EP2787175B1 - Securing system and method for securing a fixing region of at least one rotor blade or a rotor blade segment in a mounting area of a rotor base body - Google Patents
Securing system and method for securing a fixing region of at least one rotor blade or a rotor blade segment in a mounting area of a rotor base body Download PDFInfo
- 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
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Classifications
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- 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
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- 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
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- 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
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- 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.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Connection Of Plates (AREA)
Description
Die Arbeiten, die zu dieser Erfindung geführt haben, wurden gemäß der Finanzhilfevereinbarung im Zuge des Siebten Rahmenprogramms der Europäischen Union (RP7/2007-2013) gefördert.The work that led to this invention were in accordance with the grant agreement under the Seventh Framework Program of the European Union - funded (FP7 / 2007 2013).
Die Erfindung betrifft ein Sicherungssystem und ein Verfahren zur Sicherung eines Befestigungsbereichs wenigstens einer Rotorschaufel oder eines Rotorschaufelsegments in einem Montagebereich eines Rotorgrundkörpers. Die Erfindung betrifft weiterhin einen Rotor mit wenigstens einem derartigen Sicherungssystem. Ein Sicherungssystem nach dem Oberbegriff von Anspruch 1 ist aus der
Ein weiteres Sicherungssystem ist beispielsweise bereits aus der
Als nachteilig an den bekannten Sicherungssystemen ist der Umstand anzusehen, dass in Fällen, in denen diese Retainerbleche beim Umbiegen beschädigt werden, der gesamte Rotorgrundkörper entschaufelt werden muss, um das defekte Sicherungssystem zu ersetzen. Dies führt zu erheblich erhöhten Monatgekosten und -zeiten.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.
Der Vollständigkeit halber sei zudem auch noch auf die Druckschriften
Aufgabe der vorliegenden Erfindung ist es, ein Sicherungssystem der eingangs genannten Art zu schaffen, welches eine verbesserte Montage und Demontage ermöglicht. Weitere Aufgaben der Erfindung bestehen darin, ein entsprechendes Verfahren zum Sichern eines Befestigungsbereichs wenigstens einer Rotorschaufel oder eines Rotorschaufelsegments in einem Montagebereich eines Rotorgrundkörpers sowie einen Rotor mit einem entsprechenden Sicherungssystem zu schaffen.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.
Die Aufgaben werden erfindungsgemäß durch ein Sicherungssystem mit den Merkmalen des Anspruchs 1, durch ein Verfahren mit den Merkmalen des Anspruchs 8 sowie durch einen Rotor mit den Merkmalen des Anspruchs 9 gelöst. Vorteilhafte Ausgestaltungen mit zweckmäßigen Weiterbildungen der Erfindung sind in den jeweiligen Unteransprüchen angegeben, wobei vorteilhafte Ausgestaltungen des Sicherungssystems als vorteilhafte Ausgestaltungen des Verfahrens bzw. des Rotors und umgekehrt anzusehen sind.The objects are achieved by a security system with the features of claim 1, by a method with the features of claim 8 and by a rotor having the features of claim 9. Advantageous embodiments with expedient developments of the invention are specified in the respective subclaims, wherein advantageous embodiments of the security system are to be regarded as advantageous embodiments of the method and the rotor and vice versa.
