EP3077627B1 - Wheel disc with at least one sealing sheet metal panel - Google Patents

Wheel disc with at least one sealing sheet metal panel Download PDF

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Publication number
EP3077627B1
EP3077627B1 EP15713737.3A EP15713737A EP3077627B1 EP 3077627 B1 EP3077627 B1 EP 3077627B1 EP 15713737 A EP15713737 A EP 15713737A EP 3077627 B1 EP3077627 B1 EP 3077627B1
Authority
EP
European Patent Office
Prior art keywords
wheel disk
sealing plate
screw
wheel disc
circumferential direction
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
Application number
EP15713737.3A
Other languages
German (de)
French (fr)
Other versions
EP3077627A1 (en
Inventor
Sascha Dungs
Harald Hoell
Kevin KAMPKA
Karsten Kolk
Marc Lange
Peter Schröder
Vyacheslav Veitsman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP15713737.3A priority Critical patent/EP3077627B1/en
Publication of EP3077627A1 publication Critical patent/EP3077627A1/en
Application granted granted Critical
Publication of EP3077627B1 publication Critical patent/EP3077627B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
    • 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
    • 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
    • F01D5/02—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
    • F01D5/326—Locking of axial insertion type blades by other means
    • 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/24—Rotors for 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
    • 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
    • F05D2260/31—Retaining bolts or nuts
    • 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 with at least one sealing plate which is slidably mounted on the wheel disc in the circumferential direction, and at least one securing device which is designed such that it secures the at least one sealing plate in the intended mounted state against displacement in the circumferential direction of the wheel disc ,
  • Such wheel discs 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 disposed in the circumferential direction of a wheel disc.
  • the sealing plates can be used for example with their radially inwardly facing edge in a provided on the wheel disc circumferential groove.
  • Such 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, into which the screw is screwed in the intended mounted state.
  • a problem with such a safety device is that the notch effect associated with the threaded hole provided in the wheel disc can cause problems.
  • screws often can not be solved in case of service, resulting in a costly boring of the compound by itself.
  • the present invention provides a wheel disc according to claim 1. Due to the fact that the screw is screwed according to the invention with the sealing plate and not with the wheel disc, prevents the wheel disc, which forms the much more expensive component compared to the sealing plate, is affected by a thread-induced notch effect. Furthermore, a screw that is bolted to the sealing plate, relatively easy to remove in case of service without damaging the wheel, even if the screw can not be solved.
  • the recess is preferably formed as a transversely extending to the circumferential direction slot in the wheel disc. Accordingly, production-related tolerances, thermal expansion or the like can be easily compensated.
  • the screw is screwed into a sleeve provided with an internal thread, which is held against rotation in a provided on the sealing plate passage opening.
  • a sleeve is advantageous in that it can be exchanged in case of service in a simple manner. Also, a proper fastening of the screw can be ensured via such a sleeve, even if the sealing plate has only a small thickness.
  • the sleeve has at least one radially outwardly projecting projection, which is inserted during the insertion of the sleeve into the passage opening in a corresponding recess extending from the passage opening.
  • a structurally simple anti-rotation is achieved, which also can be easily installed.
  • the recess of the passage opening is advantageously accessible from that side of the sealing plate, which faces in the intended mounted state of the recess provided on the wheel disc.
  • the sleeve is advantageously mounted from the back of the sealing plate, so that the sleeve is automatically secured when screwing the screw on the sealing plate.
  • a captive which secures the screw in the intended mounted state on the sealing plate. In this way it can be prevented that the screw accidentally loosened during normal operation of the wheel disc.
  • the captive on a retaining ring which is provided with radially outwardly projecting securing projections which engage in the intended mounted state in such a manner formed on the screw and the sealing plate receiving recesses that twisting both the screw and the locking ring is prevented.
