EP2447474B1 - Blade arrangement, especially stator blade arrangement - Google Patents

Blade arrangement, especially stator blade arrangement Download PDF

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Publication number
EP2447474B1
EP2447474B1 EP11185808.0A EP11185808A EP2447474B1 EP 2447474 B1 EP2447474 B1 EP 2447474B1 EP 11185808 A EP11185808 A EP 11185808A EP 2447474 B1 EP2447474 B1 EP 2447474B1
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EP
European Patent Office
Prior art keywords
channel
blade arrangement
screws
blade
receiving
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EP11185808.0A
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German (de)
French (fr)
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EP2447474A1 (en
Inventor
Ulrich Wellenkamp
Sejko Kolev
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Ansaldo Energia IP UK Ltd
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Ansaldo Energia IP UK Ltd
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Publication of EP2447474A1 publication Critical patent/EP2447474A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
    • F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
    • F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/32—Locking, e.g. by final locking blades or keys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F01D11/008—Sealing the gap between rotor blades or blades and rotor by spacer elements between the blades, e.g. independent interblade platforms
    • 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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/30—Retaining components in desired mutual position
    • F05B2260/301—Retaining bolts or nuts

Definitions

  • the invention relates to a blade assembly, in particular a vane assembly, on a wall of a Fluidströmungsweges a turbomachine, in particular gas turbine, wherein for supporting the blades in a receiving channel formed in the wall with undercut flanks appropriately adapted paddle-side feet and the foot pieces separating insects thoroughly received and are fixed positively.
  • the EP 1 803 900 A1 shows a closing assembly with which the remaining gap between a first and a last inserted in a circumferential groove of a turbomachine blade of a blade ring is to be closed.
  • This is essentially a two-piece intermediate piece arranged between the feet of the first and the last blade, which can be braced by screw elements on the undercut flanks of the circumferential groove.
  • the EP 1 548 232 A1 shows the arrangement of vanes of a turbomachine, wherein the vanes have Leitschaufelfroboe, which are positively received in an undercut edges having circumferential groove of a vane carrier. Between adjacent vanes feet patches are arranged in the circumferential groove, which determine the distance of the guide blade feet in the circumferential direction. In order to fix the filler free of play groove-shaped recesses are provided with annular pressing segments arranged therein, which push away the filler from the bottom of the receiving circumferential groove so that the patches bear frictionally with corresponding profiles on the undercut flanks of the circumferential groove. The press segments can make the assembly or disassembly of the filler considerably more difficult.
  • the GB 2156908 A refers to a rotor assembly of a turbomachine. It is envisaged to use the blades of the rotor with appropriately shaped blade feet in a rotor-side receiving channel, the blade feet are held with appropriate profiles form-fitting in undercuts on the channel flanks. To secure the blade feet in channel longitudinal direction a locking piece is provided, which can be braced between the undercuts of the channel flanks and the channel bottom by means of a clamping screw positively and non-positively.
  • the US 5,522,706 also relates to the securing of blade roots, in the longitudinal direction of a rotor-side channel receiving the blade feet.
  • a blade root bolt pieces arranged to assemble the arrangement of the blade feet in the channel and within the channel between edge-side undercuts and the channel bottom by clamping elements not described in detail (in the drawing hint at clamping screws). It is not shown or suggested at any point that the locking pieces to fill the receiving channel for the blade feet between the blades to form a substantially sturdy contour-free surface.
