EP3064705B1 - Rotor doté d'une tôle de sûreté destiné à protéger un verrouillage rotatif contre le dévissage - Google Patents

Rotor doté d'une tôle de sûreté destiné à protéger un verrouillage rotatif contre le dévissage Download PDF

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Publication number
EP3064705B1
EP3064705B1 EP15157557.8A EP15157557A EP3064705B1 EP 3064705 B1 EP3064705 B1 EP 3064705B1 EP 15157557 A EP15157557 A EP 15157557A EP 3064705 B1 EP3064705 B1 EP 3064705B1
Authority
EP
European Patent Office
Prior art keywords
rotor
ring
securing
recess
bayonet
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.)
Active
Application number
EP15157557.8A
Other languages
German (de)
English (en)
Other versions
EP3064705A1 (fr
Inventor
Kevin KAMPKA
Karsten Kolk
Peter Schröder
Vyacheslav Veitsman
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 EP15157557.8A priority Critical patent/EP3064705B1/fr
Priority to CN201690000556.3U priority patent/CN208431036U/zh
Priority to US15/550,198 priority patent/US10641096B2/en
Priority to PCT/EP2016/050193 priority patent/WO2016139002A1/fr
Publication of EP3064705A1 publication Critical patent/EP3064705A1/fr
Application granted granted Critical
Publication of EP3064705B1 publication Critical patent/EP3064705B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
    • F01D5/066—Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps
    • 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
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/08—Heating, heat-insulating or cooling means
    • F01D5/081—Cooling fluid being directed on the side of the rotor disc or at the roots of the blades
    • F01D5/082—Cooling fluid being directed on the side of the rotor disc or at the roots of the blades on the side of the rotor disc
    • 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
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/08—Heating, heat-insulating or cooling means
    • F01D5/085—Heating, heat-insulating or cooling means cooling fluid circulating inside the rotor
    • F01D5/087—Heating, heat-insulating or cooling means cooling fluid circulating inside the rotor in the radial passages of the rotor disc
    • 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
    • F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates
    • 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
    • F01D5/3069—Fixing blades to rotors; Blade roots ; Blade spacers between two discs or rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
    • 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
    • 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
    • F05D2260/33—Retaining components in desired mutual position with a bayonet coupling
    • 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
    • F05D2260/96—Preventing, counteracting or reducing vibration or noise