Ein erster Aspekt der Erfindung betrifft ein Sicherungssystem zur Sicherung eines Befestigungsbereichs wenigstens einer Rotorschaufel oder eines Rotorschaufelsegments in einem Montagebereich eines Rotorgrundkörpers. Zur verbesserten Montage und Demontage des Sicherungssystems ist es erfindungsgemäß vorgesehen, dass das Sicherungssystem wenigstens ein erstes Halteteilelement und ein zweites Halteteilelement umfasst, die jeweils einen Haltebereich und einen Verbindungsbereich umfassen. Die Verbindungsbereiche der Halteteilelemente sind zur Herstellung einer Clipsverbindung in den Montagebereiche einführbar und im Montagebereich miteinander verrastbar. Die Haltebereiche der Halteteilelemente sind derart ausgebildet, dass sie den Befestigungsbereich der wenigstens einen Rotorschaufel oder des Rotorschaufelsegments im verrasteten Zustand der Verbindungsbereiche im Montagebereich festlegen. Mit anderen Worten ist erfindungsgemäß ein zweiteiliges Sicherungssystem vorgesehen, dessen zwei Halteteilelemente zum Sichern der Rotorschaufel oder des Rotorschaufelsegments am Rotorgrundkörper im jeweiligen Montagebereich miteinander verclipst werden, wobei die Haltebereiche der Halteteilelemente im montierten Zustand der Halteteilelemente derart ausgebildet sind, dass ohne weitere Arbeitsschritte wie beispielsweise Umbiegen oder dergleichen eine Lagefixierung der betreffenden Rotorschaufel bzw. des betreffenden Rotorschaufelsegments bewirken. Hierdurch sind eine besonders einfache, schnelle und kostengünstige Montage des Sicherungssystems sowie eine entsprechend einfache, schnelle und kostengünstige Lagesicherung der Rotorschaufel bzw. des Rotorschaufelsegments ermöglicht. Zum Entfernen oder Austauschen des Sicherungssystems ist es zudem ausreichend, die Clipsverbindung zwischen den Halteteilelementen zu lösen. Die wieder vereinzelten Halteteilelemente können dann einfach aus dem Montagebereich entfernt und gegebenenfalls durch neue Halteteilelemente ersetzt werden. Eine Entschaufelung des gesamten Rotorgrundkörpers ist im Unterschied zum Stand der Technik nicht erforderlich, wodurch erhebliche Zeit- und Kostenvorteile erzielt werden. Das Sicherungssystem ist dabei grundsätzlich unabhängig von der erforderlichen Montagerichtung und kann beispielsweise in axialer oder radialer Richtung, von der Vorderseite oder von der Rückseite des Rotorgrundkörpers aus angebracht werden. Nach dem Herstellen der Clipsverbindung stellt das Sicherungssystem weiterhin einen definierten Kraftfluss sicher.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. For improved assembly and disassembly of the security system, it is provided according to the invention that 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. In other words, 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. As a result, 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.
Erfindungsgemäß ist zudem vorgesehen, dass der Verbindungsbereich des ersten Halteteilelements einen Schaft mit wenigstens einer abstehenden Rastnase umfasst, der zur Herstellung der Clipsverbindung in eine Clipsaufnahme des Verbindungsbereichs des zweiten Halteteilelements einclipsbar ist. Hierdurch ist eine einfache und flexible Möglichkeit zur Herstellung einer Clipsverbindung geschaffen. Durch Variierung der Schaftlänge ist zudem eine einfache Anpassbarkeit des Sicherungssystems an unterschiedliche Rotortypen gegeben. Dabei kann grundsätzlich vorgesehen sein, dass das erste Halteteilelement einen Schaft mit zwei oder mehr Rastnasen umfasst. Dies erlaubt eine besonders einfache Einstellung der Einclips- und Ausclipskräfte, die im Wesentlichen unabhängig voreinander eingestellt werden können. Damit kann beispielsweise eine feste und sichere Verbindung der Halteteilelemente mit großer Ausclipskraft sichergestellt werden.According to the invention, it is additionally provided that 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. As a result, a simple and flexible way to produce a clip connection is created. By varying the shaft length, a simple adaptability of the security system to different rotor types is also given. It can be provided in principle that the first holding part element comprises a shaft with two or more locking lugs. This allows a particularly simple adjustment of Einclips- and Ausclipskräfte 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.
Ferner ist es vorgesehen, dass die Clipsaufnahme des zweiten Halteteilelements wenigstens eine Rastzunge umfasst. Hierdurch können die zum Verclipsen bzw. Verrasten der Halteteilelemente erforderliche Einführkinematik und die damit verbundenen Einclipskräfte besonders einfach und präzise eingestellt werden. Grundsätzlich kann dabei vorgesehen sein, dass jeder Rastnase des ersten Halteteilelements eine Rastzunge des zweiten Halteteilelements zugeordnet ist.Furthermore, it is provided that the clip receiver of the second holding part element comprises at least one latching tongue. As a result, 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. In principle, it can be provided that each latching lug of the first holding part element is associated with a latching tongue of the second holding part element.
