EP1319844B1 - Shroude for retaining blade shafts of adjustable stator vanes in a high pressure compressor of a gas turbine - Google Patents

Shroude for retaining blade shafts of adjustable stator vanes in a high pressure compressor of a gas turbine Download PDF

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Publication number
EP1319844B1
EP1319844B1 EP02023209A EP02023209A EP1319844B1 EP 1319844 B1 EP1319844 B1 EP 1319844B1 EP 02023209 A EP02023209 A EP 02023209A EP 02023209 A EP02023209 A EP 02023209A EP 1319844 B1 EP1319844 B1 EP 1319844B1
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EP
European Patent Office
Prior art keywords
shroud
cover
accordance
support
annular
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.)
Expired - Fee Related
Application number
EP02023209A
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German (de)
French (fr)
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EP1319844A1 (en
Inventor
Norbert Wolf
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.)
Rolls Royce Deutschland Ltd and Co KG
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Rolls Royce Deutschland Ltd and Co KG
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Publication date
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Publication of EP1319844A1 publication Critical patent/EP1319844A1/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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/243—Flange connections; Bolting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • 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
    • F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor

Definitions

  • the invention relates to a bearing ring for supporting blade roots of adjustable stator blades in the high-pressure compressor of a gas turbine, and in particular to a bearing ring according to the features of the preamble of claim 1.
  • the invention relates to a bearing ring (Shroud), as used in particular in high-pressure compressors modern turbofan engines for internal storage of the adjustable stator blades in the field of high pressure compressor.
  • bearing rings or shrouds are usually made of aluminum, steel alloys or titanium.
  • a construction of this kind shows, for example, the US 5,062,767 A , which shows a bearing ring according to the features of the preamble of claim 1.
  • the bearing rings are usually constructed in two parts, so that a front and a rear body are available. These basic bodies are each annular. To reduce weight, an axial annular space is formed, which is turned off, for example. In order to reduce air turbulence, vibrations and noise developments, the annular space is provided in the prior art with a rubber filling. This is introduced by means of a vulcanization process.
  • the invention has for its object to provide a bearing ring of the type mentioned above, which avoids the disadvantages of the prior art with a simple structure and simple, cost-effective manufacturability and in particular has a low weight.
  • annular cover body in the opening region of the annular space, an annular cover body is arranged, which is provided with mounting recesses. Furthermore, it is provided that a tubular support element is arranged in the intermediate region between the mounting recess of the cover body and the associated mounting hole of the base body.
  • the bearing ring according to the invention is characterized by a number of significant advantages.
  • annular covering body is used instead of the rubber filling subject to the above-mentioned disadvantages.
  • An essential advantage of the solution according to the invention is that it can be produced easily and quickly.
  • the complex operations that are required for introducing a rubber filling, can thus be completely eliminated. This results in a significant cost advantage over the prior art.
  • Another major advantage is that no age-prone materials, such as rubber, are used. This increases the reliability as well as the life.
  • Another advantage lies in the weight reduction to be achieved, since much less material is needed than in a filling with rubber or other filling materials.
  • the covering body according to the invention is used for covering in the mouth region of the annulus, no other structural changes to the body are required. It is thus possible to retrofit existing body after removing the rubber filling accordingly.
  • the cover can be easily removed and replaced at any time, for example during maintenance or other work.
  • the covering body is formed substantially in the form of a flat ring. This can be made in a simple manner, for example, from a metallic sheet, such as aluminum or titanium. Especially It is also advantageous if the cover body is profiled at least at its edges. A flanging or an edge can thus lead to a particularly advantageous clamping or to an interference fit, so that the cover body can be used reliably in the annular space.