  • the receiving recesses may, for example, each extend in the axial direction such that the securing projections can be bent after tightening the screw in the receiving recesses.
  • the screw is formed at its free end, with which it engages in the intended mounted state in the recess of the wheel disc, rounded. Accordingly, any damage to the wheel disc can be prevented by the screw.
  • the at least one sealing plate is held in a form-fitting manner on the wheel disc.
  • the at least one sealing plate may have a bead-like edge region, which is received in a correspondingly formed undercut receiving groove of the wheel disc.
  • FIGS. 1 to 9 show a wheel disc 1 according to an embodiment of the present invention or components thereof.
  • the wheel disc 1 comprises a plurality of sealing plates 2, which are fastened to this displaceable in the circumferential direction.
  • the radially inwardly facing edge of the sealing plate 2 is for this purpose provided with a bead 3 which is slidably received in an undercut receiving groove 4 in the circumferential direction, wherein the receiving groove 4 is formed by the wheel disc 1 on the one hand and by a fastened to the wheel disc 1 closure piece 5 on the other , which in this case has an L-shaped cross-section.
  • each sealing plate 2 is provided with at least one securing device 6, the individual components as a screw 7, provided on the wheel disc 1 recess 8, a sleeve 9 and a Circlip 10 has.
  • the screw 7 comprises a screw head 11 and a screw shank 12. Centered on the screw head 11, a hexagon key receptacle 13 is arranged in a known manner. Along the circumference of the screw head 11 are uniform distributed four receiving recesses 14 are formed, which extend in the axial direction through the screw head 11.
  • the screw shaft 12 is provided with external thread 15 and formed rounded at its free end.
  • the recess 8 of the wheel disc 1 serves to receive the screw 7, as will be explained in more detail below, and has corresponding dimensions. It is designed as a transversely extending to the circumferential direction slot.
  • the sleeve 9 is provided with an internal thread 16 which is matched to the external thread 15 of the screw 7.
  • the sleeve 9, which is inserted in the intended state in a through hole 17 of the sealing plate 2, comprises at its rear free end a radially outwardly projecting projection 18 which is inserted during the insertion of the sleeve 9 in the through hole 17 in a corresponding recess 19, which extends from the passage opening 17 and is accessible from that side of the sealing plate 2, which faces the recess 8.
  • the locking ring 10 is provided with four radially outwardly projecting, uniformly distributed along the circumference securing projections 20, whose dimensions are chosen such that they can be accommodated in the receiving recesses 14 of the screw 7 on the one hand and in receiving recesses 21 on the other hand, at the front of the sealing plate 2 are arranged on opposite sides of the passage opening 17.
  • the bead 3 is arranged at the intended position on the wheel disc 1 in a first step such that the passage opening of the sealing plate 2 and the recess 8 of the wheel disc are arranged in alignment with each other, whereupon the closure piece 5 is positioned and is attached to the wheel disc 1.
  • the bead 3 is slidably received in the undercut receiving groove 4 in the circumferential direction.
  • the sleeve 9 is now inserted starting from the back of the sealing plate 2 in the associated passage opening 17 and the projection 18 of the sleeve 9 while inserted into the recess 19 of the sealing plate 2, so that the Sleeve 9 within the through hole 17 can not rotate.
  • the securing ring 10 is pushed onto the screw shank 12 of the screw 7, whereupon it is screwed into the sleeve 9 in such a way that the free end of the screw shank 12 is received in the depression 8 provided on the wheel disc 1.
  • the screw 7 now opposing securing projections 20 of the locking ring 10 are bent forward into the receiving recesses 14 of the screw 7.
  • the other two securing projections 20 of the securing ring 10 are bent backwards into the associated receiving recesses 21 of the sealing plate 2.
  • the screw 7 is held captive on the sealing plate 2 and engages in the recess 8 of the wheel disc 1 a. Accordingly, a movement of the screw 7 and thus of the sealing plate 2 in the circumferential direction is limited or prevented by the corresponding walls of the recess 8.
  • a significant advantage associated with the securing device 6 according to the invention is that the wheel disc 1, which forms a relatively expensive component, is in no way impaired by notch effects. Furthermore, the securing device 6 can be easily solved or replaced during maintenance. Thanks to the fact that the recess 8 is formed as a slot, manufacturing tolerances and thermal movements of the sealing plate 2 can be compensated. Overall, a very simple and inexpensive construction is achieved.