Erfindungsgemäß ist es auch vorgesehen, dass die wenigstens eine Rastzunge zum Herstellen der Clipsverbindung elastisch zwischen einer Ruhestellung und einer ausgelenkten Stellung verformbar ist und/oder eine Einführschräge zum Einclipsen der wenigstens einen Rastnase des ersten Halteteilelements bildet. Indem die Rastzunge elastisch zwischen einer Ruhestellung und einer ausgelenkten Stellung verformbar ist, kann die Rastzunge beim Einführen der Rastnase elastischen aus der Ruhestellung heraus verformt werden, bis die Rastnase ihre gewünschte Montageendstellung erreicht hat und die Clipsverbindung hergestellt ist. Vorzugsweise kehrt die Rastzunge nach oder beim Herstellen der Clipsverbindung in ihre Ruheposition zurück. Indem die wenigstens eine Rastzunge eine Einführschräge zum Einclipsen der wenigstens einen Rastnase des ersten Halteteilelements bildet, können die Einführkinematik und die Einclipskräfte besonders einfach und präzise eingestellt werden, so dass eine entsprechend einfache und schnelle Montage ermöglicht ist.According to the invention, it is also provided that 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. By 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. Preferably, the latching tongue returns to its rest position after or during the manufacture of the clip connection. By the at least one latching tongue forms an insertion bevel for clipping the at least one latching lug of the first holding part element, the Einführkinematik and the Einclipskräfte can be adjusted particularly simple and precise, so that a correspondingly simple and quick installation is possible.
Eine vereinfachte Montage wird einer weiteren vorteilhaften Ausgestaltung der Erfindung dadurch erreicht, dass die wenigstens eine Rastnase an ihrer dem Haltebereich abgewandten Seite eine abgerundete und/oder abgeschrägte Einführkontur aufweist. Eine besonders präzise Einstellung der zum Demontieren erforderlichen Ausclipskraft wird alternativ oder zusätzlich dadurch erzielt, dass die wenigstens eine Rastnase an ihrer dem Haltebereich zugewandten Seite eine Rastkante umfasst, die einen vorbestimmten Winkel mit einer Längsachse des Schafts einschließt. Beispielsweise kann vorgesehen sein, dass die Rastkante der Rastnase in einem rechten Winkel oder in einem spitzen Winkel zur Längsachse des Schafts veriäuft, um besonders hohe Ausclipskräfte sicherzustellen. Dabei kann weiterhin vorgesehen sein, dass die Ausclipskräfte so hoch eingestellt werden, dass die Clipsverbindung nicht mehr zerstörungsfrei gelöst werden kann. Umgekehrt können durch Einstellung eines stumpfen Winkels geringere Ausclipskräfte erzielt werden. Eine mechanisch besonders stabile und nicht zerstörungsfrei lösbare Clipsverbindung wird dadurch erzielt, dass die Clipsaufnahme im verrasteten Zustand in einen Hinterschnitt der Rastnase eingreift.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 Einführkontur. 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. For example, it can be provided that 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 Ausclipskräfte. It can further be provided that the Ausclipskräfte be set so high that the clip connection can not be solved without destruction. Conversely, by setting an obtuse angle lower Ausclipskräfte be achieved. A mechanically particularly stable and non-destructive releasable clip connection is achieved in that the clip receptacle engages in the locked state in an undercut of the detent.
Weitere Vorteile ergeben sich, wenn der Verbindungsbereich des zweiten Halteteilelements eine Aufnahme umfasst, in welcher die wenigstens eine Rastnase des ersten Halteteilelements im verrasteten Zustand der Halteteilelemente angeordnet ist. Dies stellt eine konstruktiv einfache Möglichkeit zur Definierung der Montageendposition der Halteteilelemente dar.Further advantages result if 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. This represents a structurally simple way to define the final assembly position of the holding part elements.
Eine besonders präzise Anpassbarkeit an unterschiedliche Geometrien des Montagebereichs wird in weiterer Ausgestaltung der Erfindung dadurch erzielt, dass die Längsachse des Schafts und/oder eine Haupterstreckungsachse der Clipsaufnahme einen vorbestimmten Winkel mit einer Haupterstreckungsachse des zugeordneten Haltebereichs einschließt. Hierdurch kann das Sicherungssystem besonders einfach an schräg bzw. nicht-parallel zu einer Drehachse des Rotorgrundköpers verlaufende Montagebereiche angepasst werden.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. This allows the backup system Particularly easy to be adapted to obliquely or non-parallel to a rotational axis of Rotorgrundköpers extending mounting areas.
