WO2009109422A1 - Dispositif de rectification de rainures de fixation servant à loger un aubage d’un système de turbine à gaz et/ou à vapeur - Google Patents

Dispositif de rectification de rainures de fixation servant à loger un aubage d’un système de turbine à gaz et/ou à vapeur Download PDF

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Publication number
WO2009109422A1
WO2009109422A1 PCT/EP2009/050898 EP2009050898W WO2009109422A1 WO 2009109422 A1 WO2009109422 A1 WO 2009109422A1 EP 2009050898 W EP2009050898 W EP 2009050898W WO 2009109422 A1 WO2009109422 A1 WO 2009109422A1
Authority
WO
WIPO (PCT)
Prior art keywords
along
groove
groove depth
axis
roller elements
Prior art date
Application number
PCT/EP2009/050898
Other languages
German (de)
English (en)
Inventor
Torsten Schmidt
Marco Haake
Original Assignee
Alstom Technology Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alstom Technology Ltd. filed Critical Alstom Technology Ltd.
Publication of WO2009109422A1 publication Critical patent/WO2009109422A1/fr

Links

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
    • F01D5/005—Repairing methods or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/28—Grooving workpieces
    • B23C3/30—Milling straight grooves, e.g. keyways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B23P6/002—Repairing turbine components, e.g. moving or stationary blades, rotors
    • 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
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2220/00—Details of milling processes
    • B23C2220/36—Production of grooves
    • B23C2220/366—Turbine blade grooves
    • 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
    • F05D2230/10—Manufacture by removing material