Description

Die vorliegende Erfindung betrifft eine Radscheibe mit wenigstens einem Dichtblech, das an der Radscheibe in deren Umfangsrichtung verschiebbar befestigt ist, und zumindest einer Sicherungseinrichtung, die derart ausgebildet ist, dass sie das wenigstens eine Dichtblech im bestimmungsgemäß montierten Zustand gegen eine Verschiebung in Umfangsrichtung der Radscheibe sichert.The present invention relates to a wheel disc with at least one sealing plate which is slidably mounted on the wheel disc in the circumferential direction, and at least one securing device which is designed such that it secures the at least one sealing plate in the intended mounted state against displacement in the circumferential direction of the wheel disc ,

Derartige Radscheiben sind im Stand der Technik bekannt. Sie bilden Komponenten von Rotoren, wie beispielsweise Gasturbinenläufern oder dergleichen. Normalerweise sind an einer Radscheibe mehrere Dichtbleche in deren Umfangsrichtung verschiebbar angeordnet. So können die Dichtbleche beispielsweise mit ihrer radial einwärts weisenden Kante in eine an der Radscheibe vorgesehene Umfangsnut eingesetzt sein. 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 kann beispielsweise durch eine sich durch eine im Dichtblech vorgesehene Durchgangsöffnung erstreckende Schraube und eine an der Radscheibe vorgesehene Gewindebohrung gebildet werden, in welche die Schraube im bestimmungsgemäß montierten Zustand geschraubt ist. Ein Problem einer derart ausgebildeten Sicherungseinrichtung besteht allerdings darin, dass die mit der in der Radscheibe vorgesehenen Gewindebohrung einhergehende Kerbwirkung Probleme bereiten kann. Darüber hinaus lassen sich Schrauben im Servicefall häufig nicht mehr lösen, was ein aufwendiges Aufbohren der Verbindung nach sich zieht.Such wheel discs 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 disposed in the circumferential direction of a wheel disc. Thus, the sealing plates can be used for example with their radially inwardly facing edge in a provided on the wheel disc circumferential groove. 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 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, into which the screw is screwed in the intended mounted state. However, a problem with such a safety device is that the notch effect associated with the threaded hole provided in the wheel disc can cause problems. In addition, screws often can not be solved in case of service, resulting in a costly boring of the compound by itself.

Weitere Radscheiben mit daran angeordneten Dichtblechen sind in den Druckschriften JP-S-58 35203 A , US-A-5 030 063 , US-A-5 263 823 , US-A-5 277 548 , DE 19 28 184 , EP-A- 1 840 338 , EP-A-2 518 271 offenbart.Further wheel discs with sealing plates arranged thereon are in the documents JP-S-58 35203 A . US-A-5 030 063 . US-A-5 263 823 . U.S. Patent 5,277,548 . DE 19 28 184 . EP-A-1 840 338 . EP-A-2 518 271 disclosed.

Ausgehend von diesem Stand der Technik ist es eine Aufgabe der vorliegenden Erfindung, eine Radscheibe der eingangs genannten Art mit einer alternativen Sicherungseinrichtung zu schaffen, welche die Festigkeit der Radscheibe nur geringfügig beeinträchtigt und im Servicefall problemlos austauschbar ist.Based on this prior art, it is an object of the present invention to provide a wheel disc of the type mentioned with an alternative security device, which only slightly affects the strength of the wheel and is easy to replace in case of service.

Zur Lösung dieser Aufgabe schafft die vorliegende Erfindung eine Radscheibe nach Anspruch 1. Aufgrund der Tatsache, dass die Schraube erfindungsgemäß mit dem Dichtblech und nicht mit der Radscheibe verschraubt ist, wird verhindert, dass die Radscheibe, die gegenüber dem Dichtblech das wesentlich teurere Bauteil bildet, durch eine durch ein Gewinde verursachte Kerbwirkung beeinträchtigt wird. Ferner lässt sich eine Schraube, die mit dem Dichtblech verschraubt ist, im Servicefall verhältnismäßig einfach ohne Beschädigung der Radscheibe entfernen, selbst wenn sich die Schraubverbindung nicht lösen lässt.To solve this problem, the present invention provides a wheel disc according to claim 1. Due to the fact that the screw is screwed according to the invention with the sealing plate and not with the wheel disc, prevents the wheel disc, which forms the much more expensive component compared to the sealing plate, is affected by a thread-induced notch effect. Furthermore, a screw that is bolted to the sealing plate, relatively easy to remove in case of service without damaging the wheel, even if the screw can not be solved.

Die Vertiefung ist bevorzugt als sich quer zur Umfangsrichtung erstreckendes Langloch in der Radscheibe ausgebildet. Entsprechend können fertigungsbedingte Toleranzen, Wärmedehnungen oder dergleichen problemlos ausgeglichen werden. Erfindungsgemäß ist die Schraube in eine mit einem Innengewinde versehene Hülse geschraubt, die verdrehsicher in einer an dem Dichtblech vorgesehenen Durchgangsöffnung gehalten ist. Eine solche Hülse ist dahingehend von Vorteil, dass sie sich im Servicefall in einfacher Weise austauschen lässt. Auch kann über eine solche Hülse eine ordnungsgemäße Befestigung der Schraube gewährleistet werden, selbst wenn das Dichtblech nur eine geringe Stärke aufweist.The recess is preferably formed as a transversely extending to the circumferential direction slot in the wheel disc. Accordingly, production-related tolerances, thermal expansion or the like can be easily compensated. According to the invention, the screw is screwed into a sleeve provided with an internal thread, which is held against rotation in a provided on the sealing plate passage opening. Such a sleeve is advantageous in that it can be exchanged in case of service in a simple manner. Also, a proper fastening of the screw can be ensured via such a sleeve, even if the sealing plate has only a small thickness.

