EP1439283A1 - Montageanordnung von Schwenkachsen verstellbarer Leitschaufeln - Google Patents

Montageanordnung von Schwenkachsen verstellbarer Leitschaufeln Download PDF

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Publication number
EP1439283A1
EP1439283A1 EP04100115A EP04100115A EP1439283A1 EP 1439283 A1 EP1439283 A1 EP 1439283A1 EP 04100115 A EP04100115 A EP 04100115A EP 04100115 A EP04100115 A EP 04100115A EP 1439283 A1 EP1439283 A1 EP 1439283A1
Authority
EP
European Patent Office
Prior art keywords
pivots
levers
mounting arrangement
casing
removable
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.)
Withdrawn
Application number
EP04100115A
Other languages
English (en)
French (fr)
Inventor
Alain Bromann
Philippe Pabion
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 Moteurs SA
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 Moteurs SA filed Critical SNECMA Moteurs SA
Publication of EP1439283A1 publication Critical patent/EP1439283A1/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the subject of this invention is a arrangement for mounting variable-pitch vanes.
  • Variable pitch vanes are called blades attached to the stator of a turbomachine and which have the ability to rotate to modify characteristics that they impose on the flow of gas and thus adjust the machine to its different regimes.
  • blades include, at their end external, pivots passing through the casing while being there retained by bearings allowing rotation, and the arrangement still includes levers engaged on portions outside the pivot housing.
  • levers are joined to a ring of common control going around the casing and whose rotation rotates the levers, pivots and vanes themselves.
  • the portions of the pivots have a square section and the lever heads have a square housing.
  • the commitment of the square section in the square housing of the lever allows to rotate the pivots and these blades in rotation.
  • a nut is screwed onto a threaded end of the pivots to hold the heads of the levers in place securely circumstance.
  • the pivots can tilt in the crankcase passages, possibly causing damage as a result of friction of elements of the mobile assembly on the housing or on the rotor. And even when the bearings are in better condition, gas leaks sometimes important are noted. This is why we have sought an improved arrangement in which these disadvantages would be reduced.
  • the characteristic essential of the new assembly is that it is possible adjust the clearance between the housing and the heads levers and, by reducing this play, lessen the gas leaks and better oppose tipping pivots thanks to the additional support provided by the head of the lever.
  • blade pivots are divided into two connected parts by means of axial position adjustment allowing to vary their length; one of the parties, who is removable, pivots and which carries the end threaded in which the retaining nut is engaged, has a stop for the lever; and the levers are tightened between the stops and the nuts. So the modification of the adjustment between the two parts of the pivot is equivalent to a change in distance between the casing and the removable portion of the pivots, and therefore between the housing and the lever.
  • a convenient means of connection between the two end parts of the pivots is a thread.
  • FIG. 1 The outer portion of a blade 1 appears in Figure 1, as well as its pivot 2 extending to through a passage 3 of a casing 4 out of it.
  • a pair of bearings 5 and 6 supports pivot 2 at ends of passage 3, and bearings 5 and 6 include, in addition to an annular socket 7 assigned to the centering of pivot 2 in passage 3, a portion flat 8 arranged around the ends of passage 3 and limiting the travel of the assembly without allow direct contact between dawn 1 and the internal end of the passage 3 or between the casing 4 and a head 9 of a control lever 10.
  • This lever 10 extends out of the casing 4 and its head 9 comprises a housing 11 in which is engaged the end of the pivot.
  • the housing 11 includes a square section 12, or more generally polygonal, over part of its height, and pivot 2 has a section complementary to this place, which allows it to rotate by tilting lever 10. This is achieved by a ring 13 not shown in detail but which is concentric to the stator 4.
  • the lever 10 carries a pin 14 at its end opposite to the head 9 and which penetrates in the ring 13. By turning the latter, the pin 14 is moved and the lever 10 turns.
  • the square section 12 extends only at the bottom of the housing 11, and above all the end of pivot 2 is divided into two portions one of which 15 is integral with the main portion of the pivot 2 (the one located in passage 3) but has a smaller radius, while the other portion 16 is removable and covers the previous one, to which it is connected in an adjustable manner by thread 17.
  • the removable portion 16 carries the threaded end 18 usual blade pivots and retaining nut 19 engaged around this end.
  • the portion removable 16 includes a stop 20 in the form of outer flange at its lower end, and the housing 11 has a stepped shape 21 abutting against the flange 20.
  • the screwing of the nut 19 makes it possible to tighten the head 9 between him and the stop 20 and therefore maintain the head 9 at a determined height and invariable on the removable portion 16.
  • the removable portion 16 has been adjusted, thanks to thread 17, at a height relative to the other portion 15 chosen so that the clearance between the bottom of the head 9 and the part plate 8 of the outer bearing 5 is very reduced. So, an involuntary tilting of pivot 2 when the bearings 5 and 6 are worn immediately produces a contact between the head 9 and the portion 8, limiting this failover.
  • the square section 12 extends under the removable portion 16 and the stop 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Clamps And Clips (AREA)
  • Hinges (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Control Of Turbines (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP04100115A 2003-01-17 2004-01-15 Montageanordnung von Schwenkachsen verstellbarer Leitschaufeln Withdrawn EP1439283A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0300476A FR2850131B1 (fr) 2003-01-17 2003-01-17 Agencement de montage d'aubes a calage variable
FR0300476 2003-01-17

