EP3167163B1 - Wheel disc assembly - Google Patents
Wheel disc assembly Download PDFInfo
- Publication number
- EP3167163B1 EP3167163B1 EP15778914.0A EP15778914A EP3167163B1 EP 3167163 B1 EP3167163 B1 EP 3167163B1 EP 15778914 A EP15778914 A EP 15778914A EP 3167163 B1 EP3167163 B1 EP 3167163B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wheel disk
- bolt
- sealing plate
- latching
- disk arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/005—Sealing means between non relatively rotating elements
- F01D11/006—Sealing the gap between rotor blades or blades and rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
- F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/32—Locking, e.g. by final locking blades or keys
-
- 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
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
-
- 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
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
- F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
-
- 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
- F05D2260/30—Retaining components in desired mutual position
-
- 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
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking
Definitions
- the present invention relates to a wheel disc assembly having a wheel disc, a plurality of blade devices, which are fixed along an outer circumference of the wheel disc, at least one sealing plate, which is slidably received between the wheel disc and the blade means in the circumferential direction, and at least one securing device, which are designed such that it secures the sealing plate against displacement in the circumferential direction.
- Wheel disc assemblies of the type mentioned are known in the art. They form components of rotors, such as gas turbine rotors or the like. Normally, a plurality of sealing plates are slidably received in the circumferential direction between the wheel disc and the blade means. Thus, the sealing plates can be used for example in radially spaced-apart annular grooves, which are formed on the wheel disc on the one hand and on the blade means on the other. In order to ensure proper functioning of the sealing plates, it is necessary to secure the individual sealing plates against displacement in the circumferential direction, for which corresponding securing devices are used.
- Such a securing device can be formed, for example, by a screw extending through a passage opening provided in the sealing plate and a threaded bore provided on the wheel disc or on a blade device into which the screw is screwed in the intended mounted state.
- a problem of a safety device designed in this way is that the notch effect associated with the threaded bore provided in the wheel disc or in the blade device has a negative effect on the strength of the wheel disc or the blade device and can cause corresponding problems.
- screws can often no longer be solved in case of service, resulting in a complicated boring of the screw by itself, whereby the wheel disc or the blade device and thus an expensive component is damaged.
- From the EP 2 218 873 A1 is another embodiment of a sealing plate locking known.
- a breakthrough in the form of a keyhole is present in the sealing plate, wherein a blind hole is mounted therein for engagement of a locking pin in the wheel disc.
- the locking pin here also has a radially projecting cam, which is axially secured by inserting the locking pin through the keyhole by turning.
- the present invention provides a Radterionan extract of the aforementioned type, wherein the securing means comprises a provided by a provided in the sealing plate through hole bolts and provided on the wheel disc or on a blade means recess which receives the free end of the bolt and whose wall limits movement of the bolt in the circumferential direction, and wherein the bolt is secured in the axial direction by a latching connection against accidental release on the sealing plate.
- the bolt of the safety device according to the invention is not bolted to the wheel or a blade device in contrast to the prior art described above but is held directly or indirectly via a latching connection to the sealing plate, it is prevented that the strength of the wheel or the Schaufel issued herabge by the notch effect of a thread is set. Furthermore, the bolt can be quickly and easily installed and dismantled thanks to the locking connection. Even if the locking connection would have to be drilled in the individual case lack of solubility, drilling only affects the bolt and the sealing plate and no expensive component such as the wheel or the blade device, which has a positive effect on maintenance costs.
- the recess is formed as extending transversely to the circumferential direction extending slot.
- manufacturing tolerances, thermal expansion or the like can be easily compensated because the bolt can move in the radial direction within the recess.
- the latching connection comprises at least one latching recess and at least one latching projection, which engage in each other in the radial direction.
- the at least one latching recess is annular, whereby a simple and inexpensive to manufacture structure is achieved.
- two locking projections arranged radially opposite each other are provided, whereby a very reliable latching connection is achieved.
- At least one actuating element operable manually or using a tool for releasing the latching connection is provided on the bolt. In this way, a simple manual release of the locking connection is ensured.
- the at least one actuating element is designed as an axially outwardly projecting spring arm, wherein the number of actuating elements advantageously corresponds to the number of latching projections.
- the locking connection between the bolt and the sealing plate is provided, resulting in a structure with only a few individual components.
- the latching connection between the bolt and a sleeve is provided, which is inserted captive into the passage opening provided in the sealing plate.
- a sleeve has the Advantage that it can be replaced in case of service in a simple manner without great expense.
- FIGS. 1 to 3 show a section of a wheel disc assembly 1 according to a first embodiment of the present invention.