Bevorzugt weist die Hülse wenigstens einen radial auswärts vorstehenden Vorsprung auf, der während des Einschiebens der Hülse in die Durchgangsöffnung in eine korrespondierende Aussparung eingeführt wird, die sich ausgehend von der Durchgangsöffnung erstreckt. Auf diese Weise wird eine baulich einfache Verdrehsicherung erzielt, die sich zudem problemlos montieren lässt.Preferably, the sleeve has at least one radially outwardly projecting projection, which is inserted during the insertion of the sleeve into the passage opening in a corresponding recess extending from the passage opening. In this way, a structurally simple anti-rotation is achieved, which also can be easily installed.

Die Aussparung der Durchgangsöffnung ist vorteilhaft von derjenigen Seite des Dichtbleches zugänglich, die im bestimmungsgemäß montierten Zustand der an der Radscheibe vorgesehenen Vertiefung zugewandt ist. Mit anderen Worten wird die Hülse vorteilhaft von der Rückseite des Dichtbleches montiert, so dass die Hülse beim Einschrauben der Schraube automatisch am Dichtblech gesichert wird.The recess of the passage opening is advantageously accessible from that side of the sealing plate, which faces in the intended mounted state of the recess provided on the wheel disc. In other words, the sleeve is advantageously mounted from the back of the sealing plate, so that the sleeve is automatically secured when screwing the screw on the sealing plate.

Vorteilhaft ist eine Verliersicherung vorgesehen, welche die Schraube im bestimmungsgemäß montierten Zustand an dem Dichtblech sichert. Auf diese Weise kann verhindert werden, dass sich die Schraube während des bestimmungsgemäßen Betriebs der Radscheibe versehentlich löst.Advantageously, a captive is provided, which secures the screw in the intended mounted state on the sealing plate. In this way it can be prevented that the screw accidentally loosened during normal operation of the wheel disc.

Gemäß einer Ausgestaltung der vorliegenden Erfindung weist die Verliersicherung einen Sicherungsring auf, der mit radial auswärts vorstehenden Sicherungsvorsprüngen versehen ist, die im bestimmungsgemäß montierten Zustand derart in korrespondierend an der Schraube und am Dichtblech ausgebildete Aufnahmevertiefungen greifen, dass ein Verdrehen sowohl der Schraube als auch des Sicherungsrings verhindert wird. Die Aufnahmevertiefungen können sich beispielsweise jeweils in axialer Richtung derart erstrecken, dass die Sicherungsvorsprünge nach dem Festziehen der Schraube in die Aufnahmevertiefungen gebogen werden können.According to one embodiment of the present invention, the captive on a retaining ring which is provided with radially outwardly projecting securing projections which engage in the intended mounted state in such a manner formed on the screw and the sealing plate receiving recesses that twisting both the screw and the locking ring is prevented. The receiving recesses may, for example, each extend in the axial direction such that the securing projections can be bent after tightening the screw in the receiving recesses.

Vorteilhaft ist die Schraube an ihrem freien Ende, mit dem sie im bestimmungsgemäß montierten Zustand in die Vertiefung der Radscheibe greift, gerundet ausgebildet. Entsprechend kann jegliche Beschädigung der Radscheibe durch die Schraube verhindert werden.Advantageously, the screw is formed at its free end, with which it engages in the intended mounted state in the recess of the wheel disc, rounded. Accordingly, any damage to the wheel disc can be prevented by the screw.

Gemäß einer Ausgestaltung der vorliegenden Erfindung ist das wenigstens eine Dichtblech formschlüssig an der Radscheibe gehalten. Bevorzugt kann das wenigstens eine Dichtblech einen wulstartig ausgebildeten Kantenbereich aufweisen, der in einer korrespondierend ausgebildeten hinterschnittenen Aufnahmenut der Radscheibe aufgenommen ist.According to one embodiment of the present invention, the at least one sealing plate is held in a form-fitting manner on the wheel disc. Preferably, the at least one sealing plate may have a bead-like edge region, which is received in a correspondingly formed undercut receiving groove of the wheel disc.

