EP2030719B1 - Procédé et dispositif destinés au traitement des pointes d'aubes des tambours d'une roue de rotor de turbomachines - Google Patents

Procédé et dispositif destinés au traitement des pointes d'aubes des tambours d'une roue de rotor de turbomachines Download PDF

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Publication number
EP2030719B1
EP2030719B1 EP08160657.6A EP08160657A EP2030719B1 EP 2030719 B1 EP2030719 B1 EP 2030719B1 EP 08160657 A EP08160657 A EP 08160657A EP 2030719 B1 EP2030719 B1 EP 2030719B1
Authority
EP
European Patent Office
Prior art keywords
machining
accordance
blades
wet
tools
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.)
Ceased
Application number
EP08160657.6A
Other languages
German (de)
English (en)
Other versions
EP2030719A1 (fr
Inventor
Arno Secherling
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
Original Assignee
Rolls Royce Deutschland Ltd and Co KG
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Filing date
Publication date
Application filed by Rolls Royce Deutschland Ltd and Co KG filed Critical Rolls Royce Deutschland Ltd and Co KG
Publication of EP2030719A1 publication Critical patent/EP2030719A1/fr
Application granted granted Critical
Publication of EP2030719B1 publication Critical patent/EP2030719B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
    • 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
    • F01D5/005—Repairing methods or devices
    • 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
    • F05D2230/80—Repairing, retrofitting or upgrading methods
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/37—Impeller making apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making
    • Y10T29/49325—Shaping integrally bladed rotor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49336—Blade making

