EP3129599B1 - Wheel disc assembly - Google Patents

Wheel disc assembly Download PDF

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Publication number
EP3129599B1
EP3129599B1 EP15738025.4A EP15738025A EP3129599B1 EP 3129599 B1 EP3129599 B1 EP 3129599B1 EP 15738025 A EP15738025 A EP 15738025A EP 3129599 B1 EP3129599 B1 EP 3129599B1
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EP
European Patent Office
Prior art keywords
sealing plates
projection
wheel disk
disk assembly
designed
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EP15738025.4A
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German (de)
French (fr)
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EP3129599A1 (en
Inventor
Harald Hoell
Kevin KAMPKA
Karsten Kolk
Marc Lange
Peter Schröder
Vyacheslav Veitsman
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Siemens AG
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Siemens AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3007—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
    • 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
    • F05D2240/55—Seals

Definitions

  • the present invention relates to a wheel disc assembly having a wheel disc, a plurality of vane means secured along the outer periphery of the wheel disc, and a plurality of sealing plates held in two radially spaced apart annular grooves, the first annular groove provided in the wheel disc and axially outwardly through an annular projection is limited, and wherein the second annular groove is defined by a plurality of adjacently arranged annular groove segments, which are respectively provided in the individual blade means.
  • Wheel disc assemblies of the type mentioned are known in the prior art in a variety of configurations.
  • the blade devices are inserted into grooves of the wheel disc, wherein successively, the sealing plates are inserted into the two annular grooves.
  • all the sealing plates In order to install the last two vane devices, all the sealing plates must already be mounted and moved so far over their overlap areas in the annular grooves that the vane devices can be installed in the associated grooves of the wheel disc. Subsequently, the sealing plates are pushed in the circumferential direction back to its intended position and secured there against displacement suitable.
  • the recess in the rotor disk is closed by a closing part, which in turn is axially secured by the sealing plates.
  • the present invention provides a Radularnan extract of the aforementioned type, which is characterized in that at least one axially extending through the annular projection extending recess is provided whose minimum width in the circumferential direction is greater than the width of the sealing plates on the inner diameter, so in that a sealing plate can be inserted axially through the recess between the annular grooves and moved in the circumferential direction, and that at least one closure piece is provided, which is prepared for closing the recess and releasably attachable to the wheel disc, wherein the closure piece is held captive in the intended mounted state by a provided between the closure piece and at least one sealing plate positive locking in the axial direction captive.
  • the sealing plates can be threaded in a simple manner in the associated annular grooves, even if all blade devices are already mounted on the wheel disc, whereby the assembly is made very flexible. Also, the individual sealing plates can be removed easily in the service case through the recess without much effort. Thanks to the provided between the closure piece and at least one sealing plate positive locking additional securing elements for securing the closure piece in the assembled state are superfluous, whereby a very simple structure with few components is achieved.
  • the first annular groove is formed undercut and, viewed in cross-section, has at least one axially projecting retaining projection which is provided with a contact surface
  • the sealing plates each have at least one axially projecting protrusion in the region of the inner diameter viewed in cross-section
  • Supporting projection which is provided with a bearing surface, wherein the contact surface of the at least one retaining projection, the support surface of the at least one support projection and the height of the sealing plates are formed such that the wings of the sealing plates during normal operation of the Radusionnan extract under the action of centrifugal against support the contact surface of the at least one retaining projection.
  • the positive connection is realized by at least one radially projecting projection of the closure piece and at least one recess formed on the sealing plate, in which the projection engages in the intended mounted state.
  • the positive connection is realized by at least one radially projecting projection from the sealing plate and at least one recess formed on the closure piece, in which the projection engages in the intended mounted state.
  • the at least one recess is designed as a ring-segment-shaped groove extending in the circumferential direction and the at least one projection is designed as a ring-segment-shaped web extending in the circumferential direction, whereby a simple structure is achieved.
  • the first annular groove seen in cross-section two axially opposite and mutually facing retaining projections, which are each provided with a contact surface, and the sealing plates include in the region of the inner diameter in cross section considered two corresponding to the retaining projections formed axially opposing and facing away from each other support projections, each provided with a support surface, wherein the contact surfaces and the support surfaces are formed such that support the supporting surfaces of the sealing plates during normal operation of the Radusionnanowski extract under the action of a centrifugal force against the contact surfaces of the retaining projections.
  • the weight of the sealing plates is distributed more uniformly during normal operation, whereby a better stability and force introduction into the wheel disc is achieved.
  • the contact surface of the at least one holding projection and the support surfaces of the sealing plates each extend both transversely to the radial direction and transversely to the axial direction.
  • the contact surfaces and the wings are each inclined.
  • the side surfaces of the sealing plates extend at least partially transversely to the axial direction and are formed such that the sealing plates overlap in the intended state with respect to the axial direction in the region of their side surfaces. In this way, a sealing effect is achieved between the side surfaces adjacent arranged sealing plates in the axial direction.
  • the side surfaces of the sealing plates are stepped, so that the sealing plates can be displaced relative to each other by a predetermined amount while maintaining an overlap in the circumferential direction.
  • the grading should be chosen such that the sealing plates in a state in which all the sealing plates of a Radularnanowski are mounted, can be pushed together so that between two adjacent sealing plates arranged a distance can be set, which is greater than the width of a single sealing plate.
  • Such a configuration may be advantageous depending on the type of mounting of the sealing sheets, as will become apparent from the embodiment described below with reference to the figures.
  • the at least one closure piece on opposite sides radially outwardly projecting Ver gleich Swissvorsprünge, which engage in the intended state in correspondingly formed pockets of the recess.
  • the closure piece can be secured in the circumferential direction of the wheel disc.
  • FIGS. 1 to 4 show a wheel disc assembly 1 according to an embodiment of the present invention or components thereof.
  • the wheel disc assembly 1 comprises a Wheel disc 2, a plurality of blade means 3, which are fixed along the outer periphery of the wheel disc 2, and a plurality of sealing plates 4, which are held between the wheel disc 2 and the blade means 3 in two radially spaced annular grooves 5 and 6.
  • the first annular groove 5 is provided in the wheel disc 2 and is limited axially outwardly by an annular projection 7.
  • the second annular groove 6 is defined by a plurality of adjacently arranged annular groove segments which are respectively formed in the blade devices 3.
  • the wheel disc 2 comprises at least one axially extending through the annular projection 7 through recess 8, the minimum width in the circumferential direction is greater than the width of the sealing plates 4 at the inner diameter. Accordingly, the sealing plates 4 can be axially inserted through the recess 8 between the annular grooves 5 and 6 and moved in the circumferential direction of these.
  • the wheel disc assembly 1 also comprises a closure piece 9, which can be releasably secured to the wheel disc 2.
  • the provided on the wheel disc 2 first annular groove 5 is formed undercut and, viewed in cross section has two axially opposite and mutually facing retaining projections 10, which are each provided with a contact surface 11.
  • the sealing plates 4 comprise in the region of their inner diameter in cross-section two corresponding to the holding projections 10 formed axially opposite each other and facing away from each other supporting projections 12, which are each provided with a support surface 13.
  • the holding projections 10 and the supporting projections 12 each extend transversely to the radial direction R as well as transversely to the axial direction A and are presently arranged on the bisecting line, although other inclinations are possible.
  • the contact surfaces 11 of the retaining projections 10, the support surfaces 13 of the support projections 12 and the height of the sealing plates 4 are formed or selected such that the support surfaces 13 of the sealing plates 4 during normal operation of the Support wheel disc assembly 1 under the action of centrifugal force against the contact surfaces 11 of the holding projections 10.
  • the side surfaces 14 of the sealing plates 4 extend at least partially transversely to the axial device A and are formed such that the sealing plates 4 overlap in their intended condition with respect to the axial direction A in the region of their side surfaces 14.
  • the side surfaces 14 of the sealing plates 4 are stepped, so that adjacent arranged and overlapping sealing plates 4 can be displaced in the radial direction while maintaining the overlap.
  • the degree of overlap is selected such that the sealing sheets 4 are mounted in a state in which all the sealing sheets 4 are mounted on the wheel disc assembly 1, as shown in FIG FIG. 1 is shown, can slide into one another such that between two adjacently arranged sealing plates 4, a distance can be set, which is greater than the maximum width of the sealing plates 4.
  • the recess 8 comprises pockets 15 arranged on both sides, which extend axially through the entire annular projection 7 and form undercuts in the radial direction.
  • the closure piece 9 comprises correspondingly formed to the pockets 15, radially outwardly projecting VerMAN Swissvorsprünge 16 which engage in the intended condition of the closure piece 9 in the pockets 15, whereby a securing of the closure piece 9 is achieved in the radial direction.
  • the closure piece 9 further comprises a receiving surface 17 which serves to receive at least one sealing plate 4. In the area of the receiving surface 17, the closure piece 9 has a web 18 extending in the radial direction, which engages in the intended state in correspondingly formed, provided on the inner diameter of the sealing plates 4 grooves 19 of the sealing plates 4.
  • the sealing plates 4 are moved in the circumferential direction in its intended position.
  • the grooves 19 of the sealing plates of two adjacent sealing plates 4 are each partially brought into positive engagement with the protruding from the receiving surface 17 of the closure piece 9 web 18.
  • the sealing plates 4 are fixed by suitable means in their intended circumferential position.
  • a fixation for example, using bolts not shown in detail, which extend through provided in the sealing plates 4, extending in the radial direction elongated holes and fixed to the wheel disc 2.
  • the slots are used to allow movement of the sealing plates 4 during normal operation of the wheel disc assembly 1 in the radial direction.
  • a significant advantage of the wheel disc assembly 1 is that the sealing plates 4 can be easily and easily assembled and disassembled, even if the blade devices 3 already or still on the wheel disc 2 are fixed. Further, the contact surfaces 11 of the retaining projections 10, the support surfaces 13 of the support projections 12 and the height of the sealing plates 4 are formed such that the support surfaces 13 of the sealing plates 4 during normal operation of the Radusionnan Aunt 1 under the action of centrifugal force against the contact surface 11 of the retaining projections 10 support. Thus, the weight of the sealing plates 4 is taken up by the wheel disc 2, resulting in that the connection areas between the wheel disc 2 and the blade means 3 must be less stable and thus can be produced more cheaply.
  • the closure piece 9 is due to the positive connection between the web 18 of the closure piece 9 and the grooves 19 of the sealing plates 4 secured in a simple manner without additional securing elements in its intended position, whereby a total of a simple structure is achieved.
  • said positive connection can also be achieved by means of a depression provided on the closure piece 9 and projections or webs projecting radially from the sealing plates 4.
  • FIG. 5 it is basically sufficient to provide a single retaining projection 10 and a single support projection 12, as in FIG. 5 is shown in the same or similar components with the same reference numerals as in the FIGS. 1 to 4 are provided. Otherwise, the in FIG. 5 shown arrangement of that arrangement, previously with reference to the FIGS. 2 to 4 has been described.
  • FIG. 6 shows a further alternative embodiment of the in the FIGS. 2 to 4 arrangement shown, which differs only to the effect that for axial securing of the closure piece 9 on sealing plates 4 radially inwardly projecting webs 20 are formed and on the closure piece. 9 a correspondingly formed groove 21 is provided, whereby a positive connection between the closure piece 9 and the sealing plates is achieved in the intended mounted state.
  • the arrangements correspond to each other, which is why identical or similar components are provided with the same reference numerals.

