EP0455559A1 - Device for the supply of combustion air to a gas turbine - Google Patents

Device for the supply of combustion air to a gas turbine Download PDF

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Publication number
EP0455559A1
EP0455559A1 EP91401167A EP91401167A EP0455559A1 EP 0455559 A1 EP0455559 A1 EP 0455559A1 EP 91401167 A EP91401167 A EP 91401167A EP 91401167 A EP91401167 A EP 91401167A EP 0455559 A1 EP0455559 A1 EP 0455559A1
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EP
European Patent Office
Prior art keywords
pivoting
diaphragms
adjusting
piston
combustion chamber
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
EP91401167A
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German (de)
French (fr)
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EP0455559B1 (en
Inventor
Alexandre Forestier
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Safran Aircraft Engines SAS
Original Assignee
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
SNECMA SAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
    • F23R3/26—Controlling the air flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
    • F23R3/46—Combustion chambers comprising an annular arrangement of several essentially tubular flame tubes within a common annular casing or within individual casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/40—Movement of component
    • F05B2250/41—Movement of component with one degree of freedom
    • F05B2250/411—Movement of component with one degree of freedom in rotation

Definitions

  • Known gas turbines are provided with oxidant supply devices whose flow rate is adjustable by means of pivoting diaphragms.
  • FR-A-2 572 463 describes and represents such diaphragms.
  • the present invention relates to a device for supplying oxidant, such as air, to a combustion chamber of a gas turbine, comprising in particular a plurality of diaphragms for adjusting the quantity of oxidant admitted into the combustion chamber, each diaphragm comprising a crown, which is pivotally mounted relative to the casing of the gas turbine, the pivoting of which constitutes the means of adjusting the cross-section for the passage of the oxidant into the combustion chamber, and which is coupled to a device for controlling its pivoting.
  • oxidant such as air
  • the subject of the invention is the adoption of the provisions according to which at least certain diaphragms are grouped into two adjacent diaphragms, the two crowns of the diaphragms of a group of two diaphragms each include, a member for adjusting the pivoting of said crown; and, finally, the members for adjusting the pivoting of the two rings of the two said diaphragms are coupled to a single control member belonging to said device for controlling the pivoting.
  • the main advantage of a feeding device according to the invention lies in its simplicity and compactness, and consequently in the saving in weight and cost price achieved.
  • the gas turbine the combustion chamber of which is represented, in cross section, by a circular ring 1, is provided with oxidizer supply devices 2, here in even number (16 devices), grouped in pairs.
  • Each device 2 for supplying oxidant in air in the embodiment shown, comprises a fixed cylindrical ring 3, provided with inlet passages 4 for the oxidant inside the combustion chamber 5, and a ring 6, which is pivotally mounted around the axis 7 of the fixed crown 3 which surrounds said fixed crown 3 and which is provided with passages 8 capable of being arranged opposite the intake passages 4 of the fixed crown and thus allowing admission of the oxidant in the combustion chamber 5 or, on the contrary, as a function of the relative position of the crowns 3 and 6, to no longer be disposed opposite said intake passages 4, and then to remove, or reduce, the combustion of the oxidant in the combustion chamber.
  • the assembly of a fixed crown 3 and the associated pivoting crown 6 is often also called a "diaphragm".
  • the illustrated embodiment is only for example.
  • Each pivoting ring 6 is provided with an arm 9, which constitutes a member for adjusting its pivoting and which is provided with an oblong slot 10.
  • a first piston rod 11, integral with a piston 12, is associated with the two arm 9 of each group of two oxidant supply devices 2, by means of a shaft 13 introduced concomitantly into the openings 10 of the two said arms 9 and into a bore 14, which is provided with the free end of the first rod piston 11.
  • the two spokes passing through the pivot axis 7 and through the axis of the shaft 13 of a group of two oxidizer supply devices 2 form an angle 2A between them, and each form, with the axis 15 of the first piston rod 11, an angle A, so that said axis 15 of this first piston rod 11 constitutes the bisector of the angle of said two radii.
  • Each piston 12 is slidably mounted in a cylinder 16, in a direction substantially radial with respect to the wall 1 of the combustion chamber and parallel to the axis 15 of the first piston rod 11, the latter passing through without sealing, with a slight clearance J, the wall 1 and the cylinder 16 being moreover fixed to the wall 1 by screws 17.
  • a deformable bellows 18 is contained in the chamber 19 delimited inside the cylinder 16, surrounds the first piston rod 11 and, secured with tightness to the piston 12 and to the bottom 20 of the cylinder which is fixed to the wall 1, itself delimits, inside the cylinder 16, a working chamber 21, which is in permanent communication, by the 'through play J, with combustion chamber 5.
  • This cam 25 is integral with a support 29 which is pivotally mounted relative to the cylinder 16 about an axis 26 parallel to the common axis 15 of the two piston rods 11 and 22, by means of a bearing pivot 27 fixed to the body of the cylinder 16 by a screw 28.
  • a pinion 30 is also integral with the support 29 of the cam and cooperates with a screw end 31.
  • the assembly of the jack constituted by the cylinder 16 and the piston, the two piston rods 11 and 22, the cam 25, its support 29, and the pinions 30 and worm 31, constitutes the control device 32 pivoting of the two pivoting rings 6 of a group of two oxidizing feed devices 2.
  • the worms 31 of the various control devices 32 are also connected to each other by flexible connections 33, as well as to a single drive device 34, comprising a motor for driving one in rotation, and consequently of each of the endless screws 31.
  • the embodiment which has just been described is compact since a single control device 32 controls the pivoting of the two pivoting rings 6 of two oxidizer or diaphragm supply devices 2.
  • a single drive device 34 allows the adjustment of the positions of all the cams 25. This compact embodiment is therefore also light and at a relatively moderate cost price. It will have been noted that the pressurized gas contained in the enclosure of the combustion chamber casing reaches the working chamber 21 of each cylinder via the clearance J and places the end 22A of each second rod in abutment. piston 22 on the face 24 of the cam 25, thus having an antagonistic effect to that of said cam.