  • the EP 1 865 153 A2 shows the arrangement of blades on a compressor disk. This has a peripheral channel with undercut flanks, which accommodates correspondingly adapted blade feet in a form-fitting manner. To secure the blade feet a latch member is disposed within the receiving channel, which engages undercut flanks of the receiving channel in the inserted state and by means of a clamping screw which engages in a depression on the channel bottom, can be clamped positively and positively within the channel. Again, neither is shown nor indicated that the locking piece between the adjacent blades could form a sturgeon contour-free surface.
  • the GB 2 171 150 A relates to the arrangement of blades of a rotor assembly of a turbomachine, in particular gas turbine.
  • the vanes have scoop-side foot pieces which can be inserted into a receiving channel on the hub of the rotor assembly, wherein the foot pieces and the channel have opposite undercuts, which cooperate with each other and thus provide the ability to hold the foot pieces within the channel by positive locking.
  • the blades When mounting the blades on the rotor hub, the blades are first inserted with their foot pieces in a twisted position relative to the desired position in the channel and then rotated into the desired position. Only by this rotation a positive connection between the undercuts of the foot pieces and the channel is achieved. However, the foot pieces initially have a more or less large game within the channel.
  • the foot pieces consist essentially of a female thread part which engages with side flanges in recesses on the foot pieces of the blades.
  • the internal thread part receives a screw threadable in its internal thread male thread part, one end of which is tensioned by screw adjustment against the bottom of the receiving channel, the flanges of the female thread part seek to dig the feet of adjacent blades from the receiving channel.
  • the foot pieces of the blades are jammed or wedged with their undercuts against the opposite undercuts of the channel. Each intermediate piece is therefore indirectly held by the adjacent jammed in the channel foot pieces of the blades.
  • the above prior art does not show a blade arrangement, in which between the blades or between their feet arranged filler between the blades on the one hand form a substantially Störkonturenbuild surface and on the other hand can be clamped positively and non-positively within an undercut receiving channel.
  • the invention provides that the intermediate filling pieces for the channel bottom have substantially vertical threaded holes with screws screwed therein, which can be tensioned by screw adjustment against the channel bottom.
  • the invention is based on the general idea of arranging screws on the intermediate filling pieces with which the intermediate filling pieces can be fixed non-positively in the receiving channel.
  • the screws are also arranged captive.
  • each intermediate filling piece can be clamped separately in the receiving channel, each intermediate filling piece can be adjusted and fixed independently of other filling pieces. In addition, a disassembly of the intermediate filler is easily possible.
  • the invention is based on an embodiment and the Fig. 1 to 4 be explained in more detail.
  • Fig. 1 and Fig. 2 has a compressor housing segment 1 on its side facing the gas stream to be compressed side facing a receiving channel 2 with circumferential webs 9.
  • undercuts are formed in the example shown by the arranged on the channel flanks web-like projections.
  • guide vanes 3 are used with molded on them, the cross-section of the receiving channel 2 adapted feet inserted. Between the foot pieces of adjacent guide vanes 3, the channel cross-section adapted insects pH are arranged, on the one hand fill the channel 2, so that the housing segment 1 gas flow side receives a substantially Störkonturenbuild surface. On the other hand, by the Between filler 4 a predetermined distance between adjacent vanes 3 ensured.
  • the intermediate filling pieces 4 are penetrated in each case by a threaded hole which is substantially perpendicular to the bottom of the receiving channel 2 and which receives a screw 5.
  • This threaded hole opens on the side of the intermediate filling pieces 4 facing the channel bottom into a recess 6 which is open towards the channel bottom and which is able to receive an end piece 7 arranged on the screw 5.
  • a hexagon socket 8 or the like is provided for applying a screwing, with which the screw 5 can be schraubverstellen in the threaded bore of the intermediate filler 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Technisches GebietTechnical area