  • stiffening measures such as beads or the like may be used.
  • the support element is preferably cup-shaped or hat-shaped. Like the cover body, it can be produced from a metallic sheet, by rolling or deep-drawing or by means of a similar forming process. It is particularly favorable if the free edge region of the support element is profiled for holding the covering body, for example bent or crimped.
  • the support member thus anchors the cover body and biases it against the base body, so that there is a secure attachment.
  • the bias is done by means of connecting screws, which also serve to clamp the two main body of the bearing ring.
  • the dimensioning of the support body is preferably chosen so that they are slightly shorter than the depth of the annular space of the body.
  • the gap size may be 0.5 mm, for example.
  • cover body and the support elements may be formed in one piece or in several parts.
  • cover body and the support elements may be produced in one piece or in several parts.
  • cover body and / or the support elements made of plastic or similar material, for example by means of a spraying process.
  • the Fig. 1 shows in a highly simplified manner a portion of a known from the prior art gas turbine.
  • the area A indicates the positioning of a bearing ring for the storage of stator blades 2.
  • the further description of the schematically indicated components can be dispensed with, since these are known from the prior art.
  • Fig. 2 is a perspective exploded view of a known from the prior art bearing ring shown, comprising a front body 3 and a rear body 4.
  • the two main body 3, 4 are each end turned and provided with a rubber filling 12 in the annular space 5 formed in this case.
  • the two basic bodies 1, 2 are each half recesses 14 introduced, the (see Fig. 3 ) serve for the storage of bushes 13, which in turn store a blade root 1 of the respective stator blade 2.
  • the stator blades 2 are rotatable in a known manner to change the angle of attack can. As a result, the performance of the compressor or compressor is adaptable to the operating conditions.
  • corresponding mounting holes 6 in the basic bodies 3, 4 are provided.
  • the Fig. 4 shows a simplified sectional view of the embodiment of the bearing ring according to the invention. This comprises, as already described, a front base body 3 and a rear base body 4. These are each provided with said mounting holes 6.
  • the Fig. 4 further shows the two substantially U-shaped annular spaces 5, which are each axially open.
  • Fig. 4 is a substantially flat, annular cover body 7 is shown (see also FIGS. 5 and 6 ), which is provided with a corresponding number of mounting recesses 8, which are aligned with the mounting holes 6 in order to perform the screws 15 can.
  • each hat-shaped or cup-shaped support member 9 is inserted, which, as well as from Fig. 7 can be seen, is provided with a central recess 17 in order to perform the screw 15 can.
  • Fig. 4 further shows that an edge 10 of the cover body 7 is profiled or bent to ensure a tight tight fit in the annulus 5. Similarly, an edge portion 11 of the support member 9 is bent or profiled to hold the cover body 7 and bias. For this purpose, the length of the support element 9 is slightly smaller than the available depth in the annular space 5, so that when tightening the screw 15, a corresponding tension of the cover body 7 results.
  • the Fig. 6 shows in a perspective partial view of the annular cover body 7, while in the illustration of Fig. 5 in a schematic way, the individual support elements 9 are shown in addition to the cover body 7.

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

Description

Die Erfindung bezieht sich auf einen Lagerring zur Lagerung von Schaufelfüßen von verstellbaren Statorschaufeln im Hochdruckverdichter einer Gasturbine, und dabei insbesondere auf einen Lagerring nach den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a bearing ring for supporting blade roots of adjustable stator blades in the high-pressure compressor of a gas turbine, and in particular to a bearing ring according to the features of the preamble of claim 1.

Im Einzelnen betrifft die Erfindung einen Lagerring (Shroud), wie er insbesondere bei Hochdruckverdichtern moderner Turbofan-Triebwerke zur inneren Lagerung der verstellbaren Statorschaufeln im Bereich der Hochdruckverdichter eingesetzt wird.In detail, the invention relates to a bearing ring (Shroud), as used in particular in high-pressure compressors modern turbofan engines for internal storage of the adjustable stator blades in the field of high pressure compressor.