- the wheel disc assembly 1 comprises a wheel disc 2, a plurality of blade devices, not shown, which are attached along an outer periphery of the wheel disc 2, and a plurality of sealing plates 3, which extend between the wheel disc 2 and the blade means and are slidably received in the circumferential direction U. More specifically, the sealing plates 3 are inserted in annular grooves which are arranged spaced apart in the radial direction R, wherein the annular grooves are formed on the wheel disc 2 on the one hand and on the blade means on the other. In FIG. 1 only the formed on the wheel disc 2 undercut annular groove 4 is shown, are used in the formed on the radially inwardly facing edges of the sealing plates 3 beads 5.
- the wheel disc assembly 1 comprises a plurality of securing devices 6.
- Each securing device 6 has a bolt 8 extending through a through opening 7 provided in a sealing plate 3 and a recess 9 provided on the wheel disc 2 , which receives the free end of the bolt 8.
- the bolt 8 is secured in the axial direction A by a latching connection 10 against unintentional release on the sealing plate 3.
- the passage opening 7 has two coaxial sections with different diameters D 1 and D 2 in the axial direction, the diameter D 1 of that section facing the recess 9 being greater than the diameter D 2 of the section facing away from the recess 9. Accordingly, a detent recess 11 is defined between the sections.
- the bolt 8 comprises a cylindrical bolt head 12, to which two radially connecting opposing and axially extending actuators 13 in the form of spring arms.
- each locking projection 14 on its side facing the bolt head 12 has a tapered surface 15, the diameter of which tapers to produce an insertion aid in the direction of the bolt head 12.
- the position of the locking projections 14 is selected such that they are moved towards each other when the actuating elements 13 are compressed.
- the recess 9 is formed as extending in the radial direction R elongated hole.
- the width B of the oblong hole is selected to be slightly larger than the diameter of the bolt head 12, so that the bolt head 12 can be inserted into the recess 9. However, a movement of the bolt head 12 and thus of the bolt 8 in the circumferential direction U is limited.
- the length L of the slot is greater than its width B, so that the bolt head 12 in the radial direction R is movable within the recess 9 to compensate for thermal expansion or the like.
- the through hole 7 and the recess 9 are brought into coincidence with each other in a first step by the sealing plate 3 is moved in the circumferential direction U accordingly.
- the bolt 8 is inserted with the bolt head 12 ahead in the through hole 7 until the tapered surfaces 15 of the locking projections 14 with the smaller diameter D2 defining edge of the through hole 7 come into contact.
- the actuating elements 13 projecting outward from the sealing plate 3 must be compressed only manually or using a suitable tool, whereupon the pin 8 can be removed from the passage opening 7.
- FIGS. 4 to 6 show a wheel disc assembly 16 according to a second embodiment of the present invention.
- the wheel disc assembly 16 includes a wheel disc 17, a plurality of blade devices, not shown, which are attached along an outer circumference of the wheel disc 17, and a plurality of sealing plates 18 which extend between the wheel disc 17 and the blade means and are slidably received in the circumferential direction U. More specifically, the sealing plates 18 are inserted into annular grooves which are arranged spaced apart in the radial direction R, wherein the annular grooves are formed on the wheel disc 17 on the one hand and on the blade means on the other. In FIG. 4 only the formed on the wheel disc 17 undercut annular groove 19 is shown, in which at the radially inwardly facing edges of the sealing plates 18 formed beads 20 are used.
- the wheel disc assembly 1 comprises a plurality of securing devices 21.
- Each securing device 21 has a sleeve 23 extending through a through opening 22 provided in a sealing plate 18, a pin 24 extending through the sleeve 23 and a provided on the wheel disc 17 recess 25 which receives the free end of the pin 24.
- the passage opening 22 is divided in the axial direction into two coaxial sections having different diameters D 3 and D 4 , the diameter D 3 of that section facing the recess 25 being greater than the diameter D 4 of the section facing away from the recess 25. Accordingly, a paragraph 26 is defined between the sections.
- the smaller hole with the diameter D 4 are drilled through, while the larger hole with the diameter D 3 is only lowered.
- the outer contour of the sleeve 23 is formed corresponding to the contour of the passage opening 22. Accordingly, the sleeve at its recess 25 facing the free end on a radially outwardly projecting and annular retaining projection 27 which defines a stop. At the opposite free end of the inner wall of the sleeve 23 defines an insertion cone 28 which is provided with an annular circumferential recess recess 29.
- the bolt 24 comprises a cylindrical bolt head 30, to which two radially opposite and substantially in the axial direction A extending actuating elements 31 in the form of spring arms join, which widen in the radial direction R conically corresponding to the insertion cone 28 of the sleeve 23.
- actuating elements 31 in the form of spring arms join, which widen in the radial direction R conically corresponding to the insertion cone 28 of the sleeve 23.
- radially opposing and outwardly projecting locking projections 32 are provided in the transition region between the bolt head 30 and the actuators 31 .
- the position of the latching projections 32 is selected such that they are moved towards each other when the actuators 31 are compressed.
- the recess 25 is formed analogous to the recess 9 of the wheel disc assembly 1 according to the first embodiment described above, which is why at this point a further description is omitted.
