EP3510255A1 - Procédé d'affection de position et d'identification univoques d'une aube de turbine - Google Patents

Procédé d'affection de position et d'identification univoques d'une aube de turbine

Info

Publication number
EP3510255A1
EP3510255A1 EP17768699.5A EP17768699A EP3510255A1 EP 3510255 A1 EP3510255 A1 EP 3510255A1 EP 17768699 A EP17768699 A EP 17768699A EP 3510255 A1 EP3510255 A1 EP 3510255A1
Authority
EP
European Patent Office
Prior art keywords
turbine
blade
borescope
lock
gas turbine
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.)
Granted
Application number
EP17768699.5A
Other languages
German (de)
English (en)
Other versions
EP3510255B1 (fr
Inventor
Tim Frederik Zippel
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.)
Lufthansa Technik AG
Original Assignee
Lufthansa Technik AG
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 Lufthansa Technik AG filed Critical Lufthansa Technik AG
Publication of EP3510255A1 publication Critical patent/EP3510255A1/fr
Application granted granted Critical
Publication of EP3510255B1 publication Critical patent/EP3510255B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
    • 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
    • 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
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • 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
    • 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
    • F05D2230/72—Maintenance
    • 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
    • F05D2260/00—Function
    • F05D2260/80—Diagnostics

