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EP0093631B1 - Sicherheitsanschlag für die Zapfen von drehregelbaren Leitschaufeln - Google Patents

Sicherheitsanschlag für die Zapfen von drehregelbaren Leitschaufeln Download PDF

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Publication number
EP0093631B1
EP0093631B1 EP83400695A EP83400695A EP0093631B1 EP 0093631 B1 EP0093631 B1 EP 0093631B1 EP 83400695 A EP83400695 A EP 83400695A EP 83400695 A EP83400695 A EP 83400695A EP 0093631 B1 EP0093631 B1 EP 0093631B1
Authority
EP
European Patent Office
Prior art keywords
pivot
arm
inner ring
attachment means
vanes
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
Application number
EP83400695A
Other languages
English (en)
French (fr)
Other versions
EP0093631A1 (de
Inventor
Daniel Jean Marey
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
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of EP0093631A1 publication Critical patent/EP0093631A1/de
Application granted granted Critical
Publication of EP0093631B1 publication Critical patent/EP0093631B1/de
Expired 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line

Definitions

  • the invention relates to a safety stop device in a stator formed of variable-pitch blades, each blade comprising a head pivot and a foot pivot, the head pivot cooperating with a bearing fixed in the motor casing, being driven by a device for adjusting the orientation of the blades, the foot pivot being movable in a bearing fixed in an inner ring of the motor, the safety stop device comprising stop elements provided in the inner ring to limit the deflections of the blade in the event of a rupture of one of the elements of the device for adjusting the orientation of the blades.
  • stator vanes with variable setting is given in French patent N ° 2205952 in which the preliminary compression stage and four upper compression stages are fitted with adjustable stator fins.
  • the pivots at the head of these fins are controlled by a ring and lever system which, from a single order, changes the orientation of the fins of each stage concerned.
  • the stator of the preliminary compression stage comprises fins of relatively large dimensions, which are further provided with a pivot at the foot allowing the bending forces to be taken up.
  • the invention aims to minimize the drawbacks resulting from a break in control and is suitable in particular for stator blades with variable setting controlled at the head and comprising a foot pivot.
  • a device of this kind is already known from US-A patent No. 3029067 which provides a stop consisting of a pin and cooperating with part of the blade to prevent unwanted rotation beyond a certain angular value.
  • the proposed device is not entirely satisfactory, in particular for the simplicity of construction and the shear strength at high torques.
  • the device according to the invention is remarkable in that it consists of an arm comprising means for fixing to the foot pivot and of abutment elements constituted by the side walls of a circumferential groove formed in the internal surface of the inner ring and against which the arm rests.
  • Fig. 1 shows in partial section part of a compressor stage comprising a stator 1 formed of a crown of vanes 2 with pivots at the top 3 and at the bottom 4 whose orientation is controlled at the top by a control system 5 located at outside the crankcase 6, and a rotor 7 formed of vanes 8, the feet of which are embedded in the rotor disc 9.
  • the head pivot 3 pivots in a bearing fixed in the upper ring or casing 6.
  • a connecting rod or control lever 10 is fixed by one of its ends to the pivot 3 and, by its other end, to a control device 11 of the crown of blades.
  • the foot pivot 4 is held in a bearing 12 fixed in the inner ring 13.
  • the stop device according to the invention (fig. 2,3, 5) consists of an arm 14 in the hands comprising means for fixing to the pivot 4 and stop elements 15, 16 fixed to the inner ring 13 and against which the arm 14 is supported, in the event of a break in the control mechanism 10-11 for example.
  • the cylindrical pivot 4 of the blade root carries at its end at least one flat 17, and preferably two parallel flat.
  • the pivot 4 cooperates with a bearing 12 consisting of a bush made of a self-lubricating material fixed in the lower ring 13 of the stage.
  • This ring is provided on its internal surface 18 with a circumferential groove 19 in which the end of the pivot 4 projects and, in particular, the part carrying the flats 17.
  • An arm 14 is fixed on the end of the pivot by fixing means formed by a central hole 20 of rectangular shape with two opposite curved sides corresponding to the shape of the end of the pivot.
  • the arm 14 has, in plan view (fig. 4) a diamond shape in which the two vertices 22, 23 located on the small diagonal, are rounded. The length of this diagonal is less than the width of the groove 19.
  • angles of the rhombus are determined so as to allow the orientation of the blades to be adjusted at a given angle.
  • the end of the opposite sides of the rhombus is placed against the abutment elements formed by the sides 15, 16 of the groove 19.
  • annular profile 21 for example in the form of a C, is fixed by any means known per se to the lower ring 13.
  • the foot pivot 4 carries in its axis a hexagonal blind hole 24, into which penetrates a stud 25 of comparable shape and dimensions, perpendicular to the plane of the arm 14 and integral with the latter.
  • An annular C 21 profile fixed on the inner ring ensures the sealing and possibly maintains the arm in cooperation with the pivot.
  • the fact of limiting the amplitude of the possible accidental movement of the blade makes it possible to limit the total length of the motor: in fact, the blades can no longer be placed in a flag, rope parallel to the wind bed, we can reduce the length of the motor by 5 mm per stage, resulting in a significant reduction in mass.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Turbines (AREA)
  • Sliding-Contact Bearings (AREA)