Derartige Lagerringe oder Shrouds werden üblicherweise aus Aluminium, aus Stahllegierungen oder aus Titan gefertigt. Eine Konstruktion dieser Art zeigt beispielsweise die US 5,062,767 A , die einen Lagerring nach den Merkmalen des Oberbegriffs des Anspruchs 1 zeigt.Such bearing rings or shrouds are usually made of aluminum, steel alloys or titanium. A construction of this kind shows, for example, the US 5,062,767 A , which shows a bearing ring according to the features of the preamble of claim 1.

Die Lagerringe (Shrouds) sind üblicherweise zweiteilig ausgebaut, so dass ein vorderer und ein hinterer Grundkörper vorhanden sind. Diese Grundkörper sind jeweils ringförmig. Zur Gewichtsreduzierung ist ein axialer Ringraum ausgebildet, der beispielsweise ausgedreht wird. Um Luftverwirbelungen, Vibrationen und Geräuschentwicklungen zu mindern, wird der Ringraum im Stand der Technik mit einer Gummifüllung versehen. Diese wird mittels eines Vulkanisiervorganges eingebracht.The bearing rings (shrouds) are usually constructed in two parts, so that a front and a rear body are available. These basic bodies are each annular. To reduce weight, an axial annular space is formed, which is turned off, for example. In order to reduce air turbulence, vibrations and noise developments, the annular space is provided in the prior art with a rubber filling. This is introduced by means of a vulcanization process.

Derartige Gummifüllungen weisen eine Reihe von Nachteilen auf. Zum einen ist der Herstellvorgang sehr aufwendig, da er einen manuell durchzuführenden Spezialprozess benötigt, der zeitintensiv und damit teuer ist. Dieser Spezialprozess umfasst üblicherweise mehrere Arbeitsschritte, insbesondere das Reinigen, Grundieren, Befüllen, Wärmebehandeln sowie das Abtrennen überschüssigen Gummimaterials und eine anschließende nochmalige Reinigung des Grundkörpers des Lagerrings. Durch mangelnde Haftung des Gummimaterials oder durch Blasenbildung können sich Qualitätsprobleme ergeben. Während des Betriebs erweist sich die Gummifüllung als störungsanfällig, da sie altert und da es zu Rissen an den Verbindungsstellen kommen kann. Zudem ergibt sich ein relativ hohes Gewicht der Gummifüllung.Such rubber fillings have a number of disadvantages. On the one hand, the manufacturing process is very complicated, since it requires a manual process to be performed, which is time-consuming and therefore expensive. This special process usually involves several steps, in particular the cleaning, priming, filling, heat treatment and the separation of excess rubber material and a subsequent repeated Cleaning the body of the bearing ring. Lack of adhesion of the rubber material or blistering can result in quality problems. During operation, the rubber filling proves to be prone to failure as it ages and there may be cracks at the joints. In addition, there is a relatively high weight of the rubber filling.

Der Erfindung liegt die Aufgabe zugrunde, einen Lagerring der eingangs genannten Art zu schaffen, welcher bei einfachem Aufbau und einfacher, kostengünstiger Herstellbarkeit die Nachteile des Standes der Technik vermeidet und insbesondere ein geringes Gewicht aufweist.The invention has for its object to provide a bearing ring of the type mentioned above, which avoids the disadvantages of the prior art with a simple structure and simple, cost-effective manufacturability and in particular has a low weight.

Erfindungsgemäß wird die Aufgabe durch die Merkmalskombination des Hauptanspruchs gelöst, die Unteransprüche zeigen weitere vorteilhafte Ausgestaltungen der Erfindung.According to the invention the object is achieved by the feature combination of the main claim, the subclaims show further advantageous embodiments of the invention.

Erfindungsgemäß ist somit vorgesehen, dass im Öffnungsbereich des Ringraums ein ringförmiger Abdeckkörper angeordnet ist, welcher mit Montageausnehmungen versehen ist. Weiterhin ist vorgesehen, dass im Zwischenbereich zwischen der Montageausnehmung des Abdeckkörpers und der zugeordneten Montagebohrung des Grundkörpers ein rohrartiges Stützelement angeordnet ist.According to the invention it is thus provided that in the opening region of the annular space, an annular cover body is arranged, which is provided with mounting recesses. Furthermore, it is provided that a tubular support element is arranged in the intermediate region between the mounting recess of the cover body and the associated mounting hole of the base body.

