EP0514260A1 - Device for regulating the air supply of a gas turbine - Google Patents

Device for regulating the air supply of a gas turbine Download PDF

Info

Publication number
EP0514260A1
EP0514260A1 EP92401300A EP92401300A EP0514260A1 EP 0514260 A1 EP0514260 A1 EP 0514260A1 EP 92401300 A EP92401300 A EP 92401300A EP 92401300 A EP92401300 A EP 92401300A EP 0514260 A1 EP0514260 A1 EP 0514260A1
Authority
EP
European Patent Office
Prior art keywords
diaphragms
pivoting
groups
adjacent
crown
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
EP92401300A
Other languages
German (de)
French (fr)
Other versions
EP0514260B1 (en
Inventor
Alexandre Forestier
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 EP0514260A1 publication Critical patent/EP0514260A1/en
Application granted granted Critical
Publication of EP0514260B1 publication Critical patent/EP0514260B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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

  • each diaphragm comprises a ring, which is pivotally mounted relative to the walls of the combustion chamber, the pivoting of which constitutes a means of adjusting the cross-section of a passage for admitting oxidant into the combustion chamber, and which is coupled to a device for controlling its pivoting: b) at least certain diaphragms are grouped in groups of two adjacent diaphragms; c) the two crowns of the diaphragms of a group of two adjacent diaphragms each include a member for adjusting the pivoting of said crown; and, d) the members for adjusting the pivoting of the two rings of two adjacent diaphragms are coupled to a single control member belonging to
  • the devices for controlling the pivoting of the crowns of the diaphragms of the various groups of two diaphragms each include a fluid cylinder itself comprising at least one fluid working chamber and a piston rod, however that the working chambers of the various jacks are connected in parallel to the same enclosure capable of containing a fluid under pressure;
  • the pivot adjustment members of two adjacent crowns each comprise, for each crown, a ball joint integral with said crown with respect to the pivoting of this crown, while a single ball joint is received concomitantly in the ball joints of the adjustment members of the pivoting of said two adjacent crowns; and, g) said ball joint is coupled to said rod of the fluid jack of the device for controlling the pivoting of said two crowns.
  • the main advantage of the invention lies in the simplicity and in the efficiency of the devices produced.
  • the combustion chamber shown in the drawings is that of a gas turbine and is of the annular type. It is delimited by an internal wall 1 and by an external wall 2, which are connected by a bottom 3 and define the actual combustion chamber 4, and which are substantially annular with axis 5.
  • the combustion chamber 4 is further contained in a casing 6 delimited by an internal casing 7, and by an external casing 8, both annular with axes 5.
  • the casing 6 is moreover supplied with oxidant under pressure, generally in compressed air, via a compressor, symbolized by the arrow F in FIG. 3, and an oxidizer intake orifice 9.
  • Fuel injection devices (not shown) associated with fuel supply devices 10 are fitted on the bottom 3 of the combustion chamber.
  • the oxidizer supply devices 10 are placed adjacent one of the following on the bottom 3 so that a ball joint 21 can be received simultaneously in the two housings 19 belonging to the ferrules 15 of two adjacent devices 10 and a ball joint 7 or an axis 22 can be received simultaneously in the housings 20 of two other adjacent devices 10.
  • Cylinders 23 are provided and each comprise: a cylinder body 24, one end of which extends transversely to form one of the bottoms of said cylinder, the other end extending into a flange 26 for fixing said cylinder on the outer casing 8 of the casing; a piston 27, slidably mounted inside the cylinder 24 and defining therein, in cooperation with the bottom 25, a working chamber 28; a piston rod 29, which is fixed to the piston 27 by means of a nut 30 and which passes through the other bottom 31 of the cylinder provided for this purpose with a hole 32 receiving with play J said piston rod 29; a deformable bellows 38, interposed between the piston 27 and the bottom 31 and delimiting a return chamber 33, which is in permanent communication with the casing 6 via the clearance J.
  • the bottom 31 has a neck 34 which penetrates into a hole 35.
  • Cylinders 23 are provided and each comprise: a cylinder body 24, one end of which extends transversely to form one of the bottoms of said cylinder, the other end extending into a flange 26 for fixing said cylinder cylinder on the outer casing 8 of the casing; a piston 27, slidably mounted inside the cylinder 24 and defining therein, in cooperation with the bottom 25, a working chamber 28; a piston rod 29, which is fixed to the piston 27 by means of a nut 30 and which passes through the other bottom 31 of the cylinder provided for this purpose with a hole 32 receiving with play J said piston rod 29; a deformable bellows 38, interposed between the piston 27 and the bottom 31 and delimiting a return chamber 33, which is in permanent communication with the casing 6 via the clearance J.
  • the bottom 31 has a neck 34 which penetrates into a hole 35 passing through the outer casing 8 of the casing.
  • the flange 26 is provided with a shoulder 36 on which the bottom 31 is supported and which cooperates with the middle in position of said bottom 31, after said flange 26 has been fixed on the outer casing 26 of the casing by means of screws 37
  • the bottom 25 is traversed by a hole 39 to which is adapted a connector 40 for connecting the working chamber 28 to a general duct 41 capable of containing a fluid under pressure. All the connections 40 are connected, in parallel, to the same conduit 41.
  • the duct 41 is also connected to a two-position fluid distributor 48, to which are also connected a source of pressurized fluid, such as an air compressor, symbolized by the arrow G, and, a pressureless reservoir, fluid return, such as the atmosphere, symbolized by the arrow H.
  • a source of pressurized fluid such as an air compressor, symbolized by the arrow G
  • a pressureless reservoir, fluid return such as the atmosphere, symbolized by the arrow H.
  • Each cylinder 23 controls the pivoting of two ferrules 15, by means of the pivoting assembly of two coaxial shafts 42, 43, integral with a ball joint 21, in the pins 44, 45 of which are provided the branches 46, 47 with a fork constituting the end of the piston rod 29 of said cylinder 23, respectively.
  • the fluid distributor 42 being placed in its first position, the ferrules 15 of the various oxidizer supply devices 10 are placed in respective positions in which the solid areas 17 of these ferrules close the orifices 13 of the corresponding channels 12. Act on the ferrules 15, only the return forces due to the pressure of the fluid (oxidizer) contained in the casing 6 and, by means of the clearances J, conveyed to the interior of the return chambers 33.
  • the fluid distributor 48 When from its first position, the fluid distributor 48 is placed in its second position, the pressurized fluid coming from the source of pressurized fluid G is conveyed, through the conduit 41 and the fittings 40 to the inside the working chambers 28 of the various jacks 23. Then act on the ferrules, not only the forces due to the pressure of the fluid contained in the return chambers 33, but also those due to the pressure of the fluid contained in the working chambers 28. The results of these forces cause the ferrules 15 to pivot, the solid areas 17 of which uncover the orifices 13 and put them in communication with the lights 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Fluid-Driven Valves (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

