EP2075721B1 - Auswahlverfahren für die Anordnung von Sektoren eines Leitkranzes für Turbomaschinen - Google Patents

Auswahlverfahren für die Anordnung von Sektoren eines Leitkranzes für Turbomaschinen Download PDF

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Publication number
EP2075721B1
EP2075721B1 EP08172427.0A EP08172427A EP2075721B1 EP 2075721 B1 EP2075721 B1 EP 2075721B1 EP 08172427 A EP08172427 A EP 08172427A EP 2075721 B1 EP2075721 B1 EP 2075721B1
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EP
European Patent Office
Prior art keywords
sectors
arrangement
sector
selecting
distributor
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EP08172427.0A
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English (en)
French (fr)
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EP2075721A1 (de
Inventor
Justine Menuey
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.)
Safran Aircraft Engines SAS
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Safran Aircraft Engines SAS
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Publication of EP2075721A1 publication Critical patent/EP2075721A1/de
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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
    • 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
    • F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
    • 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
    • F01D25/246—Fastening of diaphragms or stator-rings
    • 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
    • F01D5/12—Blades
    • F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
    • F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods

Definitions

  • the present invention relates to a method for selecting a sector arrangement for a turbomachine distributor.
  • a sector is a known part, comprising one or more blades connecting two platforms.
  • the crowning of sectors is, for the most part, the distributor.
  • each sector is positioned or puts itself in relative mounting position with respect to the two sectors located on either side, by abutting the contact surfaces of its platforms with those of the platforms of the adjacent sectors.
  • US6393331 discloses a method for designing an outer air seal for turbine blades. The method uses a software product model to generate a three-dimensional parametric geometric model of said seal.
  • EP1113373 discloses an optimized design method for an air conditioning system on a vehicle. The method allows flexibility in vehicle design and technical analysis of said design. Various computer tools are integrated, including the solid model, parametric design, automated studies and a library.
  • EP0716219 discloses a sectorized monobloc distributor of a turbomachine turbine stator.
  • EP1737713 describes a method for assembling a streamlined turbine blade.
  • US2006 / 0013692 describes a method for ordering vanes of a paddle wheel. With the aid of a software product, the method consists of determining a geometric parameter of each blade and determining a mapping order of said blades.
  • the object of the present invention is to define a method of choosing a sector arrangement for a turbomachine distributor according to claim 1.
  • a sector arrangement for a turbomachine distributor designates the ordered sequence of the individual references of these assembled sectors in relative mounting position, that is to say in crown, to form a distributor.
  • two arrangements are distinguished when the positions of the sectors inside the distributor are not the same, for example if the sectors have undergone a permutation.
  • an arrangement of sectors may refer to the ordered sequence of individual references of a set of sectors that do not constitute an entire distributor but only a part of it.
  • the database formed in step A. contains a plurality of sector models, i.e. a collection of sector models, these models being broadly identical because they all represent sectors intended for a given sector. same distributor, but have secondary differences because they come from the digitization of different sectors. It is the existence of these differences that makes the whole point of choosing one arrangement rather than another.
  • the method of choosing a sector arrangement presented above makes it possible to optimize the choice of sectors and their relative positions in a distributor during the constitution of the distributor. As a result, a distributor with increased performance and increased service life is achieved.
  • the use of a database of three-dimensional numerical models of distributor allows the control and the follow-up in time of a large number of geometrical characteristics of the sectors of the distributor.
  • digitization here denotes any method of recording three-dimensional coordinates on the part, whether by mechanical means using a touch point, or by optical means using a laser scanner or with structured light projection for example. In all cases, digitization involves the recording of a large number of three-dimensional coordinates, so as to obtain a "cloud of points", which makes it possible in particular to present on a computer screen the numerical model obtained in the form of mesh. .
  • each sector of distributor is measured in general disassembled, independently of the other sectors and without relative positioning with respect thereto (which does not however, it does not prevent the use of means for securing or maintaining the sector during the measurement).
  • a dispenser sector is a complex shaped part, having many left surfaces, and whose normal directions are directed in all directions of space.
