EP2157283A1 - Blade attachment with damping element for a fluid flow engine - Google Patents
Blade attachment with damping element for a fluid flow engine Download PDFInfo
- Publication number
- EP2157283A1 EP2157283A1 EP08014644A EP08014644A EP2157283A1 EP 2157283 A1 EP2157283 A1 EP 2157283A1 EP 08014644 A EP08014644 A EP 08014644A EP 08014644 A EP08014644 A EP 08014644A EP 2157283 A1 EP2157283 A1 EP 2157283A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- friction means
- mounting according
- recess
- foot mounting
- 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.)
- Withdrawn
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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
- F01D5/26—Antivibration means not restricted to blade form or construction or to blade-to-blade connections or to the use of particular materials
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- 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
- F05D2240/00—Components
- F05D2240/80—Platforms for stationary or moving blades
-
- 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 invention relates to a blade attachment comprising a rotor provided with Schaufelfußnuten and at least one blade comprising a blade root and a Schaufelfußplatte, wherein the blade is designed for installation in the Schaufelfußnut.
- a steam turbine as an exemplary embodiment of a turbomachine essentially comprises a rotor which is rotatably mounted and a housing arranged around the rotor.
- the turbine blades are placed in so-called grooves in the rotor.
- grooves there are various Nutenformen known, such as the so-called T-shape or the Christmas tree groove.
- the blade roots are inserted into these grooves and, in use, are urged radially outwards by the centrifugal force, creating contact surfaces between the grooves and the blade roots.
- the turbine blades may oscillate during operation. On the one hand, such vibrations lead to flow losses and, on the other hand, also lead to material fatigue. It would be desirable to have an improved turbine blade attachment where blade vibration is minimized.
- the invention begins, whose task is to provide a blade attachment, are reduced in the vibrations.
- a blade attachment comprising a rotor provided with Schaufelfußnuten and at least one blade comprising a blade root and a Schaufelfußplatte, wherein the blade is designed for installation in the Schaufelfußnut, wherein the rotor has a recess, in which a friction means is arranged is pressed by a centrifugal force occurring during operation against the blade root plate.
- the friction means is arranged in the recess before the blade is installed in the blade root groove.
- the recess is in this case a little larger than the size of the friction means, whereby it is possible to insert the blade root in the Schaufelfußnut.
- the recess is designed as a bore.
- a bore is a comparatively quick and inexpensive way to make a recess.
- the friction means is formed as a pin, wherein the pin has a slightly smaller diameter than the bore.
- the friction means can be moved freely in the bore.
- there is then the possibility that the friction means is pressed against the blade base plate as a result of a centrifugal force acting in operation in the bore.
- the recess is made oblique with respect to the radial direction. Due to the oblique arrangement of the friction means in the obliquely arranged recess prevail frictional forces with which the vibration of a blade can be effectively damped.
- the friction means clamps in the recess against the blade root plate.
- the system of friction means, recess and blade root plate forms a rigid system. Disturbing vibrations are reduced by the rigid system.
- the recess is designed at an angle of 45 °.
- the recess may advantageously also be between 35 ° and 55 °, between 30 ° and 60 °, between 40 ° and 50 ° and between 25 ° and 75 °.
- the choice of angle depends on the coefficients of friction of the material of the rotor and the material of the friction means and the material of the blade root.
- the recess is arranged on a Schaufelfußplattenende. If vibrations occur during operation, these vibrations are strongest at the outer end of the footplate. Therefore, it is advantageous to arrange the friction means just at this outer point. Vibrations are thereby further reduced.
- the friction means has a lower coefficient of friction than the material of the rotor and the blade root.
- a bronze-like alloy has proven to be a material for the friction agent.
- the pin has a round-shaped end, which has contact with the blade root plate during operation.
- the rounded end has a suitable radius, which depends on the angle of the recess to the radial direction, on the thickness of the friction means. Due to the round tip of the friction means ensures that at a vibration of the blade root plate always a sufficiently large contact surface between the friction means and the blade root plate prevails.
- the blade root plate end has a bevel on which the friction means rests during operation.
