How are turbine blades attached to the turbine

WO2015043874A1 - Arrangement for fastening turbine blades - Google Patents

Arrangement for fastening turbine blades Download PDF

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Publication number
WO2015043874A1
WO2015043874A1PCT / EP2014 / 068354EP2014068354WWO2015043874A1WO 2015043874 A1WO2015043874 A1WO 2015043874A1EP 2014068354 WEP2014068354 WEP 2014068354WWO 2015043874 A1WO2015045074 A1WO2015043874 A1
Authority
WHERE
WIPO (PCT)
Prior art keywords
turbine
arrangement
turbine blade
chisel
turbine blades
Prior art date
Application number
PCT / EP2014 / 068354
Other languages
English (en)
French (fr)
Inventor
Stefan Bentele
Ulrich Beul
Frank Brumbi
Oliver Ceranski
Manuel Ettler
Thomas Helmis
Markus Hofmann
Daniel Lindemann
Adam Maguire
Oliver Ricken
Andreas Stiehm
Original assignee
Siemens Aktiengesellschaft
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
Priority to EP13185739.3ApriorityCriticalpatent / EP2851515A1 / de
Priority to EP13185739.3priority
Application filed by Siemens AktiengesellschaftfiledCriticalSiemens Aktiengesellschaft
Publication of WO2015043874A1publicationCriticalpatent / WO2015043874A1 / de

Left

  • 239000002184metalSubstances0.000claimsabstractdescription9
  • 239000000306componentSubstances0.000claims3
  • 238000009434installationMethods0.000description6
  • 239000000463materialSubstances0.000description4
  • 230000000875correspondingEffects0.000description3
  • 239000000969carrierSubstances0.000description2
  • 241000282941Rangifer tarandusSpecies0.000description1
  • 238000005452 bendingMethods0.000description1

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 — stator
    • 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 / 042-Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
    • F01D9 / 044-Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators permanently, e.g. by welding, brazing, casting 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
    • 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 / 30 — Fixing blades to rotors; Blade roots; Blade spacers
    • F01D5 / 3007 — Fixing blades to rotors; Blade roots; Blade spacers of axial insertion type
    • 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
    • F01D5 / 3092 — Protective layers between blade root and rotor disc surfaces, e.g. anti-friction layers
    • 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 — stator
    • 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 / 042-Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to 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
    • F05D2220 / 00 — Application
    • F05D2220 / 30 — Application in turbines
    • F05D2220 / 31 — Application in turbines in steam turbines
    • 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 / 20 — Manufacture essentially without removing material
    • F05D2230 / 23 — Manufacture essentially without removing material by permanently joining parts together
    • 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
    • F05D2240 / 00 — Components
    • F05D2240 / 10 — stator
    • F05D2240 / 12-Fluid guiding means, e.g. vanes
    • 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
    • F05D2300 / 00-Materials; Properties thereof
    • F05D2300 / 50 — Intrinsic material properties or characteristics
    • F05D2300 / 502 — Thermal properties
    • F05D2300 / 5021 — Expansivity
    • F05D2300 / 50212 — Expansivity dissimilar

Abstract

Description

Arrangement for fastening turbine blades
The invention relates to an arrangement for fastening turbine blades, the turbine blades having a turbine blade root which is fitted into a groove in a component, a caulking piece being arranged between the turbine blade root and the component.
Steam turbines as an embodiment of a flow machine comprise a comparatively large number of turbine blades that are in operation¬ vanes and guide vanes are divided. The rotor blades are arranged on the rotor and the guide vanes are arranged in the casing. The guide vanes have a vane root which is installed in a corresponding groove in the housing. The installation he¬ usually follows by hand, which means that an employee¬ ter manually insert the individual steam turbine guide vanes into the corresponding grooves with an appropriate force. In addition, a caulking piece is caulked between the blade root and the groove in order to exert a force for fixing. Some guide vanes have shrouds that are twisted with respect to the root.
The documents DE 32 36 021 A, EP 2 372 095 A, JP S61 129405A, WO 2013 / 017805A and WO 2012/15663, 3A each disclose a turbine blade attachment. The caulking piece is usually driven with hammer blows, which means a lot of effort and is associated with rapid fatigue of the employee concerned.
The invention aims to remedy this. The object of the invention is to provide an arrangement for which less effort has to be expended. This task is solved by an arrangement for fastening¬ supply of turbine blades, the turbine blades having a turbine blade root which is inserted into a groove in a com¬ component is fitted, wherein a caulking piece is arranged between the turbine blade root and the component, wherein the caulking piece is a bi-metal and the turbine blade is designed as a turbine guide vane.
Thus, according to the invention, it is proposed to design the chisel pieces for fixing the turbine blade from a bimetal¬ The chisels should be straight at the installation temperature and have a slight oversize between 0.1mm and 0.2mm. In this case, the turbine blades can be pushed in over the chisel pieces with little effort. The small excess is sufficient to advance the shovel¬ tension or jam and thus fix it in its final position. According to the invention, the tempe¬ rature necessarily increases, which leads to a bending of the bi-metal in the direction of the turbine blade root. This means that a force is exerted by the bi-metal on the turbine blade root and the groove, which leads to a fixation.
Therefore, no design changes need to be made. Chisels previously used can be replaced by chisels made of bi-metal. The physical exertion for the employees would be reduced, which would also lead to a reduction in the risk of accidents. Overall, the effort required to push the turbine blade over the caulking piece is thus reduced.
Furthermore, the simplified installation reduces costs, since more turbine blades can be installed in the same time. The invention is now based on an exemplary embodiment¬ explained here. The figures show schematically an embodiment of the invention.
Figure 1 is a schematic representation of a turbine blade root in a component, Figure 2 is a bi-metal chisel at installation temperature,
Figure 3 a bi-metal chisel at operating temperature,
FIG. 4 shows a schematic representation of a turbine guide vane root and FIG
FIG. 5 shows a schematic representation of a turbine guide vane root with a hammer root shape.
FIG. 1 shows an arrangement for fastening turbine blades 2 in a groove 3 of a component 4.The turbine blade 2 has a turbine blade root 5 which is fitted into the corresponding groove 3. Between the Turbi¬ nenschaufelfuß 5 and the component 4, a caulking piece 6 is arranged, wherein the caulking piece 6 is a bi-metal.
The turbine blade 2 is designed as a turbine guide vane for a steam turbine. Likewise, the turbine blade 2 could be used as a compressor blade for a gas turbine or a Ver¬ be formed more densely.
The component 4 is designed as a housing, in particular an inner housing, of a steam turbine.
FIG. 2 shows the caulking piece 6 at the installation temperature. The caulking piece 6 comprises a first material 7 and a second material 8, which are firmly connected to one another by connections 9 that are rigid at the ends.
The first material 7 has a different thermal expansion behavior compared to the second material 8. As a result, when the temperature increases, the geometric shape of the caulking piece 6 is changed, which is shown in FIG. The caulking piece 6 shows a bending in one direction. Since the caulking piece 6 is arranged in a gap 10 between the turbine blade root 5 and the groove 3 at the installation temperature, a rise in temperature during operation results in an increase in force between the turbine blade root 5 and the groove 3, which leads to a better fixation of the turbine blade 2 .
In the example shown here, there was a turbine show¬ fel shown for use in a steam turbine. An application for compressor blades in gas turbines is just as possible.
The invention can also be used for turbine guide vanes, which is shown in FIG. The door shown in Figure 4¬ The binenleitschaufel has a door designed as a hook foot¬ bin blade root 5. This has a surface 12 pointing towards a guide display carrier 11. In the guide vane¬ carrier 11, a gap 13 is formed in which the caulking piece 6 is arranged.
Furthermore, the turbine blade root 5 has a substantially laterally arranged side surface 14, which in the We¬ sentlichen is aligned perpendicular to the surface 12. The caulking piece 6 is arranged in a laterally arranged gap 13, which leads to an additional fixation. FIG. 5 shows a turbine blade root 5 designed as a hammer root.