Weitere Merkmale und Vorteile der vorliegenden Erfindung werden anhand der nachfolgenden Beschreibung einer Radscheibe gemäß einer Ausführungsform der vorliegenden Erfindung unter Bezugnahme auf die beiliegende Zeichnung deutlich. Darin ist

Figur 1
eine perspektivische Seitenquerschnittansicht eines Bereiches einer Radscheibe gemäß einer Ausführungsform der vorliegenden Erfindung, an der ein Dichtblech gehalten ist;
Figur 2
eine perspektivische Vorderansicht der in Figur 1 dargestellten Radscheibe;
Figur 3
eine perspektivische Rückansicht des in Figur 1 dargestellten Dichtbleches;
Figur 4
eine perspektivische Ansicht einer in den Figuren 1 und 3 dargestellten Hülse;
Figur 5
eine perspektivische Ansicht einer in den Figuren 1 und 3 dargestellten Verliersicherung;
Figur 6
eine perspektivische Ansicht einer in den Figuren 1 und 3 dargestellten Schraube;
Figur 7
eine perspektivische Vorderansicht des in den Figuren 1 und 3 dargestellten Dichtbleches;
Figur 8
eine vergrößerte Ansicht des in Figur 7 mit dem Bezugszeichen VIII bezeichneten Ausschnitts des Dichtbleches; und
Figur 9
eine perspektivische Rückansicht des in Figur 8 dargestellten Dichtblechausschnitts.
Further features and advantages of the present invention will become apparent from the following description of a wheel disc according to an embodiment of the present invention with reference to the accompanying drawings. That's it
FIG. 1
a perspective side cross-sectional view of a portion of a wheel disc according to an embodiment of the present invention, on which a sealing plate is held;
FIG. 2
a front perspective view of the FIG. 1 shown wheel disc;
FIG. 3
a perspective rear view of the in FIG. 1 illustrated sealing plates;
FIG. 4
a perspective view of the in the FIGS. 1 and 3 illustrated sleeve;
FIG. 5
a perspective view of the in the FIGS. 1 and 3 illustrated captive security;
FIG. 6
a perspective view of the in the FIGS. 1 and 3 illustrated screw;
FIG. 7
a front perspective view of the in the FIGS. 1 and 3 illustrated sealing plates;
FIG. 8
an enlarged view of the in FIG. 7 designated by the reference numeral VIII section of the sealing plate; and
FIG. 9
a perspective rear view of the in FIG. 8 illustrated sealing sheet cutout.

Die Figuren 1 bis 9 zeigen eine Radscheibe 1 gemäß einer Ausführungsform der vorliegenden Erfindung bzw. Komponenten derselben. Die Radscheibe 1 umfasst mehrere Dichtbleche 2, die an dieser in Umfangsrichtung verschiebbar befestigt sind. Die radial einwärts weisende Kante des Dichtbleches 2 ist hierzu mit einem Wulst 3 versehen, der in einer hinterschnittenen Aufnahmenut 4 in Umfangsrichtung verschiebbar aufgenommen ist, wobei die Aufnahmenut 4 durch die Radscheibe 1 einerseits und durch ein an der Radscheibe 1 befestigtes Verschlussstück 5 andererseits gebildet wird, das vorliegend einen L-förmigen Querschnitt aufweist. An dieser Stelle sei darauf hingewiesen, dass der Wulst 3 und die Aufnahmenut 4 lediglich ein Beispiel einer formschlüssigen Verbindung darstellen, und dass grundsätzlich auch andere formschlüssige Verbindungen zur Befestigung des Dichtbleches 2 an der Radscheibe 1 verwendet werden können. Um zu verhindern, dass sich die Dichtbleche 2 im bestimmungsgemäß montierten Zustand in Umfangsrichtung verschieben können, ist jedes Dichtblech 2 mit zumindest einer Sicherungseinrichtung 6 versehen, die als Einzelkomponenten eine Schraube 7, eine an der Radscheibe 1 vorgesehene Vertiefung 8, eine Hülse 9 und einen Sicherungsring 10 aufweist.The FIGS. 1 to 9 show a wheel disc 1 according to an embodiment of the present invention or components thereof. The wheel disc 1 comprises a plurality of sealing plates 2, which are fastened to this displaceable in the circumferential direction. The radially inwardly facing edge of the sealing plate 2 is for this purpose provided with a bead 3 which is slidably received in an undercut receiving groove 4 in the circumferential direction, wherein the receiving groove 4 is formed by the wheel disc 1 on the one hand and by a fastened to the wheel disc 1 closure piece 5 on the other , which in this case has an L-shaped cross-section. At this point it should be noted that the bead 3 and the receiving groove 4 represent only one example of a positive connection, and that in principle other positive connections for attaching the sealing plate 2 can be used on the wheel disc 1. In order to prevent that the sealing plates 2 can move in the intended mounted state in the circumferential direction, each sealing plate 2 is provided with at least one securing device 6, the individual components as a screw 7, provided on the wheel disc 1 recess 8, a sleeve 9 and a Circlip 10 has.