In einer weiteren vorteilhaften Ausgestaltung der Erfindung umfassen die Verbindungsbereiche des ersten Halteteilelements und des zweiten Halteteilelements miteinander korrespondierende Anschläge, mittels welchen eine Relativbewegung zwischen den Halteteilelementen begrenzbar ist. Dies stellt eine konstruktiv einfache und kostengünstige Möglichkeit zur Begrenzung der relativen Bewegbarkeit der beiden Halteteilelemente sowie zur Definierung einer Montageendposition dar.In a further advantageous embodiment of the invention, 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. 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.
In einer weiteren vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, dass die Verbindungsbereiche des ersten Halteteilelements und des zweiten Halteteilelements derart ausgebildet sind, dass sie nach dem Verrasten nur zerstörend ausgeclipst werden können. Hierdurch wird eine besonders zuverlässige Sicherung der Rotorschaufel oder des Rotorschaufelsegments erzielt, ohne dass eine Demontage grundsätzlich verunmöglicht wird.In a further advantageous embodiment of the invention, it is provided that the 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. As a result, a particularly reliable backup of the rotor blade or the rotor blade segment is achieved without disassembly is basically impossible.
Eine mechanisch besonders stabile Sicherung der Rotorschaufel oder des Rotorschaufelsegments sowie eine besonders vorteilhafter Kraftfluss werden in weiterer Ausgestaltung der Erfindung dadurch erzielt, dass der Haltebereich und der Verbindungsbereich des ersten Halteteilelements und/oder des zweiten Halteteilelements im Querschnitt im Wesentlichen L-förmig ausgebildet sind.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.
Ein zweiter Aspekt der Erfindung betrifft ein Verfahren zum Sichern eines Befestigungsbereichs wenigstens einer Rotorschaufel oder eines Rotorschaufelsegments in einem Montagebereich eines Rotorgrundkörpers. Erfindungsgemäß ist dabei vorgesehen, dass ein Sicherungssystem nach einem der vorhergehenden Ausführungsbeispiele verwendet wird, wobei die Verbindungsbereiche der Halteteilelemente des Sicherungssystems von gegenüberliegenden Seiten aus in den Montagebereich eingeführt und im Montagebereich miteinander unter Herstellung einer Clipsverbindung verrastet werden, so dass die Haltebereiche der Halteteilelemente den Befestigungsbereich der wenigstens einen Rotorschaufel oder des Rotorschaufelsegments im verrasteten Zustand der Verbindungsbereiche im Montagebereich festlegen. Hierdurch sind eine besonders einfache, schnelle und kostengünstige Montage des Sicherungssystems sowie eine entsprechend einfache, schnelle und kostengünstige Lagesicherung der Rotorschaufel bzw. des Rotorschaufelsegments ermöglicht. Zum Entfemen oder Austauschen des Sicherungssystems ist es ausreichend, die Clipsverbindung zwischen den Halteteilelementen zu lösen. Dabei kann grundsätzlich vorgesehen sein, dass sich die beiden Halteteilelemente zerstörungsfrei oder nur zerstörend wie-der ausgeclipst werden können. Die wieder vereinzelten Halteteilelemente können dann einfach aus dem Montagebereich entfernt und gegebenenfalls durch neue Halteteilelemente ersetzt werden. Eine Entschaufelung des gesamten Rotorgrundkörpers ist im Unterschied zum Stand der Technik nicht erforderlich, wodurch erhebliche Zeit- und Kostenvorteile erzielt werden. Das Sicherungssystem kann dabei grundsätzlich unabhängig von der erforderlichen Montagerichtung verwendet werden. Nach dem Herstellen der Clipsverbindung stellt das Sicherungssystem darüber hinaus einen definierten Kraftfluss sicher. Vorzugsweise wird das Sicherungssystem bezüglich der Drehachse des Rotorgrundkörpers radial unterhalb des Befestigungsbereichs der Rotorschaufel oder des Rotorschaufelsegments in den Montagebereich eingeführt. Weitere sich ergebende Merkmale und deren Vorteile sind den Beschreibungen des ersten Erfindungsaspekts zu entnehmen, wobei vorteilhafte Ausgestaltungen des ersten Erfindungsaspekts als vorteilhafte Ausgestaltungen des zweiten Erfindungsaspekts und umgekehrt anzusehen sind.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. According to the invention, provision is made for a securing system according to one of the preceding embodiments to be used, the connecting regions of the retaining subelements of the security system being introduced from opposite sides into the assembly region and being locked together in the assembly region to produce a clip connection, such that the retaining regions of the retaining subelements enclose the attachment region the at least one rotor blade or the rotor blade segment set in the locked state of the connection areas in the mounting area. As a result, a particularly simple, fast and cost-effective installation of the securing system as well as a correspondingly simple, fast and cost-effective securing of the position of the rotor blade or the rotor blade segment allows. To remove or replace the securing system, it is sufficient to release the clip connection between the holding part elements. It can basically be provided that the two holding sub-elements can be nondestructively or only destructively clipped out. 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 can basically be used regardless of the required mounting direction. 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. Further resulting features and their advantages can be found in the descriptions of the first aspect of the invention, wherein advantageous embodiments of the first aspect of the invention are to be regarded as advantageous embodiments of the second aspect of the invention and vice versa.