Claims

PCT / EP2014 / 0683542013-09-242014-08-29 Arrangement for fastening turbine blades WO2015043874A1 (de)

Priority Applications (2)

Application NumberPriority DateFiling dateTitle
EP13185739.3AEP2851515A1 (de) 2013-09-242013-09-24Arrangement for fastening turbine blades
EP13185739.32013-09-24

Applications Claiming Priority (2)

Application NumberPriority DateFiling dateTitle
US14 / 915,686US20160194970A1 (en) 2013-09-242014-08-29Arrangement for securing turbine blades
EP14759132.5AEP3025029A1 (de) 2013-09-242014-08-29Arrangement for fastening turbine blades

Publications (1)

ID = 49303725

Family Applications (1)

Application NumberTitlePriority DateFiling date
PCT / EP2014 / 068354WO2015043874A1 (de) 2013-09-242014-08-29Arrangement for fastening turbine blades

Country Status (3)

Citations (5)

Publication numberPriority datePublication dateAssigneeTitle
DE3236021A1 (de) *1981-11-101983-05-19Bbc Brown Boveri & CieBladed turbine rotor body
JPS61129405A (en) *1984-11-281986-06-17Hitachi LtdFixing method of turbine moving blade
WO2005066463A1 (de) *2003-12-232005-07-21Siemens AktiengesellschaftTurbomachine with a guide vane carrier and a method for mounting guide vanes on a guide vane carrier
WO2012156633A1 (fr) *2011-05-172012-11-22SnecmaRoue à aubes de turbomachine
WO2013017805A1 (fr) *2011-08-032013-02-07SnecmaRoue à aubes de turbomachine

Family Cites Families (8)

Publication numberPriority datePublication dateAssigneeTitle
US2013512A (en) *1933-03-111935-09-03Laval Steam Turbine CoGuide vane and diaphragm construction for turbines
US2807435A (en) *1951-06-121957-09-24Fairchild Engine & AirplaneTurbine stator blade
CH676735A5 (de) *1988-08-031991-02-28Asea Brown Boveri
US6290466B1 (en) *1999-09-172001-09-18General Electric CompanyComposite blade root attachment
US7488153B2 (en) *2002-07-012009-02-10Alstom Technology Ltd.Steam turbine
EP2239423A1 (de) *2009-03-312010-10-13Siemens AktiengesellschaftAxial turbo machine with passive control of the blade tip clearance
EP2372095A1 (de) *2010-03-262011-10-05Siemens AktiengesellschaftMethod and device for attaching a blade to the rotor by means of shape memory material
DE102013213834A1 (de) *2013-07-152015-02-19MTU Aero Engines AGMethod for producing an insulation element and insulation element for a housing of an aircraft engine

Patent Citations (5)

Publication numberPriority datePublication dateAssigneeTitle
DE3236021A1 (de) *1981-11-101983-05-19Bbc Brown Boveri & CieBladed turbine rotor body
JPS61129405A (en) *1984-11-281986-06-17Hitachi LtdFixing method of turbine moving blade
WO2005066463A1 (de) *2003-12-232005-07-21Siemens AktiengesellschaftTurbomachine with a guide vane carrier and a method for mounting guide vanes on a guide vane carrier
WO2012156633A1 (fr) *2011-05-172012-11-22SnecmaRoue à aubes de turbomachine
WO2013017805A1 (fr) *2011-08-032013-02-07SnecmaRoue à aubes de turbomachine

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