Der erfindungsgemäße Lagerring zeichnet sich durch eine Reihe erheblicher Vorteile aus.The bearing ring according to the invention is characterized by a number of significant advantages.

Erfindungsgemäß wird somit an Stelle der mit den oben genannten Nachteilen behafteten Gummifüllung ein ringförmiger Abdeckkörper eingesetzt. Es ergibt sich somit eine sehr ähnliche oder identische Außengeometrie des Grundkörpers, verglichen mit einem mit Gummi gefüllten Grundkörper. Die akustischen Eigenschaften sowie die Strömungsverhältnisse, die zu Luftverwirbelungen oder Vibrationen führen können, sind somit in sehr günstiger Weise ausgeführt und erzielen zumindest die Werte der aus dem Stand der Technik bekannten Lagerringe.According to the invention, instead of the rubber filling subject to the above-mentioned disadvantages, an annular covering body is used. This results in a very similar or identical outer geometry of the body, compared with a filled with rubber body. The acoustic properties as well as the flow conditions, which can lead to air turbulences or vibrations, are thus in great expediently carried out and achieve at least the values of known from the prior art bearing rings.

Ein wesentlicher Vorteil der erfindungsgemäßen Lösung besteht darin, dass diese einfach und schnell herstellbar ist. Die aufwendigen Arbeitsgänge, die zum Einbringen einer Gummifüllung erforderlich sind, können somit gänzlich entfallen. Hierdurch ergibt sich ein deutlicher Kostenvorteil gegenüber dem Stand der Technik.An essential advantage of the solution according to the invention is that it can be produced easily and quickly. The complex operations that are required for introducing a rubber filling, can thus be completely eliminated. This results in a significant cost advantage over the prior art.

Ein weiterer, wesentlicher Vorteil liegt darin, dass keine alterungsanfälligen Werkstoffe, wie etwa Gummi, zur Anwendung gelangen. Hierdurch erhöht sich die Zuverlässigkeit ebenso wie die Lebensdauer.Another major advantage is that no age-prone materials, such as rubber, are used. This increases the reliability as well as the life.

Ein weiterer Vorteil liegt in der zu erzielenden Gewichtsreduzierung, da weitaus weniger Werkstoff benötigt wird als bei einer Füllung mit Gummi oder sonstigen Füllmaterialien.Another advantage lies in the weight reduction to be achieved, since much less material is needed than in a filling with rubber or other filling materials.

Da der erfindungsgemäße Abdeckkörper zur Abdeckung in den Mündungsbereich des Ringraums eingesetzt wird, sind keine sonstigen konstruktiven Änderungen an dem Grundkörper erforderlich. Es ist somit möglich, vorhandene Grundkörper nach Entfernen der Gummifüllung entsprechend umzurüsten.Since the covering body according to the invention is used for covering in the mouth region of the annulus, no other structural changes to the body are required. It is thus possible to retrofit existing body after removing the rubber filling accordingly.

Vorteilhaft ist es auch, dass der Abdeckkörper jederzeit leicht entfernt und wieder eingesetzt werden kann, beispielsweise bei Wartungsmaßnahmen oder sonstigen Arbeiten.It is also advantageous that the cover can be easily removed and replaced at any time, for example during maintenance or other work.