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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 des Außenumfangs der Radscheibe befestigt sind, und mehreren Dichtblechen, die in zwei radial voneinander beabstandeten Ringnuten gehalten sind, wobei die erste Ringnut in der Radscheibe vorgesehen und axial auswärts durch einen Ringvorsprung begrenzt ist, und wobei die zweite Ringnut durch eine Vielzahl von benachbart angeordneten Ringnutsegmenten definiert ist, die jeweils in den einzelnen Schaufeleinrichtungen vorgesehen sind.The present invention relates to a wheel disc assembly having a wheel disc, a plurality of vane means secured along the outer periphery of the wheel disc, and a plurality of sealing plates held in two radially spaced apart annular grooves, the first annular groove provided in the wheel disc and axially outwardly through an annular projection is limited, and wherein the second annular groove is defined by a plurality of adjacently arranged annular groove segments, which are respectively provided in the individual blade means.

Radscheibenanordnungen der eingangs genannten Art sind im Stand der Technik in unterschiedlichsten Ausgestaltungen bekannt. Während der Montage werden die Schaufeleinrichtungen in Nuten der Radscheibe eingeschoben, wobei sukzessiv auch die Dichtbleche in die beiden Ringnuten eingesetzt werden. Um die letzten beiden Schaufeleinrichtungen einbauen zu können, müssen sämtliche Dichtbleche bereits montiert und soweit über ihre Überlappungsbereiche in den Ringnuten verschoben sein, dass die Schaufeleinrichtungen in die zugeordneten Nuten der Radscheibe eingebaut werden können. Anschließend werden die Dichtbleche in Umfangsrichtung wieder zurück in ihre bestimmungsgemäße Position geschoben und dort gegen ein Verschieben geeignet gesichert.Wheel disc assemblies of the type mentioned are known in the prior art in a variety of configurations. During assembly, the blade devices are inserted into grooves of the wheel disc, wherein successively, the sealing plates are inserted into the two annular grooves. In order to install the last two vane devices, all the sealing plates must already be mounted and moved so far over their overlap areas in the annular grooves that the vane devices can be installed in the associated grooves of the wheel disc. Subsequently, the sealing plates are pushed in the circumferential direction back to its intended position and secured there against displacement suitable.