The invention relates to a device for feeding oxidant to a combustion chamber (4) of a gas turbine comprising diaphragms (13-15) for regulating the flow of oxidant admitted, each diaphragm comprising a pivoting ring (15); the diaphragms are grouped in pairs; the rings (15) of two adjacent diaphragms each comprise a member (19) for regulating their pivoting; said members (19) for regulating the pivoting are connected (21) to a single control member (29). …<??>According to the invention, the device for controlling the pivoting of the diaphragm comprises jacks (23) each comprising a working chamber (28) and a jack rod (29), the chambers of the different jacks being connected in parallel (40) to one and the same enclosure under pressure (41); the members for regulating the pivoting of two adjacent rings comprise, for each ring, a ball-joint housing (19) which is integral with said ring, a single ball-joint (21) being received in the housings of the two rings; and the ball-joint (21) is connected to said jack rod (29). …<IMAGE>…

Description

Certaines turbines à gaz sont déjà équipées de dispositifs d'alimentation en comburant des chambres de combustion, chaque dispositif d'alimentation en comburant comprenant notamment une pluralité de diaphragmes de réglage de la quantité de comburant admis dans ladite chambre de combustion. Selon une réalisation d'une turbine connue, les caractéristiques suivantes sont adoptées : a) chaque diaphragme comporte une couronne, qui est montée pivotante par rapport aux parois de la chambre de combustion, dont le pivotement constitue un moyen de réglage de la section d'un passage d'admission de comburant dans la chambre de combustion, et qui est attelée à un dispositif de commande de son pivotement : b) certains diaphragmes au moins sont regroupés par groupes de deux diaphragmes adjacents ; c) les deux couronnes des diaphragmes d'un groupe de deux diaphragmes adjacents, comportent, chacune, un organe de réglage du pivotement de ladite couronne ; et, d) les organes de réglage du pivotement des deux couronnes de deux diaphragmes adjacents sont attelés à un organe de commande unique appartenant audit dispositif de commande du pivotement.Certain gas turbines are already equipped with devices for supplying oxidant to combustion chambers, each device for supplying oxidant comprising in particular a plurality of diaphragms for adjusting the quantity of oxidant admitted into said combustion chamber. According to an embodiment of a known turbine, the following characteristics are adopted: a) each diaphragm comprises a ring, which is pivotally mounted relative to the walls of the combustion chamber, the pivoting of which constitutes a means of adjusting the cross-section of a passage for admitting oxidant into the combustion chamber, and which is coupled to a device for controlling its pivoting: b) at least certain diaphragms are grouped in groups of two adjacent diaphragms; c) the two crowns of the diaphragms of a group of two adjacent diaphragms each include a member for adjusting the pivoting of said crown; and, d) the members for adjusting the pivoting of the two rings of two adjacent diaphragms are coupled to a single control member belonging to said device for controlling the pivoting.

Ces dispositifs connus utilisent des vérins de réglage dont les tiges de piston traversent les deux fonds de chaque cylindre, l'une des extrémités de chaque tige de piston coopérant avec une came elle-même montée pivotante et attelée à un pignon de réglage de sa position angulaire. L'ensemble est complexe, comporte de nombreux composants, notamment de précision et la présente invention, qui vise la réalisation des fonctions déjà réalisées par les dispositifs connus, a pour but de simplifier considérablement la fabrication de tels dispositifs et par conséquent d'augmenter leur fiabilité et celle des turbines à gaz qui en sont munies.These known devices use adjustment cylinders whose piston rods pass through the two bottoms of each cylinder, one end of each piston rod cooperating with a cam itself pivotally mounted and coupled to a pinion for adjusting its position. angular. The assembly is complex, comprises many components, in particular of precision and the present invention, which aims at the realization of the functions already carried out by the known devices, aims to considerably simplify the manufacture of such devices and consequently to increase their reliability and that of the gas turbines fitted with it.