In einer besonders günstigen Ausgestaltung der Erfindung ist vorgesehen, dass der Abdeckkörper im Wesentlichen in Form eines flachen Rings ausgebildet ist. Dieser kann in einfacher Weise beispielsweise aus einem metallischen Blech gefertigt werden, beispielsweise aus Aluminium oder Titan. Besonders günstig ist es auch, wenn der Abdeckkörper zumindest an seinen Rändern profiliert ausgebildet ist. Eine Umbördelung oder ein Rand kann somit zu einer besonders vorteilhaften Klemmung oder zu einem Presssitz führen, so dass der Abdeckkörper betriebssicher in den Ringraum einsetzbar ist.In a particularly advantageous embodiment of the invention it is provided that the covering body is formed substantially in the form of a flat ring. This can be made in a simple manner, for example, from a metallic sheet, such as aluminum or titanium. Especially It is also advantageous if the cover body is profiled at least at its edges. A flanging or an edge can thus lead to a particularly advantageous clamping or to an interference fit, so that the cover body can be used reliably in the annular space.

Zur Verhinderung von Vibrationen oder Ähnlichem können auch zusätzliche Versteifungsmaßnahmen, wie etwa Sicken oder Ähnliches verwendet werden.To prevent vibrations or the like, additional stiffening measures such as beads or the like may be used.

Das Stützelement ist bevorzugterweise napfförmig oder hütchenförmig ausgebildet. Es kann ebenso wie der Abdeckkörper aus einem metallischen Blech, durch Rollen oder Tiefziehen oder mittels eines ähnlichen Umformvorganges hergestellt werden. Besonders günstig ist es, wenn der freie Randbereich des Stützelements zur Halterung des Abdeckkörpers profiliert ist, beispielsweise umgebogen oder gebördelt. Das Stützelement verankert somit den Abdeckkörper und spannt diesen gegen den Grundkörper vor, so dass sich eine sichere Befestigung ergibt. Die Vorspannung erfolgt mittels Verbindungsschrauben, die auch zum Verspannen der beiden Grundkörper des Lagerrings dienen. Die Dimensionierung der Stützkörper ist bevorzugterweise so gewählt, dass diese geringfügig kürzer sind als die Tiefe des Ringraums des Grundkörpers. Das Spaltmaß kann beispielsweise 0,5 mm betragen. Durch die Verschraubung erfolgt somit eine Vorspannung des Abdeckkörpers.The support element is preferably cup-shaped or hat-shaped. Like the cover body, it can be produced from a metallic sheet, by rolling or deep-drawing or by means of a similar forming process. It is particularly favorable if the free edge region of the support element is profiled for holding the covering body, for example bent or crimped. The support member thus anchors the cover body and biases it against the base body, so that there is a secure attachment. The bias is done by means of connecting screws, which also serve to clamp the two main body of the bearing ring. The dimensioning of the support body is preferably chosen so that they are slightly shorter than the depth of the annular space of the body. The gap size may be 0.5 mm, for example. By screwing thus a bias of the cover body.

Der Abdeckkörper und die Stützelemente können einstückig oder mehrteilig ausgebildet sein. An Stelle der beschriebenen Herstellung aus metallischen Werkstoffen ist es auch möglich, den Abdeckkörper und/oder die Stützelemente aus Kunststoff oder ähnlichem Material herzustellen, beispielsweise mittels eines Spritzverfahrens.The cover body and the support elements may be formed in one piece or in several parts. Instead of the described production of metallic materials, it is also possible to produce the cover body and / or the support elements made of plastic or similar material, for example by means of a spraying process.

Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Dabei zeigt:

Fig. 1
eine schematische Darstellung eines Teilbereichs einer Gasturbine,
Fig. 2
eine perspektivische Darstellung eines zweiteiligen Lagerrings nach dem Stand der Technik,
Fig. 3
eine vergrößerte Teil-Darstellung analog Fig. 2 eines aus dem Stand der Technik bekannten Lagerrings,
Fig. 4
eine Teil-Schnittansicht eines Ausführungsbeispiels des erfindungsgemäßen Lagerrings,
Fig. 5
eine vereinfachte perspektivische Teilansicht eines erfindungsgemäßen Abdeckkörpers mit Stützelementen,
Fig. 6
eine perspektivische Darstellung, analog Fig. 5, des erfindungsgemäßen Abdeckkörpers, und
Fig. 7
eine vereinfachte perspektivische Darstellung eines Ausführungsbeispiels des erfindungsgemässen Stützelements.
In the following the invention will be described by means of an embodiment in conjunction with the drawing. Showing:
Fig. 1
a schematic representation of a portion of a gas turbine,
Fig. 2
a perspective view of a two-piece bearing ring according to the prior art,
Fig. 3
an enlarged partial view analog Fig. 2 a bearing ring known from the prior art,
Fig. 4
a partial sectional view of an embodiment of the bearing ring according to the invention,
Fig. 5
a simplified perspective partial view of a cover body according to the invention with support elements,
Fig. 6
a perspective view, analog Fig. 5 , the cover body according to the invention, and
Fig. 7
a simplified perspective view of an embodiment of the inventive support element.

