EP1215367A2 - Locking device for turbomachine blades - Google Patents

Locking device for turbomachine blades Download PDF

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Publication number
EP1215367A2
EP1215367A2 EP01128574A EP01128574A EP1215367A2 EP 1215367 A2 EP1215367 A2 EP 1215367A2 EP 01128574 A EP01128574 A EP 01128574A EP 01128574 A EP01128574 A EP 01128574A EP 1215367 A2 EP1215367 A2 EP 1215367A2
Authority
EP
European Patent Office
Prior art keywords
blades
fixing device
wedge element
fastening groove
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01128574A
Other languages
German (de)
French (fr)
Other versions
EP1215367A3 (en
EP1215367B1 (en
Inventor
Rene Bachofner
Wolfgang Kappis
Pavel Dr. Rihak
Ferdinand Thüringer
Ulrich Waltke
Hans Dr. Wettstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
Alstom Power NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alstom Technology AG, Alstom Power NV filed Critical Alstom Technology AG
Publication of EP1215367A2 publication Critical patent/EP1215367A2/en
Publication of EP1215367A3 publication Critical patent/EP1215367A3/en
Application granted granted Critical
Publication of EP1215367B1 publication Critical patent/EP1215367B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/32Locking, e.g. by final locking blades or keys
    • F01D5/323Locking of axial insertion type blades by means of a key or the like parallel to the axis of the rotor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3023Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
    • F01D5/303Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
    • F01D5/3038Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/32Locking, e.g. by final locking blades or keys
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/37Impeller making apparatus
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49316Impeller making
    • Y10T29/4932Turbomachine making
    • Y10T29/49321Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49316Impeller making
    • Y10T29/4932Turbomachine making
    • Y10T29/49323Assembling fluid flow directing devices, e.g., stators, diaphragms, nozzles

Definitions

  • the invention relates to a fixing device for blading a Fluid machine, in which a number of blades along a fastening groove introduced and between at least two within the mounting groove An intermediate assembly gap is provided adjacent to the blades two insert elements designed as end halves, which in the Assembly gap can be used and one each to the width of the Intermediate assembly gap have adjusted width and a between them Include a gap into which a wedge element can be inserted that can be wedged in this way is that both end halves are non-positively by the wedge element inside the Fastening groove are fixed.
  • Blades of the above type relate to guidance, but in particular Blades within turbomachines, such as the compressors or Turbine stage of a gas turbine plant.
  • the explanations below preferably refer to blades running along a mounting groove that is provided within the rotor of a turbomachine and this along its Circumferential circumferences are fixed and depending on the respective Position the flow conditions in a suitable manner and opposite possible misalignments occurring during the operation of the Turbo machines but especially against complete detachment from the The fastening groove must be reliably secured. That in relation to the blades too Measures as described below can also be taken also on those in the fixed housing components of turbomachinery integrated guide vanes find application.
  • Known security measures against self-releasing individual blades from the mounting groove generally refer to reducing the clearance between two adjacent blade feet within the fastening groove in the circumferential direction.
  • FIG. 2a shows a cross section through a Fastening groove 1, which is incorporated within a rotor 2.
  • the so-called rotor closure 4 is radial between the two blades 31, 32 in the mounting groove 1 inserted.
  • the rotor end 4 consists, as in Figure 2b in Individual emerges from two so-called closing halves 41, 42 and a wedge element 43.
  • the sides of the closing halves 41, 42 facing the fastening groove 1 are for a positive and positive engagement with the inner contour of the Fastening groove 1 designed accordingly.
  • both end halves 41, 42 When inserted within the Fastening groove 1, both end halves 41, 42 include an intermediate gap 5, in which the wedge element 43 can be inserted radially.
  • the End halves 41, 42 In the upper area, the End halves 41, 42 have a corresponding recess 6 (see Fig. 2b), the each resembles half a heart shape, in the retaining tab 44 of the wedge element 43 as shown in Figure 2a, be spread permanently to both end halves 41, 42 to press permanently against the inner contour of the fastening groove 1.
  • a fixing device according to the preamble of Claim 1, see for example a generic fixing device under Reference to Figures 2a - 2c, designed such that the wedge element at least one connecting element to the side of a blade and at least one of the two blades adjacent to the wedge element one to the Connection element provides corresponding counter-contour, so that Wedge element and the blade an intimate positive connection with each other received.
  • the idea underlying the invention is to create an intimate one Positive connection between the wedge element and at least one directly adjacent blade so that there are no relative displacements between the Blade and the wedge element and connected to the entire rotor tail can occur, whereby the risk potential described above be decisively restricted with regard to the detachment of the wedge element can.
  • the wedge element is direct with both adjacent blades via respective positive connection elements connected.
  • Figure 1a shows a plan view of a composite consisting of two within one Fastening groove (not shown) inserted blades 31, 32 and one rotor end located between the blades 31, 32 4.
  • the rotor end 4 has a wedge element 43, which on its rotor blades 31, 32 facing sides each designed as a dovetail Has connecting element 45, each in one, within the blades 31, 32 incorporated counter contour 46 engages positively and non-positively.
  • the counter contours are 46 clearly visible within the blades 31, 32.
  • To assemble the rotor tail 4 designed according to the invention are first the End halves 41, 42 in the intermediate gap between the blades 31, 32 inserted radially into the mounting groove. Then that will Wedge element 43 designed according to the invention also radially both in the Intermediate gap between the two closing halves 41, 42 as well as within the opposite counter contours 46 of the blades 31, 32 radially introduced.
  • the two adjacent blades 31, 32 by the Wedge element 43 mechanically connected to one another. Is the wedge element 43 completely sunk between the end halves 41, 42, so the retaining tabs 44 of the wedge element 43 in the heart-shaped recesses 6 with the help a suitable tool.
  • connection profiles are also conceivable, for example Hammer profiles of all kinds as well as fir tree profiles.
  • the Counter contour 46 within the blade root of the individual moving blades 31, 32 brought in.
  • the counter contour 46 does not necessarily extend over the total depth of the blade root.
  • Figure 1c is a side view of the rotor tail designed according to the invention 4 shown.
  • Wedge element 43 which is designed according to the invention as a dovetail Connecting element 45, which according to the embodiment in Figure 1c extends the entire length of the blade root.
  • the wedge element 43 has two retaining tabs 44 which fit into the corresponding one Engage recess 6 within the blades 41, 42.

