EP1515001A2 - Blade to blade connection in a turbomachine - Google Patents

Blade to blade connection in a turbomachine Download PDF

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Publication number
EP1515001A2
EP1515001A2 EP04104236A EP04104236A EP1515001A2 EP 1515001 A2 EP1515001 A2 EP 1515001A2 EP 04104236 A EP04104236 A EP 04104236A EP 04104236 A EP04104236 A EP 04104236A EP 1515001 A2 EP1515001 A2 EP 1515001A2
Authority
EP
European Patent Office
Prior art keywords
support surface
counter
pressure body
blade
approach
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
EP04104236A
Other languages
German (de)
French (fr)
Other versions
EP1515001A3 (en
EP1515001B1 (en
Inventor
Eduard GÖTZFRIED
Heinz-Dieter Tremmel
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
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Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP1515001A2 publication Critical patent/EP1515001A2/en
Publication of EP1515001A3 publication Critical patent/EP1515001A3/en
Application granted granted Critical
Publication of EP1515001B1 publication Critical patent/EP1515001B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
    • F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
    • 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
    • F01D5/12—Blades
    • F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/23—Three-dimensional prismatic
    • F05D2250/232—Three-dimensional prismatic conical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/24—Three-dimensional ellipsoidal
    • F05D2250/241—Three-dimensional ellipsoidal spherical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/96—Preventing, counteracting or reducing vibration or noise

Definitions

  • the present invention relates to a binding of blades of a turbomachine with the features of the preamble of claim 1.
  • a blade binding of the type mentioned are known, are provided in the approaches that extend in the circumferential direction, in pairs are rigidly connected to a blade and each one via at least one pressure body at the circumferentially adjacent Support the approach.
  • each pressure body at one of the associated A n-set facing holding side on a holding contour, in one of the associated Approach trained receptacle protrudes and in it in the circumferential direction and transversely supported.
  • each pressure body at one of the adjacent Approach facing support side on a flat support surface which adjoins one of the adjacent approach associated flat counter-support surface area supported.
  • the retaining contours of the Pressure body each formed as a cone.
  • the associated shots are also formed as a cone, wherein the cone of the retaining contour, however, a has conicity other than the taper of the receptacle. This will achieve that manufacturing tolerances of the seat and the pressure hull by minor plastic deformations on the outer edge of the cone holder and the Konushaltekontur can be compensated.
  • the known blade binding works optimally when in operation of the turbomachine Only relative movements occur that are parallel to the support surface run. The support surface can then slide on the mating support surface. In practice, however, not only parallel guided relative movements between the approaches to be supported or linked to each other on. Especially when starting a turbine or certain Low load operating phases, e.g. during the ventilation in the last turbine stage, There may be twisting and twisting of the blades and Thus, the approaches come, which in particular to an increased swing n-gungsbe screwung the blade binding leads. Rotational movements between the However, approaches lead to a line or point load of the respective Pressure body, resulting in a brittle fracture of the hard pressure body or can lead to cracking of the pressure body seat.
  • the object is underlying, for a blade binding of the type mentioned an improved Specify an embodiment that allows manufacturing tolerances, games, elastic deformation and similar factors exclusively by a sliding movement compensate.
  • the invention is based on the general idea, the holding contour of the Pressure body and the contour of the associated recording as complementary ball sections train.
  • This construction is achieved on the one hand, that the pressure body is supported flat on the associated approach.
  • the other is by this measure, a ball head bearing of the pressure hull on the associated Approach formed, which allows the pressure body, its support surface to turn the ball center.
  • the lugs or the blades for example during startup
  • the rotatably mounted pressure body these relative movements compensate, so that always a two-dimensional force transmission between the mutually supported or interconnected approaches is achievable.
  • an automatic adjustment the movably mounted pressure hull. Stress peaks are thereby avoided. In operation at rated speed, however, comes the friction damping due to the extensive plant to full advantage. There are no high-frequency Tilting movements.
  • the ball portion of the retaining contour a ball center, while the support surface is circular and a Center of the circle has.
  • the pressure body is then designed so that a straight line, extending through both the center of the circle and the center of the sphere extends, is perpendicular to the support surface plane.
  • the Pressure body is constructed rotationally symmetrical with respect to this line.
  • the mating support surface associated with the adjacent lug and on which For example, the support surface of the pressure hull is supported flat be formed directly on the front side of the adjacent approach.
  • this counter support surface may be formed on an abutment member which is fixed to an end face of the adjacent approach. It is also possible to form the counter support surface by the support surface of a counter-pressure body, which is supported on the adjacent approach.
  • the pressure body and counterpressure body can be identical. However, preference is given to an embodiment in which the counter-pressure body can not carry out tumbling movements with respect to the normal direction of its counter-support surface. In this way, all compensatory movements are performed exclusively by the ball-bearing pressure body. This ensures that the movable pressure body with appropriate twists of the approaches again and again adjusted by itself to its original position
  • both the counter-pressure body at the associated approach there is a two-dimensional system the counter-pressure body at the associated approach.