Ein dritter Aspekt der Erfindung betrifft einen Rotor, insbesondere für eine thermische Gasturbine, mit einem Rotorgrundkörper, welche wenigstens einen Montagebereich umfasst, in welchem ein Befestigungsbereich wenigstens einer Rotorschaufel oder eines Rotorschaufelsegments festgelegt ist. Erfindungsgemäß ist dabei vorgesehen, dass der Rotor wenigstens ein Sicherungssystem nach einem der vorhergehenden Ausführungsbeispiele umfasst, mittels welchem der Befestigungsbereich der wenigstens einen Rotorschaufel oder des Rotorschaufelsegments am Rotorgrundkörper festgelegt ist. Hierdurch sind eine besonders einfache, schnelle und kostengünstige Montage des Sicherungssystems sowie eine entsprechend einfache, schnelle und kostengünstige Lagesicherung der Rotorschaufel bzw. des Rotorschaufelsegments ermöglicht. Der Rotorgrundkörper kann beispielsweise als Rotorscheibe oder als Rotorring ausgebildet sein. Weitere sich ergebende Merkmale und deren Vorteile sind den Beschreibungen des ersten und des zweiten Erfindungsaspekts zu entnehmen, wobei vorteilhafte Ausgestaltungen des ersten und des zweiten Erfindungsaspekts als vorteilhafte Ausgestaltungen des dritten Erfindungsaspekts und umgekehrt anzusehen sind.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. According to the invention, it is provided that 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. As a result, 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 of the rotor blade segment are made possible. 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.
Weitere Vorteile ergeben sich, indem der Montagebereich bezüglich einer Drehachse des Rotors als axiale Montageöffnung in einem radial äußeren Randbereich des Rotorgrundkörpers ausgebildet ist. Dies erlaubt neben einer einfachen Montage auch eine mechanisch besonders stabile Anbindung der Rotorschaufel(n) bzw. des Rotorschaufelsegments am Rotorgrundkörper.Further advantages result from the fact that 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.
Weitere Merkmale der Erfindung ergeben sich aus den Ansprüchen, dem Ausführungsbeispiel sowie anhand der Zeichnungen. Die vorstehend in der Beschreibung genannten Merkmale und Merkmalskombinationen sowie die nachfolgend in dem Ausführungsbeispiel genannten Merkmale und Merkmalskombinationen sind nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen verwendbar, ohne den Rahmen der Erfindung zu verlassen. Dabei zeigt:
- Fig. 1
- eine schematische seitliche Schnittansicht eines Rotors, an dessen Rotorgrundkörper eine Rotorschaufel mit Hilfe eines erfindungsgemäßen Sicherungssystems befestigt ist;
- Fig. 2
- eine teiltransparente Perspektivansicht des in
Fig. 1 gezeigten Rotors; - Fig. 3
- eine schematische Aufsicht eines ersten Halteteilelements des Sicherungssystems;
- Fig. 4
- eine schematische Aufsicht eines zweiten Halteteilelements des Sicherungssystems; und
- Fig. 5
- eine schematische Perspektivansicht des Sicherungssystems, wobei das erste und das zweite Halteteilelement miteinander verrastet sind.
- Fig. 1
- a schematic sectional side view of a rotor, on whose rotor body a rotor blade by means of a securing system according to the invention is attached;
- Fig. 2
- a semi-transparent perspective view of the in
Fig. 1 shown rotor; - Fig. 3
- a schematic plan view of a first holding part element of the security system;
- Fig. 4
- a schematic plan view of a second holding part element of the security system; and
- Fig. 5
- a schematic perspective view of the securing system, wherein the first and the second holding part element are locked together.
