EP2478187A1 - Fixation d'aube avec dispositif de sécurité pour aubes de turbine - Google Patents

Fixation d'aube avec dispositif de sécurité pour aubes de turbine

Info

Publication number
EP2478187A1
EP2478187A1 EP10755152A EP10755152A EP2478187A1 EP 2478187 A1 EP2478187 A1 EP 2478187A1 EP 10755152 A EP10755152 A EP 10755152A EP 10755152 A EP10755152 A EP 10755152A EP 2478187 A1 EP2478187 A1 EP 2478187A1
Authority
EP
European Patent Office
Prior art keywords
rotor
turbine blade
groove
securing
clamping piece
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
EP10755152A
Other languages
German (de)
English (en)
Other versions
EP2478187B1 (fr
Inventor
Thomas Helmis
Heinrich STÜER
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP10755152.5A priority Critical patent/EP2478187B1/fr
Publication of EP2478187A1 publication Critical patent/EP2478187A1/fr
Application granted granted Critical
Publication of EP2478187B1 publication Critical patent/EP2478187B1/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
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/32—Locking, e.g. by final locking blades or keys
    • F01D5/323—Locking of axial insertion type blades by means of a key or the like parallel to the axis of the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/30—Retaining components in desired mutual position
    • F05B2260/301—Retaining bolts or nuts
    • F05B2260/3011—Retaining bolts or nuts of the frangible or shear type
    • 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