Ein Nachteil der bekannten Radscheibenanordnungen besteht darin, dass sich die Dichtbleche im Servicefall nur schwer demontieren lassen, da zunächst zwei benachbarte Schaufeleinrichtungen ausgebaut werden müssen, was in der Praxis mit einem erheblichen Aufwand einhergeht.A disadvantage of the known Radscheibenanordnungen is that the sealing plates difficult to dismantle in case of service, since initially two adjacent blade devices must be removed, which is associated in practice with considerable effort.

Aus der US 5,662,458 A ist eine weitere Ausführung zur Anordnung von Dichtblechen vor der Stirnseite einer Rotorscheibe bekannt. Hierbei weist die Rotorscheibe eine umlaufende innere Ringnut auf und radial gegenüberliegend bilden jeweils Schaufelplattformen der einzelnen Laufschaufeln einen Abschnitt einer äußeren Ringnut. Die Montage der einzelnen Dichtbleche, welche in der inneren Ringut und der äußeren Ringnut gehalten sind, wird dadurch ermöglicht, indem in der Rotorscheibe in einer Flanke der inneren Ringnut eine Aussparung vorhanden ist, welche das Einfädeln der Dichtbleche ermöglicht.From the US 5,662,458 A is a further embodiment for the arrangement of sealing plates in front of the front side of a Rotor disc known. In this case, the rotor disk has a circumferential inner annular groove and radially opposite blade platforms of the individual rotor blades form a section of an outer annular groove. The assembly of the individual sealing plates, which are held in the inner annular groove and the outer annular groove is made possible by a recess in the rotor disc in a flank of the inner annular groove is present, which allows the threading of the sealing plates.

Die Aussparung in der Rotorscheibe wird durch ein Schließteil geschlossen, welches wiederum durch die Dichtbleche axial gesichert ist.The recess in the rotor disk is closed by a closing part, which in turn is axially secured by the sealing plates.

Wenngleich vorgenannte Ausführung eine einfache Montage ermöglichen, so hat die Ausführung jedoch den Nachteil, dass sich die Fliehkräfte der Dichtbleche an den Laufschaufeln abstützen. Wenngleich das Schließteil nur eine geringere Masse aufweist, so werden dessen Fließkräfte über die haltenden Dichtbleche übertragen, so dass es an den Laufschaufeln zu einer ungleichmäßigen Belastung kommt.Although the aforementioned embodiment allow easy installation, but the design has the disadvantage that the centrifugal forces of the sealing plates are supported on the blades. Although the closing part has only a lower mass, so its flow forces are transmitted through the holding sealing plates, so that it comes to the blades to an uneven load.

Ausgehend von diesem Stand der Technik ist es eine Aufgabe der vorliegenden Erfindung, eine Radscheibenanordnung der eingangs genannten Art zu schaffen, bei der sich die Dichtbleche leicht demontieren und wieder montieren lassen und eine ungleichmäßige Belastung der Laufschaufeln vermieden wird.Based on this prior art, it is an object of the present invention to provide a Radscheibenanordnung of the aforementioned type, in which the sealing plates can be easily disassembled and re-assemble and uneven loading of the blades is avoided.

Zur Lösung dieser Aufgabe schafft die vorliegende Erfindung eine Radscheibenanordnung der eingangs genannten Art, die dadurch gekennzeichnet ist, dass zumindest eine sich axial durch den Ringvorsprung hindurch erstreckende Ausnehmung vorgesehen ist, deren minimale Breite in Umfangsrichtung größer als die Breite der Dichtbleche am Innendurchmesser ist, so dass ein Dichtblech axial durch die Ausnehmung zwischen den Ringnuten eingesetzt und in Umfangsrichtung von diesen geführt bewegt werden kann, und dass wenigstens ein Verschlussstück vorgesehen ist, das zum Verschließen der Ausnehmung hergerichtet und lösbar an der Radscheibe befestigbar ist, wobei das Verschlussstück im bestimmungsgemäß montierten Zustand durch einen zwischen dem Verschlussstück und zumindest einem Dichtblech vorgesehenen Formschluss in axialer Richtung verliersicher gehalten ist. Dank der erfindungsgemäßen Ausnehmung können die Dichtbleche in einfacher Art und Weise in die zugeordneten Ringnuten eingefädelt werden, selbst wenn bereits sämtliche Schaufeleinrichtungen an der Radscheibe montiert sind, wodurch die Montage sehr flexibel gestaltet wird. Auch lassen sich die einzelnen Dichtbleche im Servicefall durch die Ausnehmung problemlos ohne großen Aufwand wieder entnehmen. Dank des zwischen dem Verschlussstück und zumindest einem Dichtblech vorgesehenen Formschlusses sind zusätzliche Sicherungselemente zum Sichern des Verschlussstückes im montierten Zustand überflüssig, wodurch ein sehr einfacher Aufbau mit wenigen Bauteilen erzielt wird.To achieve this object, the present invention provides a Radscheibenanordnung of the aforementioned type, which is characterized in that at least one axially extending through the annular projection extending recess is provided whose minimum width in the circumferential direction is greater than the width of the sealing plates on the inner diameter, so in that a sealing plate can be inserted axially through the recess between the annular grooves and moved in the circumferential direction, and that at least one closure piece is provided, which is prepared for closing the recess and releasably attachable to the wheel disc, wherein the closure piece is held captive in the intended mounted state by a provided between the closure piece and at least one sealing plate positive locking in the axial direction captive. Thanks to the recess according to the invention, the sealing plates can be threaded in a simple manner in the associated annular grooves, even if all blade devices are already mounted on the wheel disc, whereby the assembly is made very flexible. Also, the individual sealing plates can be removed easily in the service case through the recess without much effort. Thanks to the provided between the closure piece and at least one sealing plate positive locking additional securing elements for securing the closure piece in the assembled state are superfluous, whereby a very simple structure with few components is achieved.

