the closing blade 11 against tipping out in the upper layer shown.
  • the closing element 62 is designed as a screw element with a threaded shank 64 and a head 66 widened with respect to the threaded shank 64. It is guided in an internally threaded bore 68 of the closure blade 11, which passes through the platform, neck 14 and foot 12 in the radial direction. To avoid a collision of the closing element 62 with its blade 69, the internally threaded bore 68 is set in the circumferential direction.
  • the closing element 62 protrudes with its head 66 on the foot side out of the closing shroud 11 and emerges between two adjacent anti-tip securing elements 38.
  • this has a foot-side recess 70 for at least partially receiving the head 66 during insertion.
  • this has an external tool holder 72, which is formed in the embodiment shown here as a hexagon socket.
  • the closing element 62 or the Threaded shaft 64 sunk in the locked state relative to a platform surface 74.
  • a rotation lock not shown, is provided, by means of which an unintentional rotational movement of the closing element 62 and thus an adjustment of the closing element 62 is prevented.
  • the at least one circumferential securing element 56 is first arranged by radial insertion into the receptacles 60 in the rotor disc 4. Thereafter, the bucket 6 is tipped over the circumferential securing element 56 in the anchoring groove 16. The tipping takes place via the rear wall 20 in the axial direction forward. The blade 6 is immersed with its foot 12 under the rear bearing portion 26 and then ribbed forward. In this case, it is engaged with the resting on the groove base 22 circumferential securing element 56 in such a way that this at least partially immersed in the recess 59.
  • the head 66 of the closing element 62 is at least partially in the recess 70.
  • the closing element 62 is extended by a rotary movement into its locking position. It is based with its head 66 on the groove bottom 22 between the adjacent Ausschkipp Anlagenn 38 and thereby lifts the shutter blade 11 at.
  • the locking position is reached as soon as the closing blade 11 is secured in the idle state against tipping out.
  • the closing element 62 is preferably driven up only so far that it is spaced from the groove bottom 22 with its head 66 during operation.
  • the closing blade 11 is thus not clamped by means of the closing element 62 between the groove base 22 and the bearing portions 24, 26. At rest, slight radial movements are possible.
  • the shutter blade 11 can be an optimum operating position taking.
  • a material abrasion between the head 66 and the groove bottom 22 is prevented.
  • FIGS. 8 . 9, 10 and 11 a second embodiment of the blade-disc composite 1 according to the invention is shown. Essentially difference from the first embodiment according to the FIGS. 1 to 7 shows the second embodiment of the FIGS. 8 to 11 an alternative closure element 62 and an alternative closure vane 11 cooperating with this closure element 62.
  • the closing element 62 has a tilting element-like basic body. It therefore essentially has a profile like the above-described and also used in this embodiment Ausklipp Klischomme 38. It is preferably a multi-curved sheet metal body with resilient properties, due to the mutually employed partial surfaces of the undersides 46 of the shutter blade 11 and the at least to the shutter blade 11 adjacent blades 8, 10 here is M-shaped. It has a front support leg 76 and a rear support leg 78 and a support leg 76, 78 interconnecting support portion 80 which is formed corresponding to the bottom legs 46.
  • the closing element 62 has a width or extent in the circumferential direction which corresponds approximately to twice the foot width of the rotor blades 8, 10 and the closing blade 11. The blades 8, 10 and the shutter blades have the same foot width. Thus, the shutter blade 11 is fully lifted in its upper surface shown by the closure member 62.
  • the adjacent blades 8, 10 each lie in half on the closing element 62.
  • the closure member 62 To cooperate with the sealing blade 11 as the closure member 62 has a centrally disposed tab 82, which is transferred via a plastic deformation of a release position a in a locking position b.
  • the tab 82 is an integral portion of the support portion 80 and disposed in the release position a in an opening 84. As a result, the tab 82 is flush with the support portion 80 in the release position a, which simplifies the assembly of the shutter blade 11 and the adjacent blades 8, 10. In particular, the tab 82 traces the course of the contact section 80.
  • the closure blade 11 For receiving the tab 82, the closure blade 11 has a correspondingly formed foot-side locking recess 86.
  • the locking recess 86 is viewed in the transverse direction of the blade, ie in the mounted state in the circumferential direction, centrally and introduced from behind into the foot 12. It passes through the foot bottom 46 and the rear foot top 50. It has an axially engaged locking surface 88 which forms a stop for the bent-up tab 82 and thus defines the locking position b.