Definitions

  • the invention relates to a device for reworking mounting grooves, which serve to receive blading in a gas and / or steam turbine plant and each have a along a groove depth in the direction of the groove depth extending groove Tannenbaumprofilartig formed groove contour with a number along the groove depth axis arranged and each pairwise opposite support teeth.
  • the rotor-side attachment of blades within flow rotating machines, in particular of gas or steam turbines, is usually along groove-like recesses, which are provided at the peripheral edge of the rotor, and each have a fir-tree-shaped groove cross-sectional contour can be used in the complementarily contoured blade roots of blades and be firmly locked in this way on the rotor by means of suitable fasteners.
  • suitable fasteners For a better illustration of such fastening grooves, reference is made to the illustration in FIG. 2, which shows two rotor disks (1, 2) arranged axially one behind the other, of which the rotor disk (2) provides bent fir tree grooves (3) at their peripheral edge.
  • a fir tree groove is basically characterized by the fact that the groove profile wavy trained and V-shaped mutually inclined groove side edges, with each raised and recessed side edge profile areas face each other.
  • Tragzacken (4), each of the deepened
  • the invention is therefore based on the object, a device for reworking mounting grooves that serve to receive blading in a gas and / or steam turbine plant and each have a along a groove depth axis extending in the direction of the groove depth Tannenbaumprofilartig trained groove contour with a number along arranged to Nuttiefenachse and in pairs opposite support teeth form such that a simple, that is, fast and economically feasible mounting along a nachzubein mounting groove is made possible.
  • the novel device an exact Nutnachbearbeitung.
  • the device for post-processing should be used flexibly, that is, be suitable both for the post-processing of curved and rectilinear fastening grooves.
  • the solution according to the device for reworking mounting grooves according to the features of the preamble of claim 1 is characterized in that a guide means is provided on the roller elements are movably mounted, so that the roller elements along a Tragzacken- pair are engageable in such a way that the Guide means forcibly guided along the mounting groove and is movably mounted at a fixed distance to the mounting groove.
  • the guide means furthermore provides a receiving and fixing unit for a material-removing tool, by means of which the tool can be fixed with an insertion depth which can be predetermined along the groove depth axis and with an inclination predeterminable relative to the groove depth axis.
  • the solution according to the device can thus independently along a mounting groove by means of the introduced into a pair of support teeth To center roller elements on which the preferably plate-shaped guide means is supported, which in turn represents a mounting platform for the components required for the milling process.
  • the entire device thus moves along a mounting groove, wherein during the longitudinal movement, the material-removing tool can be performed with a predeterminable material removal depth and also a predetermined spatial orientation relative to the mounting groove.
  • at least two roller elements are driven by a motor, whereby the device is able to move along the fastening groove with a constant predeterminable speed. This contributes to the fact that the removal of material occurs uniformly along a carrying tooth.
  • All components required to form the device according to the invention can be reduced in weight and made so small that the handling of the device according to the invention can be carried out manually by a single person. Long-lasting set-up times as well as labor-intensive assembly measures, as is the case with the milling device used hitherto, can be avoided with the device according to the invention.
  • FIG. 3a, b top and bottom view of a guide means
  • FIG. 6 illustration of the components for attachment of the material-removing tool relative to the guide means, as well
  • FIG. 7 overall view of an inventively designed
  • FIG. 1 a the cross-sectional profile of a fir tree-shaped fastening groove is shown with bent groove profile in the axial direction.
  • the fir-tree groove has four supporting serrations 4, which are each arranged in pairs relative to the groove-depth axis NA. If there is a cracking within a Tragzackenkontur, it is important to eliminate cracking by appropriate local material removal to avoid crack propagation.
  • the solution according to the concept provides the use of a material-removing tool, preferably in the form of a high-speed miniature Winkelkopffräsmaschine before, as for example for use in the medical dental field is designed.
  • a material-removing tool preferably in the form of a high-speed miniature Winkelkopffräsmaschine before, as for example for use in the medical dental field is designed.
  • a motor unit 51 a handpiece 52, a Winkelfräskopf 53 and attached thereto a Hartmetallfräswerkmaschinection 6 on.
  • Such a miniaturized milling machine has the advantage that, with suitable positioning, even the narrowest and most remote contour regions within the Christmas tree groove can be processed.
  • FIG. 1 b it can be seen that the milling head 6 of the material-removing tool 5 is in engagement with the carrier tooth contour and generates a targeted material removal 7 there.
  • the milling head of the material-removing tool 5 is to be guided precisely for this purpose relative to the supporting teeth to be machined.
  • the device according to the solution is designed for purposes of exact movement of the material-removing tool 5 along a supporting tooth 4 to be machined.
  • the device according to the invention provides a guide means 8, which is shown in a sloping top view in Figure 3a and in a bottom view in Figure 3b in the form of a possible embodiment.
  • the guide means 8 provides on its underside according to Figure 3b before roller elements 9, which are arranged distributed along a spatial axis R side by side.
  • the guide means 8 provides a plate-like means in the manner of a support plate 10, on the underside of each individual roller element is mounted linearly movable perpendicular to the spatial axis R deflectable.
  • the underside of the support plate 10 provides for each roller element 9 a guide groove 1 1, along which each individual roller element is deflectable.
  • the roller elements 9 are each deflected in pairs along their linearly guided guide groove 11, that is to say the roller elements 9 connected via the connecting webs 12a, 12b, 12c and 12d (see the bottom view according to FIG. 3b). are each together along their guide grooves 1 1 deflected.