- the sleeve 23 is inserted from behind into the through hole 22 of the sealing plate 18 in a first step until it abuts the sealing plate 18. Then, the passage opening 22 is brought into coincidence with the recess 25 by the sealing plate 18 is moved in the circumferential direction U accordingly. Subsequently, the bolt 24 is inserted with the bolt head 30 ahead in the sleeve 23 until the locking projections 32 of the bolt 24 snaps into the associated latching recess 29 of the sleeve 23. The latching connection produced thereby secures the bolt 24 in the axial direction A, as in FIG. 4 is shown. Also, the sealing plate 18 is secured thanks to the recorded in the recess 25 bolt head 30 against movement in the circumferential direction U.
- the actuating elements 31 projecting outward from the sealing plate 18 must be compressed only manually or using a suitable tool, whereupon the bolt 24 can be removed from the sleeve 23.
- a significant advantage of the above-described securing devices 6, 21 of the Radularnan extract 1, 16 is that they secure the sealing plates 3, 18 in a simple manner against movement in the circumferential direction U, without affecting the strength of the wheel discs 2, 17 by notch effect become. It should be noted at this point that the recesses 9, 25 according to the invention can alternatively or additionally also be provided on blade devices, even if this is not shown in the present case.
- the securing devices 6, 21 are also advantageous in terms of their simple structure and in terms of their ease of assembly and disassembly.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
Die vorliegende Erfindung betrifft eine Radscheibenanordnung mit einer Radscheibe, mehreren Schaufeleinrichtungen, die entlang eines Außenumfangs der Radscheibe befestigt sind, zumindest einem Dichtblech, das zwischen der Radscheibe und den Schaufeleinrichtungen in Umfangsrichtung verschiebbar aufgenommen ist, und zumindest einer Sicherungseinrichtung, die derart ausgebildet sind, dass sie das Dichtblech gegen eine Verschiebung in Umfangsrichtung sichert.The present invention relates to a wheel disc assembly having a wheel disc, a plurality of blade devices, which are fixed along an outer circumference of the wheel disc, at least one sealing plate, which is slidably received between the wheel disc and the blade means in the circumferential direction, and at least one securing device, which are designed such that it secures the sealing plate against displacement in the circumferential direction.
Radscheibenanordnungen der eingangs genannten Art sind im Stand der Technik bekannt. Sie bilden Komponenten von Rotoren, wie beispielsweise Gasturbinenläufern oder dergleichen. Normalerweise sind zwischen der Radscheibe und den Schaufeleinrichtungen mehrere Dichtbleche in Umfangsrichtung verschiebbar aufgenommen. So können die Dichtbleche beispielsweise in radial voneinander beabstandet angeordnete Ringnuten eingesetzt sein, die an der Radscheibe einerseits und an den Schaufeleinrichtungen andererseits ausgebildet sind. Um eine ordnungsgemäße Funktion der Dichtbleche zu gewährleisten, ist es erforderlich, die einzelnen Dichtbleche gegen eine Verschiebung in Umfangsrichtung zu sichern, wozu entsprechende Sicherungseinrichtungen verwendet werden. Eine solche Sicherungseinrichtung kann beispielsweise durch eine sich durch eine im Dichtblech vorgesehene Durchgangsöffnung erstreckende Schraube und eine an der Radscheibe oder an einer Schaufeleinrichtung vorgesehene Gewindebohrung gebildet sein, in welche die Schraube im bestimmungsgemäß montierten Zustand geschraubt ist. Ein Problem einer derart ausgebildeten Sicherungseinrichtung besteht allerdings darin, dass sich die mit der in der Radscheibe oder in der Schaufeleinrichtung vorgesehenen Gewindebohrung einhergehende Kerbwirkung negativ auf die Festigkeit der Radscheibe bzw. der Schaufeleinrichtung auswirken und entsprechend Probleme bereiten kann. Darüber hinaus lassen sich Schrauben im Servicefall häufig nicht mehr lösen, was ein aufwendiges Aufbohren der Schraubverbindung nach sich zieht, wodurch die Radscheibe bzw. die Schaufeleinrichtung und damit eine teure Komponente beschädigt wird.
Aus der
Ausgehend von diesem Stand der Technik ist es eine Aufgabe der vorliegenden Erfindung, eine Radscheibenanordnung der eingangs genannten Art mit alternativem Aufbau zu schaffen.
Zur Lösung dieser Aufgabe schafft die vorliegende Erfindung eine Radscheibenanordnung der eingangs genannten Art, wobei die Sicherungseinrichtung einen sich durch eine in dem Dichtblech vorgesehene Durchgangsöffnung erstreckenden Bolzen und eine an der Radscheibe oder an einer Schaufeleinrichtung vorgesehene Ausnehmung aufweist, die das freie Ende des Bolzens aufnimmt und deren Wandung eine Bewegung des Bolzens in Umfangsrichtung begrenzt, und wobei der Bolzen in axialer Richtung durch eine Rastverbindung gegen ein ungewolltes Lösen an dem Dichtblech gesichert ist.