  • the width of the locking recess 86 corresponds approximately to the tab width 82 or the locking recess 86 is slightly wider than the tab 82 for ease of assembly.
  • a plurality of tool holders 90, 92 are formed in the base body 64, which are arranged in the circumferential direction next to each other. For clarity, only two tool holders 90, 92 are numbered.
  • the tool holders 90, 92 are formed identically and serve to attach a corresponding tool. They permit a displacement of the closing element 62 inserted into the anchoring groove 16 in the case of the rotor blades 8, 10 already in use.
  • the closing element 62 is first inserted into the anchoring groove 16 and moved laterally. Thereafter, the blades 8, 10 and the shutter blade 11 are tilted at the free location of the anchoring groove 16 by a movement from back to front and moved to their respective desired position. Then the closing element 62 is exactly aligned and the closing blade 11 is tilted.
  • the tab 82 is bent from its release position a in its locking position b until it dips into the locking recess 86 and is in abutment with the locking surface 88.
  • the blades 8, 10 and the shutter blade 11 are now in the resting state in the upper position shown on the closing element 62 and are secured against tipping out.
  • the Verschtussschaufel 11 is the entire surface on the closing element 62.
  • the blades 8, 10 lie half on the closing element 62.
  • the blades 8, 10 and the closure blade 11 are thus spaced from the groove base 22 and positioned with their effetoberon 44, 46 near the bearing portions 24, 26.
  • the tab engagement in the locking recess 86 in particular prevents the closing blade 11 from tipping out.
  • FIG. 12 a longitudinal section through a third embodiment of the blade-disc composite 1 according to the invention is shown. Essentially different from the previous embodiments, the third embodiment after FIG. 12 an alternative perimeter protection.
  • a shutter blade 11 is similar to the shutter blade according to the first embodiment. Accordingly, the closure blade 11 cooperates with a screw-like closing element 62, which is guided in an internally threaded bore 68 and with its thickened head 66 immersed in the mounted state between two Ausschkipp Klischmaschine 38. In the resting state, the head 66 lies on the groove base 22 in the upper layer and thereby lifts the closing blade 11. In the operating state shown here, the closure blade 11 is pressed with its foot 12 against the bearing portions 24, 26 and the head 66 of the closing element 62 is spaced from the groove bottom 22.
  • Ausklipp Klin 38 For raising the other blades in the top position at rest appropriate Ausklipp acidss institute 38 are provided, which are similar to the Herauskipp Klin 38 stirred up after the previous embodiments. They have in each case two support legs 40, 42 and a support section 44 connecting the support legs 40, 42. Essentially, the support section 44 is designed flat in the tilt-out protection elements 38 used here, and the rear support leg 42 is extended relative to the front support leg 40.
  • the Herauskipptechnischsetti 38 thus have a U-shaped profile.
  • the extension of the second support leg 42 results from the groove base 22 set in the axial direction. In the flow direction, the groove base 22 is set radially from the outside inwards. The difference in length between the support legs 40, 42 now causes the balance of this Height difference or the radial offset, so that the support portion 44 is not employed in the axial direction.
  • the alternative circumferential securing is formed by the fact that at least one moving blade, in this case the closing blade 11, with its front platform section 28 is laterally in contact with a circumferential securing element 56 of the front wall 18 designed as a wall section.
  • the circumferential securing element 56 is formed by a radial cutout 94 in the front wall 18.
  • the closing blade 11 is provided with an axial demotion 96 in the region of its front edge, at least in a corner region.
  • the front wall 18 may have a plurality of such circumferential securing elements 56, so that the front wall 18 is formed quasi-coronary. Alternatively or accordingly, the remaining rotor blades 8, 10, 12 would have a corresponding front platform section 28.
  • the installation eliminates the insertion of the circumferential securing elements 56 in the anchoring groove 16, since the circumferential securing element 56 are formed directly on the front wall 20.
  • a blade-disk assembly of a turbomachine having a plurality of juxtaposed blades and a shutter blade tipped into an anchoring groove with at least one circumferential securing element cooperatively locking with at least one blade, a plurality of anti-tip locking elements interposed between the blade Groove base and the foot sections are arranged and spaced in the resting state, the blades in the top layer of the groove base, and with a closing element which is arranged in sections between the groove bottom and the foot sections and spaced the shutter blade in the top position of the groove bottom at rest, a method for assembling a Such blade-disc composite and a turbomachine.

