EP0699824B1 - Device for locking rotor blades and eliminating rotor imbalance in compressors or turbines of gas turbine engines - Google Patents

Device for locking rotor blades and eliminating rotor imbalance in compressors or turbines of gas turbine engines Download PDF

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Publication number
EP0699824B1
EP0699824B1 EP95112351A EP95112351A EP0699824B1 EP 0699824 B1 EP0699824 B1 EP 0699824B1 EP 95112351 A EP95112351 A EP 95112351A EP 95112351 A EP95112351 A EP 95112351A EP 0699824 B1 EP0699824 B1 EP 0699824B1
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EP
European Patent Office
Prior art keywords
axial
shaped
retaining element
wedge
blade
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.)
Expired - Lifetime
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EP95112351A
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German (de)
French (fr)
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EP0699824A1 (en
Inventor
Günter Schmidt
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MTU Aero Engines GmbH
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MTU Motoren und Turbinen Union Muenchen GmbH
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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
    • 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
    • F01D5/027—Arrangements for balancing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/662—Balancing of rotors

Definitions

  • the invention relates to a device for blade fixing and to eliminate rotor imbalances in case of axial flow Compressors or turbines of gas turbine engines according to the generic term of claim 1.
  • a device is from DE-PS 4,300,773 known.
  • the known case deals with the simultaneous one axial securing of the blades and filler pieces a locking plate, the filler pieces radially below the Lock washer in the axial gap between the foot end and groove base axially are set.
  • a filler is required for each axial groove, where appropriate, one or more filler pieces if necessary in one Filler piece exchangeable with a specifically balanced balancing mass are.
  • Rivet locks already proposed for the rotor blades on the impeller are also affected by the aforementioned problem. They have furthermore the disadvantage of a high assembly and disassembly effort. In addition there is a risk of local damage to the blade feet and the Wheel disc, especially when loosening the rivet. Such are also Riveting often with structural changes in particular linked to the wheel disc or on the axial grooves, which in turn causes problems with regard to the component strength of the wheel disc, which is extremely heavily loaded on the radially outer circumference.
  • the invention has for its object a device according to the Specify the above-mentioned and known type that when assembled Bucket ensures that the blades fit practically without play on the wheel disc with a simple and easy-to-install design and at the same time the simplest possible removal of disc or. Rotor unbalance enabled.
  • the task is with the characteristics of the labeling part of claim 1 according to the invention.
  • each blade is free of play with its foot-side contact or support surfaces against corresponding support surfaces the axial groove in the wheel rim of the wheel disc concerned. All blades are practically in one uniform static support and installation condition, so that a possibly unbalance or residual unbalance still present on the disc is clearly definable and compensable. If there is a disc imbalance is available, the relevant weight-specifically matched Balancing mass reliable against the fuse element in of the relevant recess on the blade root. By comparison simple assembly and disassembly options are the Blades and the securing element in the axial direction on the Wheel disc secured.
  • the radial gap height can at least in the direction of a wheel rim or. Be so large that the balancing mass initially over the a larger lateral gap opening into the recess can be used on the blade root and the securing element is wedged thereon becomes.
  • the wedge-like jamming can at least in the sense the features of claim 2 or 3 are performed.
  • An intense one and along the blade root as large and uniform as possible Surface pressure can be achieved in particular according to claim 4, after which the axial gap and the securing element with respect to the axially changing gap height course essentially wedge-shaped on each other are coordinated.
  • each one-sided bevel relative to the axially parallel end face of the Be won for good reason.
  • the axial groove, and thus the wheel disc thus do not need to be structurally related to the implementation of the invention to be changed.
  • the securing element can be comparatively weight easily be manufactured.
  • the securing element provides good support and holding properties according to claim 7 and 8.
  • the support sections can a certain elastic deformation can be attributed to an axial as possible Surface pressure prevailing uniformly on the blade root with regard to to ensure shape tolerances.
  • an axial gap S left Between the foot end E, radially inside, and the groove base G of the axial groove 3 is an axial gap S left, the installation height - from the left according to Fig. 1 seen to the right - increasingly uniformly widening approximately wedge-shaped is trained.
  • the wedge-shaped course of the axial gap S in the present case is e.g. by the angle of inclination ⁇ characterized, namely between the groove base parallel to the disk G and the tapered, radially inner end E of the Blade base 2.
  • the beveled end E of the blade base 2 can e.g. be provided by a bevel cut.
  • the securing element 6 bridges with a radially outer wall section a recess contained in the blade root 2, open on one side 7, to accommodate a specific weight-balanced balancing mass 8 is formed.
  • the securing element 6 is at least one sectionally wedge-shaped deformed sheet metal strips.
  • This Securing element can e.g. manufactured by punching or embossing processes will. The latter applies in particular to the creation of a Sheet metal bead 9, which essentially provides the required wedge shape, so that the axial gap S and the securing element 6 with respect to the gap height curve that changes axially on one side is essentially wedge-shaped are coordinated.
  • the securing element 6 sits with the side straight-walled sections on groove base G. From the straight-walled Starting sections, the securing element 6 is Sheet metal bead 9 deformed, so that - according to FIG. 2 - one opposite the groove base G partly trapezoidal cross-section open on one side is formed on the locally available end contour of the axial groove 3 is designed to match the axial gap S.
  • the securing element 6 can have end regions on both sides of the axial gap S have support sections St.
  • the support sections St between which the sheet metal bead 9 extends from bent at an angle to the straight-walled sections Sheet metal sections are provided.
  • the invention can also be carried out without said support sections St, namely in combination of the wedge-shaped bead 9 with the tab-like bendable end parts E1, E2.
  • the securing element 6 ' has one on the radially inner one Axial groove contour rounded, coordinated contour.
  • the securing element 6 is the self-contained hollow profile contour of the securing element 6 "e.g. seen from top to bottom, wedge-shaped tapered to the radially inner axial groove contour at gap S. designed.
  • FIGS. 1 to 4 in a modification of FIGS. 1 to 4 can according to the invention in the fuse elements at least to provide the respective wedge shape solid profiles are used at the axial gap S, e.g. by Rolling, forging or pressing processes are produced.