Die Erfindung bezieht sich auf eine Schaufelanordnung, insbesondere eine Leitschaufelanordnung, an einer Wand eines Fluidströmungsweges einer Strömungsmaschine, insbesondere Gasturbine, wobei zur Halterung der Schaufeln in einem in der Wand ausgebildeten Aufnahmekanal mit hinterschnittenen Flanken entsprechend angepasste schaufelseitige Fußstücke sowie die Fußstücke separierende Zwischenfüllstücke formschlüssig aufgenommen und kraftschlüssig fixiert sind.The invention relates to a blade assembly, in particular a vane assembly, on a wall of a Fluidströmungsweges a turbomachine, in particular gas turbine, wherein for supporting the blades in a receiving channel formed in the wall with undercut flanks appropriately adapted paddle-side feet and the foot pieces separating Zwischenfüllstücke positively received and are fixed positively.

Stand der TechnikState of the art

Die EP 1 803 900 A1 zeigt eine Schlussbaugruppe, mit der der verbleibende Zwischenraum zwischen einer ersten und einer letzten in einer Umfangsnut einer Strömungsmaschine eingesetzten Schaufel eines Schaufelkranzes geschlossen werden soll. Dabei handelt es sich im Wesentlichen um ein zwischen den Füßen der ersten und der letzten Schaufel angeordnetes zweiteiliges Zwischenstück, welches sich durch Schraubelemente an den hinterschnittenen Flanken der Umfangsnut verspannen lässt.The EP 1 803 900 A1 shows a closing assembly with which the remaining gap between a first and a last inserted in a circumferential groove of a turbomachine blade of a blade ring is to be closed. This is essentially a two-piece intermediate piece arranged between the feet of the first and the last blade, which can be braced by screw elements on the undercut flanks of the circumferential groove.

Die EP 1 548 232 A1 zeigt die Anordnung von Leitschaufeln einer Strömungsmaschine, wobei die Leitschaufeln Leitschaufelfüße besitzen, die in einer hinterschnittene Flanken aufweisende Umfangsnut eines Leitschaufelträgers formschlüssig aufgenommen sind. Zwischen benachbarten Leitschaufelfüßen sind in der Umfangsnut Füllstücke angeordnet, die den Abstand der Leitschaufelfüße in Umfangsrichtung bestimmen. Um die Füllstücke spielfrei zu fixieren sind am Boden der Umfangsnut nutförmige Ausnehmungen mit darin angeordneten ringförmigen Presssegmenten vorgesehen, die die Füllstücke vom Boden der sie aufnehmenden Umfangsnut wegdrücken, so dass die Füllstücke mit entsprechenden Profilen an den hinterschnittenen Flanken der Umfangsnut kraftschlüssig anliegen. Die Presssegmente können die Montage bzw. Demontage der Füllstücke erheblich erschweren.The EP 1 548 232 A1 shows the arrangement of vanes of a turbomachine, wherein the vanes have Leitschaufelfüße, which are positively received in an undercut edges having circumferential groove of a vane carrier. Between adjacent vanes feet patches are arranged in the circumferential groove, which determine the distance of the guide blade feet in the circumferential direction. In order to fix the filler free of play groove-shaped recesses are provided with annular pressing segments arranged therein, which push away the filler from the bottom of the receiving circumferential groove so that the patches bear frictionally with corresponding profiles on the undercut flanks of the circumferential groove. The press segments can make the assembly or disassembly of the filler considerably more difficult.

Die GB 2156908 A bezieht sich auf eine Rotoranordnung einer Strömungsmaschine. Dabei ist vorgesehen, die Laufschaufeln des Rotors mit entsprechend geformten Laufschaufelfüßen in einen rotorseitigen Aufnahmekanal einzusetzen, wobei die Laufschaufelfüße mit entsprechenden Profilen formschlüssig in Unterschneidungen an den Kanalflanken festgehalten werden. Zur Sicherung der Laufschaufelfüße in Kanallängsrichtung ist ein Verriegelungsstück vorgesehen, welches sich zwischen den Hinterschneidungen der Kanalflanken und dem Kanalboden mittels einer Spannschraube form- und kraftschlüssig verspannen lässt.The GB 2156908 A refers to a rotor assembly of a turbomachine. It is envisaged to use the blades of the rotor with appropriately shaped blade feet in a rotor-side receiving channel, the blade feet are held with appropriate profiles form-fitting in undercuts on the channel flanks. To secure the blade feet in channel longitudinal direction a locking piece is provided, which can be braced between the undercuts of the channel flanks and the channel bottom by means of a clamping screw positively and non-positively.

Die US 5,522,706 betrifft ebenfalls die Sicherung von Laufschaufelfüßen, und zwar in Längsrichtung eines die Laufschaufelfüße aufnehmenden rotorseitigen Kanals. Hier sind beidseitig eines Laufschaufelfußes Riegelstücke angeordnet, die sich nach Anordnung der Laufschaufelfüße im Kanal montieren und innerhalb des Kanals zwischen flankenseitigen Hinterschneidungen und dem Kanalboden durch nicht näher beschriebene Spannelemente (in der Zeichnung sind lediglich andeutungsweise Spannschrauben dargestellt) fixieren lassen. Es wird an keiner Stelle gezeigt oder angedeutet, dass die Riegelstücke den Aufnahmekanal für die Laufschaufelfüße zwischen den Laufschaufeln unter Bildung einer im Wesentlichen störkonturenfreien Oberfläche ausfüllen sollen.The US 5,522,706 also relates to the securing of blade roots, in the longitudinal direction of a rotor-side channel receiving the blade feet. Here are on both sides of a blade root bolt pieces arranged to assemble the arrangement of the blade feet in the channel and within the channel between edge-side undercuts and the channel bottom by clamping elements not described in detail (in the drawing hint at clamping screws). It is not shown or suggested at any point that the locking pieces to fill the receiving channel for the blade feet between the blades to form a substantially sturdy contour-free surface.