  • the counter-pressure body fixed with respect to its longitudinal central axis rigidly at the neck and can serve as an abutment for the pressure body supported thereon.
  • rotor blades 1 are otherwise not shown Turbomachine each with two, on different sides of the airfoil lying approaches 2 equipped. These approaches 2 extend in a direction indicated by an arrow circumferential direction 3, in which the blades 1 circulating in the operation of the turbomachine.
  • the lugs 2 are rigid with the respective blade 1 and in particular an integral Part of the respective blade 1 form.
  • the approaches are useful 2 designed in the form of support wings, which have aerodynamic profiles and usually disposed between the radial ends of the blades 1 are.
  • the approaches 2 but also as cover plates or Shrouds be designed, which at the radially outer ends of the Blades 1 are arranged.
  • the approaches 2 and others Be binding elements.
  • the lugs 2 are based on their End faces 4 not directly from each other, but indirectly each at least over a pressure body 7 (see Figures 2 to 4). However, these pressure bodies 7 are not shown to simplify the illustration in FIGS. 1a and 1b.
  • Figs. 2 to 4 are each the opposite End portions of a pair of lugs 2, at least in operation support the turbomachine against each other, cut reproduced, during the arranged in this area pressure body 7 is not cut is shown. It is clear that the sectional view of Figs. 2 to 4 also a Can correspond to the section around the section line II in the plane of the drawing Fig. 1b is rotated by 90 °.
  • each pressure body 7 has a spherical Holding side 8 and a flat support side 9. While the holding side 8 that Approach approach 2, which the respective pressure body 7 is assigned (according to 2 to 4 each of the right approach 2), the support side 9 is the one in the circumferential direction 3 adjacent approach 2 facing (ie according to FIGS. 2 to 4, respectively the left approach 2). On the holding side 8 is a down or protruding Holding contour 10 is formed.
  • the approach 2 which is associated with the pressure body 7, has on its front side 4 a receptacle 11, in which the holding contour 10th the pressure body 7 is inserted.
  • the holding contour 10 thus projects into the receptacle 11 in and can be in it in the circumferential direction 3 and transverse to the circumferential direction Support 3.
  • the retaining contour 10 is now a ball section educated.
  • the recording 11 also as Ball section formed.
  • the ball sections have the same radius R, whereby the ball portion of the retaining contour 10 flat on the ball portion the recording 11 comes to rest.
  • the inventive Pressure body 7 thereby a kind of ball joint, in a joint socket around a Ball center 12 is movably mounted on the associated approach 2.
  • the socket is formed by the receptacle 11.
  • the radii of pressure hull. 7 and recording 11 also differ slightly.
  • the pressure body 7 has on its support side 9 a flat support surface 13. As is apparent from FIGS. 2 to 4, the pressure body 7 is supported at least during operation of the turbomachine with its support surface 13 on a mating support surface 14, which is assigned to the adjacent support wing 2. Also the Counter support surface 14 is configured just so that the support surfaces 13 and 14 lie flat against each other.
  • the pressure body according to the invention 7 between the interconnected lugs 2 comparatively large Transfer forces F in the circumferential direction 3.
  • due to friction also coupling moments M between adjacent blades 1 over the interconnected approaches 2 are transmitted.
  • Because of the moving Storage of the pressure hull 7 on the associated approach 2 can also Rotary adjustments or twists between adjacent blades 1 or between mutually supported approaches 2 are compensated.
  • By the proposed storage of the pressure hull 7 remains the area conditioning obtained between the support surfaces 13 and 14, as well as the surface conditioning between the retaining contour 10 and the receptacle 11.
  • the blade binding according to the invention can thus be used during operation, above all when starting and stopping, possibly occurring rotational movements and different Balancing angular positions of the approaches 2, without it comes to greater elastic or even plastic deformation.
  • the geometry of the support body 7 is suitably chosen so that the support surface 13 is configured circular and has a circle center 15.
  • the spherical one Holding contour 10 is matched to the flat support surface 13, that a straight line 16, through both the center of the circle 15 and through the ball center 12 extends perpendicular to the plane of the support surface 13th stands. This results in a rotational symmetry for the pressure body 7, so that the storage achieved in this way acts as it were in all spatial directions.
  • the counter support surface 14 is instantaneous formed on the front side 4 of the adjacent approach 2.
  • the counter support surface 14 may also be formed on a special abutment element 17.
  • This abutment element 17 is on the front side 4 of the adjacent approach 2 fixed, in particular by soldering or welding.
  • the abutment member 17 is designed as a plate which in the Inserted end face 4 of the adjacent approach 2 and arranged sunk therein is.
  • the counter support surface 14 also be formed on a counterpressure body 18.
  • the Back pressure body 18 has - as well as the pressure body 7 - a support side 19 with a flat support surface which forms the counter support surface 14.
  • the counter-pressure member 18 equipped with a holding side 20 at a holding contour 21 is formed.
  • the retaining contour 21 of the counter-pressure body 18 is inserted into a corresponding receptacle 22 which in the adjacent Approach 2 is formed.
  • the shape of the retaining contour 21 of the Back pressure body 18 and the cooperating receptacle 22 are there coordinated so that the counter-support surface 14 of the counter-pressure body 18 is fixed relative to the associated approach 2 spatially.
  • the counter-pressure member 18 about its longitudinal central axis to rotate, however, while the plane of its counter-support surface 14 remains relative to the associated approach 2 invariant.
  • the support surfaces 13 and / or the counter support surfaces 14 with a low-friction coating be provided (not shown). At the same time can by this measure in the plane of the support surfaces 13 and the counter support surfaces 14 occurring Frictional forces are reduced.
  • the abutment element 17 according to FIG. 3 be made of a suitable carbide.