Definitions

  • the invention relates to a rotor, comprising at least one turbine blade and a securing device for axial and radial securing of the turbine blade, wherein the rotor comprises a blade groove and the turbine blade comprises a turbine blade root, wherein the blade groove and the turbine blade root are formed such that the turbine show - Base is adjusted in the blade groove.
  • Blade fasteners are typically used to fasten rotor blades to a rotor of a turbomachine, particularly a steam turbine. Due to the relatively rapid rotation of the rotor on the rotor is arranged ⁇ rotor blades are subjected to high centrifugal forces. The turbine blade root of the turbine blades must therefore withstand high forces and is urged radially outward in the blade groove. In addition to the centrifugal forces, strong vibration loads pose a further problem that can result in mechanical damage, material fatigue, corrosion and migration of the blade root within the blade groove. For securing the turbine blade root within the scoop groove different solutions as in ⁇ game as metal wedges, spring washers or sealing pieces are known.
  • metal wedges provide locking of the associated blade root within a blade groove, both axially and radially, it is difficult for large blades to produce sufficient holding forces during rotation in the radial direction with such metal wedges.
  • Disc springs produce only radial holding forces and require additional effort for a locking in the axial direction of the associated blade groove.
  • complex measurements are required for disc springs during assembly. As sealing pieces always two parts must be provided, In addition, their assembly partly requires the processing of the parts by hand.
  • the object of the invention is to provide a blade fastening of a turbomachine in which a precise and firm support of blades, in associated blade holders, is ensured over a long period of operation.
  • This object is achieved by a rotor comprising at least ⁇ a turbine blade according to Claim. 1
  • the securing device has a clamping piece which exerts a radial force from the rotor onto the turbine blade root.
  • the clamping piece is in this case arranged in a groove located in the rotor, wherein the groove may be the same as the groove in which the shear pin is arranged.
  • the size of the clamping piece is chosen such that a force is generated which acts in the radial direction. That means the
  • Turbine blade is pressed against the support flanks of the blade groove. Up to a certain rotational frequency thus a movement of the blades in the groove is effectively prevented. From a certain rotational frequency, the centrifugal forces are so great that a movement is prevented by the concern with the support flanks. However, it is almost inevitable that the turbine blade vibrates despite monocytefestist.
  • the attachment according to the invention also prevents a relative movement between the turbine blade root and the blade groove, whereby surface damage is reduced.
  • the clamping piece has an upper leg and a lower leg, wherein the upper leg on Turbinenschaufelfu. abuts and exerts a force in the radial direction against the turbine blade root. The lower leg rests against the rotor.
  • the invention is characterized in that the upper leg and the lower leg substantially form a V-shape and by skillful material selection, a spring force is exerted, which acts from the rotor to the turbine blade root in the radial direction.
  • the invention is based on the idea that in a show felnut both a radial and axial securing can be arranged on.
  • the shear pin is arranged in a bore in the entspre ⁇ sponding turbine blade and is advantageously of at an edge on the rotor. In this way, an axial movement of the turbine blade root is not possible.
  • a shear pin is arranged both on the leading edge and on the trailing edge of the turbine blade root, an axial displacement of the turbine blade root is effectively prevented in one direction as well as in the other direction.
  • the shear pin is in this case installed in a groove arranged in the rotor.
  • the installation of the shear pin takes place after the turbine blade has been installed in the rotor in the corresponding blade ⁇ groove.
  • a securing element is used, which is designed to secure the clamping ⁇ piece.
  • the clamping piece is used as formed sheet metal and arranged between the clamping piece and the rotor.
  • Figure 1 is a side view of a rotor with a turbine blade ⁇ in the installed state
  • Figure 2 is a cross-sectional view of a portion of a rotor with built-in turbine blade
  • Figure 3 is an enlarged view of a detail of
  • Figure 4 is an enlarged view of a clamping piece
  • Figure 5 is a perspective view of the clamping piece
  • Figure 6 is a perspective view of a Scherstif ⁇ tes
  • Figure 7 is a perspective view of a fuse ⁇ element.
  • FIG. 1 shows a side view of a part of a rotor 1 with a built-in turbine blade 2.
  • the turbine blade 2 has a turbine blade root 3, which is adapted to a corresponding blade groove 4.
  • the turbine acting ⁇ fel 2 is Scheme- in the axial direction 5 into the blade groove 4 postponed.
  • the blade groove 4 is formed as Tannenbaumschaufelnut from ⁇ and includes a plurality of support flanks. 6
  • the turbine blade 2 is secured in the blade groove 4 both in the axial direction 5 and in the radial direction 29.
  • the radial direction 29 substantially corresponds to the longitudinal orientation of the turbine blade 2 and the axial Rich ⁇ tion 5 corresponds substantially to the axis of rotation, which is not shown in detail in Figure 1.
  • a securing means 7, which is attached ⁇ arranged below the turbine blade root 3 can be realized.
  • the turbine blade root 3 is designed in such a way that it fits into the blade groove 4, ie, it can be displaced substantially in the axial direction 5.
  • the securing device 7 essentially comprises three components. This would be on the one hand
  • the securing device 7 is arranged in a corresponding groove 11 in the rotor 1. This groove 11 is formed both on the steam inlet side 12 and on the steam outlet side 13.
  • the incorporation of at least two Sich ceremoniesseinrichtun ⁇ s 7, that is, both the steam inlet side 12 and on the steam outlet side 13, offers the advantage that the door ⁇ binenschaufel 2 can no longer be displaced in the axial direction. 5
  • the shear pin 8 is cylindrical and has a length L which is less than the groove height 14 of the groove 11. This allows easy insertion of the shear pin 8 in the groove 11 is possible.
  • the shear pin 8 is placed in a bore 15 which is located in the blade root 3.
  • the Boh ⁇ fuse 15 and the groove 11 are designed such that when installed, the shear pin 8 rests against an edge 16 in the rotor 1. A displacement of the turbine blade root 3 in the axial direction 5 is thus no longer possible.
  • Another element of the securing device 7 forms the clamping piece 9.
  • Figures 4 and 5 is a perspective and enlarged view of the clamping piece 9 can be seen.
  • the clamping piece 9 with a base body 17 which is cuboid-shaped and an upper leg 18 and a lower leg 19 executed. Between the upper leg 18 and the lower leg 19, a gap 20 is ge ⁇ forms.
  • the dimensions of the clamping piece 9 is such ge ⁇ selected, that the height 21 of the clamping piece 9 is less than the groove height A 14. inserting the clamping piece 9 in the blade groove 4 is therefore easily possible.
  • the dimensions are further selected such that in the installed state, the upper leg 18, a force which a spring force äh ⁇ nelt, presses against the turbine blade root 3.
  • Leg 18 has for this purpose a projection 22 which is approximately one third of the length of the clamping piece 9. Both the upper leg 18 and the lower leg 19 are formed wedge ⁇ shaped, ie from the base body 17 in the direction
  • the securing element 10 is formed as an elongated sheet metal piece which is folded once at its tip 23 once, whereby a projection 28 is formed. When installed, this projection 28 abuts in a corresponding securing groove 24. As shown in Figure 3, thereby an axial displacement 5 of the securing element 10 is effectively avoided. Furthermore, the securing element 10 has an end piece 26 which relative to a main piece 25 is bent perpendicular to the bending point 27.
  • the securing means 7 will now buildsnow- follows: first, the turbine blade 2 is inserted in the blade groove entspre ⁇ sponding. 4 Subsequently, the shear pin 8 is adjusted in the corresponding hole 15. The securing element 10 is inserted in the unbent state and has at the tip 23 a projection 28 which is arranged in a corresponding securing groove 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

L'invention concerne un dispositif de sécurité (7) pour une aube de turbine (2), le dispositif de sécurité (7) comprenant une goupille de cisaillement (8), une pièce de serrage (9) et un élément de sécurité (10), la goupille de cisaillement (8) étant disposée dans un perçage correspondant (15) dans l'emplanture d'aube de turbine (3) et la pièce de serrage (9) étant réalisée avec une branche supérieure (18) et une branche inférieure (19), la pièce de serrage (9) exerçant une force radiale sur l'emplanture d'aube de turbine (3) pour la fixation radiale.
EP10755152.5A 2009-09-17 2010-09-17 Fixation des aubes avec dispositif de verrouillage pour aubes de turbines Not-in-force EP2478187B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10755152.5A EP2478187B1 (fr) 2009-09-17 2010-09-17 Fixation des aubes avec dispositif de verrouillage pour aubes de turbines