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

Abstract

Fixing device for a blade mounting of a compressor or turbine stage of a gas turbine system comprises a wedge element (43) having at least one connecting element (45) for the side of a blade (31, 32). At least one of the two blades adjacent to the wedge element has a counter-contour (46) corresponding to the connecting element so that the wedge element and the blade engage with each other with a form-locking connection. Preferred Features: The connecting element and the corresponding counter-contour are designed as a dovetail joint.

Description

Technisches GebietTechnical field

Die Erfindung bezieht sich auf eine Fixiervorrichtung für eine Beschaufelung einer Strömungsmaschine, bei der längs einer Befestigungsnut eine Anzahl von Schaufeln eingebracht und zwischen wenigstens zwei innerhalb der Befestigungsnut benachbart eingebrachter Schaufeln ein Montagezwischenspalt vorgesehen ist, mit zwei als Schlusshälften ausgebildeten Einsatzelementen, die in den Montagezwischenspalt einsetzbar sind und jeweils eine an die Breite des Montagezwischenspaltes angepaßte Breite aufweisen sowie zwischen sich einen Spaltraum einschließen, in den ein Keilelement einsetzbar ist, das derart verkeilbar ist, dass beide Schlusshälften kraftschlüssig durch das Keilelement innerhalb der Befestigungsnut fixiert sind.The invention relates to a fixing device for blading a Fluid machine, in which a number of blades along a fastening groove introduced and between at least two within the mounting groove An intermediate assembly gap is provided adjacent to the blades two insert elements designed as end halves, which in the Assembly gap can be used and one each to the width of the Intermediate assembly gap have adjusted width and a between them Include a gap into which a wedge element can be inserted that can be wedged in this way is that both end halves are non-positively by the wedge element inside the Fastening groove are fixed.

Stand der TechnikState of the art

Beschaufelungen der vorstehenden Art betreffen Leit- aber insbesondere Laufschaufeln innerhalb von Strömungsmaschine, wie beispielsweise die Verdichteroder Turbinenstufe einer Gasturbinenanlage. Die nachstehenden Ausführungen beziehen sich vorzugsweise auf Laufschaufeln, die längs einer Befestigungsnut, die innerhalb des Rotors einer Turbomaschine vorgesehen ist und diesen entlang seines Umfanges umläuft, befestigt sind und in Abhängigkeit der jeweiligen Strömungsverhältnisse in geeigneter Weise zu positionieren und gegenüber möglicherweise auftretenden Dejustierungen während des Betriebes der Turbomaschinen aber insbesondere gegen vollständiges Herauslösen aus der Befestigungsnut zuverlässig zu sichern sind. Die in Bezug auf die Laufschaufeln zu treffenden Maßnahmen, wie sie im folgenden beschrieben werden, können ebenso auch auf die in den feststehenden Gehäusebauteilen von Strömungsmaschinen integrierten Leitschaufeln Anwendung finden.Blades of the above type relate to guidance, but in particular Blades within turbomachines, such as the compressors or Turbine stage of a gas turbine plant. The explanations below preferably refer to blades running along a mounting groove that is provided within the rotor of a turbomachine and this along its Circumferential circumferences are fixed and depending on the respective Position the flow conditions in a suitable manner and opposite possible misalignments occurring during the operation of the Turbo machines but especially against complete detachment from the The fastening groove must be reliably secured. That in relation to the blades too Measures as described below can also be taken also on those in the fixed housing components of turbomachinery integrated guide vanes find application.

