EP3561234B1 - Rotor with sealing assambly - Google Patents

Rotor with sealing assambly Download PDF

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Publication number
EP3561234B1
EP3561234B1 EP18169222.9A EP18169222A EP3561234B1 EP 3561234 B1 EP3561234 B1 EP 3561234B1 EP 18169222 A EP18169222 A EP 18169222A EP 3561234 B1 EP3561234 B1 EP 3561234B1
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EP
European Patent Office
Prior art keywords
rotor
closing element
sealing surface
engagement portion
installation
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.)
Active
Application number
EP18169222.9A
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German (de)
French (fr)
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EP3561234A1 (en
Inventor
Kevin KAMPKA
Peter Schröder
Joana VERHEYEN
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 Energy Global GmbH and Co KG
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Siemens AG
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Priority to EP18169222.9A priority Critical patent/EP3561234B1/en
Publication of EP3561234A1 publication Critical patent/EP3561234A1/en
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Publication of EP3561234B1 publication Critical patent/EP3561234B1/en
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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
    • 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

Definitions

  • the invention relates to a rotor of a gas turbine with a sealing arrangement with regard to the sealing of an assembly space between two cover elements arranged in front of a rotor disk.
  • Rotors of gas turbines generally comprise a plurality of rotor disks, with at least some of the rotor disks being intended to accommodate the rotor blades.
  • the corresponding rotor disk has a plurality of blade holding grooves distributed around the circumference.
  • the end face of the blade retaining grooves is to be separated fluidically from the hot gas flowing through the gas turbine if possible, since cooling air is usually guided through the blade retaining grooves.
  • the rotor disks usually have sealing plates distributed in the circumference in front of the end face, which are fastened to the rotor disk and / or the rotor blades.
  • the inner edge section of the sealing plates facing the rotor disk engages in a circumferential annular groove.
  • the side of the inner edge section pointing away from the rotor disk rests against a flank of the annular groove.
  • an embodiment is often used in which the sealing plates are designed to overlap in the circumferential direction and to each other are movable.
  • the necessary free space can be created in order to be able to use the last rotor blade.
  • the sealing plates are pushed onto a block in the circumferential direction, with a larger gap in the width of the blade retaining groove being created between two sealing plates.
  • the sealing plates are again evenly distributed around the circumference.
  • a rotor according to the preamble of claim 1 which has a rotor disk with a plurality of blade retaining grooves, in each of which rotor blades are fastened.
  • Sealing plates are arranged in front of an end face of the rotor disk or the rotor blades. These are mounted in an annular groove in the rotor disk. In this case, the sealing plates can be partially displaced against one another in the circumferential direction for assembly. This creates an assembly space in the annular groove that is not closed by the sealing plates.
  • a closing element which is arranged below the sealing elements on the side facing the rotor axis and which closes the assembly space at least in sections.
  • the WO 2015/193033 A1 discloses, in an initially analogous manner, a rotor according to the preamble of claim 7 with a rotor disk to which a plurality of rotor blades are attached distributed around the circumference.
  • the overlapping sealing plates are again located in front of the rotor disk, the sealing plates being mounted on the outer circumference in an annular groove formed by the rotor blades.
  • the object of the present invention is therefore to improve the sealing by means of the sealing plates on the annular groove or the annular segment groove.
  • the object set for sealing an inner assembly space is achieved by an embodiment according to the invention according to the teaching of claim 1 and for sealing an outer assembly free space according to the teaching of claim 7.
  • the generic rotor is particularly preferably used in a gas turbine. Independently of this, however, the embodiment can also be used in other types of rotary or turbomachines. At least the rotor comprises at least one rotor disk. This rotor disk has a plurality of blade holding grooves which axially penetrate the rotor disk and are distributed around the circumference. Adjacent to the rotor disk, the rotor further comprises a rotor component, it being irrelevant in this regard whether the rotor component is likewise a bladed rotor disk or some other annular component. Furthermore, the generic rotor comprises a plurality of rotor blades, which are each fastened with a blade root in the blade holding grooves. A blade platform, which extends in the circumferential direction and axially, and here as a rule an end face of the rotor disk, adjoins the blade root towers. An airfoil extends radially outward from the airfoil platform.
  • the rotor has a circumferential annular groove which can be arranged both in the rotor disk and in the rotor component. At least the annular groove here is designed to open radially outward and thus has, viewed in the axial direction, on both sides a flank extending in the circumferential direction and essentially radially. One of these two flanks forms a sealing surface.
  • ring segment grooves are present in the blade platforms of the rotor blades in the protrusion protruding beyond the end face of the rotor disk, which extend in the circumferential direction and are designed to be open facing the rotor axis. At least one of the two flanks of the ring segment groove that extend in the circumferential direction and radially forms a sealing surface.
  • the generic rotor has the first version with the ring groove and the second version with the ring segment grooves at the same time.
  • the rotor comprises at least one first cover element and at least one second cover element.
  • the two cover elements can be designed as identical parts or different from one another.
  • At least the first cover element has at least one first engagement section which engages in the annular groove or in the annular segment groove.
  • the second cover element has at least one second engagement section, which likewise engages in the annular groove or in the annular segment groove. Both cover elements here rest against the sealing surface of the annular groove or the annular segment groove in the area of the engagement section.
  • the generic rotor has an assembly space in the area between the two cover elements, which is generally required for assembly of the cover elements and the rotor blades.
  • the assembly space adjoins the sealing surface and extends in the circumferential direction from an edge adjoining the sealing surface in the circumferential direction of the cover element to the opposite edge of the adjacent cover element adjoining the sealing surface.
  • the corresponding edge does not have to be the end of the cover element in the circumferential direction.
  • the cover elements each have an inner engagement section which is mounted in the annular groove and which extends toward the rotor axis. There is an inner assembly space between the inner engagement sections of the cover elements.
  • the cover elements each have an outer engagement section which is mounted in the ring segment groove and extends in a radially outward direction. There is an external assembly space between the outer engagement sections of the cover elements.
  • the tightness in the area of the annular groove or in the area of the annular segment groove is now improved in that a closing element is used.
  • the closing element is attached to the first engagement section and extends in the circumferential direction in sections to the adjacent engagement section. It is essential here that the closing element covers the assembly space between the two cover elements adjacent to the sealing surface, at least when the rotor is rotating. This is the case when, in a radial direction of view of the closing element or the assembly gap, the groove base of the annular groove or the annular segment groove located behind it is covered.
  • the closing element is fastened according to the invention to the first inner engagement section and in this case rests against the second inner engagement section when the rotor rotates. Accordingly, the inner assembly space is essentially closed.
  • the closing element is advantageously arranged essentially on the side facing the rotor axis below the engagement sections, so that the centrifugal force in the closing element presses it against the engagement sections.
  • the closing element is positioned with sufficient security in terms of sealing the assembly clearance and with regard to the necessary stability of the closing element only partially overlaps the second engagement section.
  • the closing element is adjustable on the first outer engagement section attached, wherein the rotation of the rotor leads to an adjustment of the closing element with a contact in the circumferential direction on the second engagement portion and / or with a contact in the radial direction on the groove base of the ring segment groove.
  • the closing element is advantageously arranged on the edge in the circumferential direction and at the same time on the radially outer edge.
  • a cover element has a spaced apart from the sealing surface, i. on the rear flap element arranged pointing to an end face of the rotor disk and the adjacent cover element, in contrast, has a front flap element.
  • the front tab element covers the rear tab element in sections, the front tab element still resting against the sealing surface.
  • the rear flap element is arranged on the second cover element and the front flap element is arranged on the first cover element.
  • the front strap element is correspondingly arranged on the second cover element.
  • the assembly space is located between the free end of the front tab element viewed in the circumferential direction and opposite in the circumferential direction a shoulder at which the rear tab element begins.
  • the assembly space extends, viewed in the axial direction, from the sealing surface to the rear bracket element.
  • each cover element i.e. the first cover element and the second cover element can be identical parts and consequently each cover element has a front tab element at one end in the circumferential direction and a rear tab element at the other end in the circumferential direction.
  • the closing element in the first embodiment advantageously rests against the tab element at least when the rotor rotates on the side facing the rotor axis, since these limit the assembly space on three sides.
  • a receiving profile extending in the axial direction is arranged on the first engagement section.
  • the receiving profile penetrates the engagement section in the axial direction.
  • the receiving profile is designed to be open to the rotor axis.
  • the receiving profile can be designed in the form of a T-slot or the like.
  • the closing element has a retaining profile which is fastened in the receiving profile.
  • the retaining profile is designed to be complementary to the receiving profile.
  • the length of the closing element in the circumferential direction is limited to 0.5 times the length of the first cover element and to 0.5 times the length of the second cover element. It is particularly advantageous if the length of the closing element corresponds to a maximum of 0.3 times the length of the cover element in the circumferential direction in the area of the annular groove.
  • the length of the closing element in the circumferential direction is considered greater than twice the length of the assembly space in the same direction.
  • the free length is greater than 1.5 times the length of the assembly space. It can thus be ensured that the assembly space is reliably covered and that there is contact with the engagement sections of the two cover elements on the three circumferential sides.
  • the width of the closing element, viewed in the axial direction, in the area of the fastening of the closing element on the first engagement section corresponds to at least 0.95 times the thickness of the first engagement section at the same point.
  • the movement space of the closing element in the axial direction is very limited relative to the engagement section. It is particularly advantageous if the width of the closing element in the area of the fastening corresponds to at least 0.99 times the thickness of the first engagement section. It can thus be assumed that when the first engagement section rests on the sealing surface, the closing element can also largely bear on the sealing surface.
  • the width of the closing element is not chosen to be unnecessarily large, but rather sufficient to cover the assembly space and to ensure that it is safe Abutment of the closing element in particular on the rear flap element. It is therefore advantageous if the width of the closing element apart from its attachment to the first engagement section and in this respect at least in the area of the assembly clearance corresponds to a maximum of 0.95 times the thickness of the annular groove. It is particularly advantageous if the width corresponds to a maximum of 0.8 times the thickness of the annular groove. This is considered to be sufficient to cover the assembly space and to ensure the necessary stability and, in contrast, allows easy assembly and avoids unnecessary weight.
  • the rotor in the area of the cover element 11 is shown in a longitudinal section.
  • the closing element 21, which is essential for the invention, cannot be seen and in this respect this illustration does not differ from the generic in the prior art.
  • the rotor disk 01 can be seen with a blade retaining groove 02 extending axially through the rotor disk 01.
  • a plurality of cover elements 11 are distributed around the circumference in front of an end face of the rotor disk 01 and in front of the blade retaining grooves 02.
  • the arrangement of a rotor component 06 is adjacent to the rotor disk 01 to recognize.
  • the rotor component 06 has a circumferential annular groove 07 which opens axially outward.
  • the annular groove 07 viewed in the axial direction, has a front flank and a rear flank.
  • the cover elements 11 are each received with an inner engaging section 12 in the annular groove 07.
  • the Fig. 2 in a further perspective illustration a view of the gap between 2 cover elements 11a and 11b.
  • the first cover element 11a has on the right edge in the illustration in the circumferential direction a rear tab element 13, which is arranged on the side facing the rotor disk 01.
  • This 13 is overlapped by a front tab element 14, which 14 is arranged on the left edge in the circumferential direction of the adjacent second cover element 11b.
  • An inner assembly space 09 is formed between the edge of the front flap element 14 and the shoulder from which the rear flap element 13 begins.
  • the inner assembly space 09 is required in order to be able to move the cover elements 11 in the circumferential direction so far that there is sufficient space is available for mounting the last rotor blade in the blade retaining groove 02.
  • the area between the cover elements 11 and the rotor disk 01 is supplied with cooling air, which in all Usually flow through the blade retaining grooves 02 into the individual rotor blades.
  • a closing element 21 is now used, which 21 covers the remaining inner assembly space 09 as best as possible.
  • the closing element 21 is fastened to the first cover element 11a at the first inner engagement section 12a and on the side facing the rotor axis rests against the second inner engagement section 12b of the second cover element 12b.
  • the Figures 3 and 4 the arrangement of the closing element 21 on the inner engagement portions 12a and 12b of the cover elements 11a and 11b.
  • the closing element 21 has a complementary retaining profile 22 which is fastened 22 in the receiving profile 16.
  • the actual function is fulfilled by the closing element 21 by its abutment on the side facing the rotor axis on the first inner engagement section and on the second inner engagement section, or in particular on the underside of the rear tab element 13 and the front tab element 14.
  • the length of the closing element 21 in the circumferential direction is selected to be significantly smaller than the length of the individual cover elements 11. This facilitates assembly and reduces the weight of this embodiment, as if a rotating piston ring were used.
  • cover elements 11 with the inner engagement sections 12 and the closing element 21 bear against a flank of the annular groove 07 in a sealing manner.
  • the Fig. 5 a section through the rotor component 06 with the annular groove 03.
  • the flank of the annular groove 07 pointing away from the rotor disk 01 forms a sealing surface 08.
  • the engagement sections 12 rest against this 08.
  • the closing element 21 likewise rests against the sealing surface 08.
  • the cover element 11 is sketched again in a perspective view, which 11 is used in this embodiment as the same part for the first cover element 11a and the second cover element 11b.
  • the arrangement of the rear strap element 13 on one side in the circumferential direction, the side opposite the front strap element 14 and the inner engagement section 12 with the receiving profile 16 can be seen.
  • the rotor in the area of the closing element 25 is now shown in detail.
  • the two adjacent cover elements 11a and 11b can be seen.
  • the blade platform 36 of the rotor blade 35 is located radially outside the cover element 11.
  • In the blade platform 36 there is an annular segment groove 37 on the side facing the rotor axis, the flank of the annular segment groove 37 facing away from the rotor disk forming a sealing surface 38.
  • An outer engagement section 15 of the cover element 11 engages in the ring segment groove.
  • the cover elements 11 are designed to overlap at their joint in the circumferential direction, the first cover element 11a having a rear tab element 13 and the adjacent second cover element 11b having a front tab element 14 protruding beyond the rear tab element 13.
  • the first cover element 11a has, as again in FIG Fig. 9 shown, a guide groove 17 in the first outer engagement section 15a, which 17 is aligned diagonally with an outer assembly space 10.
  • the locking element 25, which can be adjusted along the guide groove 17, is located in the guide groove 17. It is easy to see how the closing element 25 can be pushed completely into the guide groove 17 for the assembly of the sealing plates and blades, so that the cover elements 11 are pushed together completely in the circumferential direction can.
  • an outer assembly space 10 is created between the cover elements 11. This assembly space 10 leads, in particular in the area of the outer engagement sections 15 in the ring segment groove 37, to a gap through which cooling air can escape.
  • the Fig. 10 Again the cover element 11, which 11 can also be used in this embodiment as identical parts for all cover elements 11.
  • the outer engagement section 12 and the rear tab element 13, which is located on the edge in the circumferential direction, can again be seen.
  • the guide groove 17 for receiving the closing element 25 can also be seen.
  • the Fig. 12 shows schematically a second variant of the first embodiment from FIG Figs. 1 to 7 analogous to the illustration in Fig. 4 .
  • the inner engagement section 42 of the cover element 41 with the receiving profile 46 can be seen.
  • the closing element 51 is arranged on the side facing the rotor axis, which engages 51 with a holding profile 52 in the receiving profile 46.
  • the inner engagement section 42 is mounted with the closing element 51 in an annular groove 07 of the rotor disk 01.
  • the closing element 51 is sketched, the length of which extends in the circumferential direction beyond the length of the cover element 41 and thus two assembly spaces can be covered at the same time.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Description