Die Fig. 1 zeigt in stark vereinfachter Weise einen Teilbereich einer aus dem Stand der Technik bekannten Gasturbine. Der Bereich A kennzeichnet die Positionierung eines Lagerrings zur Lagerung von Statorschaufeln 2. Auf die weitere Beschreibung der schematisch angedeuteten Bauelemente kann verzichtet werden, da diese aus dem Stand der Technik bekannt sind.The Fig. 1 shows in a highly simplified manner a portion of a known from the prior art gas turbine. The area A indicates the positioning of a bearing ring for the storage of stator blades 2. The further description of the schematically indicated components can be dispensed with, since these are known from the prior art.

In Fig. 2 ist in perspektivischer Explosionsdarstellung ein aus dem Stand der Technik bekannter Lagerring gezeigt, der einen vorderen Grundkörper 3 und einen hinteren Grundkörper 4 umfasst. Die beiden Grundkörper 3, 4 sind stirnseitig jeweils ausgedreht und mit einer Gummifüllung 12 in dem hierbei gebildeten Ringraum 5 versehen. In den beiden Grundkörpern 1, 2 sind jeweils hälftig Ausnehmungen 14 eingebracht, die (siehe Fig. 3) zur Lagerung von Buchsen 13 dienen, welche wiederum einen Schaufelfuß 1 der jeweiligen Statorschaufel 2 lagern. Die Statorschaufeln 2 sind in bekannter Weise drehbar, um deren Anstellwinkel ändern zu können. Hierdurch ist die Leistung des Verdichters oder Kompressors an die Betriebsbedingungen anpassbar.In Fig. 2 is a perspective exploded view of a known from the prior art bearing ring shown, comprising a front body 3 and a rear body 4. The two main body 3, 4 are each end turned and provided with a rubber filling 12 in the annular space 5 formed in this case. In the two basic bodies 1, 2 are each half recesses 14 introduced, the (see Fig. 3 ) serve for the storage of bushes 13, which in turn store a blade root 1 of the respective stator blade 2. The stator blades 2 are rotatable in a known manner to change the angle of attack can. As a result, the performance of the compressor or compressor is adaptable to the operating conditions.

Eine Verschraubung der beiden Grundkörper 3, 4 erfolgt mittels einer Vielzahl von Schrauben 15 und Muttern 16. Hierzu sind entsprechende Montagebohrungen 6 in den Grundkörpern 3, 4 vorgesehen.A screwing of the two base body 3, 4 by means of a plurality of screws 15 and nuts 16. For this purpose, corresponding mounting holes 6 in the basic bodies 3, 4 are provided.

Die Fig. 4 zeigt in vereinfachter Schnittansicht die erfindungsgemäße Ausgestaltung des Lagerrings. Dieser umfasst, wie bereits beschrieben, einen vorderen Grundkörper 3 und einen hinteren Grundkörper 4. Diese sind jeweils mit den genannten Montagebohrungen 6 versehen. Die Fig. 4 zeigt weiterhin die beiden im Wesentlichen U-förmigen Ringräume 5, die axial jeweils offen sind.The Fig. 4 shows a simplified sectional view of the embodiment of the bearing ring according to the invention. This comprises, as already described, a front base body 3 and a rear base body 4. These are each provided with said mounting holes 6. The Fig. 4 further shows the two substantially U-shaped annular spaces 5, which are each axially open.