Abstract

The invention relates to a device for the supply of combustion air to a combustion chamber (5) of a gas turbine, the supply device comprising in particular a plurality of diaphragms (2) for regulating the quantity of combustion air admitted into said combustion chamber, each diaphragm comprising a ring (6) which is mounted pivotably in relation to the casing of the gas turbine, the pivoting of which consititutes the means of regulating the cross-section of the passage for admission of the combustion air into the combustion chamber, and which is connected to a device (32) for controlling its pivoting. …<??>According to the invention, certain diaphragms (2) at least are in groups of two adjacent diaphragms, the two rings (6) of the diaphragms (2) of a group of two diaphragms each comprise a member (9) for regulating the pivoting of said ring, and the members (9) for regulating the pivoting of the two rings (6) of said two diaphragms are connected to a single control member (11) belonging to said pivoting-control device (32). …<??>One application is the production of a compact and light gas turbine. …<IMAGE>…

Description

Les turbines à gaz connues sont munies de dispositifs d'alimentation en comburant dont le débit est réglable au moyen de diaphragmes pivotants. FR-A-2 572 463 décrit et représente de tels diaphragmes.Known gas turbines are provided with oxidant supply devices whose flow rate is adjustable by means of pivoting diaphragms. FR-A-2 572 463 describes and represents such diaphragms.

La présente invention est relative à un dispositif d'alimentation en comburant, tel que de l'air, d'une chambre de combustion d'une turbine à gaz, comprenant notamment une pluralité de diaphragmes de réglage de la quantité de comburant admis dans la chambre de combustion, chaque diaphragme comportant une couronne, qui est montée pivotante par rapport au carter de la turbine à gaz, dont le pivotement constitue le moyen de réglage de la section de passage d'admission du comburant dans la chambre de combustion, et qui est attelée à un dispositif de commande de son pivotement.The present invention relates to a device for supplying oxidant, such as air, to a combustion chamber of a gas turbine, comprising in particular a plurality of diaphragms for adjusting the quantity of oxidant admitted into the combustion chamber, each diaphragm comprising a crown, which is pivotally mounted relative to the casing of the gas turbine, the pivoting of which constitutes the means of adjusting the cross-section for the passage of the oxidant into the combustion chamber, and which is coupled to a device for controlling its pivoting.