Die Schraube 7 umfasst einen Schraubenkopf 11 und einen Schraubenschaft 12. Mittig am Schraubenkopf 11 ist in bekannter Weise eine Innensechskantschlüsselaufnahme 13 angeordnet. Entlang des Umfangs des Schraubenkopfes 11 sind gleichmäßig verteilt vier Aufnahmevertiefungen 14 ausgebildet, die sich in axialer Richtung durch den Schraubenkopf 11 erstrecken. Der Schraubenschaft 12 ist mit Außengewinde 15 versehen und an seinem freien Ende abgerundet ausgebildet.The screw 7 comprises a screw head 11 and a screw shank 12. Centered on the screw head 11, a hexagon key receptacle 13 is arranged in a known manner. Along the circumference of the screw head 11 are uniform distributed four receiving recesses 14 are formed, which extend in the axial direction through the screw head 11. The screw shaft 12 is provided with external thread 15 and formed rounded at its free end.

Die Vertiefung 8 der Radscheibe 1 dient zur Aufnahme der Schraube 7, wie es nachfolgend noch näher erläutert ist, und weist entsprechende Abmessungen auf. Sie ist als sich quer zur Umfangsrichtung erstreckendes Langloch ausgebildet.The recess 8 of the wheel disc 1 serves to receive the screw 7, as will be explained in more detail below, and has corresponding dimensions. It is designed as a transversely extending to the circumferential direction slot.

Die Hülse 9 ist mit einem Innengewinde 16 versehen, das auf das Außengewinde 15 der Schraube 7 abgestimmt ist. Die Hülse 9, die im bestimmungsgemäßen Zustand in eine Durchgangsöffnung 17 des Dichtbleches 2 eingesetzt ist, umfasst an ihrem hinteren freien Ende einen radial auswärts vorstehenden Vorsprung 18, der während des Einschiebens der Hülse 9 in die Durchgangsöffnung 17 in eine korrespondierende Aussparung 19 eingeführt wird, die sich ausgehend von der Durchgangsöffnung 17 erstreckt und von derjenigen Seite des Dichtbleches 2 zugänglich ist, die der Vertiefung 8 zugewandt ist.The sleeve 9 is provided with an internal thread 16 which is matched to the external thread 15 of the screw 7. The sleeve 9, which is inserted in the intended state in a through hole 17 of the sealing plate 2, comprises at its rear free end a radially outwardly projecting projection 18 which is inserted during the insertion of the sleeve 9 in the through hole 17 in a corresponding recess 19, which extends from the passage opening 17 and is accessible from that side of the sealing plate 2, which faces the recess 8.

Der Sicherungsring 10 ist mit vier radial auswärts vorstehenden, gleichmäßig entlang des Umfangs verteilten Sicherungsvorsprüngen 20 versehen, deren Abmessungen derart gewählt sind, dass sie in den Aufnahmevertiefungen 14 der Schraube 7 einerseits und in Aufnahmevertiefungen 21 andererseits aufgenommen werden können, die an der Vorderseite des Dichtbleches 2 an einander gegenüberliegenden Seiten der Durchgangsöffnung 17 angeordnet sind.The locking ring 10 is provided with four radially outwardly projecting, uniformly distributed along the circumference securing projections 20, whose dimensions are chosen such that they can be accommodated in the receiving recesses 14 of the screw 7 on the one hand and in receiving recesses 21 on the other hand, at the front of the sealing plate 2 are arranged on opposite sides of the passage opening 17.