Definitions

  • the invention relates to methods for unambiguous position allocation and identification of a turbine blade of a high pressure turbine stage of a gas turbine, in particular an aircraft ⁇ generating engine.
  • the turbine blades of the high-pressure turbine are among the most stressed components of a gas turbine or an aircraft engine.
  • small Bebul ⁇ endings or deviations from their respective original shape of the high pressure turbine turbine shop fine already have a decisive influence on the efficiency of the gas turbine, which has last ⁇ finally IELD effect on the fuel.
  • the high pressure turbine blades are regularly overhauled or, if this is not mög ⁇ Lich, replaced by new ones.
  • the gas turbine must be disassembled ⁇ minimum extent that the turbine blades of the high pressure turbine can be removed.
  • the previously entnomme ⁇ NEN turbine blades can be mounted again after a possibly time-consuming overhaul.
  • other already outdated turbine blades or new parts can be mounted to keep the required maintenance time for the gas turbine as short as possible. The latter is in particular ⁇ sondere in aircraft engines is important.
  • Turbine blades regularly have a unique serial number. For turbine blades of aircraft engines is this is even mandatory due to licensing requirements.
  • the serial numbers are at the base of the turbine blades, with which the blades are attached to the blade carrier of the engine, arranged to avoid that they come into direct contact with the hot gas stream and are made unrecognizable by this.
  • a disadvantage of the positioning of the serial number at the bottom of a turbine blade is that the serial numbers are no longer visible after Einset ⁇ zen the turbine blades. So it is not possible to check the serial number of a single engine blade at a fully assembled gas turbine or a fully ⁇ constantly mounted aircraft engine. In order to determine the serial number of a particular engine blade, according to the prior art rather an almost complete disassembly of the entire gas turbine is required.
  • An object of the present invention is to provide methods by which a unique position allocation and identification of a turbine blade of a Hochdruckturbi ⁇ nenrage a gas turbine is possible, without having to identifi cation ⁇ disassembly of the gas turbine would be required.
  • the invention relates to a method of uniquely locating a turbine bucket of a turbine high pressure turbine stage connected via a shaft to a high pressure compressor, wherein each turbine bucket of the high pressure turbine is uniquely identifiable with its relative location in a record card, comprising the steps of: a. Determining the position of a given paddle lock a predetermined stage of the high-pressure compressor, wherein the step of the high-pressure compressor is selected such that the paddle lock in the fully assembled state of the gas turbine can be brought by rotating the shaft in the field of view of a guided through a first Boroskopö réelle on the gas turbine first borescope and is clearly identifiable ⁇ ; and b.
  • the invention relates to a method for uniquely identifying the turbine blade of the high-pressure turbine of a gas turbine marked on the record card with the above method according to the invention, comprising the steps of: a. Inserting a first borescope through a first borescope opening on the gas turbine and a second borescope through a second borescope opening on the gas turbine; and b. Until the given before ⁇ blade lock in the field of view of the borescope is first rotate the high pressure compressor and the high pressure turbine stage connecting shaft, whereby the selected set on the map turbine blade in the field of view of the borescope is second.
  • Blades of gas turbines and aircraft engines include an airfoil and a blade root.
  • the blade root has at such a regular shape, which allows insertion of the blade root into a blade groove of the blade carrier ei ⁇ ner turbine stage.
  • To secure one or several ⁇ rer blades in the blade groove one or more "Look ⁇ felschlösser" provided with which the vanes are fixed in their position relative to the blade carrier.
  • the invention is based on the recognition that the viewable by a second borescope in a fully assembled Gastur ⁇ bine portions of the high pressure turbine of the specific load by coming from the combustion chamber hot gas is subject, which is why all mounted in this area marks having at least a first test run of the gas turbine would be removed or burned. Due to the be ⁇ Sonderen load in this range, the high-pressure turbines are designed so regularly that in fully assembled gas turbine visible through a second borescope surfaces of the high-pressure turbine or the like not indicative of the angular position allow.
  • the invention has recognized, however, that the points with the high-pressure turbine via a shaft rotatably connected Hochdruckkompres ⁇ sor by a first borescope even when fully assembled gas turbine uniquely identifiable blade locks on ⁇ that serve as a recognition of the angular position of the high ⁇ pressure compressor and the high pressure turbine can. Knowing the position of the Boroskopö réelleen for the first and the second borescope can be accurately determine which Tur ⁇ binenschaufel in the field of view of the second borescope, when the predetermined paddle lock in the field of view of the first borescope.
  • the determination of the turbine blade to be marked on the record card can alternatively or additionally be facilitated if the turbine blades have a visible temporary identification feature after assembly.
  • a visible temporary identification feature e.g. the serial number of the individual turbine blades be applied directly to the blade, that is, at a location that is visible even after installation of the turbine blade.
  • Such an identification feature which is also visible when installed, is fundamentally a temporary identification feature which, after a first test run of the gas turbine, is already burnt without residue due to the particular stresses in the area of the high-pressure turbine.
  • first and a second blade lock identifi adorn ⁇ can usually clearly a first and a second blade lock identifi adorn ⁇ .