Die Erfindung betrifft einen Rotor einer Gasturbine mit einer Dichtungsanordnung bezüglich der Abdichtung eines Montagefreiraums zwischen zwei vor einer Rotorscheibe angeordneter Abdeckelemente.The invention relates to a rotor of a gas turbine with a sealing arrangement with regard to the sealing of an assembly space between two cover elements arranged in front of a rotor disk.

Rotoren von Gasturbinen umfassend aller Regel mehrere Rotorscheiben, wobei zumindest ein Teil der Rotorscheiben dazu bestimmt ist, die Laufschaufeln aufzunehmen. Hierzu weist die entsprechende Rotorscheibe im Umfang verteilt eine Mehrzahl Schaufelhaltenuten auf. Weiterhin ist es bekannt, dass die Stirnseite der Schaufelhaltenuten nach Möglichkeit strömungstechnisch vom durch die Gasturbine strömenden Heißgas zu trennen ist, da in aller Regel Kühlluft durch die Schaufelhaltenuten geführt wird. Entsprechend weisen die Rotorscheiben üblicherweise vor der Stirnseite im Umfang verteilte Dichtbleche auf, welche an der Rotorscheibe und/oder den Laufschaufeln befestigt sind.Rotors of gas turbines generally comprise a plurality of rotor disks, with at least some of the rotor disks being intended to accommodate the rotor blades. For this purpose, the corresponding rotor disk has a plurality of blade holding grooves distributed around the circumference. Furthermore, it is known that the end face of the blade retaining grooves is to be separated fluidically from the hot gas flowing through the gas turbine if possible, since cooling air is usually guided through the blade retaining grooves. Correspondingly, the rotor disks usually have sealing plates distributed in the circumference in front of the end face, which are fastened to the rotor disk and / or the rotor blades.

Zur Abdichtung des Bereichs vor der Stirnseite der Rotorscheibe gegenüber dem durch die Gasturbine strömenden Heißgas greift jeweils der zur Rotorscheibe weisende innere Randabschnitt der Dichtbleche in eine umlaufende Ringnut ein. Dabei liegt die von der Rotorscheibe wegweisende Seite des inneren Randabschnitts an einer Flanke der Ringnut an.To seal the area in front of the end face of the rotor disk against the hot gas flowing through the gas turbine, the inner edge section of the sealing plates facing the rotor disk engages in a circumferential annular groove. The side of the inner edge section pointing away from the rotor disk rests against a flank of the annular groove.

Auf gegenüberliegender Seite an den Dichtblechen greifen diese jeweils mit einem äußeren Randabschnitt in eine von den Laufschaufeln gebildete Ringsegmentnut ein. Hierdurch wird eine weitgehende Abdichtung von den Dichtblechen zu den Laufschaufeln erreicht.On the opposite side of the sealing plates, these each engage with an outer edge section in an annular segment groove formed by the rotor blades. In this way, an extensive seal between the sealing plates and the rotor blades is achieved.