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

Description

Die Erfindung bezieht sich auf eine Einrichtung zur Laufschaufelfixierung und zur Beseitigung von Rotorunwuchten bei axial durchströmten Verdichtern oder Turbinen von Gasturbinentriebwerken gemäß Oberbegriff des Patentanspruchs 1. Eine derartige Einrichtung ist aus der DE-PS 4,300,773 bekannt. Der bekannte Fall behandelt die jeweils gleichzeitige axiale Sicherung der Laufschaufeln und von Füllstücken über ein Sicherungsblech, wobei die Füllstücke jeweils radial unterhalb des Sicherungsbleches im Axialspalt zwischen Fußende und Nutgrund axial festgelegt sind. Für jede Axialnut wird ein Füllstück erforderlich, wobei gegebenenfalls ein oder mehrere Füllstücke bedarfsweise in ein Füllstück mit einer spezifisch abgestimmten Wuchtmasse einwechselbar sind.The invention relates to a device for blade fixing and to eliminate rotor imbalances in case of axial flow Compressors or turbines of gas turbine engines according to the generic term of claim 1. Such a device is from DE-PS 4,300,773 known. The known case deals with the simultaneous one axial securing of the blades and filler pieces a locking plate, the filler pieces radially below the Lock washer in the axial gap between the foot end and groove base axially are set. A filler is required for each axial groove, where appropriate, one or more filler pieces if necessary in one Filler piece exchangeable with a specifically balanced balancing mass are.

Der bekannte Fall setzt ein gewisses Einbau-Spiel zwischen gegenseitigen Auflageflächen der Fuß-Nut-Verzahnungen voraus, wodurch sich insbesondere in Kombination mit einer radial äußeren Deckbandverspannung und-Abstützung der Laufschaufeln Probleme bei der Beseitigung von Rotorunwuchten ergeben; diese Probleme am montierten Laufrad resultieren aus am Umfang unterschiedlichen Sitzpositionen der Laufschaufeln. Die aus den örtlich unterschiedlichen bzw. nicht genau definierbaren Schaufelsitzpositionen resultierenden Scheibenunwuchten können selbst durch mehrfache und oft zeitraubende Wuchtvorgänge nicht beherrscht werden.The known case places a certain installation game between each other Contact surfaces of the foot-groove toothing ahead, which makes especially in combination with a radially outer cover band bracing and support of the blades eliminating problems resulting from rotor imbalance; these problems result on the mounted impeller from different seating positions of the blades. Those from the locally different or not exactly definable Bucket seat positions resulting disc imbalance can even through multiple and often time-consuming balancing processes cannot be mastered.