Die Gefahr des vollständigen Herauslösens einzelner Laufschaufeln aus den jeweiligen Befestigungsvorkehrungen ist gegeben, wenn sich die innerhalb der Befestigungsnuten eingesetzten und in an sich bekannter Weise befestigten Laufschaufeln innerhalb des jeweiligen Montagespiels in Umfangsrichtung längs der Befestigungsnut auf dem Rotor ungleichmäßig verschieben können. Durch derartige periphere Dejustierungen bei einer Vielzahl längs der Befestigungsnut eingesetzten Laufschaufeln kann sich ein zwischen zwei benachbarten Laufschaufeln beachtlicher Spalt einstellen, der groß genug ist, dass sich eine Laufschaufel durch radiale Verdrehung aus der Befestigungsnut lösen kann, wodurch sich ein erheblicher Schaden an der gesamten Turbomaschinenanlage ergibt.The danger of complete separation of individual blades from the The respective fastening precautions are given if the within the Fastening grooves used and fastened in a known manner Blades within the respective assembly play in the circumferential direction along the Can move the mounting groove on the rotor unevenly. Through such peripheral misalignments used in a variety along the mounting groove Blades can be a noticeable one between two adjacent blades Set the gap that is large enough that a rotor blade is separated by radial Can loosen the twist from the mounting groove, resulting in a significant Damage to the entire turbo machine system results.

An sich bekannte Sicherungsmaßnahmen gegen ein sich selbständiges Lösen einzelner Laufschaufeln aus der Befestigungsnut beziehen sich im allgemeinen auf die Reduzierung des Spiels zwischen zwei benachbarten Schaufelfüßen innerhalb der Befestigungsnut in Umfangsrichtung. Nach der Montage aller in die Befestigungsnut eingesetzten Laufschaufeln sowie ganzen und halbierten Zwischenstücke ergibt sich bspw. zwischen zwei benachbart sich innerhalb der Befestigungsnut gegenüberstehenden Laufschaufeln eine Lücke, der sogenannte Montagezwischenspalt, in die zum Schließen der Lücke ein sogenannter Rotor-Schluss eingesetzt wird, der dafür sorgt, dass das zwischen den, in die Befestigungsnut eingesetzten Laufschaufeln sowie Zwischenstücken vorhandene Spiel auf einen Minimum begrenzt wird.Known security measures against self-releasing individual blades from the mounting groove generally refer to reducing the clearance between two adjacent blade feet within the fastening groove in the circumferential direction. After assembling everyone in the Fastening groove used blades as well as whole and halved Intermediate pieces result, for example, between two adjacent ones within the Fastening groove opposite blades a gap, the so-called Intermediate assembly gap into which a so-called rotor closure is used to close the gap is used, which ensures that between the, in the Fastening groove used blades and spacers existing Game is kept to a minimum.

Ein an sich bekannter Rotor-Schluss wird nachstehend unter Bezugnahme auf die Figuren 2a - 2c beschrieben. Figur 2a zeigt einen Querschnitt durch eine Befestigungsnut 1, die innerhalb eines Rotors 2 eingearbeitet ist. Zur gegenseitigen Befestigung zweier innerhalb der Befestigungsnut 1 unmittelbar benachbart angeordneter Laufschaufeln 31, 32, siehe hierzu eine Draufsicht-Abbildung gemäß Figur 2c, ist der sog. Rotor-Schluss 4 radial zwischen den beiden Schaufeln 31, 32 in der Befestigungsnut 1 eingefügt. Der Rotor-Schluss 4 besteht, wie aus Figur 2b im Einzelnen hervorgeht, aus zwei sog. Schlusshälften 41, 42 sowie einem Keilelement 43. Die jeweils der Befestigungsnut 1 zugewandten Seiten der Schlusshälften 41, 42 sind für einen kraft- und formschlüssigen Eingriff mit der Innenkontur der Befestigungsnut 1 entsprechend ausgebildet. Im eingefügten Zustand innerhalb der Befestigungsnut 1 schließen beide Schlusshälften 41, 42 einen Zwischenspalt 5 ein, in den das Keilelement 43 radialwärts einsetzbar ist. Im oberen Bereich weisen die Schlusshälften 41, 42 eine entsprechende Ausnehmung 6 auf (siehe Fig. 2b), die jeweils einer halben Herzform ähnelt, in die Haltelappen 44 des Keilelementes 43 gemäß Darstellung in Figur 2a dauerhaft gespreizt werden, um beide Schlusshälften 41, 42 gegen die Innenkontur der Befestigungsnut 1 dauerhaft zu pressen.A rotor end known per se is described below with reference to FIG Figures 2a - 2c described. Figure 2a shows a cross section through a Fastening groove 1, which is incorporated within a rotor 2. For mutual Attachment of two immediately adjacent within the mounting groove 1 arranged blades 31, 32, see a plan view illustration according to this Figure 2c, the so-called rotor closure 4 is radial between the two blades 31, 32 in the mounting groove 1 inserted. The rotor end 4 consists, as in Figure 2b in Individual emerges from two so-called closing halves 41, 42 and a wedge element 43. The sides of the closing halves 41, 42 facing the fastening groove 1 are for a positive and positive engagement with the inner contour of the Fastening groove 1 designed accordingly. When inserted within the Fastening groove 1, both end halves 41, 42 include an intermediate gap 5, in which the wedge element 43 can be inserted radially. In the upper area, the End halves 41, 42 have a corresponding recess 6 (see Fig. 2b), the each resembles half a heart shape, in the retaining tab 44 of the wedge element 43 as shown in Figure 2a, be spread permanently to both end halves 41, 42 to press permanently against the inner contour of the fastening groove 1.