Zur Montage der Dichtbleche sowie der Laufschaufeln wird häufig eine Ausführung eingesetzt, bei der die Dichtbleche in Umfangsrichtung überlappend ausgeführt sind und jeweils zueinander verschiebbar sind. Hierdurch kann nach Montage aller Dichtbleche der notwendige Freiraum geschaffen werden, um die letzte Laufschaufel einsetzen zu können. Dazu werden die Dichtbleche in Umfangsrichtung auf Block geschoben, wobei zwischen zwei Dichtblechen ein größerer Spalt in der Weite der Schaufelhaltnut entsteht. Nach Montage der letzten Laufschaufel werden die Dichtbleche wieder gleichmäßig im Umfang verteilt.
Wenngleich mit bekannten Ausführungen eine weitgehende Trennung der Räume möglich ist und darüber hinaus auch keine absolute Abdichtung erforderlich ist, verbleibt jedoch dennoch ein geringfügiger Spalt Umfangsrichtung zwischen jeweils zwei Dichtblechen, wenngleich sich diese abschnittsweise überlappen.To assemble the sealing plates and the rotor blades, an embodiment is often used in which the sealing plates are designed to overlap in the circumferential direction and to each other are movable. As a result, after all the sealing plates have been installed, the necessary free space can be created in order to be able to use the last rotor blade. For this purpose, the sealing plates are pushed onto a block in the circumferential direction, with a larger gap in the width of the blade retaining groove being created between two sealing plates. After the last rotor blade has been installed, the sealing plates are again evenly distributed around the circumference.
Although a substantial separation of the spaces is possible with known designs and, in addition, no absolute sealing is required, there is still a slight gap in the circumferential direction between two sealing plates, although these overlap in sections.

Weiterhin ist aus der EP 2975218 A1 ein Rotor gemäß dem Oberbegriff des Anspruchs 1 oekannt, welcher eine Rotorscheibe mit einer Mehrzahl Schaufelhaltenuten aufweist, in denen jeweils Laufschaufeln befestigt sind. Dabei sind vor einer Stirnseite der Rotorscheibe bzw. den Laufschaufeln Dichtbleche angeordnet. Diese sind in einer Ringnut in der Rotorscheibe gelagert. Dabei sind die Dichtbleche abschnittsweise gegeneinander in Umfangsrichtung zur Montage verschiebbar. Hierdurch entsteht ein Montagefreiraum in der Ringnut, welcher nicht durch die Dichtbleche geschlossen ist. Weiterhin ist es bekannt, ein Schließelement einzusetzen, welches auf der zur Rotorachse weisenden Seite unterhalb der Dichtelemente angeordnet ist und zumindest abschnittsweise den Montagefreiraum verschließt.Furthermore, from the EP 2975218 A1 A rotor according to the preamble of claim 1 is known, which has a rotor disk with a plurality of blade retaining grooves, in each of which rotor blades are fastened. Sealing plates are arranged in front of an end face of the rotor disk or the rotor blades. These are mounted in an annular groove in the rotor disk. In this case, the sealing plates can be partially displaced against one another in the circumferential direction for assembly. This creates an assembly space in the annular groove that is not closed by the sealing plates. Furthermore, it is known to use a closing element which is arranged below the sealing elements on the side facing the rotor axis and which closes the assembly space at least in sections.

Die WO 2015/193033 A1 offenbart in zunächst analoger Weise einen Rotor gemäß dem Oberbegriff des Anspruchs 7 mit einer Rotorscheibe, an der im Umfang verteilt eine Mehrzahl Laufschaufeln befestigt sind. Vor der Rotorscheibe befinden sich wiederum die sich überlappenden Dichtbleche, wobei die Dichtbleche am Außenumfang in einer durch die Laufschaufeln gebildeten Ringnut gelagert sind. Gleichfalls gibt es einen Montagefreiraum zwischen den Dichtblechen. In diesem Fall ist vorgesehen, über die Dichtbleche innerhalb der Ringnut ein U-förmiges umlaufendes Profil vorzusehen, welche eine verbesserte Abdichtung des Montagefreiraums in Bereich der Ringnut zu erzielen.The WO 2015/193033 A1 discloses, in an initially analogous manner, a rotor according to the preamble of claim 7 with a rotor disk to which a plurality of rotor blades are attached distributed around the circumference. The overlapping sealing plates are again located in front of the rotor disk, the sealing plates being mounted on the outer circumference in an annular groove formed by the rotor blades. There is also an assembly space between the sealing plates. In this case it is provided over the sealing plates inside the annular groove to provide a U-shaped circumferential profile, which to achieve an improved sealing of the assembly space in the area of the annular groove.

Wenngleich mit dem Schließelement bzw. mit dem U-Profil der Freiraum zwischen den Dichtblechen verkleinert werden kann, so verbleibt jedoch unvermindert eine Lücke, durch welche Kühlluft ungewollt entweichen kann.Although the free space between the sealing plates can be reduced with the closing element or with the U-profile, a gap remains undiminished through which cooling air can inadvertently escape.

Aufgabe der vorliegenden Erfindung ist es daher, die Abdichtung mittels der Dichtbleche an der Ringnut bzw. der Ringsegmentnut zu verbessern.The object of the present invention is therefore to improve the sealing by means of the sealing plates on the annular groove or the annular segment groove.

Die gestellte Aufgabe zur Abdichtung eines inneren Montagefreiraums wird durch eine erfindungsgemäße Ausführungsform nach der Lehre des Anspruchs 1 und zur Abdichtung eines äußeren Montagefreiraums nach der Lehre des Anspruchs 7 gelöst.The object set for sealing an inner assembly space is achieved by an embodiment according to the invention according to the teaching of claim 1 and for sealing an outer assembly free space according to the teaching of claim 7.

Vorteilhafte Ausführungsformen sind Gegenstand der Unteransprüche.Advantageous embodiments are the subject of the subclaims.

Der gattungsgemäße Rotor wird besonders bevorzugt bei einer Gasturbine eingesetzt. Hiervon unabhängig kann die Ausführungsform jedoch ebenso bei anderen Arten von Rotations- bzw. Strömungsmaschinen Verwendung finden. Zumindest umfasst der Rotor zumindest eine Rotorscheibe. Diese Rotorscheibe weist hierbei im Umfang verteilt eine Mehrzahl die Rotorscheibe axialdurchdringende Schaufelhaltenuten auf. Benachbart zur Rotorscheibe umfasst der Rotor weiterhin ein Rotorbauteil, wobei es diesbezüglich unerheblich ist ob es sich bei dem Rotorbauteil gleichfalls um eine beschaufelte Rotorscheibe oder um ein sonstiges ringförmiges Bauteil handelt. Weiterhin umfasst der gattungsgemäße Rotor eine Mehrzahl Laufschaufeln, welche jeweils mit einem Schaufelfuß in den Schaufelhaltenuten befestigt sind. An dem Schaufelfuß schließt sich eine Schaufelplattform an, welche sich in Umfangsrichtung und axial erstreckt und hierbei in der Regel eine Stirnseite der Rotorscheibe überragt. Von der Schaufelplattform ausgehend erstreckt sich radial auswärtsweisend ein Schaufelblatt.The generic rotor is particularly preferably used in a gas turbine. Independently of this, however, the embodiment can also be used in other types of rotary or turbomachines. At least the rotor comprises at least one rotor disk. This rotor disk has a plurality of blade holding grooves which axially penetrate the rotor disk and are distributed around the circumference. Adjacent to the rotor disk, the rotor further comprises a rotor component, it being irrelevant in this regard whether the rotor component is likewise a bladed rotor disk or some other annular component. Furthermore, the generic rotor comprises a plurality of rotor blades, which are each fastened with a blade root in the blade holding grooves. A blade platform, which extends in the circumferential direction and axially, and here as a rule an end face of the rotor disk, adjoins the blade root towers. An airfoil extends radially outward from the airfoil platform.

Der Rotor weist in einer ersten gattungsgemäßen Ausführung eine umlaufende Ringnut auf, welche sowohl in der Rotorscheibe als auch im Rotorbauteil angeordnet sein kann. Zumindest ist die Ringnut hierbei radial auswärts öffnend ausgeführt und weist somit in axialer Richtung betrachtet beidseitig eine sich in Umfangsrichtung und im Wesentlichen radial erstreckende Flanke auf. Eine dieser beiden Flanken bildet hierbei eine Dichtfläche.In a first generic embodiment, the rotor has a circumferential annular groove which can be arranged both in the rotor disk and in the rotor component. At least the annular groove here is designed to open radially outward and thus has, viewed in the axial direction, on both sides a flank extending in the circumferential direction and essentially radially. One of these two flanks forms a sealing surface.

In einer zweiten gattungsgemäßen Ausführung sind in den Schaufelplattformen der Laufschaufeln jeweils in dem die Stirnseite der Rotorscheibe überragenden Überstand Ringsegmentnuten vorhanden, welche sich in Umfangsrichtung erstrecken und zur Rotorachse weisend offen ausgeführt sind. Dabei bildet zumindest eine der beiden sich in Umfangsrichtung und radial erstreckenden Flanken der Ringsegmentnut eine Dichtfläche.In a second generic embodiment, ring segment grooves are present in the blade platforms of the rotor blades in the protrusion protruding beyond the end face of the rotor disk, which extend in the circumferential direction and are designed to be open facing the rotor axis. At least one of the two flanks of the ring segment groove that extend in the circumferential direction and radially forms a sealing surface.

In der Regel weist der gattungsgemäße Rotor die erste Ausführung mit der Ringnut und die zweite Ausführung mit den Ringsegmentnuten zugleich auf.As a rule, the generic rotor has the first version with the ring groove and the second version with the ring segment grooves at the same time.