Definitions

  • the invention relates to a method for blade tip machining of running with integrally molded and / or separately mounted conventional blading impeller drums of turbomachinery with rotating impeller drum and an apparatus for performing the method.
  • Impellers of turbomachinery compressors or rotor drums formed by a plurality of interconnected impellers with vanes held in a groove on the disk periphery are known to be ground dry at the blade tips by high speed grinding in which the drum rotates at high speed. Similar to the rotational movement in the installed state in the turbomachine, the blades held in the groove are pressed outward due to the centrifugal force, so that the blade tips can be ground to the smallest possible gap distance to the housing, which is also effective for achieving a high efficiency and a low surge limit should be present in practical operation.
  • the blade tip grinding of the high-speed rotating drum with conventionally mounted blading also has the advantage that the blades are elastically supported during machining due to the centrifugal force acting on them and are thus not loaded too high.
  • BLISK integrally manufactured wheels
  • the invention is therefore an object of the invention to provide a method for tip machining of integrally molded and / or separately mounted blading compressor drums of turbomachinery, which prevents damage to the blades during grinding and setting an optimal blade tip distance to the housing and thus to achieve a high Compressor efficiency and a high surge limit guaranteed.
  • the basic idea of the invention is the machining of the completely assembled impeller drum (compressor drum) in a single device in which the rotating workpiece carrier, such as the turbomachine shaft on which the impeller drum is later mounted, is formed and the impeller drum is also correspondingly connected to the thus formed workpiece carrier is.
  • the machining of integrally molded blades is liquid-fed at a speed which may be less than the dry-working speed of the conventionally-formed blades.
  • the area for dry machining conventional blades is shielded from the wet and liquid chips produced by wet machining by an adjustable separator.
  • impeller drums having integrally molded and / or conventionally formed blades on the blade tips can be used machined in high accuracy and without damaging the integrally molded or adjacent these conventionally formed blades. Due to the machining of both integrally and conventionally bladed drums in one piece and in one and the same machine tool Minimal tolerances are achieved with respect to the outer diameter of the impeller drum and thus optimum gap ratios and improved efficiency of the turbomachine.
  • grinding wheels are provided with a liquid supply for the wet grinding of the drums or drum parts with integrally molded blades and grinding wheels for the dry grinding of drums or drum parts with conventional blading.
  • milling tools for example, milling tools or other tools for blade tip machining can be arranged.
  • the respective tool holders are associated with tool magazines for rapid tool change, for example for the machining of blades made of different materials.
  • the device may comprise brushing tools or other tools.
  • the existing titanium first drum 1 comprises four discs in blisk construction, that is with one piece a disc 2 formed blade rings or blades 3 formed Blisks 4, which are joined together by welding.
  • the second drum 5 - here made of a nickel-based material - comprises two welded together, but conventionally manufactured wheels 6, consisting of a disc 7, on the outer circumference in a groove separately manufactured blades 8 are held.
  • the two drums 1 and 5 are joined together via connecting means 9 into a single drum assembly (impeller drum).
  • the thus formed impeller drum 10 is by means of first and second releasable connecting elements 11, 12 at the front and rear ends in a rotatably mounted workpiece carrier 13 (13a / 13b) (auxiliary power shaft, dummy shaft) involved, corresponding to a portion of the engine to drive the impeller drum 10 actually provided engine shaft is formed.
  • a rotatably mounted workpiece carrier 13 13a / 13b
  • auxiliary power shaft, dummy shaft auxiliary power shaft, dummy shaft
  • the device for blade tip machining the impeller drum 10 includes a first, suitable for wet and dry operation machining tool 15 with this associated tool magazine 16 for exchanging the designed here as a grinding wheel tool and an adjustable liquid supply 17, and a second processing tool 18, which is also associated with a tool magazine 16 for the replacement of the tools and an adjustable liquid supply 17 for the optional wet or dry grinding operation.
  • a first, suitable for wet and dry operation machining tool 15 with this associated tool magazine 16 for exchanging the designed here as a grinding wheel tool and an adjustable liquid supply 17, and a second processing tool 18, which is also associated with a tool magazine 16 for the replacement of the tools and an adjustable liquid supply 17 for the optional wet or dry grinding operation.
  • the grinding wheels may be provided.
  • the blade tip processing device shown in the drawing further comprises a movable in the axial direction, here between the adjacent blade rings of a blisk 4 and a conventional impeller 6 arranged, designed as an annular disc separating element 19 whose inner diameter is adapted to the respective drum diameter.
  • the machining of the blade tips of the previously prepared first drum 1 with integrally molded blades 3 and the second drum 5 with conventionally mounted blades 8 is carried out in such a way that in a first step, the first drum 1 and the second drum 5 by means of the connecting means 9 to a assembled, the impeller drum 10 forming assembly are screwed.
  • This assembly is then connected by means of the first and second connecting means 11, 12 at the front and rear side with the front ends of the two portions 13a, 13b of the rotatably mounted and to a drive means (not shown) coupled to the workpiece carrier 13.
  • the partition member 19 is positioned between the blisk-assembled first drum 1 and the conventionally-formed second drum 5.
  • damping elements 20 for further damping of the vibration of the integrally formed blades during wet grinding and splash guard elements can also be attached.
  • the machining of the blade tips of the second drum 5 is carried out by high-speed grinding by the tool carrier 13 rotates at high speed and pressed the blades 8 due to the centrifugal force to the outside of the second processing tool 18 and - if necessary, elastically mounted - at the blade tips are ground, dry, that is with interrupted liquid supply 17b. Subsequently, the machining tool 18 is moved over the adjacent blade ring to - if necessary after a tool change - also to grind these blades 8 in the manner described above.
  • the subsequent processing of the integral and thus rigidly connected to the first drum 1 blades 3 is performed as a wet grinding, that is, with free liquid supply and consequent vibration reduction, and with respect to the high-speed grinding reduced speed successively at the blade tips of the four blisks 4 welded together. Due to the reduced rotational speed of the workpiece holder and in conjunction with the lubrication effect caused by the liquid supply, the vibration of the otherwise highly vibrating blades 3 is significantly reduced, so that the risk of damage to the blades caused by strong vibrations due to cracking no longer exists. The reduced vibrations and the cooling effect of the liquid also prevent the formation of sparks and thus the damage of adjacent blades by flying sparks.
  • damping elements 20 and splash guard elements may be attached to these blades 3.
  • the separator 19 shields the second drum 5 and its conventionally held in a groove blades 8 relative to the wet grinding of the blisks 4 resulting wet grinding sludge, which could settle in the grooves, and also against harmful, possibly made of a different material sparks.
  • brushing tools 21 or other tools are arranged in the device. With the previously described method and the corresponding device or machine tool The blade tips of the one-piece and arranged according to the conditions in the turbomachine compressor drum are machined so that an optimal tip distance to the housing and thus a high efficiency and a high surge limit can be achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Claims (12)