Claims (6)

1. Sicherheitsanschlag in einem durch drehstellungsregelbare Schaufeln gebildeten Stator, wobei jede Schaufel einen Kopfzapfen und einen Fusszapfen besitzt,
wobei der in einem in dem Motorgehäuse befistigten Lager laufenden Kopfzapfen von einer Vorrichtung zur Regelung der Schaufelstellung angetrieben ist und der Fusszapfen in einem an dem Innenring des Motors befestigten Lager bewegbar ist,
und wobei der Sicherheitsanschlag in dem Innenring angeordnete Anschlagelemente aufweist, welche den Schaufelausschlag im Fall eines Bruchs eines der Elemente der Vorrichtung zur Regelung der Schaufelstellung begrenzen, dadurch gekennzeichnet, dass die Anschlagelemente (15, 16) von den Seitenwandungen einer in der Innenfläche (18) des genannten Innenrings (13) angebrachten umlaufenden Nut (19) gebildet sind und mit einem Arm (14) zusammenwirken, der Mittel (20,25) zu seiner Befestigung an dem Fusszapfen (4) aufweist.
2. Sicherheitsanschlag nach Anspruch 1, dadurch gekennzeichnet, dass der Arm (14) die Form eines Rhombus hat, in dessen Zentrum die genannten Befestigungsmittel (20, 25) angeordnet sind.
3. Sicherheitsanschlag nach Anspruch 1, dadurch gekennzeichnet, dass der Arm (14) die Form eines gleichschenkligen Dreiecks hat, in dessen Basismitte die Befestigungsmittel (20, 25) angeordnet sind.
4. Sicherheitsanschlag nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Befestigungsmittel des Arms (14) von einer rechteckigen Öffnung (20) gebildet sind, die zwei einander gegenüberliegende bogenförmig gekrümmte Seiten aufweist und die mit dem zylindrischen, mit zwei parallelen Abflachungen (17) versehenen Ende des Fusszapfens zusammenarbeitet.
5. Sicherheitsanschlag nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Befestigungsmittel von einem senkrecht zu dem Arm ausgerichteten und fest mit ihm verbundenen Sechskantkopf (25) gebildet sind, der mit einer in der Achse des Fusszapfens (4) vorgesehenen sechseckigen Blindbohrung zusammenwirkt.
6. Sicherheitsanschlag nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass ein auf dem lnnenring (13) befistigtes C-Profilstück (21) vorgesehen ist, das die genannte Nut (19) verschliesst.
EP83400695A 1982-04-08 1983-04-06 Sicherheitsanschlag für die Zapfen von drehregelbaren Leitschaufeln Expired EP0093631B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8206117 1982-04-08
FR8206117A FR2524934B1 (fr) 1982-04-08 1982-04-08 Dispositif de butee de securite pour pivot d'aubes de stator a calage variable

Publications (2)

Publication Number Publication Date
EP0093631A1 EP0093631A1 (de) 1983-11-09
EP0093631B1 true EP0093631B1 (de) 1986-01-29

Family

ID=9272876

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400695A Expired EP0093631B1 (de) 1982-04-08 1983-04-06 Sicherheitsanschlag für die Zapfen von drehregelbaren Leitschaufeln