Publications (1)

Publication Number Publication Date
EP1439283A1 true EP1439283A1 (de) 2004-07-21

Family

ID=32524964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04100115A Withdrawn EP1439283A1 (de) 2003-01-17 2004-01-15 Montageanordnung von Schwenkachsen verstellbarer Leitschaufeln

Country Status (6)

Country Link
US (1) US20040146398A1 (de)
EP (1) EP1439283A1 (de)
JP (1) JP2004225693A (de)
CA (1) CA2455016A1 (de)
FR (1) FR2850131B1 (de)
RU (1) RU2004101422A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4130441A1 (de) * 2021-08-05 2023-02-08 MTU Aero Engines AG Verbindungseinrichtung einer verstellbaren schaufel einer gasturbine und gasturbine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8414248B2 (en) 2008-12-30 2013-04-09 Rolls-Royce Corporation Variable geometry vane
US10030533B2 (en) * 2012-09-21 2018-07-24 United Technologies Corporation Flanged bushing for variable vane
US10208618B2 (en) * 2013-02-04 2019-02-19 United Technologies Corporation Vane arm having a claw
DE102013211629A1 (de) * 2013-06-20 2015-01-08 MTU Aero Engines AG Leitschaufelanordnung und Verfahren zum Montieren einer Leitschaufel
DE102016224523A1 (de) * 2016-12-08 2018-06-14 MTU Aero Engines AG Leitschaufelverstellung mit seitlich montiertem Verstellhebel
GB201711582D0 (en) * 2017-07-19 2017-08-30 Rolls Royce Plc Unison ring assembly

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2113194A1 (de) * 1971-03-18 1972-09-28 Daimler Benz Ag Lagerung von Verstellschaufeln
US3990810A (en) * 1975-12-23 1976-11-09 Westinghouse Electric Corporation Vane assembly for close coupling the compressor turbine and a single stage power turbine of a two-shaped gas turbine
US4139329A (en) * 1977-05-16 1979-02-13 Westinghouse Canada Limited Vane tip motion transfer device
US4307994A (en) * 1979-10-15 1981-12-29 General Motors Corporation Variable vane position adjuster
FR2583820A1 (fr) * 1985-06-20 1986-12-26 Snecma Dispositif de variation de section de passage d'un distributeur de turbine
EP0545656A1 (de) * 1991-12-02 1993-06-09 General Electric Company Verstellbarer Leitschaufelzusammenbau für einen Kompressor eines Gasturbinentriebwerkes
FR2699595A1 (fr) * 1992-12-23 1994-06-24 Snecma Dispositif de guidage en rotation d'un anneau de commande d'aubes pivotantes.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2113194A1 (de) * 1971-03-18 1972-09-28 Daimler Benz Ag Lagerung von Verstellschaufeln
US3990810A (en) * 1975-12-23 1976-11-09 Westinghouse Electric Corporation Vane assembly for close coupling the compressor turbine and a single stage power turbine of a two-shaped gas turbine
US4139329A (en) * 1977-05-16 1979-02-13 Westinghouse Canada Limited Vane tip motion transfer device
US4307994A (en) * 1979-10-15 1981-12-29 General Motors Corporation Variable vane position adjuster
FR2583820A1 (fr) * 1985-06-20 1986-12-26 Snecma Dispositif de variation de section de passage d'un distributeur de turbine
EP0545656A1 (de) * 1991-12-02 1993-06-09 General Electric Company Verstellbarer Leitschaufelzusammenbau für einen Kompressor eines Gasturbinentriebwerkes
FR2699595A1 (fr) * 1992-12-23 1994-06-24 Snecma Dispositif de guidage en rotation d'un anneau de commande d'aubes pivotantes.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4130441A1 (de) * 2021-08-05 2023-02-08 MTU Aero Engines AG Verbindungseinrichtung einer verstellbaren schaufel einer gasturbine und gasturbine

Also Published As

Publication number Publication date
US20040146398A1 (en) 2004-07-29
CA2455016A1 (en) 2004-07-17
FR2850131A1 (fr) 2004-07-23
RU2004101422A (ru) 2005-07-10
JP2004225693A (ja) 2004-08-12
FR2850131B1 (fr) 2005-02-25

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