Zur Montage des Dichtbleches 2 an der Radscheibe 1 wird in einem ersten Schritt der Wulst 3 an der bestimmungsgemäßen Position an der Radscheibe 1 derart angeordnet, dass die Durchgangsöffnung des Dichtbleches 2 und die Vertiefung 8 der Radscheibe miteinander fluchtend angeordnet sind, woraufhin das Verschlussstück 5 positioniert und an der Radscheibe 1 befestigt wird. Nunmehr ist der Wulst 3 in der hinterschnittenen Aufnahmenut 4 in Umfangsrichtung verschiebbar aufgenommen. Um eine Verschiebung des Dichtbleches 2 in Umfangsrichtung zu verhindern, wird nunmehr die Hülse 9 ausgehend von der Rückseite des Dichtbleches 2 in die zugeordnete Durchgangsöffnung 17 eingeschoben und der Vorsprung 18 der Hülse 9 dabei in die Aussparung 19 des Dichtbleches 2 eingeführt, so dass sich die Hülse 9 innerhalb der Durchgangsöffnung 17 nicht mehr drehen kann. In einem weiteren Schritt wird der Sicherungsring 10 auf den Schraubenschaft 12 der Schraube 7 aufgeschoben, woraufhin diese derart in die Hülse 9 eingeschraubt wird, dass das freie Ende des Schraubenschaftes 12 in der an der Radscheibe 1 vorgesehenen Vertiefung 8 aufgenommen wird. Nach dem Festziehen der Schraube 7 werden nunmehr einander gegenüberliegende Sicherungsvorsprünge 20 des Sicherungsrings 10 nach vorne in die Aufnahmevertiefungen 14 der Schraube 7 gebogen. Die anderen beiden Sicherungsvorsprünge 20 des Sicherungsrings 10 werden nach hinten in die zugeordneten Aufnahmevertiefungen 21 des Dichtbleches 2 gebogen. Nunmehr ist die Schraube 7 verliersicher an dem Dichtblech 2 gehalten und greift in die Vertiefung 8 der Radscheibe 1 ein. Entsprechend wird eine Bewegung der Schraube 7 und damit des Dichtbleches 2 in Umfangsrichtung durch die entsprechenden Wandungen der Vertiefung 8 begrenzt bzw. verhindert.For mounting the sealing plate 2 on the wheel disc 1, the bead 3 is arranged at the intended position on the wheel disc 1 in a first step such that the passage opening of the sealing plate 2 and the recess 8 of the wheel disc are arranged in alignment with each other, whereupon the closure piece 5 is positioned and is attached to the wheel disc 1. Now, the bead 3 is slidably received in the undercut receiving groove 4 in the circumferential direction. In order to prevent displacement of the sealing plate 2 in the circumferential direction, the sleeve 9 is now inserted starting from the back of the sealing plate 2 in the associated passage opening 17 and the projection 18 of the sleeve 9 while inserted into the recess 19 of the sealing plate 2, so that the Sleeve 9 within the through hole 17 can not rotate. In a further step, the securing ring 10 is pushed onto the screw shank 12 of the screw 7, whereupon it is screwed into the sleeve 9 in such a way that the free end of the screw shank 12 is received in the depression 8 provided on the wheel disc 1. After tightening the screw 7 now opposing securing projections 20 of the locking ring 10 are bent forward into the receiving recesses 14 of the screw 7. The other two securing projections 20 of the securing ring 10 are bent backwards into the associated receiving recesses 21 of the sealing plate 2. Now, the screw 7 is held captive on the sealing plate 2 and engages in the recess 8 of the wheel disc 1 a. Accordingly, a movement of the screw 7 and thus of the sealing plate 2 in the circumferential direction is limited or prevented by the corresponding walls of the recess 8.

Ein wesentlicher Vorteil, der mit der erfindungsgemäßen Sicherungseinrichtung 6 einhergeht, besteht darin, dass die Radscheibe 1, die ein vergleichsweise teures Bauteil bildet, in keiner Weise durch Kerbwirkungen beeinträchtigt wird. Ferner kann die Sicherungseinrichtung 6 im Rahmen von Wartungsarbeiten problemlos gelöst oder ausgetauscht werden. Dank der Tatsache, dass die Vertiefung 8 als Langloch ausgebildet ist, können Fertigungstoleranzen und thermische Bewegungen des Dichtbleches 2 ausgeglichen werden. Insgesamt wird ein sehr einfacher und preiswerter Aufbau erzielt.A significant advantage associated with the securing device 6 according to the invention is that the wheel disc 1, which forms a relatively expensive component, is in no way impaired by notch effects. Furthermore, the securing device 6 can be easily solved or replaced during maintenance. Thanks to the fact that the recess 8 is formed as a slot, manufacturing tolerances and thermal movements of the sealing plate 2 can be compensated. Overall, a very simple and inexpensive construction is achieved.