Erfindungsgemäß ist die erste Ringnut hinterschnitten ausgebildet und weist im Querschnitt betrachtet zumindest einen axial vorstehenden Haltevorsprung auf, der mit einer Anlagefläche versehen ist, und die Dichtbleche weisen im Bereich des Innendurchmessers im Querschnitt betrachtet jeweils zumindest einen korrespondierend zu dem zumindest einen Haltevorsprung ausgebildeten, axial vorstehenden Tragvorsprung auf, der mit einer Tragfläche versehen ist, wobei die Anlagefläche des zumindest einen Haltevorsprungs, die Tragfläche des zumindest einen Tragvorsprungs und die Höhe der Dichtbleche derart ausgebildet sind, dass sich die Tragflächen der Dichtbleche während des bestimmungsgemäßen Betriebs der Radscheibenanordnung unter Einwirkung einer Fliehkraft gegen die Anlagefläche des zumindest einen Haltevorsprungs abstützen. Dank dieser Ausgestaltung wird das Eigengewicht der Dichtbleche während des bestimmungsgemäßen Betriebs der Radscheibenanordnung unter Einwirkung einer Fliehkraft durch den zumindest einen Haltevorsprung der Radscheibe aufgenommen. Damit werden die Verbindungen zwischen der Radscheibe und den Schaufeleinrichtungen entlastet, da die Fliehkraftbelastung von den Dichtblechen "entkoppelt" wird. Dies führt dazu, dass die Radscheibe in den besagten Verbindungsbereichen zu den Schaufeleinrichtungen dünner ausgestaltet werden kann. Gleiches gilt auch für die Plattformen der Schaufeleinrichtungen, mit denen die Schaufeleinrichtungen an der Radscheibe gehalten sind, da diese das Eigengewicht der Dichtbleche nicht aufnehmen müssen. Insgesamt ergibt sich auf diese Weise ein sehr kostengünstiger Aufbau.According to the invention, the first annular groove is formed undercut and, viewed in cross-section, has at least one axially projecting retaining projection which is provided with a contact surface, and the sealing plates each have at least one axially projecting protrusion in the region of the inner diameter viewed in cross-section Supporting projection, which is provided with a bearing surface, wherein the contact surface of the at least one retaining projection, the support surface of the at least one support projection and the height of the sealing plates are formed such that the wings of the sealing plates during normal operation of the Radscheibenanordnung under the action of centrifugal against support the contact surface of the at least one retaining projection. Thanks to this configuration, the weight of the sealing plates during normal operation of the Radscheibenanordnung under the action of a centrifugal force is absorbed by the at least one retaining projection of the wheel disc. This will be the connections between the wheel disc and the blade means relieved, since the centrifugal load is "decoupled" from the sealing plates. This results in that the wheel disc can be made thinner in the said connection areas to the blade devices. The same applies to the platforms of the blade means with which the blade means are held on the wheel disc, as they do not have to take the weight of the sealing plates. Overall, this results in a very cost-effective design.

Gemäß einer Ausgestaltung der vorliegenden Erfindung ist der Formschluss durch zumindest einen von dem Verschlussstück radial vorstehenden Vorsprung und zumindest eine an dem Dichtblech ausgebildete Vertiefung realisiert, in die der Vorsprung im bestimmungsgemäß montierten Zustand greift.According to one embodiment of the present invention, the positive connection is realized by at least one radially projecting projection of the closure piece and at least one recess formed on the sealing plate, in which the projection engages in the intended mounted state.

Gemäß einer alternativen Ausgestaltung der vorliegenden Erfindung ist der Formschluss durch zumindest einen von dem Dichtblech radial vorstehenden Vorsprung und zumindest eine an dem Verschlussstück ausgebildete Vertiefung realisiert, in die der Vorsprung im bestimmungsgemäß montierten Zustand greift.According to an alternative embodiment of the present invention, the positive connection is realized by at least one radially projecting projection from the sealing plate and at least one recess formed on the closure piece, in which the projection engages in the intended mounted state.

Vorteilhaft ist die zumindest eine Vertiefung als sich in Umfangsrichtung erstreckende ringsegmentförmige Nut und der zumindest eine Vorsprung als sich in Umfangsrichtung erstreckender ringsegmentförmiger Steg ausgebildet, wodurch ein einfacher Aufbau erzielt wird.Advantageously, the at least one recess is designed as a ring-segment-shaped groove extending in the circumferential direction and the at least one projection is designed as a ring-segment-shaped web extending in the circumferential direction, whereby a simple structure is achieved.

Gemäß einer Ausgestaltung der vorliegenden Erfindung weist die erste Ringnut im Querschnitt betrachtet zwei axial einander gegenüberliegende und zueinander weisende Haltevorsprünge auf, die jeweils mit einer Anlagefläche versehen sind, und die Dichtbleche umfassen im Bereich des Innendurchmessers im Querschnitt betrachtet zwei korrespondierend zu den Haltevorsprüngen ausgebildete, axial einander gegenüberliegende und voneinander weg weisende Tragvorsprünge, die jeweils mit einer Tragfläche versehen sind, wobei die Anlageflächen und die Tragflächen derart ausgebildet sind, dass sich die Tragflächen der Dichtbleche während des bestimmungsgemäßen Betriebs der Radscheibenanordnung unter Einwirkung einer Fliehkraft gegen die Anlageflächen der Haltevorsprünge abstützen. Durch das Vorsehen eines weiteren Haltevorsprungs und eines weiteren Tragvorsprungs wird das Gewicht der Dichtbleche während des bestimmungsgemäßen Betriebs gleichmäßiger verteilt, wodurch eine bessere Stabilität und Krafteinleitung in die Radscheibe erzielt wird.According to one embodiment of the present invention, the first annular groove seen in cross-section two axially opposite and mutually facing retaining projections, which are each provided with a contact surface, and the sealing plates include in the region of the inner diameter in cross section considered two corresponding to the retaining projections formed axially opposing and facing away from each other support projections, each provided with a support surface, wherein the contact surfaces and the support surfaces are formed such that support the supporting surfaces of the sealing plates during normal operation of the Radscheibenanordnung under the action of a centrifugal force against the contact surfaces of the retaining projections. By providing a further holding projection and a further supporting projection, the weight of the sealing plates is distributed more uniformly during normal operation, whereby a better stability and force introduction into the wheel disc is achieved.

Bevorzugt erstrecken sich die Anlagefläche des zumindest einen Haltevorsprungs und die Tragflächen der Dichtbleche jeweils sowohl quer zur radialen Richtung als auch quer zur axialen Richtung. Mit anderen Worten sind die Anlageflächen sowie die Tragflächen jeweils geneigt.Preferably, the contact surface of the at least one holding projection and the support surfaces of the sealing plates each extend both transversely to the radial direction and transversely to the axial direction. In other words, the contact surfaces and the wings are each inclined.

Vorteilhaft erstrecken sich die Seitenflächen der Dichtbleche zumindest teilweise quer zur axialen Richtung und sind derart ausgebildet, dass sich die Dichtbleche im bestimmungsgemäßen Zustand in Bezug auf die axiale Richtung im Bereich ihrer Seitenflächen überlappen. Auf diese Weise wird zwischen den Seitenflächen benachbart angeordneter Dichtbleche in axialer Richtung eine Dichtwirkung erzielt.Advantageously, the side surfaces of the sealing plates extend at least partially transversely to the axial direction and are formed such that the sealing plates overlap in the intended state with respect to the axial direction in the region of their side surfaces. In this way, a sealing effect is achieved between the side surfaces adjacent arranged sealing plates in the axial direction.