Jedoch entstehen aufgrund der unterschiedlichen thermischen Ausdehnungsverhalten zwischen den Schaufeln, dem Rotor-Schluss sowie dem Rotor während des Betriebes ein Spiel zwischen den Schaufeln und den innerhalb der Befestigungsnut befindlichen Zwischenstücken einschließlich des Rotor-Schlusses. Aufgrund des sich dabei einstellenden Umfangsspieles kann es vorkommen, dass sich die Schlusshälften derart in Umfangsrichtung längs der Befestigungsnut gegeneinander verschieben, dass sich das gespreizte Keilelement aus den herzförmig ausgeformten Ausnehmungen lösen kann. Ein derartiger Fall führt wiederum zu dem eingangs bereits beschriebenen Schadensszenario.However arise due to the different thermal Expansion behavior between the blades, the rotor tail and the Rotor during operation a game between the blades and the inside the intermediate groove, including the rotor end. Because of the extensive play that arises, it can occur that the closing halves in the circumferential direction along the Push the fastening groove against each other so that the spread wedge element can loosen from the heart-shaped recesses. Such a case in turn leads to the damage scenario already described at the beginning.

Darstellung der ErfindungPresentation of the invention

Es besteht daher die Aufgabe, eine gattungsgemäße Fixiervorrichtung, wie sie bspw. aus den Figuren 2a - 2c hervorgeht, derart weiterzubilden, dass das vorstehend beschriebene Schadensszenario ausgeschlossen werden kann. Die betreffenden Maßnahmen sollen konstruktiv möglichst einfach und in der Realisierung kostengünstig sein.There is therefore the task of a generic fixing device such as. from Figures 2a - 2c emerges to develop such that the above described damage scenario can be excluded. The concerned Measures should be as simple as possible in construction and in implementation be inexpensive.

Die Lösung der der Erfindung zugrundeliegenden Aufgabe ist im Anspruch 1 angegeben. Den Erfindungsgedanken vorteilhaft weiterbildenden Merkmale sind Gegenstand der Unteransprüche und insbesondere der Beschreibung unter Bezugnahme auf die Figuren zu entnehmen.The object on which the invention is based is achieved in claim 1 specified. Features which advantageously further develop the idea of the invention Subject of the subclaims and in particular the description below Refer to the figures.

Erfindungsgemäß ist eine Fixiervorrichtung gemäß des Oberbegriffes des Anspruches 1, siehe bspw. eine gattungsgemäße Fixiervorrichtung unter Bezugnahme auf die Figuren 2a - 2c, derart ausgebildet, dass das Keilelement zumindest ein Verbindungselement zur Seite einer Schaufel und zumindest eine der beiden an das Keilelement angrenzenden Schaufeln eine zu dem Verbindungselement korrespondierende Gegenkontur vorsieht, so dass das Keilelement und die Schaufel eine innige Formschlussverbindung miteinander eingehen.According to the invention is a fixing device according to the preamble of Claim 1, see for example a generic fixing device under Reference to Figures 2a - 2c, designed such that the wedge element at least one connecting element to the side of a blade and at least one of the two blades adjacent to the wedge element one to the Connection element provides corresponding counter-contour, so that Wedge element and the blade an intimate positive connection with each other received.

