EP1564372B1 - Turbinenrotorscheibe mit einer Auswuchteinrichtung - Google Patents

Turbinenrotorscheibe mit einer Auswuchteinrichtung Download PDF

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Publication number
EP1564372B1
EP1564372B1 EP05100778.9A EP05100778A EP1564372B1 EP 1564372 B1 EP1564372 B1 EP 1564372B1 EP 05100778 A EP05100778 A EP 05100778A EP 1564372 B1 EP1564372 B1 EP 1564372B1
Authority
EP
European Patent Office
Prior art keywords
rim
rotor disk
disk according
housings
bladed rotor
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.)
Expired - Lifetime
Application number
EP05100778.9A
Other languages
English (en)
French (fr)
Other versions
EP1564372A1 (de
Inventor
Jean-Louis Bertrand
Frédéric Paul Eichstadt
Joel Mathieu
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.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA SAS
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 SNECMA SAS filed Critical SNECMA SAS
Publication of EP1564372A1 publication Critical patent/EP1564372A1/de
Application granted granted Critical
Publication of EP1564372B1 publication Critical patent/EP1564372B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F01D5/027—Arrangements for balancing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/50—Vibration damping features

Definitions

  • the present invention relates to the technical field of turbomachine rotors.
  • the patent US 3,888,601 describes a turbomachine equipped with a balancing device. It discloses a rotor disc provided at its periphery with blades. Each blade has a blade, a foot and a platform placed between the blade and the foot. On its periphery, the disk has grooves arranged in an axial direction, each designed to receive the foot of a blade. When a blade is installed on the disk, its platform protrudes laterally on each side of the disk. Hooks formed integrally with the disc are circumferentially disposed on one side of the disc, spaced apart from each other. They comprise two opposite side walls and oriented radially in coplanar alignment with the side walls of the blade mounting grooves.
  • the balancing of the disk or rotor is achieved by means of balancing masses comprising a body main and two tabs opposite to each other to be inserted each between the two arms of a hook.
  • the blades are introduced into their respective grooves of the disk.
  • Each balancing mass is then inserted so as to insert its tongues in a hook of the disc, sliding it against the disc in a radial direction directed outwards, until it abuts against a flat plate. Dawn shape.
  • the balancing masses thus installed are then immobilized: their axial displacement is prevented by their tongues retained in a hook, their radial outward movement is prevented by the platform which forms a stop, and their radial displacement towards the inside. is prevented by an elastic retaining ring which is placed against the corresponding face of the disc. To replace the balancing masses, the elastic retaining ring is removed, the masses are removed, and new masses are installed in their place.
  • the balancing device which has just been described has a disadvantage in that it is not suitable for a rotor disk of the monobloc blisk type. It presents another drawback in that this arrangement of balancing weights of the disk considerably increases the axial dimension of the disk. Indeed, to the axial dimension of the disc is added the thickness of the hooks, the size of the masses and that of the overhanging platforms. As a result, in the presence of a set of several disks, the size of the turbomachine in an axial direction can become excessive.
  • Licences US 4,848,182 and US 4,926,710 describe a method and system for balancing multidisc rotor with integral blading.
  • a balancing ring is shrink-fitted to a disk such that its peripheral surface is in contact with a contact face of the disk which is on one side of the disk and radially inwardly thereof.
  • the ring abuts laterally towards the inside of the disc against a lip of the disc which rises radially outwardly from the contact face. It is retained laterally towards the outside of the disc by means of an elastic retaining ring.
  • the ring On its outer periphery, the ring has teeth extending radially outwardly which are separated by openings.
  • the ring When the ring is attached to the disc, its teeth are against the contact face of the disc. As a result, the apertures form circumferentially distributed cavities with the contact face and the lip of the disc, which open laterally towards the outside of the disc.
  • Several disks each equipped with their balancing ring are assembled together to form the rotor.
  • the method of balancing the disk or the rotor consists of inserting balancing masses in some of the cavities which are distributed circumferentially. The balancing masses are retained laterally towards the outside of the disc by the retaining ring elastic, to prevent them from coming out of their cavity.
  • the balancing device which has just been described has a drawback in that the balancing masses are installed on a balancing ring. This requires the presence of a ring and a setting operation by hooping this balancing ring on the disk.
  • the invention relates to a monobloc bladed rotor disc, the disc having a rim and a balancing device comprising housings formed in said rim and balance weights housed in said housings.
  • the housings do not cross the rim, and are in the form of blind holes whose opening opens on a side face of the rim, or these housing cross the rim and their orifices open on a first and a second opposite side faces of the rim.
  • these housings are located in a side face of the rim, under a disk platform which supports the blades, and are distributed on the circumference of the rim.
  • the housings and the weights have a shape adapted to prevent rotation or tilting of each weight in its respective housing.
  • the balancing device further comprises one or two ring (s) stop (s), intended (s) to be positioned laterally against the rim, so as to seal at least partially the corresponding holes of the housing.
  • the snap ring seals at least half of the orifices.
  • the snap ring completely closes the orifices. In order to prevent axial rotation of the snap ring, it comprises at least one protuberance intended to fit into one of the housings.