Weiterhin umfasst der Rotor zumindest ein erstes Abdeckelement und zumindest ein zweites Abdeckelement. Die beiden Abdeckelemente können hierbei als Gleichteile oder verschieden zueinander ausgeführt sein. Zumindest weist das erste Abdeckelement zumindest einen ersten Eingriffsabschnitt auf, welcher in die Ringnut oder in die Ringsegmentnut eingreift. Analog weist das zweite Abdeckelement zumindest einen zweiten Eingriffsabschnitt auf, welcher ebenfalls in die Ringnut oder in die Ringsegmentnut eingreift. Beide Abdeckelemente liegen hierbei im Bereich des Eingriffsabschnitts an der Dichtfläche der Ringnut oder der Ringsegmentnut an.Furthermore, the rotor comprises at least one first cover element and at least one second cover element. The two cover elements can be designed as identical parts or different from one another. At least the first cover element has at least one first engagement section which engages in the annular groove or in the annular segment groove. Analogously, the second cover element has at least one second engagement section, which likewise engages in the annular groove or in the annular segment groove. Both cover elements here rest against the sealing surface of the annular groove or the annular segment groove in the area of the engagement section.

Weiterhin weist der gattungsgemäße Rotor im Bereich zwischen den beiden Abdeckelement einen Montagefreiraum auf, welcher in der Regel zur Montage der Abdeckelemente und der Laufschaufeln erforderlich ist. Dabei grenzt der Montagefreiraum an die Dichtfläche an und erstreckt sich in Umfangsrichtung von einem an die Dichtfläche angrenzenden Rand in Umfangsrichtung des Abdeckelements zum gegenüberliegenden an die Dichtfläche angrenzenden Rand des benachbarten Abdeckelements. Beim entsprechenden Rand muss es sich hierbei nicht in Umfangsrichtung um das Ende des Abdeckelements handeln.Furthermore, the generic rotor has an assembly space in the area between the two cover elements, which is generally required for assembly of the cover elements and the rotor blades. The assembly space adjoins the sealing surface and extends in the circumferential direction from an edge adjoining the sealing surface in the circumferential direction of the cover element to the opposite edge of the adjacent cover element adjoining the sealing surface. The corresponding edge does not have to be the end of the cover element in the circumferential direction.

In der ersten gattungsgemäßen Ausführung weisen die Abdeckelemente jeweils einen in der Ringnut gelagerten inneren Eingriffsabschnitt auf, welcher sich zur Rotorachse weisend erstreckt. Zwischen den inneren Eingriffsabschnitten der Abdeckelemente befindet sich ein innerer Montagefreiraum.In the first generic embodiment, the cover elements each have an inner engagement section which is mounted in the annular groove and which extends toward the rotor axis. There is an inner assembly space between the inner engagement sections of the cover elements.

In der zweiten gattungsgemäßen Ausführung weisen die Abdeckelemente jeweils einen in der Ringsegmentnut gelagerten äußeren Eingriffsabschnitt auf, welcher sich radial auswärts weisend erstreckt. Zwischen den äußeren Eingriffsabschnitten der Abdeckelemente befindet sich ein äußerer Montagefreiraum.In the second generic embodiment, the cover elements each have an outer engagement section which is mounted in the ring segment groove and extends in a radially outward direction. There is an external assembly space between the outer engagement sections of the cover elements.

Erfindungsgemäß wird nunmehr die Dichtigkeit im Bereich der Ringnut bzw. im Bereich der Ringsegmentnut dadurch verbessert, indem ein Schließelement eingesetzt wird. Hierbei wird das Schließelement am ersten Eingriffsabschnitt befestigt und erstreckt sich in Umfangsrichtung abschnittsweise bis zum benachbarten Eingriffsabschnitt. Wesentlich ist hierbei, dass das Schließelement den Montagefreiraum zwischen den beiden Abdeckelementen angrenzend an die Dichtfläche zumindest bei Rotation des Rotors überdeckt. Dies ist gegeben, wenn bei einer radialen Blickrichtung auf das Schließelement bzw. den Montagespalt der dahinter liegende Nutgrund der Ringnut bzw. der Ringsegmentnut verdeckt ist.According to the invention, the tightness in the area of the annular groove or in the area of the annular segment groove is now improved in that a closing element is used. Here, the closing element is attached to the first engagement section and extends in the circumferential direction in sections to the adjacent engagement section. It is essential here that the closing element covers the assembly space between the two cover elements adjacent to the sealing surface, at least when the rotor is rotating. This is the case when, in a radial direction of view of the closing element or the assembly gap, the groove base of the annular groove or the annular segment groove located behind it is covered.

Durch diese vorteilhafte einfache Ausführungsform mit der Ergänzung des Rotors um ein Schließelement im Bereich des Montagefreiraums wird ohne Erschwerung der Montage und ohne nennenswerte Kosten eine verbesserte Abdichtung erzielt. Insbesondere bedarf es zur Realisierung der erfindungsgemäßen Ausführung nur einer geringfügigen Änderung des ersten Eingriffsabschnitts zur Befestigung des Schließelement sowie der Bereitstellung des sehr einfach gehaltenen Schließelements selber.This advantageous simple embodiment with the addition of a closing element to the rotor in the area of the assembly space an improved seal is achieved without complicating assembly and without significant costs. In particular, only a slight change in the first engagement section for fastening the closing element and the provision of the very simply kept closing element itself are required to implement the embodiment according to the invention.

Bei der ersten Ausführungsform ist das Schließelement erfindungsgemäß am ersten inneren Eingriffsabschnitt befestigt und liegt hierbei bei Rotation des Rotors am zweiten inneren Eingriffsabschnitt an. Entsprechend wird der innere Montagefreiraum im Wesentlichen verschlossen. In vorteilhafter Weise wird hierzu das Schließelement im Wesentlichen auf der zur Rotorachse weisenden Seite unterhalb der Eingriffsabschnitte angeordnet, so dass die Fliehkraft im Schließelement dieses an die Eingriffsabschnitte anpresst.In the first embodiment, the closing element is fastened according to the invention to the first inner engagement section and in this case rests against the second inner engagement section when the rotor rotates. Accordingly, the inner assembly space is essentially closed. For this purpose, the closing element is advantageously arranged essentially on the side facing the rotor axis below the engagement sections, so that the centrifugal force in the closing element presses it against the engagement sections.

Wenngleich es möglich ist, das Schließelement in der erste Ausführung sich über den zweiten Eingriffsabschnitt hinaus bis zu einem daran nachfolgenden Abdeckelement erstreckend auszuführen, so ist demgegenüber hinsichtlich der Kosten und der einfachen Montage von Vorteil, wenn sich das Schließelement unter Berücksichtigung einer hinreichenden Sicherheit hinsichtlich Abdichtung des Montage Freiraums sowie hinsichtlich der notwendigen Stabilität des Schließelement lediglich abschnittsweise den zweiten Eingriffsabschnitt überlappt.Although it is possible in the first embodiment to design the closing element to extend beyond the second engagement section to a subsequent cover element, it is advantageous in terms of costs and simple assembly if the closing element is positioned with sufficient security in terms of sealing the assembly clearance and with regard to the necessary stability of the closing element only partially overlaps the second engagement section.

In einer vorteilhaften Variante zur vorherigen Lösung mit einem kurzen Schließelement ist es ebenso möglich ein Schließelement einzusetzen, welches sich über mehr als ein Abdeckelement erstreckt und hierbei zumindest zweimal einen Montagefreiräume zwischen zwei Abdeckelementen verschließt. In diesem Fall sind weniger Schließelemente als Abdeckelemente erforderlich.In an advantageous variant of the previous solution with a short closing element, it is also possible to use a closing element which extends over more than one cover element and in this case closes assembly spaces between two cover elements at least twice. In this case, fewer closing elements than cover elements are required.

Bei der zweiten Ausführungsform ist das Schließelement erfindungsgemäß am ersten äußeren Eingriffsabschnitt verstellbar befestigt, wobei die Rotation des Rotors zu einer Verstellung des Schließelements mit einer Anlage in Umfangsrichtung am zweiten Eingriffsabschnitt und/oder mit einer Anlage in radialer Richtung am Nutgrund der Ringsegmentnut führt. Hierzu wird das Schließelement in vorteilhafter Weise am Rand in Umfangsrichtung sowie zugleich am radial äußeren Rand angeordnet.In the second embodiment, according to the invention, the closing element is adjustable on the first outer engagement section attached, wherein the rotation of the rotor leads to an adjustment of the closing element with a contact in the circumferential direction on the second engagement portion and / or with a contact in the radial direction on the groove base of the ring segment groove. For this purpose, the closing element is advantageously arranged on the edge in the circumferential direction and at the same time on the radially outer edge.