  • the second family of surfaces whose digitization is necessary for the virtual editing of the sectors performed in step C. is that of the reference surfaces necessary for virtual editing. These reference surfaces are oriented completely differently from the surfaces to be measured. This results in an additional difficulty of measurement.
  • the accuracy that the digitization operation must have is important. Indeed, the admitted measurement uncertainty does not exceed the hundredth or even a few hundredths of a millimeter.
  • the database constituted in the context of the method according to the invention consists of numerical models which make it possible to measure a large number of dimensions of the distributor sector and to verify their actual values with respect to their specified and toleranced values on the plan.
  • the database thus allows powerful traceability operations.
  • the choice criterion set in step B) can take different values depending on the constraints considered most important for the optimization of the distributor. It is thus possible, for example, to seek to make the passage sections as close as possible to each other in the distributor, regardless of their respective dimensions; or any other criterion depending on geometries and relative positions in the arrangement of different sectors.
  • the method can be applied by evaluating a larger or smaller number of arrangements. If a large computing power is available, it is possible to test all the combinations of sectors of the database.
  • step C an evaluated arrangement is the combination of an arrangement chosen by the method and another sector or another arrangement chosen using the method.
  • the dispenser mounting algorithm is thus a recursive algorithm: the arrangement of the sectors comprising the distributor is gradually defined, optimizing at each step the addition of a new distributor sector with respect to the existing arrangement.
  • the computing power consumed is much lower than in the previous case.
  • the database of three-dimensional models of distributor sectors can be used either to optimize the assembly of a single distributor or to optimize a fleet of distributor sectors making it possible to compose several distributors.
  • the database used for the method may contain sectors coming from a single distributor, or sectors from at least two different distributors.
  • the method comprises an important step, in particular from the point of view of the measurement accuracy, which is that of the virtual assembly in assembled positions, of the numerical models of the sectors of the evaluated arrangement.
  • virtual editing here we mean the determination of the different three-dimensional reference changes, to be applied respectively to the three-dimensional numerical models of the sectors, to place these in mutual mutual mounting position, in a virtual space. in reference).
  • the registration is thus done digitally, on a computer, between the numerical models of the different sectors of the evaluated arrangement.
  • the virtual editing step C the virtual editing of the digital models of the distributor areas of an evaluated arrangement is done in the following manner. As has been written, the distributor sectors have contact surfaces, and are placed in relative position with respect to the adjacent distributor sectors by abutment of these contact surfaces.
  • the numerical models of the sectors comprise a modeling of the contact surfaces involved in their relative positioning position; and in step C the virtual editing of the numerical models of the sectors in an evaluated arrangement is made by mapping the contact surfaces of the adjacent sectors of said arrangement.
  • the digital registration thus follows the same rules, and thus provides the same results, as the real registration that could be achieved between the different distributor sectors of the evaluated arrangement.
  • the digitization step A. is carried out using a non-contact optical measurement means.
  • the use of non-contact measurement or optical measurement is particularly advantageous in the case of distributor sectors because it avoids any scratching of these parts and any degradation of the surface thereof.
  • the creation of numerical models of the sectors, by digitalization is automated.
  • This result can be obtained in particular by embedding the digitalization sensor, like a 3D scanner with structured light projection, at the end of the arm of a robot.
  • the digitalization sensor like a 3D scanner with structured light projection
  • the arm of the robot travels a predetermined trajectory, including a certain number of stopping positions.
  • the digitizing sensor performs a data acquisition.
  • the different acquisitions made at the different stopping positions are recalibrated with reference to the others automatically, by a calculator, so as to constitute the three-dimensional numerical model of the digitized sector.
  • Digitization in automatic mode of a set of sectors can be done using a conveyor which places successively in front of the robotic arm carrying the digitization sensor, the different sectors to digitize.
  • the steps of determining a set of arrangements to be evaluated, virtual editing of the sectors of an evaluated arrangement, and / or determining the values of the selection criterion for the different evaluated arrangements are automated.
  • a computer software used to perform the step C. of resetting and determining the passage sections is indeed programmed to perform these operations in sequence, without human intervention.
  • the result obtained is a control report indicating the optimal arrangement and the criterion value of choice for this arrangement.
