EP2394026A2 - Aube de turbine à gaz pour turbomachine - Google Patents

Aube de turbine à gaz pour turbomachine

Info

Publication number
EP2394026A2
EP2394026A2 EP10798489A EP10798489A EP2394026A2 EP 2394026 A2 EP2394026 A2 EP 2394026A2 EP 10798489 A EP10798489 A EP 10798489A EP 10798489 A EP10798489 A EP 10798489A EP 2394026 A2 EP2394026 A2 EP 2394026A2
Authority
EP
European Patent Office
Prior art keywords
gas turbine
turbine blade
connecting element
blade
receptacle
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
EP10798489A
Other languages
German (de)
English (en)
Other versions
EP2394026B1 (fr
Inventor
Frank Stiehler
Hans Peter Borufka
Patrick Prokopczuk
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.)
MTU Aero Engines AG
Original Assignee
MTU Aero Engines GmbH
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 MTU Aero Engines GmbH filed Critical MTU Aero Engines GmbH
Publication of EP2394026A2 publication Critical patent/EP2394026A2/fr
Application granted granted Critical
Publication of EP2394026B1 publication Critical patent/EP2394026B1/fr
Not-in-force 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
    • 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
    • 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
    • F01D5/34—Rotor-blade aggregates of unitary construction, e.g. formed of sheet laminae
    • 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
    • F05D2250/00—Geometry
    • F05D2250/10—Two-dimensional
    • F05D2250/18—Two-dimensional patterned
    • F05D2250/183—Two-dimensional patterned zigzag
    • 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
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking

Definitions

  • the invention relates to a gas turbine blade, in particular a compressor and / or turbine blade, for a turbomachine.
  • the invention further relates to a shroud segment for arrangement on a gas turbine blade, a connection system referred to in the preamble of claim 10, a method referred to in the preamble of claim 12 for connecting a gas turbine blade with a connecting element and a rotor specified in the preamble of claim 13 Kind for a turbomachine.
  • each gas turbine blades When joining gas turbine blades and rotor disks or rings during assembly, repair or maintenance, each gas turbine blades must be positioned, displaced or rotated relative to adjacent gas turbine blades and thereby provided with a pre-tension (so-called pre-twist).
  • pre-twist a pre-tension
  • various connecting elements or special tools by means of which a corresponding mechanical load in the gas turbine blade in question can be introduced.
  • a disadvantage of the known fasteners is the fact that they are relatively expensive, do not allow optimum load transfer into the gas turbine blade and even damage the gas turbine blade in the load application.
  • the object of the present invention is to enable an improved possibility for load introduction into a gas turbine blade.
  • a gas turbine blade with the features of claim 1 a shroud segment with the features of claim 8 for placement on a gas turbine blade, a connection system with the features of patent claim 10, a method having the features of claim 12 for connecting a Gas turbine blade solved with a connecting element and by a rotor having the features of claim 13 for a turbomachine.
  • Advantageous embodiments of the invention are specified in the respective subclaims.
  • An improved possibility for load introduction into a gas turbine blade is made possible according to the invention in that the gas turbine blade comprises at least one receptacle for the form-fitting arrangement of a connecting element, by means of which a mechanical load can be introduced into the gas turbine blade.
  • a geometry of the gas turbine blade according to the invention is designed such that the gas turbine blade has a receptacle which forms an integral interface for the form-fitting arrangement of a corresponding connecting element. Due to the integrated receptacle, the gas turbine blade and the connecting element can engage in one another in a form-fitting manner, so that mechanical loads can be transmitted normally, that is to say at right angles to the surfaces of the two connection partners.
  • the connecting element which may be formed, for example, as a tool, pin, mandrel or the like, is in this way easily and without affecting the remaining gas turbine blade areas form fit introduced or inserted into the receptacle and can be solved if necessary correspondingly easy again from the gas turbine blade.
  • the gas turbine blade can be formed weight neutral or even reduced weight and allows due to the simple structural design a short tolerance chain with a correspondingly high repeatability.
  • the respective geometry of the receptacle for example its arrangement, form-fitting depth or boundary, may be selected depending on the geometry or the intended use of the respective gas turbine blade.
  • a radially inner end region of the gas turbine blade for connecting the gas turbine blade to a rotor disk or a rotor ring of the turbomachine and / or a radially outer end region of the gas turbine blade is designed as a shroud segment.
  • the gas turbine blade can be designed as a compressor and / or turbine blade.
  • a radially outer end region designed as a shroud segment serves for damping blade vibrations and is particularly suitable when using the gas turbine blades in a rear turbine stage.
  • the shroud segment reduces the flow around the gas turbine blade tip and thereby increases the efficiency of the associated turbomachine.
  • the shroud segment can in principle be formed in one piece or in several parts with the gas turbine blade.
  • the receptacle is formed on the radially outer end region of the gas turbine blade. By the receptacle at the radially outer end portion of the gas turbine blade is formed, the receptacle is particularly accessible. In this way, a corresponding connecting element, for example a tool, can be correspondingly easily introduced into the receptacle in order to apply a mechanical load to the gas turbine blade.
  • a weight optimization of the gas turbine blade is made possible in a further embodiment in that it is designed as a hollow blade and comprises at least one cavity.
  • the receptacle is formed as a core exit region of the cavity. This allows a particularly space-saving arrangement of the recording without affecting the other gas turbine blade areas. Further advantages result from the gas turbine blade being integrally formed with the receptacle and / or as a cast part. As a result, the gas turbine blade mechanically particularly stable, inexpensive and easy to manufacture.
  • the actual geometry of the gas turbine blade can be completely or at least largely matched to a target geometry.
  • Geometry can be approximated.
  • electrochemical drilling PECM drilling
  • Another aspect of the invention relates to a shroud segment for arrangement on a gas turbine blade, in particular a gas turbine blade according to one of the preceding exemplary embodiments, wherein an improved possibility for load introduction into a gas turbine blade according to the invention is made possible by the shroud segment a receptacle for the positive arrangement of a connecting element, by means of which a mechanical one
  • Last in the shroud segment is introduced, comprises.
  • the resulting advantages are to be taken from the preceding descriptions, wherein advantageous embodiments of the gas turbine blade are to be regarded as advantageous embodiments of the shroud segment and vice versa.
  • the shroud segment can in principle be made in one piece with the gas turbine blade. formed or initially manufactured as a single part and then connected to the gas turbine blade.
  • the shroud segment has two oppositely arranged and in a longitudinal section substantially Z-shaped contact surfaces for attaching corresponding contact surfaces of two further shroud segments.