  • the balancing device comprises one or two circumferential slot (s) provided under the platform intended to receive a peripheral slice of a snap ring.
  • the invention relates to a blisk rotor disc, which is equipped with a balancing device according to the first aspect of the invention.
  • the invention relates to a rotor, which comprises at least one disk according to the second aspect of the invention.
  • An advantage of the balancing device according to the invention lies in the fact that the housing of the flyweights are an integral part of the rim, which avoids having recourse to an additional piece intended to receive balancing weights. he This results in a reduction of manufacturing costs and the assembly time of the rotors.
  • Another advantage of the balancing system of the invention lies in the fact that the weights thus placed are easily accessible, and that it is possible to modify the balance of the disks or rotor by changing the distribution of balancing weights , without having to disassemble the entire rotor.
  • Another advantage lies in the fact that it is possible, with such a balancing device, to improve the correction of rotor unbalances.
  • a rotor 10 comprising six disks 12, 14.
  • three of the disks (on the right in the figure) are disks 12 each having removable vanes 16 affixed to the rim 18 of the rotor. disk.
  • the other three discs (on the left in the figure) are monoblock bladed disks 14, each having vanes 20 made in one piece with the rim 18 of the disc.
  • FIG. 2 to 4 On the Figures 2 to 4 is illustrated a monobloc blisk 14 having a rim 18 and vanes 20 made in one piece with the rim 18.
  • a connecting flange 24 On the figure 2 is shown a connecting flange 24, intended to assemble the disc 14 with an adjacent disc (not shown), which is fixed to the disc 14 by fastening means such as for example screws through a hole 26 of the rim and a bore 28 of the connecting flange 24.
  • the rim 18 is a zone of greater thickness of which a radially outward facing face serves as a platform 32 from which the vanes 20 extend radially outwards.
  • housing 36 which are circumferentially distributed on the rim 18. According to a first embodiment of the balancing device of the invention, these housings 36 are in the form of blind holes opening onto a single side face 180 of the rim 18.
  • balancing weights 40 are placed in the housings 36. According to the needs appearing during the balancing process, a weight 40 is placed in certain housings 36 and no weights 40 in d other dwellings 36.
  • the housings 36 have, in the axial plane and / or in the transverse plane, a substantially rectangular section with rounded corners.
  • the weights 40 have substantially a rectangular parallelepiped shape whose dimensions correspond to those of the housing 36, so that each weight 40 fits into its housing 36 without being able to move in rotation therein.
  • the edges of the rectangular parallelepiped are cut in such a way as to form additional facets on the weight 40, in order to further limit any rotational or tilting movements of the weight 40 in its housing 36.
  • the zone of the rim 18 situated between the platform 32 and the recesses 36 is slightly overhanging with respect to the recesses 36.
  • the rim 18 presents a circumferential slot 42, which is arranged in a face substantially opposite to the platform 32, and which runs along the housing 36.
  • a stop ring 44 which has a width such that it closes at least partially the housing 36 so as to retain the weights 40.
  • the snap ring 44 is cut transversely, so that it can be installed and removed easily.
  • the snap ring 44 has an anti-rotation member 46 to prevent its rotation in the transverse plane when it is installed in the slot 42 of the rim 18.
  • This anti-rotation member is embodied, for example, by a protuberance 46 of the snap ring 44 which fits into one of the housings 36 which is not occupied by a counterweight 40 ( figure 3 ).
  • the figure 5 illustrates in front view and partially and enlarged housing 36.
  • the snap ring 44 substantially closes half of the housing 36. It could be envisaged that the snap ring 44 closes the two-thirds housing 36, or all of the housings 36. In order to prevent the flyweights 40 from being able to move out of the housings 36, it is preferred for the snap ring to cover at least half of the housings 36.
  • weights 40 it is possible, according to an additional embodiment, to fix the weights 40 in the housing 36 by depositing a small amount of adhesive at the bottom of the housing before install the weight 40.
  • the housings 38 are in the form of through holes which open on either side of the rim 18.
  • these housings 38 have a first cavity 382 similar to the housings 36 of the first embodiment and which opens onto a first side face 182 of the rim 18. They also have a second cavity 384 substantially symmetrical to the first cavity 382 with respect to a median plane of the rim 18, and which opens onto a second side face 184 of the rim 18, opposite to its first side face 182.
  • the two cavities 382, 384 are interconnected by an intermediate channel 386, which has, in the example shown, a smaller section than the respective sections of the two cavities 382, 384.
  • balancing weights 40 are placed in some of the first cavities 382, and a first locking ring 442 is installed in a first slot 422 formed in a first portion that is above the first face 182 of the rim 18, so as to close at least partially the first cavities 382 and retain the weights 40.
  • sealing flanges 48 are provided to seal the disc 14. They are preferably placed at the bottom of the second cavities 384, and cut off any communication between the second cavities and the intermediate channels 386 of lesser section.
  • a second snap ring 444 is installed in a second slot 424 formed in a second portion that is overhanging with respect to the second face 184 of the rim 18, so as to close at least partially the second cavities 384 and to retain the flanges. 48.
  • the first snap ring 442, respectively the second snap ring 444, is preferably cut transversely, so that it can be installed and removed easily.
  • the first retaining ring 442 respectively the second retaining ring 444, has an anti-rotation member (not shown), similar to that of the retaining ring 44 according to the first embodiment of the device.

