EP3167163B1 - Agencement de disque de rouet - Google Patents

Agencement de disque de rouet Download PDF

Info

Publication number
EP3167163B1
EP3167163B1 EP15778914.0A EP15778914A EP3167163B1 EP 3167163 B1 EP3167163 B1 EP 3167163B1 EP 15778914 A EP15778914 A EP 15778914A EP 3167163 B1 EP3167163 B1 EP 3167163B1
Authority
EP
European Patent Office
Prior art keywords
wheel disk
bolt
sealing plate
latching
disk arrangement
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.)
Not-in-force
Application number
EP15778914.0A
Other languages
German (de)
English (en)
Other versions
EP3167163A1 (fr
Inventor
Harald Hoell
Kevin KAMPKA
Karsten Kolk
Marc Lange
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
Publication of EP3167163A1 publication Critical patent/EP3167163A1/fr
Application granted granted Critical
Publication of EP3167163B1 publication Critical patent/EP3167163B1/fr
Not-in-force 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements
    • F01D11/006—Sealing the gap between rotor blades or blades and rotor
    • 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
    • F01D5/02—Blade-carrying members, e.g. rotors
    • 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
    • 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
    • F05D2220/32—Application in turbines in gas 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
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • 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
    • F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking

Definitions

  • the present invention relates to a wheel disc assembly having a wheel disc, a plurality of blade devices, which are fixed along an outer circumference of the wheel disc, at least one sealing plate, which is slidably received between the wheel disc and the blade means in the circumferential direction, and at least one securing device, which are designed such that it secures the sealing plate against displacement in the circumferential direction.
  • Wheel disc assemblies of the type mentioned are known in the art. They form components of rotors, such as gas turbine rotors or the like. Normally, a plurality of sealing plates are slidably received in the circumferential direction between the wheel disc and the blade means. Thus, the sealing plates can be used for example in radially spaced-apart annular grooves, which are formed on the wheel disc on the one hand and on the blade means on the other. In order to ensure proper functioning of the sealing plates, it is necessary to secure the individual sealing plates against displacement in the circumferential direction, for which corresponding securing devices are used.
  • Such a securing device can be formed, for example, by a screw extending through a passage opening provided in the sealing plate and a threaded bore provided on the wheel disc or on a blade device into which the screw is screwed in the intended mounted state.
  • a problem of a safety device designed in this way is that the notch effect associated with the threaded bore provided in the wheel disc or in the blade device has a negative effect on the strength of the wheel disc or the blade device and can cause corresponding problems.
  • screws can often no longer be solved in case of service, resulting in a complicated boring of the screw by itself, whereby the wheel disc or the blade device and thus an expensive component is damaged.
  • From the EP 2 218 873 A1 is another embodiment of a sealing plate locking known.
  • a breakthrough in the form of a keyhole is present in the sealing plate, wherein a blind hole is mounted therein for engagement of a locking pin in the wheel disc.
  • the locking pin here also has a radially projecting cam, which is axially secured by inserting the locking pin through the keyhole by turning.
  • the present invention provides a Radterionan extract of the aforementioned type, wherein the securing means comprises a provided by a provided in the sealing plate through hole bolts and provided on the wheel disc or on a blade means recess which receives the free end of the bolt and whose wall limits movement of the bolt in the circumferential direction, and wherein the bolt is secured in the axial direction by a latching connection against accidental release on the sealing plate.
  • the bolt of the safety device according to the invention is not bolted to the wheel or a blade device in contrast to the prior art described above but is held directly or indirectly via a latching connection to the sealing plate, it is prevented that the strength of the wheel or the Schaufel issued herabge by the notch effect of a thread is set. Furthermore, the bolt can be quickly and easily installed and dismantled thanks to the locking connection. Even if the locking connection would have to be drilled in the individual case lack of solubility, drilling only affects the bolt and the sealing plate and no expensive component such as the wheel or the blade device, which has a positive effect on maintenance costs.
