EP2787175B1 - Système de sécurité et procédé de sécurité d'une zone de fixation d'au moins une aube de rotor ou d'un segment d'aube de rotor dans une zone de montage d'un palier de rotor - Google Patents

Système de sécurité et procédé de sécurité d'une zone de fixation d'au moins une aube de rotor ou d'un segment d'aube de rotor dans une zone de montage d'un palier de rotor Download PDF

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Publication number
EP2787175B1
EP2787175B1 EP14162708.3A EP14162708A EP2787175B1 EP 2787175 B1 EP2787175 B1 EP 2787175B1 EP 14162708 A EP14162708 A EP 14162708A EP 2787175 B1 EP2787175 B1 EP 2787175B1
Authority
EP
European Patent Office
Prior art keywords
rotor blade
rotor
retaining part
retaining
mounting area
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
EP14162708.3A
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German (de)
English (en)
Other versions
EP2787175A1 (fr
Inventor
Frank Stiehler
Felix Kern
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 EP2787175A1 publication Critical patent/EP2787175A1/fr
Application granted granted Critical
Publication of EP2787175B1 publication Critical patent/EP2787175B1/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
    • F01D5/02—Blade-carrying members, e.g. rotors
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a securing system and a method for securing a fastening region of at least one rotor blade or a rotor blade segment in a mounting region of a rotor base body.
  • the invention further relates to a rotor with at least one such security system.
  • a security system according to the preamble of claim 1 is known from DE 15 51 202 known.
  • a disadvantage of the known security systems is the fact that in cases where these Retainerbleche be damaged when bent, the entire rotor body has to be de-scooped to replace the defective security system. This leads to significantly increased monthly costs and times.
  • Object of the present invention is to provide a security system of the type mentioned, which allows improved assembly and disassembly. Further objects of the invention are to provide a corresponding method for securing a fastening region of at least one rotor blade or a rotor blade segment in a mounting region of a rotor base body as well as a rotor with a corresponding securing system.
  • a first aspect of the invention relates to a securing system for securing a fastening region of at least one rotor blade or rotor blade segment in a mounting region of a rotor base body.
  • the security system comprises at least a first holding part element and a second holding part element, each comprising a holding portion and a connecting portion.
  • the connecting portions of the holding part elements are insertable for producing a clip connection in the mounting areas and locked together in the mounting area.
  • the holding regions of the holding sub-elements are designed such that they define the attachment region of the at least one rotor blade or the rotor blade segment in the latched state of the connecting regions in the assembly region.
  • a two-part securing system according to the invention is provided, the two holding sub-elements are clipped together to secure the rotor blade or the rotor blade segment on the rotor body in the respective mounting area, the holding portions of the holding part elements are formed in the assembled state of the holding part elements such that without further steps such as bending or the like effect a positional fixation of the relevant rotor blade or the relevant rotor blade segment.
  • a particularly simple, fast and cost-effective installation of the securing system and a correspondingly simple, fast and cost-effective position securing of the rotor blade or the rotor blade segment are made possible. It is for removing or replacing the backup system also sufficient to release the clip connection between the holding part elements.
  • the again separated holding sub-elements can then be easily removed from the mounting area and optionally replaced by new holding sub-elements.
  • a defibration of the entire rotor body is not required in contrast to the prior art, whereby considerable time and cost advantages can be achieved.
  • the safety system is basically independent of the required mounting direction and can be mounted, for example, in the axial or radial direction, from the front or from the back of the rotor body. After making the clip connection, the security system continues to ensure a defined flow of force.
  • the connecting region of the first holding partial element comprises a shaft with at least one protruding latching lug, which can be clipped into a clip receptacle of the connecting region of the second holding partial element in order to produce the clip connection.