  • the roller element pairs can be selectively deflected along their guide grooves in a predetermined position in which they are held by a spindle force.
  • roller elements 9 are inserted into a fir tree-like fastening groove, the roller elements 9 respectively engage with the pair of support teeth lying above, with the roller elements 9 connected to each other in pairs, that is, relative to the axis R shown in FIG. 3 by means of the threaded spindles be moved accordingly.
  • the overall arrangement of all roller elements adapts to the respective course of the mounting groove, that is, all roller elements engage in the support teeth of a mounting groove, regardless of whether the mounting groove is curved or rectilinear , This is also shown in particular with reference to FIGS. 4 a and 4 b shown in a pictogram in FIG. 4.
  • FIG. 4 a and 4 b shown in a pictogram in FIG. 4.
  • FIG. 4 a shows the situation in which the guide means 8 is threaded along a curved fastening groove 3 with its roller elements 9.
  • the individual roller elements 9 come into engagement with the respective uppermost supporting tooth contour.
  • Figure 4b the situation is shown schematically, in which all roller elements 9 are in engagement with the respective uppermost jaw contour of the curved extending mounting groove 3.
  • Each of the individual roller elements 9 experiences a holding force F originating from the respective threaded spindle, through which the roller elements are literally pressed into the carrier tooth contour (see arrow illustration in FIG. 4 b).
  • the guide means 8 shown in Figures 3 and 4 illustrates the special feature of a self-supporting construction, which can be precisely guided longitudinally movable a fir tree-shaped fastening groove. It serves as a kind of movable substructure for a further, on the Support plate 10 of the guide means 8 to be fastened receiving and fixing unit 17, see Figure 6, with which it is possible to position the material-removing tool spatially in relation to a supporting teeth to be machined within the mounting groove precisely.
  • FIG. 5 shows the cross section of a fastening groove 2 in which different positions for the material-removing tool 5 are shown.
  • the milling tool 5 is necessary to position the milling tool 5 relative to the groove depth axis NA, whereby the milling tool 5 can be positioned relative to support teeth 4 of the fastening groove mounted at different depths. Furthermore, the milling tool 5 is to be positioned along its milling axis FA in order to ultimately define the depth of the material removal along a support tooth. It is also important to be able to pivot the milling tool 5 with respect to an axis perpendicular to the plane of the drawing of FIG. 5, in order to be able to adapt the milling head of the milling tool 5 to the respective contour inclination of a respective supporting tooth. This degree of freedom is illustrated by the representation with the different arrows 15.
  • the receiving and fixing unit for the material-removing tool 5 to be described below is to be designed in such a way that all of the above-described setting possibilities for the milling tool 5 can be realized very precisely.
  • Such a receiving and fixing unit is to be mounted on the upper side of the carrier plate such that the material-removing tool can be fixed in a fixed space relative to the carrier plate by an opening in the carrier plate.
  • FIG. 6 shows such a receiving and fixing unit 17 in isolation, which has the following components.
  • the unit Based on the illustrated material-removing tool 5, the unit has a linear guide 18, with an adjustment unit 19 designed as a screw spindle, with which the material-removing tool 5 along a predetermined linear axis is adjustable. With the aid of the adjustment unit 19, the depth of cut or the amount of material to be removed in the way of a milling process can thus be adjusted.
  • the adjustment unit 20 In order to specify the inclination of the milling axis according to the contour of a support to be machined within the mounting groove, which is Linear guide 18 pivotally mounted within an angular adjustment unit 20.
  • the angle adjustment unit 20 has two mutually spaced side plates 21, between which the linear guide 18 is mounted. Only for the sake of better illustration, the plate 21 facing the observer in FIG. 6 is shown transparently. For pivoting the
  • the linear guide 18 relative to the angle adjustment unit 20
  • the linear guide 18 is rotatably articulated to a rear axis of rotation D relative to the angle adjustment unit 20.
  • the angle adjustment unit 20 has a plurality of vertically stacked holes 22, in which the linear guide 18 can be fixed by means of suitable bolts B. Instead of the multiplicity of holes 22, it is also possible for continuous slots to be provided in the angle adjustment unit 20.
  • a Vertikalverstellech 21 ensures a precise lowering of the material-removing tool 5 along the groove depth of a machined
  • FIG. 7 shows an overall view of a device designed in accordance with the invention, comprising the following components: On the underside of the carrier plate 10, roller elements 9 are mounted on the plate-shaped guide means 8, which in each case are connected in pairs via connecting webs 12a, 12b, etc. according to FIGS 1 made statements are connected. At the top of the support plate 10, the receiving and fixing unit 17 is mounted for the only partially visible material-removing tool 5. The receiving and fixing unit 17 is connected via fastening angle elements 25 with the support plate 10. About slot-shaped bushings within the support plate 10 are each two motor drive shafts 26 are provided for driving two roller elements.
  • the receiving and fixing unit 17 has the linear guide 18, the Winkelverstelltechnik 20 and the Vertikalverstelltechnik 23.
  • the device shown in Figure 7 is compact and with a small
  • Weight for example, in the order of 15kg feasible so that it can be operated by a single person. Due to the high flexibility, due to the force-loaded mobility of the roller elements 9, the device can be used on almost any desired attachment grooves, provided that they have a required for the roller elements engagement contour.
  • Roller elements 0 Carrier plate 1 Guide groove 2a, b, c, d Connecting webs 3 Fastening web 4 Fastening web 5 Different milling directions 6 Opening 7 Mounting fixing unit 8 Linear guide 9 Adjusting unit 0 Angle adjustment unit 1 Side plates 22 holes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Milling Processes (AREA)