Schon vorgeschlagene Nietsicherungen für die Laufschaufeln am Laufrad sind ebenfalls mit der zuvor genannten Problematik behaftet. Sie haben ferner den Nachteil eines hohen Montage- und Demontageaufwands. Zudem besteht die Gefahr der örtlichen Beschädigung der Schaufelfüße und der Radscheibe, insbesondere beim Lösen der Vernietung. Auch sind derartige Vernietungen oftmals mit baulichen Veränderungen insbesondere an der Radscheibe bzw. an den Axialnuten verknüpft, woraus wiederum Probleme bezüglich der Bauteilfestigkeit der Radscheibe entstehen können, die am radial äußeren Umfang extrem hoch belastet ist.Rivet locks already proposed for the rotor blades on the impeller are also affected by the aforementioned problem. They have furthermore the disadvantage of a high assembly and disassembly effort. In addition there is a risk of local damage to the blade feet and the Wheel disc, especially when loosening the rivet. Such are also Riveting often with structural changes in particular linked to the wheel disc or on the axial grooves, which in turn causes problems with regard to the component strength of the wheel disc, which is extremely heavily loaded on the radially outer circumference.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung nach der eingangs genannten und bekannten Art anzugeben, die bei montierter Schaufel sicherung einen praktisch spielfreien Sitz der Laufschaufeln an der Radscheibe bei einfacher und montagefreundlichen Bauweise bereitstellt und die zugleich einfachst die Beseitigung möglicher Scheiben-bzw. Rotorunwuchten ermöglicht.The invention has for its object a device according to the Specify the above-mentioned and known type that when assembled Bucket ensures that the blades fit practically without play on the wheel disc with a simple and easy-to-install design and at the same time the simplest possible removal of disc or. Rotor unbalance enabled.

Die gestellte Aufgabe ist mit den Merkmalen des Kennzeichnungsteils des Patentanspruchs 1 erfindungsgemäß gelöst.The task is with the characteristics of the labeling part of claim 1 according to the invention.

Bei der angegebenen Lösung wird jede Laufschaufel spielfrei mit ihren fußseitigen An- bzw. Auflageflächen gegen korrespondierende Auflageflächen der Axialnut im betreffenden Radkranz der Radscheibe gedrückt. Sämtliche Laufschaufeln befinden sich praktisch in einem jeweils gleichförmigen statischen Auflage- und Einbauzustand, so daß eine gegebenenfalls noch an der Scheibe vorhandene Unwucht- bzw. Restunwucht eindeutig definierbar und kompensierbar ist. Sofern eine Scheibenunwucht vorliegt, kann die betreffende spezifisch gewichtlich abgestimmte Wuchtmasse betriebssicher gegenüber dem Sicherungselement in der betreffenden Ausnehmung am Schaufelfuß festgelegt werden. Bei vergleichsweise einfacher Montage- und Demontagemöglichkeit sind die Laufschaufeln und das Sicherungselement in axialer Richtung an der Radscheibe gesichert.In the solution given, each blade is free of play with its foot-side contact or support surfaces against corresponding support surfaces the axial groove in the wheel rim of the wheel disc concerned. All blades are practically in one uniform static support and installation condition, so that a possibly unbalance or residual unbalance still present on the disc is clearly definable and compensable. If there is a disc imbalance is available, the relevant weight-specifically matched Balancing mass reliable against the fuse element in of the relevant recess on the blade root. By comparison simple assembly and disassembly options are the Blades and the securing element in the axial direction on the Wheel disc secured.

Die radiale Spalthöhe kann zumindest in Richtung auf eine Radkranz-bzw. Scheibenstirnseite so groß bemessen sein, daß die Wuchtmasse zunächst über die eine größere seitliche Spaltöffnung in die Ausnehmung am Schaufelfuß einsetzbar ist und hierauf das Sicherungselement verkeilt wird.The radial gap height can at least in the direction of a wheel rim or. Be so large that the balancing mass initially over the a larger lateral gap opening into the recess can be used on the blade root and the securing element is wedged thereon becomes.

Grundsätzlich kann ferner die keilartige Verklemmung zumindest im Sinne der Merkmale nach Anspruch 2 oder 3 durchgeführt werden. Eine intensive und längs des Schaufelfußes möglichst große und gleichförmige Flächenpressung ist insbesondere gemäß Anspruch 4 erzielbar, wonach der Axialspalt und das Sicherungselement hinsichtlich des sich axial ändernden Spalthöhenverlaufs im wesentlichen keilförmig aufeinander abgestimmt gestaltet sind.Basically, the wedge-like jamming can at least in the sense the features of claim 2 or 3 are performed. An intense one and along the blade root as large and uniform as possible Surface pressure can be achieved in particular according to claim 4, after which the axial gap and the securing element with respect to the axially changing gap height course essentially wedge-shaped on each other are coordinated.