  • the first holding part element comprises a shaft with two or more locking lugs. This allows a particularly simple adjustment of Einclips- and Ausclips term that can be adjusted independently of each other substantially. Thus, for example, a firm and secure connection of the holding part elements can be ensured with great Ausclipskraft.
  • the clip receiver of the second holding part element comprises at least one latching tongue.
  • the at least one latching tongue for producing the clip connection is elastically deformable between a rest position and a deflected position and / or forms an insertion bevel for clipping the at least one latching lug of the first holding part element.
  • the latching tongue is elastically deformable between a rest position and a deflected position, the latching tongue during insertion of the locking lug elastic be deformed out of the rest position until the latch has reached its desired final assembly position and the clip connection is made.
  • the latching tongue returns to its rest position after or during the manufacture of the clip connection.
  • the Einsciencekinematik and the Einclips manufacturer can be adjusted particularly simple and precise, so that a correspondingly simple and quick installation is possible.
  • a simplified assembly of a further advantageous embodiment of the invention is achieved in that the at least one locking lug on its side facing away from the holding region has a rounded and / or beveled Ein 1500kontur.
  • a particularly precise adjustment of the necessary for disassembly Ausclipskraft is alternatively or additionally achieved in that the at least one locking lug on its side facing the holding portion comprises a locking edge which includes a predetermined angle with a longitudinal axis of the shaft.
  • the latching edge of the locking lug tapers at a right angle or at an acute angle to the longitudinal axis of the shaft in order to ensure particularly high Ausclips material.
  • the Ausclips be set so high that the clip connection can not be solved without destruction.
  • the connecting region of the second holding part element comprises a receptacle in which the at least one latching lug of the first holding part element is arranged in the latched state of the holding part elements.
  • a particularly precise adaptability to different geometries of the mounting area is achieved in a further embodiment of the invention in that the longitudinal axis of the shaft and / or a main extension axis of the clip receiving a predetermined angle with a main extension axis of the associated holding portion includes.
  • the connecting regions of the first holding part element and the second holding part element comprise mutually corresponding stops, by means of which a relative movement between the holding part elements can be limited.
  • connection areas of the first holding part element and the second holding part element are designed such that they can be clipped only destructive after locking.
  • a mechanically particularly stable securing of the rotor blade or the rotor blade segment and a particularly advantageous force flow are achieved in a further embodiment of the invention in that the holding portion and the connecting portion of the first holding member and / or the second holding member are formed in cross-section substantially L-shaped.
  • a second aspect of the invention relates to a method for securing a fastening region of at least one rotor blade or a rotor blade segment in a mounting region of a rotor main body.
  • the security system After making the clip connection, the security system also ensures a defined flow of force.
  • the securing system is preferably introduced into the mounting area with respect to the axis of rotation of the rotor base body radially below the fastening area of the rotor blade or of the rotor blade segment.
  • a third aspect of the invention relates to a rotor, in particular for a thermal gas turbine, having a rotor main body which comprises at least one mounting region in which a fastening region of at least one rotor blade or a rotor blade segment is fixed.
  • the rotor comprises at least one securing system according to one of the preceding embodiments, by means of which the fastening region of the at least one rotor blade or the rotor blade segment is fixed to the rotor base body.
  • the rotor base body may be formed, for example, as a rotor disk or as a rotor ring. Further resulting features and their advantages can be found in the descriptions of the first and second aspects of the invention, advantageous embodiments of the first and second aspects of the invention being regarded as advantageous embodiments of the third aspect of the invention and vice versa.