Aufgrund der Tatsache, dass der Bolzen der erfindungsgemäßen Sicherungseinrichtung im Gegensatz zum eingangs beschriebenen Stand der Technik nicht mit der Radscheibe oder einer Schaufeleinrichtung verschraubt sondern direkt oder indirekt über eine Rastverbindung an dem Dichtblech gehalten ist, wird verhindert, dass die Festigkeit der Radscheibe bzw. der Schaufeleinrichtung durch die Kerbwirkung eines Gewindes herabge setzt wird. Ferner lässt sich der Bolzen Dank der Rastverbindung schnell und einfach montieren sowie demontieren. Selbst wenn die Rastverbindung im Einzelfall mangels Lösbarkeit aufgebohrt werden müsste, betrifft das Aufbohren lediglich den Bolzen und das Dichtblech und keine teure Komponente wie die Radscheibe oder die Schaufeleinrichtung, was sich positiv auf die Wartungskosten auswirkt.Wheel disc assemblies of the type mentioned are known in the art. They form components of rotors, such as gas turbine rotors or the like. Normally, a plurality of sealing plates are slidably received in the circumferential direction between the wheel disc and the blade means. Thus, the sealing plates can be used for example in radially spaced-apart annular grooves, which are formed on the wheel disc on the one hand and on the blade means on the other. In order to ensure proper functioning of the sealing plates, it is necessary to secure the individual sealing plates against displacement in the circumferential direction, for which corresponding securing devices are used. Such a securing device can be formed, for example, by a screw extending through a passage opening provided in the sealing plate and a threaded bore provided on the wheel disc or on a blade device into which the screw is screwed in the intended mounted state. However, a problem of a safety device designed in this way is that the notch effect associated with the threaded bore provided in the wheel disc or in the blade device has a negative effect on the strength of the wheel disc or the blade device and can cause corresponding problems. About that In addition, screws can often no longer be solved in case of service, resulting in a complicated boring of the screw by itself, whereby the wheel disc or the blade device and thus an expensive component is damaged.
From the
Based on this prior art, it is an object of the present invention to provide a wheel disc assembly of the type mentioned above with an alternative structure.
To achieve this object, the present invention provides a Radscheibenanordnung of the aforementioned type, wherein the securing means comprises a provided by a provided in the sealing plate through hole bolts and provided on the wheel disc or on a blade means recess which receives the free end of the bolt and whose wall limits movement of the bolt in the circumferential direction, and wherein the bolt is secured in the axial direction by a latching connection against accidental release on the sealing plate.
Due to the fact that the bolt of the safety device according to the invention is not bolted to the wheel or a blade device in contrast to the prior art described above but is held directly or indirectly via a latching connection to the sealing plate, it is prevented that the strength of the wheel or the Schaufeleinrichtung herabge by the notch effect of a thread is set. Furthermore, the bolt can be quickly and easily installed and dismantled thanks to the locking connection. Even if the locking connection would have to be drilled in the individual case lack of solubility, drilling only affects the bolt and the sealing plate and no expensive component such as the wheel or the blade device, which has a positive effect on maintenance costs.
Vorteilhaft ist die Ausnehmung als sich quer zur Umfangsrichtung erstreckendes Langloch ausgebildet. Entsprechend können fertigungsbedingte Toleranzen, Wärmedehnungen oder dergleichen problemlos ausgeglichen werden, da sich der Bolzen in radialer Richtung innerhalb der Ausnehmung bewegen kann.Advantageously, the recess is formed as extending transversely to the circumferential direction extending slot. Correspondingly manufacturing tolerances, thermal expansion or the like can be easily compensated because the bolt can move in the radial direction within the recess.
Bevorzugt umfasst die Rastverbindung zumindest eine Rastvertiefung und zumindest einen Rastvorsprung, die in radialer Richtung ineinander greifen.Preferably, the latching connection comprises at least one latching recess and at least one latching projection, which engage in each other in the radial direction.
Vorteilhaft ist die zumindest eine Rastvertiefung ringförmig ausgebildet, wodurch ein einfacher und preiswert herzustellender Aufbau erzielt wird.Advantageously, the at least one latching recess is annular, whereby a simple and inexpensive to manufacture structure is achieved.
Gemäß einer Ausgestaltung der vorliegenden Erfindung sind zwei radial einander gegenüber angeordnete Rastvorsprünge vorgesehen, wodurch eine sehr verlässliche Rastverbindung erzielt wird.According to one embodiment of the present invention, two locking projections arranged radially opposite each other are provided, whereby a very reliable latching connection is achieved.
Vorteilhaft ist an dem Bolzen zumindest ein manuell oder unter Verwendung eines Werkzeugs betätigbares Betätigungselement zum Lösen der Rastverbindung vorgesehen. Auf diese Weise wird ein einfaches manuelles Lösen der Rastverbindung gewährleistet.Advantageously, at least one actuating element operable manually or using a tool for releasing the latching connection is provided on the bolt. In this way, a simple manual release of the locking connection is ensured.