Die EP 1 865 153 A2 zeigt die Anordnung von Laufschaufeln an einer Kompressorscheibe. Diese besitzt einen Umfangskanal mit hinterschnittenen Flanken, der entsprechend angepasste Laufschaufelfüße formschlüssig aufnimmt. Zur Sicherung der Laufschaufelfüße ist innerhalb des Aufnahmekanals ein Riegelteil angeordnet, welches im eingesetzten Zustand hinterschnittene Flanken des Aufnahmekanals untergreift und mittels einer Spannschraube, die in eine Vertiefung am Kanalboden eingreift, innerhalb des Kanals kraft- und formschlüssig verspannt werden kann. Auch hier wird weder gezeigt noch angedeutet, dass das Verriegelungsstück zwischen den benachbarten Laufschaufeln eine störkonturenfreie Oberfläche bilden könnte.The EP 1 865 153 A2 shows the arrangement of blades on a compressor disk. This has a peripheral channel with undercut flanks, which accommodates correspondingly adapted blade feet in a form-fitting manner. To secure the blade feet a latch member is disposed within the receiving channel, which engages undercut flanks of the receiving channel in the inserted state and by means of a clamping screw which engages in a depression on the channel bottom, can be clamped positively and positively within the channel. Again, neither is shown nor indicated that the locking piece between the adjacent blades could form a sturgeon contour-free surface.

Die GB 2 171 150 A betrifft die Anordnung von Schaufeln einer Rotoranordnung einer Strömungsmaschine, insbesondere Gasturbine. Die Schaufeln besitzen schaufelseitige Fußstücke, welche sich in einen Aufnahmekanal an der Nabe der Rotoranordnung einsetzen lassen, wobei die Fußstücke und der Kanal gegengleiche Hinterschneidungen aufweisen, die miteinander zusammenwirken und damit die Möglichkeit bieten, die Fußstücke innerhalb des Kanals durch Formschluss festzuhalten. Bei der Montage der Schaufeln an der Rotornabe werden die Schaufeln mit ihren Fußstücken zunächst in einer gegenüber der Sollposition verdrehten Stellung in den Kanal eingeschoben und sodann in die Sollstellung gedreht. Erst durch diese Drehung wird ein Formschluss zwischen den Hinterschneidungen der Fußstücke und des Kanals erreicht. Jedoch haben die Fußstücke zunächst noch ein mehr oder weniger großes Spiel innerhalb des Kanals. Zur Beseitigung des Spiels sind Füllstücke zwischen den Fußstücken vorgesehen. Diese bestehen im Wesentlichen aus einem Innengewindeteil, welches mit seitlichen Flanschen in Aussparungen an den Fußstücken der Schaufeln eingreift. Das Innengewindeteil nimmt ein in seinem Innengewinde schraubverstellbares Außengewindeteil auf, dessen eines Ende durch Schraubverstellung gegen den Boden des Aufnahmekanals spannbar ist, wobei die Flansche des Innengewindeteils die Fußstücke benachbarter Schaufeln aus dem Aufnahmekanal auszuheben suchen. Dabei werden die Fußstücke der Schaufeln mit ihren Hinterschneidungen an den gegengleichen Hinterschneidungen des Kanals verklemmt bzw. verkeilt. Jedes Zwischenstück wird also mittelbar durch die benachbarten im Kanal verklemmten Fußstücke der Schaufeln festgehalten.The GB 2 171 150 A relates to the arrangement of blades of a rotor assembly of a turbomachine, in particular gas turbine. The vanes have scoop-side foot pieces which can be inserted into a receiving channel on the hub of the rotor assembly, wherein the foot pieces and the channel have opposite undercuts, which cooperate with each other and thus provide the ability to hold the foot pieces within the channel by positive locking. When mounting the blades on the rotor hub, the blades are first inserted with their foot pieces in a twisted position relative to the desired position in the channel and then rotated into the desired position. Only by this rotation a positive connection between the undercuts of the foot pieces and the channel is achieved. However, the foot pieces initially have a more or less large game within the channel. To eliminate the game patches between the foot pieces intended. These consist essentially of a female thread part which engages with side flanges in recesses on the foot pieces of the blades. The internal thread part receives a screw threadable in its internal thread male thread part, one end of which is tensioned by screw adjustment against the bottom of the receiving channel, the flanges of the female thread part seek to dig the feet of adjacent blades from the receiving channel. In this case, the foot pieces of the blades are jammed or wedged with their undercuts against the opposite undercuts of the channel. Each intermediate piece is therefore indirectly held by the adjacent jammed in the channel foot pieces of the blades.