  • the distance in the circumferential direction against a predetermined direction of rotation between the first paddle lock and the second paddle lock is generally smaller than the corresponding distance between the last paddle lock - which may also be the second paddle lock - and the first ten paddle lock.
  • the second blade lock is in the predetermined rotational direction in the circumferential direction to the first blade subsequent lock blade lock. It is preferred if the predetermined paddle lock is the second paddle lock. As explained below, this can facilitate the later identification of the turbine marked on the record card.
  • a first boroscope is guided through a first borescope opening on the gas turbine and a second borescope through a second borescope opening on the gas turbine.
  • the first Boroskopö réelle is arranged so that through a boroscope passed through the predetermined blade lock the predetermined stage of the high-pressure compressor can be viewed, while the second Boroskopö réelle allows viewing of the turbine blades of the relevant high-pressure turbine stage using a borescope.
  • the second boroscope can also be introduced later - the shaft is rotated onto both the high pressure compressor and the high pressure turbine stage until the predetermined blade lock is within the field of vision of the first borescope.
  • the turbine blade which is then visible through the now introduced the latest second borescope, then the marked set on the map turbine blade.
  • the rotation speed can after recognition of first paddle lock by the first borescope are preferably reduced in order to hold the shaft ⁇ delay possible as soon as the second paddle lock in
  • the rotational speed may initially be relatively high in order to rotate the shaft quickly to the area where the second blade lock is in order to then be able to stop immediately the shaft due to a comparatively nied ⁇ membered rotational speed when the second blade lock comes into the field of vision of the first borescope.
  • the turbine blade marked on the record card is uniquely identified, preferably by subsequently rotating the shaft connecting the high pressure compressor and the high pressure turbine stage, observing the turbine blades through the second borescope or observing the angular position of the shaft, at least one turbine blade is identified from the block card. Since the block diagram shows the relative position of the individual turbine blades, the respectively adjacent turbine blades can be identified starting from the clearly identified marked turbine blade, and the successive turbine blades can be identified one after the other. Since the basic geometric configuration of the turbine blades of a gas turbine is known, it is also possible, via the angular position of the shaft, starting from the win ⁇ kellage, which occupies the shaft in the identification of the marked turbine blade, a turbine blade not adjacent to the marked turbine blade iden ⁇ be authenticated.
  • Figure 1 a high-pressure turbine stage with a connected via a shaft high-pressure compressor;
  • FIG. 2 a detailed view of the high pressure compressor
  • FIG. 1 The first figure.
  • FIG. 3 shows an aircraft engine with the high-pressure turbine stage and the high-pressure compressor according to FIG. 1.
  • FIG. 1 is a schematic representation of a high-pressure turbine stage 10 of a gas turbine 1 or of an aircraft engine 1 (see FIG. 3).
  • the high-pressure turbine stage 10 has a plurality of turbine blades 11, whose respective serial number is engraved on the blade root and recorded on a record card in their relative position.
  • a set of map since ⁇ have in the form of a list of serial numbers, wherein the order of listing of the assembly of the turbine blades in the circumferential direction of the high-pressure turbine stage corresponds.
  • the high-pressure turbine stage 10 is rotatably connected via a shaft 20 to a two-stage high-pressure compressor 30.
  • Each of the two stages of the high-pressure compressor 30 comprises a plurality of compressor blades 31 which are secured in their position relative to the blade carrier of the respective stage of the high-pressure compressor 30 via two blade locks 32 in each case (only one blade lock 32 is visible in FIG.
  • FIG. 2 shows the high-pressure compressor 30 from FIG. 1 enlarged. Between the blades 31 of the one stage of the high pressure compressor 30, two blade locks 32, 32 can be seen ⁇ . In this case, the distance in the circumferential direction between the first blade lock 32 ⁇ and the second blade lock 32 against the predetermined direction of rotation 90 - does not have to match the direction of rotation of the aircraft engine 1 during operation - less than the distance between the second and in the direction of rotation last padlock 32 and the first paddle lock 32 ⁇ .
  • the paddle lock 32 thus identified as the second paddle lock 32 serves as a base for the tag 21 along the shaft 20 which is applied with an aviation-certified marking pin.
  • the marking 21 indicates the win ⁇ kellage of the paddle lock 32 relative to the axis of the shaft 20.
  • that of turbine blade 11 may be ⁇ marked on the record card, which - based as will be described of Figure 3 - in the completely mounted state of the aircraft engine 1 in view of a run through a second Boroskopö réelle 5 of the aircraft engine 1 second borescope 42 is when the predetermined cam lock 32 is in the field of view of a first borescope 41 guided through a first borescope opening 4 of the aircraft engine 1.
  • the shaft 20 is rotated at a first rotational speed in the direction of rotation 90 ⁇ tion.
  • the first blade lock 32 is ⁇ be seen, the Drehgeschwindig ⁇ ness is reduced and the shaft 20 when the second lock blade 32 in the field of view of the first borescope 41 is ge ⁇ stops. If the second blade lock 32 is located in the field of view of the first borescope 41, due to the previously made positi ⁇ onszuowski extract in question turbine blade 11, the marked on the set card turbine blade 11 immediately in view ⁇ field of the second borescope 42. The rest of the turbine blades 11 can then starting from the marked turbine blade 11 ⁇ are clearly identified on the basis of the sentence card.