Gemäß einer Ausgestaltung der vorliegenden Erfindung ist das zumindest ein Betätigungselement als axial auswärts vorstehender Federarm ausgebildet, wobei die Anzahl der Betätigungselemente vorteilhaft der Anzahl der Rastvorsprünge entspricht.According to one embodiment of the present invention, the at least one actuating element is designed as an axially outwardly projecting spring arm, wherein the number of actuating elements advantageously corresponds to the number of latching projections.
Gemäß einer Variante der vorliegenden Erfindung ist die Rastverbindung zwischen dem Bolzen und dem Dichtblech vorgesehen, wodurch sich ein Aufbau mit nur wenigen Einzelkomponenten ergibt.According to a variant of the present invention, the locking connection between the bolt and the sealing plate is provided, resulting in a structure with only a few individual components.
Gemäß einer weiteren Variante der vorliegenden Erfindung ist die Rastverbindung zwischen dem Bolzen und einer Hülse vorgesehen, die verliersicher in die in dem Dichtblech vorgesehene Durchgangsöffnung eingesetzt ist. Eine solche Hülse hat den Vorteil, dass sie im Servicefall in einfacher Art und Weise ohne großen Kostenaufwand ausgetauscht werden kann.According to a further variant of the present invention, the latching connection between the bolt and a sleeve is provided, which is inserted captive into the passage opening provided in the sealing plate. Such a sleeve has the Advantage that it can be replaced in case of service in a simple manner without great expense.
Die Hülse weist bevorzugt an ihrem der Ausnehmung zugewandten freien Ende zumindest einen radial vorstehenden Anschlag auf, der sich in axialer Richtung gegen das Dichtblech stützt, wodurch die Hülse in axialer Richtung an dem Dichtblech gesichert ist.The sleeve preferably has at its recess facing the free end at least one radially projecting stop, which is supported in the axial direction against the sealing plate, whereby the sleeve is secured in the axial direction of the sealing plate.
Weitere Merkmale und Vorteile der vorliegenden Erfindung werden anhand der nachfolgenden Beschreibung von Radscheiben gemäß Ausführungsformen der vorliegenden Erfindung unter Bezugnahme auf die beiliegende Zeichnung deutlich. Darin ist
- Figur 1
- eine Querschnittansicht eines Bereiches einer Radscheibenanordnung gemäß einer ersten Ausführungsform der vorliegenden Erfindung;
Figur 2- eine perspektivische Ansicht eines in
Figur 1 dargestellten Bolzens einer Sicherungseinrichtung; Figur 3- eine Vorderansicht des in
Figur 1 dargestellten Ausschnittes der Radscheibe; Figur 4- eine Querschnittsansicht eines Bereiches einer Radscheibenanordnung gemäß einer zweiten Ausführungsform der vorliegenden Erfindung;
Figur 5- eine perspektivische geschnittene Ansicht einer Hülse einer Sicherungseinrichtung der in
dargestellten Radscheibenanordnung; undFigur 4 Figur 6- eine perspektivische geschnittene Ansicht eines Bolzens der Sicherungseinrichtung der in
dargestellten Radscheibenanordnung.Figur 4
- FIG. 1
- a cross-sectional view of a portion of a Radscheibenanordnung according to a first embodiment of the present invention;
- FIG. 2
- a perspective view of an in
FIG. 1 illustrated bolt a safety device; - FIG. 3
- a front view of the in
FIG. 1 illustrated section of the wheel disc; - FIG. 4
- a cross-sectional view of a portion of a Radscheibenanordnung according to a second embodiment of the present invention;
- FIG. 5
- a perspective sectional view of a sleeve of a securing device of in
FIG. 4 shown wheel disc assembly; and - FIG. 6
- a perspective sectional view of a bolt of the securing device of in
FIG. 4 shown wheel disc assembly.