  • the recess is formed as extending transversely to the circumferential direction extending slot.
  • manufacturing tolerances, thermal expansion or the like can be easily compensated because the bolt can move in the radial direction within the recess.
  • the latching connection comprises at least one latching recess and at least one latching projection, which engage in each other in the radial direction.
  • the at least one latching recess is annular, whereby a simple and inexpensive to manufacture structure is achieved.
  • two locking projections arranged radially opposite each other are provided, whereby a very reliable latching connection is achieved.
  • At least one actuating element operable manually or using a tool for releasing the latching connection is provided on the bolt. In this way, a simple manual release of the locking connection is ensured.
  • the at least one actuating element is designed as an axially outwardly projecting spring arm, wherein the number of actuating elements advantageously corresponds to the number of latching projections.
  • the locking connection between the bolt and the sealing plate is provided, resulting in a structure with only a few individual components.
  • the latching connection between the bolt and a sleeve is provided, which is inserted captive into the passage opening provided in the sealing plate.
  • a sleeve has the Advantage that it can be replaced in case of service in a simple manner without great expense.
  • FIGS. 1 to 3 show a section of a wheel disc assembly 1 according to a first embodiment of the present invention.
  • the wheel disc assembly 1 comprises a wheel disc 2, a plurality of blade devices, not shown, which are attached along an outer periphery of the wheel disc 2, and a plurality of sealing plates 3, which extend between the wheel disc 2 and the blade means and are slidably received in the circumferential direction U. More specifically, the sealing plates 3 are inserted in annular grooves which are arranged spaced apart in the radial direction R, wherein the annular grooves are formed on the wheel disc 2 on the one hand and on the blade means on the other. In FIG. 1 only the formed on the wheel disc 2 undercut annular groove 4 is shown, are used in the formed on the radially inwardly facing edges of the sealing plates 3 beads 5.
  • the wheel disc assembly 1 comprises a plurality of securing devices 6.
  • Each securing device 6 has a bolt 8 extending through a through opening 7 provided in a sealing plate 3 and a recess 9 provided on the wheel disc 2 , which receives the free end of the bolt 8.
  • the bolt 8 is secured in the axial direction A by a latching connection 10 against unintentional release on the sealing plate 3.
  • the passage opening 7 has two coaxial sections with different diameters D 1 and D 2 in the axial direction, the diameter D 1 of that section facing the recess 9 being greater than the diameter D 2 of the section facing away from the recess 9. Accordingly, a detent recess 11 is defined between the sections.
  • the bolt 8 comprises a cylindrical bolt head 12, to which two radially connecting opposing and axially extending actuators 13 in the form of spring arms.
  • each locking projection 14 on its side facing the bolt head 12 has a tapered surface 15, the diameter of which tapers to produce an insertion aid in the direction of the bolt head 12.
  • the position of the locking projections 14 is selected such that they are moved towards each other when the actuating elements 13 are compressed.
  • the recess 9 is formed as extending in the radial direction R elongated hole.
  • the width B of the oblong hole is selected to be slightly larger than the diameter of the bolt head 12, so that the bolt head 12 can be inserted into the recess 9. However, a movement of the bolt head 12 and thus of the bolt 8 in the circumferential direction U is limited.
  • the length L of the slot is greater than its width B, so that the bolt head 12 in the radial direction R is movable within the recess 9 to compensate for thermal expansion or the like.
  • the through hole 7 and the recess 9 are brought into coincidence with each other in a first step by the sealing plate 3 is moved in the circumferential direction U accordingly.
  • the bolt 8 is inserted with the bolt head 12 ahead in the through hole 7 until the tapered surfaces 15 of the locking projections 14 with the smaller diameter D2 defining edge of the through hole 7 come into contact.