Die bekannte Ausführungsform mit überlappenden Dichtblechen kann in besonders vorteilhafter Weise ebenso bei der erfindungsgemäßen Ausführungsform zum Einsatz kommen. Entsprechend weist ein Abdeckelement ein von der Dichtfläche beabstandetes, d.h. auf der zu einer Stirnseite der Rotorscheibe weisend angeordnetes, hinteres Laschenelement auf und das benachbarte Abdeckelement weist demgegenüber ein vorderes Laschenelement auf. Dabei überdeckt in axialer Richtung betrachtet das vordere Laschenelement abschnittsweise das hintere Laschenelement, wobei weiterhin das vordere Laschenelement an der Dichtfläche anliegt. Dabei kann vorgesehen sein, dass das hintere Laschenelement am zweiten Abdeckelement und das vordere Laschenelement am ersten Abdeckelement angeordnet ist. Besonders bevorzugt wird jedoch die Ausführung, mit einer Anordnung des hinteren Laschenelements am ersten Abdeckelement, an dem im Bereich des Eingriffsabschnitts das Schließelement befestigt ist. Entsprechend ist das vordere Laschenelement am zweiten Abdeckelement angeordnet.The known embodiment with overlapping sealing plates can also be used in a particularly advantageous manner in the embodiment according to the invention. Correspondingly, a cover element has a spaced apart from the sealing surface, i. on the rear flap element arranged pointing to an end face of the rotor disk and the adjacent cover element, in contrast, has a front flap element. In this case, viewed in the axial direction, the front tab element covers the rear tab element in sections, the front tab element still resting against the sealing surface. It can be provided that the rear flap element is arranged on the second cover element and the front flap element is arranged on the first cover element. However, the embodiment with an arrangement of the rear flap element on the first cover element, to which the closing element is fastened in the area of the engagement section, is particularly preferred. The front strap element is correspondingly arranged on the second cover element.

Bei dieser Ausführung mit den sich überlappenden Laschenelementen befindet sich der Montagefreiraum zwischen dem in Umfangsrichtung betrachtet freiem Ende des vorderen Laschenelements und in Umfangsrichtung gegenüberliegend einem Absatz, an dem das hintere Laschenelement beginnt.In this embodiment with the overlapping tab elements, the assembly space is located between the free end of the front tab element viewed in the circumferential direction and opposite in the circumferential direction a shoulder at which the rear tab element begins.

Weiterhin erstreckt sich der Montagefreiraum in axialer Richtung betrachtet von der Dichtfläche bis zum hinteren Laschenelement.Furthermore, the assembly space extends, viewed in the axial direction, from the sealing surface to the rear bracket element.

Zur Montage des Rotors ist hierbei in der Regel möglich, die Abdeckelement in Umfangsrichtung derart zu verschieben, dass sich der Montagefreiraum im Wesentlichen zu Null verkleinert und sich insofern das vordere Laschenelement und das hintere Laschenelement vollständig überlappen. Hierdurch wird es möglich, dass im Umfang verteilt zwischen zwei Abdeckelementen eine größere Lücke, beispielsweise zur Montage einer Laufschaufel, entsteht.To assemble the rotor, it is generally possible to move the cover element in the circumferential direction in such a way that the assembly space is reduced essentially to zero and the front bracket element and the rear bracket element therefore completely overlap. This makes it possible for a larger gap to be created between two cover elements distributed in the circumference, for example for the assembly of a rotor blade.

Hierbei ist nochmals darauf hinzuweisen, dass es sich bei den Abdeckelementen, d.h. dem ersten Abdeckelement und dem zweiten Abdeckelement, um Gleichteile handeln kann und folglich jedes Abdeckelement an einem Ende in Umfangsrichtung ein vorderes Laschenelement und am anderen Ende in Umfangsrichtung ein hinteres Laschenelement aufweist.It should be pointed out again that the cover elements, i.e. the first cover element and the second cover element can be identical parts and consequently each cover element has a front tab element at one end in the circumferential direction and a rear tab element at the other end in the circumferential direction.

Bei Abdeckelementen mit der entsprechenden Überlappung mittels der Laschenelemente liegt in vorteilhafter Weise in der ersten Ausführungsform das Schließelement zumindest bei Rotation des Rotors auf der zur Rotorachse weisenden Seite an den Laschenelement an, da diese auf drei Seiten den Montagefreiraum begrenzen.In the case of cover elements with the corresponding overlap by means of the tab elements, the closing element in the first embodiment advantageously rests against the tab element at least when the rotor rotates on the side facing the rotor axis, since these limit the assembly space on three sides.

Zur Befestigung des Schließelements in der ersten Ausführungsform am ersten inneren Eingriffsabschnitt kommen verschiedene Möglichkeiten in Betracht, wobei erfindungsgemäß am ersten Eingriffsabschnitt ein sich in axialer Richtung erstreckendes Aufnahmeprofil angeordnet wird. Zur einfachen Fertigung durchdringt hierbei das Aufnahmeprofil den Eingriffsabschnitt in axialer Richtung. Zur einfachen Anbringung des Schließelements wird das Aufnahmeprofil zur Rotorachse offen ausgeführt. Beispielsweise kann das Aufnahmeprofil in Form einer T-Nut oder dergleichen ausgeführt sein.Various possibilities come into consideration for fastening the closing element in the first embodiment on the first inner engagement section, wherein according to the invention a receiving profile extending in the axial direction is arranged on the first engagement section. For simple production, the receiving profile penetrates the engagement section in the axial direction. For easy attachment of the closing element, the receiving profile is designed to be open to the rotor axis. For example, the receiving profile can be designed in the form of a T-slot or the like.

Hierzu weist das Schließelement ein Halteprofil auf, welches im Aufnahmeprofil befestigt ist. Naheliegend ist es hierbei vorteilhaft, wenn das Halteprofil komplementär zum Aufnahmeprofil ausgeführt wird.For this purpose, the closing element has a retaining profile which is fastened in the receiving profile. Obviously, it is advantageous here if the retaining profile is designed to be complementary to the receiving profile.

Um die Verstellung des Schließelements bei Rotation des Rotors in der zweiten Ausführungsform mit einer Anlage des Schließelements am zweiten äußeren Eingriffsabschnitt und/oder dem Nutgrund der Ringsegmentnut vorteilhaft bewirken zu können, ist gemäß der Erfindung im ersten äußeren Eingriffsabschnitt eine sich diagonal in Umfangsrichtung und zugleich in radialer Richtung ersteckende Führungsnut vorhanden In dieser ist das Schließelement verschiebbar aufgenommen, sodass sich das Schließelement bei Rotation des Rotors auswärts und in Umfangsrichtung verstellen kann.In order to be able to advantageously effect the adjustment of the closing element when the rotor rotates in the second embodiment with a contact of the closing element on the second outer engagement section and / or the groove base of the ring segment groove, according to the invention in the first outer engagement section a diagonal in the circumferential direction and simultaneously in guide groove extending in the radial direction is present.

Eine vorteilhafte Montage und zugleich eine vorteilhafte Abdeckung des inneren Montagefreiraums bei der ersten Ausführungsform werden durch die Wahl vorteilhafter Größenverhältnisse begünstigt.An advantageous assembly and at the same time an advantageous covering of the inner assembly space in the first embodiment are promoted by the choice of advantageous size ratios.

Zur Vermeidung unnötiger Kosten und eines unnötigen Gewichts ist es vorteilhaft, wenn die Länge des Schließelements in Umfangsrichtung auf das 0,5-fache der Länge des ersten Abdeckelements und auf das 0,5-fache der Länge des zweiten Abdeckelements beschränkt wird. Besonders vorteilhaft ist es, wenn die Länge des Schließelements maximal der 0,3-fachen Länge des Abdeckelements in Umfangsrichtung im Bereich der Ringnut entspricht.To avoid unnecessary costs and unnecessary weight, it is advantageous if the length of the closing element in the circumferential direction is limited to 0.5 times the length of the first cover element and to 0.5 times the length of the second cover element. It is particularly advantageous if the length of the closing element corresponds to a maximum of 0.3 times the length of the cover element in the circumferential direction in the area of the annular groove.

Zur zuverlässigen Abdeckung des Montagfreiraums ist es demgegenüber vorteilhaft, wenn die Länge des Schließelements in Umfangsrichtung größer als die doppelte Länge des Montagefreiraums in gleicher Richtung betrachtet ist. Bei Berücksichtigung des Halteprofils und somit der freien Länge des Schließelements vom Halteprofil bis zum freien Ende des Schließelements ist es analog vorteilhaft, wenn die freie Länge größer als die 1,5-fache Länge des Montagefreiraums ist. Somit kann gewährleistet werden, dass der Montagefreiraum zuverlässig abgedeckt wird und an den drei umlaufenden Seiten eine Anlage an den Eingriffsabschnitten der beiden Abdeckelemente gegeben ist.In order to reliably cover the assembly space, it is advantageous if the length of the closing element in the circumferential direction is considered greater than twice the length of the assembly space in the same direction. When taking into account the retaining profile and thus the free length of the closing element from the retaining profile to the free end of the closing element, it is also advantageous if the free length is greater than 1.5 times the length of the assembly space. It can thus be ensured that the assembly space is reliably covered and that there is contact with the engagement sections of the two cover elements on the three circumferential sides.