Vorteilhaft sind die Seitenflächen der Dichtbleche gestuft ausgebildet, so dass die Dichtbleche unter Beibehaltung einer Überlappung in der Umfangsrichtung zueinander um ein vorbestimmtes Maß verschoben werden können. Die Stufung sollte derart gewählt werden, dass die Dichtbleche in einem Zustand, in dem sämtliche Dichtbleche einer Radscheibenanordnung montiert sind, derart zusammengeschoben werden können, dass zwischen zwei benachbart angeordneten Dichtblechen ein Abstand eingestellt werden kann, der größer als die Breite eines einzelnen Dichtbleches ist. Eine solche Ausgestaltung kann in Abhängigkeit von der Art der Montage der Dichtbleche von Vorteil sein, wie es anhand der nachfolgend unter Bezugnahme auf die Figuren beschriebenen Ausführungsform deutlich wird. Bevorzugt weist das zumindest eine Verschlussstück an gegenüberliegenden Seiten radial auswärts vorstehende Verschlussstückvorsprünge auf, die im bestimmungsgemäßen Zustand in korrespondierend ausgebildete Taschen der Ausnehmung greifen. Auf diese Weise lässt sich das Verschlussstück in Umfangsrichtung an der Radscheibe sichern.Advantageously, the side surfaces of the sealing plates are stepped, so that the sealing plates can be displaced relative to each other by a predetermined amount while maintaining an overlap in the circumferential direction. The grading should be chosen such that the sealing plates in a state in which all the sealing plates of a Radscheibenanordnung are mounted, can be pushed together so that between two adjacent sealing plates arranged a distance can be set, which is greater than the width of a single sealing plate. Such a configuration may be advantageous depending on the type of mounting of the sealing sheets, as will become apparent from the embodiment described below with reference to the figures. Preferably, the at least one closure piece on opposite sides radially outwardly projecting Verschlussstückvorsprünge, which engage in the intended state in correspondingly formed pockets of the recess. In this way, the closure piece can be secured in the circumferential direction of the wheel disc.

Weitere Merkmale und Vorteile der vorliegenden Erfindung werden anhand der nachfolgenden Beschreibung verschiedener Ausführungsformen von Radscheibenanordnungen gemäß der vorliegenden Erfindung unter Bezugnahme auf die beiliegende Zeichnung deutlich. Darin ist

Figur 1
eine perspektivische Ansicht einer Radscheibenanordnung gemäß einer Ausführungsform der vorliegenden Erfindung im fertig montierten Zustand;
Figur 2
eine vergrößerte Schnittansicht im Bereich des Verschlussstücks;
Figur 3
eine vergrößerte Seitenansicht der in Figur 2 dargestellten Anordnung;
Figur 4
eine vergrößerte Ansicht der in Figur 2 dargestellten Anordnung, wobei ein Verschlussstück zu Darstellungszwecken weggelassen ist;
Figur 5
eine vergrößerte Seitenansicht einer alternativen erfindungsgemäßen Ausführungsform der in den Figuren 2 bis 4 dargestellten Anordnung; und
Figur 6
eine vergrößerte Seitenansicht einer weiteren alternativen erfindungsgemäßen Ausführungsform der in den Figuren 2 bis 4 dargestellten Anordnung.
Further features and advantages of the present invention will become apparent from the following description of various embodiments of wheel disc assemblies according to the present invention with reference to the accompanying drawings. That's it
FIG. 1
a perspective view of a Radscheibenanordnung according to an embodiment of the present invention in the assembled state;
FIG. 2
an enlarged sectional view in the region of the closure piece;
FIG. 3
an enlarged side view of the in FIG. 2 arrangement shown;
FIG. 4
an enlarged view of the in FIG. 2 illustrated arrangement, wherein a closure piece is omitted for illustrative purposes;
FIG. 5
an enlarged side view of an alternative embodiment of the invention in the FIGS. 2 to 4 arrangement shown; and
FIG. 6
an enlarged side view of another alternative embodiment of the invention in the FIGS. 2 to 4 illustrated arrangement.

Die Figuren 1 bis 4 zeigen eine Radscheibenanordnung 1 gemäß einer Ausführungsform der vorliegenden Erfindung bzw. Komponenten derselben. Die Radscheibenanordnung 1 umfasst eine Radscheibe 2, mehrere Schaufeleinrichtungen 3, die entlang des Außenumfangs der Radscheibe 2 befestigt sind, und mehrere Dichtbleche 4, die zwischen der Radscheibe 2 und den Schaufeleinrichtungen 3 in zwei radial voneinander beabstandeten Ringnuten 5 und 6 gehalten sind. Die erste Ringnut 5 ist dabei in der Radscheibe 2 vorgesehen und wird axial auswärts durch einen Ringvorsprung 7 begrenzt. Die zweite Ringnut 6 ist durch eine Vielzahl von benachbart angeordneten Ringnutsegmenten definiert, die jeweils in den Schaufeleinrichtungen 3 ausgebildet sind. Zur Erleichterung der Montage der Dichtbleche 4 umfasst die Radscheibe 2 zumindest eine sich axial durch den Ringvorsprung 7 hindurch erstreckende Ausnehmung 8, deren minimale Breite in Umfangsrichtung größer als die Breite der Dichtbleche 4 am Innendurchmesser ist. Entsprechend können die Dichtbleche 4 axial durch die Ausnehmung 8 zwischen den Ringnuten 5 und 6 eingesetzt und in Umfangsrichtung von diesen geführt bewegt werden. Zum Verschließen der Ausnehmung 8 umfasst die Radscheibenanordnung 1 zudem ein Verschlussstück 9, das lösbar an der Radscheibe 2 befestigt werden kann.The FIGS. 1 to 4 show a wheel disc assembly 1 according to an embodiment of the present invention or components thereof. The wheel disc assembly 1 comprises a Wheel disc 2, a plurality of blade means 3, which are fixed along the outer periphery of the wheel disc 2, and a plurality of sealing plates 4, which are held between the wheel disc 2 and the blade means 3 in two radially spaced annular grooves 5 and 6. The first annular groove 5 is provided in the wheel disc 2 and is limited axially outwardly by an annular projection 7. The second annular groove 6 is defined by a plurality of adjacently arranged annular groove segments which are respectively formed in the blade devices 3. To facilitate the assembly of the sealing plates 4, the wheel disc 2 comprises at least one axially extending through the annular projection 7 through recess 8, the minimum width in the circumferential direction is greater than the width of the sealing plates 4 at the inner diameter. Accordingly, the sealing plates 4 can be axially inserted through the recess 8 between the annular grooves 5 and 6 and moved in the circumferential direction of these. For closing the recess 8, the wheel disc assembly 1 also comprises a closure piece 9, which can be releasably secured to the wheel disc 2.

