EP1777375A1 - Lagervorrichtung einer verstellbaren Leitschaufel in einer Axialturbomaschine - Google Patents

Lagervorrichtung einer verstellbaren Leitschaufel in einer Axialturbomaschine Download PDF

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Publication number
EP1777375A1
EP1777375A1 EP06076731A EP06076731A EP1777375A1 EP 1777375 A1 EP1777375 A1 EP 1777375A1 EP 06076731 A EP06076731 A EP 06076731A EP 06076731 A EP06076731 A EP 06076731A EP 1777375 A1 EP1777375 A1 EP 1777375A1
Authority
EP
European Patent Office
Prior art keywords
housing
pivot
platform
blade
bearing
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
EP06076731A
Other languages
English (en)
French (fr)
Other versions
EP1777375B1 (de
Inventor
Claude Robert Louis Lejars
Didier Raymond Charles Riby
Thierry Jean-Maurice Niclot
Richard Emile Staessen
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
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Filing date
Publication date
Application filed by SNECMA SAS filed Critical SNECMA SAS
Publication of EP1777375A1 publication Critical patent/EP1777375A1/de
Application granted granted Critical
Publication of EP1777375B1 publication Critical patent/EP1777375B1/de
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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
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
    • 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
    • F05D2240/00—Components
    • F05D2240/50—Bearings
    • 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
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/23—Three-dimensional prismatic
    • F05D2250/231—Three-dimensional prismatic cylindrical