Selon l'invention : e) les dispositifs de commande du pivotement des couronnes des diaphragmes des divers groupes de deux diaphragmes comportent, chacun, un vérin à fluide comprenant lui-même au moins une chambre de travail du fluide et une tige de piston,cependant que les chambres de travail des divers vérins sont racordées en parallèle à une même enceinte susceptible de contenir un fluide sous pression ; f) les organes de réglage du pivotement de deux couronnes adjacentes comprennent, chacun, pour chaque couronne, un logement de rotule solidaire de ladite couronne vis-à-vis du pivotement de cette couronne, cependant qu'une rotule unique est reçue concomittament dans les logements de rotules des organes de réglage du pivotement des deuxdites couronnes adjacentes ; et, g) ladite rotule est attelée à ladite tige du vérin à fluide du dispositif de commande du pivotement des deuxdites couronnes.According to the invention: e) the devices for controlling the pivoting of the crowns of the diaphragms of the various groups of two diaphragms each include a fluid cylinder itself comprising at least one fluid working chamber and a piston rod, however that the working chambers of the various jacks are connected in parallel to the same enclosure capable of containing a fluid under pressure; f) the pivot adjustment members of two adjacent crowns each comprise, for each crown, a ball joint integral with said crown with respect to the pivoting of this crown, while a single ball joint is received concomitantly in the ball joints of the adjustment members of the pivoting of said two adjacent crowns; and, g) said ball joint is coupled to said rod of the fluid jack of the device for controlling the pivoting of said two crowns.

Les avantageuses dispositions suivantes sont en outre de préférence adoptées :

  • ladite rotule est solidaire d'un arbre de pivotement monté à pivotement à l'extrémié de la tige du vérin ;
  • le logement de rotule solidaire de chaque couronne est réalisé directement sur ladite couronne à sa périphérie ;
  • dans ce dispositif : h) les groupes de deux diaphragmes se succèdent de manière qu'un diaphragme d'un groupe soit adjacent à un diaphragme du groupe suivant ; et i) un dispositif complémentaire de synchronisation des pivotements des couronnes des diaphragmes des deuxdits groupes successifs de diaphragmes est attelé auxdits deux diaphragmes adjacents appartenant, l'un, à l'un des deuxdits groupes, l'autre, à l'autre des deuxdits groupes;
  • le dispositif complémentaire de synchronisation comprend deux logements complémentaires solidaires, l'un de la couronne du diaphragme appartenant à l'un des deuxdits groupes de diaphragmes, l'autre de la couronne du diaphragme appartenant à l'autre des deuxdits groupes de diaphragmes, cependant que ces deux logements complémentaires reçoivent concomittament un doigt commun de synchronisation.
The following advantageous arrangements are also preferably adopted:
  • said ball joint is integral with a pivot shaft pivotally mounted at the end of the cylinder rod;
  • the ball joint housing integral with each ring is produced directly on said ring at its periphery;
  • in this device: h) the groups of two diaphragms follow one another so that a diaphragm of one group is adjacent to a diaphragm of the next group; and i) a complementary device for synchronizing the pivoting of the crowns of the diaphragms of the two successive groups of diaphragms is coupled to said two adjacent diaphragms belonging, one to one of said two groups, the other to the other of said two groups;
  • the complementary synchronization device comprises two complementary housings integral, one of the crown of the diaphragm belonging to one of said two groups of diaphragms, the other of the crown of diaphragm belonging to the other of said two groups of diaphragms, however that these two complementary housings simultaneously receive a common synchronization finger.

L'avantage principal de l'invention réside dans la simplicité et dans l'efficacité des dispositifs réalisés.The main advantage of the invention lies in the simplicity and in the efficiency of the devices produced.

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 de dispositifs d'alimentation en comburant conformes à l'invention ;
  • la figure 2 est une coupe transversale de ladite turbine à gaz montrant des détails de réalisation d'un dispositif d'alimentation en comburant conforme à l'invention ;
  • la figure 3 est une coupe suivant III-III de la figure 2 ;
  • la figure 4 est une vue agrandie de détail de l'ensemble A de la figure 3 ; et,
  • la figure 5 est une coupe partielle suivant V-V de la figure 4.
Reference will be made to the accompanying drawings, in which:
  • Figure 1 is a partial cross section of a gas turbine provided with oxidant supply devices according to the invention;
  • Figure 2 is a cross section of said gas turbine showing details of an oxidizer supply device according to the invention;
  • Figure 3 is a section along III-III of Figure 2;
  • Figure 4 is an enlarged detail view of the assembly A of Figure 3; and,
  • FIG. 5 is a partial section along VV of FIG. 4.

