EP1887188B1 - Steuervorrichtung einer Schaufel mit verstellbaren Winkel für eine Turbomachine mit zylindrischer Pleuelstange - Google Patents

Steuervorrichtung einer Schaufel mit verstellbaren Winkel für eine Turbomachine mit zylindrischer Pleuelstange Download PDF

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Publication number
EP1887188B1
EP1887188B1 EP07113013A EP07113013A EP1887188B1 EP 1887188 B1 EP1887188 B1 EP 1887188B1 EP 07113013 A EP07113013 A EP 07113013A EP 07113013 A EP07113013 A EP 07113013A EP 1887188 B1 EP1887188 B1 EP 1887188B1
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EP
European Patent Office
Prior art keywords
pivot
rod
vane
clamping
bore
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Application number
EP07113013A
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English (en)
French (fr)
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EP1887188A1 (de
Inventor
Michel Bouru
André Verbrugge
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Safran Aircraft Engines SAS
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SNECMA SAS
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Publication of EP1887188A1 publication Critical patent/EP1887188A1/de
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Classifications

    • 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
    • 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 present invention relates to the general field of control of blades variable pitch angle. It finds a particular application in the field of aeronautics, in particular for controlling the angular positions of air inlet guide vanes in turbomachine compressors.
  • Known devices for controlling variable pitch angle blades in a turbomachine usually comprise a control member in the form of a ring surrounding a casing of the turbomachine and a plurality of levers or links, each link having a first end connected to the control ring by a hinge and a second end mounted on the pivot of a respective blade.
  • the synchronized modification of the angular position of the blades is made by rotation of the ring around the axis of the turbomachine.
  • connection between each link and the ring comprises at least one degree of freedom in rotation about an axis directed substantially radially relative to the ring.
  • the link being rigidly mounted on the pivot of the corresponding blade, the rotation of the ring induces other relative movements between the ring and the portion of the rod mounted on the pivot of the blade.
  • the pivot of the blade may comprise a threaded end which passes through an orifice drilled in the control rod, a nut tightened on the threaded end of the pivot to link in rotation all of these parts previously indexed angularly.
  • the document FR 2698405 discloses a variable pitch angle control system comprising a lever, means for fixing a first end of the lever on a pin of a blade to be controlled, and hollow pins for connecting a second end of the blade.
  • lever with a control ring the lever being of substantially cylindrical shape and the first end of the lever is pressed into a hole of the trunnion.
  • the main purpose of the present invention is therefore to overcome such drawbacks by proposing a blade control device with a variable pitch angle that makes it possible to maintain the link without play on the pivot of the blade to be controlled in order to eliminate drive imprecision without the need for additional parts.
  • a blade control device with variable pitch angle for a turbomachine compressor comprising a connecting rod, means for fixing a first end of the link on a pivot of a blade to be controlled, and connecting means between a second end of the rod and a control ring, and wherein, according to the invention, the rod is substantially cylindrical in shape, the first end of the rod is fitted in a bore of the pivot of the dawn, and the device further comprises means for clamping the first end of the rod in the bore of the pivot to ensure its attachment to the pivot.
  • This type of control device has many advantages. In particular, it makes it possible to neutralize with a minimum of parts the initial bonding game resulting from manufacturing tolerances of the constituent parts of this assembly. Any imprecision of training is thus suppressed. Furthermore, a rod of substantially cylindrical shape as used in the device according to the invention has a perfect rigidity over its entire length, undergoes no torsion movement and is simple to achieve which contributes to increasing its life and to reduce its manufacturing cost. Finally, such a device having only very few parts, it is easy assembly.
  • the clamping means exert a nip in a direction substantially perpendicular to the longitudinal axis of the rod.