Dans un tel dispositif d'alimentation en comburant, l'invention à pour objet l'adoption des dispositions selon lesquelles certains diaphragmes au moins sont regroupés en deux diaphragmes adjacents, les deux couronnes des diaphragmes d'un groupe de deux diaphragmes comportent, chacune, un organe de réglage du pivotement de ladite couronne ; et, enfin, les organes de réglage du pivotement des deux couronnes des deux dits diaphragmes sont attelés à un organe de commande unique appartenant audit dispositif de commande du pivotement.In such an oxidizer supply device, the subject of the invention is the adoption of the provisions according to which at least certain diaphragms are grouped into two adjacent diaphragms, the two crowns of the diaphragms of a group of two diaphragms each include, a member for adjusting the pivoting of said crown; and, finally, the members for adjusting the pivoting of the two rings of the two said diaphragms are coupled to a single control member belonging to said device for controlling the pivoting.

Les avantageuses dispositions suivantes sont en outre préférées :

  • chaque organe de réglage du pivotement comprend une lumière, qui s'étend radialement par rapport à l'axe du pivotement de la couronne correspondante, cependant que ledit organe de commande unique comprend un arbre introduit concomitamment dans les deux lumières des organes de réglage du pivotement des deux couronnes d'un groupe de deux diaphragmes et comprend également un vérin linéaire comportant une tige de commande à laquelle est attelé ledit arbre ;
  • ladite tige de commande est sensiblement alignée avec la bissectrice de l'angle formé par les deux rayons passant par ledit arbre et par l'axe de pivotement de chacune des deux dites couronnes ;
  • ledit vérin est un vérin à fluide comprenant un cylindre fixé sur le carter de la turbine à gaz ; un piston, qui est monté coulissant à l'intérieur dudit cylindre et qui y délimite une chambre de travail ; et une tige de piston qui est solidaire dudit piston, et qui fait saillie à l'extérieur du cylindre et constitue ladite tige de commande à laquelle est attelé ledit arbre, la chambre de travail communiquant avec l'enceinte du carter de la chambre de combustion, de sorte que le fluide sous pression susceptible d'être contenu dans l'enceinte du carter de la chambre de combustion a un effet de poussée dans un premier sens sur le piston et sur la tige de piston qui en est solidaire ;
  • une autre tige de piston est solidaire du piston dudit vérin à fluide et présente une extrémité qui coopère avec la face active d'une came de commande, l'effet de ladite came de commande sur ladite autre tige de piston étant antagoniste de celui du fluide sous pression susceptible d'être contenu dans la chambre de travail du vérin ;
  • ladite came de commande est montée pivotante par rapport au carter de la turbine à gaz autour d'un axe et est attelée à un dispositif de réglage de son pivotement ;
  • le dispositif de réglage du pivotement de la came est du type à pignon et vis sans fin ;
  • les vis sans fin des dispositifs de réglage du pivotement des cames des divers groupes de deux diaphragmes sont reliées les unes aux autres par une liaison flexible, cependant qu'un dispositif d'entraînement unique est attelé à ladite liaison flexible en vue de l'entraînement simultané de l'ensemble des dispositifs du réglage du pivotement des diverses cames.
The following advantageous arrangements are also preferred:
  • each pivot adjustment member comprises a light, which extends radially with respect to the axis of pivoting of the corresponding crown, while said single control member comprises a shaft introduced concomitantly into the two openings of the pivot adjustment members two crowns of a group of two diaphragms and also comprises a linear cylinder comprising a control rod to which said shaft is coupled;
  • said control rod is substantially aligned with the bisector of the angle formed by the two rays passing through said shaft and by the pivot axis of each of the two said rings;
  • said cylinder is a fluid cylinder comprising a cylinder fixed to the casing of the gas turbine; a piston, which is slidably mounted inside said cylinder and which delimits a working chamber there; and a piston rod which is integral with said piston, and which projects outside the cylinder and constitutes said control rod to which said shaft is coupled, the working chamber communicating with the enclosure of the combustion chamber housing. , so that the pressurized fluid capable of being contained in the enclosure of the combustion chamber housing has a pushing effect in a first direction on the piston and on the piston rod which is integral therewith;
  • another piston rod is integral with the piston of said fluid cylinder and has one end which cooperates with the active face of a control cam, the effect of said control cam on said other piston rod being antagonistic to that of the fluid under pressure likely to be contained in the working chamber of the jack;
  • said control cam is pivotally mounted relative to the casing of the gas turbine about an axis and is coupled to a device for adjusting its pivoting;
  • the cam pivot adjustment device is of the pinion and worm type;
  • the worms of the devices for adjusting the pivoting of the cams of the various groups of two diaphragms are connected to each other by a flexible connection, while a single driving device is coupled to said flexible connection for driving of all the devices for adjusting the pivoting of the various cams.