Die an der Radscheibe 2 vorgesehene erste Ringnut 5 ist hinterschnitten ausgebildet und weist im Querschnitt betrachtet zwei axial einander gegenüberliegende und zueinander weisende Haltevorsprünge 10 auf, die jeweils mit einer Anlagefläche 11 versehen sind. Die Dichtbleche 4 umfassen im Bereich ihres Innendurchmessers im Querschnitt betrachtet zwei korrespondierend zu den Haltevorsprüngen 10 ausgebildete, axial einander gegenüber und voneinander weg weisende Tragvorsprünge 12, die jeweils mit einer Tragfläche 13 versehen sind. Die Haltevorsprünge 10 und die Tragvorsprünge 12 erstrecken sich jeweils sowohl quer zur radialen Richtung R als auch quer zur axialen Richtung A und sind vorliegend auf der Winkelhalbierenden angeordnet, wobei auch andere Neigungen möglich sind. Die Anlageflächen 11 der Haltevorsprünge 10, die Tragflächen 13 der Tragvorsprünge 12 und die Höhe der Dichtbleche 4 sind derart ausgebildet bzw. gewählt, dass sich die Tragflächen 13 der Dichtbleche 4 während des bestimmungsgemäßen Betriebs der Radscheibenanordnung 1 unter Einwirkung einer Fliehkraft gegen die Anlageflächen 11 der Haltevorsprünge 10 abstützen.The provided on the wheel disc 2 first annular groove 5 is formed undercut and, viewed in cross section has two axially opposite and mutually facing retaining projections 10, which are each provided with a contact surface 11. The sealing plates 4 comprise in the region of their inner diameter in cross-section two corresponding to the holding projections 10 formed axially opposite each other and facing away from each other supporting projections 12, which are each provided with a support surface 13. The holding projections 10 and the supporting projections 12 each extend transversely to the radial direction R as well as transversely to the axial direction A and are presently arranged on the bisecting line, although other inclinations are possible. The contact surfaces 11 of the retaining projections 10, the support surfaces 13 of the support projections 12 and the height of the sealing plates 4 are formed or selected such that the support surfaces 13 of the sealing plates 4 during normal operation of the Support wheel disc assembly 1 under the action of centrifugal force against the contact surfaces 11 of the holding projections 10.

Die Seitenflächen 14 der Dichtbleche 4 erstrecken sich zumindest teilweise quer zur axialen Einrichtung A und sind derart ausgebildet, dass sich die Dichtbleche 4 in bestimmungsgemäßen Zustand in Bezug auf die axiale Richtung A im Bereich ihrer Seitenflächen 14 überlappen. Vorliegend sind die Seitenflächen 14 der Dichtbleche 4 gestuft ausgebildet, so dass sich benachbart angeordnete und einander überlappende Dichtbleche 4 in radialer Richtung unter Beibehaltung der Überlappung verschieben lassen. Das Maß der Überlappung ist derart gewählt, dass sich die Dichtbleche 4 in einem Zustand, in dem sämtliche Dichtbleche 4 an der Radscheibenanordnung 1 montiert sind, wie es in Figur 1 gezeigt ist, derart ineinander schieben lassen, dass zwischen zwei benachbart angeordneten Dichtblechen 4 ein Abstand eingestellt werden kann, der größer als die maximale Breite der Dichtbleche 4 ist.The side surfaces 14 of the sealing plates 4 extend at least partially transversely to the axial device A and are formed such that the sealing plates 4 overlap in their intended condition with respect to the axial direction A in the region of their side surfaces 14. In the present case, the side surfaces 14 of the sealing plates 4 are stepped, so that adjacent arranged and overlapping sealing plates 4 can be displaced in the radial direction while maintaining the overlap. The degree of overlap is selected such that the sealing sheets 4 are mounted in a state in which all the sealing sheets 4 are mounted on the wheel disc assembly 1, as shown in FIG FIG. 1 is shown, can slide into one another such that between two adjacently arranged sealing plates 4, a distance can be set, which is greater than the maximum width of the sealing plates 4.

Die Ausnehmung 8 umfasst beidseitig angeordnete Taschen 15, die sich axial durch den gesamten Ringvorsprung 7 erstrecken und in radialer Richtung Hinterschneidungen bilden. Das Verschlussstück 9 umfasst korrespondierend zu den Taschen 15 ausgebildete, radial auswärts vorstehende Verschlussstückvorsprünge 16, die im bestimmungsgemäß angeordneten Zustand des Verschlussstückes 9 in die Taschen 15 greifen, wodurch in radialer Richtung eine Sicherung des Verschlussstückes 9 erzielt wird. Das Verschlussstück 9 umfasst ferner eine Aufnahmefläche 17, die zur Aufnahme zumindest eines Dichtbleches 4 dient. Im Bereich der Aufnahmefläche 17 weist das Verschlussstück 9 einen sich in radialer Richtung erstreckenden Steg 18 auf, der im bestimmungsgemäßem Zustand in korrespondierend ausgebildete, am Innendurchmesser der Dichtbleche 4 vorgesehene Nuten 19 der Dichtbleche 4 greift.The recess 8 comprises pockets 15 arranged on both sides, which extend axially through the entire annular projection 7 and form undercuts in the radial direction. The closure piece 9 comprises correspondingly formed to the pockets 15, radially outwardly projecting Verschlussstückvorsprünge 16 which engage in the intended condition of the closure piece 9 in the pockets 15, whereby a securing of the closure piece 9 is achieved in the radial direction. The closure piece 9 further comprises a receiving surface 17 which serves to receive at least one sealing plate 4. In the area of the receiving surface 17, the closure piece 9 has a web 18 extending in the radial direction, which engages in the intended state in correspondingly formed, provided on the inner diameter of the sealing plates 4 grooves 19 of the sealing plates 4.