  • connection system with a gas turbine blade, in particular a compressor and / or turbine blade for a turbomachine, and with a connecting element, by means of which a mechanical load in the gas turbine blade can be introduced, with an improved possibility for load introduction into the gas turbine blade according to the invention is thereby made possible that the gas turbine blade comprises a correspondingly formed with the connecting element receptacle for the positive arrangement of the connecting element. Due to the integrated receptacle, the gas turbine blade and the corresponding connecting element can engage in one another in a form-fitting manner, so that mechanical loads can be transmitted normally, that is to say at right angles to the surfaces of the two connection partners.
  • the gas turbine blade can be provided, for example, before connecting to a shaft of the turbomachine particularly simple and damage-free with a so-called pre-twist.
  • the gas turbine blade can be provided in the context of a repair or overhaul with a so-called re-twist, so that the gas turbine blade can be readjusted.
  • the receptacle as mecanical tool, in particular as mecanical wrench, in particular as a hexagon wrench, for applying the gas turbine blade are formed with a torque.
  • a load introduction into the gas turbine blade can be carried out in a particularly simple and cost-effective manner, without the need for expensive special tools.
  • This also increases the ease of maintenance of the gas turbine blade or a turbomachine provided with this.
  • the receptacle and the connecting element may alternatively or in addition to an Allen-like configuration basically also slot, Pozidriv, Torx, Tri-Wing, Torq set or tensioner-like design.
  • Another aspect of the invention relates to a method for connecting a gas turbine blade, in particular a compressor and / or turbine blade for a turbomachine, with a connecting element, by means of which a mechanical load can be introduced into the gas turbine blade, wherein an improved possibility for load introduction into the gas turbine blade according to the invention is thereby made possible that the connecting element is arranged in a form-fitting manner in a receptacle of the gas turbine blade formed corresponding to the connecting element. Due to the integrated Aufhahme the gas turbine blade and the corresponding connecting element can be arranged positively in one another, so that mechanical loads normal, that can be transmitted perpendicular to the surfaces of the two connection partners.
  • a further aspect of the invention relates to a rotor for a turbomachine with a rotor disk joined with a blade ring or with a rotor ring grooved with a blade ring, wherein according to the invention it is provided that the blade ring has at least one gas turbine blade, the at least one receptacle for the positive arrangement of a Includes connecting element, wherein by means of the connecting element, a mechanical load in the gas turbine blade can be introduced.
  • the rotor is designed as a blisk ("bladed disk”) or as a bling ("bladed ring”) for a compressor and / or for a turbine of a turbomachine, in particular a thermal gas turbine. As a result, a particularly high structural freedom is given.
  • Figure 1 is a schematic perspective view of three gas turbine blades according to the invention, which are arranged on a rotor disk.
  • FIG. 2 is an enlarged plan view of the detail in shown in FIG. 1;
  • FIG. 3 is a schematic side view of a gas turbine blade shown in FIG. 1; FIG.
  • FIG. 4 is a schematic bottom view of the gas turbine blade shown in FIG. 3; FIG. and
  • FIG. 5 is a schematic sectional side view of the gas turbine blade along the in
  • Fig. 4 shown section line V-V.
  • FIG. 1 shows a schematic perspective view of three gas turbine blades 10 according to the invention, which are arranged on a rotor disk 12.
  • an integrally bladed rotor (so-called blisk or "bladed disk”) can be used for a compressor and / or for a turbine of a turbomachine, in particular a thermal gas turbine
  • a rotor ring (not shown) may also be used instead of a rotor disk 12, whereby a so-called bling ("bladed ring”) can be produced Fig. 2).
  • the shroud segments 16 and their respective gas turbine blades 10 are included formed in the present embodiment in one piece as castings.
  • each gas turbine blade 10 is finished by appropriate post-processing methods such as PECM drilling.
  • each gas turbine blade 10 also has an integral receptacle 18, in which a connecting element (not shown) can be arranged in a form-fitting manner.
  • the receptacles 18 are each formed at the radially outer end portion 14a of the gas turbine blades 10 in the shroud segments 16 as mecanicsechskantaufhahmen.
  • hexagonal key-shaped connecting element can be easily inserted into the respective receptacle 18 releasably to pressurize the gas turbine blade 10 in question with a torque.
  • each gas turbine blade 10 can be easily, without damage and provided without the need for special tool with a so-called pre-twist.
  • Fig. 2 shows an enlarged plan view of the detail shown in Fig. 1 ⁇ .
  • each shroud segment 16 has two contact surfaces (so-called Z-Shroud) arranged opposite each other and substantially Z-shaped in longitudinal section for attaching corresponding contact surfaces 20 of the adjacent shroud segments 16.
  • each shroud segment 16 comprises two opposing sealing fins 22 which, in particular during a rotation of the rotor 12 in a abradable region, rub against a sealing structure of an associated turbomachine.
  • FIG. 3 shows, for further clarification, a schematic side view of one of the gas turbine blades 10 shown in FIG. 1.
  • FIG. 3 will be explained below in conjunction with FIGS. 4 and 5.
  • FIG. 4 shows a schematic bottom view of the gas turbine blade 10 shown in FIG. 3
  • FIG. 5 shows a schematic sectional side view of the gas turbine blade 10 along the section line VV shown in FIG.
  • the gas turbine blade 10 in the present case is designed as a hollow blade and comprises at least one cavity 24.
  • the receptacle 18 is in turn formed as a core exit region of the cavity 24.
  • a fir tree structure 26 formed on a radially inner end region 14b of the gas turbine blade can be seen for joining the gas turbine blade 10 to the rotor disk 12.
  • the geometry and form-fitting depth of the receptacle 18 can be formed as a function of the shroud segment geometry be, for example, the core exit area of the cavity 24, the arrangement of the contact surfaces 20 and / or a geometry of the sealing fins 22 can be considered.