Definitions

  • the present invention relates to a rotor, in particular a gas turbine rotor, having a plurality of rotor holes each having an axial passage opening, which are axially braced over at least one extending through the through holes tie rods and summarized to at least one rotor disk unit, wherein at the outer diameter of the tie rod at least one tie rod comprehensive support ring is present, which is engaged with an associated rotor disk and via which the tie rod is supported on the rotor disk, and wherein at least one securing ring is provided for the axial securing of the at least one support ring.
  • Such rotors which are composed of a plurality of individual rotor disks to form one or more rotor disk groups, are known in the prior art in a variety of configurations.
  • the rotor disks of each rotor disk unit are pressed flat against each other via the tie rod, wherein the pressing force is normally generated by nuts screwed onto the tie rod at the end.
  • Most directly arranged rotor disks are additionally connected to each other via a positive connection and centered.
  • a positive connection can be formed for example via a so-called Hirth toothing.
  • the rotor is exposed to mechanical vibrations whose frequency depends, inter alia, on the freely oscillating length of the tie rod.
  • mechanical vibrations whose frequency depends, inter alia, on the freely oscillating length of the tie rod.
  • With increasing length of a rotor and the free-running length of the tie rod increases, which causes its natural frequency shifts to a lower level near the rotational frequency of the rotor.
  • Such a frequency shift can Inadmissibly high vibration amplitudes entail, which impair the function of the rotor and can lead to damage.
  • the tie rod can be supported on the corresponding rotor disk.
  • the DE 2 643 886 a support ring in the form of a Stülprings before with expanding inner diameter, wherein the Stülpring engages with its free end of larger inner diameter in a provided on the associated rotor disc annular groove and is supported with the smallest inner diameter of the tie rod.
  • the present invention provides a rotor of the type mentioned, which is characterized in that the locking ring is secured by means of a rotational lock on the associated rotor disk and the support ring holds on this, wherein the locking ring secured using a lock plate against loosening is.
  • the support ring is therefore enclosed in the axial direction on the one hand by the rotor disk to which it is connected, and on the other by the securing ring which is fastened to the same rotor disk.
  • a distortion of the locking ring against the support ring on the tie rod is thus not required. Accordingly, the use of a dummy rotor disk can be omitted.
  • the locking plate with the locking ring and the associated rotor disk is engaged. In this way, a simple structure is achieved.
  • the securing ring for receiving the securing plate advantageously has a recess which extends in an L-shaped manner over an outer peripheral surface of the securing ring and an end face of the securing ring facing the associated rotor disk.
  • Such an L-shaped recess can be formed on a retaining ring with little effort - even subsequently - for example by means of milling and allows a fixation of the locking plate on the retaining ring.
  • This recess on the associated rotor disk can also be formed with little effort - even subsequently - for example by means of milling in the rotor disk. Their position also defines a measure of how far the circlip must be rotated relative to the associated rotor disk, in order to ensure the attachment of the circlip to the rotor disk.
  • the locking plate has a Z-shaped configuration and is received in the recess of the securing ring and the recess of the rotor disk.
  • an initially L-shaped locking plate is preferably inserted into an L-shaped recess of the securing ring, then the locking ring is brought into engagement with the associated rotor disk and fastened thereto by means of the rotary lock, whereupon the free leg accessible from the outside of the lock plate is bent into a recess of the rotor disk, resulting in the Z-shaped shape.
  • the twist lock is designed as a bayonet connection.
  • a screw connection as a rotary lock.
  • the circlip distributed along its circumference radially projecting bayonet projections which engage in a provided on the associated rotor disc annular bayonet groove, which is provided with corresponding to the bayonet projections bayonet projection receiving openings, which allow an axial insertion of the bayonet projections in the bayonet groove.
  • the recess of the securing ring divides one of the bayonet projections.
  • This embodiment of the recess of the locking ring ensures that the locking plate can not get out of the recess during rotation of the locking ring during assembly.
  • the recess can share one of the bayonet projections in the middle.
  • the support ring has a widening inner diameter and engages with its free end of larger inner diameter in a provided on the associated rotor disc annular groove.
  • the support ring for example, analogous to that in the DE 26 43 886 revealed be formed Stülpring.
  • the present invention relates to the use of a locking plate for securing a retaining ring, which holds a support ring with a rotor disk in engagement against loosening.