  • the advantages of automation are a saving of time, a reduction of operating errors, a reduction of labor time, and an increase in the reproducibility of the results, and ultimately a better accuracy of the measurement process.
  • the selection criterion is a function of the respective passage sections of the distributor sectors.
  • the overall performance depends in fact in particular the passage sections of the distributor, that is to say, the sum of the passage sections of the different sectors. The measurement of these passage sections is therefore an important operation.
  • the passage sections are the areas, measured perpendicularly to the flow direction, of the flow passing through the distributor sector.
  • the passage sections can also more simply designate the passage widths of the flow through the distributor sector, measured in a perpendicular to the axis of the blades.
  • passage sections will be considered in their exact sense, that is to say flow passage sections that are areas. More generally, it will be understood that the present invention also aims at the case where the flow passage sections are only the passage widths of the flow as has been said previously.
  • the internal passage sections concerning only distributor sectors each having at least two vanes, are measured between adjacent vanes in pairs of the sector considered.
  • the external passage sections are each half of the area formed between an end blade of the sector and the adjacent blade sector vis-à-vis in the distributor.
  • the area between the end vane of the distributor sector and the adjacent vane must be determined with an adjacent vane that would be at the nominal dimensions; the nominal passage section at this end of the distributor sector is then obtained.
  • a theoretical numerical model of a reference blade is also used.
  • theoretical numerical model is meant here a model that has been generated by computer, typically using computer-aided design software (CAD); as opposed to a model resulting from digitization.
  • CAD computer-aided design software
  • the sectoral arrangement does not constitute a complete distributor, but only a part of it, the question arises, in the case where the criterion of choice concerns the sections of passage of the sectors, the measurement of passage sections of the two sectors at the ends of the arrangement.
  • the numerical models of two reference vanes are then used. During the virtual assembly of the sectors, these vanes are positioned in relative mounting position at the ends of the arrangement. It is then possible to calculate the sections of passage of all the sectors, and thus to lead the process of choosing an arrangement to completion.
  • the sector of distributor 100 visible in figure 1 has two platforms 130, 140, substantially parallel. These platforms are substantially cylindrical in shape around the axis of the dispenser. These platforms 130, 140 comprise contact surfaces 131, 132, 141, 142, respectively directed towards the two sectors of distributors arranged on either side of the sector 100 measured (relative mounting position). The contact surfaces are designed to maintain the adjacent distributor sectors 200 and 300 in the relative position of contact. These lateral sectors 200, 300 respectively comprise two end vanes 220 and 310, which are arranged opposite the vanes. end of the sector 100 in the relative mounting position of the sectors.
  • the distributor sector 100 further comprises two blades 110, 120. Each of these blades has an aerodynamic profile and comprises a lower surface 111, 121, and an extrados 112, 122. As there are only two blades in the sector 100 , each of the vanes 110, 120 is a dawn end. Thus, each of these vanes is caused to be disposed vis-a-vis with an end vane of the adjacent distributor sector, in relative mounting position. More specifically, the intrados 111 is vis-à-vis the extrados 222 of the blade 220, and the extrados 122 is vis-à-vis the lower surface 311 of the blade 310.
  • inter-blade passages 101, 102, 103 Between the respective blades are formed inter-blade passages 101, 102, 103.
  • the passage 102 is formed between the blades 110, 120 of the sector 100.
  • the inter-blade passages 101 and 103 are formed between, a a dawn (110 or 120) of the sector, and secondly the reference dawn vis-a-vis, 220 or 310.
  • the selection criterion chosen for an arrangement is a function of the passage sections in each sector. For this reason, before detailing the method according to the invention, the mode of determining the passage sections of a distributor sector will now be presented.
  • the passage sections are presented in relation to the figure 2 .
  • This section shows the sections of the various blades 220, 110, 120, 310; the mating contact surfaces 242, 141, 142, 341; and the inter-blade channels 101, 102, 103.
  • the nominal shape of the different channels is substantially the same.
  • the distance between the vanes fluctuates as a function of the position in the channel. There is usually only one plane for which this distance is minimal. As the distance between the platforms 130, 140 is substantially constant, it is also in this plane that the passage section between the blades is minimal, for a given inter-blade channel.