Weiterhin ist es zur Gewährleistung einer bestmöglichen Abdichtung zwischen dem Schließelement und der Dichtfläche vorteilhaft, wenn die Breite des Schließelements in axialer Richtung betrachtet im Bereich der Befestigung des Schließelements am ersten Eingriffsabschnitt zumindest der 0,95-fachen Stärke des ersten Eingriffsabschnitts an gleicher Stelle entspricht. Somit ist der Bewegungsraum des Schließelements in axialer Richtung relativ zum Eingriffsabschnitt sehr begrenzt. Besonders vorteilhaft ist es, wenn die Breite des Schließelements im Bereich der Befestigung zumindest der 0,99-fachen Stärke des ersten Eingriffsabschnitts entspricht. Somit kann davon ausgegangen werden, dass bei Anlage des ersten Eingriffsabschnitts an der Dichtfläche auch eine weitgehende Anlage des Schließelements an der Dichtfläche möglich ist.Furthermore, to ensure the best possible seal between the closing element and the sealing surface, the width of the closing element, viewed in the axial direction, in the area of the fastening of the closing element on the first engagement section corresponds to at least 0.95 times the thickness of the first engagement section at the same point. Thus, the movement space of the closing element in the axial direction is very limited relative to the engagement section. It is particularly advantageous if the width of the closing element in the area of the fastening corresponds to at least 0.99 times the thickness of the first engagement section. It can thus be assumed that when the first engagement section rests on the sealing surface, the closing element can also largely bear on the sealing surface.

Zur Vermeidung eines unnötigen Gewichts als auch zu Gewährleistung der leichten Montierbarkeit des Abdeckelements mit dem daran montierten Schließelement ist es weiterhin von Vorteil, wenn die Breite des Schließelements in axialer Richtung betrachtet nicht unnötig groß gewählt wird, sondern vielmehr hinreichend zur Abdeckung des Montagefreiraums und zur sicheren Anlage des Schließelements insbesondere am hinteren Laschenelement. Daher ist es vorteilhaft, wenn die Breite des Schließelements abseits deren Befestigung am ersten Eingriffsabschnitt und insofern zumindest im Bereich des Montagefreiraums maximal der 0,95-fachen Stärke der Ringnut entspricht. Besonders vorteilhaft ist es, wenn die Breite maximal der 0,8-fachen Stärke der Ringnut entspricht. Dieses wird als hinreichend zur Abdeckung des Montagefreiraums und zu Gewährleistung der notwendigen Stabilität angesehen und gewährt demgegenüber eine leichte Montierbarkeit und vermeidet ein unnötiges Gewicht.To avoid unnecessary weight and to ensure that the cover element can be easily assembled with the closing element mounted on it, it is also advantageous if the width of the closing element, viewed in the axial direction, is not chosen to be unnecessarily large, but rather sufficient to cover the assembly space and to ensure that it is safe Abutment of the closing element in particular on the rear flap element. It is therefore advantageous if the width of the closing element apart from its attachment to the first engagement section and in this respect at least in the area of the assembly clearance corresponds to a maximum of 0.95 times the thickness of the annular groove. It is particularly advantageous if the width corresponds to a maximum of 0.8 times the thickness of the annular groove. This is considered to be sufficient to cover the assembly space and to ensure the necessary stability and, in contrast, allows easy assembly and avoids unnecessary weight.

In den nachfolgenden Figuren 1 bis 7 wird eine beispielhafte Ausführungsform für einen erfindungsgemäßen Rotor in der ersten Ausführungsform skizziert. Es zeigen:

Fig. 1
einen Schnitt durch den Rotor in perspektivischer Ansicht im Bereich der Abdeckelemente;
Fig. 2
eine Ansicht auf den Montagefreiraum;
Fig. 3
eine Ansicht auf die Abdeckelemente mit dem Schließelement ;
Fig. 4
eine Detailansicht zur Fig. 3;
Fig. 5
eine Detailansicht im Bereich des Schließelements im Längsschnitt;
Fig. 6
das Abdeckelement zur beispielhaften Ausführung;
Fig. 7
das Schließelement zur ersten Ausführungsform.
In the following Figures 1 to 7 an exemplary embodiment for a rotor according to the invention is outlined in the first embodiment. Show it:
Fig. 1
a section through the rotor in a perspective view in the area of the cover elements;
Fig. 2
a view of the assembly space;
Fig. 3
a view of the cover elements with the closing element;
Fig. 4
a detailed view of the Fig. 3 ;
Fig. 5
a detailed view in the area of the closing element in longitudinal section;
Fig. 6
the cover element for the exemplary embodiment;
Fig. 7
the closing element for the first embodiment.

In den nachfolgenden Figuren 8 bis 10 wird eine beispielhafte Ausführungsform für einen erfindungsgemäßen Rotor in der zweiten Ausführungsform skizziert. Es zeigen:

Fig. 8
eine perspektive Detailansicht im Bereich des Schließelements mit Abdeckelementen und Laufschaufel;
Fig. 9
die Ansicht aus Fig. 1 ohne die Laufschaufel;
Fig. 10
das Abdeckelement zur zweiten Ausführungsform und
Fig. 11
das Schließelement zur zweiten Ausführungsform.
In the following Figures 8 to 10 an exemplary embodiment for a rotor according to the invention in the second embodiment is outlined. Show it:
Fig. 8
a perspective detailed view in the area of the closing element with cover elements and moving blade;
Fig. 9
the view Fig. 1 without the blade;
Fig. 10
the cover element for the second embodiment and
Fig. 11
the closing element for the second embodiment.

Eine Alternative zur ersten beispielhaften Ausführungsform wird in den folgenden Figuren skizziert. Es zeigen:

Fig. 12
eine perspektive Detailansicht im Bereich des Schließelements mit Abdeckelement in weiterer Variante;
Fig. 13
das Schließelement zur Ausführung aus Fig. 12.
An alternative to the first exemplary embodiment is outlined in the following figures. Show it:
Fig. 12
a perspective detailed view in the area of the closing element with cover element in a further variant;
Fig. 13
the closing element for execution Fig. 12 .

In der Fig. 1 wird in einem Längsschnitt der Rotor im Bereich des Abdeckelements 11 gezeigt. In dieser Darstellung ist das für die Erfindung wesentlicher Schließelement 21 nicht zu erkennen und insofern unterscheidet sich dieser Darstellung nicht vom gattungsgemäße in Stand der Technik. Zu erkennen ist die Rotorscheibe 01 mit einer sich axial durch die Rotorscheibe 01 erstreckende Schaufelhaltenut 02. Vor einer Stirnseite der Rotorscheibe 01 und vor den Schaufelhaltenuten 02 befinden sich im Umfang verteilt eine Mehrzahl Abdeckelemente 11. Weiterhin ist die Anordnung eines Rotorbauteils 06 benachbart zur Rotorscheibe 01 zu erkennen. In diesem Fall weist das Rotorbauteil 06 eine umlaufende Ringnut 07 auf, welche sich axial auswärts öffnend. Folglich weist die Ringnut 07 in axialer Richtung betrachtet eine vordere Flanke und eine hintere Flanke auf. In der Ringnut 07 sind die Abdeckelemente 11 jeweils mit einem inneren Eingriffsabschnitt 12 aufgenommen.In the Fig. 1 the rotor in the area of the cover element 11 is shown in a longitudinal section. In this illustration, the closing element 21, which is essential for the invention, cannot be seen and in this respect this illustration does not differ from the generic in the prior art. The rotor disk 01 can be seen with a blade retaining groove 02 extending axially through the rotor disk 01. A plurality of cover elements 11 are distributed around the circumference in front of an end face of the rotor disk 01 and in front of the blade retaining grooves 02. Furthermore, the arrangement of a rotor component 06 is adjacent to the rotor disk 01 to recognize. In this case, the rotor component 06 has a circumferential annular groove 07 which opens axially outward. As a result, the annular groove 07, viewed in the axial direction, has a front flank and a rear flank. The cover elements 11 are each received with an inner engaging section 12 in the annular groove 07.

Hierzu zeigt die Fig. 2 in einer weiteren perspektivischen Darstellung eine Ansicht auf den Spalt zwischen 2 Abdeckelementen 11a und 11b. Hierbei weist das erste Abdeckelement 11a am in der Darstellung in Umfangsrichtung rechten Rand ein hinteres Laschenelement 13 auf, welches 13 auf der zur Rotorscheibe 01 weisenden Seite angeordnet ist. Dieses 13 wird überlappt von einem vorderen Laschenelement 14, welches 14 am in Umfangsrichtung linken Rand des benachbarten zweiten Abdeckelements 11b angeordnet ist. Hierbei bildet sich zwischen dem Rand des vorderen Laschenelements 14 und dem Absatz, ab dem das hintere Laschenelement 13 beginnt, ein innerer Montagefreiraum 09. Der innere Montagefreiraum 09 ist erforderlich, um die Abdeckelemente 11 in Umfangsrichtung so weit verschieben zu können, dass ein hinreichender Freiraum zur Montage der letzten Laufschaufel in die Schaufelhaltenut 02 vorhanden ist.The Fig. 2 in a further perspective illustration a view of the gap between 2 cover elements 11a and 11b. In this case, the first cover element 11a has on the right edge in the illustration in the circumferential direction a rear tab element 13, which is arranged on the side facing the rotor disk 01. This 13 is overlapped by a front tab element 14, which 14 is arranged on the left edge in the circumferential direction of the adjacent second cover element 11b. An inner assembly space 09 is formed between the edge of the front flap element 14 and the shoulder from which the rear flap element 13 begins. The inner assembly space 09 is required in order to be able to move the cover elements 11 in the circumferential direction so far that there is sufficient space is available for mounting the last rotor blade in the blade retaining groove 02.