  • the actuating elements 13 projecting outward from the sealing plate 3 must be compressed only manually or using a suitable tool, whereupon the pin 8 can be removed from the passage opening 7.
  • FIGS. 4 to 6 show a wheel disc assembly 16 according to a second embodiment of the present invention.
  • the wheel disc assembly 16 includes a wheel disc 17, a plurality of blade devices, not shown, which are attached along an outer circumference of the wheel disc 17, and a plurality of sealing plates 18 which extend between the wheel disc 17 and the blade means and are slidably received in the circumferential direction U. More specifically, the sealing plates 18 are inserted into annular grooves which are arranged spaced apart in the radial direction R, wherein the annular grooves are formed on the wheel disc 17 on the one hand and on the blade means on the other. In FIG. 4 only the formed on the wheel disc 17 undercut annular groove 19 is shown, in which at the radially inwardly facing edges of the sealing plates 18 formed beads 20 are used.
  • the wheel disc assembly 1 comprises a plurality of securing devices 21.
  • Each securing device 21 has a sleeve 23 extending through a through opening 22 provided in a sealing plate 18, a pin 24 extending through the sleeve 23 and a provided on the wheel disc 17 recess 25 which receives the free end of the pin 24.
  • the passage opening 22 is divided in the axial direction into two coaxial sections having different diameters D 3 and D 4 , the diameter D 3 of that section facing the recess 25 being greater than the diameter D 4 of the section facing away from the recess 25. Accordingly, a paragraph 26 is defined between the sections.
  • the smaller hole with the diameter D 4 are drilled through, while the larger hole with the diameter D 3 is only lowered.
  • the outer contour of the sleeve 23 is formed corresponding to the contour of the passage opening 22. Accordingly, the sleeve at its recess 25 facing the free end on a radially outwardly projecting and annular retaining projection 27 which defines a stop. At the opposite free end of the inner wall of the sleeve 23 defines an insertion cone 28 which is provided with an annular circumferential recess recess 29.
  • the bolt 24 comprises a cylindrical bolt head 30, to which two radially opposite and substantially in the axial direction A extending actuating elements 31 in the form of spring arms join, which widen in the radial direction R conically corresponding to the insertion cone 28 of the sleeve 23.
  • actuating elements 31 in the form of spring arms join, which widen in the radial direction R conically corresponding to the insertion cone 28 of the sleeve 23.
  • radially opposing and outwardly projecting locking projections 32 are provided in the transition region between the bolt head 30 and the actuators 31 .
  • the position of the latching projections 32 is selected such that they are moved towards each other when the actuators 31 are compressed.
  • the recess 25 is formed analogous to the recess 9 of the wheel disc assembly 1 according to the first embodiment described above, which is why at this point a further description is omitted.
  • the sleeve 23 is inserted from behind into the through hole 22 of the sealing plate 18 in a first step until it abuts the sealing plate 18. Then, the passage opening 22 is brought into coincidence with the recess 25 by the sealing plate 18 is moved in the circumferential direction U accordingly. Subsequently, the bolt 24 is inserted with the bolt head 30 ahead in the sleeve 23 until the locking projections 32 of the bolt 24 snaps into the associated latching recess 29 of the sleeve 23. The latching connection produced thereby secures the bolt 24 in the axial direction A, as in FIG. 4 is shown. Also, the sealing plate 18 is secured thanks to the recorded in the recess 25 bolt head 30 against movement in the circumferential direction U.
  • the actuating elements 31 projecting outward from the sealing plate 18 must be compressed only manually or using a suitable tool, whereupon the bolt 24 can be removed from the sleeve 23.
  • a significant advantage of the above-described securing devices 6, 21 of the Radularnan extract 1, 16 is that they secure the sealing plates 3, 18 in a simple manner against movement in the circumferential direction U, without affecting the strength of the wheel discs 2, 17 by notch effect become. It should be noted at this point that the recesses 9, 25 according to the invention can alternatively or additionally also be provided on blade devices, even if this is not shown in the present case.
  • the securing devices 6, 21 are also advantageous in terms of their simple structure and in terms of their ease of assembly and disassembly.