  • the device preferably comprises a slot made in the pivot of the blade along a plane passing through the longitudinal axis of the rod and median pivot, an orifice made through the pivot in a direction substantially perpendicular to the plane of the slot, and a screw mounted in the hole of the pivot and tightened by a clamping nut so as to make a nip of the slot.
  • the first end of the rod may include a recess intended to cooperate with a cylindrical portion of the body of the screw when it is mounted in the orifice of the pivot of the blade so as to provide additional locking of the rod on the pivot.
  • the pivot of the blade may have a substantially flat shoulder intended to cooperate with a flat head of the screw when it is mounted in the orifice of the pivot of the blade so as to ensure a locking in rotation of the screw in the pivot hole.
  • the clamping means exert a nip in a direction substantially parallel to the longitudinal axis of the link.
  • the first end of the rod is threaded and the bore of the pivot of the blade has two end portions in substantially conical frustum opening towards the outside of the pivot, the two end portions being interconnected by a substantially cylindrical central portion.
  • the first end of the link may comprise a flange having a conical bearing surface cooperating with one of the end portions of the bore of the pivot of the blade and the device may further comprise a pinch piece of substantially frustoconical shape mounted around the first end of the link and cooperating with the other end portion of the pivot bore, said clamping piece having longitudinal slots, and a tightening nut screwed onto the first end of the link and clamped against the pinch piece.
  • the first end of the link may comprise a flange forming longitudinal stop and the device may further comprise a first pinch piece of shape substantially frustoconical mounted around the first end of the link abutting against the flange and cooperating with one of the end portions of the bore of the blade pivot, a second substantially frustoconical gripping piece mounted around the first end of the rod and cooperating with the other end portion of the bore of the pivot of the blade, the gripping parts each having longitudinal slots, and a tightening nut screwed onto the first end of the connecting rod and tight against the second pinch piece.
  • the invention also relates to a compressor and a turbomachine comprising at least one blade control device variable pitch angle as defined above.
  • the Figures 1 to 3 represent a control device according to one embodiment of the invention.
  • a control device commands a variable pitch angle blade which is for example arranged at the inlet of a low-pressure compressor of a turbomachine.
  • variable pitch angle blade ends at an outer radial end (or blade head) by a control pivot 10 (or upper pivot) and at an inner radial end (or dawn foot). ) by a guide pin (or lower pivot) not shown in the figures.
  • the control pivot 10 of the generally substantially cylindrical blade passes through a stator casing 11 of the turbomachine.
  • the control pivot 10 ends with a head 12 on which is engaged a first end 14a of a control rod 14, the second end 14b cooperates with a control ring 16 by connecting means 18 forming a hinge.
  • this articulation can be achieved by an axis or finger 20 passing through the second end 14b of the rod and engaged in a housing 22 of the control ring 16.
  • the control ring 16 is centered on the axis of the turbomachine and its rotation around it rotates the control rods 14, and thus simultaneously change the orientation of all blades variable pitch angle of the same stage of the compressor.
  • the link 14 is substantially cylindrical in shape and the first end 14a thereof is fitted into a bore 24 of corresponding shape to the rod and passing through the pivot 10 from one side to the other.
  • the device further comprises means for clamping the first end 14a of the rod 14 in the bore 24 of the pivot 10 to ensure its attachment to said pivot.
  • the pinching means exert a nip in a direction substantially perpendicular to the longitudinal axis XX of the rod 14.
  • control device of this embodiment comprises a slot 26 formed in the pivot 10 of the blade (at its head 12) in a plane P ( figure 2 ) which passes through the longitudinal axis XX of the link 14 and which is median to the pivot 10.
  • This slot 26 thus divides the head 12 of the pivot 10 into two parts 12a, 12b substantially symmetrical with respect to the plane P.
  • An orifice 28 of substantially circular cross-section is also made through the pivot 10 of the blade (at its head 12) in a direction substantially perpendicular to the plane P of the slot 26.
  • the orifice 28 and the bore 24 of the pivot are substantially perpendicular to each other.
  • a screw 30 with a cylindrical body and threaded at its end is mounted in the orifice 28 of the pivot.