Zur Montage der in Figur 1 dargestellten Radscheibenanordnung 1 werden in einem ersten Schritt sämtliche Schaufeleinrichtungen 3 in bekannter Weise an der Radscheibe 2 befestigt. Anschließend werden die einzelnen Dichtbleche 4 der Reihe nach axial durch die Ausnehmung 8 in die Ringnuten 5 und 6 eingeführt und dann in Umfangsrichtung verschoben und dicht an dicht angeordnet. Dank der gestuften Ausbildung der Seitenflächen 14 der Dichtbleche 4 ist es dabei möglich, dass nach der Montage sämtlicher Dichtbleche 4 der Bereich der Ausnehmung 8 dichtblechfrei bleibt. In einem weiteren Schritt wird nunmehr das Verschlussstück 9 axial in die Ausnehmung 8 eingeschoben, wobei die Verschlussstückvorsprünge 16 mit den Taschen 15 des Ringvorsprungs 7 in Eingriff kommen, wodurch eine radiale Sicherung des Verschlussstückes 9 erzielt wird. In einem sich anschließenden Schritt werden die Dichtbleche 4 in Umfangsrichtung in ihre bestimmungsgemäße Position verschoben. Dabei werden die Nuten 19 der Dichtbleche zweier benachbarter Dichtbleche 4 jeweils teilweise mit dem von der Aufnahmefläche 17 des Verschlussstückes 9 vorstehenden Steg 18 formschlüssig in Eingriff gebracht. In einem weiteren Schritt werden die Dichtbleche 4 durch geeignete Mittel in ihrer bestimmungsgemäßen Umfangsposition fixiert. So kann eine Fixierung beispielsweise unter Verwendung nicht näher dargestellter Bolzen erfolgen, die sich durch in den Dichtblechen 4 vorgesehene, in radialer Richtung erstreckende Langlöcher erstrecken und an der Radscheibe 2 festgelegt sind. Die Langlöcher dienen dazu, eine Bewegung der Dichtbleche 4 während des bestimmungsgemäßen Betriebs der Radscheibenanordnung 1 in radialer Richtung zu ermöglichen. Alternativ können natürlich auch andere geeignete Befestigungsmittel eingesetzt werden, um die Dichtbleche 4 in ihrer bestimmungsgemäßen Umfangsposition zu fixieren. Im nunmehr fertig montierten Zustand der Radscheibenanordnung 1 ist das Verschlussstück 9 dank des formschlüssigen Eingriffs zwischen den Nuten 19 der Dichtbleche 4 und dem Steg 18 auch in axialer Richtung fixiert und gesichert.For mounting the in FIG. 1 shown wheel disk assembly 1, all blade devices 3 are fixed in a known manner to the wheel disc 2 in a first step. Subsequently, the individual sealing plates 4 are inserted in sequence axially through the recess 8 in the annular grooves 5 and 6 and then displaced in the circumferential direction and arranged close together. Thanks to the stepped design of the side surfaces 14 of the sealing plates 4, it is possible that after the installation of all sealing plates 4, the region of the recess 8 remains free of sheet metal. In a further step, the closure piece 9 is now inserted axially into the recess 8, wherein the Verschlussstückvorsprünge 16 engage with the pockets 15 of the annular projection 7, whereby a radial securing of the closure piece 9 is achieved. In a subsequent step, the sealing plates 4 are moved in the circumferential direction in its intended position. In this case, the grooves 19 of the sealing plates of two adjacent sealing plates 4 are each partially brought into positive engagement with the protruding from the receiving surface 17 of the closure piece 9 web 18. In a further step, the sealing plates 4 are fixed by suitable means in their intended circumferential position. Thus, a fixation, for example, using bolts not shown in detail, which extend through provided in the sealing plates 4, extending in the radial direction elongated holes and fixed to the wheel disc 2. The slots are used to allow movement of the sealing plates 4 during normal operation of the wheel disc assembly 1 in the radial direction. Alternatively, of course, other suitable fastening means can be used to fix the sealing plates 4 in their intended circumferential position. In now fully assembled state of the wheel disc assembly 1, the closure piece 9 is fixed and secured in the axial direction, thanks to the positive engagement between the grooves 19 of the sealing plates 4 and the web 18.

Ein wesentlicher Vorteil der Radscheibenanordnung 1 besteht darin, dass sich die Dichtbleche 4 einfach und problemlos montieren und demontieren lassen, und zwar auch dann, wenn die Schaufeleinrichtungen 3 bereits bzw. noch an der Radscheibe 2 fixiert sind. Ferner sind die Anlagenflächen 11 der Haltevorsprünge 10, die Tragflächen 13 der Tragvorsprünge 12 und die Höhe der Dichtbleche 4 derart ausgebildet sind, dass sich die Tragflächen 13 der Dichtbleche 4 während des bestimmungsgemäßen Betriebs der Radscheibenanordnung 1 unter Einwirkung einer Fliehkraft gegen die Anlagefläche 11 der Haltevorsprünge 10 abstützen. Damit wird das Eigengewicht der Dichtbleche 4 durch die Radscheibe 2 aufgenommen, was dazu führt, dass die Verbindungsbereiche zwischen der Radscheibe 2 und den Schaufeleinrichtungen 3 weniger stabil sein müssen und damit kostengünstiger hergestellt werden können. Dank der symmetrischen Ausbildung der Haltevorsprünge 10 und der Tragvorsprünge 12 wird ferner eine sehr homogene Krafteinleitung in die Radscheibe 2 erzielt. Darüber hinaus wird das Verschlussstück 9 aufgrund des Formschlusses zwischen dem Steg 18 des Verschlussstückes 9 und den Nuten 19 der Dichtbleche 4 in einfacher Weise ohne zusätzliche Sicherungselemente in seiner bestimmungsgemäßen Position gesichert, wodurch insgesamt ein einfacher Aufbau erzielt wird. Es sollte allerdings klar sein, dass besagter Formschluss auch mittels einer an dem Verschlussstück 9 vorgesehene Vertiefung und radial von den Dichtblechen 4 vorstehender Vorsprünge bzw. Stege erzielt werden kann.A significant advantage of the wheel disc assembly 1 is that the sealing plates 4 can be easily and easily assembled and disassembled, even if the blade devices 3 already or still on the wheel disc 2 are fixed. Further, the contact surfaces 11 of the retaining projections 10, the support surfaces 13 of the support projections 12 and the height of the sealing plates 4 are formed such that the support surfaces 13 of the sealing plates 4 during normal operation of the Radscheibenanordnung 1 under the action of centrifugal force against the contact surface 11 of the retaining projections 10 support. Thus, the weight of the sealing plates 4 is taken up by the wheel disc 2, resulting in that the connection areas between the wheel disc 2 and the blade means 3 must be less stable and thus can be produced more cheaply. Thanks to the symmetrical design of the holding projections 10 and the supporting projections 12, a very homogeneous introduction of force is also achieved in the wheel disc 2. In addition, the closure piece 9 is due to the positive connection between the web 18 of the closure piece 9 and the grooves 19 of the sealing plates 4 secured in a simple manner without additional securing elements in its intended position, whereby a total of a simple structure is achieved. However, it should be clear that said positive connection can also be achieved by means of a depression provided on the closure piece 9 and projections or webs projecting radially from the sealing plates 4.

Ferner sei darauf hingewiesen, dass es grundsätzlich ausreicht, einen einzelnen Haltevorsprung 10 und einen einzelnen Tragvorsprung 12 vorzusehen, wie es in Figur 5 dargestellt ist, in der gleiche oder gleichartige Bauteile mit denselben Bezugsziffern wie in den Figuren 1 bis 4 versehen sind. Im Übrigen entspricht die in Figur 5 gezeigte Anordnung derjenigen Anordnung, die zuvor unter Bezugnahme auf die Figuren 2 bis 4 beschrieben wurde.It should also be noted that it is basically sufficient to provide a single retaining projection 10 and a single support projection 12, as in FIG. 5 is shown in the same or similar components with the same reference numerals as in the FIGS. 1 to 4 are provided. Otherwise, the in FIG. 5 shown arrangement of that arrangement, previously with reference to the FIGS. 2 to 4 has been described.