  • the mounting area is formed with respect to a rotational axis of the rotor as an axial mounting opening in a radially outer edge region of the rotor main body is. This allows not only a simple assembly and a mechanically particularly stable connection of the rotor blade (s) and the rotor blade segment on the rotor body.
  • Fig. 1 shows a schematic sectional side view of a rotor 10 for a thermal gas turbine, for example for an aircraft engine.
  • Fig. 1 is described below in synopsis with Fig. 2 in which a schematic and partially transparent perspective view of the in Fig. 1 shown rotor 10 is shown.
  • the rotor 10 has a disk-shaped rotor base body 12, to which a rotor blade 14 is fastened by means of a securing system 16 according to the invention.
  • the rotor blade 14 has an airfoil 18, an underlying blade platform 20 and a radially below the blade platform 20 and in the present case designed as a blade root mounting portion 22, which is inserted into a respect to a rotational axis of the rotor 10 axially extending mounting portion 24 of the rotor body 12 is. It can be seen that the securing system 16 radially below the mounting portion 22 of the rotor blade 14 in Mounting region 24 is arranged and the mounting portion 22 clamp-like manner surrounds, so that the rotor blade 14 is fixed to both the front and on the back of the rotor body 12 at this.
  • the securing system 16 consists of a first holding part element 26a, which in Fig. 3 is shown in plan view, and a second holding part element 26 b, the in Fig. 4 is shown in supervision.
  • Each holding part element 26a, 26b has in each case a holding region 28a or 28b and a connecting region 30a or 30b, the connecting regions 30a, 30b of the holding part elements 26a, 26b being introduced from the front and on the other hand from behind into the assembly region 24 for producing a clip connection are latched together in the mounting area 24, so that the holding portions 28a, 28b of the holding part elements 26a, 26b, the mounting portion 22 of the rotor blade 14 (or a rotor blade segment) in the in Fig. 1 and Fig.
  • the holding regions 28a, 28b and the connecting regions 30a, 30b of the first and second holding partial elements 26a, 26b are substantially L-shaped in cross section, so that the holding regions 28a, 28b are at least approximately perpendicular to the connecting regions 30a, 30b.
  • the connecting portion 30a of the first holding part member 26a comprises a shaft 32 with two laterally projecting locking lugs 34a, 34b.
  • the connecting region 30a is clipped into a correspondingly formed clip receptacle 36 of the connecting region 30b of the second retaining part element 26b.
  • Fig. 5 shows for further explanation a schematic perspective view of the securing system 16, wherein the first and the second holding part element 26a, 26b are locked together. How to get in Fig.
  • the clip holder 36 of the second holding part element 26b comprises two locking tongues 38a, 38b, which act as Ein Industriesschrägen and when inserting the locking lugs 34a, 34b in the clip holder 36 from the in Fig. 4 shown rest position elastically deformed outwardly until the locking lugs 34a, 34b their in Fig. 5 reach recognizable Montageendposition in which they are arranged in a corresponding receptacle 40 of the connecting portion 30b.
  • latching lugs 34a, 34b have rounded insertion contours 35a, 35b on their sides facing away from the holding region 28a or their sides facing the clip receptacle 36, thereby facilitating insertion into the clip receptacle 36.
  • the receptacle 40 together with the stops 42a, 42b and the corresponding stops 42c, 42d of the second holding part element 26b, limits the movement of the first holding part element 26a into the clip receiving means 36 of the second holding part element 26b.
  • the locking lugs 34a, 34b spring back into their in Fig. 4 shown rest position and form with their inner end portions stops 42e, 42f, in conjunction with locking edges 44a, 44b of the locking lugs 34a, 34b, a movement of the first holding part element 26a from the clip holder 36 out impossible.
  • the connecting regions 30a, 30b of the first and second holding part elements 26a, 26b are in the present case designed such that they can not be nondestructively nicked after locking.
  • locking edges 44a, 44b close approximately a right angle with a longitudinal axis of the shaft 32 one.
  • the longitudinal or main extension axes of the shaft 32 or of the clip receiver 36 are not perpendicular to the main extension axes of the respective holding regions 28a, 28b, but are slightly angled in order to better correspond to a geometry of the mounting regions 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Connection Of Plates (AREA)