Landscapes

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

Claims (11)

  1. Agencement (1; 16) à disque de roue, comprenant un disque (2; 17) de roue,
    plusieurs dispositifs d'aube, qui sont fixés sur un pourtour extérieur du disque (2; 17) de roue,
    au moins une tôle (3; 18) d'étanchéité, qui est reçue de manière à pouvoir se déplacer dans la direction périphérique entre le disque (2; 17) de roue et les dispositifs d'aube et
    au moins un dispositif (6; 21) de blocage, constitué de manière à empêcher la tôle (3; 18) d'étanchéité de se déplacer dans la direction périphérique,
    dans lequel
    le dispositif (6; 21) de blocage a un axe (8; 24) passant dans une ouverture (7; 22) de passage prévue dans la tôle (3; 18) d'étanchéité et une cavité (9; 25), qui est prévue sur le disque (2; 17) de roue ou sur un dispositif d'aube, qui reçoit l'extrémité libre de l'axe (8; 24) et dont la paroi limite un déplacement de l'axe (8; 24) dans la direction périphérique,
    caractérisé en ce que
    l'axe (8; 24) est empêché de se détacher intempestivement de la tôle (3; 18) d'étanchéité, dans la direction axiale, par une liaison par encliquetage.
  2. Agencement (1; 16) à disque de roue suivant la revendication 1,
    caractérisé en ce que
    la cavité (9; 25) est constituée sous la forme d'une boutonnière s'étendant transversalement à la direction périphérique.
  3. Agencement (1; 16) à disque de roue suivant l'une des revendications précédentes,
    caractérisé en ce que
    la liaison par encliquetage comprend au moins un creux (10; 29) d'encliquetage et au moins une saillie (14; 32) d'encliquetage, qui pénètrent l'une dans l'autre dans la direction radiale.
  4. Agencement (1; 16) à disque de roue suivant la revendication 3,
    caractérisé en ce que le au moins un creux d'encliquetage est annulaire (10; 29).
  5. Agencement (1; 16) à disque de roue suivant la revendication 3 ou 4,
    caractérisé en ce qu'
    il est prévu deux saillies (14; 32) d'encliquetage opposées radialement l'une à l'autre.
  6. Agencement (1; 16) à disque de roue suivant l'une des revendications 3 à 5,
    caractérisé en ce qu'
    il est prévu, pour le désencliquetage sur l'axe (8; 24) au moins un élément (13; 31) d'actionnement pouvant être actionné manuellement ou en utilisant un outil.
  7. Agencement (1; 16) à disque de roue suivant la revendication 6,
    caractérisé en ce que
    le au moins un élément (13; 31) d'actionnement est constitué sous la forme d'un bras de ressort en saillie axialement vers l'extérieur.
  8. Agencement (1; 16) à disque de roue suivant la revendication 6 ou 7,
    caractérisé en ce que
    le nombre des éléments (13, 31) d'actionnement correspond au nombre des saillies (14; 32) d'encliquetage.
  9. Agencement (1) à disque de roue suivant l'une des revendications précédentes,
    caractérisé en ce que
    la liaison par encliquetage est prévue entre l'axe (8) et la tôle (3) d'étanchéité.
  10. Agencement (16) à disque de roue suivant l'une des revendications 1 à 8,
    caractérisé en ce que
    la liaison par encliquetage est prévue entre l'axe (24) et une douille (23), qui est insérée, sans possibilité de se perdre, dans l'ouverture (22) de passage prévue dans la tôle (18) d'étanchéité.
  11. Agencement (16) à disque de roue suivant la revendication 10,
    caractérisé en ce que
    la douille (23) a, à l'extrémité libre tournée vers la cavité (25), au moins une butée, qui est en saillie radialement et qui s'appuie dans la direction axiale sur la tôle (3; 18) d'étanchéité.
EP15778914.0A 2014-10-30 2015-10-08 Agencement de disque de rouet Not-in-force EP3167163B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14191068.7A EP3015656A1 (fr) 2014-10-30 2014-10-30 Agencement de disque de roue
PCT/EP2015/073261 WO2016066394A1 (fr) 2014-10-30 2015-10-08 Agencement de disque de roue

Publications (2)

Publication Number Publication Date
EP3167163A1 EP3167163A1 (fr) 2017-05-17
EP3167163B1 true EP3167163B1 (fr) 2018-07-11

Family

ID=51845312

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14191068.7A Withdrawn EP3015656A1 (fr) 2014-10-30 2014-10-30 Agencement de disque de roue
EP15778914.0A Not-in-force EP3167163B1 (fr) 2014-10-30 2015-10-08 Agencement de disque de rouet

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14191068.7A Withdrawn EP3015656A1 (fr) 2014-10-30 2014-10-30 Agencement de disque de roue

Country Status (3)

Country Link
US (1) US20170241284A1 (fr)
EP (2) EP3015656A1 (fr)
WO (1) WO2016066394A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2933436A1 (fr) * 2014-04-15 2015-10-21 Siemens Aktiengesellschaft Disque de roue doté d'au moins une tôle d'étanchéité
EP2975219A1 (fr) * 2014-07-17 2016-01-20 Siemens Aktiengesellschaft Assemblage de disque de roue
EP3564489A1 (fr) * 2018-05-03 2019-11-06 Siemens Aktiengesellschaft Rotor à surfaces de contact optimisées au niveau de forces centrifuges

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3501249A (en) * 1968-06-24 1970-03-17 Westinghouse Electric Corp Side plates for turbine blades
GB2043796B (en) * 1979-03-10 1983-04-20 Rolls Royce Bladed rotor for gas turbine engine
US5014934A (en) * 1989-06-30 1991-05-14 The Boeing Company Removable seal for discontinuities in aircraft skin
US5277548A (en) * 1991-12-31 1994-01-11 United Technologies Corporation Non-integral rotor blade platform
EP2218873A1 (fr) * 2009-02-17 2010-08-18 Siemens Aktiengesellschaft Section de rotor pour un rotor d'une turbomachine, aube directrice pour une turbomachine et élément de blocage
US8459953B2 (en) * 2010-01-19 2013-06-11 General Electric Company Seal plate and bucket retention pin assembly
US9097270B2 (en) * 2013-07-26 2015-08-04 GM Global Technology Operations LLC Snap fit fastener

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
US20170241284A1 (en) 2017-08-24
EP3167163A1 (fr) 2017-05-17
EP3015656A1 (fr) 2016-05-04
WO2016066394A1 (fr) 2016-05-06

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