Country Status (5)

Country Link
US (1) US4514141A (de)
EP (1) EP0093631B1 (de)
JP (1) JPS58206810A (de)
DE (1) DE3361967D1 (de)
FR (1) FR2524934B1 (de)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556410B1 (fr) * 1983-12-07 1986-09-12 Snecma Dispositif de centrage de l'anneau interieur d'un stator a ailettes a calage variable
FR2582720B1 (fr) * 1985-05-29 1989-06-02 Snecma Procede de realisation de pivot d'aube de turbomachine et aube de stator le comportant
FR2583817B1 (fr) * 1985-06-20 1988-07-29 Snecma Biellette de commande d'aube a calage variable de stator de compresseur de turbomachine
US4695220A (en) * 1985-09-13 1987-09-22 General Electric Company Actuator for variable vanes
US4792277A (en) * 1987-07-08 1988-12-20 United Technologies Corporation Split shroud compressor
FR2644525B1 (fr) * 1989-03-15 1991-05-24 Snecma Systeme de retention d'aubes de stator a calage variable
US5492446A (en) * 1994-12-15 1996-02-20 General Electric Company Self-aligning variable stator vane
FR2742799B1 (fr) * 1995-12-20 1998-01-16 Snecma Palier d'extremite interne d'aube pivotante
US20080053547A1 (en) * 1997-11-24 2008-03-06 Yungrwei Chen Energy attenuation apparatus for a conduit conveying liquid under pressure, system incorporating same, and method of attenuating energy in a conduit
US6019574A (en) * 1998-08-13 2000-02-01 General Electric Company Mismatch proof variable stator vane
US6413043B1 (en) * 2000-11-09 2002-07-02 General Electric Company Inlet guide vane and shroud support contact
EP1205639A1 (de) * 2000-11-09 2002-05-15 General Electric Company Befestigungsanordnung von verstellbaren Turbinenleitschaufeln im inneren Haltering
US6682299B2 (en) 2001-11-15 2004-01-27 General Electric Company Variable stator vane support arrangement
DE10161292A1 (de) 2001-12-13 2003-06-26 Rolls Royce Deutschland Lagerring zur Lagerung von Schaufelfüßen von verstellbaren Statorschaufeln im Hochdruckverdichter einer Gasturbine
FR2835562B1 (fr) * 2002-02-07 2004-07-16 Snecma Moteurs Agencement de pivotement d'aube de stator dans une turbomachine
GB2412947B (en) * 2004-04-07 2006-06-14 Rolls Royce Plc Variable stator vane assemblies
FR2875270B1 (fr) * 2004-09-10 2006-12-01 Snecma Moteurs Sa Retenue des clavettes de centrage des anneaux sous aubes de stator a calage variable d'un moteur a turbine a gaz
GB0504588D0 (en) * 2005-03-05 2005-04-13 Rolls Royce Plc Pivot ring
US7249613B1 (en) 2006-02-03 2007-07-31 Dayco Products, Llc Energy attenuation device
US7717135B2 (en) * 2006-02-03 2010-05-18 Yh America, Inc. Energy attenuation device
DE102006024085B4 (de) * 2006-05-23 2020-04-16 MTU Aero Engines AG Turboverdichter in Axialbauweise
US20080210486A1 (en) * 2007-03-02 2008-09-04 Dayco Products, Llc Energy attenuation device
FR2928961B1 (fr) * 2008-03-19 2015-11-13 Snecma Distributeur sectorise pour une turbomachine.
FR2964710B1 (fr) * 2010-09-14 2012-08-31 Snecma Douille pour aube a calage variable
FR2995934B1 (fr) * 2012-09-24 2018-06-01 Safran Aircraft Engines Aube pour redresseur de turbomachine
US9995166B2 (en) * 2014-11-21 2018-06-12 General Electric Company Turbomachine including a vane and method of assembling such turbomachine
DE102014223975A1 (de) * 2014-11-25 2016-05-25 MTU Aero Engines AG Leitschaufelkranz und Strömungsmaschine
EP3421754B1 (de) * 2016-03-30 2021-12-01 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Turbolader mit variabler geometrie
FR3053383B1 (fr) * 2016-07-04 2019-08-02 Safran Aircraft Engines Clinquant de retention de douilles d'anneaux de commande d'aubes a calage variable et turboreacteur l'incorporant
DE102016215807A1 (de) * 2016-08-23 2018-03-01 MTU Aero Engines AG Innenring für einen Leitschaufelkranz einer Strömungsmaschine
FR3055374B1 (fr) * 2016-08-23 2018-08-03 Safran Aircraft Engines Piece d'interface pour reconditionner un anneau de commande d'un compresseur de moteur, et procede de reconditionnement associe
DE102017109952A1 (de) * 2017-05-09 2018-11-15 Rolls-Royce Deutschland Ltd & Co Kg Rotorvorrichtung einer Strömungsmaschine
GB201715165D0 (en) 2017-09-20 2017-11-01 Rolls Royce Plc Bearing assembly
DE102018210601A1 (de) * 2018-06-28 2020-01-02 MTU Aero Engines AG Segmentring zur montage in einer strömungsmaschine
DE102018213983A1 (de) 2018-08-20 2020-02-20 MTU Aero Engines AG Verstellbare Leitschaufelanordnung, Leitschaufel, Dichtungsträger und Turbomaschine
CN112096658B (zh) * 2020-11-06 2021-01-22 中国航发上海商用航空发动机制造有限责任公司 航空发动机压气机及其可调静子叶片位置保持结构
FR3123885B1 (fr) * 2021-06-15 2023-06-16 Safran Aircraft Engines Redresseur non carene de turbomachine equipe d’aubes de stator fixees a des pivots et turbomachine correspondante
FR3132123B1 (fr) * 2022-01-21 2023-12-08 Safran Aircraft Engines Aube de redresseur de flux secondaire de turbomachine, turbomachine munie de celle-ci
US12180974B2 (en) 2022-03-24 2024-12-31 Copeland Lp Variable inlet guide vane apparatus and compressor including same
US12516678B2 (en) * 2023-03-20 2026-01-06 Copeland Lp Variable inlet guide vane apparatus combined with compressor end cap
FR3161923A1 (fr) 2024-05-06 2025-11-07 Safran Aircraft Engines Etage d’aubes a calage variable pour une turbomachine d’aeronef