  • This plane of the channel corresponds respectively to the planes P1, P2, P3 for the channels 101, 102, 103; the distance between the blades in these sections is respectively D1, D2, D3. It will be noted that, advantageously, in the method according to the invention, it is possible to optimize for each inter-blade channel the position of the plane P1, P2, P3 section, thus determining the plane of the inter-blade channel in which the passage section is actually minimal.
  • the figure 3 shows the section of the distributor sector following the plane P1. It shows the geometry of the passage in the inter-blade channel 101.
  • the value of the passage section of interaubes channel 101 can be determined as follows: Firstly, a flow passage section between two adjacent blades is defined as being substantially equal to the minimum flow passage area between them.
  • the passage sections of the sector are, on the one hand, when the sector comprises more than one blade, the flow passage section or sections between the pair or pairs of adjacent blades of the sector (these are the sections). internal passage of the sector); and on the other hand, half of the flow passage sections between an end blade of the sector and the blade of the adjacent sector opposite it (these are the outer passage sections of the sector) .
  • a passage section of the flow between two adjacent blades is determined based on the smallest distance between them.
  • the smaller distances between adjacent vanes, in the three inter-vane channels 101, 102, 103 shown in FIG. figure 2 are the distances D1, D2, D3.
  • a passage section can be defined not by a passage area, but by a passage width for the flow.
  • the distance D2 (for an internal section of the sector), the halves of the distances D1 and D3 (for the external sector passage sections) can be considered as the passage sections of the distributor sector.
  • a passage section of the flow between two adjacent blades is equal to the area of the free space section between the two blades, in the plane substantially parallel to the axis of the blades and in which the distance between the blades is the weakest.
  • FIG. 3 This section is illustrated on the figure 3 , for the inter-blade channel 101.
  • the figure 3 represents in fact a section of the distributor sectors 100 and 200, in relative mounting position. This cut is made in the plane P1 of lesser distance between the adjacent blades 220 and 110, and which appears in figure 2 . It will be noted that the digitalisation of the blades of the sectors 100 and 200 makes it possible to obtain the real cross-section of the passage 101 and to know the real positions of the four walls 111, 222, 135-235, 145-245 delimiting the sector, represented on the figure 3 .
  • the area of the part of the plane P1 located between these four walls can be calculated or determined. This determination can be done in several ways, more or less approximate.
  • the distance between the platforms 130-230 and 140-240 being in first approximation constant (these platforms being substantially of cylindrical and coaxial shapes), the value of the passage section S 101 in the inter-blade channel 101 between the two adjacent blades 220 and 110, is the product of the smallest distance between the blades, D1, by the distance H between the platforms.
  • the method previously indicated is to measure the actual distance H between the two walls 135-235 and 145-245 of the platforms 130 and 140, and to multiply it by the distance D1 between the walls 111 and 222 of the adjacent blades 110 and 220.
  • the database of three-dimensional digital models of a number of sectors is digitized.
  • each of the distributor sectors is digitized alone (or at least, without specifically being in relative mounting position relative to the reference vanes). Its digitalization makes it possible to obtain its three-dimensional numerical model. As the dispenser sector is digitized alone, it is easier to obtain a complete model of the sector, that is to say including all of its external surfaces.
  • the digital model obtained by digitization involves digitizing the contact surfaces of the distributor sector. These contact surfaces are the surfaces 131,132,141,142 which serve to maintain the sector relative to the adjacent sectors in relative mounting position.
  • the numerical models of the reference vanes are also obtained.
  • its model contains the mounting surfaces of the sector that includes the dawn.
  • These models can for example be an extract from the three-dimensional digital model of the distributor (or only the sector).
  • the database of the different sectors is then created, including the reference vanes.
  • Each three-dimensional model comprises the representation of its contact surfaces, thus allowing the registration of the sector in relation to to adjacent areas.
  • a selection criterion is set to evaluate the quality of a given sector arrangement, and a preferred value is chosen for this criterion.
  • This criterion is a function of the passage sections of the sectors in relative position of assembly in the arrangement.