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

Claims (14)

  1. Ensemble aube-disque (1) d'une turbomachine, comprenant une pluralité d'aubes directrices (6, 8, 10) juxtaposées et une aube de fermeture (11), lesquelles sont insérées au niveau de leurs parties de pied (12) dans une rainure d'ancrage périphérique (16) d'un disque de rotor (4) et coopèrent par complémentarité de formes dans la direction radiale avec des parties de support (24, 26) d'une paroi avant (18) et d'une paroi arrière (20) de la rainure d'ancrage (16), et avec
    - au moins un élément de fixation circonférentiel (56) qui coopère positivement avec au moins l'une des aubes (6, 8, 10, 11), et comprenant en outre
    - au moins un élément de fixation circonférentielle (56) qui coopère par complémentarité de formes avec au moins une des aubes (6, 8, 10, 11), et
    - une pluralité d'éléments anti-déboîtement (38) qui sont disposés entre un fond de rainure (22) et les parties de pied (12) et qui espacent au repos les aubes de rotor (6, 8, 10) en position haute du fond (22) de la rainure.
  2. Ensemble aube-disque selon la revendication 1, dans lequel l'au moins un élément de fixation circonférentielle (56) est un corps allongé qui est inséré au côté extrémité dans deux logements (60), alignés l'un avec l'autre, des parois (18, 20) et l'au moins une aube directrice (6, 8, 10) comporte un évidement axial (59) destiné à recevoir l'élément de fixation circonférentielle (56).
  3. Ensemble aube-disque selon la revendication 1, dans lequel l'au moins un élément de fixation circonférentielle (56) est une partie d'une paroi (18) et au moins une aube (6, 8, 10, 11) comporte un retrait axial côté plate-forme correspondant (96) destiné à coopérer avec la partie de paroi.
  4. Ensemble aube-disque selon la revendication 1, 2 ou 3, dans lequel les éléments anti-déboîtement (38) sont des corps en tôle déformée qui sont en appui au repos, au niveau de leurs branches de support (40, 42), au fond (22) de la rainure.
  5. Ensemble aube-disque selon la revendication 4, dans lequel au moins certaines aubes (6, 8, 10, 11) comportent une partie d'appui sur laquelle l'élément anti-déboîtement (38) est en appui latéralement.
  6. Ensemble aube-disque selon l'une des revendications précédentes, dans lequel un élément de fermeture (62) est prévu qui est disposé par endroits entre le fond (22) de la rainure et les parties de pied (12) et qui espace au repos l'aube de fermeture (11) en position haute du fond (22) de la rainure.
  7. Ensemble aube-disque selon la revendication 6, dans lequel l'élément de fermeture (62) est guidé dans un alésage (68) de l'aube de fermeture (11) et pénètre entre deux éléments anti-déboîtement adjacents (38).
  8. Ensemble aube-disque selon la revendication 7, dans lequel l'élément de fermeture (62) est un élément fileté et comporte une protection anti-rotation.
  9. Ensemble aube-disque selon la revendication 8, dans lequel l'élément de fermeture (62) comporte une tête (66) qui est épaissie par rapport à sa tige (64) guidée dans l'alésage (68) et est disposée entre les éléments anti-déboîtement (38).
  10. Ensemble aube-disque selon la revendication 6, dans lequel l'élément de fermeture (62) comporte un corps de base du type élément anti-déboîtement muni d'une languette (82) déformable plastiquement qui s'engage dans un évidement (70) de l'aube de fermeture (11).
  11. Ensemble aube-disque selon la revendication 10, dans lequel le corps de base comporte une pluralité de porte-outils (90, 92) qui sont disposés côte à côte dans la direction circonférentielle de l'ensemble aube-disque (1).
  12. Procédé de montage d'un ensemble aube-disque (1) selon l'une des revendications précédentes, comprenant les étapes suivantes :
    - la production d'un disque de rotor (4) pourvu d'une rainure d'ancrage périphérique (16) qui est délimitée par deux parois (18, 20), les parois (18, 20) comportant deux partie de support opposées (24, 26),
    - l'emboîtement des aubes directrices (6, 8, 10) dans la rainure d'ancrage (16), les aubes directrices (6, 8, 10) pénétrant au niveau de leur partie de pied (12) sous les parties de support (24, 26) et une des aubes directrices (6, 8, 10) préalablement insérées étant amenée en engagement par complémentarité de forme avec un élément de fixation circonférentielle (56),
    - le soulèvement des aubes directrices (6, 8, 10) individuellement ou en groupes et l'insertion d'un élément anti-déboîtement (38) sous les parties de pied (12) de celles-ci, et
    - l'emboîtement d'une aube de fermeture (11) dans la rainure d'ancrage (16).
  13. Procédé selon la revendication 12, dans lequel l'élément de fermeture (62) est un élément fileté et est vissé jusqu'à être espacé du fond (22) de la rainure lorsque l'aube de fermeture (11) est en appui sur les parties de support (24, 26).
  14. Turbomachine équipée d'un ensemble aube-disque (1) selon l'une des revendications 1 à 11.
EP14193324.2A 2013-11-19 2014-11-14 Composé aubes-disques, procédé et turbomachine Not-in-force EP2873808B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013223583.6A DE102013223583A1 (de) 2013-11-19 2013-11-19 Schaufel-Scheiben-Verbund, Verfahren und Strömungsmaschine

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EP2873808A1 EP2873808A1 (fr) 2015-05-20
EP2873808B1 true EP2873808B1 (fr) 2018-01-17

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Publication number Priority date Publication date Assignee Title
DE102017207445A1 (de) 2017-05-03 2018-11-08 MTU Aero Engines AG Verschleißschutzblech für eine Laufschaufel einer Gasturbine

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Also Published As

Publication number Publication date
US20150139811A1 (en) 2015-05-21
DE102013223583A1 (de) 2015-05-21
EP2873808A1 (fr) 2015-05-20
US10041363B2 (en) 2018-08-07

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