Üblicherweise wird dem Bereich zwischen den Abdeckelementen 11 und der Rotorscheibe 01 Kühlluft zugeführt, welche in aller Regel durch die Schaufelhaltenuten 02 in die einzelnen Laufschaufeln strömen. Zur Trennung der Kühlluft von der durch die Gasturbine strömenden Heißgas, das heißt insbesondere zur Vermeidung einer unnötigen Leckage an Kühlluft, wird nunmehr ein Schließelement 21 eingesetzt, welches 21 den verbleibenden inneren Montagefreiraum 09 bestmöglich abdeckt. Hierzu wird das Schließelement 21 am ersten Abdeckelement 11a an dem ersten inneren Eingriffsabschnitt 12a befestigt und liegt auf der zur Rotorachse weisenden Seite am zweiten inneren Eingriffsabschnitt 12b des zweiten Abdeckelements 12b an.Usually, the area between the cover elements 11 and the rotor disk 01 is supplied with cooling air, which in all Usually flow through the blade retaining grooves 02 into the individual rotor blades. To separate the cooling air from the hot gas flowing through the gas turbine, that is to say in particular to avoid unnecessary leakage of cooling air, a closing element 21 is now used, which 21 covers the remaining inner assembly space 09 as best as possible. For this purpose, the closing element 21 is fastened to the first cover element 11a at the first inner engagement section 12a and on the side facing the rotor axis rests against the second inner engagement section 12b of the second cover element 12b.

Hierzu zeigen die Figuren 3 und 4 die Anordnung des Schließelements 21 an den inneren Eingriffsabschnitten 12a und 12b der Abdeckelemente 11a und 11b. Zu erkennen ist die Anordnung eines Aufnahmeprofils 16 am ersten inneren Eingriffsabschnitt 12a, welches 16 sich axial durch den ersten inneren Eingriffsabschnitt 12a erstreckt und hierbei zur Rotorachse weisenden Seite offen ausgeführt ist. Entsprechend weist das Schließelement 21 ein komplementäres Halteprofil 22 auf, welches 22 in dem Aufnahmeprofil 16 befestigt ist. Hierbei ist keine exakte Anpassung notwendig, da lediglich ein hinreichender Halt für den Montagevorgang notwendig ist. Die eigentliche Funktion erfüllt das Schließelement 21 durch dessen Anlage auf der zur Rotorachse weisenden Seite am ersten inneren Eingriffsabschnitt und am zweiten inneren Eingriffsabschnitt, bzw. insbesondere an der Unterseite des hinteren Laschenelements 13 und des vorderen Laschenelements 14.To this end, the Figures 3 and 4 the arrangement of the closing element 21 on the inner engagement portions 12a and 12b of the cover elements 11a and 11b. What can be seen is the arrangement of a receiving profile 16 on the first inner engagement section 12a, which 16 extends axially through the first inner engagement section 12a and is designed to be open to the rotor axis. Accordingly, the closing element 21 has a complementary retaining profile 22 which is fastened 22 in the receiving profile 16. In this case, no exact adjustment is necessary, since only a sufficient hold is necessary for the assembly process. The actual function is fulfilled by the closing element 21 by its abutment on the side facing the rotor axis on the first inner engagement section and on the second inner engagement section, or in particular on the underside of the rear tab element 13 and the front tab element 14.

Weiterhin ist zu erkennen, dass die Länge des Schließelements 21 in Umfangsrichtung deutlich kleiner als die Länge der einzelnen Abdeckelemente 11 gewählt ist. Dieses erleichtert die Montage und reduziert das Gewicht dieser Ausführungsform, als wenn denn ein umlaufender Kolbenring eingesetzt werden würde.It can also be seen that the length of the closing element 21 in the circumferential direction is selected to be significantly smaller than the length of the individual cover elements 11. This facilitates assembly and reduces the weight of this embodiment, as if a rotating piston ring were used.

Weiterhin ist zu berücksichtigen, dass möglichst die Abdeckelemente 11 mit den inneren Eingriffabschnitten 12 und das Schließelement 21 dichtend an einer Flanke der Ringnut 07 anliegen. Hierzu zeigt die Fig. 5 einen Schnitt durch das Rotorbauteil 06 mit der Ringnut 03. Dabei bildet die von der Rotorscheibe 01 wegweisende Flanke der Ringnut 07 eine Dichtfläche 08. An dieser 08 liegen die Eingriffsabschnitte 12 an. Gleichfalls liegt das Schließelement 21 ebenso an der Dichtfläche 08 an.It should also be taken into account that the cover elements 11 with the inner engagement sections 12 and the closing element 21 bear against a flank of the annular groove 07 in a sealing manner. The Fig. 5 a section through the rotor component 06 with the annular groove 03. The flank of the annular groove 07 pointing away from the rotor disk 01 forms a sealing surface 08. The engagement sections 12 rest against this 08. The closing element 21 likewise rests against the sealing surface 08.

Bei Betrachtung der Figuren 2, 3 und 5 erschließt sich dem Fachmann naheliegend der innere Montagefreiraum 09, welcher 09 in der Ringnut 07 durch das Schließelement 21 im Wesentlichen verschlossen wird.When looking at the Figures 2 , 3 and 5 The inner assembly space 09, which 09 is essentially closed in the annular groove 07 by the closing element 21, is obvious to the person skilled in the art.

In der nachfolgenden Fig. 6 wird nochmals in perspektivischer Ansicht das Abdeckelement 11 skizziert, welches 11 in diesem Ausführungsbeispiel als Gleichteil für das erste Abdeckelement 11a und das zweite Abdeckelement 11b eingesetzt wird. Zu erkennen ist die Anordnung des hinteren Laschenelements 13 auf einer Seite in Umfangsrichtung, des vorderen Laschenelements 14 gegenüberliegende Seite sowie den inneren Eingriffsabschnitt 12 mit dem Aufnahmeprofil 16.In the following Fig. 6 the cover element 11 is sketched again in a perspective view, which 11 is used in this embodiment as the same part for the first cover element 11a and the second cover element 11b. The arrangement of the rear strap element 13 on one side in the circumferential direction, the side opposite the front strap element 14 and the inner engagement section 12 with the receiving profile 16 can be seen.

In der Fig. 7 wird das Schließelement 21 mit dem Halteprofil 22 skizziert.In the Fig. 7 the closing element 21 with the retaining profile 22 is sketched.

In der Fig. 8 wird nunmehr im Detail der Rotor im Bereich des Schließelements 25 dargestellt. Zu erkennen sind die beiden benachbarten Abdeckelemente 11a und 11b. Radial außerhalb der Abdeckelement 11 befindet sich die Schaufelplattform 36 der Laufschaufel 35. In der Schaufelplattform 36 befindet sich auf der zur Rotorachse weisenden Seite eine Ringsegmentnut 37, wobei die von der Rotorscheibe wegweisende Flanke der Ringsegmentnut 37 eine Dichtfläche 38 bildet. In die Ringsegmentnut greift ein äußerer Eingriffsabschnitt 15 der Abdeckelement 11 ein. Die Abdeckelement 11 sind an ihrem Stoß in Umfangsrichtung überlappend ausgeführt, wobei das erste Abdeckelement 11a ein hinteres Laschenelement 13 und das benachbarte zweite Abdeckelement 11b ein das hintere Laschenelement 13 überragendes vorderes Laschenelement 14 aufweist.In the Fig. 8 the rotor in the area of the closing element 25 is now shown in detail. The two adjacent cover elements 11a and 11b can be seen. The blade platform 36 of the rotor blade 35 is located radially outside the cover element 11. In the blade platform 36 there is an annular segment groove 37 on the side facing the rotor axis, the flank of the annular segment groove 37 facing away from the rotor disk forming a sealing surface 38. An outer engagement section 15 of the cover element 11 engages in the ring segment groove. The cover elements 11 are designed to overlap at their joint in the circumferential direction, the first cover element 11a having a rear tab element 13 and the adjacent second cover element 11b having a front tab element 14 protruding beyond the rear tab element 13.

Das erste Abdeckelement 11a weist, wie nochmals in Fig. 9 dargestellt, im ersten äußeren Eingriffsabschnitt 15a eine Führungsnut 17 auf, welche 17 hierbei diagonal auf einen äußeren Montagefreiraum 10 ausgerichtet ist. In der Führungsnut 17 befindet sich das längs der Führungsnut 17 verstellbare Schließelement 25. Es ist unschwer zu erkennen, wie das Schließelement 25 zur Montage der Dichtbleche und Laufschaufeln vollständig in die Führungsnut 17 eingeschoben werden kann, so dass die Abdeckelemente 11 in Umfangsrichtung vollständig zusammengeschoben werden können. In der Verwendungsposition der Abdeckelement 11 entsteht ein äußerer Montagefreiraum 10 zwischen den Abdeckelementen 11. Dieser Montagefreiraum 10 führt insbesondere im Bereich der äußeren Eingriffsabschnitte 15 in der Ringsegmentnut 37 zu einem Spalt, durch welchen Kühlluft entweichen kann.The first cover element 11a has, as again in FIG Fig. 9 shown, a guide groove 17 in the first outer engagement section 15a, which 17 is aligned diagonally with an outer assembly space 10. The locking element 25, which can be adjusted along the guide groove 17, is located in the guide groove 17. It is easy to see how the closing element 25 can be pushed completely into the guide groove 17 for the assembly of the sealing plates and blades, so that the cover elements 11 are pushed together completely in the circumferential direction can. When the cover element 11 is in use, an outer assembly space 10 is created between the cover elements 11. This assembly space 10 leads, in particular in the area of the outer engagement sections 15 in the ring segment groove 37, to a gap through which cooling air can escape.