- the friction means is here seen in cross-section substantially triangular.
- FIG. 1 shows a section of a blade root 1, which is arranged in a arranged in the rotor 3 Schaufelfußnut 2.
- the rotor 3 rotates in operation about a rotation axis, not shown.
- Presentation shows the situation during operation.
- a centrifugal force in the radial direction 4 acts on the blade root 1.
- a recess 6 is arranged in the rotor 3.
- a friction means 7 is arranged movably.
- the friction means 7 also experiences a centrifugal force in operation in the radial direction 4 and exerts a force on a Schaufelfußplattenende 8.
- a movement of the Schaufelfußplattenendes 8 in the radial direction 4 is thereby effectively avoided, whereby blade vibrations are prevented.
- FIG. 2 shows a plan view of the blade root 1 from above.
- the blade root 1 is executed here curved.
- the axis of rotation 9 is symbolized by the dotted line.
- On a first side of the blade root 1 a plurality of recesses 6 are arranged with friction means 7.
- the recesses 6 can in this case be arranged at equidistant intervals on the first side 10.
- On the second side 11 a plurality of recesses 6 are arranged with friction means 7 as well.
- the recesses 6 can be arranged at equidistant intervals on the second side 11. Preferably, at the ends of the second side 11, the number of recesses 6 heaped.
- FIG. 3 is an enlarged view of the friction means 7 with the recess 6 can be seen.
- the recess 6 is in this case designed as a bore, wherein the diameter of the bore is larger than the diameter of the running as a pin friction means 7.
- the recess 6 and the friction means 7 are inclined at an angle ⁇ relative to the axis of rotation 9.
- the angle ⁇ is preferably 45 °.
- the angle ⁇ is between 35 ° and 55 °.
- the angle is between 30 ° and 60 °.
- the angle is between 25 ° and 65 °.
- FIG. 4 is a representation of the blade vibrations of the blade symbolized.
- the blade root 1 has a contact with the Schaufelfußnut 2 at different support edges 5.
- the friction means 7 exerts a force on the Schaufelfußplattenende 8 under centrifugal force.
- a friction occurs between the friction means 7 and the blade root plate end 8, whereby a vibration is reduced.
- a friction between the friction means 7 and the rotor 3 is present at the second friction point 15. This friction counteracts the centrifugal force.
- the friction means 7 is shown symbolized.
- the friction means 7 is cylindrical in shape with a radius R. At the contact point 16 between the friction means 7 and the blade root 1, the friction means 7 is formed pointed under a radius R '.
- FIG. 7 An alternative embodiment of the friction means 7 can be seen.
- the friction means 7 is in this case elongated and is seen in cross-section triangular.
- the Schaufelfußplattenende 8 is hereby bevelled.
- the recess 6 has a total of three straight walls 17. Under centrifugal force is the friction agent 7 moves in the radial direction 4, whereby the friction means 7 rests against the wall 17 and the chamfered surface 18.
- FIG. 8 is a plan view of a curved blade root 1 with a total of four according to FIG. 7 trained friction means 7 to see.
- the friction means 7 are elongate and arranged at the ends of the blade root 1.
- the friction means 7 should have a low coefficient of friction, z.
- bronze-type alloys can be used. These alloys have a reasonably high density, which is comparable to steel, which makes it possible to generate sufficient contact forces.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Die Erfindung betrifft eine Schaufelbefestigung umfassend einen mit Schaufelfußnuten versehenen Rotor und zumindest eine Schaufel umfassend einen Schaufelfuß und eine Schaufelfußplatte, wobei die Schaufel zum Einbau in die Schaufelfußnut ausgebildet ist.The invention relates to a blade attachment comprising a rotor provided with Schaufelfußnuten and at least one blade comprising a blade root and a Schaufelfußplatte, wherein the blade is designed for installation in the Schaufelfußnut.