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

Abstract

A method for fitting turbine blades has the blades secured into support blocks (2) arranged around the turbine and linked by thrust faces (4). A thrust element (8) is fitted into one end of each block and presents a flat thrust surface (13) to the adjacent block. Each thrust element has a spherical profile fitted into a correspondingly spherical recess to provide automatic tilt adjustment. The adjacent block can be fitted with a fixed flat thrust surface, either as an inlay or as a fixed thrust element secured into a conical recess.

Description

Technisches GebietTechnical area

Die vorliegende Erfindung betrifft eine Bindung von Laufschaufeln einer Turbomaschine mit den Merkmalen des Oberbegriffs des Anspruchs 1.The present invention relates to a binding of blades of a turbomachine with the features of the preamble of claim 1.

Stand der TechnikState of the art

Aus DE 35 17 283 C2 ist eine Laufschaufelbindung der eingangs genannten Art bekannt, bei der Ansätze vorgesehen sind, die sich in Umfangsrichtung erstrecken, paarweise mit einer Laufschaufel starr verbunden sind und sich jeweils über wenigstens einen Druckkörper an dem in Umfangsrichtung benachbarten Ansatz abstützen. Dabei weist jeder Druckkörper an einer dem zugehörigen A n-satz zugewandten Halteseite eine Haltekontur auf, die in eine am zugehörigen Ansatz ausgebildete Aufnahme hineinragt und sich darin in Umfangsrichtung und quer dazu abstützt. Des weiteren weist jeder Druckkörper an einer dem benachbarten Ansatz zugewandten Stützseite eine ebene Stützfläche auf, die sich an einer dem benachbarten Ansatz zugeordneten ebenen Gegenstützfläche flächig abstützt. Bei der bekannten Laufschaufelbindung sind die Haltekonturen der Druckkörper jeweils als Konus ausgebildet. Die zugehörigen Aufnahmen sind ebenfalls als Konus ausgebildet, wobei der Konus der Haltekontur jedoch eine andere Konizität aufweist als der Konus der Aufnahme. Hierdurch wird erreicht, dass Fertigungstoleranzen der Sitzfläche und der Druckkörper durch geringfügige plastische Verformungen am äußeren Rand der Konusaufnahme und der Konushaltekontur ausgeglichen werden können. Die Gegenstützfläche, an welcher sich die Stützfläche des Druckkörpers abstützt, kann bei einer Weiterbildung der bekannten Laufschaufelbindung durch die Stützfläche eines Gegendruckkörpers gebildet sein, der mit dem Druckkörper baugleich ist.From DE 35 17 283 C2 is a blade binding of the type mentioned are known, are provided in the approaches that extend in the circumferential direction, in pairs are rigidly connected to a blade and each one via at least one pressure body at the circumferentially adjacent Support the approach. In this case, each pressure body at one of the associated A n-set facing holding side on a holding contour, in one of the associated Approach trained receptacle protrudes and in it in the circumferential direction and transversely supported. Furthermore, each pressure body at one of the adjacent Approach facing support side on a flat support surface, which adjoins one of the adjacent approach associated flat counter-support surface area supported. In the known blade binding, the retaining contours of the Pressure body each formed as a cone. The associated shots are also formed as a cone, wherein the cone of the retaining contour, however, a has conicity other than the taper of the receptacle. This will achieve that manufacturing tolerances of the seat and the pressure hull by minor plastic deformations on the outer edge of the cone holder and the Konushaltekontur can be compensated. The counter support surface on which the support surface of the pressure body is supported, in a development of the known Blade binding through the support surface of a counter-pressure body be formed, which is identical to the pressure hull.

Die bekannte Laufschaufelbindung funktioniert optimal, wenn im Betrieb der Turbomaschine ausschließlich Relativbewegungen auftreten, die parallel zur Stützfläche verlaufen. Die Stützfläche kann dann an der Gegenstützfläche abgleiten. In der Praxis treten jedoch nicht nur parallel geführte Relativbewegungen zwischen den aneinander abzustützenden bzw. miteinander zu verbindenden Ansätzen auf. Insbesondere beim Hochfahren einer Turbine oder bei bestimmten Schwachlast-Betriebsphasen, z.B. während der Ventilation in der letzten Turbinenstufe, kann es zu Verwindungen und Verdrehungen der Laufschaufeln und somit der Ansätze kommen, was insbesondere zu einer verstärkten Schwi n-gungsbeanspruchung der Schaufelbindung führt. Drehbewegungen zwischen den Ansätzen führen jedoch zu einer Linien- oder Punktbelastung der jeweiligen Druckkörperaufnahme, was zu einem Sprödbruch des harten Druckkörpers bzw. zur Anrissbildung des Druckkörpersitzes führen kann.The known blade binding works optimally when in operation of the turbomachine Only relative movements occur that are parallel to the support surface run. The support surface can then slide on the mating support surface. In practice, however, not only parallel guided relative movements between the approaches to be supported or linked to each other on. Especially when starting a turbine or certain Low load operating phases, e.g. during the ventilation in the last turbine stage, There may be twisting and twisting of the blades and Thus, the approaches come, which in particular to an increased swing n-gungsbeanspruchung the blade binding leads. Rotational movements between the However, approaches lead to a line or point load of the respective Pressure body, resulting in a brittle fracture of the hard pressure body or can lead to cracking of the pressure body seat.

Darstellung der ErfindungPresentation of the invention

Der Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, liegt die Aufgabe zugrunde, für eine Laufschaufelbindung der eingangs genannten Art eine verbesserte Ausführungsform anzugeben, die es erlaubt, Fertigungstoleranzen, Spiele, elastische Verformung und ähnliche Faktoren ausschliesslich durch eine Gleitbewegung auszugleichen.The invention, as characterized in the claims, the object is underlying, for a blade binding of the type mentioned an improved Specify an embodiment that allows manufacturing tolerances, games, elastic deformation and similar factors exclusively by a sliding movement compensate.

Erfindungsgemäß wird diese Aufgabe durch den Gegenstand des unabhängigen Anspruchs gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche. According to the invention, this object is achieved by the subject matter of the independent patent Claim solved. Advantageous embodiments are the subject of the dependent Claims.

Die Erfindung beruht auf dem allgemeinen Gedanken, die Haltekontur des Druckkörpers und die Kontur der zugehörigen Aufnahme als komplementäre Kugelabschnitte auszubilden. Durch diese Bauweise wird zum einen erreicht, dass der Druckkörper flächig am zugehörigen Ansatz abgestützt ist. Zum anderen wird durch diese Maßnahme eine Kugelkopflagerung des Druckkörpers am zugehörigen Ansatz ausgebildet, die es dem Druckkörper ermöglicht, seine Stützfläche um den Kugelmittelpunkt zu drehen. Im Falle von grösseren Einstelldrehbewegungen der Ansätze bzw. der Laufschaufeln, zum Beispiel während des Hochfahrens auf Nenndrehzahl, können die drehbar gelagerten Druckkörper diese Relativbewegungen ausgleichen, so dass stets eine flächige Kraftübertragung zwischen den aneinander abgestützten bzw. miteinander verbundenen Ansätzen erzielbar ist. Sich ändernde Winkellagen der Laufschaufeln bzw. der Ansätze bewirken bei der erfindungsgemäßen Laufschaufelbindung eine selbsttätige Einstellung der beweglich gelagerten Druckkörper. Spannungsspitzen werden dadurch vermieden. Im Betrieb bei Nenndrehzahl kommt dagegen die Reibdämpfung durch die flächige Anlage voll zur Geltung. Es entstehen keine hochfrequenten Kippbewegungen.The invention is based on the general idea, the holding contour of the Pressure body and the contour of the associated recording as complementary ball sections train. By this construction is achieved on the one hand, that the pressure body is supported flat on the associated approach. The other is by this measure, a ball head bearing of the pressure hull on the associated Approach formed, which allows the pressure body, its support surface to turn the ball center. In case of larger adjustment turning movements the lugs or the blades, for example during startup At rated speed, the rotatably mounted pressure body these relative movements compensate, so that always a two-dimensional force transmission between the mutually supported or interconnected approaches is achievable. To cause changing angular positions of the blades or the lugs in the blade binding according to the invention an automatic adjustment the movably mounted pressure hull. Stress peaks are thereby avoided. In operation at rated speed, however, comes the friction damping due to the extensive plant to full advantage. There are no high-frequency Tilting movements.

