EP0696675B1 - Montageweise für einen Ring mit verstellbaren Leitschaufeln - Google Patents

Montageweise für einen Ring mit verstellbaren Leitschaufeln Download PDF

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Publication number
EP0696675B1
EP0696675B1 EP95401862A EP95401862A EP0696675B1 EP 0696675 B1 EP0696675 B1 EP 0696675B1 EP 95401862 A EP95401862 A EP 95401862A EP 95401862 A EP95401862 A EP 95401862A EP 0696675 B1 EP0696675 B1 EP 0696675B1
Authority
EP
European Patent Office
Prior art keywords
guide vanes
pivots
assembling
circular stage
ring
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
EP95401862A
Other languages
English (en)
French (fr)
Other versions
EP0696675A1 (de
Inventor
Jacques Robert Audet
Gérard Gabriel Miraucourt
Jean-Louis Charbonnel
Jean-Claude Prato
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
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA, SNECMA SAS filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of EP0696675A1 publication Critical patent/EP0696675A1/de
Application granted granted Critical
Publication of EP0696675B1 publication Critical patent/EP0696675B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F05D2250/10—Two-dimensional
    • F05D2250/14—Two-dimensional elliptical
    • F05D2250/141—Two-dimensional elliptical circular

Definitions

  • the invention relates to a device assembling a circular stage of pivoting vanes, often called variable pitch vanes and which found in a large number of modern turbomachines, usually on the first stages of the compressor, so to modify the gas flow characteristics according to the speeds of the machine.
  • the pivoting blades of the same stage are in general controlled by a common compound device a control ring and connecting rods hinged to the control ring and at the different blades and located around the blades, outside the stator which delimits the gas flow stream through which the blades extend; the other ends of the blades, adjacent to the rotor, are joined by an assembly annular.
  • This assembly was traditionally composed of two rings, one upstream and the other in downstream, which were brought together and assembled by bolts so as to trap the pivots between them vanes and bushings for pivoting. This solution was disadvantageous because of the number relatively large of bolts that was needed to the assembly of the rings and the additional weight which resulted.
  • US-A-4,395,195 describes a system for retaining the internal ends of blades pivoting composed of two groups of overlapping annular segments in the direction of the circumference, the internal segments joining at mid-length external segments.
  • the internal segments which are nested in the external segments are drilled and supported by individual washers associated with pivot grooves the ends of the pivoting vanes by preventing it from sliding and moving in the radial direction.
  • the annular structure can be separate from the rail or integrated into it.
  • the ring is advantageously continuous and the days are then of suitable forms so that one can mount the pivots in the ring.
  • the days are slots opening on one side of the ring or recesses comprising parts enlarged by which you can slide the intact parts, not notched by the grooves of the pivots.
  • the device constituting the invention and the adjacent parts of the machine are shown completely in Figures 1 and 2.
  • the vanes 1 with timing variable are distributed in circular stages between stages of the same shape of rotor blades 2 rigidly linked to a rotor 3.
  • the blades 1 are assigned to the flow straightening and are finished at the exterior by a control pivot 4 which passes through a stator cover 5 and ends outside of this by a hexagonal or square head 6 on which one engaged an operating key 7, to the end of a control rod 8 of which the other end slides through a pivoting shaft end 9 a control ring 10, the rotation of which around the machine axis rotates the connecting rods control 8 and the vanes 1 of the whole stage.
  • the vanes 1 are finished at their end opposite by a guide pivot 11 rotating in a bush 12 provided with circular shoulders 13 and 14 with its two ends.
  • the sleeve 12 is engaged in the holes 15 of a compound retaining ring 16, as seen in Figure 2, sectors 17 completed at their ends in the angular direction by a half of drilling. When sectors 17 are assembled, the drilling halves come together to form holes 15 complete in which the sockets 12 and the pivots 11 are trapped.
  • Sectors 17 are not not directly connected to each other, but strung in a rail 18 composed of two half-rings 19 attached between them by 20 bolts at their junctions.
  • the rail 18 has substantially a trough section forming a hollow 21. It is composed of a bottom 22 of edges of which stand two sides 23 and 24 of which each has a rim 25 or 26 which projects above from the bottom 22 and which surrounds a ledge, 27 or 28 respectively, outside sectors 17 to imprison them.
  • the sidewall 23 further comprises a internal rim 29, and the rim 27 and the flange 13 are trapped between the edges 25 and 29; and one outer edge 30 is arranged on the other side of the sectors 17 so that the rim 26 is trapped between the flanges 28 and 30 which are parallel.
  • the bottom 22 carries a layer of material 31 called abradable, i.e. easy to wear or erode, on its internal face, in front of wipers 32 in the form of circular ridge, which stand up from the rotor 3.
  • abradable i.e. easy to wear or erode
  • wipers 32 touch easy wear material 31 during the service of the machine, rub on it and wear it out by shaping it to their shape leaving subsist that a very slight game that almost opposes perfect for leaks at this point in the machine.
  • a ring 33 is housed in the recess 21 and engaged in grooves 34 pivots 11.
  • the ring 33 is continuous over its entire circumference and therefore common to all pivots 11.
  • Figure 3 shows a concrete example of realization which makes it possible to carry out the assembly: the ring 33 is provided with 35 days composed of a part wide 36, with a diameter greater than that of the pivots 11, which can therefore be engaged through the ring 33 at this place, and a narrow part 37 whose width is less than the diameter of the pivots 11 but greater than throat bottom diameter 34.
  • the narrow parts 37 and wide 36 of each day 35 are contiguous and successive on the circumference of the ring 33, a rotational movement of the ring 33 allows, after having driven the pivots 11 through the parts wide 36 so that the grooves 34, 33 arrive at height of the ring 33, to send the edges 38 of the narrow parts 37 in the grooves 34 to retain thus the vanes 1 in the radial direction of the machine.
  • Figure 4 shows that other designs are possible to ensure the same holding effect, and that especially the 35 days in form of recesses in the center of the ring 33 can be replaced by slots 39 whose width is identical to that of the narrow parts 37 and which extend sideways to one of the edges of the ring 33.
  • the ring 33 is then embedded in the grooves 34 by a movement in the axis of the machine.
  • FIG. 6 shows a variant where the rail 18 'is modified: the side 23 is absent and the other flank 24 'is different because its edge 26' is oriented towards the outside of the recess 21; ledges 28 ' and 30 'of sectors 17' of ring 16 'are then directed into the interior of the assembly to trap this rim 26 '.
  • Side 23 is replaced by an extension 50 of sectors 17 'at this location so keep the junction with the 18 'rail and cover the hollow 21.
  • the bottom 22 of the rail 18 is now provided with a flange 51 oriented towards the outside of the assembly and engaged between two overlapping edges 52 and 53 of the extension 50.
  • the ring 33 separated from the rail 18 can be guaranteed against accidental displacement in service which could cause disassembly of the assembly.