In Strömungsmaschinen werden in der Regel Turbinenschaufeln eingesetzt, die jeweils ein Schaufelblatt und einen Schaufelfuß aufweisen. Eine Dampfturbine als Ausführungsbeispiel einer Strömungsmaschine umfasst im Wesentlichen einen Rotor, der drehbar gelagert ist und ein um den Rotor angeordnetes Gehäuse. Die Turbinenschaufeln werden in sogenannte Nuten in dem Rotor angeordnet. Es sind verschiedene Nutenformen bekannt, wie beispielsweise die so genannte T-Form bzw. die Tannenbaumnut. Die Schaufelfüße werden in diese Nuten eingeschoben und werden im Betrieb durch die Fliehkraft in radialer Richtung nach außen gedrängt, wodurch Berührungsflächen zwischen den Nuten und den Schaufelfüßen entstehen. Trotz genauen Fertigungsmethoden und präzisen Fräsmöglichkeiten, die dazu führen, dass die Schaufelfüße passgenau in den Nuten angeordnet werden können, kann es im Betrieb vorkommen, dass die Turbinenschaufeln schwingen. Solche Schwingungen führen einerseits zu Strömungsverlusten und führen andererseits auch zu einer Materialermüdung. Wünschenswert wäre es, eine verbesserte Turbinenschaufelbefestigung zu haben, bei der Schaufelschwingungen minimiert sind.In turbomachines turbine blades are generally used, each having an airfoil and a blade root. A steam turbine as an exemplary embodiment of a turbomachine essentially comprises a rotor which is rotatably mounted and a housing arranged around the rotor. The turbine blades are placed in so-called grooves in the rotor. There are various Nutenformen known, such as the so-called T-shape or the Christmas tree groove. The blade roots are inserted into these grooves and, in use, are urged radially outwards by the centrifugal force, creating contact surfaces between the grooves and the blade roots. Despite accurate manufacturing methods and precise milling capabilities that allow the blade roots to be accurately located in the grooves, the turbine blades may oscillate during operation. On the one hand, such vibrations lead to flow losses and, on the other hand, also lead to material fatigue. It would be desirable to have an improved turbine blade attachment where blade vibration is minimized.
An dieser Stelle setzt die Erfindung an, deren Aufgabe es ist, eine Schaufelbefestigung anzugeben, bei der Schwingungen vermindert sind.At this point, the invention begins, whose task is to provide a blade attachment, are reduced in the vibrations.
Gelöst wird diese Aufgabe durch eine Schaufelbefestigung umfassend einen mit Schaufelfußnuten versehenen Rotor und zumindest eine Schaufel umfassend einen Schaufelfuß und eine Schaufelfußplatte, wobei die Schaufel zum Einbau in die Schaufelfußnut ausgebildet ist, wobei der Rotor eine Ausnehmung aufweist, in die ein Reibungsmittel angeordnet ist, das durch eine im Betrieb auftretende Fliehkraft gegen die Schaufelfußplatte gedrückt wird.This object is achieved by a blade attachment comprising a rotor provided with Schaufelfußnuten and at least one blade comprising a blade root and a Schaufelfußplatte, wherein the blade is designed for installation in the Schaufelfußnut, wherein the rotor has a recess, in which a friction means is arranged is pressed by a centrifugal force occurring during operation against the blade root plate.
Mit der Erfindung wird nun vorgeschlagen, Schaufelschwingungen zu vermeiden, indem ein Reibungsmittel derart gegen die Schaufelfußplatte gedrückt wird, dass eine Kraft ausgeübt wird, die Schwingungen wirksam verhindert. Das Reibungsmittel wird vor dem Einbau der Schaufel in die Schaufelfußnut in die Ausnehmung angeordnet. Die Ausnehmung ist hierbei ein wenig größer als die Größe des Reibungsmittels, wodurch es möglich wird, den Schaufelfuß in die Schaufelfußnut einzuschieben.With the invention it is now proposed to avoid blade vibrations by pushing a friction means against the blade root plate in such a way that a force is exerted which effectively prevents vibrations. The friction means is arranged in the recess before the blade is installed in the blade root groove. The recess is in this case a little larger than the size of the friction means, whereby it is possible to insert the blade root in the Schaufelfußnut.
Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.Advantageous developments are specified in the subclaims.