La chambre de combustion représentée sur les dessins est celle d'une turbine à gaz et est du type annulaire. Elle est délimitée par une paroi interne 1 et par une paroi externe 2, qui sont reliées par un fond 3 et définissent l'enceinte de combustion proprement dite 4, et qui sont sensiblement annulaires d'axe 5. L'enceinte de combustion 4 est en outre contenue dans un carter 6 délimité par une enveloppe interne 7, et par une enveloppe externe 8, toutes deux annulaires d'axes 5. Le carter 6 est par ailleurs alimenté en comburant sous pression, généralement en air comprimé, par l'intermédiaire d'un compresseur, symbolisé par la flèche F de la figure 3, et d'un orifice d'admission de comburant 9.The combustion chamber shown in the drawings is that of a gas turbine and is of the annular type. It is delimited by an internal wall 1 and by an external wall 2, which are connected by a bottom 3 and define the actual combustion chamber 4, and which are substantially annular with axis 5. The combustion chamber 4 is further contained in a casing 6 delimited by an internal casing 7, and by an external casing 8, both annular with axes 5. The casing 6 is moreover supplied with oxidant under pressure, generally in compressed air, via a compressor, symbolized by the arrow F in FIG. 3, and an oxidizer intake orifice 9.

Sont adaptés sur le fond 3 de l'enceinte de combustion des dispositifs d'injection de carburant (non représentés) associés à des dispositifs d'alimentation en comburant 10.Fuel injection devices (not shown) associated with fuel supply devices 10 are fitted on the bottom 3 of the combustion chamber.

Un dispositif d'alimentation en comburant 10 conforme à l'invention comprend notamment :

  • un ensemble d'aubes radiales 11, formant des canaux 12 qui sont susceptibles de relier l'enceinte de combustion 4 au carter 6, et qui débouchent dans une périphérie externe 14 dudit ensemble par des orifices 13 ;
  • une virole 15, ajustée à ladite périphérie externe 14 de manière à pouvoir pivoter autour d'un axe géométrique 16 et munie de plages pleines 17 aptes à obturer les orifices 13 des canaux 12 et de lumières 18 séparant lesdites plages 17 et aptes au contraire à coïncider avec lesdits orifices 13, ceux-ci étant obturés ou découverts selon la position relative de la virole 15 par rapport à l'ensemble d'aubes 11 ;
  • un premier logement de rotule 19 et un deuxième logement de rotule 20, solidaires de chaque virole 15, aptes à recevoir chacun la moitié d'un arbre cylindrique ou d'une rotule sphérique, et disposés en des emplacements approximativement diamétralement cylindriques ou d'une rotule sphérique, et disposés en des emplacements approximativement diamétralement opposés par rapport à l'axe géométrique 16.
An oxidizer supply device 10 according to the invention notably comprises:
  • a set of radial vanes 11, forming channels 12 which are capable of connecting the combustion chamber 4 to the casing 6, and which open into an external periphery 14 of said set through orifices 13;
  • a ferrule 15, adjusted to said external periphery 14 so as to be able to pivot around a geometric axis 16 and provided with solid pads 17 capable of closing the orifices 13 of the channels 12 and of lights 18 separating said areas 17 and capable, on the contrary, of coinciding with said orifices 13, these being closed or uncovered according to the relative position of the ferrule 15 relative to the set of blades 11;
  • a first ball joint housing 19 and a second ball joint housing 20, integral with each ferrule 15, each capable of receiving half of a cylindrical shaft or of a spherical ball joint, and arranged in approximately diametrically cylindrical locations or of a spherical ball joint, and arranged in locations approximately diametrically opposite with respect to the geometric axis 16.

Les dispositifs 10 d'alimentation en comburant sont placés adjacents l'un du suivant sur le fond 3 de manière qu'une rotule 21 puisse être reçue concomittament dans les deux logements 19 appartenant aux viroles 15 de deux dispositifs 10 adjacents et qu'une rotule 7 ou un axe 22 puisse être reçu concomittament dans les logements 20 de deux autres dispositifs 10 adjacents.The oxidizer supply devices 10 are placed adjacent one of the following on the bottom 3 so that a ball joint 21 can be received simultaneously in the two housings 19 belonging to the ferrules 15 of two adjacent devices 10 and a ball joint 7 or an axis 22 can be received simultaneously in the housings 20 of two other adjacent devices 10.

Des vérins 23 sont prévus et comportent, chacun : un corps de cylindre 24, dont l'une des extrémités se prolonge transversalement pour constituer l'un 25 des fonds dudit cylindre, l'autre extrémité se prolongeant en une bride 26 de fixation dudit cylindre sur l'enveloppe extérieure 8 du carter ; un piston 27, monté coulissant à l'intérieur du cylindre 24 et y délimitant, en coopération avec le fond 25, une chambre de travail 28 ; une tige de piston 29, qui est fixée sur le piston 27 au moyen d'un écrou 30 et qui traverse l'autre fond 31 du cylindre muni à cet effet d'un trou 32 recevant avec un jeu J ladite tige de piston 29 ; un soufflet déformable 38, interposé entre le piston 27 et le fond 31 et délimitant une chambre de rappel 33, qui est en communication permanente avec le carter 6 par l'intermédiaire du jeu J. Le fond 31 comporte un col 34 qui pénètre dans un trou 35.Cylinders 23 are provided and each comprise: a cylinder body 24, one end of which extends transversely to form one of the bottoms of said cylinder, the other end extending into a flange 26 for fixing said cylinder on the outer casing 8 of the casing; a piston 27, slidably mounted inside the cylinder 24 and defining therein, in cooperation with the bottom 25, a working chamber 28; a piston rod 29, which is fixed to the piston 27 by means of a nut 30 and which passes through the other bottom 31 of the cylinder provided for this purpose with a hole 32 receiving with play J said piston rod 29; a deformable bellows 38, interposed between the piston 27 and the bottom 31 and delimiting a return chamber 33, which is in permanent communication with the casing 6 via the clearance J. The bottom 31 has a neck 34 which penetrates into a hole 35.