Die der Erfindung zugrundeliegende Idee ist die Schaffung einer innigen Formschlussverbindung zwischen dem Keilelement und wenigstens einer unmittelbar angrenzenden Laufschaufel, so dass keine Relativverschiebungen zwischen der Laufschaufel und dem Keilelement und damit verbunden dem gesamten Rotor-Schluss auftreten können, wodurch das eingangs beschriebene Gefahrenpotential bezüglich des Herauslösens des Keilelementes entscheidend eingeschränkt werden kann.The idea underlying the invention is to create an intimate one Positive connection between the wedge element and at least one directly adjacent blade so that there are no relative displacements between the Blade and the wedge element and connected to the entire rotor tail can occur, whereby the risk potential described above be decisively restricted with regard to the detachment of the wedge element can.

In besonders vorteilhafter Weise ist das Keilelement mit beiden unmittelbar benachbarten Schaufeln über jeweilige formschlüssige Verbindungselemente verbunden. Eine derartig erfindungsgemäße Ausbildung einer Fixiervorrichtung ist nachstehend unter Bezugnahme auf die Figuren näher erläutert.In a particularly advantageous manner, the wedge element is direct with both adjacent blades via respective positive connection elements connected. Such a design of a fixing device according to the invention is explained in more detail below with reference to the figures.

Kurze Beschreibung der ErfindungBrief description of the invention

Die Erfindung wird nachstehend ohne Beschränkung des allgemeinen Erfindungsgedankens anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen exemplarisch beschrieben. Es zeigen:

Fig. 1a
Draufsicht eines erfindungsgemäß ausgebildeten Rotor-Schlusses in Verbindung mit zwei benachbarten Schaufeln,
Fig. 1b
Einzelkomponentendarstellung in Draufsicht der gemäß in Figur 1a dargestellten Komponenten,
Fig. 1c
Seitenansicht des erfindungsgemäß ausgebildeten Rotor-Schlusses,
Fig. 2a - c
Darstellungen eines an sich bekannten Rotor-Schlusses (Stand der Technik).
The invention is described below by way of example without limitation of the general inventive concept using exemplary embodiments with reference to the drawings. Show it:
Fig. 1a
Top view of a rotor tail designed according to the invention in connection with two adjacent blades,
Fig. 1b
Individual component representation in top view of the components shown in FIG. 1a,
Fig. 1c
Side view of the rotor tail designed according to the invention,
2a-c
Representations of a rotor end known per se (prior art).

Wege zur Ausführung der Erfindung, gewerbliche VerwendbarkeitWAYS OF IMPLEMENTING THE INVENTION, INDUSTRIAL APPLICABILITY

Figur 1a zeigt eine Draufsicht auf einen Verbund bestehend aus zwei innerhalb einer Befestigungsnut (nicht dargestellt) eingefügter Laufschaufeln 31, 32 und einem zwischen den Laufschaufeln 31, 32 befindlichen Rotor-Schluss 4. Der Rotor-Schluss 4 weist ein Keilelement 43 auf, das an seinen den Laufschaufeln 31, 32 zugewandten Seiten jeweils ein als Schwalbenschwanz ausgebildetes Verbindungselement 45 aufweist, das in jeweils in eine, innerhalb der Laufschaufeln 31, 32 eingearbeitete Gegenkontur 46 form- und kraftschlüssig eingreift.Figure 1a shows a plan view of a composite consisting of two within one Fastening groove (not shown) inserted blades 31, 32 and one rotor end located between the blades 31, 32 4. The rotor end 4 has a wedge element 43, which on its rotor blades 31, 32 facing sides each designed as a dovetail Has connecting element 45, each in one, within the blades 31, 32 incorporated counter contour 46 engages positively and non-positively.

Durch die erfindungsgemäß zwischen dem Rotor-Schluss 4 und beiden Laufschaufeln 31, 32 eingefügte mechanische Verbindung können Relativbewegungen bedingt durch unterschiedliche thermische Ausdehnungserscheinungen ausgeschlossen werden, so dass sich kein unzulässiger Zwischenspalt längs der Befestigungsnut ausbilden kann, durch den sich die Gefahr eines Herauslösens von innerhalb der Befestigungsnut befindlichen Teilen ergeben würde.Due to the invention between the rotor end 4 and both Blades 31, 32 inserted mechanical connection can Relative movements due to different thermal Expansion phenomena are excluded, so that there is no impermissible Intermediate gap along the fastening groove can form through which the danger result in a detachment of parts located within the fastening groove would.