In einer vorteilhaften Weiterbildung ist die Ausnehmung als eine Bohrung ausgeführt. Eine Bohrung ist eine vergleichsweise schnelle und günstige Möglichkeit eine Ausnehmung herzustellen. Vorteilhafterweise wird das Reibungsmittel als ein Stift ausgebildet, wobei der Stift einen geringfügig geringeren Durchmesser hat als die Bohrung. Dadurch kann das Reibungsmittel frei in der Bohrung bewegt werden. Insbesondere besteht dann die Möglichkeit, dass das Reibungsmittel infolge einer im Betrieb wirkenden Fliehkraft in der Bohrung gegen die Schaufelfußplatte gedrückt wird.In an advantageous development, the recess is designed as a bore. A bore is a comparatively quick and inexpensive way to make a recess. Advantageously, the friction means is formed as a pin, wherein the pin has a slightly smaller diameter than the bore. Thereby, the friction means can be moved freely in the bore. In particular, there is then the possibility that the friction means is pressed against the blade base plate as a result of a centrifugal force acting in operation in the bore.
In einer weiteren vorteilhaften Weiterbildung ist die Ausnehmung gegenüber der radialen Richtung schräg ausgeführt. Durch die schräge Anordnung des Reibungsmittels in der schräg angeordneten Ausnehmung herrschen Reibungskräfte, mit denen die Schwingung einer Schaufel wirksam gedämpft werden kann.In a further advantageous development, the recess is made oblique with respect to the radial direction. Due to the oblique arrangement of the friction means in the obliquely arranged recess prevail frictional forces with which the vibration of a blade can be effectively damped.
Im Betrieb klemmt das Reibungsmittel in der Ausnehmung gegen die Schaufelfußplatte. Das System aus Reibungsmittel, Ausnehmung und Schaufelfußplatte bildet ein starres System. Störende Schwingungen werden durch das starre System vermindert.In operation, the friction means clamps in the recess against the blade root plate. The system of friction means, recess and blade root plate forms a rigid system. Disturbing vibrations are reduced by the rigid system.
Vorzugsweise ist die Ausnehmung unter einem Winkel von 45° ausgeführt. Die Ausnehmung kann vorteilhafterweise auch zwischen 35° und 55°, zwischen 30° und 60°, zwischen 40° und 50° sowie zwischen 25° und 75° betragen. Die Wahl des Winkels hängt von den Reibungskoeffizienten des Materials des Rotors und des Materials des Reibungsmittels und des Materials des Schaufelfußes ab.Preferably, the recess is designed at an angle of 45 °. The recess may advantageously also be between 35 ° and 55 °, between 30 ° and 60 °, between 40 ° and 50 ° and between 25 ° and 75 °. The choice of angle depends on the coefficients of friction of the material of the rotor and the material of the friction means and the material of the blade root.
In einer weiteren vorteilhaften Weiterbildung ist die Ausnehmung an einem Schaufelfußplattenende angeordnet. Sofern Schwingungen auftreten im Betrieb sind diese Schwingungen an dem äußeren Ende der Fußplatte am stärksten. Daher ist es vorteilhaft, gerade an dieser äußeren stelle das Reibungsmittel anzuordnen. Schwingungen werden dadurch noch weiter vermindert.In a further advantageous development, the recess is arranged on a Schaufelfußplattenende. If vibrations occur during operation, these vibrations are strongest at the outer end of the footplate. Therefore, it is advantageous to arrange the friction means just at this outer point. Vibrations are thereby further reduced.
In einer weiteren vorteilhaften Weiterbildung weist das Reibungsmittel einen niedrigeren Reibungskoeffizienten auf als das Material des Rotors und des Schaufelfußes. Als besonders vorteilhaft hat sich eine bronzeartige Legierung als Material für das Reibungsmittel bewährt.In a further advantageous development, the friction means has a lower coefficient of friction than the material of the rotor and the blade root. As a particularly advantageous a bronze-like alloy has proven to be a material for the friction agent.