L'avantage principal d'un dispositif d'alimentation conforme à l'invention réside dans sa simplicité et sa compacité, et par suite dans l'économie de poids et de prix de revient réalisée.The main advantage of a feeding device according to the invention lies in its simplicity and compactness, and consequently in the saving in weight and cost price achieved.

L'invention sera mieux comprise, et des caractéristiques secondaires et leurs avantages apparaîtront au cours de la description d'une réalisation donnée ci-dessous à titre d'exemple.The invention will be better understood, and secondary characteristics and their advantages will appear during the description of an embodiment given below by way of example.

Il est entendu que la description et les dessins ne sont donnés qu'à titre indicatif et non limitatif.It is understood that the description and the drawings are given for information only and are not limiting.

Il sera fait référence aux dessins annexés, dans lesquels :

  • la figure 1 est une coupe transversale partielle d'une turbine à gaz munie d'un dispositif d'alimentation en comburant conforme à l'invention ;
  • la figure 2 est une coupe transversale de ladite turbine à gaz montrant des détails de réalisation du dispositif d'alimentation en comburant conforme à l'invention ;
  • la figure 3 est une coupe suivant III-III de la figure 2 ; et
  • la figure 4 est une coupe suivant IV-IV de la figure 2.
Reference will be made to the accompanying drawings, in which:
  • Figure 1 is a partial cross section of a gas turbine provided with an oxidant supply device according to the invention;
  • Figure 2 is a cross section of said gas turbine showing details of embodiment of the oxidizer supply device according to the invention;
  • Figure 3 is a section along III-III of Figure 2; and
  • FIG. 4 is a section along IV-IV of FIG. 2.

La turbine à gaz dont la chambre de combustion est représentée, en coupe transversale, par une couronne circulaire 1, est munie de dispositifs d'alimentation en comburant 2, ici en nombre pair (16 dispositifs), groupés par paires.The gas turbine, the combustion chamber of which is represented, in cross section, by a circular ring 1, is provided with oxidizer supply devices 2, here in even number (16 devices), grouped in pairs.