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09011885A EP2299060A1 (fr) 2009-09-17 2009-09-17 Fixation des aubes avec dispositif de verrouillage pour aubes de turbines
EP10755152.5A EP2478187B1 (fr) 2009-09-17 2010-09-17 Fixation des aubes avec dispositif de verrouillage pour aubes de turbines
PCT/EP2010/063701 WO2011033063A1 (fr) 2009-09-17 2010-09-17 Fixation d'aube avec dispositif de sécurité pour aubes de turbine

Publications (2)

Publication Number Publication Date
EP2478187A1 true EP2478187A1 (fr) 2012-07-25
EP2478187B1 EP2478187B1 (fr) 2013-07-03

Family

ID=41566145

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09011885A Withdrawn EP2299060A1 (fr) 2009-09-17 2009-09-17 Fixation des aubes avec dispositif de verrouillage pour aubes de turbines
EP10755152.5A Not-in-force EP2478187B1 (fr) 2009-09-17 2010-09-17 Fixation des aubes avec dispositif de verrouillage pour aubes de turbines

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09011885A Withdrawn EP2299060A1 (fr) 2009-09-17 2009-09-17 Fixation des aubes avec dispositif de verrouillage pour aubes de turbines

Country Status (4)

Country Link
US (1) US8956122B2 (fr)
EP (2) EP2299060A1 (fr)
CN (1) CN102498264B (fr)
WO (1) WO2011033063A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140199172A1 (en) 2013-01-11 2014-07-17 General Electric Company Turbomachine and method of handling turbomachine components
EP3048256A1 (fr) * 2015-01-20 2016-07-27 Siemens Aktiengesellschaft Rotor comportant une aube de turbine avec un dispositif de verrouillage
IT201600130088A1 (it) * 2016-12-22 2018-06-22 Nuovo Pignone Tecnologie Srl Pala di turbina e set di fissaggio
US10385874B2 (en) * 2017-05-08 2019-08-20 Solar Turbines Incorporated Pin to reduce relative rotational movement of disk and spacer of turbine engine
EP3650652B1 (fr) * 2018-11-08 2022-01-12 Doosan Skoda Power S.r.o. Fixation à un rotor de turbine d'une aube rotorique de turbine avec pied de sapin par une cale déformable et un élément de fixation
KR102400013B1 (ko) 2020-08-21 2022-05-18 두산에너빌리티 주식회사 터빈 블레이드의 씰 조립구조와 이를 포함하는 가스 터빈 및 터빈 블레이드의 씰 조립방법
KR102478172B1 (ko) * 2021-02-02 2022-12-14 두산에너빌리티 주식회사 회전 기계, 이를 포함하는 가스 터빈, 회전 기계의 조립 방법
KR102585387B1 (ko) * 2021-08-19 2023-10-05 두산에너빌리티 주식회사 블레이드 고정구조 및 이를 포함하는 로터, 압축기, 가스터빈, 블레이드 고정방법
JP7414941B1 (ja) 2022-11-29 2024-01-16 株式会社東芝 タービン動翼の固定構造

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Publication number Priority date Publication date Assignee Title
GB402061A (en) 1932-04-21 1933-11-21 Gen Electric Co Ltd Improvements in thermostatic switches
US2963271A (en) * 1956-07-19 1960-12-06 Gen Motors Corp Turbine blade locking
FR2323908A1 (fr) * 1975-09-11 1977-04-08 Alsthom Cgee Dispositif de blocage d'une piece montee dans une rainure
GB9223593D0 (en) * 1992-11-11 1992-12-23 Rolls Royce Plc Gas turbine engine fan blade assembly
DE4441233A1 (de) * 1994-11-19 1996-05-23 Abb Management Ag Beschaufelter Rotor
GB2410531B (en) 2004-01-29 2006-03-01 Rolls Royce Plc Fan blade disk assembly
EP1619354B1 (fr) 2004-07-22 2008-04-09 Siemens Aktiengesellschaft Dispositif pour fixer une aube à un disque rotorique de turbomachine, turbomachine et procédé pour le montage et démontage d'une aube au disque rotorique d'une turbomachine
EP1892380A1 (fr) * 2006-08-25 2008-02-27 Siemens Aktiengesellschaft Fixation d'aubes de turbine
EP1905957A1 (fr) * 2006-09-27 2008-04-02 Siemens Aktiengesellschaft Dispositif de fixation d'une aube de turbine
FR2915510B1 (fr) * 2007-04-27 2009-11-06 Snecma Sa Amortisseur pour aubes de turbomachines
EP2090750A1 (fr) 2008-02-14 2009-08-19 Siemens Aktiengesellschaft Rotor de turbomachine, aube rotorique pour un tel rotor de turbomachine, languette de calage et procédé d'assemblage associé
US9103221B2 (en) * 2012-02-16 2015-08-11 Alstom Technology Ltd System and method for blade retention

Non-Patent Citations (1)

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Title
See references of WO2011033063A1 *

Also Published As

Publication number Publication date
WO2011033063A1 (fr) 2011-03-24
EP2299060A1 (fr) 2011-03-23
CN102498264A (zh) 2012-06-13
CN102498264B (zh) 2015-02-25
US20120177499A1 (en) 2012-07-12
US8956122B2 (en) 2015-02-17
EP2478187B1 (fr) 2013-07-03

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