  • a tightening nut 32 is also screwed onto the threaded end of the screw 30 while bearing against one of the parts 12a of the head 12 of the pivot, the head 34 of the screw 30 bearing against the other part 12b of the head 12 of the pivot.
  • a nip of the slot 26 is then made by bringing the portions 12a, 12b of the head 12 of the pivot together, which makes it possible to obtain a fixation of the first end 14a of the link 14 in the bore 24 of the pivot 10.
  • the first end 14a of the rod 14 has a recess 36a, 36b intended to cooperate with the cylindrical portion of the body of the screw 30 when the latter is mounted in the orifice 28 of the pivot 10 of dawn.
  • FIGS. Figures 4A and 4B Two exemplary embodiments of such a print are illustrated in FIGS. Figures 4A and 4B .
  • the rod has a recess 36a which is formed as an annular groove of substantially circular cross section.
  • a shape also corresponds to that practiced on the first end of the connecting rod of Figures 2 and 3 .
  • the link has a footprint 36b which is in the form of a single scoop with substantially circular cross section. This type of impression requires the rod to be inserted correctly into the bore of the pivot but, with respect to an annular groove, does not reduce the rigidity of the link.
  • the pivot 10 of the blade has a substantially planar shoulder 10a intended to cooperate with a plate 34a of the head 34 of the screw 30 when the latter is mounted in the orifice 28 of the pivot 10 of dawn ( figure 3 ). In this way, it is possible to ensure rotational locking of the screw 30 in the hole 28 of the pivot.
  • FIGS. 5 to 9 illustrate a second embodiment of the invention in which the clamping means exert a nip in a direction substantially parallel to the longitudinal axis XX of the rod 14.
  • the first end 14a of the cylindrical rod 14 is threaded and the bore 24 of the pivot 10 of the blade is divided into three parts: two end portions 24a, 24b shaped substantially of conical frustums which open towards the outside of the pivot, and a substantially cylindrical central portion 24c which connect the two end portions 24a, 24b ( figures 6 and 9 ).
  • the first end 14a of the rod 14 also comprises a collar 38 having a substantially conical bearing which cooperates with one of the end portions 24b of the bore 24 of the pivot 10 of the blade.
  • the control device further comprises a nip piece 40 having a substantially frustoconical portion mounted around the first end 14a of the rod 14 and cooperating with the other end portion 24a of the bore 24 of the pivot 10.
  • the clamping piece 40 has slots 42 which extend substantially along the longitudinal axis XX of the link when it is mounted in position and which are evenly distributed over its entire circumference.
  • a tightening nut 44 is screwed onto the threaded portion of the first end 14a of the rod 14 and clamped against the nip 40.
  • the nip 40 will tend to translate into the bore 24 of the pivot 10 by compressing itself because of the longitudinal slots 42.
  • the flange 38 of the rod 14 being in abutment in one of the end portions 24b of the bore 24 of the pivot 10, a nip is then obtained in a direction substantially parallel to the longitudinal axis XX of the link which makes it possible to secure the attachment of the first end 14a of the link 14 in the bore 24 of the pivot 10.
  • a washer 46 may be interposed between the clamping nut 44 and the clamping piece 40 so as to avoid damaging the latter during tightening of the nut.
  • the first end 14a of the link 14 comprises a flange 48 forming a longitudinal stop.
  • control device comprises first and second nip pieces 50a, 50b each having a substantially frustoconical shaped portion and each mounted around the first end 14a of the rod 14.
  • the first nip 50a cooperates with one of the end portions 24b of the bore 24 of the pivot 10 of the blade and abuts against the flange 48 of the rod 14 when it is fitted into the pivot bore.
  • the second nip 50b As for the second nip 50b, it cooperates with the other end portion 24a of the bore 24 of the pivot 10 of the blade when the rod is fitted. As shown on the figure 8 these nip pieces 50a, 50b each have longitudinal slots 52.
  • a clamping nut 54 is screwed onto the threaded portion of the first end 14a of the rod 14 and clamped against the second nipping piece 50b.
  • nip pieces 50a, 50b will tend to come closer to one another by compressing themselves because of the presence of the longitudinal slots 52. In this way, a nip is obtained in a direction substantially parallel to the longitudinal axis XX of the connecting rod which makes it possible to secure the first end 14a of the link 14 in the bore 24 of the pivot 10.
  • nip pieces 40, 50a, 50b of the two variants of this second embodiment of the invention are of substantially identical shapes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (11)