In der Einzelkomponentendarstellung gemäß Figur 1b sind die Gegenkonturen 46 innerhalb der Laufschaufeln 31, 32 klar ersichtlich. Zur Montage des erfindungsgemäß ausgebildeten Rotor-Schlusses 4, werden zunächst die Schlusshälften 41, 42 in den Zwischenspalt zwischen den Laufschaufeln 31, 32 radialwärts in die Befestigungsnut eingefügt. Anschließend wird das erfindungsgemäß ausgebildete Keilelement 43 ebenfalls radialwärts sowohl in den Zwischenspalt zwischen beiden Schlusshälften 41, 42 als auch innerhalb der sich gegenüberliegenden Gegenkonturen 46 der Laufschaufeln 31, 32 radial eingeführt. Hierdurch werden die beiden benachbart liegenden Laufschaufeln 31, 32 durch das Keilelement 43 mechanisch miteinander verbunden. Ist das Keilelement 43 vollständig zwischen den Schlusshälften 41, 42 versenkt, so werden die Haltelappen 44 des Keilelementes 43 in die herzförmig ausgebildeten Ausnehmungen 6 mit Hilfe eines geeigneten Werkzeuges verpresst.In the individual component representation according to FIG. 1b, the counter contours are 46 clearly visible within the blades 31, 32. To assemble the rotor tail 4 designed according to the invention, are first the End halves 41, 42 in the intermediate gap between the blades 31, 32 inserted radially into the mounting groove. Then that will Wedge element 43 designed according to the invention also radially both in the Intermediate gap between the two closing halves 41, 42 as well as within the opposite counter contours 46 of the blades 31, 32 radially introduced. As a result, the two adjacent blades 31, 32 by the Wedge element 43 mechanically connected to one another. Is the wedge element 43 completely sunk between the end halves 41, 42, so the retaining tabs 44 of the wedge element 43 in the heart-shaped recesses 6 with the help a suitable tool.

Neben der Ausbildung des Verbindungselementes 45 als Schwalbenschwanz sind grundsätzlich auch alternative Verbindungsprofile denkbar, wie beispielsweise Hammerprofile aller Art sowie auch Tannenbaumprofile. Vorzugsweise ist die Gegenkontur 46 innerhalb des Schaufelfußes der einzelnen Laufschaufeln 31, 32 eingebracht. Nicht notwendigerweise erstreckt sich die Gegenkontur 46 über die gesamte Tiefe des Schaufelfußes.In addition to the formation of the connecting element 45 as a dovetail alternative connection profiles are also conceivable, for example Hammer profiles of all kinds as well as fir tree profiles. Preferably the Counter contour 46 within the blade root of the individual moving blades 31, 32 brought in. The counter contour 46 does not necessarily extend over the total depth of the blade root.

In Figur 1c ist eine Seitenansicht auf den erfindungsgemäß ausgebildeten Rotor-Schluss 4 dargestellt. Im Unterschied zur Darstellung gemäß Figur 2b weist das Keilelement 43 das erfindungsgemäß als Schwalbenschwanz ausgebildete Verbindungselement 45 auf, das sich gemäß der Ausführungsform in Figur 1c über die gesamte Länge des Schaufelfusses erstreckt. Ebenso wie im Fall der Figur 2b weist das Keilelement 43 zwei Haltelappen 44 auf, die in die entsprechende Ausnehmung 6 innerhalb der Laufschaufeln 41, 42 eingreifen.In Figure 1c is a side view of the rotor tail designed according to the invention 4 shown. In contrast to the representation according to FIG Wedge element 43 which is designed according to the invention as a dovetail Connecting element 45, which according to the embodiment in Figure 1c extends the entire length of the blade root. Just as in the case of Figure 2b the wedge element 43 has two retaining tabs 44 which fit into the corresponding one Engage recess 6 within the blades 41, 42.

Ebenso ist es denkbar, dass weitere Verbindungselemente zwischen den einzelnen Schlusshälften 41, 42 und den diesen unmittelbar angrenzenden Laufschaufeln 31, 32 vorgesehen sind. Auf diese Weise kann eine weiter verbesserte mechanisch innige Verbindung zwischen den erfindungsgemäß ausgebildeten Rotor-Schluss und den benachbarten Laufschaufeln erreicht werden.
Erfindungsgemässe Verbindungselemente können auch an anderer Stelle in der selben Schaufelreihe eingebaut werden.
It is also conceivable that further connecting elements are provided between the individual closing halves 41, 42 and the rotor blades 31, 32 directly adjacent to these. In this way, a further improved mechanically intimate connection between the rotor closure designed according to the invention and the adjacent rotor blades can be achieved.
Connecting elements according to the invention can also be installed elsewhere in the same row of blades.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Befestigungsnutmounting groove
22
Rotorrotor
31,3231.32
Schaufelnshovel
44
Rotor-SchlussRotor end
41, 4241, 42
Schlusshälftenfinal halves
4343
Keilelementkey member
4444
Haltelappenretaining tabs
4545
Verbindungselementconnecting element
4646
Gegenkonturmating contour
55
Zwischenspaltintermediate gap
66
Ausnehmungenrecesses

Claims (9)