Die
Um die Dichtbleche 3 gegen eine Verschiebung in der Umfangsrichtung U zu sichern, umfasst die Radscheibenanordnung 1 mehrere Sicherungseinrichtungen 6. Jede Sicherungseinrichtung 6 weist einen sich durch eine in einem Dichtblech 3 vorgesehene Durchgangsöffnung 7 erstreckenden Bolzen 8 und eine an der Radscheibe 2 vorgesehene Ausnehmung 9 auf, die das freie Ende des Bolzens 8 aufnimmt.In order to secure the
Der Bolzen 8 ist in axialer Richtung A durch eine Rastverbindung 10 gegen ein ungewolltes Lösen an dem Dichtblech 3 gesichert. Die Durchgangsöffnung 7 weist hierzu in axialer Richtung zwei koaxiale Abschnitte mit unterschiedlichen Durchmessern D1 und D2 auf, wobei der Durchmesser D1 desjenigen Abschnittes, der zur Ausnehmung 9 weist, größer als der Durchmesser D2 des der Ausnehmung 9 abgewandten Abschnittes ist. Entsprechend ist zwischen den Abschnitten eine Rastvertiefung 11 definiert. Zur Herstellung der Durchgangsöffnung 7 kann beispielsweise die kleinere Bohrung mit dem Durchmesser D2 durchgebohrt werden, während die größere Bohrung mit dem Durchmesser D1 lediglich gesenkt wird. Der Bolzen 8 umfasst einen zylindrischen Bolzenkopf 12, an den sich zwei radial einander gegenüberliegende und sich axial erstreckende Betätigungselemente 13 in Form von Federarmen anschließen. Im Übergangsbereich zwischen dem Bolzenkopf 12 und den Betätigungselementen 13 sind radial einander gegenüber angeordnete Rastvorsprünge 14 vorgesehen, wobei jeder Rastvorsprung 14 an seiner dem Bolzenkopf 12 zugewandten Seite eine abgeschrägte Fläche 15 aufweist, deren Durchmesser sich zur Erzeugung einer Einführhilfe in Richtung des Bolzenkopfes 12 verjüngt. Die Position der Rastvorsprünge 14 ist derart gewählt, dass diese bei einem Zusammendrücken der Betätigungselemente 13 aufeinander zu bewegt werden.The
Die Ausnehmung 9 ist als sich in radialer Richtung R erstreckendes Langloch ausgebildet. Die Breite B des Langloches ist geringfügig größer als der Durchmesser des Bolzenkopfes 12 gewählt, so dass der Bolzenkopf 12 in die Ausnehmung 9 eingesetzt werden kann. Eine Bewegung des Bolzenskopfes 12 und somit des Bolzens 8 in Umfangsrichtung U wird indes begrenzt. Die Länge L des Langloches ist größer als dessen Breite B, so dass der Bolzenkopf 12 in radialer Richtung R innerhalb der Ausnehmung 9 bewegbar ist, um Wärmeausdehnungen oder dergleichen zu kompensieren.The
Zur radialen Sicherung eines zwischen den Ringnuten der Radscheibenanordnung 1 angeordneten Dichtbleches 3 werden in einem ersten Schritt die Durchgangsöffnung 7 und die Ausnehmung 9 miteinander in Deckung gebracht, indem das Dichtblech 3 entsprechend in Umfangsrichtung U bewegt wird. Daraufhin wird der Bolzen 8 mit dem Bolzenkopf 12 voran in die Durchgangsöffnung 7 eingesetzt, bis die abgeschrägten Flächen 15 der Rastvorsprünge 14 mit der den kleineren Durchmesser D2 definierenden Kante der Durchgangsöffnung 7 in Kontakt kommen. Nunmehr wir der Bolzen 8 unter Aufbringung einer Kraft weiter in Richtung der Ausnehmung 9 geschoben. Hierbei werden die Rastvorsprünge 14 derart weit aufeinander zu bewegt, dass sie vollständig in die Durchgangsöffnung 7 eingeführt werden können. Sobald die Rastvorsprünge 14 im Rahmen einer weiteren Vorwärtsbewegung des Bolzenkopfes 12 die Rastvertiefung 11 passieren, bewegen sich die Betätigungselemente 13 schnappend auseinander. Die hierdurch erzeugte Rastverbindung sichert den Bolzen 8 in axialer Richtung A, wie es in
Zum Lösen des Bolzens 8 müssen die von dem Dichtblech 3 auswärts vorstehenden Betätigungselemente 13 lediglich manuell oder unter Verwendung eines geeigneten Werkzeugs zusammengedrückt werden, woraufhin der Bolzen 8 aus der Durchgangsöffnung 7 entnommen werden kann.To release the
Die
Um die Dichtbleche 18 gegen eine Verschiebung in der Umfangsrichtung U zu sichern, umfasst die Radscheibenanordnung 1 mehrere Sicherungseinrichtungen 21. Jede Sicherungseinrichtung 21 weist eine sich durch eine in einem Dichtblech 18 vorgesehene Durchgangsöffnung 22 erstreckende Hülse 23, einen sich durch die Hülse 23 erstreckenden Bolzen 24 und eine an der Radscheibe 17 vorgesehene Ausnehmung 25 auf, die das freie Ende des Bolzens 24 aufnimmt.In order to secure the sealing