Das Sicherungssystem 16 besteht aus einem ersten Halteteilelement 26a, das in
Wie in
Die Aufnahme 40 begrenzt zusammen mit den Anschlägen 42a, 42b und den korrespondierenden Anschlägen 42c, 42d des zweiten Halteteilelements 26b die Bewegung des ersten Halteteilelements 26a in die Clipsaufhahme 36 des zweiten Halteteilelements 26b hinein. In der in
Wie man in
Die in den Unterlagen angegebenen Parameterwerte zur Definition von Prozess- und Messbedingungen für die Charakterisierung von spezifischen Eigenschaften des Erfindungsgegenstands sind auch im Rahmen von Abweichungen - beispielsweise aufgrund von Messfehlem, Systemfehlern, Einwaagefehlem, DIN-Toleranzen und dergleichen - als vom Rahmen der Erfindung mitumfasst anzusehen.The parameter values given in the documents for the definition of process and measurement conditions for the characterization of specific properties of the subject invention are also to be regarded as within the scope of deviations - for example due to measurement errors, system errors, Einwaagefehlem, DIN tolerances and the like - as included in the scope of the invention ,
Claims (10)
- A securing system (16) for securing a fixing region (22) of at least one rotor blade (14) or rotor blade segment in a mounting area (24) of a rotor base body (12), wherein the securing system (16) comprises at least one first retaining part element (26a) and one second retaining part element (26b), each of which comprises a retaining area (28a, 28b) and a connecting area (30a, 30b), wherein the connecting areas (30a, 30b) of the retaining part elements (26a, 26b) can be inserted into the mounting area (24) and interlocked in the mounting area (24) in order to produce a clip connection, wherein the retaining areas (28a, 28b) of the retaining part elements (26a, 26b) are designed to establish the fixing region (22) of the at least one rotor blade (14) or rotor blade segment in the locked state of the connecting areas (30a, 30b) in the mounting area (24), wherein the connecting area (30a) of the first retaining part element (26a) comprises a shaft (32) with at least one projecting detent lug (34a, 34b) that can be clipped into a clip receptacle (36) of the connecting area (30b) of the second retaining part element (26b) in order to establish the clip connection, wherein the clip receptacle (36) of the second retaining part element (26b) comprises at least one latching tongue (38a, 38b), and wherein the at least one latching tongue (38a, 38b), in order to establish the clip connection, can be deformed elastically between a neutral position and a deflected position and/or forms an insertion chamfer for clipping-in the at least one detent lug (34a, 34b) of the first retaining part element (26a), characterized in that the connecting areas (30a, 30b) of both retaining part elements (26a, 26b), in order to establish the clip connection, can be inserted into the mounting area (24) from the front on the one hand and from the rear on the other and interlocked in the mounting area (24), so that the retaining areas (28a, 28b) of the retaining part elements (26a, 26b) positionally secure the fixing region (22) of the rotor blade (14) or of a rotor blade segment in the mounting area (24).
- The securing system (16) as set forth in claim 1, characterized in that the at least one detent lug (34a, 34b) has on its side facing away from the retaining area (28a) a rounded and/or chamfered insertion contour (35a, 35b) and/or that the at least one detent lug (34a, 34b) comprises on its side facing toward the retaining area (28a) a detent edge (44a, 44b) that forms a predetermined angle with a longitudinal axis of the shaft (32) and/or that the clip receptacle (36) engages in an undercut of the detent lug (34a, 34b) in the locked state.
- The securing system (16) as set forth in any one of the preceding claims, characterized in that the connecting area (30a, 30b) of the second retaining part element (26b) comprises a receptacle (40) in which the at least one detent lug (34a, 34b) of the first retaining part element (26a) is arranged in the locked state of the retaining part elements (26a, 26b).
- The securing system (16) as set forth in any one of the preceding claims, characterized in that the longitudinal axis of the shaft (32) and/or a main axis of extension of the clip receptacle (36) forms a predetermined angle with a main axis of extension of the associated retaining area (28a, 28b).
- The securing system (16) as set forth in any one of the preceding claims, characterized in that the connecting areas (30a, 30b) of the first retaining part element (26a) and of the second retaining part element (26b) comprise mutually corresponding stops (42a-f) by means of which a relative movement between the retaining part elements (26a, 26b) can be limited.
- The securing system (16) as set forth in any one of the preceding claims, characterized in that the connecting areas (30a, 30b) of the first retaining part element (26a) and of the second retaining part element (26b) are embodied such that, after they are interlocked, they can be unclipped only destructively.