  • Criterion ⁇ arrangement S i - S 0 2 where S i is the passage section of the sector i and S 0 the nominal passage section of a sector, and the sum relates to all sectors of the arrangement considered. (Other choices for the criterion are of course possible).
  • the preferred value for this criterion is zero.
  • sectors 1 to 100 all the sectoral arrangements making it possible to constitute a distributor part are envisaged.
  • Each arrangement is presented as following individual references of the sectors of the arrangement, ordered according to the positions I to XI and for example one of the arrangements is the following: (28-4-90-80-54-43-91-3 -11-35-66), in which for example sector No. 28 occupies position I and sector No. 66 position XI.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Claims (9)

  1. Auswahlverfahren für eine Anordnung von Sektoren (100, 200, 300) eines Leitkranzes für Turbomaschinen, wobei die Sektoren des Leitkranzes Kontaktflächen (131, 132, 141, 142) aufweisen und durch Anstoßen dieser Kontaktflächen gegenüber benachbarten Sektoren des Leitkranzes positionierbar sind,
    dadurch gekennzeichnet ist, dass es die folgenden Schritte aufweist:
    A. Erstellen einer Datenbank von dreidimensionalen digitalen Modellen von Sektoren durch Digitalisierung, in der die digitalen Modelle der Sektoren eine Modellierung der Kontaktflächen aufweisen, die an einer relativen Positionierung der Sektoren während der Montage beteiligt sind,
    B. Festsetzen eines Kriteriums zur Auswahl einer Anordnung von Sektoren und eines gewünschten Wertes für dieses Kriterium, wobei das Kriterium von der Geometrie und der relativen Position der Sektoren abhängt,
    C. Bestimmen der relativen Positionen der zusammengefügten Sektoren durch virtuelle Montage für verschiedene bewertete Anordnungen, wobei die virtuelle Montage der digitalen Modelle der Sektoren in einer bewerteten Anordnung dadurch erfolgt, dass die Kontaktflächen benachbarter Sektoren der Anordnung in Übereinstimmung gebracht werden, und Bestimmen des Wertes des Auswahlkriteriums für die bewertete Anordnung in Abhängigkeit von diesen relativen Positionen,
    D. Übernehmen der Anordnung, für die das Auswahlkriterium den Wert aufweist, der dem gewünschten Wert am nächsten kommt.
  2. Auswahlverfahren für eine Anordnung von Sektoren gemäß Anspruch 1, wobei in Schritt C. mindestens eine bewertete Anordnung die Kombination aus einer durch das Verfahren ausgewählten Anordnung und einem anderen Sektor oder einer anderen durch das Verfahren ausgewählten Anordnung darstellt.
  3. Auswahlverfahren für eine Anordnung von Sektoren gemäß Anspruch 1 oder 2, wobei in Schritt A. die für das Verfahren verwendete Datenbank Sektoren (100, 200, 300) von einem einzigen Leitkranz enthält.
  4. Auswahlverfahren für eine Anordnung von Sektoren gemäß Anspruch 1 oder 2, wobei in Schritt A. die für das Verfahren verwendete Datenbank Sektoren von mindestens zwei verschiedenen Leitkränzen enthält.
  5. Auswahlverfahren für eine Anordnung von Sektoren gemäß einem der Ansprüche 1 bis 4, wobei Schritt A) des Erstellens einer Datenbank von digitalen Modellen durch Digitalisierung mit Hilfe eines berührungslosen optischen Messmittels umgesetzt wird.
  6. Auswahlverfahren für eine Anordnung von Sektoren gemäß einem der Ansprüche 1 bis 5, wobei das Auswahlkriterium von den jeweiligen Durchgangsabschnitten (Si) der Sektoren des Leitkranzes abhängt.
  7. Auswahlverfahren für eine Anordnung von Sektoren gemäß Anspruch 6, wobei zum Bestimmen des Durchgangsabschnitts (Si) eines an einem Ende der Anordnung liegenden Sektors ferner ein theoretisches digitales Modell einer Referenzschaufel (220, 310) verwendet wird.