Des vérins 23 sont prévus et comportent, chacun : un corps de cylindre 24, dont l'une des extrémités se prolonge transversalement pour constituer l'un 25 des fonds dudit cylindre, l'autre extrémité se prolongeant en une bride 26 de fixation dudit cylindre sur l'enveloppe externe 8 du carter ; un piston 27, monté coulissant à l'intérieur du cylindre 24 et y délimitant, en coopération avec le fond 25, une chambre de travail 28 ; une tige de piston 29, qui est fixée sur le piston 27 au moyen d'un écrou 30 et qui traverse l'autre fond 31 du cylindre muni à cet effet d'un trou 32 recevant avec un jeu J ladite tige de piston 29 ; un soufflet déformable 38, interposé entre le piston 27 et le fond 31 et délimitant une chambre de rappel 33, qui est en communication permanente avec le carter 6 par l'intermédiaire du jeu J. Le fond 31 comporte un col 34 qui pénètre dans un trou 35 traversant l'enveloppe externe 8 du carter. La bride 26 est munie d'un épaulement 36 sur lequel le fond 31 est en appui et qui coopère au miantien en position dudit fond 31, après que ladite bride 26 ait été fixée sur l'enveloppe externe 26 du carter au moyen de vis 37. Le fond 25 est traversé par un trou 39 auquel est adapté un raccord 40 de branchement de la chambre de travail 28 à un conduit général 41 susceptible de contenir un fluide sous pression. Tous les racords 40 sont reliés, en parallèle, au même conduit 41.Cylinders 23 are provided and each comprise: a cylinder body 24, one end of which extends transversely to form one of the bottoms of said cylinder, the other end extending into a flange 26 for fixing said cylinder cylinder on the outer casing 8 of the casing; a piston 27, slidably mounted inside the cylinder 24 and defining therein, in cooperation with the bottom 25, a working chamber 28; a piston rod 29, which is fixed to the piston 27 by means of a nut 30 and which passes through the other bottom 31 of the cylinder provided for this purpose with a hole 32 receiving with play J said piston rod 29; a deformable bellows 38, interposed between the piston 27 and the bottom 31 and delimiting a return chamber 33, which is in permanent communication with the casing 6 via the clearance J. The bottom 31 has a neck 34 which penetrates into a hole 35 passing through the outer casing 8 of the casing. The flange 26 is provided with a shoulder 36 on which the bottom 31 is supported and which cooperates with the middle in position of said bottom 31, after said flange 26 has been fixed on the outer casing 26 of the casing by means of screws 37 The bottom 25 is traversed by a hole 39 to which is adapted a connector 40 for connecting the working chamber 28 to a general duct 41 capable of containing a fluid under pressure. All the connections 40 are connected, in parallel, to the same conduit 41.

Le conduit 41 est en outre raccordé à un distributeur de fluide à deux positions 48, auquel sont également raccordés une source de fluide sous pression, telle qu'un compresseur d'air, symbolisée par la flèche G, et, un réservoir sans pression, de retour de fluide, tel que l'atmosphère, symbolisé par la flèche H.The duct 41 is also connected to a two-position fluid distributor 48, to which are also connected a source of pressurized fluid, such as an air compressor, symbolized by the arrow G, and, a pressureless reservoir, fluid return, such as the atmosphere, symbolized by the arrow H.

Les deux positions du distributeur de fluide 48 correspondent :

  • la première position, représentée sur la figure 1, à la mise en communication du conduit 41 avec le réservoir sans pression H (ainsi qu'à la communication de la source de fluide G avec le réservoir H) ; et,
  • la deuxième position, à la mise en communication du conduit 41 avec la source de fluide sous pression G, et, à l'isolement du réservoir H vis-à-vis de la source de fluide sous pression G et du conduit 41.
The two positions of the fluid distributor 48 correspond:
  • the first position, shown in FIG. 1, when the duct 41 is placed in communication with the pressureless tank H (as well as when the fluid source G communicates with the tank H); and,
  • the second position, when the duct 41 is placed in communication with the source of pressurized fluid G, and, when the reservoir H is isolated from the source of pressurized fluid G and of the duct 41.

Chaque vérin 23 commande le pivotement de deux viroles 15, au moyen du montage pivotant de deux arbres 42, 43 coaxiaux, solidaires d'une rotule 21, dans les tourillons 44, 45 dont sont munies les branches 46, 47 d'une fourche constituant l'extrémité de la tige de piston 29 dudit vérin 23, respectivement.Each cylinder 23 controls the pivoting of two ferrules 15, by means of the pivoting assembly of two coaxial shafts 42, 43, integral with a ball joint 21, in the pins 44, 45 of which are provided the branches 46, 47 with a fork constituting the end of the piston rod 29 of said cylinder 23, respectively.