In Fig. 4 ist ein im Wesentlichen flacher, ringförmiger Abdeckkörper 7 dargestellt (siehe auch Fig. 5 und 6), welcher mit einer entsprechenden Anzahl an Montageausnehmungen 8 versehen ist, die zu den Montagebohrungen 6 fluchten, um die Schrauben 15 durchführen zu können.In Fig. 4 is a substantially flat, annular cover body 7 is shown (see also FIGS. 5 and 6 ), which is provided with a corresponding number of mounting recesses 8, which are aligned with the mounting holes 6 in order to perform the screws 15 can.

In die Montageausnehmungen 8 ist jeweils ein hütchenförmiges oder napfförmiges Stützelement 9 eingesetzt, welches, wie auch aus Fig. 7 ersichtlich ist, mit einer zentrischen Ausnehmung 17 versehen ist, um die Schraube 15 durchführen zu können.In the Montageausnehmungen 8 each hat-shaped or cup-shaped support member 9 is inserted, which, as well as from Fig. 7 can be seen, is provided with a central recess 17 in order to perform the screw 15 can.

Die Fig. 4 zeigt weiterhin, dass ein Rand 10 des Abdeckkörpers 7 profiliert oder umgebogen ist, um einen dichten festen Sitz in dem Ringraum 5 zu gewährleisten. In ähnlicher Weise ist ein Randbereich 11 des Stützelements 9 umgebogen oder profiliert, um den Abdeckkörper 7 zu halten und vorzuspannen. Zu diesem Zweck ist die Länge des Stützelements 9 geringfügig kleiner als die verfügbare Tiefe im Ringraum 5, so dass sich bei Anziehen der Schraube 15 eine entsprechende Verspannung des Abdeckkörpers 7 ergibt.The Fig. 4 further shows that an edge 10 of the cover body 7 is profiled or bent to ensure a tight tight fit in the annulus 5. Similarly, an edge portion 11 of the support member 9 is bent or profiled to hold the cover body 7 and bias. For this purpose, the length of the support element 9 is slightly smaller than the available depth in the annular space 5, so that when tightening the screw 15, a corresponding tension of the cover body 7 results.

Die Fig. 6 zeigt in perspektivischer Teilansicht den ringförmigen Abdeckkörper 7, während bei der Darstellung der Fig. 5 in schematischer Weise die einzelnen Stützelemente 9 zusätzlich zu dem Abdeckkörper 7 gezeigt sind.The Fig. 6 shows in a perspective partial view of the annular cover body 7, while in the illustration of Fig. 5 in a schematic way, the individual support elements 9 are shown in addition to the cover body 7.

Es versteht sich, dass bei der Darstellung der Fig. 4 auch in der linken Hälfte der Darstellung ein entsprechender Abdeckkörper 7 in den vorderen Grundkörper 3 mit Hilfe entsprechender Stützelemente 9 einsetzbar ist. Auf eine zeichnerische Darstellung wurde aus Gründen der Vereinfachung der Darstellung verzichtet.It is understood that in the presentation of the Fig. 4 Also in the left half of the illustration, a corresponding cover body 7 in the front body 3 by means of appropriate support elements 9 is used. A graphic representation was omitted for reasons of simplification of the presentation.