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

Claims (17)

  1. Einteilige beschaufelte Rotorscheibe (1), umfassend
    - eine Felge (18), die mit einer ersten und mit einer zweiten Seitenfläche, welche gegenüberliegend sind, versehen ist,
    - Schaufeln (20),
    - eine Auswuchtvorrichtung,
    dadurch gekennzeichnet, dass die Auswuchtvorrichtung Aufnahmen (36, 38), welche in der Felge (18) ausgebildet sind, sowie Auswuchtgewichte (40, 30), welche in den Aufnahmen (36, 38) angeordnet sind, umfasst, wobei jede Aufnahme von einem in der Felge ausgebildeten Loch gebildet ist, wobei das Loch an der ersten Seitenfläche oder an der ersten und der zweiten Seitenfläche ausmündet.
  2. Einteilige beschaufelte Scheibe nach Anspruch 1, dadurch gekennzeichnet, dass die Aufnahmen (36, 38) unter einer Plattform (32), welche die Schaufeln (20) trägt, gelegen sind.
  3. Einteilige beschaufelte Scheibe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Aufnahmen (36, 38) über den Umfang der Felge (18) verteilt sind.
  4. Einteilige beschaufelte Scheibe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Aufnahmen (36) die Felge (18) nicht durchqueren und dass ihre Öffnungen auf einer gleichen Seitenfläche (180) der Felge (18) ausmünden und dass sie ferner einen Sicherungsring (44) umfasst, der dazu bestimmt ist, seitlich an der Felge (18) positioniert zu werden, um die Öffnungen der Aufnahmen (36) wenigstens teilweise zu verschließen.
  5. Einteilige beschaufelte Scheibe nach Anspruch 4, dadurch gekennzeichet, dass sie ferner einen umlaufenden Schlitz (42) aufweist, der dazu bestimmt ist, den Sicherungsring (44) aufzunehmen.
  6. Einteilige beschaufelte Scheibe nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass der Sicherungsring (44) einen Vorsprung (46) umfasst, der dazu bestimmt ist, in eine der Aufnahmen (36) einzugreifen, um ein axiales Drehen des Sicherungsringes (44) zu verhindern.
  7. Einteilige beschaufelte Scheibe nach einem der Ansprüche 1 bits 3, dadurch gekennzeichnet, dass die Aufnahmen (38) die Felge (18) zwischen einer ersten Seitenfläche (182) und einer zweiten Seitenfläche (184) dieser, welche ihrer ersten Fläche gegenüberliegt, durchqueren und dass die Aufnahmen (38) einen ersten Hohlraum (382), dessen Öffnung an der ersten Seitenfläche (182) der Felge (18) ausmündet, einen zweiten Hohlraurn (384), dessen Öffnung an der zweiten Fläche (184) der Felge (18) ausmündet, sowie einen Zwischenkanal (386), welcher die beiden Hohlräume (382, 384) verbindet, umfassen.
  8. Einteilige beschaufelte Scheibe nach Anspruch 7, dadurch gekennzeichnet, dass Auswuchtgewichte (40) in den ersten Hohlräume (382) angeordnet sind.
  9. Einteilige beschaufelte Scheibe nach Anspruch 8, dadurch gekennzeichnet, dass zusätzliche Gewichte (30) in den Zwischenkanälen (386) angeordnet sind.
  10. Einteilige beschaufelte Scheibe nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass sie ferner Dichtungsflansche (48) umfasst, die in den zweiten Hohlräumen (384) angeordnet sind.