Bei einer bevorzugten Ausführungsform weist der Kugelabschnitt der Haltekontur einen Kugelmittelpunkt auf, während die Stützfläche kreisförmig ist und einen Kreismittelpunkt besitzt. Der Druckkörper ist dann so gestaltet, dass eine Gerade, die sich sowohl durch den Kreismittelpunkt als auch durch den Kugelmittelpunkt erstreckt, senkrecht auf der Stützflächenebene steht. Mit anderen Worten, der Druckkörper ist bezüglich dieser Geraden rotationssymmetrisch aufgebaut. Durch diese Ausgestaltung können quasi beliebig räumlich orientierte Drehungen und Verwindungen der Ansätze bzw. der Laufschaufeln ausgeglichen werden.In a preferred embodiment, the ball portion of the retaining contour a ball center, while the support surface is circular and a Center of the circle has. The pressure body is then designed so that a straight line, extending through both the center of the circle and the center of the sphere extends, is perpendicular to the support surface plane. In other words, the Pressure body is constructed rotationally symmetrical with respect to this line. By This configuration can virtually arbitrary spatially oriented rotations and Twists of the lugs or the blades are compensated.

Die Gegenstützfläche, die dem benachbarten Ansatz zugeordnet ist und an welcher sich die Stützfläche des Druckkörpers flächig abstützt, kann beispielsweise direkt an der Stirnseite des benachbarten Ansatzes ausgebildet sein. The mating support surface associated with the adjacent lug and on which For example, the support surface of the pressure hull is supported flat be formed directly on the front side of the adjacent approach.

Alternativ kann diese Gegenstützfläche an einen Widerlagerelement ausgebildet sein, das an einer Stirnseite des benachbarten Ansatzes befestigt ist.
Ebenso ist es möglich, die Gegenstützfläche durch die Stützfläche eines Gegendruckkörpers zu bilden, der am benachbarten Ansatz gehaltert ist. Grundsätzlich können Druckkörper und Gegendruckkörper baugleich sein. Bevorzugt wird jedoch eine Ausführungsform, bei welcher der Gegendruckkörper bezüglich der Normalenrichtung seiner Gegenstützfläche keine Taumelbewegungen durchführen kann. Auf diese Weise werden sämtliche Ausgleichsbewegungen ausschließlich von dem kugelgelagerten Druckkörper durchgeführt. Hierdurch wird erreicht, dass sich der bewegliche Druckkörper bei entsprechenden Verdrehungen der Ansätze immer wieder von selbst in seine Ausgangslage zurück verstelltAlternatively, this counter support surface may be formed on an abutment member which is fixed to an end face of the adjacent approach.
It is also possible to form the counter support surface by the support surface of a counter-pressure body, which is supported on the adjacent approach. In principle, the pressure body and counterpressure body can be identical. However, preference is given to an embodiment in which the counter-pressure body can not carry out tumbling movements with respect to the normal direction of its counter-support surface. In this way, all compensatory movements are performed exclusively by the ball-bearing pressure body. This ensures that the movable pressure body with appropriate twists of the approaches again and again adjusted by itself to its original position

Für den Gegendruckkörper wird eine Variante bevorzugt, bei welcher sowohl die Haltekontur des Gegendruckkörpers als auch die zugehörige Aufnahme als Konus bzw. als Kegelstumpf ausgebildet sind, wobei beide Kegelstümpfe dieselbe Konizität besitzen. Auf diese Weise kommt es zum einen zur einer flächigen Anlage des Gegendruckkörpers am zugehörigen Ansatz. Zum anderen ist der Gegendruckkörper bezüglich seiner Längsmittelachse starr am Ansatz fixiert und kann dadurch als Widerlager für den sich daran abstützenden Druckkörper dienen.For the counter-pressure body, a variant is preferred in which both the Holding contour of the counter-pressure body and the associated recording as a cone or formed as a truncated cone, both truncated cones are the same Possess conicity. In this way, on the one hand, there is a two-dimensional system the counter-pressure body at the associated approach. On the other hand, the counter-pressure body fixed with respect to its longitudinal central axis rigidly at the neck and can serve as an abutment for the pressure body supported thereon.

Weitere wichtige Merkmale und Vorteile der erfindungsgemäßen Laufschaufelbindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Further important features and advantages of the rotor blade binding according to the invention emerge from the subclaims, from the drawings and from the associated figure description with reference to the drawings.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile beziehen. Es zeigen jeweils schematisch,

Fig. 1a, 1b
je eine Draufsicht auf einen Schaufelkranzausschnitt im Außerbetriebszustand (1a) und im Betriebszustand (1b),
Fig. 2
einen Schnitt gemäß einer Schnittlinie II - II in Fig. 1b durch zwei miteinander verbundene Ansätze,
Fig. 3
eine Schnittansicht wie in Fig. 2, jedoch bei einer anderen Ausführungsform,
Fig. 4
eine Schnittansicht wie in Fig. 2, jedoch bei einer weiteren Ausfü hrungsform.
Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components. Each show schematically,
Fig. 1a, 1b
each a plan view of a blade ring cut-out in the inoperative state (1a) and in the operating state (1b),
Fig. 2
3 a section according to a section line II - II in FIG. 1b through two interconnected approaches,
Fig. 3
3 a sectional view as in FIG. 2, but in another embodiment,
Fig. 4
a sectional view as in Fig. 2, but in a further embodiment.