Die Erfindung ist nicht auf das gezeigt Ausführungsbeispiel beschränkt, vielmehr ergeben sich im Rahmen der Erfindung vielfältige Abwandlungs- und Modifikationsmöglichkeiten.The invention is not limited to the embodiment shown, but rather arise within the scope of the invention varied modification and modification options.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Schaufelfußblade
22
Statorschaufelstator
33
Vorderer GrundkörperFront body
44
Hinterer GrundkörperRear body
55
Ringraumannulus
66
Montagebohrungmounting hole
77
Abdeckkörpercovering
88th
Montageausnehmungmounting recess
99
Stützelementsupport element
1010
Randedge
1111
Randbereichborder area
1212
Gummifüllungrubber infill
1313
BuchseRifle
1414
Ausnehmungrecess
1515
Schraubescrew
1616
Muttermother
1717
Ausnehmungrecess

Claims (11)

  1. Shroud for the support of vane roots (1) of variable stator vanes (2) in the high-pressure compressor of a gas turbine including a forward annular shroud segment (3) and a rearward annular shroud segment (4), each with an axially open annulus (5) for the formation of an essentially U-shaped cross-section and with a plurality of axial assembly holes (6), characterized in that an annular cover (7) is arranged in the opening area of the annulus (5) which is provided with assembly recesses (8) and in that a tubular support (9) is provided in the area between the assembly recesses (8) of the annular cover (7) and the associated assembly holes (6) of the forward and rearward annular shroud segments (3, 4).
  2. Shroud in accordance with Claim 1, characterized in that the cover (7) is designed essentially in the form of a flat ring.
  3. Shroud in accordance with Claim 1 or 2, characterized in that the cover (7) is made of sheet metal.
  4. Shroud in accordance with one of the Claims 1 to 3, characterized in that the cover (7) is profiled at least at its rims (10).
  5. Shroud in accordance with one of the Claims 1 to 4, characterized in that the support (9) is cup-shaped or hat-shaped.
  6. Shroud in accordance with Claim 5, characterized in that the free rim area of the support (9) is profiled for the retention of the cover (7).
  7. Shroud in accordance with one of the Claims 1 to 6, characterized in that the cover (7) and the support (9) are individual parts.
  8. Shroud in accordance with one of the Claims 1 to 6, characterized in that the cover (7) and the support (9) form one part.
  9. Shroud in accordance with one of the Claims 1 to 8, characterized in that the height of the support (9) is smaller than the depth of the annulus (5).
  10. Shroud in accordance with one of the Claims 1 to 9, characterized in that the cover (7) and the support (9) are made of metal.
  11. Shroud in accordance with one of the Claims 1 to 9, characterized in that the cover (7) and the support (9) are made of plastic material.
EP02023209A 2001-12-13 2002-10-16 Shroude for retaining blade shafts of adjustable stator vanes in a high pressure compressor of a gas turbine Expired - Fee Related EP1319844B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10161292A DE10161292A1 (en) 2001-12-13 2001-12-13 Bearing ring for the storage of blade roots of adjustable stator blades in the high pressure compressor of a gas turbine
DE10161292 2001-12-13

Publications (2)

Publication Number Publication Date
EP1319844A1 EP1319844A1 (en) 2003-06-18
EP1319844B1 true EP1319844B1 (en) 2009-12-02

Family

ID=7709105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02023209A Expired - Fee Related EP1319844B1 (en) 2001-12-13 2002-10-16 Shroude for retaining blade shafts of adjustable stator vanes in a high pressure compressor of a gas turbine

Country Status (3)

Country Link
US (1) US6790000B2 (en)
EP (1) EP1319844B1 (en)
DE (2) DE10161292A1 (en)

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EP2955335A1 (en) 2014-03-31 2015-12-16 MTU Aero Engines GmbH Guide blade assembly, guide blade, inner ring and fluid flow engine
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EP3176386A1 (en) 2015-12-04 2017-06-07 MTU Aero Engines GmbH Inner shroud assembly, corresponding intermediate shroud, inner casing and turbomachine
US10494942B2 (en) 2015-12-04 2019-12-03 MTU Aero Engines AG Inner ring system for an inlet guide vane cascade of a turbomachine

Also Published As

Publication number Publication date
DE10161292A1 (en) 2003-06-26
US6790000B2 (en) 2004-09-14
US20030113204A1 (en) 2003-06-19
DE50214035D1 (en) 2010-01-14
EP1319844A1 (en) 2003-06-18

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