Fixiervorrichtung für eine Beschaufelung einer Strömungsmaschine, bei der längs einer Befestigungsnut (1) eine Anzahl von Schaufeln (31, 32) eingebracht ist und zwischen wenigstens zwei innerhalb der Befestigungsnut (1) benachbart eingebrachter Schaufeln (31, 32) ein Montagezwischenspalt vorgesehen ist, mit zwei als Schlusshälften (41, 42) ausgebildeten Einsatzelementen, die in den Montagezwischenspalt einsetzbar sind und jeweils eine an die Breite des Montagezwischenspaltes angepaßte Breite aufweisen sowie zwischen sich einen Spaltraum (5) einschließen, in den ein Keilelement (43) einsetzbar ist, das derart verkeilbar ist, dass beide Schlusshälften (41, 42) formschlüssig durch das Keilelement (43) innerhalb der Befestigungsnut (1) fixiert sind,
dadurch gekennzeichnet, dass das Keilelement (43) zumindest ein Verbindungselement (45) zur Seite einer Schaufel (31, 32) und zumindest eine der beiden an das Keilelement (43) angrenzenden Schaufeln (31, 32) eine zu dem Verbindungselement (45) korrespondierende Gegenkontur (46) vorsieht, sodass das Keilelement (43) und die Schaufel (31, 32) eine Formschlußverbindung miteinander eingehen.
Fixing device for a blading of a turbomachine, in which a number of blades (31, 32) is introduced along a fastening groove (1) and an intermediate assembly gap is provided between at least two blades (31, 32) inserted adjacent within the fastening groove (1) two insert halves (41, 42), which can be inserted in the intermediate assembly gap and each have a width adapted to the width of the intermediate assembly gap, and enclose between them a gap space (5) into which a wedge element (43) can be inserted, such as this can be wedged so that both end halves (41, 42) are positively fixed within the fastening groove (1) by the wedge element (43),
characterized in that the wedge element (43) has at least one connecting element (45) on the side of a blade (31, 32) and at least one of the two blades (31, 32) adjoining the wedge element (43) one corresponding to the connecting element (45) Provides counter contour (46) so that the wedge element (43) and the blade (31, 32) form a positive connection with each other.
Fixiervorrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass das Verbindungselement (45) und die korrespondierende Gegenkontur (46) als Schwalbenschwanzverbindung ausgebildet sind.
Fixing device according to claim 1,
characterized in that the connecting element (45) and the corresponding counter-contour (46) are designed as dovetail connections.
Fixiervorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass das Keilelement (43) beidseitig zu beiden angrenzenden Schaufeln (31, 32) Verbindungselemente (45) zur Herstellung jeweils einer Formschlußverbindung vorsieht.
Fixing device according to claim 1 or 2,
characterized in that the wedge element (43) on both sides to the two adjacent blades (31, 32) provides connecting elements (45) for producing a positive connection.
Fixiervorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass das Keilelement (43) radial zwischen beide Schaufeln (31, 32) und beide Schlusshälften (41, 42) einschiebbar ist und Haltelappen (44) vorsieht, die in entsprechend in den Schlusshälften (41, 42) vorgesehene Ausnehmungen (6) dauerhaft spreizbar sind.
Fixing device according to one of claims 1 to 3,
characterized in that the wedge element (43) can be inserted radially between the two blades (31, 32) and both end halves (41, 42) and provides retaining tabs (44) which are provided in recesses (6.) provided in the end halves (41, 42) ) are permanently spreadable.
Fixiervorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass das wenigstens ein Verbindungselement (45) sowie die korrespondierende Gegenkontur (46) als Hammerprofil oder in Tannenbaumform ausgebildet ist.
Fixing device according to one of claims 1 to 4,
characterized in that the at least one connecting element (45) and the corresponding counter-contour (46) is designed as a hammer profile or in the form of a fir tree.
Fixiervorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass die Schaufeln (31, 32) Laufschaufeln innerhalb einer Rotoranordnung oder Leitschaufeln innerhalb einer Statoranordnung sind.
Fixing device according to one of claims 1 to 5,
characterized in that the blades (31, 32) are rotor blades within a rotor arrangement or guide blades within a stator arrangement.
Fixiervorrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass die Strömungsmaschine eine Verdichtereinheit oder eine Turbinenstufe innerhalb einer Gasturbinenanlage ist.
Fixing device according to one of claims 1 to 6,
characterized in that the turbomachine is a compressor unit or a turbine stage within a gas turbine system.
Fixiervorrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass die Schaufeln (31, 32) in einer Schaufelreihe angeordnet sind und wenigstens eine Formschlußverbindung in der Schaufelreihe zwischen dem Keilelement (43) und einer Schaufel (31, 32) vorgesehen ist.
Fixing device according to one of claims 1 to 7,
characterized in that the blades (31, 32) are arranged in a row of blades and at least one interlocking connection is provided in the row of blades between the wedge element (43) and a blade (31, 32).
Fixiervorrichtung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, dass die Schaufeln (31, 32) einer Schaufelreihe in einer Befestigungsnut (1) befestigt sind.
Fixing device according to one of claims 1 to 9,
characterized in that the blades (31, 32) of a row of blades are fastened in a fastening groove (1).
EP01128574A 2000-12-16 2001-11-30 Locking device for turbomachine blades Expired - Lifetime EP1215367B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10062908 2000-12-16
DE10062908 2000-12-16