Wege zur Ausführung der ErfindungWays to carry out the invention

Entsprechend den Fig. 1a und 1b sind Laufschaufeln 1 einer im übrigen nicht gezeigten Turbomaschine jeweils mit zwei, auf verschiedenen Seiten des Schaufelblatts liegenden Ansätzen 2 ausgestattet. Diese Ansätze 2 erstrecken sich dabei in einer durch einen Pfeil angedeuteten Umfangsrichtung 3, in welcher die Laufschaufeln 1 im Betrieb der Turbomaschine umlaufen. Die Ansätze 2 sind starr mit der jeweiligen Laufschaufel 1 verbunden und können insbesondere einen integralen Bestandteil der jeweiligen Laufschaufel 1 bilden. Zweckmäßig sind die Ansätze 2 in Form von Stützflügeln ausgestaltet, die strömungsgünstige Profile besitzen und in der Regel zwischen den radialen Enden der Laufschaufeln 1 angeordnet sind. Grundsätzlich können die Ansätze 2 aber auch als Deckplatten oder Deckbänder ausgestaltet sein, die an den radial außen liegenden Enden der Laufschaufeln 1 angeordnet sind. Grundsätzlich können die Ansätze 2 auch andere Bindungselemente sein. According to FIGS. 1a and 1b, rotor blades 1 are otherwise not shown Turbomachine each with two, on different sides of the airfoil lying approaches 2 equipped. These approaches 2 extend in a direction indicated by an arrow circumferential direction 3, in which the blades 1 circulating in the operation of the turbomachine. The lugs 2 are rigid with the respective blade 1 and in particular an integral Part of the respective blade 1 form. The approaches are useful 2 designed in the form of support wings, which have aerodynamic profiles and usually disposed between the radial ends of the blades 1 are. Basically, the approaches 2 but also as cover plates or Shrouds be designed, which at the radially outer ends of the Blades 1 are arranged. Basically, the approaches 2 and others Be binding elements.

Im Außerbetriebszustand gemäß Fig. 1a ist in Umfangsrichtung 3 zwischen ei n-ander zugewandten Stirnseiten 4 benachbarter Ansätze 2 ein Spalt 5 ausgebildet. Im Betriebszustand gemäß Fig. 1b bewirken die Fliehkräfte eine Entwindung der Laufschaufeln 1 entsprechend einem in Fig. 1a eingetragenen Pfeil 6, wodurch sich der Spalt 5 schließt.In the inoperative state of FIG. 1a is in the circumferential direction 3 between egg n-ander facing end faces 4 adjacent lugs 2 a gap 5 is formed. In the operating state of FIG. 1b, the centrifugal forces cause a Entwindung of the blades 1 corresponding to a registered in Fig. 1a arrow 6, thereby the gap 5 closes.

Abweichend von den Fig. 1a und 1b stützen sich die Ansätze 2 jedoch an ihren Stirnseiten 4 nicht direkt aneinander ab, sondern indirekt jeweils über wenigstens einen Druckkörper 7 (vgl. die Fig. 2 bis 4). Diese Druckkörper 7 sind jedoch zur Vereinfachung der Darstellung in den Fig. 1a und 1b nicht wiedergegeben.Notwithstanding FIGS. 1a and 1b, however, the lugs 2 are based on their End faces 4 not directly from each other, but indirectly each at least over a pressure body 7 (see Figures 2 to 4). However, these pressure bodies 7 are not shown to simplify the illustration in FIGS. 1a and 1b.

In den Schnittansichten der Fig. 2 bis 4 sind jeweils die einander gegenüberliegenden Endabschnitte eines Paars von Ansätzen 2, die sich zumindest im Betrieb der Turbomaschine aneinander abstützen, geschnitten wiedergegebenen, während der in diesem Bereich angeordnete Druckkörper 7 nicht geschnitten dargestellt ist. Es ist klar, dass die Schnittdarstellung der Fig. 2 bis 4 auch einem Schnitt entsprechen können, der um die Schnittlinie II in der Zeichnungsebene der Fig. 1b um 90° gedreht ist.In the sectional views of Figs. 2 to 4 are each the opposite End portions of a pair of lugs 2, at least in operation support the turbomachine against each other, cut reproduced, during the arranged in this area pressure body 7 is not cut is shown. It is clear that the sectional view of Figs. 2 to 4 also a Can correspond to the section around the section line II in the plane of the drawing Fig. 1b is rotated by 90 °.