Gemäß Anspruch 5 kann der keilförmige Verlauf aus jeweils einseitiger Fußabschrägung relativ zur achsparallelen Endfläche des Nutgrundes gewonnen werden. Die Axialnut, und damit die Radscheibe brauchen somit nicht hinsichtlich der Durchführung der Erfindung baulich verändert zu werden.According to claim 5, the wedge-shaped course of each one-sided bevel relative to the axially parallel end face of the Be won for good reason. The axial groove, and thus the wheel disc thus do not need to be structurally related to the implementation of the invention to be changed.

Mit Anspruch 2 und/oder 6 kann das Sicherungselement vergleichsweise gewichtlich leicht gefertigt werden.With claim 2 and / or 6, the securing element can be comparatively weight easily be manufactured.

Insbesondere über die Blechsicke (Anspruch 7) ergbit sich bei spezifisch geringem Eigengewicht des Sicherungselements eine vergleichsweise einfache Herstellbarkeit und - soweit erforderlich - zugleich ein formsteifer Aufbau. In particular about the sheet metal bead (claim 7) results in specific low weight of the securing element a comparatively easy to manufacture and - if necessary - at the same time a rigid construction.

Gute Stütz- und Halteeigenschaften ergeben sich mit dem Sicherungselement nach Anspruch 7 und 8. Den Stützabschnitten kann eine gewisse elastische Deformation zugeschrieben werden, um eine möglichst axial gleichförmig am Schaufelfuß herrschende Flächenpressung im Hinblick auf Formtoleranzen zu gewährleisten.The securing element provides good support and holding properties according to claim 7 and 8. The support sections can a certain elastic deformation can be attributed to an axial as possible Surface pressure prevailing uniformly on the blade root with regard to to ensure shape tolerances.

Grundsätzlich besteht die Möglichkeit, vorgegebene Bauteiltoleranzen zwischen jeweiligem Fußende und Grund einer Axialnut durch eine vorgegebene Formauswahl an vorrätigen Sicherungselementen auszugleichen.Basically, there is the possibility of predefined component tolerances between the respective foot end and the bottom of an axial groove by a predetermined Compensate the shape selection of available security elements.

Anhand der Zeichnungen ist die Erfindung beispielhaft weiter erläutert; es zeigen:

Fig. 1
einen gemäß Teilausschnitt im Sinne der Schnittlinie II-II der Fig. 2 versetzten Axialschnitt eines radial innen und schaufelseitig außen abgebrochenen Radscheibenabschnitts unter Verdeutlichung einer seitlichen Ansicht des Sicherungselements in axial und radial fester Anordnung im beteffenden axialen Spalt zwichen örtlichem Fußende und Grund einer Axialnut der Radscheibe,
Fig. 2
einen quermittigen Teilausschnitt der Radscheibe nach Fig. 1 unter örtlich quer und mittig geschnittener Zuordnung des an einer Axialnut verankerten Schaufelfußes, des betreffenden Sicherungselements und eines Wuchtgewichts in der örtlichen Fußausnehmung der Laufschaufel, wobei der axiale Spalt mit örtlich größerer Bauhöhe als in Fig. 1 dargestellt ist,
Fig. 3
eine im Sinne der Fig. 2 quer und mittig geschnitten dargestellte erste Abwandlung des Sicherungselements und
Fig. 4
eine im Sinne der Fig. 2 quer und mittig geschnitten dargestellte zweite Abwandlung des Sicherungselements.
The invention is further explained by way of example with reference to the drawings; show it:
Fig. 1
an offset according to the section line II-II of FIG. 2 offset axial section of a radially inner and blade side broken off wheel disc section, showing a lateral view of the securing element in an axially and radially fixed arrangement in the axial gap between the local foot end and the bottom of an axial groove of the wheel disc ,
Fig. 2
1 with a locally transverse and central cut assignment of the blade root anchored to an axial groove, the relevant securing element and a balancing weight in the local foot recess of the rotor blade, the axial gap being shown with a locally greater overall height than in FIG. 1 is
Fig. 3
a transversely and centrally sectioned first modification of the securing element shown in FIG. 2 and
Fig. 4
a second modification of the securing element shown in cross-section and centered in the sense of FIG. 2.