Definitions

  • the present invention relates to the field of turbomachines such as an axial compressor of a gas turbine engine, and aims in particular the variable-pitch stator vanes.
  • FIGS. 1 and 2 show diagrammatically a blade 1 of variable-pitch rectifier mounted in the casing 3 of the machine.
  • the blade comprises a blade 12, a plate or platform 13 and a pivot rod 14.
  • the pivot 14 is housed in a bore or radial orifice formed in the wall of the casing 3 via different bearings.
  • One of the bearings, the low bearing is constituted by a sleeve 4 in sliding contact with the lower part of the pivot rod 14, directly or via a hoop 14 '.
  • the bushing 4 is integral with the housing and comprises a portion 4 'housed in the bottom of a countersink machined in the wall of this housing. It is in radial contact with the platform 13.
  • the upper part of the pivot 14 is retained in a high bearing formed of a bush 5.
  • the opposite face of the platform 13 with respect to the bush forms the base of the blade and is swept by the gases passing through the turbomachine.
  • a nut 15 keeps the blade in its housing.
  • a lever 19, itself actuated by control members, controls the rotation of the blade around the axis XX of the rod to put it in the required position relative to the direction of the gas flow. The relative movements result from the sliding of the surfaces in contact with each other.
  • variable-pitch stator vanes Increasing the operating forces of variable-pitch stator vanes.
  • the blade comprises a blade, a platform and a pivot through which the blade is mounted in the casing of the turbomachine, in that it comprises a sleeve with a disc-shaped portion between the housing and the platform, an annular rib being provided on said disc-shaped portion cooperating with a complementary groove on the platform, so as to form a smooth bearing therebetween.
  • the distance between the point of application of the aerodynamic force and the bearing of the pivot guide device located at the bottom of the pivot is reduced. This decrease in height reduces the moment applied at dawn. It follows that the reaction force at the pivot to oppose the moment is lower. Thus the matting efforts at the contacts between the pivot of the blade and the bushing are lower, resulting in reduced wear.
  • the device optionally comprises a high bearing between the upper part of the pivot and its housing in the housing.
  • the guiding device comprises a low bearing between the lower part of the pivot and its housing in the housing. It further reduces the load on the bushings by distributing them.
  • a variably variable stator vane 20 is seen to be cantilevered with a blade 22, a platform 23 and a pivot 24.
  • the pivot 24 is housed in a radial bore of the casing 3 which is for example that of the compressor of a gas turbine engine.
  • the blade is retained by a nut 28 in its upper part and connected to a lever 27 for stall control as is known.
  • the terms high and low designate the position relative to the axis of the motor, a high element being away from the axis relative to a low element.
  • the guide device of the blade is constituted by a cylindrical sleeve 25 between the pivot 24 and the housing in the housing 3. This sleeve also provides sealing.
  • a socket 26 in the lower part of the pivot comprises a part cylindrical 26a between the lower part of the pivot and the housing in the housing.
  • the sleeve is extended by a generally disk-shaped portion 26b, between the platform 23 and the bottom of the housing counterbore constituting the housing thereof.
  • a bearing is formed at the platform.
  • the bearing is formed by the cooperation of a rib 26b1 and a groove 23b1.
  • the circular rib is formed on the face of the sleeve facing the platform 23.
  • the circular term also includes the embodiment wherein the rib extends over one or more arcs of circles.
  • This rib is according to this example square section and is adjusted in the groove 23b1 of complementary shape, hollowed in the face of the platform facing the sleeve 26.
  • the two parts, rib and groove form an integrated bearing 23b1-26b1 which takes again the aerodynamic forces applied on the blade and transmits them to the casing 3.
  • the radius of the integrated bearing is chosen so that the friction between the rib 26bl of the sleeve 26 and the groove 23bl of the platform induce a resistance to the axial pivoting of the blade which is acceptable and does not disturb the operation of the control means of the setting.
  • the sleeve 26 remains stationary relative to the housing.
  • the forces in the presence are the aerodynamic force F, the reaction force F1 of the casing on the lower part of the guiding device and the force F2 of the reaction of the casing on the upper part of the guiding device.
  • L, 50mm is the distance between the point of application of F and the low bearing
  • L1, 40 mm is the distance between the low bearing and the high bearing.
  • F1 and F2 are respectively 225 daN and 125 daN.
  • Prior art Invention Gain F 100 100 F1 (daN) 225 187.5 17% F2 (daN) 125 87.5 30% L (mm) 50 42 L1 (mm) 40 48 Moment 5000 4200
  • FIG. 3 shows a variant of the invention according to which the bearing is maintained at the bottom of the pivot relative to the previous solution.
  • the load is distributed between F1 and F1 '.
  • the references are the same as for the previous solution.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP06076731.6A 2005-10-18 2006-09-18 Lagervorrichtung einer verstellbaren Leitschaufel in einer Axialturbomaschine Active EP1777375B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0553159A FR2892147B1 (fr) 2005-10-18 2005-10-18 Dispositif de guidage d'aube de stator a calage variable dans une turbomachine axiale

Publications (2)

Publication Number Publication Date
EP1777375A1 true EP1777375A1 (de) 2007-04-25
EP1777375B1 EP1777375B1 (de) 2014-07-16

Family

ID=36658578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06076731.6A Active EP1777375B1 (de) 2005-10-18 2006-09-18 Lagervorrichtung einer verstellbaren Leitschaufel in einer Axialturbomaschine

Country Status (3)