Figur 6 zeigt eine weitere alternative Ausführungsform der in den Figuren 2 bis 4 dargestellten Anordnung, die sich nur dahingehend unterscheidet, dass zur axialen Sicherung des Verschlussstückes 9 an Dichtblechen 4 radial einwärts vorstehende Stege 20 ausgebildet sind und an dem Verschlussstück 9 eine korrespondierend ausgebildete Nut 21 vorgesehen ist, wodurch ein Formschluss zwischen dem Verschlussstück 9 und den Dichtblechen im bestimmungsgemäß montierten Zustand erzielt wird. Im Übrigen entsprechen die Anordnungen einander, weshalb gleiche oder gleichartige Bauteile mit denselben Bezugsziffern versehen sind. FIG. 6 shows a further alternative embodiment of the in the FIGS. 2 to 4 arrangement shown, which differs only to the effect that for axial securing of the closure piece 9 on sealing plates 4 radially inwardly projecting webs 20 are formed and on the closure piece. 9 a correspondingly formed groove 21 is provided, whereby a positive connection between the closure piece 9 and the sealing plates is achieved in the intended mounted state. Incidentally, the arrangements correspond to each other, which is why identical or similar components are provided with the same reference numerals.

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 further 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 (9)

  1. Wheel disk assembly (1), having a wheel disk (2), a plurality of blade devices (3), which are fastened along the outer circumference of the wheel disk (2), and a plurality of sealing plates (4), which are retained in two annular grooves (5, 6) spaced apart from each other radially, wherein the first annular groove (5) is provided in the wheel disk (2) and is bounded axially outward by an annular projection (7), and wherein the second annular groove (6) is defined by a multiplicity of adjacently arranged annular groove segments, which are each provided in the individual blade devices (3), wherein at least one recess (8) extending axially through the annular projection (7) is provided, the minimum width of which recess in the circumferential direction is greater than the width of the sealing plates (4) at the inside diameter, with the result that a sealing plate (4) can be inserted axially through the recess (8) between the annular grooves (5, 6) and can be moved in the circumferential direction while being guided by the latter, and that at least one closure piece (9) is provided, which is designed for closing the recess (8) and can be detachably fastened to the wheel disk (2), wherein the closure piece (9), when mounted as intended, is captively retained in the axial direction by a form fit provided between the closure piece (9) and at least one sealing plate (4),
    characterized in that
    the first annular groove (5) is of undercut design and, when viewed in cross section, has at least one axially protruding retaining projection (10), which is provided with a contact surface (11), and that the sealing plates (4), when viewed in cross section, each have at least one axially protruding support projection (12) in the region of the inside diameter, said support projection being designed to correspond to the at least one retaining projection (10) and being provided with a support surface (13), wherein the contact surface (11) of the at least one retaining projection (10), the support surface (13) of the at least one support projection (12) and the height of the sealing plates (4) are designed in such a way that the support surfaces (13) of the sealing plates (4) are supported against the contact surface (11) of the at least one retaining projection (10) under the action of a centrifugal force during the operation of the wheel disk assembly (1) as intended.
  2. Wheel disk assembly (1) according to Claim 1, characterized in that
    the form fit is achieved by means of at least one projection protruding radially from the closure piece (9) and at least one depression formed on the sealing plate (4), into which depression the projection engages when mounted as intended.
  3. Wheel disk assembly (1) according to Claim 1, characterized in that
    the form fit is achieved by means of at least one projection protruding radially from the sealing plate (4) and at least one depression formed on the closure piece (9), into which depression the projection engages when mounted as intended.
  4. Wheel disk assembly (1) according to Claim 2 or 3, characterized in that
    the at least one depression is designed as a groove (19; 21) in the form of an annular segment extending in the circumferential direction, and the at least one projection is designed as a web (18; 20) in the form of an annular segment extending in the circumferential direction.
  5. Wheel disk assembly (1) according to one of Claims 1 to 4, characterized in that
    the first annular groove (5), when viewed in cross section, has two retaining projections (10), which are situated axially opposite each other, are directed toward each other and are each provided with a contact surface (11), and that the sealing plates (4), when viewed in cross section, comprise two support projections (12) in the region of the inside diameter, which are designed to correspond to the retaining projections (10), are situated axially opposite each other and are directed away from each other, each of said projections being provided with a support surface (13), wherein the contact surfaces (11) and the support surfaces (13) are designed in such a way that the support surfaces (13) of the sealing plates (4) are supported against the contact surfaces (11) of the retaining projections (10) under the action of a centrifugal force during the operation of the wheel disk assembly (1) as intended.
  6. Wheel disk assembly (1) according to one of Claims 1 to 5, characterized in that
    the contact surface (11) of the at least one retaining projection (10) and the contact surfaces (13) of the sealing plates (4) each extend both transversely to the radial direction and transversely to the axial direction.
  7. Wheel disk assembly (1) according to one of the preceding claims,
    characterized in that
    the lateral surfaces (14) of the sealing plates (4) extend at least in part transversely to the axial direction and are designed in such a way that the sealing plates (4) overlap in the region of the lateral surfaces (14) thereof in respect of the axial direction in the intended state.
  8. Wheel disk assembly (1) according to one of the preceding claims,
    characterized in that
    the lateral surfaces (14) of the sealing plates (4) are of stepped design.
  9. Wheel disk assembly (1) according to Claim 8, characterized in that
    the at least one closure piece (9) has, on opposite sides, closure-piece projections (16) protruding in the circumferential direction, which engage in correspondingly designed pockets (15) of the recess (8) in the intended state.
EP15738025.4A 2014-07-17 2015-07-09 Wheel disc assembly Active EP3129599B1 (en)

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EP14177461.2A EP2975218A1 (en) 2014-07-17 2014-07-17 Wheel disc assembly
PCT/EP2015/065656 WO2016008789A1 (en) 2014-07-17 2015-07-09 Wheel disk assembly

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EP2975219A1 (en) * 2014-07-17 2016-01-20 Siemens Aktiengesellschaft Wheel disc assembly
EP3561234B1 (en) * 2018-04-25 2020-10-07 Siemens Aktiengesellschaft Rotor with sealing assambly
EP3564489A1 (en) * 2018-05-03 2019-11-06 Siemens Aktiengesellschaft Rotor with for centrifugal forces optimized contact surfaces

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US5662458A (en) * 1995-08-24 1997-09-02 Rolls-Royce Plc Bladed rotor with retention plates and locking member

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CN106536864A (en) 2017-03-22
EP3129599A1 (en) 2017-02-15
US20170211397A1 (en) 2017-07-27
US10378367B2 (en) 2019-08-13
EP2975218A1 (en) 2016-01-20
CN106536864B (en) 2018-10-09
JP6367463B2 (en) 2018-08-01
WO2016008789A1 (en) 2016-01-21
JP2017522492A (en) 2017-08-10

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