Landscapes

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

Claims (8)

  1. Montagevorrichtung für eine kreisförmige Schaufelstufe mit verschwenkbaren Schaufeln (1) mit einem Satz von Sektoren (17, 17'), die zu einem Ring (16, 16') verbunden und mit Ausnehmungen (15) zur Aufnahme der Drehlagerbuchsen (12) für die Drehzapfen (11) der Schaufeln (1) ausgestattet sind, ferner mit Kehlen (34) in diesen Drehzapfen (11) sowie mit einer ringförmigen Schiene (18, 18'), an der die Sektoren gehalten sind,
       gekennzeichnet durch
       eine mit Öffnungen (35, 39, 47) versehene ringförmige Struktur (33, 43), wobei an diese Öffnungen angrenzende Teile (38, 48) der ringförmigen Struktur in die Kehlen der Drehzapfen (11) eingreifen.
  2. Montagevorrichtung für eine kreisförmige Schaufelstufe mit verschwenkbaren Schaufeln nach Anspruch 1, dadurch gekennzeichnet, daß die Schiene einen hohlen Querschnitt (21) hat und einen Bodenteil (22) aufweist, der die Drehzapfen (11) abdeckt, wobei die ringförmige Struktur (33, 43) zwischen dem Boden (22) und den genannten Sektoren (17, 17') angeordnet ist.
  3. Montagevorrichtung für eine kreisförmige Schaufelstufe mit verschwenkbaren Schaufeln nach Anspruch 2, dadurch gekennzeichnet, daß der Bodenteil (22) eine Schicht (31) aus einem Verschleißmaterial trägt, die zu einer Dichtungsanordnung (32) gehört.
  4. Montagevorrichtung für eine kreisförmige Schaufelstufe mit verschwenkbaren Schaufeln nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die ringförmige Struktur (33) ein von der Schiene (18) getrennter durchlaufender Ring ist.
  5. Montagevorrichtung für eine kreisförmige Schaufelstufe mit verschwenkbaren Schaufeln nach Anspruch 4, dadurch gekennzeichnet, daß die Öffnungen aus zwei benachbarten Abschnitten bestehen, von denen der erste (36) größer als der Durchmesser der Drehzapfen und der zweite (37) schmaler als der Durchmesser der Drehzapfen mit Ausnahme der Kehlen (34) ist.
  6. Montagevorrichtung für eine kreisförmige Schaufelstufe mit verschwenkbaren Schaufeln nach Anspruch 4, dadurch gekennzeichnet, daß die Öffnungen (39) Schlitze sind, die auf einer der Seiten des Rings münden.
  7. Montagevorrichtung für eine kreisförmige Schaufelstufe mit verschwenkbaren Schaufeln nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die ringförmige Struktur (43) in die Schiene (18, 18') integriert ist.
  8. Montagevorrichtung für eine kreisförmige Schaufelstufe mit verschwenkbaren Schaufeln nach Anspruch 2 und 7, dadurch gekennzeichnet, daß die ringförmige Struktur einen Querschnitt in Form eines doppelten Winkelprofils hat, wobei die Winkel (44) jeweils aus einem von dem Boden (22) aufragenden ersten Steg (45) und einem zweiten Steg (46) bestehen und wobei die ersten Stege parallel verlaufen und die zweiten Stege auf gleichen und Zylinderflächen liegen, ausgehend von den ersten Stegen, einander zugewandt sind.
EP95401862A 1994-08-10 1995-08-09 Montageweise für einen Ring mit verstellbaren Leitschaufeln Expired - Lifetime EP0696675B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9409867A FR2723614B1 (fr) 1994-08-10 1994-08-10 Dispositif d'assemblage d'un etage circulaire d'aubes pivotantes.
FR9409867 1994-08-10