Entsprechend den Fig. 2 bis 4 besitzt jeder Druckkörper 7 eine kugelförmige Halteseite 8 und eine ebene Stützseite 9. Während die Halteseite 8 demjenigen Ansatz 2 zugewandt ist, dem der jeweilige Druckkörper 7 zugeordnet ist (gemäß den Fig. 2 bis 4 jeweils der rechte Ansatz 2), ist die Stützseite 9 dem in Umfangsrichtung 3 benachbarten Ansatz 2 zugewandt (also gemäß den Fig. 2 bis 4 jeweils dem linken Ansatz 2). An der Halteseite 8 ist eine ab- oder vorstehende Haltekontur 10 ausgebildet. Der Ansatz 2, dem der Druckkörper 7 zugeordnet ist, weist an seiner Stirnseite 4 eine Aufnahme 11 auf, in welche die Haltekontur 10 des Druckkörpers 7 eingesetzt ist. Die Haltekontur 10 ragt somit in die Aufnahme 11 hinein und kann sich darin in Umfangsrichtung 3 sowie quer zur Umfangsrichtung 3 abstützen. Erfindungsgemäß ist nun die Haltekontur 10 als Kugelabschnitt ausgebildet. Komplementär dazu ist auch die Aufnahme 11 ebenfalls als Kugelabschnitt ausgebildet. Die Kugelabschnitte besitzen dabei denselben Radius R, wodurch der Kugelabschnitt der Haltekontur 10 flächig am Kugelabschnitt der Aufnahme 11 zur Anlage kommt. Gleichzeitig bildet der erfindungsgemäße Druckkörper 7 dadurch eine Art Kugelgelenk, das in einer Gelenkpfanne um einen Kugelmittelpunkt 12 beweglich am zugehörigen Ansatz 2 gelagert ist. Die Gelenkpfanne wird hierbei durch die Aufnahme 11 gebildet. Zur Optimierung des Spannungszustands im Kontaktbereich können die Radien von Druckkörper 7 und Aufnahme 11 auch geringfügig voneinander abweichen.According to FIGS. 2 to 4, each pressure body 7 has a spherical Holding side 8 and a flat support side 9. While the holding side 8 that Approach approach 2, which the respective pressure body 7 is assigned (according to 2 to 4 each of the right approach 2), the support side 9 is the one in the circumferential direction 3 adjacent approach 2 facing (ie according to FIGS. 2 to 4, respectively the left approach 2). On the holding side 8 is a down or protruding Holding contour 10 is formed. The approach 2, which is associated with the pressure body 7, has on its front side 4 a receptacle 11, in which the holding contour 10th the pressure body 7 is inserted. The holding contour 10 thus projects into the receptacle 11 in and can be in it in the circumferential direction 3 and transverse to the circumferential direction Support 3. According to the invention, the retaining contour 10 is now a ball section educated. Complementary to this is the recording 11 also as Ball section formed. The ball sections have the same radius R, whereby the ball portion of the retaining contour 10 flat on the ball portion the recording 11 comes to rest. At the same time forms the inventive Pressure body 7 thereby a kind of ball joint, in a joint socket around a Ball center 12 is movably mounted on the associated approach 2. The The socket is formed by the receptacle 11. To optimize the Stress state in the contact area, the radii of pressure hull. 7 and recording 11 also differ slightly.

Des weiteren besitzt der Druckkörper 7 an seiner Stützseite 9 eine ebene Stützfläche 13. Wie aus den Fig. 2 bis 4 hervorgeht, stützt sich der Druckkörper 7 zumindest im Betrieb der Turbomaschine mit seiner Stützfläche 13 an einer Gegenstützfläche 14 ab, die dem benachbarten Stützflügel 2 zugeordnet ist. Auch die Gegenstützfläche 14 ist eben ausgestaltet, so dass die Stützflächen 13 und 14 flächig aneinander anliegen.Furthermore, the pressure body 7 has on its support side 9 a flat support surface 13. As is apparent from FIGS. 2 to 4, the pressure body 7 is supported at least during operation of the turbomachine with its support surface 13 on a mating support surface 14, which is assigned to the adjacent support wing 2. Also the Counter support surface 14 is configured just so that the support surfaces 13 and 14 lie flat against each other.

Wie aus den Fig. 2 bis 4 entnehmbar ist, kann der erfindungsgemäße Druckkörper 7 zwischen den miteinander verbundenen Ansätzen 2 vergleichsweise große Kräfte F in Umfangsrichtung 3 übertragen. Darüber hinaus können durch die Reibung auch Koppelmomente M zwischen benachbarten Laufschaufeln 1 über die miteinander verbundenen Ansätze 2 übertragen werden. Auf Grund der bewegichen Lagerung des Druckkörpers 7 am zugehörigen Ansatz 2 können außerdem Drehverstellungen oder Verwindungen zwischen benachbarten Laufschaufeln 1 bzw. zwischen aneinander abgestützten Ansätzen 2 ausgeglichen werden. Durch die vorgeschlagene Lagerung des Druckkörpers 7 bleibt dabei die flächige Anlage zwischen den Stützflächen 13 und 14 erhalten, ebenso wie die flächige Anlage zwischen der Haltekontur 10 und der Aufnahme 11.As can be seen from FIGS. 2 to 4, the pressure body according to the invention 7 between the interconnected lugs 2 comparatively large Transfer forces F in the circumferential direction 3. In addition, due to friction also coupling moments M between adjacent blades 1 over the interconnected approaches 2 are transmitted. Because of the moving Storage of the pressure hull 7 on the associated approach 2 can also Rotary adjustments or twists between adjacent blades 1 or between mutually supported approaches 2 are compensated. By the proposed storage of the pressure hull 7 remains the area conditioning obtained between the support surfaces 13 and 14, as well as the surface conditioning between the retaining contour 10 and the receptacle 11.

Die erfindungsgemäße Laufschaufelbindung kann somit die im Betrieb, vor allem beim An- und Abfahren, möglicherweise anfallenden Drehbewegungen und unterschiedlichen Winkelstellungen der Ansätze 2 ausgleichen, ohne dass es dabei zu größeren elastischen oder sogar zu plastischen Verformungen kommt.The blade binding according to the invention can thus be used during operation, above all when starting and stopping, possibly occurring rotational movements and different Balancing angular positions of the approaches 2, without it comes to greater elastic or even plastic deformation.

Die Geometrie des Stützkörpers 7 ist zweckmäßig so gewählt, dass die Stützfläche 13 kreisförmig ausgestaltet ist und einen Kreismittelpunkt 15 besitzt. Die kugelförmige Haltekontur 10 ist dabei so auf die ebene Stützfläche 13 abgestimmt, dass eine Gerade 16, die sowohl durch den Kreismittelpunkt 15 als auch durch den Kugelmittelpunkt 12 verläuft, senkrecht auf der Ebene der Stützfläche 13 steht. Hierdurch ergibt sich eine Rotationssymmetrie für den Druckkörper 7, so dass die hierdurch erzielte Lagerung in allen Raumrichtungen gleichsam wirkt.The geometry of the support body 7 is suitably chosen so that the support surface 13 is configured circular and has a circle center 15. The spherical one Holding contour 10 is matched to the flat support surface 13, that a straight line 16, through both the center of the circle 15 and through the ball center 12 extends perpendicular to the plane of the support surface 13th stands. This results in a rotational symmetry for the pressure body 7, so that the storage achieved in this way acts as it were in all spatial directions.