In einer weiteren vorteilhaften Weiterbildung weist der Stift ein rund ausgebildetes Ende auf, das im Betrieb Kontakt mit der Schaufelfußplatte aufweist. Das rund ausgebildete Ende weist einen geeigneten Radius auf, der von dem Winkel der Ausnehmung zur radialen Richtung, von der Dicke des Reibungsmittels abhängt. Durch die rund ausgebildete Spitze des Reibungsmittels ist gewährleistet, dass bei einer Schwingung der Schaufelfußplatte immer eine genügend große Anlagefläche zwischen dem Reibungsmittel und der Schaufelfußplatte herrscht.In a further advantageous development, the pin has a round-shaped end, which has contact with the blade root plate during operation. The rounded end has a suitable radius, which depends on the angle of the recess to the radial direction, on the thickness of the friction means. Due to the round tip of the friction means ensures that at a vibration of the blade root plate always a sufficiently large contact surface between the friction means and the blade root plate prevails.
In einer vorteilhaften Weiterbildung weist das Schaufelfußplattenende eine Abschrägung auf, an der das Reibungsmittel im Betrieb anliegt. Das Reibungsmittel ist hierbei im Querschnitt gesehen im Wesentlichen dreieckig ausgebildet.In an advantageous development, the blade root plate end has a bevel on which the friction means rests during operation. The friction means is here seen in cross-section substantially triangular.
Im Folgenden wird ein Ausführungsbeispiel der Erfindung anhand von Figuren näher erläutert. Dabei zeigen:
Figur 1- einen Ausschnitt einer Schaufelbefestigung mit einem Reibungselement,
- Figur 2
- eine Draufsicht auf einen gekrümmten Schaufelfuß,
Figur 3- eine vergrößerte Darstellung des Reibungsmittels aus
,Figur 1 Figur 4- eine symbolisierte Darstellung der Schaufel sowie der Schaufelbefestigung,
Figur 5- eine Prinzipskizze für die Anordnung des Reibungsmittels,
Figur 6- eine Darstellung des Reibungsmittels,
Figur 7- eine Darstellung einer alternativen Ausführungsform des Reibungsmittels,
Figur 8- eine Draufsicht auf einen Schaufelfuß mit dem gemäß
dargestellten alternativ ausgeführten Reibungsmittel.Figur 7
- FIG. 1
- a detail of a blade attachment with a friction element,
- FIG. 2
- a plan view of a curved blade root,
- FIG. 3
- an enlarged view of the friction means
FIG. 1 . - FIG. 4
- a symbolized representation of the blade and the blade attachment,
- FIG. 5
- a schematic diagram of the arrangement of the friction agent,
- FIG. 6
- a representation of the friction agent,
- FIG. 7
- a representation of an alternative embodiment of the friction agent,
- FIG. 8
- a plan view of a blade root with the according to
FIG. 7 illustrated alternatively executed friction means.
Die
Die
In der
In der
In der
In der
In der
In der
Das Reibungsmittel 7 sollte einen niedrigen Reibungskoeffizient aufweisen, z. B. können bronzeartige Legierungen verwendet werden. Diese Legierungen weisen eine angemessen hohe Dichte auf, die vergleichbar ist zu Stahl, wodurch es möglich ist, ausreichende Kontaktkräfte zu erzeugen.The friction means 7 should have a low coefficient of friction, z. For example, bronze-type alloys can be used. These alloys have a reasonably high density, which is comparable to steel, which makes it possible to generate sufficient contact forces.
Claims (16)
umfassend einen mit Schaufelfußnuten (2) versehenen Rotor (3) und zumindest eine Schaufel,
umfassend einen Schaufelfuß (1) und eine Schaufelfußplatte,
wobei die Schaufel zum Einbau in die Schaufelfußnut (2) ausgebildet ist,
dadurch gekennzeichnet, dass
der Rotor (3) eine Ausnehmung (6) aufweist, in die ein Reibungsmittel (7) angeordnet ist, das durch eine im Betrieb auftretende Fliehkraft gegen die Schaufelfußplatte gedrückt wird.Blade attachment,
comprising a rotor (3) provided with Schaufelfußnuten (2) and at least one blade,
comprising a blade root (1) and a blade foot plate,
wherein the blade is designed for installation in the Schaufelfußnut (2),
characterized in that
the rotor (3) has a recess (6) in which a friction means (7) is arranged, which is pressed against the blade base plate by a centrifugal force occurring during operation.
