EP2787175A1 - Système de sécurisation et procédé de sécurisation 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 sécurisation et procédé de sécurisation 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
EP2787175A1
EP2787175A1 EP14162708.3A EP14162708A EP2787175A1 EP 2787175 A1 EP2787175 A1 EP 2787175A1 EP 14162708 A EP14162708 A EP 14162708A EP 2787175 A1 EP2787175 A1 EP 2787175A1
Authority
EP
European Patent Office
Prior art keywords
rotor
holding part
rotor blade
region
holding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14162708.3A
Other languages
German (de)
English (en)
Other versions
EP2787175B1 (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.
  • Such a security system is for example already out of the US 2009/0060746 A1 refer to.
  • a rotor base body For fixing rotor blades on a rotor base body first formed as a so-called Retainerbleche security systems are used in individual mounting areas of the rotor body. Subsequently, the rotor body is bladed by the mounting portions of the rotor blades or rotor blade segments are inserted into the corresponding mounting areas. To secure the rotor blades or rotor blade segments, end portions of the individual security systems are bent over to form a kind of clip around the attachment area.
  • 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 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 To provide rotor body and a rotor with a corresponding security 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 connection areas of the holding part elements can be inserted into the assembly area for producing a clip connection and can be locked together in the assembly 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 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 security system is basically independent from 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 main body. After making the clip connection, the security system continues to ensure a defined flow of force.
  • the connecting region of the first holding part 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 part element for producing 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 substantially independently. Thus, for example, a firm and secure connection of the holding part elements can be ensured with great Ausclipskraft.
  • the clip receiving the second holding part element comprises at least one latching tongue.
  • the insertion kinematics required for clipping or latching of the retaining sub-elements and the associated clipping forces can be set in a particularly simple and precise manner.
  • each latching lug of the first holding part element is associated with a latching tongue of the second holding part element.
  • 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 can be elastically deformed during insertion of the locking lug 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.
  • an insertion bevel for clipping forms the at least one latching lug of the first holding part element
  • 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 latching lug runs 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 assembly 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 securing system can be adapted in a particularly simple manner to mounting regions extending obliquely or non-parallel to a rotational axis of the rotor main body.
  • the connecting regions of the first holding part element and the second holding part element comprise each other corresponding Stops, by means of which a relative movement between the holding part elements can be limited. This is a structurally simple and cost-effective way to limit the relative mobility of the two holding part elements and to define a final assembly position.
  • 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 exemplary 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 an axis of rotation of the rotor as an axial mounting opening in a radially outer edge region of the rotor base 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 arranged below the blade platform 20 and in the present case designed as a blade root mounting portion 22, which is inserted into a relative to a rotational axis of the rotor 10 axially extending mounting portion 24 of the rotor body 12 is.
  • the securing system 16 is arranged radially below the attachment region 22 of the rotor blade 14 in the assembly region 24 and surrounds the attachment region 22 in the manner of a clip, so that the rotor blade 14 is fixed to the rotor body 12 both at the front and at the rear side.
  • 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 the other 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 receptacle 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, the in cooperation with locking edges 44a, 44b of the latching noses 34a, 34b make it impossible for the first holding part element 26a to move out of the clip receptacle 36.
  • 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)
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 true EP2787175A1 (fr) 2014-10-08
EP2787175B1 EP2787175B1 (fr) 2017-05-10

Family

ID=50396983

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1551202B1 (de) * 1965-12-29 1970-10-15 Rolls Royce Loesbare Sicherung fuer die Laufschaufeln einer Stroemungsmaschine
US20110027090A1 (en) * 2009-08-03 2011-02-03 General Electric Company Locking spacer assembly for a circumferential dovetail rotor blade attachment system
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

Family Cites Families (8)

* 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
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
DE102011084153B4 (de) * 2011-10-07 2014-05-15 MTU Aero Engines AG Sicherungsvorrichtung zur Sicherung eines Schaufelelements in einer Nut einer Laufscheibe
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1551202B1 (de) * 1965-12-29 1970-10-15 Rolls Royce Loesbare Sicherung fuer die Laufschaufeln einer Stroemungsmaschine
US20110027090A1 (en) * 2009-08-03 2011-02-03 General Electric Company Locking spacer assembly for a circumferential dovetail rotor blade attachment system
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

Also Published As

Publication number Publication date
US9677403B2 (en) 2017-06-13
EP2787175B1 (fr) 2017-05-10
US20140301854A1 (en) 2014-10-09
DE102013205948B4 (de) 2015-03-12
DE102013205948A1 (de) 2014-10-09
ES2626849T3 (es) 2017-07-26

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