Der obige Stand der Technik zeigt keine Schaufelanordnung, bei der zwischen benachbarten Schaufeln bzw. zwischen deren Füßen angeordnete Füllstücke einerseits zwischen den Schaufeln eine im Wesentlichen störkonturenfreie Oberfläche bilden und andererseits innerhalb eines hinterschnittenen Aufnahmekanals form- und kraftschlüssig verspannt werden können.The above prior art does not show a blade arrangement, in which between the blades or between their feet arranged filler between the blades on the one hand form a substantially Störkonturenfreie surface and on the other hand can be clamped positively and non-positively within an undercut receiving channel.

Darstellung der ErfindungPresentation of the invention

Hier setzt die Erfindung ein. Dabei ist es Aufgabe der Erfindung, eine neue Halterung für die Beschaufelung einer Turbine oder dergleichen zu schaffen. Entsprechend bezieht sich die Erfindung auf eine Schaufelanordnung gemäß Anspruch 1. Insbesondere soll dabei eine leichte Austauschbarkeit der Zwischenfüllstücke gewährleistet sein.This is where the invention starts. It is an object of the invention to provide a new support for the blading of a turbine or the like. Accordingly, the invention relates to a blade assembly according to claim 1. In particular, it should be ensured easy interchangeability of Zwischenfüllstücke.

Hierzu ist erfindungsgemäß vorgesehen, dass die Zwischenfüllstücke zum Kanalboden im Wesentlichen senkrechte Gewindebohrungen mit darin eingedrehten Schrauben aufweisen, die durch Schraubverstellung gegen den Kanalboden spannbar sind.For this purpose, the invention provides that the intermediate filling pieces for the channel bottom have substantially vertical threaded holes with screws screwed therein, which can be tensioned by screw adjustment against the channel bottom.

Die Erfindung beruht auf dem allgemeinen Gedanken, an den Zwischenfüllstücken Schrauben anzuordnen, mit denen sich die Zwischenfüllstücke im Aufnahmekanal kraftschlüssig fixieren lassen. Die Schrauben sind zudem unverlierbar angeordnet.The invention is based on the general idea of arranging screws on the intermediate filling pieces with which the intermediate filling pieces can be fixed non-positively in the receiving channel. The screws are also arranged captive.

Da sich auf diese Weise jedes Zwischenfüllstück separat im Aufnahmekanal verspannen lässt, kann jedes Zwischenfüllstück unabhängig von anderen Füllstücken justiert und fixiert werden. Darüber hinaus ist auch eine Demontage des Zwischenfüllstücks leicht möglich.Since in this way each intermediate filling piece can be clamped separately in the receiving channel, each intermediate filling piece can be adjusted and fixed independently of other filling pieces. In addition, a disassembly of the intermediate filler is easily possible.

Im übrigen wird hinsichtlich bevorzugter Merkmale der Erfindung auf die Ansprüche und die nachfolgende Erläuterung der Zeichnung verwiesen, anhand der eine bevorzugte Ausführungsform der Erfindung näher beschrieben wird.Moreover, reference is made with regard to preferred features of the invention to the claims and the following explanation of the drawing, on the basis of a preferred embodiment of the invention will be described in more detail.