wobei der Rotor (3) entlang einer Rotationsachse (9) ausgebildet ist und der Schaufelfuß (1) und die Schaufelfußnut (2) gegenüber der Rotationsachse (9) gekrümmt ausgebildet ist.Blade foot mounting according to claim 1,
wherein the rotor (3) along an axis of rotation (9) is formed and the blade root (1) and the Schaufelfußnut (2) opposite to the rotation axis (9) is curved.
wobei die Ausnehmung (6) eine Bohrung ist.Blade foot mounting according to claim 1 or 2,
wherein the recess (6) is a bore.
wobei das Reibungsmittel (7) als ein Stift ausgebildet ist.Blade attachment according to claim 3,
wherein the friction means (7) is formed as a pin.
wobei die Schaufel entlang einer in Bezug auf die Rotationsachse (9) radialen Richtung (4) ausgebildet ist und die Ausnehmung (6) gegenüber der radialen Richtung (4) schräg ausgeführt ist.Blade foot mounting according to one of the preceding claims,
wherein the blade is formed along a radial direction (4) with respect to the rotation axis (9), and the recess (6) is inclined relative to the radial direction (4).
wobei die Ausnehmung (6) unter einem Winkel zwischen 35° und 55° gegenüber der radialen Richtung (4) schräg ausgeführt ist.Blade foot mounting according to claim 5,
wherein the recess (6) is inclined at an angle between 35 ° and 55 ° with respect to the radial direction (4).
wobei die Ausnehmung (6) unter einem Winkel zwischen 30° und 60° gegenüber der radialen Richtung schräg ausgeführt ist.Blade foot mounting according to claim 5,
wherein the recess (6) is inclined at an angle between 30 ° and 60 ° with respect to the radial direction.
wobei die Ausnehmung (6) unter einem Winkel zwischen 40° und 50° gegenüber der radialen Richtung (4) schräg ausgeführt ist.Blade foot mounting according to claim 5,
wherein the recess (6) is inclined at an angle between 40 ° and 50 ° relative to the radial direction (4).
wobei die Ausnehmung (6) unter einem Winkel zwischen 25° und 65° gegenüber der radialen Richtung (4) schräg ausgeführt ist.Blade foot mounting according to claim 5,
wherein the recess (6) is inclined at an angle between 25 ° and 65 ° relative to the radial direction (4).
wobei die Schaufelfußplatte ein äußeres an dem Rotor anliegendes Schaufelfußplattenende (8) aufweist und die Ausnehmung (6) am Schaufelfußplattenende (8) angeordnet ist.Blade foot mounting according to one of the preceding claims,
wherein the blade root plate has an outer blade root plate end (8) against the rotor, and the recess (6) is disposed at the blade root plate end (8).
wobei das Reibungsmittel (7) einen niedrigeren Reibungskoeffizienten aufweist als das Material des Rotors (2) und des Schaufelfußes (1).Blade foot mounting according to one of claims 3 to 10,
wherein the friction means (7) has a lower coefficient of friction than the material of the rotor (2) and the blade root (1).
wobei das Material des Reibungsmittels (7) eine bronzeartige Legierung ist.Blade foot mounting according to claim 11,
wherein the material of the friction means (7) is a bronze-like alloy.
wobei der Stift ein rund ausgebildetes Ende aufweist, das im Betrieb Kontakt mit der Schaufelfußplatte aufweist.Blade foot mounting according to one of claims 4 to 12,
wherein the pin has a rounded end which in use has contact with the blade root plate.
wobei die Schaufelfußplatte ein Schaufelfußplattenende (8) aufweist und das Schaufelfußplattenende (8) eine Abschrägung aufweist, an der das Reibungsmittel (7) im Betrieb anliegt.Blade foot mounting according to claim 1 or 2,
wherein the blade root plate has a Schaufelfußplattenende (8) and the Schaufelfußplattenende (8) has a bevel on which the friction means (7) rests in operation.