Abstract

L’objet de la présente invention est un dispositif de rectification de rainures de fixation (3) servant à loger des aubages dans un système de turbine à gaz et/ou à vapeur et disposant respectivement d’un contour de rainure (3) conçu sous forme de profil de sapin le long d’un axe de profondeur de gorge (NA) s’étendant en direction de la profondeur de gorge, avec un certain nombre de dents porteuses (4) respectivement opposées par paire et disposées le long de l’axe de profondeur de gorge (NA). L’invention se caractérise en ce qu’elle prévoit un moyen de guidage (8) sur lequel des éléments à rouleaux (9) sont disposés de manière mobile afin de pouvoir s’engrener le long d’une paire de dents porteuses de telle sorte que le moyen de guidage (8) soit disposé par guidage forcé de manière mobile le long de la rainure de fixation (3) et à un écart fixe par rapport à cette rainure (3) et qu’il présente une unité de logement et de fixation (17) pour un outil servant à l’enlèvement de matière (5). Cette unité (17) permet de fixer l’outil (5) à une profondeur de pénétration pouvant être définie le long de l’axe de profondeur de la rainure (NA) et à une inclinaison définie à l’opposé de l’axe de profondeur de la rainure (NA).
PCT/EP2009/050898 2008-03-03 2009-01-28 Dispositif de rectification de rainures de fixation servant à loger un aubage d’un système de turbine à gaz et/ou à vapeur WO2009109422A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008000480.4 2008-03-03
DE200810000480 DE102008000480A1 (de) 2008-03-03 2008-03-03 Vorrichtung zur Nachbearbeitung von Befestigungsnuten zur Aufnahme einer Beschaufelung einer Gas- und/oder Dampfturbinenanlage

Publications (1)

Publication Number Publication Date
WO2009109422A1 true WO2009109422A1 (fr) 2009-09-11

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PCT/EP2009/050898 WO2009109422A1 (fr) 2008-03-03 2009-01-28 Dispositif de rectification de rainures de fixation servant à loger un aubage d’un système de turbine à gaz et/ou à vapeur

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DE (1) DE102008000480A1 (fr)
WO (1) WO2009109422A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220362865A1 (en) * 2019-10-30 2022-11-17 General Electric Company System and method for machining a slot in an inner surface of a casing for a gas turbine engine