  1. Procédé destiné à l'usinage des bouts d'aube des tambours de rotor de turbomachines réalisés avec aubage façonné monobloc et/ou conventionnel monté séparément, le tambour de rotor étant en rotation, caractérisé en ce qu'un tambour de rotor entièrement monté est serré dans un arbre auxiliaire de turbomachine faisant office de support de pièce d'oeuvre et que les aubes sont usinées en fonction de l'état de montage du tambour de rotor présent dans la turbomachine, sachant qu'est effectué un usinage par voie humide des aubes façonnées monobloc avec une vitesse de rotation réduite par rapport à celle de l'usinage à sec d'aubes disposées de manière conventionnelle, et qu'une zone d'usinage à sec est protégée contre les copeaux et substances liquides produits dans la zone d'usinage par voie humide, et que différents outils sont respectivement utilisés en fonction du type d'usinage et de matériau.
  2. Procédé selon la revendication n° 1, caractérisé en ce que les bouts d'aube sont usinés par rectification à arrosage et à sec.
  3. Procédé selon la revendication n° 2, caractérisé en ce que les bouts d'aube sont mécaniquement réusinés par brossage.
  4. Dispositif destiné à réaliser le procédé selon la revendication n° 1, caractérisé par un support de pièce d'oeuvre (13) conçu comme un arbre d'entraînement de turbomachine, auquel est relié le tambour de rotor (10) comme dans la turbomachine, un premier outil d'usinage (15) avec amenée de liquide réglable pour l'usinage par voie humide des aubes (3) façonnées monobloc, et un deuxième outil d'usinage (18) avec amenée de liquide réglable pour l'usinage à sec des aubes fixées de manière conventionnelle (8), ainsi qu'un élément séparateur (19) conçu en tant que disque annulaire pour isoler une zone d'usinage à sec d'une zone d'usinage par voie humide.
  5. Dispositif selon la revendication n° 4, caractérisé en ce que chaque zone d'usinage par voie humide ou à sec est déterminée par ouverture/ fermeture de l'amenée de liquide et l'outil d'usinage - interchangeable - respectif (15 ou 18) ainsi que par le positionnement de l'élément séparateur (19).
  6. Dispositif selon la revendication n° 5, caractérisé en ce qu'aux outils d'usinage (15, 18) sont associés des magasins à outils (16) pour permettre le changement d'outil en fonction du type de matériau.
  7. Dispositif selon la revendication n° 4, caractérisé en ce que les outils d'usinage (15, 18) sont des meules réglables radialement et axialement avec amenée de liquide (17) associée - réglable et activable à volonté.
  8. Dispositif selon la revendication n° 7, caractérisé en ce qu'en plus des meules sont prévus des outils de fraisage ou d'autres outils utilisables à titre d'alternative pour l'usinage des bouts d'aube.
  9. Dispositif selon la revendication n° 4, caractérisé en ce que l'élément séparateur (19) est réglable axialement et adaptable radialement.
  10. Dispositif selon la revendication n° 7 ou n° 8, caractérisé en ce qu'aux outils d'usinage (15, 18) sont associés des outils de brossage (21) ou d'autres outils pour réusiner les bouts d'aube meulés.
  11. Dispositif selon la revendication n° 4, caractérisé en ce que les aubes (3) façonnées monobloc usinées dans la zone d'usinage par voie humide sont supportées par des éléments amortisseurs (20) et/ ou protégées contre le cambouis de meulage et la formation d'étincelles.
  12. Dispositif selon la revendication n° 4, caractérisé en ce que pour relier le tambour de rotor (10) au support de pièce d'oeuvre (13) sont prévus les moyens de liaison (11, 12) usuels entre tambour de rotor et arbre d'entraînement dans la turbomachine.
EP08160657.6A 2007-08-30 2008-07-17 Procédé et dispositif destinés au traitement des pointes d'aubes des tambours d'une roue de rotor de turbomachines Ceased EP2030719B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007041805A DE102007041805A1 (de) 2007-08-30 2007-08-30 Verfahren und Vorrichtung zur Schaufelspitzenbearbeitung der Laufradtrommeln von Turbomaschinen