Bei der Ausführungsform gemäß Fig. 2 ist die Gegenstützfläche 14 unmittelbar an der Stirnseite 4 des benachbarten Ansatzes 2 ausgebildet.In the embodiment according to FIG. 2, the counter support surface 14 is instantaneous formed on the front side 4 of the adjacent approach 2.

Alternativ dazu kann gemäß der in Fig. 3 gezeigten Ausführungsform die Gegenstützfläche 14 auch an einem speziellen Widerlagerelement 17 ausgebildet sein. Dieses Widerlagerelement 17 ist an der Stirnseite 4 des benachbarten Ansatzes 2 befestigt, insbesondere durch Löten oder Schweißen. Bei der hier gezeigten Ausführungsform ist das Widerlagerelement 17 als Platte ausgestaltet, die in die Stirnseite 4 des benachbarten Ansatzes 2 eingesetzt und darin versenkt angeordnet ist.Alternatively, according to the embodiment shown in Fig. 3, the counter support surface 14 may also be formed on a special abutment element 17. This abutment element 17 is on the front side 4 of the adjacent approach 2 fixed, in particular by soldering or welding. At the shown here Embodiment, the abutment member 17 is designed as a plate which in the Inserted end face 4 of the adjacent approach 2 and arranged sunk therein is.

Entsprechend der in Fig. 4 gezeigten Ausführungsform kann die Gegenstützfläche 14 jedoch auch an einem Gegendruckkörper 18 ausgebildet sein. Hierbei handelt es sich im wesentlichen um die in DE 3517283 dargelegte Bauform. Der Gegendruckkörper 18 besitzt - ebenso wie der Druckkörper 7 - eine Stützseite 19 mit einer ebenen Stützfläche, welche die Gegenstützfläche 14 bildet. Desweiteren ist auch der Gegendruckkörper 18 mit einer Halteseite 20 ausgestattet, an der eine Haltekontur 21 ausgebildet ist. Auch die Haltekontur 21 des Gegendruckkörpers 18 ist in eine entsprechende Aufnahme 22 eingesetzt, die im benachbarten Ansatz 2 ausgebildet ist. Die Formgebung der Haltekontur 21 des Gegendruckkörpers 18 und die damit zusammenwirkende Aufnahme 22 sind dabei so aufeinander abgestimmt, dass die Gegenstützfläche 14 des Gegendruckkörpers 18 relativ zum zugehörigen Ansatz 2 räumlich fixiert ist. Erreicht wird dies hier dadurch, dass die Haltekontur 21 als Konus ausgebildet ist, während passend dazu auch die zugehörige Aufnahme 22 als Konus ausgestaltet ist, der die selbe Konizität wie der Konus der Haltekontur 21 besitzt. Folglich liegt die Haltekontur 21 des Gegendruckkörpers 18 flächig an der Aufnahme 22 an. Zwar ist es grundsätzlich noch möglich, den Gegendruckkörper 18 um seine Längsmittelachse zu drehen, jedoch bleibt dabei die Ebene seiner Gegenstützfläche 14 relativ zum zugehörigen Ansatz 2 invariant.According to the embodiment shown in Fig. 4, the counter support surface 14, however, also be formed on a counterpressure body 18. in this connection It is essentially the design set out in DE 3517283. Of the Back pressure body 18 has - as well as the pressure body 7 - a support side 19 with a flat support surface which forms the counter support surface 14. Furthermore is also the counter-pressure member 18 equipped with a holding side 20 at a holding contour 21 is formed. Also, the retaining contour 21 of the counter-pressure body 18 is inserted into a corresponding receptacle 22 which in the adjacent Approach 2 is formed. The shape of the retaining contour 21 of the Back pressure body 18 and the cooperating receptacle 22 are there coordinated so that the counter-support surface 14 of the counter-pressure body 18 is fixed relative to the associated approach 2 spatially. This is achieved here by the fact that the retaining contour 21 is formed as a cone while fitting to the associated receptacle 22 is designed as a cone, the has the same conicity as the cone of the retaining contour 21. Consequently, the holding contour lies 21 of the counter-pressure member 18 flat against the receptacle 22 at. Although it is basically still possible, the counter-pressure member 18 about its longitudinal central axis to rotate, however, while the plane of its counter-support surface 14 remains relative to the associated approach 2 invariant.

Um die ebenen Stützflächen 13 der Druckkörper 7 und die damit zusammenwirkenden Gegenstützflächen 14 vor Verschleiß zu schützen, können die Stützflächen 13 und/oder die Gegenstützflächen 14 mit einer reibungsarmen Beschichtung versehen sein (nicht dargestellt). Gleichzeitig können durch diese Maßnahme die in der Ebene der Stützflächen 13 bzw. der Gegenstützflächen 14 auftretenden Reibungskräfte reduziert werden.To the flat support surfaces 13 of the pressure body 7 and the cooperating Support surfaces 14 to protect against wear, the support surfaces 13 and / or the counter support surfaces 14 with a low-friction coating be provided (not shown). At the same time can by this measure in the plane of the support surfaces 13 and the counter support surfaces 14 occurring Frictional forces are reduced.

Zusätzlich oder alternativ kann zur Verschleißreduzierung vorgesehen sein, die Druckkörper 7 bzw. die Gegendruckkörper 18 zumindest in einem die Stützfläche 13 bzw. die Gegenstützfläche 14 aufweisenden Abschnitt aus einem geeigneten Hartmetall auszubilden. Ebenso kann das Widerlagerelement 17 gemäß Fig. 3 aus einem geeigneten Hartmetall hergestellt sein. Additionally or alternatively may be provided to reduce wear, the Pressure element 7 and the counter-pressure element 18 at least in a support surface 13 or the counter support surface 14 having portion of a suitable To form carbide. Likewise, the abutment element 17 according to FIG. 3 be made of a suitable carbide.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Laufschaufelblade
22
Ansatz/StützflügelApproach / support wings
33
Umfangsrichtungcircumferentially
44
Stirnseite von 2Front side of 2
55
Spaltgap
66
Momentmoment
77
Druckkörperpressure vessels
88th
Halteseite von 7Holding side of 7
99
Stützseite von 7Support side of 7
1010
Haltekontur von 8Holding contour of 8
1111
Aufnahmeadmission
1212
KugelmittelpunktBall center
1313
Stützfläche von 9Support surface of 9
1414
GegenstützflächeAgainst support surface
1515
KreismittelpunktCircle center
1616
GeradeJust
1717
WiderlagerelementAbutment member
1818
GegendruckkörperPilot head
1919
Stützseite von 18Support side of 18
2020
Halteseite von 18Holding side of 18
2121
Haltekontur von 20Holding contour of 20
2222
Aufnahmeadmission
RR
Radiusradius
FF
Kraftforce
MM
Kopplungsmomentcouple moment