Claims (10)

  1. Système de sécurité (16) pour sécuriser une zone de fixation (22) d'au moins une pale de rotor (14) ou d'un segment de pale de rotor dans une zone de montage (24) d'un corps de base de rotor (12), dans lequel le système de sécurité (16) comprend au moins un premier élément partiel de retenue (26a) et un second élément partie de retenue (26b), qui comprennent respectivement une zone de retenue (28a, 28b) et une zone de jonction (30a, 30b), dans lequel les zones de jonction (30a, 30b) des éléments partiels de retenue (26a, 26b) peuvent être insérés dans la zone de montage (24) pour établir une jonction clipsée et peuvent être enclenchés l'un à l'autre dans la zone de montage (24), dans lequel les zones de retenue (28a, 28b) des éléments partiels de retenue (26a, 26b) sont conçues pour sécuriser la zone de fixation (22) de la au moins une pale de rotor (14) ou du segment de pale de rotor à l'état enclenché des zones de jonction (30a, 30b) dans la zone de montage (24), dans lequel la zone de jonction (30a) du premier élément partiel de retenue (26a) comprend une tige (32) avec au moins un nez d'encliquetage écarté (34a, 34b), qui peut être clipsé, pour établir la jonction clipsée, dans un logement de clipsage (36) de la zone de jonction (30b) du second élément partiel de retenue (26b), dans lequel le logement de clipsage (36) du second élément partiel de retenue (26b) comprend au moins une languette d'encliquetage (38a, 38b) et dans lequel la au moins une languette d'encliquetage (38a, 38b) peut être déformée, pour établir la jonction clipsée, de manière élastique entre une position de repos et une position déployée et/ou forme un biseau d'introduction pour clipser le au moins un nez d'encliquetage (34a, 34b) du premier élément partiel de retenue (26a), caractérisé en ce que les zones de jonction (30a, 30b) des deux éléments partiels de retenue (26a, 26b) pour établir la jonction clipsée peuvent être introduits, d'une part, par l'avant et, d'autre part, par l'arrière dans la zone de montage (24) et peuvent être enclenchés l'une avec l'autre dans la zone de montage (24) de sorte que les zones de retenue (28a, 28b) des éléments partiels de retenue (26a, 26b) sécurisent la position de la zone de fixation (22) de la pale de rotor (14) ou d'un segment de la pale de rotor dans la zone de montage (24).
  2. Système de sécurité (16) selon la revendication 1, caractérisé en ce que le au moins un nez d'encliquetage (34a, 34b) présente, sur son côté opposé à la zone de retenue (28a), un contour d'introduction (35a, 35b) arrondi et/ou biseauté et/ou en ce que le au moins un nez d'encliquetage (34a, 34b) comprend, sur son côté tourné vers la zone de retenue (28a), une arête d'encliquetage (44a, 44b) qui inclut un angle prédéterminé avec un axe longitudinal de la tige (32) et/ou le logement de clipsage (36) s'engage à l'état enclenché dans une contre-dépouille du nez d'encliquetage (34a, 34b).
  3. Système de sécurité (16) selon l'une quelconque des revendications précédentes, caractérisé en ce que la zone de jonction (30a, 30b) du second élément partiel de retenue (26b) comprend un logement (40) dans lequel le au moins un nez d'encliquetage (34a, 34b) du premier élément partiel de retenue (26a) est agencé à l'état enclenché des éléments partiels de retenue (26a, 26b).
  4. Système de sécurité (16) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'axe longitudinal de la tige (32) et/ou un axe d'extension principal du logement de clipsage (36) inclut ou incluent un angle prédéterminé avec un axe d'extension principal de la zone de retenue affectée (28a, 28b).
  5. Système de sécurité (16) selon l'une quelconque des revendications précédentes, caractérisé en ce que les zones de jonction (30a, 30b) du premier élément partiel de retenue (26a) et du second élément partiel de retenue (26b) comprennent des butées (42a-f) qui se correspondent et à l'aide desquelles un mouvement relatif entre les éléments partiels de retenue (26a, 26b) peut être délimité.
  6. Système de sécurité (16) selon l'une quelconque des revendications précédentes, caractérisé en ce que les zones de jonction (30a, 30b) du premier élément partiel de retenue (26a) et du second élément partiel de retenue (26b) sont conçues de sorte qu'elles ne puissent être déclipsées après enclenchement que de manière destructive.
  7. Système de sécurité (16) selon l'une quelconque des revendications précédentes, caractérisé en ce que la zone de retenue (28a, 28b) et la zone de jonction (30a, 30b) du premier élément partiel de retenue (26a) et/ou du second élément partiel de retenue (26b) sont conçues sensiblement en forme de L en coupe transversale.
  8. Procédé de sécurisation d'une zone de fixation (22) au moins d'une pale de rotor (14) ou d'un segment de pale de rotor dans une zone de montage (24) d'un corps de base de rotor (12), caractérisé en ce que l'on utilise un système de sécurité (16) selon l'une quelconque des revendications 1 à 7, dans lequel les zones de jonction (30a, 30b) des éléments partiels de retenue (26a, 26b) du système de sécurité (16) peuvent être insérés par les côtés opposés dans la zone de montage (24) et être enclenchés l'une avec l'autre dans la zone de montage (24) pour établir une jonction clipsée de sorte que les zones de retenue (28a, 28b) des éléments partiels de retenue (26a, 26b) sécurisent la zone de fixation (22) de la au moins une pale de rotor (14) ou du segment de pale de rotor à l'état enclenché des zones de jonction (30a, 30b) dans la zone de montage (24).
  9. Rotor (10), en particulier pour une turbine à gaz thermique, comprenant un corps de base de rotor (12) qui comprend au moins une zone de montage (24), dans laquelle une zone de fixation (22) au moins d'une pale de rotor (16) ou d'un segment de pale de rotor est établie, caractérisé en ce que le rotor (10) comprend au moins un système de sécurité (16) selon l'une quelconque des revendications 1 à 7, au moyen duquel la zone de fixation (22) de la au moins une pale de rotor (14) ou du segment de pale de rotor est établie sur le corps de base (12) du rotor.
  10. Rotor (10) selon la revendication 9, caractérisé en ce que la zone de montage (24) est conçue par rapport à un axe de rotation du rotor (10) sous la forme d'une ouverture de montage axiale (24) dans une zone de bord radialement externe du corps de base (12) du rotor.
EP14162708.3A 2013-04-04 2014-03-31 Système de sécurité et procédé de sécurité d'une zone de fixation d'au moins une aube de rotor ou d'un segment d'aube de rotor dans une zone de montage d'un palier de rotor Not-in-force EP2787175B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013205948.5A DE102013205948B4 (de) 2013-04-04 2013-04-04 Sicherungssystem und Verfahren zur Sicherung eines Befestigungsbereichs wenigstens einer Rotorschaufel oder eines Rotorschaufelsegments in einem Montagebereich eines Rotorgrundkörpers