Gemäß Fig. 1 und 2 ist jeweils eine Laufschaufel 1 mit ihrem mehrzahnigen Schaufelfuß 2 an einer entsprechend ausgeformten Axialnut 3 am Radkranz 4 eine Radscheibe 5 verankert. Zwischen dem Fußende E, radial innen, und dem Nutgrund G der Axialnut 3 ist ein axialer Spalt S belassen, der hinsichtlich der Einbauhöhe - gemäß Fig. 1 von links nach rechts gesehen- zunehmend gleichförmig etwa keilförmig sich erweiternd ausgebildet ist. Der keilförmig sich erweiternde Verlauf des axialen Spalts S ist im vorliegende Fall z.B. durch den Neigungswinkel α charakterisiert, und zwar zwischen dem scheibenachsparallelen Nutgrund G und dem hierzu abgeschrägten, radial innen liegenden Ende E des Schaufelfußes 2. Das abgeschrägte Ende E des Schaufelfußes 2 kann z.B. durch einen Schrägschliff bereitgestellt werden.1 and 2 is a blade 1 with its multi-toothed Blade root 2 on a correspondingly shaped axial groove 3 anchored to the wheel rim 4. Between the foot end E, radially inside, and the groove base G of the axial groove 3 is an axial gap S left, the installation height - from the left according to Fig. 1 seen to the right - increasingly uniformly widening approximately wedge-shaped is trained. The wedge-shaped course of the axial gap S in the present case is e.g. by the angle of inclination α characterized, namely between the groove base parallel to the disk G and the tapered, radially inner end E of the Blade base 2. The beveled end E of the blade base 2 can e.g. be provided by a bevel cut.

Innerhalb des axialen Spaltes S ist ein über die rechte offene Spaltseite der Axialnut 3 eingeführtes Sicherungselement 6 keilartig verklemmt. Auf diese Weise wird die Laufschaufel 1 spiellos an der Axialnut 3 festgelegt, wobei entlang gegenseitiger Auflagestellen A (Fig.2), zwischen den Fuß- und Nut-Zahnprofilen, ein fester Stützkontakt ausgebildet ist.Inside the axial gap S is one on the right open gap side the axial groove 3 inserted locking element 6 jammed like a wedge. In this way, the blade 1 is without play on the axial groove 3, whereby along mutual support points A (Fig.2), between the foot and groove tooth profiles, a firm support contact is trained.

Das Sicherungselement 6 überbrückt mit einem radial äußeren Wandabschnitt eine im Schaufelfuß 2 enthaltene, einseitig offen Ausnehmung 7, die zur Aufnahme einer spezifisch gewichtlich abgestimmten Wuchtmasse 8 ausgebildet ist.The securing element 6 bridges with a radially outer wall section a recess contained in the blade root 2, open on one side 7, to accommodate a specific weight-balanced balancing mass 8 is formed.

Gemäß Fig. 1 und 2 ist das Sicherungselement 6 aus einem zumindest abschnittsweise keilförmig verfomrten Blechstreifen gefertigt. Dieses Sicherungselement kann z.B. durch Stanz- oder Prägeverfahren hergestellt werden. Letzteres gilt insbesondere für die Anfertigung einer Blechsicke 9, die im wesentlichen die benötigte Keilform bereitstellt, so daß der Axialspalt S und das Sicherungselement 6 hinsichtlich des sich einseitig axial ändernden Spalthöheverlaufs im wesentlichen keilförmig aufeinander abgestimmt gestaltet sind. 1 and 2, the securing element 6 is at least one sectionally wedge-shaped deformed sheet metal strips. This Securing element can e.g. manufactured by punching or embossing processes will. The latter applies in particular to the creation of a Sheet metal bead 9, which essentially provides the required wedge shape, so that the axial gap S and the securing element 6 with respect to the gap height curve that changes axially on one side is essentially wedge-shaped are coordinated.

Im Beispiel der Fig. 1 und 2 sitzt das Sicherungselement 6 mit seitlich geradwandigen Abschnitten am Nutgrund G auf. Von den geradwandigen Abschnitten ausgehend, ist das Sicherungselement 6 zur Blechsicke 9 verformt, so daß - gemäß Fig. 2 - ein gegenüber dem Nutgrund G teilweise einseitig offener, etwa trapezförmiger Querschnitt ausgebildet ist, der auf die örtlich vorhandene Endkontur der Axialnut 3 am axialen Spalt S abgestimmt gestaltet ist.In the example of FIGS. 1 and 2, the securing element 6 sits with the side straight-walled sections on groove base G. From the straight-walled Starting sections, the securing element 6 is Sheet metal bead 9 deformed, so that - according to FIG. 2 - one opposite the groove base G partly trapezoidal cross-section open on one side is formed on the locally available end contour of the axial groove 3 is designed to match the axial gap S.