Schutz wird nicht nur für angegebene oder dargestellte Merkmalskombinationen sondern auch für prinzipiell beliebige Kombinationen der angegebenen oder dargestellten Einzelmerkmale beansprucht.Protection is claimed not only for specified or illustrated feature combinations but also for any combinations of the specified or illustrated individual features.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

In der Zeichnung zeigen

Fig. 1
eine perspektivische Darstellung eines Verdichtergehäusesegmentes mit Aufnahmekanal und darin aufgenommenen Beschaufelung,
Fig. 2
eine Draufsicht dieses Gehäusesegmentes entsprechend dem Pfeil II in Fig. 1,
Fig. 3
ein Schnittbild entsprechend der Schnittlinie III-III in Fig. 2 und
Fig. 4
ein Schnittbild entsprechend der Schnittlinie IV-IV in Fig. 2.
In the drawing show
Fig. 1
a perspective view of a compressor housing segment with receiving channel and received therein blading,
Fig. 2
a plan view of this housing segment according to the arrow II in Fig. 1 .
Fig. 3
a sectional view corresponding to the section line III-III in Fig. 2 and
Fig. 4
a sectional view corresponding to the section line IV-IV in Fig. 2 ,

Wege zur Ausführung der ErfindungWays to carry out the invention

Nachfolgend soll die Erfindung anhand eines Ausführungsbeispieles und der Fig. 1 bis 4 näher erläutert werden.The invention is based on an embodiment and the Fig. 1 to 4 be explained in more detail.

Gemäß Fig. 1 und Fig. 2 besitzt ein Verdichtergehäusesegment 1 auf der seiner den zu verdichtenden Gasstrom zugewandten Seite einen Aufnahmekanal 2 mit umlaufenden Stegen 9. Dabei werden im dargestellten Beispiel durch die an den Kanalflanken angeordnete stegartige Vorsprünge Hinterschneidungen gebildet. In den Aufnahmekanal 2 sind Leitschaufeln 3 mit an ihnen angeformten, dem Querschnitt des Aufnahmekanals 2 angepassten Fußstücken eingesetzt. Zwischen den Fußstücken benachbarter Leitschaufeln 3 sind jeweils dem Kanalquerschnitt angepasste Zwischenfüllstücke 4 angeordnet, die einerseits den Kanal 2 ausfüllen, sodass das Gehäusesegment 1 gasstromseitig eine im Wesentlichen störkonturenfreie Oberfläche erhält. Andererseits wird durch die Zwischenfüllstücke 4 ein vorgegebener Abstand zwischen benachbarten Leitschaufeln 3 sichergestellt.According to Fig. 1 and Fig. 2 has a compressor housing segment 1 on its side facing the gas stream to be compressed side facing a receiving channel 2 with circumferential webs 9. In this case, undercuts are formed in the example shown by the arranged on the channel flanks web-like projections. In the receiving channel 2 guide vanes 3 are used with molded on them, the cross-section of the receiving channel 2 adapted feet inserted. Between the foot pieces of adjacent guide vanes 3, the channel cross-section adapted Zwischenfüllstücke 4 are arranged, on the one hand fill the channel 2, so that the housing segment 1 gas flow side receives a substantially Störkonturenfreie surface. On the other hand, by the Between filler 4 a predetermined distance between adjacent vanes 3 ensured.

Gemäß den Figuren 3 und 4 werden die Zwischenfüllstücke 4 jeweils von einer zum Boden des Aufnahmekanals 2 im Wesentlichen senkrechten Gewindebohrung durchsetzt, die eine Schraube 5 aufnimmt. Diese Gewindebohrung mündet auf der dem Kanalboden zugewandten Seite der Zwischenfüllstücke 4 in eine dort angeordnete zum Kanalboden hin geöffnete Vertiefung 6, die ein an der Schraube 5 angeordnetes Endstück 7 aufzunehmen vermag. Am vom Endstück 7 abgewandten Ende der Schraube 5 ist ein Innensechskant 8 oder dergleichen zum Ansetzen eines Schraubwerkzeuges vorgesehen, mit dem sich die Schraube 5 in der Gewindebohrung des Zwischenfüllstückes 4 schraubverstellen lässt. Erfindungsgemäß ist nun vorgesehen, die Schrauben 5 mittels des vorgenannten Schraubwerkzeugs mit ihren Endstücken 7 gegen den Boden des Aufnahmekanals 2 zu spannen. Damit wird der Formschluss des jeweiligen Zwischenfüllstückes 4 mit den Hinterschneidungen an den Flanken des Aufnahmekanals 2 (umlaufende Stege 9) unter kraftschlüssiger Fixierung des jeweiligen Zwischenfüllstückes 4 spielfrei gemacht.According to the FIGS. 3 and 4 the intermediate filling pieces 4 are penetrated in each case by a threaded hole which is substantially perpendicular to the bottom of the receiving channel 2 and which receives a screw 5. This threaded hole opens on the side of the intermediate filling pieces 4 facing the channel bottom into a recess 6 which is open towards the channel bottom and which is able to receive an end piece 7 arranged on the screw 5. At the end facing away from the end 7 of the screw 5, a hexagon socket 8 or the like is provided for applying a screwing, with which the screw 5 can be schraubverstellen in the threaded bore of the intermediate filler 4. According to the invention, it is now provided to tension the screws 5 by means of the abovementioned screwing tool with their end pieces 7 against the bottom of the receiving channel 2. Thus, the positive connection of the respective Zwischenfüllstückes 4 with the undercuts on the flanks of the receiving channel 2 (circumferential webs 9) under non-positive fixing of the respective intermediate filler 4 made free of play.