Publications (2)

Publication Number Publication Date
EP0696675A1 EP0696675A1 (de) 1996-02-14
EP0696675B1 true EP0696675B1 (de) 1998-09-30

Family

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EP95401862A Expired - Lifetime EP0696675B1 (de) 1994-08-10 1995-08-09 Montageweise für einen Ring mit verstellbaren Leitschaufeln

Country Status (4)

Country Link
US (1) US5636968A (de)
EP (1) EP0696675B1 (de)
DE (1) DE69505074T2 (de)
FR (1) FR2723614B1 (de)

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EP2787180A1 (de) * 2013-04-04 2014-10-08 MTU Aero Engines GmbH Leitschaufelanordnung für eine Turbomaschine
DE102013222980A1 (de) * 2013-11-12 2015-06-11 MTU Aero Engines AG Leitschaufel für eine Strömungsmaschine mit einer Dichtungsvorrichtung, Leitrad sowie Strömungsmaschine
FR3014152B1 (fr) 2013-11-29 2015-12-25 Snecma Dispositif de guidage d'aubes de redresseur a angle de calage variable de turbomachine et procede d'assemblage d'un tel dispositif
EP2952693B1 (de) 2014-06-06 2021-04-28 Raytheon Technologies Corporation Gehäuse mit schaufelrückhaltemittel
DE102014223975A1 (de) * 2014-11-25 2016-05-25 MTU Aero Engines AG Leitschaufelkranz und Strömungsmaschine
EP3170987B1 (de) * 2015-11-17 2020-02-19 MTU Aero Engines GmbH Innenringsystem für eine strömungsmaschine
US10393145B2 (en) 2016-03-02 2019-08-27 General Electric Company Asymmetric alignment system for a variable stator vane
DE102016215807A1 (de) * 2016-08-23 2018-03-01 MTU Aero Engines AG Innenring für einen Leitschaufelkranz einer Strömungsmaschine
EP3315729A1 (de) * 2016-10-26 2018-05-02 MTU Aero Engines GmbH Ellipsoidische innere leitschaufellagerung
DE102017109952A1 (de) * 2017-05-09 2018-11-15 Rolls-Royce Deutschland Ltd & Co Kg Rotorvorrichtung einer Strömungsmaschine
DE102017222209A1 (de) * 2017-12-07 2019-06-13 MTU Aero Engines AG Leitschaufelanbindung sowie Strömungsmaschine
DE102018202119A1 (de) 2018-02-12 2019-08-14 MTU Aero Engines AG Hebelanbindung einer Leitschaufelverstellung für Strömungsmaschinen
DE102018203442A1 (de) 2018-03-07 2019-09-12 MTU Aero Engines AG Innenring für eine Turbomaschine, Leitschaufelkranz mit einem Innenring, Turbomaschine und Verfahren zur Herstellung eines Innenrings
DE102018210601A1 (de) * 2018-06-28 2020-01-02 MTU Aero Engines AG Segmentring zur montage in einer strömungsmaschine
FR3085060B1 (fr) 2018-08-17 2020-10-09 Safran Aircraft Engines Anneau de guidage d'aubes a calage variable et procede de montage dudit anneau
DE102018213983A1 (de) * 2018-08-20 2020-02-20 MTU Aero Engines AG Verstellbare Leitschaufelanordnung, Leitschaufel, Dichtungsträger und Turbomaschine
US10746041B2 (en) 2019-01-10 2020-08-18 Raytheon Technologies Corporation Shroud and shroud assembly process for variable vane assemblies
CN110656981B (zh) * 2019-10-09 2022-03-25 莱芜钢铁集团有限公司 一种trt静叶可调机构定位方法
CN112065777B (zh) * 2020-11-10 2021-01-19 中国航发上海商用航空发动机制造有限责任公司 压气机进口导流叶片的调节精度保持结构
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Also Published As

Publication number Publication date
EP0696675A1 (de) 1996-02-14
DE69505074D1 (de) 1998-11-05
FR2723614A1 (fr) 1996-02-16
US5636968A (en) 1997-06-10
DE69505074T2 (de) 1999-03-11
FR2723614B1 (fr) 1996-09-13

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