Gemäß Fig. 1 kann das Sicherungselement 6 an beidseitigen Endbereichen des axialen Spalts S Stützabschnitte St aufweisen. Die Stützabschnitte St, zwischen denen sich die Blechsicke 9 erstreckt, können von gegenüber den geradwandigen Abschnitten abgewinkelt umgebogenen Blechabschnitten bereitgestellt werden. Ferner enthält das Sicherungselement 6 endseitig axial offene Trennfugen oder -spalte, so daß seitlich außen axial von den Stützabschnitten St vorstehende Endteile E1,E2 laschenartig radial umbiegbar sind, um das Sicherungselement 6 und die betreffende Laufschaufel 1 über den Schaufelfuß 2 axial an der Radscheibe 5 zu sichern.According to FIG. 1, the securing element 6 can have end regions on both sides of the axial gap S have support sections St. The support sections St, between which the sheet metal bead 9 extends from bent at an angle to the straight-walled sections Sheet metal sections are provided. Also contains the securing element 6 axially open joints or gaps at the ends, so that laterally End parts protruding axially from the support sections St E1, E2 can be bent radially like tabs around the securing element 6 and the relevant blade 1 axially on the blade root 2 at the Secure wheel disc 5.

Auch ohne die genannten Stützabschnitte St ist die Erfindung durchführbar, nämlich in Kombination der keilförmigen Sicke 9 mit den laschenartig umbiegbaren Endteilen E1,E2.The invention can also be carried out without said support sections St, namely in combination of the wedge-shaped bead 9 with the tab-like bendable end parts E1, E2.

Fig. 3 und 4 verkörpern in Relation zur jeweiligen Axialnut-Konturvorgabe am axialen Spalt S abgewandelte, hier z.B. über dem Umfang in sich geschlossene Hohlprofilarten für Sicherungselemente 6' bzw. 6''. Gemäß Fig. 3 weist das Sicherungselement 6' eine auf die radial innere Axialnutkontur abgerundet abgestimmte Kontur auf.3 and 4 embody in relation to the respective axial groove contour specification modified at the axial gap S, here e.g. over the scope in closed hollow profile types for securing elements 6 'or 6' '. 3, the securing element 6 'has one on the radially inner one Axial groove contour rounded, coordinated contour.

In Fig. 4 ist die in sich geschlossene Hohlprofilkontur des Sicherungselements 6" z.B., von oben nach unten gesehen, sich keilförmig verjüngend auf die radial innere Axialnutkontur am Spalt S abgestimmt gestaltet. 4 is the self-contained hollow profile contour of the securing element 6 "e.g. seen from top to bottom, wedge-shaped tapered to the radially inner axial groove contour at gap S. designed.

In Abwandlung der Fig. 1 bis 4 können gemäß der Erfindung bei den Sicherungselementen zumindest zur Bereitstellung der jeweiligen Keilform am axialen Spalt S, Vollprofile verwendet werden, die z.B. durch Walz-, Schmiede- oder Pressverfahren hergestellt sind.In a modification of FIGS. 1 to 4 can according to the invention in the fuse elements at least to provide the respective wedge shape solid profiles are used at the axial gap S, e.g. by Rolling, forging or pressing processes are produced.

Claims (9)