Im Beispiel der Fig. 4 sind an den Flanken des Kanals 2 stegartige Vorsprünge 9 angeformt, die in entsprechende Nuten an den Flanken der Zwischenfüllstücke 4 hineinragen. Wenn nun die Schraube 5 durch Schraubverstellung mit ihrem Endstück 7 gegen den Boden des Aufnahmekanals 2 gespannt wird, tritt eine entsprechende Pressung zwischen der dem Kanalboden zugewandten Seitenfläche des Steges 9 und der dieser Seitenfläche zugewandten Seitenfläche der im Zwischenfüllstück 4 ausgebildeten Nut auf.In the example of Fig. 4 2 web-like projections 9 are formed on the flanks of the channel, which protrude into corresponding grooves on the flanks of the intermediate filling 4. Now, if the screw 5 is tightened by screw adjustment with its end piece 7 against the bottom of the receiving channel 2, occurs a corresponding pressure between the channel bottom facing side surface of the web 9 and the side surface facing side surface of the formed in the intermediate filler 4 groove.

Soweit die Schraube 5 mit ihrem Gewindeteil im verspannten Zustand des Zwischenfüllstücks 4 aus dessen vom Kanalboden abgewandter Oberseite herausragt, erfolgt eine Nachbearbeitung, um ein mit der Oberseite des Zwischenfüllstücks 4 fluchtendes Stirnende zu gewährleisten. Ggf. kann auch die genannte Oberseite des Zwischenfüllstückes 4 nachbearbeitet werden, um einen glatten Übergang zu den angrenzenden Flächen des Gehäusesegmentes 1 zu gewährleisten. Auf diese Weise wird zwischen den Leitschaufeln eine störkonturenfreie Grenzfläche für den Fluidstrom der Strömungsmaschine geschaffen.As far as the screw 5 protrudes with its threaded part in the clamped state of the intermediate filler 4 from its top side facing away from the channel bottom, a post-processing to ensure an aligned with the top of the intermediate 4 piece front end. Possibly. can also be reworked the said top of the Zwischenfüllstückes 4, to ensure a smooth transition to the adjacent surfaces of the housing segment 1. In this way, a sturdy contours-free interface for the fluid flow of the turbomachine is created between the vanes.

Gegen Lösen wird die Schraube 5 gesichert.Against loosening the screw 5 is secured.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
VerdichtergehäusesegmentCompressor housing segment
22
Aufnahmekanalreceiving channel
33
Leitschaufelnvanes
44
ZwischenfüllstückeZwischenfüllstücke
55
Schraubescrew
66
Vertiefungdeepening
77
Endstücktail
88th
InnensechskantAllen
99
umlaufende Stege, stegartige Vorsprüngecircumferential webs, web-like projections

Claims (4)