Publications (3)

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EP1215367A2 true EP1215367A2 (en) 2002-06-19
EP1215367A3 EP1215367A3 (en) 2004-01-21
EP1215367B1 EP1215367B1 (en) 2006-12-27

Family

ID=7667528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01128574A Expired - Lifetime EP1215367B1 (en) 2000-12-16 2001-11-30 Locking device for turbomachine blades

Country Status (3)

Country Link
US (1) US6647602B2 (en)
EP (1) EP1215367B1 (en)
DE (2) DE10134611A1 (en)

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EP1457642A2 (en) * 2003-03-11 2004-09-15 Alstom Technology Ltd Device for fixing blades to the rotor
EP1698758A2 (en) * 2005-02-23 2006-09-06 ALSTOM Technology Ltd Axially split rotor end piece
US7367778B2 (en) 2005-02-23 2008-05-06 Alstom Technology Ltd. Rotor end piece
WO2016195657A1 (en) * 2015-06-02 2016-12-08 Siemens Aktiengesellschaft Locking spacer assembly between compressor blade structures in a turbine engine

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DE10346239A1 (en) 2003-10-06 2005-04-21 Alstom Technology Ltd Baden Method for fixing the blading of a turbomachine and fixing device
US7435055B2 (en) * 2005-03-29 2008-10-14 Siemens Power Generation, Inc. Locking spacer assembly for a turbine engine
EP1803900A1 (en) * 2006-01-02 2007-07-04 Siemens Aktiengesellschaft Closure unit for the remaining space between the first and the last blades of a bladed ring inserted in a circumferencial slot of a turbomachine, and corresponding turbomachine
EP1803899A1 (en) * 2006-01-02 2007-07-04 Siemens Aktiengesellschaft Blade locking assembly for a turbomachine
US8523529B2 (en) * 2009-11-11 2013-09-03 General Electric Company Locking spacer assembly for a circumferential entry airfoil attachment system
US20110255978A1 (en) * 2010-04-16 2011-10-20 Brian Denver Potter Locking Assembly For Circumferential Attachments
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US9341071B2 (en) * 2013-10-16 2016-05-17 General Electric Company Locking spacer assembly
EP3115554A1 (en) * 2015-07-09 2017-01-11 Siemens Aktiengesellschaft Rotor blade assembly with elastic support members for a thermal turbomachine
US10465699B2 (en) 2017-01-26 2019-11-05 DOOSAN Heavy Industries Construction Co., LTD Compressor blade locking mechanism in disk with tangential groove
US10519970B2 (en) 2017-02-09 2019-12-31 DOOSAN Heavy Industries Construction Co., LTD Compressor blade locking mechanism in disk with tangential groove
EP3752716B1 (en) 2018-03-28 2021-10-13 Siemens Energy Global GmbH & Co. KG Locking spacer assembly, corresponding blade assembly and method for installing a locking spacer
EP3765715B1 (en) 2018-04-18 2021-12-29 Siemens Energy Global GmbH & Co. KG Locking spacer assembly, blade assembly and method for installing a locking spacer

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EP1457642A2 (en) * 2003-03-11 2004-09-15 Alstom Technology Ltd Device for fixing blades to the rotor
EP1457642A3 (en) * 2003-03-11 2006-07-26 Alstom Technology Ltd Device for fixing blades to the rotor
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CN1534167B (en) * 2003-03-11 2010-05-26 阿尔斯托姆科技有限公司 Rotor terminal
EP1698758A2 (en) * 2005-02-23 2006-09-06 ALSTOM Technology Ltd Axially split rotor end piece
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US7367778B2 (en) 2005-02-23 2008-05-06 Alstom Technology Ltd. Rotor end piece
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WO2016195657A1 (en) * 2015-06-02 2016-12-08 Siemens Aktiengesellschaft Locking spacer assembly between compressor blade structures in a turbine engine

Also Published As

Publication number Publication date
DE50111726D1 (en) 2007-02-08
US20020127105A1 (en) 2002-09-12
DE10134611A1 (en) 2002-06-27
EP1215367A3 (en) 2004-01-21
EP1215367B1 (en) 2006-12-27
US6647602B2 (en) 2003-11-18

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