  8. Auswahlverfahren für eine Anordnung von Sektoren gemäß Anspruch 6 oder 7, wobei ein Durchgangsabschnitt (S101, S102, S103) der Strömung zwischen zwei benachbarten Schaufeln im Wesentlichen die minimale Durchgangsfläche der Strömung zwischen ihnen darstellt und die Durchgangsabschnitte (S100/1, S100/2, S100/3) des Leitkranzes einerseits die Hälfte der Durchgangsabschnitte der Strömung (S101, S103) zwischen einer Endschaufel des Sektors und der ihr entsprechenden Referenzschaufel, und andererseits, wenn der Sektor mehr als eine Schaufel aufweist, den oder die Durchgangsabschnitte der Strömung (S102) zwischen dem oder den benachbarten Schaufelpaaren des Sektors darstellen, ein Durchgangsabschnitt der Strömung zwischen zwei benachbarten Schaufeln ist gleich der Fläche des Freiraumabschnitts zwischen den beiden Schaufeln in der Ebene, die im Wesentlichen parallel zur Schaufelachse liegt und in der der Abstand (D1, D2, D3) zwischen den Schaufeln am kleinsten ist.
  9. Auswahlverfahren für eine Anordnung von Sektoren gemäß einem der Ansprüche 6 bis 8, wobei ein Durchgangsabschnitt der Strömung (S101, S102, S103) zwischen zwei benachbarten Schaufeln im Wesentlichen die minimale Durchgangsfläche der Strömung zwischen ihnen darstellt, und die Durchgangsabschnitte (S100/1, S100/2, S100/3) des Leitkranzes einerseits die Hälfte der Durchgangsabschnitte der Strömung (S101, S103) zwischen einer Endschaufel des Sektors und der ihr entsprechenden Referenzschaufel, und andererseits, wenn der Sektor mehr als eine Schaufel aufweist, den oder die Durchgangsabschnitte der Strömung (S102) zwischen dem oder den benachbarten Schaufelpaaren des Sektors darstellen, ein Durchgangsabschnitt der Strömung zwischen zwei benachbarten Schaufeln wird auf der Basis des kürzesten Abstand (D1, D2, D3) zwischen diesen bestimmt.
EP08172427.0A 2007-12-24 2008-12-19 Auswahlverfahren für die Anordnung von Sektoren eines Leitkranzes für Turbomaschinen Active EP2075721B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0760335A FR2925572B1 (fr) 2007-12-24 2007-12-24 Procede de choix d'un arrangement de secteurs pour un distributeur pour turbomachine

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EP2075721A1 EP2075721A1 (de) 2009-07-01
EP2075721B1 true EP2075721B1 (de) 2018-09-12

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US (1) US8140308B2 (de)
EP (1) EP2075721B1 (de)
CN (1) CN101470771B (de)
CA (1) CA2648901C (de)
FR (1) FR2925572B1 (de)
MA (1) MA30566B1 (de)
MX (1) MX2009000246A (de)
SG (2) SG153780A1 (de)

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FR2925677B1 (fr) * 2007-12-24 2010-03-05 Snecma Services Procede de mesure par digitalisation des sections de passage d'un secteur de distributeur pour turbomachine
US10138736B2 (en) * 2012-01-20 2018-11-27 General Electric Company Turbomachine blade tip shroud
US9109455B2 (en) * 2012-01-20 2015-08-18 General Electric Company Turbomachine blade tip shroud
EP2735707B1 (de) * 2012-11-27 2017-04-05 Safran Aero Boosters SA Leitrad einer axialen Turbomaschine mit segmentiertem Innendeckband und zugehöriger Verdichter
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FR2925572B1 (fr) 2010-02-12
US20090164037A1 (en) 2009-06-25
MX2009000246A (es) 2009-06-26
EP2075721A1 (de) 2009-07-01
CN101470771B (zh) 2015-06-03
MA30566B1 (fr) 2009-07-01
SG153780A1 (en) 2009-07-29
CA2648901A1 (fr) 2009-06-24
CA2648901C (fr) 2016-03-08
CN101470771A (zh) 2009-07-01
FR2925572A1 (fr) 2009-06-26
US8140308B2 (en) 2012-03-20
SG172729A1 (en) 2011-07-28

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