Le fonctionnement des dispositifs d'alimentation en comburant qui viennent d'être décrits va maintenant être exposé.The operation of the oxidant supply devices which have just been described will now be described.

Le distributeur de fluide 42 étant placé dans sa première position, les viroles 15 des divers dispositifs d'alimentation en comburant 10 sont placées en des positions respectives dans lesquelles les plages pleines 17 de ces viroles obturent les orifices 13 des canaux correspondants 12. Agissent sur les viroles 15, uniquement les forces de rappel dues à la pression du fluide (comburant) contenu dans le carter 6 et, par l'intermédiaire des jeux J, véhiculé jusqu'à l'intérieur des chambres de rappel 33.The fluid distributor 42 being placed in its first position, the ferrules 15 of the various oxidizer supply devices 10 are placed in respective positions in which the solid areas 17 of these ferrules close the orifices 13 of the corresponding channels 12. Act on the ferrules 15, only the return forces due to the pressure of the fluid (oxidizer) contained in the casing 6 and, by means of the clearances J, conveyed to the interior of the return chambers 33.

Lorsqu'à partir de sa première position, le distributeur de fluide 48 est placé dans sa deuxième position, le fluide sous pression provenant de la source de fluide sous pression G est véhiculé, par le conduit 41 et les raccords 40 jusqu'à l'intérieur des chambres de travail 28 des divers vérins 23. Agissent alors sur les viroles, non seulement les forces dues à la pression du fluide contenu dans les chambres de rappel 33, mais aussi celles dues à la pression du fluide contenu dans les chambres de travail 28. Les résultats de ces forces provoquent le pivotement des viroles 15 dont les plages pleines 17 découvrent les orifices 13 et les mettent en communication avec les lumières 18.When from its first position, the fluid distributor 48 is placed in its second position, the pressurized fluid coming from the source of pressurized fluid G is conveyed, through the conduit 41 and the fittings 40 to the inside the working chambers 28 of the various jacks 23. Then act on the ferrules, not only the forces due to the pressure of the fluid contained in the return chambers 33, but also those due to the pressure of the fluid contained in the working chambers 28. The results of these forces cause the ferrules 15 to pivot, the solid areas 17 of which uncover the orifices 13 and put them in communication with the lights 18.

Il convient d'observer les divers mécanismes permettant l'obtention de pivotements synchronisés des diverses viroles 15 :

  • tout d'abord les viroles 15 d'un groupe de deux viroles commandées par une même rotule 21 pivotent symétriquement, l'une dans un sens, l'autre dans l'autre sens de pivotement, lorsque ladite rotule est déplacée et pousse ou tire simultanément sur les logements de rotules 19 de ces deux viroles ;
  • l'alimentation en parallèle par le conduit 41 des raccords 40 provoque, en principe et généralement, des déplacements sensiblement égaux des pistons 27 et par suite des rotules 21, et donc des pivotements égaux des viroles 15 des divers groupes de deux viroles ;
  • pour éviter toutes différences non désirées des déplacements de certaines viroles par rapport à d'autres, les axes ou rotules 22 ont été prévus et réalisent la synchronisation correcte des pivotements des viroles 15 de deux groupes adjacents de deux viroles, et par voie de conséquence, de l'ensemble des viroles, compte tenu que les pivotements de deux viroles adjacentes sont synchronisés soit par une rotule 21, soit par un axe ou une rotule 22.
It should be observed the various mechanisms allowing synchronized pivoting of the various ferrules 15 to be obtained:
  • first of all the ferrules 15 of a group of two ferrules controlled by the same ball joint 21 rotate symmetrically, one in one direction, the other in the other direction of pivoting, when said ball joint is moved and pushes or pulls simultaneously on the ball joint housings 19 of these two ferrules;
  • the parallel supply via the conduit 41 of the fittings 40 causes, in principle and generally, substantially equal displacements of the pistons 27 and consequently of the ball joints 21, and therefore equal pivoting of the ferrules 15 of the various groups of two ferrules;
  • to avoid any unwanted differences in the movements of certain ferrules relative to others, the axes or ball joints 22 have been provided and achieve the correct synchronization of the pivotings of the ferrules 15 of two adjacent groups of two ferrules, and consequently, of all the ferrules, taking into account that the pivotings of two adjacent ferrules are synchronized either by a ball joint 21, or by an axis or a ball joint 22.