Country Link
US (1) US7661925B2 (de)
EP (1) EP1777375B1 (de)
FR (1) FR2892147B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2622178A4 (de) * 2010-09-30 2017-12-27 Rolls-Royce North American Technologies, Inc. Dichtungsanordnung für eine verstellbare leitschaufel
DE102017222209A1 (de) * 2017-12-07 2019-06-13 MTU Aero Engines AG Leitschaufelanbindung sowie Strömungsmaschine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2913052B1 (fr) * 2007-02-22 2011-04-01 Snecma Commande des aubes a angle de calage variable
US10570762B2 (en) * 2015-05-15 2020-02-25 United Technologies Corporation Vane strut positioning and securing systems including locking washers
FR3039226B1 (fr) 2015-07-20 2017-07-14 Snecma Etage d'aubes a calage variable pour une turbomachine
CN114278435B (zh) * 2020-09-28 2023-05-16 中国航发商用航空发动机有限责任公司 压气机、燃气涡轮发动机、可调静叶组件以及装配方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE736266C (de) * 1940-03-26 1943-06-10 Escher Wyss Maschinenfabrik G Kreiselpumpe mit regulierbaren Leitschaufeln
US3558237A (en) * 1969-06-25 1971-01-26 Gen Motors Corp Variable turbine nozzles
DE2113194A1 (de) * 1971-03-18 1972-09-28 Daimler Benz Ag Lagerung von Verstellschaufeln
US3788763A (en) * 1972-11-01 1974-01-29 Gen Motors Corp Variable vanes
US4856962A (en) * 1988-02-24 1989-08-15 United Technologies Corporation Variable inlet guide vane
EP1400659A1 (de) * 2002-09-18 2004-03-24 General Electric Company Methode und Apparatus zur Abdichtung von verstellbaren Leitschaufeln von Gasturbinen
EP1584827A1 (de) * 2004-04-05 2005-10-12 Snecma Keramikbuchse für eine verstellbare Leitschaufelanordnung einer Turbomaschine
EP1717450A2 (de) * 2005-04-28 2006-11-02 Snecma Verstellbaren Leitschaufel, Verfahren zur Reparatur eines Schaufels

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1685260A (en) * 1926-06-17 1928-09-25 William M White Guide vane
AT321224B (de) * 1971-10-06 1975-03-25 Andritz Ag Maschf Verstellbare Leitschaufeln für Turbinen
US4498790A (en) * 1983-11-21 1985-02-12 United Technologies Corporation Bushing securing apparatus
JPH03149415A (ja) * 1989-10-12 1991-06-26 Uingu Haisera:Kk セラミックス製軸受
DE4032803A1 (de) * 1990-10-16 1992-04-30 D O R N E Y Technologie Gmbh Formteil aus einem metallischen und einem keramischen koerper
US5622473A (en) * 1995-11-17 1997-04-22 General Electric Company Variable stator vane assembly

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE736266C (de) * 1940-03-26 1943-06-10 Escher Wyss Maschinenfabrik G Kreiselpumpe mit regulierbaren Leitschaufeln
US3558237A (en) * 1969-06-25 1971-01-26 Gen Motors Corp Variable turbine nozzles
DE2113194A1 (de) * 1971-03-18 1972-09-28 Daimler Benz Ag Lagerung von Verstellschaufeln
US3788763A (en) * 1972-11-01 1974-01-29 Gen Motors Corp Variable vanes
US4856962A (en) * 1988-02-24 1989-08-15 United Technologies Corporation Variable inlet guide vane
EP1400659A1 (de) * 2002-09-18 2004-03-24 General Electric Company Methode und Apparatus zur Abdichtung von verstellbaren Leitschaufeln von Gasturbinen
EP1584827A1 (de) * 2004-04-05 2005-10-12 Snecma Keramikbuchse für eine verstellbare Leitschaufelanordnung einer Turbomaschine
EP1717450A2 (de) * 2005-04-28 2006-11-02 Snecma Verstellbaren Leitschaufel, Verfahren zur Reparatur eines Schaufels

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2622178A4 (de) * 2010-09-30 2017-12-27 Rolls-Royce North American Technologies, Inc. Dichtungsanordnung für eine verstellbare leitschaufel
DE102017222209A1 (de) * 2017-12-07 2019-06-13 MTU Aero Engines AG Leitschaufelanbindung sowie Strömungsmaschine
US10982558B2 (en) 2017-12-07 2021-04-20 MTU Aero Engines AG Guide vane connection

Also Published As

Publication number Publication date
FR2892147A1 (fr) 2007-04-20
FR2892147B1 (fr) 2010-09-17
US7661925B2 (en) 2010-02-16
US20080025837A1 (en) 2008-01-31
EP1777375B1 (de) 2014-07-16

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