Bei Rotation des Rotors führen Fliehkräfte zur Verstellung des Schließelements 25, so dass dieses 25 am benachbarten zweiten äußeren Eingriffsabschnitt 15b zur Anlage kommt und den Montagefreiraum 10 innerhalb der Ringsegmentnut 37 bei einer Betrachtung in radialer Richtung im Wesentlichen verschließt. Hierdurch kann der Kühlluftverlust aufgrund der notwendigen Montagefreiräume 10 reduziert werden.When the rotor rotates, centrifugal forces lead to the adjustment of the closing element 25, so that this 25 comes into contact with the adjacent second outer engagement section 15b and essentially closes the assembly space 10 within the ring segment groove 37 when viewed in the radial direction. In this way, the loss of cooling air due to the necessary assembly clearances 10 can be reduced.

Hierzu zeigt die Fig. 10 nochmals das Abdeckelement 11, welches 11 gleichfalls bei dieser Ausführung als Gleichteile für alle Abdeckelemente 11 eingesetzt werden kann. Zu erkennen ist wiederum der äußere Eingriffsabschnitt 12 sowie das in Umfangsrichtung am Rande liegende hintere Laschenelement 13. Weiterhin ist die Führungsnut 17 zur Aufnahme des Schließelements 25 zu erkennen.The Fig. 10 Again the cover element 11, which 11 can also be used in this embodiment as identical parts for all cover elements 11. The outer engagement section 12 and the rear tab element 13, which is located on the edge in the circumferential direction, can again be seen. The guide groove 17 for receiving the closing element 25 can also be seen.

In der Fig. 11 wird nunmehr das Schließelement 25 zur Verwendung in der zweiten beispielhaften Ausführungsform dargestellt.In the Fig. 11 the closure member 25 is now illustrated for use in the second exemplary embodiment.

Die Fig. 12 zeigt schematisch eine zweite Variante zum ersten Ausführungsbeispiel aus den Fig. 1 bis 7 analog der Darstellung in Fig. 4. Zu erkennen ist der innere Eingriffsabschnitt 42 des Abdeckelements 41 mit dem Aufnahmeprofil 46. Auf der zur Rotorachse weisenden Seite ist das Schließelement 51 angeordnet, welches 51 mit einem Halteprofil 52 in das Aufnahmeprofil 46 eingreift. Der innere Eingriffsabschnitt 42 ist mit dem Schließelement 51 in einer Ringnut 07 der Rotorscheibe 01 gelagert.The Fig. 12 shows schematically a second variant of the first embodiment from FIG Figs. 1 to 7 analogous to the illustration in Fig. 4 . The inner engagement section 42 of the cover element 41 with the receiving profile 46 can be seen. The closing element 51 is arranged on the side facing the rotor axis, which engages 51 with a holding profile 52 in the receiving profile 46. The inner engagement section 42 is mounted with the closing element 51 in an annular groove 07 of the rotor disk 01.

In der Fig. 13 wird hierzu das Schließelement 51 skizziert, dessen Länge in Umfangsrichtung über die Länge des Abdeckelements 41 hinaus reicht und somit zwei Montagefreiräume zugleich abgedeckt werden können.In the Fig. 13 For this purpose, the closing element 51 is sketched, the length of which extends in the circumferential direction beyond the length of the cover element 41 and thus two assembly spaces can be covered at the same time.

Claims (10)

  1. Rotor, in particular of a gas turbine,
    having a rotor disc (01) which (01) has a plurality of blade-holding grooves (02) which are arranged in a circumferentially distributed manner and pass axially through the rotor disc (01), wherein arranged in the rotor disc (01) or in a rotor component (06) adjacent to the rotor disc (01) is an encircling, radially outwardly opening annular groove (07) whose (07) circumferentially and radially extending flank forms a sealing surface (08), and having at least one first covering element (11a, 41) which (11a, 41), with a first inner engagement portion (12a, 42), engages into the annular groove (07) and bears against the sealing surface (08), and having at least one second covering element (11b) which (11b), adjacent to the first covering element (11a), with a second inner engagement portion (12b), engages in the annular groove (07) and bears against the sealing surface (08), wherein, between the two engagement portions (12a, 12b, 42), provision is made of an inner free space for installation (09) that adjoins the sealing surface (08),
    wherein provision is made of a closing element (21, 51) which (21, 51) is fastened to the first inner engagement portion (12a, 42) and which, at least during rotation of the rotor, bears against the second inner engagement portion (12b) and which closes off the inner free space for installation (09),
    wherein the closing element (21, 41) is fastened in a receiving profile (16, 46), which is open towards the rotor axis, by way of a holding profile (22, 52), characterized in that the receiving profile (16, 46) passes through the first engagement portion in the axial direction.
  2. Rotor according to Claim 1,
    characterized
    in that the length of the closing element (21) in the circumferential direction is less than 0.5 times, in particular less than 0.3 times, the length of the first covering element (11a) and is less than 0.5 times, in particular less than 0.3 times, the length of the second covering element (11b).
  3. Rotor according to Claim 1 or 2,
    characterized
    in that the length of the closing element (21, 51) in the circumferential direction is greater than 2 times the length of the free space for installation (08); and/or in that the length of the closing element (21, 51) from the holding profile to the free end in the circumferential direction is greater than 1.5 times the length of the free space for installation (08).
  4. Rotor according to one of Claims 1 to 3,
    characterized
    in that the width of the closing element (21, 51) in the axial direction in the region of its fastening to the first engagement portion (12a, 42) corresponds to at least 0.95 times, in particular at least 0.99 times, the thickness of the first engagement portion (12a, 42).
  5. Rotor according to one of Claims 1 to 4,
    characterized
    in that the width of the closing element (21, 51) in the axial direction in the region of the free space for installation (08) corresponds to at least 0.6 times, in particular at least 0.7 times, the width of the free space for installation (08).
  6. Rotor according to one of Claims 1 to 5,
    characterized
    in that the width of the closing element (21) in the axial direction in the region of the free space for installation (08) corresponds to at most 0.95 times, in particular at most 0.8 times, the thickness of the annular groove (07).
  7. Rotor, in particular of a gas turbine,
    having a rotor disc (01) which (01) has a plurality of blade-holding grooves (02) which are arranged in a circumferentially distributed manner and pass axially through the rotor disc (01), and having a plurality of rotor blades (35) which (35) are in each case fastened in the blade-holding grooves (02) by way of a blade root, which is adjoined by a blade platform (36) projecting beyond the rotor disc, and which each have a radially outwardly extending blade aerofoil, wherein arranged in the blade platforms (36) is in each case one circumferentially extending annular segment groove (37) which opens towards the rotor axis and whose (37) circumferentially and radially extending flank forms a sealing surface (38), and having at least one first covering element (11a) which (11a), with a first outer engagement portion (15a), engages into the annular groove (37) and bears against the sealing surface (38), and having at least one second covering element (11b) which (11b), adjacent to the first covering element (11a), with a second outer engagement portion (15b), engages into the annular groove (37) and bears against the sealing surface (38), wherein, between the two engagement portions (15a, 15b), provision is made of an outer free space for installation (10) that adjoins the sealing surface (38), wherein provision is made of a closing element (25) which (25) is fastened to the first outer engagement portion (15a) and which, at least during rotation of the rotor, bears against the second engagement portion (15b) and/or against the groove base of the annular segment groove (37) and which closes off the outer free space for installation (10),
    characterized in that,
    in the first outer engagement portion (15a), provision is made of a guide groove (17) which extends, in a diagonal manner, in the circumferential direction and at the same time in the radial direction, and in which (17) the closing element (25) is arranged in a displaceable manner.
  8. Rotor according to one of Claims 1 to 7,
    characterized
    in that the first covering element (11a) has a rear tab element (13), which is spaced apart from the sealing surface (08, 38), and the second covering element (11b) has a front tab element (14), which bears against the sealing surface (08, 38) and sectionally covers the rear tab element (13); or
    in that the second covering element (41) has a rear tab element, which is spaced apart from the sealing surface, and the first covering element (41) has a front tab element, which bears against the sealing surface and sectionally covers the rear tab element;
    wherein the free space for installation (09, 10) extends from the rear tab element (13) to the sealing surface (08, 38).
  9. Rotor according to Claim 8,
    characterized
    in that the closing element (21, 25) is fastened to the first engagement portion (12a, 15a) so as to adjoin the rear tab element (13).
  10. Rotor according to Claim 8 or 9,
    characterized
    in that the closing element (21, 25, 51) bears against the tab elements (13, 14).
EP18169222.9A 2018-04-25 2018-04-25 Rotor with sealing assambly Active EP3561234B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18169222.9A EP3561234B1 (en) 2018-04-25 2018-04-25 Rotor with sealing assambly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18169222.9A EP3561234B1 (en) 2018-04-25 2018-04-25 Rotor with sealing assambly

Publications (2)

Publication Number Publication Date
EP3561234A1 EP3561234A1 (en) 2019-10-30
EP3561234B1 true EP3561234B1 (en) 2020-10-07

Family

ID=62063397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18169222.9A Active EP3561234B1 (en) 2018-04-25 2018-04-25 Rotor with sealing assambly

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Country Link
EP (1) EP3561234B1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2957725A1 (en) * 2014-06-16 2015-12-23 Siemens Aktiengesellschaft Rotor with sealing sheets
EP2975218A1 (en) * 2014-07-17 2016-01-20 Siemens Aktiengesellschaft Wheel disc assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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