  • FIGS. 1 to 7 show a rotor according to an embodiment of the present invention.
  • the rotor 1 which in the present case forms a gas turbine rotor, comprises a multiplicity of rotor disks 3 each having an axial passage opening 2, a hollow shaft 4 and a tie rod 5 extending through the passage opening 2 and the hollow shaft 4, via which the rotor disks 3 and the hollow shaft 4 are clamped axially in a known manner using end to the tie rod 5 screwed clamping parts 6.
  • the rotor disks 3 are combined to form a compressor-side rotor disk unit 7 and a turbine-side rotor disk unit 8, wherein the hollow shaft 4 is arranged between the two rotor disk units 7 and 8.
  • the mutually facing end faces immediately adjacent rotor disks 3 are each provided with a Hirth not shown in detail, which also results in a positive connection between the adjacent rotor disks 3 and a centering with respect to the central axis M of the rotor 1 due to the tension by the tie rod 5 becomes.
  • blades 9 are arranged on the outer circumference of the respective rotor disks 3 .
  • existing gaps 10 serve to guide a cooling fluid for cooling the rotor disks 3, which is supplied via a formed between the tie rod 5 and the rotor disks 3 and the hollow shaft 4 cooling channel.
  • each support ring 11 has a widening inner diameter, wherein in each case the free end with the larger inner diameter engages in an annular groove 12 provided on the adjacently arranged rotor disk 3.
  • a securing ring 13 is provided, which is fastened in each case to that rotor disk 3 by means of a rotary lock, in which also the associated support ring 11 engages.
  • the securing ring 13 is designed such that it engages around an end face 14 of the associated support ring 11 facing away from the associated rotor disk 3.
  • Each retaining ring 13 is made in one piece of metal.
  • the rotational lock between the locking ring 13 and the rotor disk 3 is formed as a bayonet connection.
  • the securing ring 13 distributed along its circumference radially projecting bayonet projections 15 which engage in a provided on the associated rotor disk 3 annular bayonet 16, which is provided with corresponding to the bayonet projections 15 formed bayonet projection receiving openings 17, the axial insertion of the Allow bayonet projections 15 in the bayonet groove 16.
  • the retaining ring 13 can be pushed axially over the support ring 11, wherein the bayonet projections 15 are inserted into the associated bayonet projection receiving openings 17, whereupon the bayonet projections 15 are axially fixed in the bayonet groove 16 in the context of a rotational movement of the locking ring 13.
  • the locking ring 13 has an L-shaped recess 18 which extends over an outer peripheral surface of the locking ring 13 and one of the associated rotor disk 3 facing end face of the locking ring 13 and a bayonet projection 15 divides the center.
  • a bayonet projection 15 divides the center.
  • At the rotor disk 3 facing away from the end face of the locking ring 13 are radially opposite two receiving openings 19 are provided which can receive corresponding projections 20 of a locking tool 21.
  • a radially extending recess 22 is formed, the width of which corresponds substantially to the width of the recess 18 provided on the securing ring 13.
  • the recess 22 is positioned on the end face of the rotor disk 3 so that it is aligned with the recess 18 of the locking ring 13 when it is in a locking position.
  • a locking plate 23 is provided which prevents the intended assembled state loosening of the locking ring 13 from the locking position.
  • the locking plate 23 has a Z-shaped configuration and is received in the recess 18 of the securing ring 13 and the recess 22 of the rotor disk 3.
  • the width of the securing plate 23 substantially corresponds to the widths of the recess 18 and the recess 22.
  • the securing ring 13 For mounting of the securing ring 13, first the securing ring 13 is slipped over the tie rod 5, so that it surrounds the support ring 11. Then in the preassembled state, first L-shaped locking plate 23 is inserted into the L-shaped recess 18 of the securing ring 13. Subsequently, the securing ring 13 provided with the securing plate 23 is inserted axially into the bayonet groove 16 of the rotor disk 3, wherein the bayonet projections 15 are inserted into the corresponding bayonet projection receiving openings 17.
  • a significant advantage of the securing ring 13 according to the invention is that it is not clamped over the tie rod 5 against the associated support ring 11, which is why support rings 11 can be mounted easily and inexpensively regardless of their position. Retrofitting is possible without much effort. Due to its simple structure, the retaining ring 13 can also be produced inexpensively.
  • the use of a locking plate 23 to secure the locking ring 13 against loosening also offers the advantage that during assembly neither forces on the rotor disk 3 nor on the retaining ring 13 forces are exerted whereby unwanted deformations and / or cracking can be avoided. Also, the arrangement can be dismantled easily, which is for maintenance or repair of advantage.
  • the necessary recesses 18 or recesses 22 can also subsequently be easily introduced into retaining rings 13 and rotor disks 3, so that existing anti-loosening devices can be replaced by an anti-rotation lock according to the invention.