Die Durchgangsöffnung 22 ist in axialer Richtung in zwei koaxiale Abschnitte mit unterschiedlichen Durchmessern D3 und D4 unterteilt, wobei der Durchmesser D3 desjenigen Abschnittes, der zur Ausnehmung 25 weist, größer als der Durchmesser D4 des der Ausnehmung 25 abgewandten Abschnittes ist. Entsprechend ist zwischen den Abschnitten ein Absatz 26 definiert. Zur Herstellung der Durchgangsöffnung 22 kann beispielsweise die kleinere Bohrung mit dem Durchmesser D4 durchgebohrt werden, während die größere Bohrung mit dem Durchmesser D3 lediglich gesenkt wird.The
Der Außenkontur der Hülse 23 ist korrespondierend zur Kontur der Durchgangsöffnung 22 ausgebildet. Entsprechend weist die Hülse an ihrem der Ausnehmung 25 zugewandten freien Ende einen radial auswärts vorstehenden und ringförmig ausgebildeten Haltevorsprung 27 auf, der einen Anschlag definiert. An dem gegenüberliegenden freien Ende definiert die Innenwandung der Hülse 23 einen Einführkonus 28, der mit einer ringförmig umlaufenden Rastvertiefung 29 versehen ist.The outer contour of the
Der Bolzen 24 umfasst einen zylindrischen Bolzenkopf 30, an den sich zwei radial einander gegenüberliegende und im Wesentlichen in axialer Richtung A erstreckende Betätigungselemente 31 in Form von Federarmen anschließen, die sich in radialer Richtung R konusartig korrespondierend zum Einführkonus 28 der Hülse 23 aufweiten. Im Übergangsbereich zwischen dem Bolzenkopf 30 und den Betätigungselementen 31 sind radial einander gegenüber angeordnete und auswärts vorstehende Rastvorsprünge 32 vorgesehen. Die Position der Rastvorsprünge 32 ist derart gewählt, dass diese bei einem Zusammendrücken der Betätigungselemente 31 aufeinander zu bewegt werden.The
Die Ausnehmung 25 ist analog zur Ausnehmung 9 der Radscheibenanordnung 1 gemäß der zuvor beschriebenen ersten Ausführungsform ausgebildet, weshalb an dieser Stelle auf eine erneute Beschreibung verzichtet wird.The
Zur radialen Sicherung eines zwischen den Ringnuten der Radscheibenanordnung 16 angeordneten Dichtbleches 18 wird in einem ersten Schritt die Hülse 23 von hinten in die Durchgangsöffnung 22 des Dichtbleches 18 eingesetzt, bis sie an dem Dichtblech 18 anschlägt. Daraufhin wird die Durchgangsöffnung 22 mit der Ausnehmung 25 in Deckung gebracht, indem das Dichtblech 18 entsprechend in Umfangsrichtung U bewegt wird. Anschließend wird der Bolzen 24 mit dem Bolzenkopf 30 voran in die Hülse 23 eingesetzt, bis die Rastvorsprünge 32 des Bolzens 24 in die zugeordnete Rastvertiefung 29 der Hülse 23 einschnappt. Die hierdurch erzeugte Rastverbindung sichert den Bolzen 24 in axialer Richtung A, wie es in
Zum Lösen des Bolzens 24 müssen die von dem Dichtblech 18 auswärts vorstehenden Betätigungselemente 31 lediglich manuell oder unter Verwendung eines geeigneten Werkzeugs zusammengedrückt werden, woraufhin der Bolzen 24 aus der Hülse 23 entnommen werden kann.To release the
Ein wesentlicher Vorteil der zuvor beschriebenen Sicherungseinrichtungen 6, 21 der Radscheibenanordnungen 1, 16 besteht darin, dass sie die Dichtbleche 3, 18 in einfacher Art und Weise gegen eine Bewegung in Umfangsrichtung U sichern, ohne dass die Festigkeit der Radscheiben 2, 17 durch Kerbwirkung beeinträchtigt werden. An dieser Stelle sei darauf hingewiesen, dass die Ausnehmungen 9, 25 erfindungsgemäß alternativ oder zusätzlich auch an Schaufeleinrichtungen vorgesehen sein können, auch wenn dies vorliegend nicht dargestellt ist. Die Sicherungseinrichtungen 6, 21 sind ferner hinsichtlich ihres einfachen Aufbaus sowie hinsichtlich ihrer einfachen Montier- und Demontierbarkeit von Vorteil.A significant advantage of the above-described
Obwohl die Erfindung im Detail durch das bevorzugte Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.Although the invention has been illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed examples and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.