Chaque dispositif 2 d'alimentation en comburant, en air dans la réalisation représentée, comporte une couronne cylindrique fixe 3, munie de passages d'admission 4 du comburant à l'intérieur de la chambre de combustion 5, et une couronne 6, qui est montée pivotante autour de l'axe 7 de la couronne fixe 3 qui entoure ladite couronne fixe 3 et qui est munie de passages 8 susceptibles d'être disposés en regard des passages d'admission 4 de la couronne fixe et ainsi de permettre l'admission du comburant dans la chambre de combustion 5 ou, au contraire, en fonction de la position relative de couronnes 3 et 6, de n'être plus disposés en regard desdits passages d'admission 4, et alors de supprimer, ou de réduire, l'admission du comburant dans la chambre de combustion. L'ensemble d'une couronne fixe 3 et de la couronne pivotante associée 6 est souvent également appelé "diaphragme". La réalisation représentée ne l'est qu'à titre d'exemple.Each device 2 for supplying oxidant, in air in the embodiment shown, comprises a fixed cylindrical ring 3, provided with inlet passages 4 for the oxidant inside the combustion chamber 5, and a ring 6, which is pivotally mounted around the axis 7 of the fixed crown 3 which surrounds said fixed crown 3 and which is provided with passages 8 capable of being arranged opposite the intake passages 4 of the fixed crown and thus allowing admission of the oxidant in the combustion chamber 5 or, on the contrary, as a function of the relative position of the crowns 3 and 6, to no longer be disposed opposite said intake passages 4, and then to remove, or reduce, the combustion of the oxidant in the combustion chamber. The assembly of a fixed crown 3 and the associated pivoting crown 6 is often also called a "diaphragm". The illustrated embodiment is only for example.

Chaque couronne pivotante 6 est munie d'un bras 9, qui constitue un organe de réglage de son pivotement et qui est muni d'une lumière oblongue 10. Une première tige 11 de piston, solidaire d'un piston 12, est associée aux deux bras 9 de chaque groupe de deux dispositifs 2 d'alimentation en comburant, au moyen d'un arbre 13 introduit concomitamment dans les lumières 10 des deux dits bras 9 et dans un alésage 14, dont est munie l'extrémité libre de la première tige de piston 11.Each pivoting ring 6 is provided with an arm 9, which constitutes a member for adjusting its pivoting and which is provided with an oblong slot 10. A first piston rod 11, integral with a piston 12, is associated with the two arm 9 of each group of two oxidant supply devices 2, by means of a shaft 13 introduced concomitantly into the openings 10 of the two said arms 9 and into a bore 14, which is provided with the free end of the first rod piston 11.

Les deux rayons passant par l'axe de pivotement 7 et par l'axe de l'arbre 13 d'un groupe de deux dispositifs 2 d'alimentation en comburant forment entre eux un angle 2A, et forment chacun, avec l'axe 15 de la première tige de piston 11, un angle A, de sorte que ledit axe 15 de cette première tige de piston 11 constitue la bissectrice de l'angle desdits deux rayons.The two spokes passing through the pivot axis 7 and through the axis of the shaft 13 of a group of two oxidizer supply devices 2 form an angle 2A between them, and each form, with the axis 15 of the first piston rod 11, an angle A, so that said axis 15 of this first piston rod 11 constitutes the bisector of the angle of said two radii.

Chaque piston 12 est monté coulissant dans un cylindre 16, selon une direction sensiblement radiale par rapport à la paroi 1 de la chambre de combustion et parallèle à l'axe 15 de la première tige de piston 11, celle-ci traversant sans étanchéité, avec un léger jeu J, la paroi 1 et le cylindre 16 étant par ailleurs fixé sur la paroi 1 par des vis 17. Un soufflet déformable 18 est contenu dans la chambre 19 délimitée à l'intérieur du cylindre 16, entoure la première tige de piston 11 et, assujetti avec étanchéité au piston 12 et au fond 20 du cylindre qui est fixé sur la paroi 1, délimite lui-même, à l'intérieur au cylindre 16, une chambre de travail 21, qui est en communication permanente, par l'intermédiaire du jeu J, avec la chambre de combustion 5.Each piston 12 is slidably mounted in a cylinder 16, in a direction substantially radial with respect to the wall 1 of the combustion chamber and parallel to the axis 15 of the first piston rod 11, the latter passing through without sealing, with a slight clearance J, the wall 1 and the cylinder 16 being moreover fixed to the wall 1 by screws 17. A deformable bellows 18 is contained in the chamber 19 delimited inside the cylinder 16, surrounds the first piston rod 11 and, secured with tightness to the piston 12 and to the bottom 20 of the cylinder which is fixed to the wall 1, itself delimits, inside the cylinder 16, a working chamber 21, which is in permanent communication, by the 'through play J, with combustion chamber 5.