Landscapes

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

Abstract

L'invention concerne une aube de turbine à gaz (10), en particulier une aube de compresseur et/ou de turbine, destinée à une turbomachine. Cette aube de turbine à gaz (10) comprend au moins un logement (18) dans lequel un élément de liaison peut être agencé par complémentarité de forme, cet élément de liaison permettant d'appliquer une charge mécanique à l'aube de turbine à gaz (10). L'invention concerne en outre un segment d'anneau de renforcement (16) à placer sur une aube de turbine à gaz (10), un système de liaison comprenant une aube de turbine à gaz (10) et un élément de liaison, un procédé pour relier une aube de turbine à gaz (10) à un élément de liaison, ainsi qu'un rotor pour une turbomachine, ce rotor comprenant un disque de rotor (12) assemblé à une couronne d'aubes ou un anneau de rotor assemblé à une couronne d'aubes.
EP10798489.0A 2009-11-13 2010-11-12 Aube de turbine à gaz pour turbomachine Not-in-force EP2394026B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009052881A DE102009052881A1 (de) 2009-11-13 2009-11-13 Gasturbinenschaufel für eine Strömungsmaschine
PCT/DE2010/001334 WO2011057622A2 (fr) 2009-11-13 2010-11-12 Aube de turbine à gaz pour turbomachine

Publications (2)

Publication Number Publication Date
EP2394026A2 true EP2394026A2 (fr) 2011-12-14
EP2394026B1 EP2394026B1 (fr) 2013-07-17

Family

ID=43901923

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10798489.0A Not-in-force EP2394026B1 (fr) 2009-11-13 2010-11-12 Aube de turbine à gaz pour turbomachine

Country Status (4)

Country Link
US (1) US8622704B2 (fr)
EP (1) EP2394026B1 (fr)
DE (1) DE102009052881A1 (fr)
WO (1) WO2011057622A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10428660B2 (en) * 2017-01-31 2019-10-01 United Technologies Corporation Hybrid airfoil cooling

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL295111A (fr) * 1962-07-11
US3572968A (en) * 1969-04-11 1971-03-30 Gen Electric Turbine bucket cover
US3626568A (en) * 1969-04-23 1971-12-14 Avco Corp Method for bonding pins into holes in a hollow turbine blade
US4136516A (en) * 1977-06-03 1979-01-30 General Electric Company Gas turbine with secondary cooling means
US5393200A (en) * 1994-04-04 1995-02-28 General Electric Co. Bucket for the last stage of turbine
US6158104A (en) * 1999-08-11 2000-12-12 General Electric Co. Assembly jig for use with integrally covered bucket blades
JP2004108290A (ja) * 2002-09-19 2004-04-08 Toshiba Corp タービン動翼
US6883700B2 (en) * 2002-09-26 2005-04-26 Siemens Westinghouse Power Corporation Turbine blade closure system
DE10250779A1 (de) * 2002-10-30 2004-05-19 Alstom (Switzerland) Ltd. Notkühlsystem für ein hitzebelastetes Bauteil
DE102005030516A1 (de) * 2005-06-28 2007-01-04 Man Turbo Ag Rotor für eine Turbine sowie Verfahren und Vorrichtung zur Herstellung des Rotors
US20080145227A1 (en) * 2006-12-19 2008-06-19 Mark Stefan Maier Methods and apparatus for load transfer in rotor assemblies
SG155788A1 (en) * 2008-03-18 2009-10-29 Turbine Overhaul Services Pte Methods and apparatuses for correcting twist angle in a gas turbine engine blade

Non-Patent Citations (1)

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Title
See references of WO2011057622A2 *

Also Published As

Publication number Publication date
DE102009052881A1 (de) 2011-05-26
US20120230825A1 (en) 2012-09-13
WO2011057622A2 (fr) 2011-05-19
WO2011057622A3 (fr) 2011-10-13
US8622704B2 (en) 2014-01-07
EP2394026B1 (fr) 2013-07-17

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