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

Claims (10)

  1. Rotor (1), notamment rotor d'une turbine à gaz, comprenant plusieurs disques (3) rotoriques, qui ont une ouverture (2) axiale de passage, qui sont serrés axialement par au moins un tirant (5) passant dans les ouvertures (2) de passage et qui sont rassemblés en au moins une unité (7) de disques rotoriques,
    dans lequel, sur le diamètre extérieur du tirant (5), s'applique au moins un anneau (11) d'appui, qui entoure le tirant (5), qui est en prise avec un disque (3) rotorique associé et par lequel le tirant (5) s'appuie sur le disque (3) rotorique et
    dans lequel il est prévu, pour la fixation axiale du au moins un anneau (11) d'appui, au moins un anneau (13) de fixation,
    caractérisé en ce que
    l'anneau de fixation est fixé au moyen d'un verrouillage en rotation au disque (3) rotorique associé et maintient l'anneau (11) d'appui sur celui-ci,
    l'anneau (13) de fixation étant empêché de tourner librement en utilisant une tôle (23) de fixation.
  2. Rotor suivant la revendication 1,
    caractérisé en ce que
    la tôle (23) de fixation est en prise avec l'anneau (13) de fixation et avec le disque (3) rotorique associé.
  3. Rotor suivant l'une des revendications précédentes,
    caractérisé en ce que
    l'anneau (13) de fixation a un creux (18), qui reçoit la tôle (23) de fixation et qui s'étend en forme de L sur une surface périphérique extérieure de l'anneau (13) de fixation et sur une surface frontale, tournée vers le disque (3) rotorique associé, de l'anneau (13) de fixation.
  4. Rotor suivant l'une des revendications précédentes,
    caractérisé en ce que
    le disque (3) rotorique associé a, sur une surface frontale extérieure, un évidement (22), s'étendant radialement, de réception de la tôle (23) de fixation, qui est placé de manière à être aligné avec le creux (18) de la tôle (13) de fixation lorsque celle-ci est dans une position de verrouillage.
  5. Rotor suivant l'une des revendications 3 ou 4,
    caractérisé en ce que
    la tôle (23) de fixation a une conformation en forme de Z et est reçue dans le creux (18) de l'anneau (13) de fixation et dans l'évidement (22) du disque (3) rotorique associé.
  6. Rotor suivant l'une des revendications précédentes,
    caractérisé en ce que
    le verrouillage en rotation est constitué en liaison à baïonnette.
  7. Rotor suivant la revendication 6,
    caractérisé en ce que
    l'anneau (13) de fixation a des saillies (15) de baïonnette s'étendant radialement d'une manière répartie sur son pourtour et pénétrant dans une rainure (16) de baïonnette de forme annulaire, prévue sur le disque (3) rotorique associé, rainure qui est pourvue d'ouvertures (17) de réception de saillie de baïonnette, constituées de manière correspondante aux saillies (15) de baïonnette, ouvertures qui permettent une insertion axiale des saillies (15) de baïonnette dans la rainure (16) de baïonnette.
  8. Rotor suivant l'une des revendications 6 ou 7,
    caractérisé en ce que
    l'évidement (18) de l'anneau (13) de fixation sépare, notamment au milieu, l'une des saillies (15) de baïonnette.
  9. Rotor suivant l'une des revendications précédentes,
    caractérisé en ce que
    l'anneau (11) d'appui a un diamètre intérieur qui s'agrandit et
    en ce que l'anneau (11) d'appui pénètre, par son extrémité libre de diamètre plus grand, dans une rainure (12) annulaire prévue sur le disque (3) rotorique associé.
  10. Utilisation d'une tôle (23) de fixation pour empêcher de tourner librement un anneau (13) de fixation, qui maintient un anneau (11) d'appui en prise avec un disque (3) rotorique associé.
EP15157557.8A 2015-03-04 2015-03-04 Rotor doté d'une tôle de sûreté destiné à protéger un verrouillage rotatif contre le dévissage Active EP3064705B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15157557.8A EP3064705B1 (fr) 2015-03-04 2015-03-04 Rotor doté d'une tôle de sûreté destiné à protéger un verrouillage rotatif contre le dévissage
CN201690000556.3U CN208431036U (zh) 2015-03-04 2016-01-07 具有用于防止旋转锁旋松的锁定板的转子
US15/550,198 US10641096B2 (en) 2015-03-04 2016-01-07 Rotor with a locking plate for securing an antirotation lock against unscrewing
PCT/EP2016/050193 WO2016139002A1 (fr) 2015-03-04 2016-01-07 Rotor présentant une plaque d'arrêt pour la protection contre le desserrage d'un verrouillage rotatif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15157557.8A EP3064705B1 (fr) 2015-03-04 2015-03-04 Rotor doté d'une tôle de sûreté destiné à protéger un verrouillage rotatif contre le dévissage

Publications (2)

Publication Number Publication Date
EP3064705A1 EP3064705A1 (fr) 2016-09-07
EP3064705B1 true EP3064705B1 (fr) 2017-11-01

Family

ID=52596843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15157557.8A Active EP3064705B1 (fr) 2015-03-04 2015-03-04 Rotor doté d'une tôle de sûreté destiné à protéger un verrouillage rotatif contre le dévissage

Country Status (4)

Country Link
US (1) US10641096B2 (fr)
EP (1) EP3064705B1 (fr)
CN (1) CN208431036U (fr)
WO (1) WO2016139002A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2933432A1 (fr) * 2014-04-15 2015-10-21 Siemens Aktiengesellschaft Rotor doté d'une bague d'appui bloquée axialement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE534314A (fr) * 1953-12-24
DE2643886C2 (de) 1976-09-29 1978-02-09 Kraftwerk Union AG, 4330 Mülheim Gasturbinentäufer in Scheibenbauart
US4558988A (en) * 1983-12-22 1985-12-17 United Technologies Corporation Rotor disk cover plate attachment
US6575703B2 (en) * 2001-07-20 2003-06-10 General Electric Company Turbine disk side plate
RU2230195C2 (ru) * 2002-05-30 2004-06-10 Открытое акционерное общество "Авиадвигатель" Ротор многоступенчатой турбины
US8979502B2 (en) * 2011-12-15 2015-03-17 Pratt & Whitney Canada Corp. Turbine rotor retaining system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US10641096B2 (en) 2020-05-05
EP3064705A1 (fr) 2016-09-07
US20180023394A1 (en) 2018-01-25
WO2016139002A1 (fr) 2016-09-09
CN208431036U (zh) 2019-01-25

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