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 durch die folgenden Ansprüche definierten 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 as defined by the following claims.

Claims (9)

  1. Wheel disk (1) with at least one sealing plate (2) which is fastened to the wheel disk (1) so that it can be displaced in the circumferential direction of the latter, and with at least one securing device (6) which is designed such that it secures the at least one sealing plate (2) in the properly mounted state against displacement in the circumferential direction of the wheel disk (1), wherein the securing device (6) has a screw (7), which is screwed to the sealing plate (2) and extends through the latter, and an indentation (8), provided on the wheel disk (1), which receives the free end of the screw (7) in the properly mounted state and the wall of which limits movement of the screw (7) in the circumferential direction, characterized in that the screw (7) is screwed into a sleeve (9) provided with an internal thread (16) which is held non-rotatably in a through hole (17) provided on the sealing plate (2).
  2. Wheel disk (1) according to Claim 1, characterized in that the indentation (8) is designed as a slot extending transversely to the circumferential direction.
  3. Wheel disk (1) according to Claim 1 or 2, characterized in that the sleeve (9) has at least one radially outward protruding projection (18) which, during the insertion of the sleeve (9) into the through hole (17), is introduced into a corresponding recess (19) which extends from the through hole (17) .
  4. Wheel disk (1) according to Claim 3, characterized in that the recess (19) of the through hole (17) is advantageously accessible from that side of the sealing plate (2) which faces the indentation (8) provided on the wheel disk (1) in the properly mounted state.
  5. Wheel disk (1) according to one of the preceding claims, characterized in that a retaining means is provided which secures the screw (7) on the sealing plate (2) in the properly mounted state.
  6. Wheel disk (1) according to Claim 5, characterized in that the retaining means has a securing ring (10) which is provided with radially outward protruding securing projections (20) which, in the properly mounted state, engage in receiving indentations (14, 21) formed correspondingly on the screw (7) and on the sealing plate (2) in such a way that rotation of both the screw (7) and the securing ring (10) is prevented.
  7. Wheel disk (1) according to one of the preceding claims, characterized in that the screw (7) is designed so that it is rounded at its free end.
  8. Wheel disk (1) according to one of the preceding claims, characterized in that the at least one sealing plate (2) is held positively on the wheel disk (1).
  9. Wheel disk (1) according to Claim 7, characterized in that the at least one sealing plate (2) has an edge region which is designed in the manner of a bead and is received in a correspondingly designed undercut receiving groove (4) of the wheel disk (1).
EP15713737.3A 2014-04-15 2015-03-31 Wheel disc with at least one sealing sheet metal panel Not-in-force EP3077627B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15713737.3A EP3077627B1 (en) 2014-04-15 2015-03-31 Wheel disc with at least one sealing sheet metal panel

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP14164724.8A EP2933436A1 (en) 2014-04-15 2014-04-15 Wheel disc with at least one sealing sheet metal panel
EP15713737.3A EP3077627B1 (en) 2014-04-15 2015-03-31 Wheel disc with at least one sealing sheet metal panel
PCT/EP2015/056985 WO2015158542A1 (en) 2014-04-15 2015-03-31 Wheel disc with at least one sealing metal sheet

Publications (2)

Publication Number Publication Date
EP3077627A1 EP3077627A1 (en) 2016-10-12
EP3077627B1 true EP3077627B1 (en) 2017-11-01

Family

ID=50513703

Family Applications (2)

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EP14164724.8A Withdrawn EP2933436A1 (en) 2014-04-15 2014-04-15 Wheel disc with at least one sealing sheet metal panel
EP15713737.3A Not-in-force EP3077627B1 (en) 2014-04-15 2015-03-31 Wheel disc with at least one sealing sheet metal panel

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14164724.8A Withdrawn EP2933436A1 (en) 2014-04-15 2014-04-15 Wheel disc with at least one sealing sheet metal panel

Country Status (5)

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US (1) US20170191371A1 (en)
EP (2) EP2933436A1 (en)
JP (1) JP2017527745A (en)
CN (1) CN106232942B (en)
WO (1) WO2015158542A1 (en)

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Also Published As

Publication number Publication date
WO2015158542A1 (en) 2015-10-22
CN106232942A (en) 2016-12-14
JP2017527745A (en) 2017-09-21
EP3077627A1 (en) 2016-10-12
CN106232942B (en) 2018-04-10
EP2933436A1 (en) 2015-10-21
US20170191371A1 (en) 2017-07-06

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