  11. Einteilige beschaufelte Scheibe nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, dass sie ferner einen ersten Sicherungsring (442), der dazu bestimmt ist, seitlich an der Felge (18) positioniert zu werden, um die Öffnungen der ersten Hohlräume (382) wenigstens teilweise zu verschließen, sowie einen zweiten Sicherungsring (444) umfasst, der dazu bestimmt ist, seitlich an der Felge (18) positioniert zu werden, um die Öffnungen der zweiten Hohlräume (384) zu verschließen.
  12. Einteilige beschaufelte Scheibe nach Anspruch 11, dadurch gekennzeichnet, dass der erste Sicherungsring (442) bzw. der zweite Sicherungsring (444) einen Vorsprung aufweist, der dazu bestimmt ist, in einen der ersten Hohlräume (382) bzw. in einen der zweiten Hohlräume (384) einzugreifen, um ein axiales Drehen dessen zu verhindern.
  13. Einteilige beschaufelte Scheibe nach Anspruch 11 oder 12, dadurch gekennzeichet dass sie ferner einen ersten umlaufenden Schlitz (422), der dazu bestimmt ist, den ersten Sicherungsring (442) auszunehmen, sowie einen zweiten umlaufenden Schlitz (424) umfasst, der dazu bestimmt ist, den zweiten Sicherungsring (444) aufzunehmen.
  14. Einteilige, beschaufelte Scheibe nach einem der Ansprüche 4 bis 6 oder 11 bis 13, dadurch gekennzeichnet, dass jeder Sicherungsring (44, 442, 444) wenigstens die Hälfte der entsprechenden Öffnungen verschließt.
  15. Einteilige beschaufelte Scheibe nach Anspruch 14, dadurch gekennzeichnet, dass jeder Sicherungsring (44, 442, 444) die entsprechenden Öffnungen vollständig verschließt.
  16. Einteilige beschaufelte Scheibe nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass die Aufnahmen (36, 38) und die Auswuchtgewichte (40, 30) eine Form aufweisen, die dazu ausgelegt ist, ein Drehen oder ein Verschwenken der Auswuchtgewichte (40, 30) in ihren jeweiligen Aufnahmen (36, 38) zu verhindern.
  17. Rotor (10), dadurch gekennzeichnet, dass er wenigstens eine Scheibe nach einem der Ansprüche 1 bis 16 umfasst.
EP05100778.9A 2004-02-06 2005-02-04 Turbinenrotorscheibe mit einer Auswuchteinrichtung Expired - Lifetime EP1564372B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0450217 2004-02-06
FR0450217A FR2866057B1 (fr) 2004-02-06 2004-02-06 Dispositif d'equilibrage d'un disque de rotor, disque equipe d'un tel dispositif, et rotor ayant un tel disque

Publications (2)

Publication Number Publication Date
EP1564372A1 EP1564372A1 (de) 2005-08-17
EP1564372B1 true EP1564372B1 (de) 2013-07-10

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EP05100778.9A Expired - Lifetime EP1564372B1 (de) 2004-02-06 2005-02-04 Turbinenrotorscheibe mit einer Auswuchteinrichtung

Country Status (6)

Country Link
US (1) US7347672B2 (de)
EP (1) EP1564372B1 (de)
JP (1) JP4856879B2 (de)
CA (1) CA2495848C (de)
FR (1) FR2866057B1 (de)
RU (1) RU2362028C2 (de)

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Also Published As

Publication number Publication date
US20050191181A1 (en) 2005-09-01
CA2495848A1 (en) 2005-08-06
JP4856879B2 (ja) 2012-01-18
RU2005102783A (ru) 2006-07-10
US7347672B2 (en) 2008-03-25
CA2495848C (en) 2013-01-22
FR2866057B1 (fr) 2006-04-28
JP2005220908A (ja) 2005-08-18
FR2866057A1 (fr) 2005-08-12
RU2362028C2 (ru) 2009-07-20
EP1564372A1 (de) 2005-08-17

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