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 (5)

Dispositif d'alimentation en comburant d'une chambre de combustion (4) d'une turbine à gaz, dispositif d'alimentation en comburant comprenant notamment une pluralité de diaphragmes (13-15) de réglage de la quantité de comburant admis dans ladite chambre de combustion, cependant que : a) chaque diaphragme comporte une couronne (15), qui est montée pivotante par rapport aux parois (14) de la chambre de combustion (4), dont le pivotement constitue un moyen de réglage de la section d'un passage (12) d'admission de comburant dans la chambre de combustion, et qui est attelée (19-21) à un dispositif (29-23) de commande de son pivotement ; b) certains diaphragmes au moins sont regroupés par groupes de deux diaphragmes adjacents ; c) les deux couronnes (15) des diaphragmes d'un groupe de deux diaphragmes adjacents comportent, chacune, un organe (19) de réglage du pivotement de ladite couronne ; et, d) les organes (19) de réglage du pivotement des deux couronnes de deux diaphragmes adjacents sont attelés (21) à un organe de commande unique (29) appartenant audit dispositif de commande du pivotement ;
caractérisé en ce que : e) les dispositifs de commande du pivotement des couronnes des diaphragmes des divers groupes de deux diaphragmes comportent, chacun, un vérin à fluide (23) comprenant lui-même au moins une chambre de travail du fluide et une tige de piston (29), cependant que les chambres de travail (28) des divers vérins sont raccordées (40) en parallèle à une même enceinte (41) susceptible de contenir un fluide sous pression ; f) les organes de réglage du pivotement de deux couronnes adjacentes comprennent, chacun, pour chaque couronne, un logement de rotule (19) solidaire de ladite couronne (15) vis-à-vis du pivotement de cette couronne, cependant qu'une rotule unique (21) est reçue concomittament dans les logements de rotules (19) des organes de réglage du pivotement des deuxdites couronnes adjacentes ; et, g) ladite rotule (21) est attelée à ladite tige (29) du vérin à fluide du dispositif (29-33) de commande du pivotement des deuxdites couronnes. Device for supplying oxidant to a combustion chamber (4) of a gas turbine, device for supplying oxidant comprising in particular a plurality of diaphragms (13-15) for adjusting the quantity of oxidant admitted into said chamber combustion, however: a) each diaphragm has a crown (15), which is pivotally mounted relative to the walls (14) of the combustion chamber (4), the pivoting of which constitutes a means of adjusting the cross-section of a passage (12) d 'admission of oxidizer into the combustion chamber, and which is coupled (19-21) to a device (29-23) for controlling its pivoting; b) at least some diaphragms are grouped in groups of two adjacent diaphragms; c) the two crowns (15) of the diaphragms of a group of two adjacent diaphragms each have a member (19) for adjusting the pivoting of said crown; and, d) the members (19) for adjusting the pivoting of the two rings of two adjacent diaphragms are coupled (21) to a single control member (29) belonging to said pivoting control device;
characterized in that: e) the devices for controlling the pivoting of the crowns of the diaphragms of the various groups of two diaphragms each comprise a fluid cylinder (23) itself comprising at least one fluid working chamber and a piston rod (29), however, that the working chambers (28) of the various jacks are connected (40) in parallel to the same enclosure (41) capable of containing a fluid under pressure; f) the members for adjusting the pivoting of two adjacent crowns each comprise, for each crown, a ball joint housing (19) integral with said crown (15) with respect to the pivoting of this crown, while a ball joint single (21) is received simultaneously in the ball joint housings (19) of the members for adjusting the pivoting of the two adjacent crowns; and, g) said ball joint (21) is coupled to said rod (29) of the fluid cylinder of the device (29-33) for controlling the pivoting of said two crowns. Dispositif d'alimentation en comburant selon la revendication 1, caractérisé en ce que ladite rotule (19) est solidaire d'un arbre de pivotement (42-43), monté à pivotement (44-45) à l'extrémité (46-47) de la tige (29) du vérin.Oxidizer supply device according to claim 1, characterized in that said ball joint (19) is integral with a pivot shaft (42-43), pivotally mounted (44-45) at the end (46-47 ) of the rod (29) of the jack. Dispositif d'alimentation en comburant selon l'une quelconque des revendications 1 et 2, caractérisé en ce que le logement de rotule (19) solidaire de chaque couronne (15) est réalisé directement sur ladite couronne à sa périphérie.Oxidizer supply device according to any one of claims 1 and 2, characterized in that the ball joint housing (19) integral with each ring (15) is produced directly on said ring at its periphery. Dispositif d'alimentaiton en comburant selon l'une quelconque des revendications 1 à 3, caractérisé en ce que : h) les groupes de deux diaphragmes se succèdent de manière qu'un diaphragme d'un groupe soit adjacent à un diaphragme du groupe suivant ; et i) un dispositif complémentaire (20-22) de synchronisation des pivotements des couronnes (15) des diaphragmes des deuxdits groupes successifs de diaphragme est attelé auxdits deux diaphragmes adjacents appartenant, l'un, à l'un des deuxdits groupes, l'autre, à l'autre des deuxdits groupes. Oxidant feed device according to any one of Claims 1 to 3, characterized in that: h) the groups of two diaphragms follow one another so that a diaphragm of one group is adjacent to a diaphragm of the next group; and i) a complementary device (20-22) for synchronizing the pivoting of the crowns (15) of the diaphragms of the two said successive diaphragm groups is coupled to the said two adjacent diaphragms belonging, one to one of the two said groups, the other , to the other of the two said groups. Dispositif d'alimentation en comburant selon la revendication 4, caractérisé en ce que le dispositif complémentaire de synchronisation comprend deux logements complémentaires (20) solidaires, l'un de la couronne (15) du diaphragme appartenant à l'un des deuxdits groupes de diaphragmes, l'autre de la couronne (15) du diaphragme appartenant à l'autre des deuxdits groupes de diaphragmes, cependant que ces deux logements complémentaires (20) reçoivent concomittament un doigt commun de synchronisation (22).Oxidizer supply device according to claim 4, characterized in that the complementary synchronization device comprises two complementary housings (20) integral with one of the crown (15) of the diaphragm belonging to one of said two groups of diaphragms , the other of the crown (15) of the diaphragm belonging to the other of the two said groups of diaphragms, while these two complementary housings (20) concomitantly receive a common synchronizing finger (22).
EP92401300A 1991-05-16 1992-05-13 Device for regulating the air supply of a gas turbine Expired - Lifetime EP0514260B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9105962 1991-05-16
FR9105962A FR2676529B1 (en) 1991-05-16 1991-05-16 COMBUSTION SUPPLY DEVICE FOR A GAS TURBINE COMPRISING FLOW ADJUSTMENT DIAPHRAGMS.