  1. Device for rotor-blade fixing and for eliminating rotor balance errors in axial-flow compressors or turbines of gas-turbine driving mechanisms, in which, by means of blade feet (2) which are shaped in a tooth-like manner, the moving blades (1) are anchored on correspondingly formed axial grooves (3) of a wheel disc (5), with an axial gap (S) being left in each case between a blade-foot end and the base of an axial groove (3), in which axial gap is arranged a retaining element (6), the two ends (E1, E2) of which, which ends protrude from the gap, are bent away from each other against faces of the wheel disc (5) and of a blade foot (2), characterised in that each retaining element (6) is jammed in a wedge-like manner in an axial gap (S) between the groove base (G) and the blade foot and in this connection bridges a recess (7), which is formed in the blade foot (2) in order to receive a balancing mass (8).
  2. Device according to claim 1, characterised in that the retaining element (6) is shaped in stages so as to be wedge-shaped with a component cross-section which increases continuously in an axial direction.
  3. Device according to claim 1 or 2, characterised in that the axial gap (S) is formed in a wedge-shaped manner, with overall height increasing continuously in the one axial direction, by end faces of a blade foot (2) and of the groove base (G) that are inclined relative to each other.
  4. Device according to one or more of the claims 1 to 3, characterised in that the axial gap (S) and the retaining element (6) are shaped in such a way that, with regard to the course of the gap height, which changes axially to one side, they are coordinated with each other in a substantially wedge-shaped manner.
  5. Device according to claim 3, characterised in that the wedge-shaped course of the axial gap (S) is formed in each case between an end face at the groove base (G) that is parallel to the axis and the end face (E) of a blade foot (2) that is sloped relative thereto.
  6. Device according to one or more of the claims 1 to 5, characterised in that the retaining element (6) is produced from a sheet-metal strip which is deformed in stages in a wedge-shaped manner.
  7. Device according to claim 6, characterised in that the retaining element (6) is substantially shaped in a wedge-shaped manner by a sheet-metal bead (9), which, starting from straight-walled sections, is formed out in a wedge-shaped manner in the direction of a blade-foot end (E), with the straight-walled sections of the retaining element (6) resting on the groove base.
  8. Device according to claim 6 or 7, characterised in that at end regions of the axial gap (S) on both sides, in coordination with the locally different assembly height, the retaining element (6) has supporting sections (St) for the blade foot (2), which supporting sections are bent round so as to be angled and to which are joined the ends (El, E2) of the retaining element (6), which ends can be bent over separation gaps in a clip-like manner.
  9. Device according to one or more of the claims 1 to 6, characterised in that the retaining element (6, 6', 6"), with regard to the respectively larger portion of the longitudinal extent in the axial gap (S), is shaped as a hollow profile or solid profile coordinated with the locally predetermined contour of the axial groove (3) at the axial gap (S).
EP95112351A 1994-08-29 1995-08-05 Device for locking rotor blades and eliminating rotor imbalance in compressors or turbines of gas turbine engines Expired - Lifetime EP0699824B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4430636A DE4430636C2 (en) 1994-08-29 1994-08-29 Device for fixing the rotor blades and eliminating rotor imbalances in compressors or turbines of gas turbine engines with axial flow
DE4430636 1994-08-29

Publications (2)

Publication Number Publication Date
EP0699824A1 EP0699824A1 (en) 1996-03-06
EP0699824B1 true EP0699824B1 (en) 1998-01-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95112351A Expired - Lifetime EP0699824B1 (en) 1994-08-29 1995-08-05 Device for locking rotor blades and eliminating rotor imbalance in compressors or turbines of gas turbine engines

Country Status (3)