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US1570536A (en) * 1925-02-20 1926-01-19 Morgan Smith S Co Gate stop for turbine construction
GB621175A (en) * 1946-11-16 1949-04-05 Power Jets Res & Dev Ltd Improvements in or relating to stator blading of compressors and like machines
FR1041161A (fr) * 1951-08-14 1953-10-21 Napier & Son Ltd Perfectionnements aux appareils à réaction à courant axial de fluide comprenant au moins une rangée d'aubes radiales
BE556572A (de) * 1955-08-16
US3029067A (en) * 1956-05-31 1962-04-10 Garrett Corp Variable area nozzle means for turbines
DE1047538B (de) * 1956-10-29 1958-12-24 Siemens Ag Drehbare Leitschaufel mit begrenztem Drehbereich, insbesondere fuer Turbinen, z. B. Gasturbinen
FR1281702A (fr) * 1960-03-15 1962-01-12 Daimler Benz Ag Dispositif de palier d'aubes directrices réglables pour turbines à gaz ou pour turbines à air chaud
US3107546A (en) * 1960-04-25 1963-10-22 Pacific Valves Inc Internal stop means for valves
US3303992A (en) * 1965-03-03 1967-02-14 Gen Motors Corp Variable vane stator ring
NO119216B (de) * 1965-04-12 1970-04-06 Nydqvist & Holm Ab
US3295827A (en) * 1966-04-06 1967-01-03 Gen Motors Corp Variable configuration blade
US3367628A (en) * 1966-10-31 1968-02-06 United Aircraft Corp Movable vane unit

Also Published As

Publication number Publication date
EP0093631A1 (de) 1983-11-09
US4514141A (en) 1985-04-30
DE3361967D1 (en) 1986-03-13
FR2524934A1 (fr) 1983-10-14
JPS58206810A (ja) 1983-12-02
FR2524934B1 (fr) 1986-12-26
JPH029161B2 (de) 1990-02-28

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