  1. Vorrichtung zur Steuerung einer Schaufel mit variablem Anstellwinkel für einen Turbomaschinenverdichter, umfassend einen Schwingarm (14), Mittel zum Befestigen eines ersten Endes (14a) des Schwingarms an einem Drehzapfen (10) einer zu steuernden Schaufel, sowie Verbindungsmittel (18) zwischen einem zweiten Ende (14b) des Schwingarms und einem Steuerring (16), wobei der Schwingarm (14) im wesentlichen zylindrisch ausgebildet ist, wobei das erste Ende (14a) des Schwingarms in eine Bohrung (24) des Drehzapfens (10) der Schaufel eingesteckt ist, und dadurch gekennzeichnet, daß die Vorrichtung ferner Mittel zum Festklemmen des ersten Endes (14a) des Schwingarms (14) in der Bohrung (24) des Drehzapfens aufweist, um dessen Befestigung an dem Drehzapfen sicherzustellen.
  2. Vorrichtung nach Anspruch 1, wobei die Festklemmittel ein Klemmen in einer zur Längsachse (X-X) des Schwingarms (14) im wesentlichen senkrechten Richtung ausüben.
  3. Vorrichtung nach Anspruch 2, die folgendes aufweist, nämlich einen Schlitz (26), der in dem Drehzapfen (10) der Schaufel in einer Ebene (P) ausgebildet ist, welche durch die Längsachse (X-X) des Schwingarms (14) verläuft und mittig zum Drehzapfen ist, eine Öffnung (28), die durch den Drehzapfen (10) der Schaufel hindurch in einer zur Ebene (P) des Schlitzes (26) im wesentlichen senkrechten Richtung ausgebildet ist, sowie eine Schraube (30), die in der Öffnung (28) des Drehzapfens angebracht und mittels einer Spannmutter (32) eingespannt ist, so daß ein Festklemmen des Schlitzes bewirkt wird.
  4. Vorrichtung nach Anspruch 3, wobei das erste Ende (14a) des Schwingarms (14) eine Vertiefung (36a, 36b) aufweist, welche dazu bestimmt ist, mit einem zylindrischen Teil des Körpers der Schraube (30) zusammenzuwirken, wenn diese in der Öffnung (28) des Drehzapfens (10) der Schaufel angebracht ist, um ein zusätzliches Festlegen des Schwingarms an dem Drehzapfen sicherzustellen.
  5. Vorrichtung nach einem der Ansprüche 3 und 4, wobei der Drehzapfen (10) der Schaufel eine im wesentlichen ebene Schulter (10a) aufweist, die dazu bestimmt ist, mit einer flachen Seite (34a) des Kopfes (34) der Schraube (30) zusammenzuwirken, wenn diese in der Öffnung (28) des Drehzapfens der Schaufel angebracht ist, um eine Festlegung gegen ein Drehen der Schraube in der Öffnung des Drehzapfens sicherzustellen.
  6. Vorrichtung nach Anspruch 1, wobei die Festklemmittel ein Klemmen in einer zur Längsachse (X-X) des Schwingarms (14) im wesentlichen parallelen Richtung ausüben.
  7. Vorrichtung nach Anspruch 6, wobei das erste Ende (14a) des Schwingarms (14) mit einem Gewinde versehen ist und die Bohrung (24) des Drehzapfens (10) der Schaufel zwei Endteile (24a, 24b) aufweist, die im wesentlichen die Form von sich zur Außenseite des Drehzapfens öffnenden Kegelstümpfen haben, wobei die Endteile durch einen im wesentlichen zylindrischen Mittelteil (24c) miteinander verbunden sind.
  8. Vorrichtung nach Anspruch 7, wobei das erste Ende (14a) des Schwingarms (14) einen Kragen (38) mit konischer Fläche aufweist, der mit einem der Endteile (24b) der Bohrung (24) des Drehzapfens (10) der Schaufel zusammenwirkt, und die Vorrichtung außerdem folgendes aufweist:
    - ein im wesentlichen kegelstumpfförmiges Festklemmteil (40), das um das erste Ende (14a) des Schwingarms (14) angebracht ist und mit dem anderen Endteil (24a) der Bohrung des Drehzapfens zusammenwirkt, wobei das Festklemmteil (40) Längsschlitze (42) aufweist, und
    - eine Spannmutter (44), die auf das erste Ende (14a) des Schwingarms (14) aufgeschraubt und an dem Festklemmteil festgezogen ist.
  9. Vorrichtung nach Anspruch 7, wobei das erste Ende (14a) des Schwingarms (14) einen einen Längsanschlag bildenden Kragen (48) aufweist und die Vorrichtung ferner folgendes umfaßt:
    - ein im wesentlichen kegelstumpfförmiges erstes Festklemmteil (50a), das um das erste Ende (14a) des Schwingarms (14) in Anschlag an dem Kragen (48) angebracht ist und mit einem der Endteile (24b) der Bohrung (24) des Drehzapfens (10) der Schaufel zusammenwirkt,
    - ein im wesentlichen kegelstumpfförmiges zweites Festklemmteil (50b), das um das erste Ende (14a) des Schwingarms (14) angebracht ist und mit dem anderen Endteil (24a) der Bohrung (24) des Drehzapfens der Schaufel zusammenwirkt, wobei die Festklemmteile (50a, 50b) jeweils Längsschlitze (52) aufweisen, und
    - eine Spannmutter (54), die auf das erste Ende (14a) des Schwingarms (14) aufgeschraubt und an dem zweiten Festklemmteil (50b) festgezogen ist.
  10. Verdichter einer Turbomaschine, der wenigstens eine Vorrichtung zur Steuerung einer Schaufel mit variablem Anstellwinkel nach einem der Ansprüche 1 bis 9 umfaßt.
  11. Turbomaschine, die wenigstens eine Vorrichtung zur Steuerung einer Schaufel mit variablem Anstellwinkel nach einem der Ansprüche 1 bis 9 umfaßt.
EP07113013A 2006-08-02 2007-07-24 Steuervorrichtung einer Schaufel mit verstellbaren Winkel für eine Turbomachine mit zylindrischer Pleuelstange Active EP1887188B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0653250A FR2904668B1 (fr) 2006-08-02 2006-08-02 Dispositif de commande d'aube a angle de calage variable de turbomachine a biellette cylindrique