Publications (2)

Publication Number Publication Date
EP2787175A1 EP2787175A1 (fr) 2014-10-08
EP2787175B1 true EP2787175B1 (fr) 2017-05-10

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EP14162708.3A Not-in-force EP2787175B1 (fr) 2013-04-04 2014-03-31 Système de sécurité et procédé de sécurité d'une zone de fixation d'au moins une aube de rotor ou d'un segment d'aube de rotor dans une zone de montage d'un palier de rotor

Country Status (4)

Country Link
US (1) US9677403B2 (fr)
EP (1) EP2787175B1 (fr)
DE (1) DE102013205948B4 (fr)
ES (1) ES2626849T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3140120A1 (fr) * 2022-09-22 2024-03-29 Safran Aircraft Engines Roue de turbine comprenant un dispositif de retenue axiale de pieds d’aube dans les alvéoles d’un disque

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076634A (en) * 1959-06-12 1963-02-05 Ass Elect Ind Locking means for compressor and turbine blades
US3216699A (en) * 1963-10-24 1965-11-09 Gen Electric Airfoil member assembly
GB1067630A (en) 1965-12-29 1967-05-03 Rolls Royce Bladed rotor for a fluid flow machine
US3653781A (en) * 1970-12-18 1972-04-04 Gen Electric Turbomachinery blade retainer
FR2535794A1 (fr) * 1982-11-08 1984-05-11 Snecma Dispositif de retenue axiale et radiale d'aubes de soufflante
US7625174B2 (en) * 2005-12-16 2009-12-01 General Electric Company Methods and apparatus for assembling gas turbine engine stator assemblies
US20090060746A1 (en) 2007-08-30 2009-03-05 Honeywell International, Inc. Blade retaining clip
US8176598B2 (en) * 2009-08-03 2012-05-15 General Electric Company Locking spacer assembly for a circumferential dovetail rotor blade attachment system
DE102011084153B4 (de) * 2011-10-07 2014-05-15 MTU Aero Engines AG Sicherungsvorrichtung zur Sicherung eines Schaufelelements in einer Nut einer Laufscheibe
EP2696035A1 (fr) * 2012-08-09 2014-02-12 MTU Aero Engines GmbH Dispositif de retenue pour aubes mobiles d'une turbomachine et procédé de montage associé
ES2630046T3 (es) * 2013-04-09 2017-08-17 MTU Aero Engines AG Surtido de chapas de sujeción, turbina de gas correspondiente y método de ensamblaje

Also Published As

Publication number Publication date
US20140301854A1 (en) 2014-10-09
US9677403B2 (en) 2017-06-13
DE102013205948A1 (de) 2014-10-09
DE102013205948B4 (de) 2015-03-12
ES2626849T3 (es) 2017-07-26
EP2787175A1 (fr) 2014-10-08

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