Publications (2)

Publication Number Publication Date
EP2030719A1 EP2030719A1 (fr) 2009-03-04
EP2030719B1 true EP2030719B1 (fr) 2014-10-29

Family

ID=40032851

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Application Number Title Priority Date Filing Date
EP08160657.6A Ceased EP2030719B1 (fr) 2007-08-30 2008-07-17 Procédé et dispositif destinés au traitement des pointes d'aubes des tambours d'une roue de rotor de turbomachines

Country Status (3)

Country Link
US (1) US8353105B2 (fr)
EP (1) EP2030719B1 (fr)
DE (1) DE102007041805A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009004791A1 (de) * 2009-01-13 2010-07-15 Rolls-Royce Deutschland Ltd & Co Kg Verfahren zur Herstellung der Schaufelspitzen von in BLISK-Bauweise gefertigten Laufrädern
GB2491398B (en) 2011-06-03 2013-11-27 Rolls Royce Plc An apparatus and a method of shaping an edge of an aerofoil
US10018061B2 (en) 2013-03-12 2018-07-10 United Technologies Corporation Vane tip machining fixture assembly
ES2607112T3 (es) 2013-10-24 2017-03-29 Siemens Aktiengesellschaft Procedimiento para acortar los álabes móviles de una turbomáquina
DE102014219050A1 (de) 2014-09-22 2016-03-24 Rolls-Royce Deutschland Ltd & Co Kg Verfahren und Vorrichtung zum Bearbeiten von Schaufelspitzen eines Verdichterrotors einer Gasturbine
EP3415276B1 (fr) * 2016-02-09 2023-03-15 IHI Corporation Procédé de meulage de l'extrémité d'une pale de rotor et dispositif de support pour le meulage de l'extrémité d'une blisk
DE102016114938A1 (de) * 2016-08-11 2018-02-15 Elb-Schliff Werkzeugmaschinen Gmbh Verfahren zum spanenden Bearbeiten von Werkstücken mittels einer Schleifmaschine sowie Schleifmaschine
DE102019102480B4 (de) * 2019-01-31 2023-10-19 Rolls-Royce Deutschland Ltd & Co Kg Schutzvorrichtung zum Schutz der Laufschaufeln eines Verdichters vor Funken und/oder Partikeln bei einer Bearbeitung der Schaufelspitzen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3402066A1 (de) * 1984-01-21 1985-08-01 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zur aussendurchmesserfeinbearbeitung von laufradschaufeln
GB2270485A (en) * 1992-09-09 1994-03-16 Butler Newall Ltd Grinding blade tips of turbine/compressor rotors
US5704826A (en) * 1995-10-18 1998-01-06 Danobat, S. Coop. Ltda. Machine for grinding rotor blades provided with a multiwheel head
DE19711337B4 (de) * 1997-03-18 2004-07-15 ETN Präzisionstechnik GmbH Spannvorrichtung zum Spitzenschleifen für in einem Maschinengehäuse eingebaute Statorschaufeln einer Axial-Strömungsmaschine
ES2199052B1 (es) * 2002-03-26 2005-02-01 Danobat, S. Coop. Maquina rectificadora de un rotor, con un cabezal rotatorio de dos muelas.

Also Published As

Publication number Publication date
EP2030719A1 (fr) 2009-03-04
DE102007041805A1 (de) 2009-03-05
US20090113683A1 (en) 2009-05-07
US8353105B2 (en) 2013-01-15

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