Une deuxième tige de piston 22, coaxiale à la première tige de piston 11, solidaire également du piston 12, traverse le fond 23 du cylindre 16, opposé au fond 20, et a son extrémité 22A en appui sur la face 24 d'une came 25. Cette came 25 est solidaire d'un support 29 qui est monté pivotant par rapport au cylindre 16 autour d'un axe 26 parallèle à l'axe 15 commun des deux tiges de piston 11 et 22, au moyen d'un palier de pivotement 27 fixé sur le corps du cylindre 16 par une vis 28. Un pignon 30 est également solidaire du support 29 de la came et coopère avec une vis sans fin 31. L'ensemble du vérin constitué par le cylindre 16 et le piston, les deux tiges de piston 11 et 22, la came 25, son support 29, et les pignons 30 et vis sans fin 31, constitue le dispositif de commande 32 des pivotements des deux couronnes pivotantes 6 d'un groupe de deux dispositifs d'alimentation 2 en comburant.A second piston rod 22, coaxial with the first piston rod 11, also integral with the piston 12, passes through the bottom 23 of the cylinder 16, opposite the bottom 20, and at its end 22A bears on the face 24 of a cam 25. This cam 25 is integral with a support 29 which is pivotally mounted relative to the cylinder 16 about an axis 26 parallel to the common axis 15 of the two piston rods 11 and 22, by means of a bearing pivot 27 fixed to the body of the cylinder 16 by a screw 28. A pinion 30 is also integral with the support 29 of the cam and cooperates with a screw end 31. The assembly of the jack constituted by the cylinder 16 and the piston, the two piston rods 11 and 22, the cam 25, its support 29, and the pinions 30 and worm 31, constitutes the control device 32 pivoting of the two pivoting rings 6 of a group of two oxidizing feed devices 2.

Les vis sans fin 31 des divers dispositifs de commande 32 sont en outre reliées les unes aux autres par des liaisons flexibles 33, ainsi qu'à un dispositif d'entraînement unique 34, comprenant un moteur d'entraînement en rotation de l'une, et par conséquent de chacune des vis sans fin 31.The worms 31 of the various control devices 32 are also connected to each other by flexible connections 33, as well as to a single drive device 34, comprising a motor for driving one in rotation, and consequently of each of the endless screws 31.

La réalisation qui vient d'être décrite est compacte puisqu'un seul dispositif de commande 32 commande le pivotement des deux couronnes pivotantes 6 de deux dispositifs d'alimentation en comburant ou diaphragmes 2. En outre, un seul dispositif d'entraînement 34 permet le réglage des positions de toutes les cames 25. Cette réalisation compacte est donc en outre légère et a un prix de revient relativement modéré. Il aura été noté que le gaz sous pression contenu dans l'enceinte du carter de la chambre de combustion parvient dans la chambre de travail 21 de chaque vérin par l'intermédiaire du jeu J et met en appui l'extrémité 22A de chaque deuxième tige de piston 22 sur la face 24 de la came 25, en ayant ainsi un effet antagoniste de celui de ladite came.The embodiment which has just been described is compact since a single control device 32 controls the pivoting of the two pivoting rings 6 of two oxidizer or diaphragm supply devices 2. In addition, a single drive device 34 allows the adjustment of the positions of all the cams 25. This compact embodiment is therefore also light and at a relatively moderate cost price. It will have been noted that the pressurized gas contained in the enclosure of the combustion chamber casing reaches the working chamber 21 of each cylinder via the clearance J and places the end 22A of each second rod in abutment. piston 22 on the face 24 of the cam 25, thus having an antagonistic effect to that of said cam.

L'invention n'est pas limitée à la réalisation décrite, mais en couvre au contraire toutes les variantes qui pourraient lui être apportées sans sortir de son cadre, ni de son esprit.The invention is not limited to the embodiment described, but on the contrary covers all the variants which could be made to it without departing from its scope or its spirit.