Claims (11)
- Wheel disk arrangement (1; 16) having a wheel disk (2; 17),
multiple blade devices which are attached along an outer circumference of the wheel disk (2; 17),
at least one sealing plate (3; 18) which is received between the wheel disk (2; 17) and the blade devices such that it can be displaced in the circumferential direction, and
at least one securing device (6; 21) designed so as to secure the sealing plate (3; 18) against displacement in the circumferential direction,
wherein
the securing device (6; 21) has a bolt (8; 24) extending through a through-opening (7; 22) which is provided in the sealing plate (3; 18) and a recess (9; 25) which is provided on the wheel disk (2; 17) or on a blade device and receives the free end of the bolt (8; 24), and whose wall limits movement of the bolt (8; 24) in the circumferential direction, characterized in that the bolt (8; 24) is secured to the sealing plate (3; 18) in the axial direction by a latching connection, so as to prevent undesired release. - Wheel disk arrangement (1; 16) according to Claim 1,
characterized in that
the recess (9; 25) is designed as a longitudinal slot extending transversely to the circumferential direction. - Wheel disk arrangement (1; 16) according to one of the preceding claims,
characterized in that
the latching connection comprises at least one latching depression (10; 29) and at least one latching projection (14; 32) which engage with one another in the radial direction. - Wheel disk arrangement (1; 16) according to Claim 3,
characterized in that
the at least one latching depression (10; 29) is annular. - Wheel disk arrangement (1; 16) according to Claim 3 or 4,
characterized in that
there are provided two radially mutually opposite latching projections (14; 32). - Wheel disk arrangement (1; 16) according to one of Claims 3 to 5,
characterized in that
at least one actuation element (13; 31), which can be actuated manually or using a tool, is provided on the bolt (8; 24) for the purpose of releasing the latching connection. - Wheel disk arrangement (1; 16) according to Claim 6,
characterized in that
the at least one actuation element (13; 31) is designed as a resilient arm projecting axially outward. - Wheel disk arrangement (1; 16) according to Claim 6 or 7,
characterized in that
the number of actuation elements (13; 31) corresponds to the number of latching projections (14; 32). - Wheel disk arrangement (1) according to one of the preceding claims,
characterized in that
the latching connection is provided between the bolt (8) and the sealing plate (3). - Wheel disk arrangement (16) according to one of Claims 1 to 8,
characterized in that
the latching connection is provided between the bolt (24) and a sleeve (23) which is inserted captively into the through-opening (22) provided in the sealing plate (18). - Wheel disk arrangement (16) according to Claim 10,
characterized in that
the sleeve (23) has, at its free end oriented toward the recess (25), at least one radially projecting stop which bears axially against the sealing plate (3; 18).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14191068.7A EP3015656A1 (en) | 2014-10-30 | 2014-10-30 | Wheel disc assembly |
PCT/EP2015/073261 WO2016066394A1 (en) | 2014-10-30 | 2015-10-08 | Wheel disc arrangement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3167163A1 EP3167163A1 (en) | 2017-05-17 |
EP3167163B1 true EP3167163B1 (en) | 2018-07-11 |
Family
ID=51845312
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14191068.7A Withdrawn EP3015656A1 (en) | 2014-10-30 | 2014-10-30 | Wheel disc assembly |
EP15778914.0A Not-in-force EP3167163B1 (en) | 2014-10-30 | 2015-10-08 | Wheel disc assembly |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14191068.7A Withdrawn EP3015656A1 (en) | 2014-10-30 | 2014-10-30 | Wheel disc assembly |
Country Status (3)
Country | Link |
---|---|
US (1) | US20170241284A1 (en) |
EP (2) | EP3015656A1 (en) |
WO (1) | WO2016066394A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2933436A1 (en) * | 2014-04-15 | 2015-10-21 | Siemens Aktiengesellschaft | Wheel disc with at least one sealing sheet metal panel |
EP2975219A1 (en) * | 2014-07-17 | 2016-01-20 | Siemens Aktiengesellschaft | Wheel disc assembly |
EP3564489A1 (en) * | 2018-05-03 | 2019-11-06 | Siemens Aktiengesellschaft | Rotor with for centrifugal forces optimized contact surfaces |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3501249A (en) * | 1968-06-24 | 1970-03-17 | Westinghouse Electric Corp | Side plates for turbine blades |
GB2043796B (en) * | 1979-03-10 | 1983-04-20 | Rolls Royce | Bladed rotor for gas turbine engine |
US5014934A (en) * | 1989-06-30 | 1991-05-14 | The Boeing Company | Removable seal for discontinuities in aircraft skin |
US5277548A (en) * | 1991-12-31 | 1994-01-11 | United Technologies Corporation | Non-integral rotor blade platform |
EP2218873A1 (en) * | 2009-02-17 | 2010-08-18 | Siemens Aktiengesellschaft | Rotor section for a rotor of a turbo machine, rotor blade for a turbo machine and blocking element |
US8459953B2 (en) * | 2010-01-19 | 2013-06-11 | General Electric Company | Seal plate and bucket retention pin assembly |
US9097270B2 (en) * | 2013-07-26 | 2015-08-04 | GM Global Technology Operations LLC | Snap fit fastener |
-
2014
- 2014-10-30 EP EP14191068.7A patent/EP3015656A1/en not_active Withdrawn
-
2015
- 2015-10-08 US US15/519,721 patent/US20170241284A1/en not_active Abandoned
- 2015-10-08 WO PCT/EP2015/073261 patent/WO2016066394A1/en active Application Filing
- 2015-10-08 EP EP15778914.0A patent/EP3167163B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
US20170241284A1 (en) | 2017-08-24 |
EP3167163A1 (en) | 2017-05-17 |
EP3015656A1 (en) | 2016-05-04 |
WO2016066394A1 (en) | 2016-05-06 |
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