Publications (2)

Publication Number Publication Date
EP1887188A1 EP1887188A1 (de) 2008-02-13
EP1887188B1 true EP1887188B1 (de) 2009-09-09

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US (1) US8087883B2 (de)
EP (1) EP1887188B1 (de)
DE (1) DE602007002347D1 (de)
FR (1) FR2904668B1 (de)

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CN103827507A (zh) * 2011-11-04 2014-05-28 三菱重工业株式会社 连杆机构及具有该连杆机构的可变静翼驱动装置

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EP3191715A1 (de) * 2014-09-12 2017-07-19 General Electric Company Axi-zentrifugalverdichter mit verstellbaren auslassleitschaufeln
FR3041714B1 (fr) * 2015-09-30 2020-02-14 Safran Aircraft Engines Compresseur de turbomachine, en particulier de turbopropulseur ou de turboreacteur d'avion
US11391298B2 (en) 2015-10-07 2022-07-19 General Electric Company Engine having variable pitch outlet guide vanes
US20170115782A1 (en) * 2015-10-23 2017-04-27 Microsoft Technology Licensing, Llc Combined grip and mobility sensing
US20180058247A1 (en) * 2016-08-23 2018-03-01 Borgwarner Inc. Vane actuator and method of making and using the same
BE1025470B1 (fr) * 2017-08-14 2019-03-18 Safran Aero Boosters S.A. Systeme d'aubes a calage variable de compresseur pour turbomachine
DE102017222205A1 (de) 2017-12-07 2019-06-13 MTU Aero Engines AG Verstellbare Turbomaschinenschaufel
DE102018202082A1 (de) 2018-02-09 2019-08-14 MTU Aero Engines AG Verbindungseinrichtung für eine verstellbare Schaufel einer Gasturbine
DE102021120382A1 (de) 2021-08-05 2023-02-09 MTU Aero Engines AG Verbindungseinrichtung einer verstellbaren Schaufel einer Gasturbine und Gasturbine
DE102021121462A1 (de) 2021-08-18 2023-02-23 MTU Aero Engines AG Verstellbare Leitschaufel für eine Gasturbine, Gasturbine und Verfahren zur Montage einer verstellbaren Leitschaufel für eine Gasturbine

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US9121415B2 (en) 2011-11-04 2015-09-01 Mitsubishi Hitachi Power Systems, Ltd. Link mechanism, and variable turbine vane driving unit having the same

Also Published As

Publication number Publication date
US20080031729A1 (en) 2008-02-07
EP1887188A1 (de) 2008-02-13
US8087883B2 (en) 2012-01-03
FR2904668A1 (fr) 2008-02-08
FR2904668B1 (fr) 2008-10-31
DE602007002347D1 (de) 2009-10-22

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