Claims (8)

Dispositif d'alimentation en comburant, tel que de l'air, d'une chambre de combustion d'une turbine à gaz, dispositif d'alimentation comprenant notamment une pluralité de diaphragmes de réglage (2) de la quantité de comburant admis dans ladite chambre de combustion (5), chaque diaphragme comportant une couronne (6), qui est montée pivotante par rapport au carter de la turbine à gaz, dont le pivotement constitue le moyen de réglage de la section de passage d'admission du comburant dans la chambre de combustion, et qui est attelée à un dispositif (32) de commande de son pivotement,
caractérisé en ce que : a) certains diaphragmes (2) au moins sont regroupés en deux diaphragmes adjacents ; b) les deux couronnes (6) des diaphragmes (2) d'un groupe de deux diaphragmes comportent, chacune, un organe (9) de réglage du pivotement de ladite couronne ; et, c) les organes (9) de réglage du pivotement des deux couronnes (6) des deux dits diaphragmes sont attelés à un organe de commande unique (11) appartenant audit dispositif de commande du pivotement (32). Device for supplying oxidant, such as air, to a combustion chamber of a gas turbine, supply device comprising in particular a plurality of diaphragms for adjusting (2) the quantity of oxidant admitted into said combustion chamber (5), each diaphragm comprising a crown (6), which is pivotally mounted relative to the casing of the gas turbine, the pivoting of which constitutes the means of adjusting the cross-section of the oxidant inlet passage in the combustion chamber, and which is coupled to a device (32) for controlling its pivoting,
characterized in that: a) at least some diaphragms (2) are grouped into two adjacent diaphragms; b) the two crowns (6) of the diaphragms (2) of a group of two diaphragms each comprise a member (9) for adjusting the pivoting of said crown; and, c) the members (9) for adjusting the pivoting of the two crowns (6) of the two said diaphragms are coupled to a single control member (11) belonging to said pivoting control device (32). Dispositif selon la revendication 1, caractérisé en ce que chaque organe (9) de réglage du pivotement comprend une lumière (10), qui s'étend radialement par rapport à l'axe (7) du pivotement de la couronne correspondante, cependant que ledit organe de commande unique (11) comprend un arbre (13) introduit concomitamment dans les deux lumières (10) des organes de réglage du pivotement des deux couronnes d'un groupe de deux diaphragmes et comprend également un vérin linéaire (12-16) comportant une tige de commande (11) à laquelle est attelé ledit arbre (13).Device according to claim 1, characterized in that each member (9) for adjusting the pivoting comprises a light (10), which extends radially with respect to the axis (7) of the pivoting of the corresponding crown, while the said single control member (11) comprises a shaft (13) introduced concomitantly into the two openings (10) of the members for adjusting the pivoting of the two crowns of a group of two diaphragms and also comprises a linear jack (12-16) comprising a control rod (11) to which said shaft (13) is coupled. Dispositif selon la revendication 2, caractérisé en ce que ladite tige de commande (11) est sensiblement alignée avec la bissectrice (15) de l'angle (2A) formé par les deux rayons (7-13, 7-13) passant par ledit arbre (13) et par l'axe (7) de pivotement de chacune des deux dites couronnes.Device according to claim 2, characterized in that said control rod (11) is substantially aligned with the bisector (15) of the angle (2A) formed by the two rays (7-13, 7-13) passing through said shaft (13) and by the pivot axis (7) of each of the two said crowns. Dispositif selon l'une quelconque des revendications 2 et 3, caractérisé en ce que ledit vérin est un vérin à fluide comportant un cylindre (16) fixé (17) sur le carter (1) de la turbine à gaz ; un piston (12), qui est monté coulissant à l'intérieur dudit cylindre et qui y délimite une chambre de travail (21) ; et une tige de piston (11) qui est solidaire dudit piston, et qui fait saillie à l'extérieur du cylindre et constitue ladite tige de commande (11) à laquelle est attelé ledit arbre (13), la chambre de travail (21) communiquant (J) avec l'enceinte du carter de la chambre de combustion (5), de sorte que le fluide sous pression