wobei das Reibungsmittel (7) im Querschnitt gesehen im Wesentlichen dreieckförmig ausgebildet ist.Blade foot mounting according to claim 14,
wherein the friction means (7) seen in cross section is formed substantially triangular.
wobei das Reibungsmittel (7) länglich ausgebildet ist und im Wesentlichen entlang einer Rotoroberfläche angeordnet ist.Blade foot mounting according to claim 14 or 15,
wherein the friction means (7) is elongated and disposed substantially along a rotor surface.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08014644A EP2157283A1 (en) | 2008-08-18 | 2008-08-18 | Blade attachment with damping element for a fluid flow engine |
PCT/EP2009/060423 WO2010020568A1 (en) | 2008-08-18 | 2009-08-12 | Vane fastener with damping element for a fluid kinetic machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08014644A EP2157283A1 (en) | 2008-08-18 | 2008-08-18 | Blade attachment with damping element for a fluid flow engine |
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Publication Number | Publication Date |
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EP2157283A1 true EP2157283A1 (en) | 2010-02-24 |
Family
ID=41226936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP08014644A Withdrawn EP2157283A1 (en) | 2008-08-18 | 2008-08-18 | Blade attachment with damping element for a fluid flow engine |
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EP (1) | EP2157283A1 (en) |
WO (1) | WO2010020568A1 (en) |
Citations (10)
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US4936749A (en) * | 1988-12-21 | 1990-06-26 | General Electric Company | Blade-to-blade vibration damper |
EP0437977A1 (en) * | 1990-01-18 | 1991-07-24 | United Technologies Corporation | Turbine rim configuration |
EP0509838A1 (en) * | 1991-04-19 | 1992-10-21 | General Electric Company | Vibration damping of gas turbine engine buckets |
US5226784A (en) * | 1991-02-11 | 1993-07-13 | General Electric Company | Blade damper |
US5242270A (en) * | 1992-01-31 | 1993-09-07 | Westinghouse Electric Corp. | Platform motion restraints for freestanding turbine blades |
WO2000070193A1 (en) * | 1999-05-14 | 2000-11-23 | Siemens Aktiengesellschaft | Turbo-machine comprising a sealing system for a rotor |
EP1124038A1 (en) * | 2000-02-09 | 2001-08-16 | Siemens Aktiengesellschaft | Turbine blading |
US20070183894A1 (en) * | 2006-02-08 | 2007-08-09 | Snecma | Turbomachine rotor wheel |
-
2008
- 2008-08-18 EP EP08014644A patent/EP2157283A1/en not_active Withdrawn
-
2009
- 2009-08-12 WO PCT/EP2009/060423 patent/WO2010020568A1/en active Application Filing
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2997274A (en) * | 1953-04-13 | 1961-08-22 | Morgan P Hanson | Turbo-machine blade vibration damper |
US3037741A (en) * | 1958-12-29 | 1962-06-05 | Gen Electric | Damping turbine buckets |
US4936749A (en) * | 1988-12-21 | 1990-06-26 | General Electric Company | Blade-to-blade vibration damper |
EP0437977A1 (en) * | 1990-01-18 | 1991-07-24 | United Technologies Corporation | Turbine rim configuration |
US5226784A (en) * | 1991-02-11 | 1993-07-13 | General Electric Company | Blade damper |
EP0509838A1 (en) * | 1991-04-19 | 1992-10-21 | General Electric Company | Vibration damping of gas turbine engine buckets |
US5242270A (en) * | 1992-01-31 | 1993-09-07 | Westinghouse Electric Corp. | Platform motion restraints for freestanding turbine blades |
WO2000070193A1 (en) * | 1999-05-14 | 2000-11-23 | Siemens Aktiengesellschaft | Turbo-machine comprising a sealing system for a rotor |
EP1124038A1 (en) * | 2000-02-09 | 2001-08-16 | Siemens Aktiengesellschaft | Turbine blading |
US20070183894A1 (en) * | 2006-02-08 | 2007-08-09 | Snecma | Turbomachine rotor wheel |
Also Published As
Publication number | Publication date |
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WO2010020568A1 (en) | 2010-02-25 |
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