Landscapes

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

Abstract

L'invention concerne un procédé d'affectation de position et d'identification univoques d'une aube (11) de turbine d'un étage (10) de turbine haute pression d'une turbine à gaz (1), en particulier d'un moteur d'avion, une fois celle-ci montée. L'invention concerne un procédé d'affectation univoque de position d'une aube (11) de turbine d'un étage (10) de turbine haute pression d'une turbine à gaz (1) relié à un compresseur haute pression (30) par un arbre (20), chaque aube (11) de turbine de la turbine haute pression (10), ainsi que sa position relative, pouvant être répertoriées dans une carte de groupe avec possibilité d'identification univoque. Le procédé comprend les étapes consistant : a. à déterminer la position d'une pièce intercalaire (32) prédéfinie d'un étage prédéfini du compresseur haute pression (30), l'étage du compresseur haute pression (30) étant sélectionné de telle manière que la pièce intercalaire (32), une fois la turbine à gaz (1) entièrement montée, peut être amenée à la suite d'une rotation de l'arbre (20) dans le champ de vision d'un premier boroscope (41) guidé par une première ouverture (4) de boroscope sur la turbine à gaz (1) et peut être identifiée de manière univoque ; et b. à marquer sur la carte de groupe l'aube (11') de turbine qui, une fois la turbine à gaz (1) entièrement montée, se situe dans le champ de vision d'un deuxième boroscope (42) guidé par une deuxième ouverture (5) de boroscope sur la turbine à gaz (1), lorsque la pièce intercalaire (32) prédéfinie se situe dans le champ de vision du premier boroscope (41). Le procédé d'identification univoque de l'aube (11'), marquée selon l'invention sur la carte de groupe, de la turbine haute pression (10) d'une turbine à gaz (1), comprend les étapes suivantes consistant : a. à introduire un premier boroscope (41) par une première ouverture (4) de boroscope sur la turbine à gaz (1) et un deuxième boroscope (5) par une deuxième ouverture (42) de boroscope sur la turbine à gaz (1) ; et b. à amener en rotation l'arbre (20) reliant le compresseur haute pression (30) et l'étage de turbine haute pression (10), jusqu'à ce que la pièce intercalaire (32) prédéfinie se situe dans le champ de vision du premier boroscope (41), après quoi l'aube (11') de turbine marquée sur la carte de groupe se situe dans le champ de vision du deuxième boroscope (42).
EP17768699.5A 2016-09-06 2017-09-04 Procédé d'affectation de position et d'identification univoques d'une aube de turbine Active EP3510255B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016216895.9A DE102016216895B4 (de) 2016-09-06 2016-09-06 Verfahren zur eindeutigen Positionszuordnung und Identifizierung einer Turbinenschaufel
PCT/EP2017/072052 WO2018046423A1 (fr) 2016-09-06 2017-09-04 Procédé d'affection de position et d'identification univoques d'une aube de turbine

Publications (2)

Publication Number Publication Date
EP3510255A1 true EP3510255A1 (fr) 2019-07-17
EP3510255B1 EP3510255B1 (fr) 2020-08-12

Family

ID=59901484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17768699.5A Active EP3510255B1 (fr) 2016-09-06 2017-09-04 Procédé d'affectation de position et d'identification univoques d'une aube de turbine

Country Status (5)

Country Link
US (1) US10526922B2 (fr)
EP (1) EP3510255B1 (fr)
DE (1) DE102016216895B4 (fr)
ES (1) ES2824523T3 (fr)
WO (1) WO2018046423A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017218426B3 (de) 2017-10-16 2019-01-17 Lufthansa Technik Ag Vorrichtung und Verfahren zur Boroskopinspektion von Strahltriebwerken

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Also Published As

Publication number Publication date
EP3510255B1 (fr) 2020-08-12
WO2018046423A1 (fr) 2018-03-15
US20190345844A1 (en) 2019-11-14
DE102016216895A1 (de) 2018-03-08
ES2824523T3 (es) 2021-05-12
US10526922B2 (en) 2020-01-07
DE102016216895B4 (de) 2019-02-28

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