susceptible d'être contenu dans l'enceinte du carter de la chambre de combustion a un effet de poussée dans un premier sens sur le piston et sur la tige de piston qui en est solidaire.Device according to either of Claims 2 and 3, characterized in that the said cylinder is a fluid cylinder comprising a cylinder (16) fixed (17) on the casing (1) of the gas turbine; a piston (12), which is slidably mounted inside said cylinder and which defines therein a working chamber (21); and a piston rod (11) which is integral with said piston, and which projects outside the cylinder and constitutes said control rod (11) to which said shaft (13) is coupled, the working chamber (21) communicating (J) with the enclosure of the combustion chamber housing (5), so that the pressurized fluid capable of being contained in the enclosure of the combustion chamber housing has a pushing effect in a first direction on the piston and on the piston rod which is integral therewith. Dispositif selon la revendication 4, caractérisé en en qu'une autre tige de piston (22) est solidaire du piston (12) dudit vérin à fluide et présente une extrémité (22A) qui coopère avec la face active (24) d'une came de commande (25), l'effet de ladite came de commande (25) sur ladite autre tige de piston (22) étant antagoniste de celui du fluide sous pression susceptible d'être contenu dans la chambre de travail (21) du vérin.Device according to claim 4, characterized in that another piston rod (22) is integral with the piston (12) of said fluid cylinder and has an end (22A) which cooperates with the active face (24) of a cam control (25), the effect of said control cam (25) on said other piston rod (22) being antagonistic to that of the pressurized fluid capable of being contained in the working chamber (21) of the jack. Dispositif selon la revendication 5, caractérisé en ce que ladite came de commande (25) est montée pivotante par rapport au carter (1) de la turbine à gaz autour d'un axe (26) et est attelée à un dispositif (29-30-31) de réglage de son pivotement.Device according to Claim 5, characterized in that the said control cam (25) is pivotally mounted relative to the casing (1) of the gas turbine around an axis (26) and is coupled to a device (29-30 -31) for adjusting its pivoting. Dispositif selon la revendication 6, caractérisé en ce que le dispositif de réglage du pivotement de la came est du type à pignon (30) et vis sans fin (31).Device according to Claim 6, characterized in that the device for adjusting the pivoting of the cam is of the pinion (30) and worm (31) type. Dispositif selon la revendication 7, caractérisé en ce que les vis sans fin (31) des dispositifs (29-30-31) de réglage du pivotement des cames (25) des divers groupes de deux diaphragmes (2) sont reliées les unes aux autres par une liaison flexible (33), cependant qu'un dispositif d'entraînement unique (34) est attelé à ladite liaison flexible (33) en vue de l'entraînement simultané de l'ensemble des dispositifs du réglage du pivotement des diverses cames.Device according to Claim 7, characterized in that the worms (31) of the devices (29-30-31) for adjusting the pivoting of the cams (25) of the various groups of two diaphragms (2) are connected to each other by a flexible link (33), while a single drive device (34) is coupled to said flexible link (33) for the simultaneous drive of all of the devices for adjusting the pivoting of the various cams.
EP91401167A 1990-05-03 1991-05-03 Device for the supply of combustion air to a gas turbine Expired - Lifetime EP0455559B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9005556 1990-05-03
FR909005556A FR2661714B1 (en) 1990-05-03 1990-05-03 DEVICE FOR SUPPLYING FUEL TO A GAS TURBINE.

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EP0455559A1 true EP0455559A1 (en) 1991-11-06
EP0455559B1 EP0455559B1 (en) 1993-12-08

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EP (1) EP0455559B1 (en)
DE (1) DE69100735T2 (en)
FR (1) FR2661714B1 (en)

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Also Published As

Publication number Publication date
FR2661714A1 (en) 1991-11-08
EP0455559B1 (en) 1993-12-08
US5159807A (en) 1992-11-03
DE69100735T2 (en) 1994-04-28
FR2661714B1 (en) 1994-06-17
DE69100735D1 (en) 1994-01-20

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