  1. Blade arrangement, in particular stator blade arrangement, comprising blades (3), intermediate fillers (4) and a wall (1) of a fluid flow path of a turbomachine, in particular a gas turbine, wherein to hold the blades, correspondingly adapted blade-side feet and intermediate fillers (4) separating these feet are held by form fit and fixed by force fit in a receiving channel (2) with undercut flanks which is formed in the wall, and wherein the intermediate fillers (4) fill the channel (2), forming a surface between the blade-side feet on the gas flow side which is substantially free from interference contours, and that substantially vertical threaded bores with screws (5) inserted therein are provided in the intermediate fillers (4) down to the channel base and are braced against the channel base by the screw setting, characterised in that stepped protrusions (9) extending in the channel longitudinal direction are arranged on the flanks of the receiving channel (2), and that the sides of the intermediate fillers (4) facing the channel flanks are provided with correspondingly shaped grooves for receiving the stepped protrusions.
  2. Blade arrangement according to claim 1, characterised in that the screws (5) can be braced against the channel base with a pad-like end piece (7) which has a greater cross-section than the threaded portion of the screws (5).
  3. Blade arrangement according to claim 1 or 2, characterised in that the screws (5) have a threaded part in the manner of an endless screw, the end face of which facing away from the channel base is provided with an opening of non-round cross-section for receiving a screw tool.
  4. Blade arrangement according to any of claims 1 to 3, characterised in that on mounting of the intermediate fillers (4) in the receiving channel, the end piece (7) of the screws (5) is received by a recess (6) in the side of the respective intermediate filler (4) facing the channel base.
EP11185808.0A 2010-10-27 2011-10-19 Blade arrangement, especially stator blade arrangement Active EP2447474B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01787/10A CH703997A1 (en) 2010-10-27 2010-10-27 Blade assembly, in particular vane.

Publications (2)

Publication Number Publication Date
EP2447474A1 EP2447474A1 (en) 2012-05-02
EP2447474B1 true EP2447474B1 (en) 2017-12-06

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EP11185808.0A Active EP2447474B1 (en) 2010-10-27 2011-10-19 Blade arrangement, especially stator blade arrangement

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US (1) US8979497B2 (en)
EP (1) EP2447474B1 (en)
CH (1) CH703997A1 (en)

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
CH705377A1 (en) * 2011-08-09 2013-02-15 Alstom Technology Ltd A process for reconditioning a rotor of a turbomachine.
FR3078100B1 (en) * 2018-02-16 2020-03-20 Safran Aircraft Engines BLADED CROWN FOR TURBOMACHINE STATOR OF WHICH THE BLADES ARE CONNECTED TO THE EXTERNAL RUBBER BY CONICAL SUPPORT AND FRANGIBLE PIONE

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Publication number Priority date Publication date Assignee Title
US3216700A (en) * 1963-10-24 1965-11-09 Gen Electric Rotor blade locking means
GB2156908A (en) * 1984-03-30 1985-10-16 Rolls Royce Bladed rotor assembly for gas turbine engine
GB2171150B (en) * 1985-02-12 1989-07-26 Rolls Royce Plc Bladed rotor assembly for a turbomachine
US5522706A (en) * 1994-10-06 1996-06-04 General Electric Company Laser shock peened disks with loading and locking slots for turbomachinery
FR2832455B1 (en) * 2001-11-22 2004-04-02 Snecma Moteurs DEVICE FOR LOCKING BLADES IN A GROOVE OF A DISC
DE10310432A1 (en) * 2003-03-11 2004-09-23 Alstom Technology Ltd Rotor end
DE10346239A1 (en) * 2003-10-06 2005-04-21 Alstom Technology Ltd Baden Method for fixing the blading of a turbomachine and fixing device
EP1548232A1 (en) * 2003-12-23 2005-06-29 Siemens Aktiengesellschaft Turbomachine comprising a stator vane support and method of mounting stator vanes to the stator vane support
US7435055B2 (en) * 2005-03-29 2008-10-14 Siemens Power Generation, Inc. Locking spacer assembly for a turbine engine
EP1803900A1 (en) * 2006-01-02 2007-07-04 Siemens Aktiengesellschaft Closure unit for the remaining space between the first and the last blades of a bladed ring inserted in a circumferencial slot of a turbomachine, and corresponding turbomachine
US8608446B2 (en) * 2006-06-05 2013-12-17 United Technologies Corporation Rotor disk and blade arrangement

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Also Published As

Publication number Publication date
US20120107111A1 (en) 2012-05-03
CH703997A1 (en) 2012-04-30
EP2447474A1 (en) 2012-05-02
US8979497B2 (en) 2015-03-17

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