- The securing system (16) as set forth in any one of the preceding claims. characterized in that the retaining area (28a, 28b) and the connecting area (30a, 30b) of the first retaining part element (26a) and/or of the second retaining part element (26b) have a substantially L-shaped cross section.
- A method for securing a fixing region (22) of at least one rotor blade (14) or rotor blade segment in a mounting area (24) of a rotor base body (12), characterized in that a securing system (16) as set forth in any one of claims 1 to 7 is used, wherein the connecting areas (30a, 30b) of the retaining part elements (26a, 26b) of the securing system (16) are inserted from opposite sides into the mounting area (24) and interlocked in the mounting area (24) to establish a clip connection, whereby the retaining areas (28a, 28b) of the retaining part elements (26a, 26b) establish the fixing region (22) of the at least one rotor blade (14) or rotor blade segment in the locked state of the connecting areas (30a, 30b) in the mounting area (24).
- A rotor (10), particularly for a thermal gas turbine, with a rotor base body (12) that comprises at least one mounting area (24) in which a fixing region (22) of at least one rotor blade (16) or rotor blade segment is established, characterized in that the rotor (10) comprises at least one securing system (16) as set forth in any one of claims 1 to 7 by means of which the fixing region (22) of the at least one rotor blade (14) or rotor blade segment is established on the rotor base body (12).
- The rotor (10) as set forth in claim 9, characterized in that the mounting area (24) is embodied with respect to an axis of rotation of the rotor (10) as an axial mounting opening (24) in a radially outside edge region of the rotor base body (12).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013205948.5A DE102013205948B4 (en) | 2013-04-04 | 2013-04-04 | Safety system and method for securing a mounting area of at least one rotor blade or a rotor blade segment in a mounting region of a rotor base body |
Publications (2)
Publication Number | Publication Date |
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EP2787175A1 EP2787175A1 (en) | 2014-10-08 |
EP2787175B1 true EP2787175B1 (en) | 2017-05-10 |
Family
ID=50396983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP14162708.3A Not-in-force EP2787175B1 (en) | 2013-04-04 | 2014-03-31 | Securing system and method for securing a fixing region of at least one rotor blade or a rotor blade segment in a mounting area of a rotor base body |
Country Status (4)
Country | Link |
---|---|
US (1) | US9677403B2 (en) |
EP (1) | EP2787175B1 (en) |
DE (1) | DE102013205948B4 (en) |
ES (1) | ES2626849T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114458391A (en) * | 2022-02-22 | 2022-05-10 | 中国联合重型燃气轮机技术有限公司 | Turbine blade locking assembly |
FR3140120A1 (en) * | 2022-09-22 | 2024-03-29 | Safran Aircraft Engines | TURBINE WHEEL INCLUDING AN AXIAL RETAINING DEVICE FOR BLADE FOOT IN THE SLOTS OF A DISC |
Family Cites Families (11)
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 (en) * | 1982-11-08 | 1984-05-11 | Snecma | AXIAL AND RADIAL BLADE SUPPORT DEVICE |
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 (en) * | 2011-10-07 | 2014-05-15 | MTU Aero Engines AG | Securing device for securing a blade element in a groove of a running disk |
EP2696035A1 (en) * | 2012-08-09 | 2014-02-12 | MTU Aero Engines GmbH | Retention device for rotor blades of a fluid flow engine and corresponding assembly process |
ES2630046T3 (en) * | 2013-04-09 | 2017-08-17 | MTU Aero Engines AG | Assortment of clamping plates, corresponding gas turbine and assembly method |
-
2013
- 2013-04-04 DE DE102013205948.5A patent/DE102013205948B4/en not_active Expired - Fee Related
-
2014
- 2014-03-31 ES ES14162708.3T patent/ES2626849T3/en active Active
- 2014-03-31 EP EP14162708.3A patent/EP2787175B1/en not_active Not-in-force
- 2014-04-04 US US14/245,686 patent/US9677403B2/en not_active Expired - Fee Related
Also Published As
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DE102013205948A1 (en) | 2014-10-09 |
DE102013205948B4 (en) | 2015-03-12 |
US20140301854A1 (en) | 2014-10-09 |
EP2787175A1 (en) | 2014-10-08 |
US9677403B2 (en) | 2017-06-13 |
ES2626849T3 (en) | 2017-07-26 |
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