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DE102009033234A1 (de) * 2009-07-14 2011-01-27 Alstom Technology Ltd. Verfahren zum Bearbeiten des Rotors einer Turbine
US20140223709A1 (en) * 2013-02-08 2014-08-14 General Electric Company Turbomachine rotor blade milling machine system and method of field repairing a turbomachine rotor blade
US9827628B2 (en) 2015-03-27 2017-11-28 General Electric Company Fixture for electro-chemical machining electrode
US9943920B2 (en) 2015-03-27 2018-04-17 General Electric Company Method for electro-chemical machining turbine wheel in-situ
US9623492B2 (en) * 2015-03-27 2017-04-18 General Electric Company Milling tool for portion of slot in rotor
US9803647B2 (en) * 2015-07-21 2017-10-31 General Electric Company Method and system for repairing turbomachine dovetail slots
DE102015222529A1 (de) * 2015-11-16 2017-05-18 Siemens Aktiengesellschaft Fräseinrichtung sowie Verfahren zur Durchführung einer Fräsbearbeitung innerhalb einer Nut
US10005139B2 (en) * 2015-12-21 2018-06-26 General Electric Company Portable milling tool with method for turbomachine milling
DE102016205222A1 (de) 2016-03-30 2017-10-05 Siemens Aktiengesellschaft Aufbau für längliche Ausnehmungen, insbesondere Nuten
DE102017211904A1 (de) * 2017-07-12 2019-01-17 Siemens Aktiengesellschaft Verfahren zur Durchführung einer und Vorrichtung zur materialabtragenden Bearbeitung eines Bauteils
CN112775473A (zh) * 2020-12-18 2021-05-11 成都谦睿哲环保科技有限公司 一种手动折叠锯的手柄滑槽加工装置

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GB166669A (en) * 1920-04-15 1921-07-15 Hoe & Co R Improvements in machines for trimming and finishing printing plates and other articles
DE418366C (de) * 1924-12-23 1925-09-05 Delmag Deutsche Elmasch & Moto Fraeskopf mit Antrieb durch biegsame Welle und mit je einem Handgriff in Richtung der Werkzeugachse und senkrecht dazu
GB519102A (en) * 1938-11-07 1940-03-15 Arthur Milton Improvements in machine tools for accurately producing or finishing curved surfaces
EP1407852A2 (fr) * 2002-10-07 2004-04-14 United Technologies Corporation Procédé d'usinage de fentes axiales pour des aubes aux disques de turbines pour moteurs à réaction
EP1003436B1 (fr) * 1997-08-20 2004-06-23 Kaltenbach & Voigt GmbH & Co. KG Instrument medical ou dentaire et outil pour ledit instrument
EP1500453A1 (fr) * 2003-07-24 2005-01-26 United Technologies Corporation Production des rainures
WO2005046917A1 (fr) * 2003-11-11 2005-05-26 Mtu Aero Engines Gmbh Outil de fraisage et procede de fraisage de cavites

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DE19742137A1 (de) * 1997-09-24 1999-03-25 Siemens Ag Walzvorrichtung zum Erzeugen von Druckeigenspannungen in einem Bauteil

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Publication number Priority date Publication date Assignee Title
GB166669A (en) * 1920-04-15 1921-07-15 Hoe & Co R Improvements in machines for trimming and finishing printing plates and other articles
DE418366C (de) * 1924-12-23 1925-09-05 Delmag Deutsche Elmasch & Moto Fraeskopf mit Antrieb durch biegsame Welle und mit je einem Handgriff in Richtung der Werkzeugachse und senkrecht dazu
GB519102A (en) * 1938-11-07 1940-03-15 Arthur Milton Improvements in machine tools for accurately producing or finishing curved surfaces
EP1003436B1 (fr) * 1997-08-20 2004-06-23 Kaltenbach & Voigt GmbH & Co. KG Instrument medical ou dentaire et outil pour ledit instrument
EP1407852A2 (fr) * 2002-10-07 2004-04-14 United Technologies Corporation Procédé d'usinage de fentes axiales pour des aubes aux disques de turbines pour moteurs à réaction
EP1500453A1 (fr) * 2003-07-24 2005-01-26 United Technologies Corporation Production des rainures
WO2005046917A1 (fr) * 2003-11-11 2005-05-26 Mtu Aero Engines Gmbh Outil de fraisage et procede de fraisage de cavites

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220362865A1 (en) * 2019-10-30 2022-11-17 General Electric Company System and method for machining a slot in an inner surface of a casing for a gas turbine engine
US11925991B2 (en) * 2019-10-30 2024-03-12 General Electric Company System and method for machining a slot in an inner surface of a casing for a gas turbine engine

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