Claims (6)

Bindung von Laufschaufeln (1) einer Turbomaschine, mit Ansätzen (2), die sich in Umfangsrichtung (3) erstrecken, paarweise mit einer Laufschaufel (1) starr verbunden sind und sich zumindest im Betrieb der Turbomaschine jeweils über wenigstens einen Druckkörper (7) am in Umfangsrichtung (3) benachbarten Ansatz (2) abstützen, wobei jeder Druckkörper (7) an einer dem zugehörigen Ansatz (2) zugewandten Halteseite (8) eine Haltekontur (10) aufweist, die in eine am zugehörigen Ansatz (2) ausgebildete Aufnahme (11) hineinragt und sich darin in Umfangsrichtung (3) und quer dazu abstützt, wobei jeder Druckkörper (7) an einer dem benachbarten Ansatz (2) zugewandten Stützseite (9) eine ebene Stützfläche (13) aufweist, die sich zumi n-dest im Betrieb der Turbomaschine an einer dem benachbarten Ansatz (2) zugeordneten ebenen Gegenstützfläche (14) flächig abstützt, dadurch gekennzeichnet, dass jedem Paar sich aneinander abstützender Ansätze (2) mindestens ein Druckkörper (7) zugeordnet ist, dessen Haltekontur (10) als Kugelabschnitt ausgebildet ist, wobei die zugehörige Aufnahme (11) ebenfalls als Kugelabschnitt ausgebildet ist, deren Radius (R) wenigstens annähernd gleich groß ist wie der Radius (R) des Kugelabschnitts der Haltekontur (10). Binding of blades (1) of a turbomachine, with lugs (2) extending in the circumferential direction (3), in pairs with a blade (1) are rigidly connected and at least during operation of the turbomachine via at least one pressure body (7) on in the circumferential direction (3) adjacent approach (2) support, wherein each pressure body (7) at a the associated approach (2) facing holding side (8) has a holding contour (10) which projects into a receptacle (11) formed on the associated approach (2) and therein in the circumferential direction (3) and supported transversely to wherein each pressure body (7) has a planar support surface (13) on a support side (9) facing the adjacent projection (2), which at least during operation of the turbomachine at a planar counter-support surface (14) assigned to the adjacent projection (2) ) is supported flatly, characterized, in that at least one pressure element (7) is assigned to each pair of projections (2) which are supported on one another and whose retaining contour (10) is formed as a spherical section, wherein the associated receptacle (11) is also formed as a ball portion whose radius (R) is at least approximately equal to the radius (R) of the ball portion of the retaining contour (10). Laufschaufelbindung nach Anspruch 1,
dadurch gekennzeichnet, dass die Gegenstützfläche (14) direkt an einer Stirnseite (4) des benachbarten Ansatzes (2) ausgebildet ist. Blade binding according to claim 1,
characterized in that the counter-support surface (14) is formed directly on an end face (4) of the adjacent projection (2). Laufschaufelbindung nach Anspruch 1,
dadurch gekennzeichnet, dass die Gegenstützfläche (14) durch die Stützfläche eines Gegendruckkörpers (18) gebildet ist, der mit seiner Haltekontur (21) in eine im benachbarten Ansatz (2) ausgebildete Aufnahme (22) hineinragt.Blade binding according to claim 1,
characterized in that the counter-support surface (14) by the support surface of a counter-pressure body (18) is formed, which protrudes with its holding contour (21) in an adjacent projection (2) formed receptacle (22). Laufschaufelbindung nach Anspruch 3,
dadurch gekennzeichnet, dass die Haltekontur (21) des Gegendruckkörpers (18) als Konus ausgebildet ist, wobei die zugehörige Aufnahme (22) ebenfalls als Konus ausgebildet ist, dessen Konizität gleich groß ist wie die Konizität des Konus der Haltekontur (21).Blade binding according to claim 3,
characterized in that the retaining contour (21) of the counter-pressure body (18) is formed as a cone, wherein the associated receptacle (22) is also formed as a cone whose conicity is the same size as the taper of the cone of the retaining contour (21). Laufschaufelbindung nach Anspruch 1,
dadurch gekennzeichnet, dass die Gegenstützfläche (14) an einem Widerlagerelement (17) ausgebildet ist, das an einer Stirnseite (4) des benachbarten Ansatzes (2) befestigt ist.Blade binding according to claim 1,
characterized in that the counter-support surface (14) is formed on an abutment element (17) which is fixed to an end face (4) of the adjacent projection (2). Laufschaufelbindung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass die Stützfläche (13) und/oder die Gegenstützfläche (14) reibungsarm und verschleissfest ausgeführt ist/sind.Blade binding according to one of claims 1 to 5,
characterized in that the support surface (13) and / or the counter-support surface (14) is designed low-friction and wear resistant / are.
EP04104236.7A 2003-09-12 2004-09-02 Blade to blade connection in a turbomachine Not-in-force EP1515001B1 (en)

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DE10342207A DE10342207A1 (en) 2003-09-12 2003-09-12 Blade binding of a turbomachine

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US20050111983A1 (en) 2005-05-26
US7140841B2 (en) 2006-11-28
JP2005090506A (en) 2005-04-07
EP1515001A3 (en) 2012-07-04
ZA200407296B (en) 2005-08-31
CN100374688C (en) 2008-03-12
DE10342207A1 (en) 2005-04-07
EP1515001B1 (en) 2016-11-09
CN1594841A (en) 2005-03-16

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