Country Link
US (1) US5584659A (en)
EP (1) EP0699824B1 (en)
DE (2) DE4430636C2 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6984241B2 (en) * 1996-09-13 2006-01-10 Tendon Technology, Ltd. Apparatus and methods for tendon or ligament repair
DE19823157A1 (en) * 1998-05-23 1999-11-25 Asea Brown Boveri Fixing device for running blades of axial-flow turbine machines
ITMI991210A1 (en) * 1999-05-31 2000-12-01 Nuovo Pignone Spa FIXING DEVICE FOR GAS TURBINE PADS
DE19945581B4 (en) * 1999-09-23 2014-04-03 Alstom Technology Ltd. turbomachinery
US6619924B2 (en) 2001-09-13 2003-09-16 General Electric Company Method and system for replacing a compressor blade
US6908279B2 (en) * 2003-11-25 2005-06-21 General Electric Company Method of installing stationary blades of a turbine and turbine structure having a radial loading pin
JP2005273646A (en) * 2004-02-25 2005-10-06 Mitsubishi Heavy Ind Ltd Moving blade element and rotary machine having the moving blade element
EP1643082A1 (en) * 2004-09-30 2006-04-05 Siemens Aktiengesellschaft Turbine blade retention system
FR2918129B1 (en) 2007-06-26 2009-10-30 Snecma Sa IMPROVEMENT TO AN INTERCALE BETWEEN A FOOT OF DAWN AND THE BACKGROUND OF THE ALVEOLE OF THE DISK IN WHICH IT IS MOUNTED
KR200445274Y1 (en) 2007-07-30 2009-07-14 두산중공업(주) A finger type bucket fixing apparatus of a turbine
US7862296B2 (en) * 2007-08-24 2011-01-04 Siemens Energy, Inc. Turbine vane securing mechanism
US20090060746A1 (en) * 2007-08-30 2009-03-05 Honeywell International, Inc. Blade retaining clip
US8182229B2 (en) * 2008-01-14 2012-05-22 General Electric Company Methods and apparatus to repair a rotor disk for a gas turbine
ES2620424T3 (en) 2010-11-15 2017-06-28 Mtu Aero Engines Gmbh Turbomachine with clamping means for axial clamping of a blade root
DE102010053123A1 (en) 2010-12-01 2012-06-06 Mtu Aero Engines Gmbh Method for manufacturing balancing weight for rotary base structure of turbomachine e.g. gas turbine used in aircraft engine, involves forming open profile for base structure of metal sheet by reshaping base structure of metal sheet
IT1403416B1 (en) * 2010-12-21 2013-10-17 Avio Spa BORED ROTOR OF A GAS TURBINE FOR AERONAUTICAL ENGINES AND METHOD FOR COOLING OF THE BORED ROTOR
FR2975428B1 (en) * 2011-05-17 2015-11-20 Snecma TURBOMACHINE AUBES WHEEL
GB2491121B (en) * 2011-05-23 2014-10-01 Rolls Royce Plc Balancing of rotatable components
US8764402B2 (en) * 2011-06-09 2014-07-01 General Electric Company Turbomachine blade locking system
CN102943695B (en) * 2012-08-30 2014-11-26 哈尔滨汽轮机厂有限责任公司 Balancing method for bacterial type looped blade roots and blades
US20140199172A1 (en) * 2013-01-11 2014-07-17 General Electric Company Turbomachine and method of handling turbomachine components
ES2630046T3 (en) * 2013-04-09 2017-08-17 MTU Aero Engines AG Assortment of clamping plates, corresponding gas turbine and assembly method
US9624775B2 (en) 2014-05-30 2017-04-18 Rolls-Royce Plc Developments in or relating to rotor balancing
US10436224B2 (en) * 2016-04-01 2019-10-08 General Electric Company Method and apparatus for balancing a rotor
US11339674B2 (en) 2018-08-14 2022-05-24 Rolls-Royce North American Technologies Inc. Blade retainer for gas turbine engine
KR102261099B1 (en) * 2020-01-31 2021-06-04 두산중공업 주식회사 Structure for combining blade and turbine apparatus having the same
KR102454379B1 (en) * 2020-09-08 2022-10-14 두산에너빌리티 주식회사 rotor and turbo-machine comprising the same

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA557093A (en) * 1958-05-06 A. V. Roe Canada Limited Rotor blade locking device
GB643914A (en) * 1948-03-08 1950-09-27 Joseph Stanley Hall Improvements in and relating to turbine or like blade securing means
GB779059A (en) * 1954-07-15 1957-07-17 Rolls Royce Improvements in or relating to axial-flow fluid machines, for example compressors orturbines of gas-turbine engines
US3076634A (en) * 1959-06-12 1963-02-05 Ass Elect Ind Locking means for compressor and turbine blades
GB945561A (en) * 1961-04-27 1964-01-02 Rolls Royce Improvements in or relating to axial flow compressors
DE1551211A1 (en) * 1966-07-20 1970-02-12 Siemens Ag Detachable blade attachment with mortise connection
DE6606572U (en) * 1967-02-11 1970-10-22 Siemens Ag DETACHABLE BLADE FASTENING FOR TURBO MACHINES
US3720480A (en) * 1971-06-29 1973-03-13 United Aircraft Corp Rotor construction
FR2507679A1 (en) * 1981-06-12 1982-12-17 Snecma DEVICE FOR LOCKING A TURBOMACHINE ROTOR BLADE
GB2105790A (en) * 1981-09-15 1983-03-30 Rolls Royce Balanced bladed rotor
US4451205A (en) * 1982-02-22 1984-05-29 United Technologies Corporation Rotor blade assembly
FR2535794A1 (en) * 1982-11-08 1984-05-11 Snecma AXIAL AND RADIAL BLADE SUPPORT DEVICE
US5100292A (en) * 1990-03-19 1992-03-31 General Electric Company Gas turbine engine blade
DE4300773C1 (en) * 1993-01-14 1993-11-18 Mtu Muenchen Gmbh Axial running blade for gas turbine - has running blades with blade feet anchored in axial grooves distributed over periphery of wheel plate

Also Published As

Publication number Publication date
DE4430636A1 (en) 1996-03-14
US5584659A (en) 1996-12-17
DE4430636C2 (en) 1997-01-23
EP0699824A1 (en) 1996-03-06
DE59501325D1 (en) 1998-02-26

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