Publications (2)

Publication Number Publication Date
EP0514260A1 true EP0514260A1 (en) 1992-11-19
EP0514260B1 EP0514260B1 (en) 1994-11-23

Family

ID=9412849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92401300A Expired - Lifetime EP0514260B1 (en) 1991-05-16 1992-05-13 Device for regulating the air supply of a gas turbine

Country Status (5)

Country Link
US (1) US5230212A (en)
EP (1) EP0514260B1 (en)
JP (1) JP2801111B2 (en)
DE (1) DE69200696T2 (en)
FR (1) FR2676529B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7771494A (en) * 1993-12-03 1995-06-08 Westinghouse Electric Corporation System for controlling combustion in a gas combustion-type turbine
US5673552A (en) * 1996-03-29 1997-10-07 Solar Turbines Incorporated Fuel injection nozzle
FR2748553B1 (en) * 1996-05-09 1998-06-19 Snecma INJECTION SYSTEM WITH VARIABLE GEOMETRY ADOPTING AIR FLOW ACCORDING TO ENGINE RPM
FR2754590B1 (en) * 1996-10-16 1998-11-20 Snecma DEVICE FOR SUPPLYING OXIDIZER TO A GAS TURBINE COMPRISING FLOW ADJUSTMENT DIAPHRAGM CONTROLLED IN PAIRS
US9194258B2 (en) * 2012-02-27 2015-11-24 Pratt & Whitney Canada Corp. Gas turbine engine case bosses
US9441544B2 (en) * 2013-02-06 2016-09-13 General Electric Company Variable volume combustor with nested fuel manifold system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945921A1 (en) * 1969-09-11 1971-03-25 Motoren Turbinen Union Combustion chamber
US3902316A (en) * 1974-10-15 1975-09-02 Gen Motors Corp Deceleration detector
EP0455559A1 (en) * 1990-05-03 1991-11-06 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Device for the supply of combustion air to a gas turbine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902315A (en) * 1974-06-12 1975-09-02 United Aircraft Corp Starting fuel control system for gas turbine engines
GB2085146B (en) * 1980-10-01 1985-06-12 Gen Electric Flow modifying device
JPS61195214A (en) * 1985-02-22 1986-08-29 Hitachi Ltd Air flow part adjusting device for gas turbine combustor
FR2585770B1 (en) * 1985-08-02 1989-07-13 Snecma ENLARGED BOWL INJECTION DEVICE FOR A TURBOMACHINE COMBUSTION CHAMBER
FR2596102B1 (en) * 1986-03-20 1988-05-27 Snecma INJECTION DEVICE WITH AXIAL CENTRIPE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945921A1 (en) * 1969-09-11 1971-03-25 Motoren Turbinen Union Combustion chamber
US3902316A (en) * 1974-10-15 1975-09-02 Gen Motors Corp Deceleration detector
EP0455559A1 (en) * 1990-05-03 1991-11-06 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Device for the supply of combustion air to a gas turbine

Also Published As

Publication number Publication date
EP0514260B1 (en) 1994-11-23
DE69200696T2 (en) 1995-04-13
JP2801111B2 (en) 1998-09-21
DE69200696D1 (en) 1995-01-05
FR2676529A1 (en) 1992-11-20
JPH05149545A (en) 1993-06-15
US5230212A (en) 1993-07-27
FR2676529B1 (en) 1994-11-25

Similar Documents

Publication Publication Date Title
CA2610056C (en) Turboprop engine equipped with an adjustable blade direction assembly
CA2787361C (en) Device for controlling the movement of a ring gate of a hydraulic machine and hydraulic machine comprising such a device
WO2021165616A1 (en) Turbomachine module equipped with a stator blade pitch-changing system
EP0455559B1 (en) Device for the supply of combustion air to a gas turbine
EP3864298A1 (en) Turbine engine comprising a rotor supporting variable-pitch blades
EP0514260B1 (en) Device for regulating the air supply of a gas turbine
WO2018037183A1 (en) Pitch-changing system equipped with means for lubricating a load-transfer bearing
FR2581129A1 (en) FUEL SUPPLY CONTROL SYSTEM
EP0921309A1 (en) Hydraulic motor with switch valve
EP0378943B1 (en) Compressor housing with an adaptable inner diameter for a turbo machine
EP1331404A1 (en) Actuation assembly with synchronized hydraulic actuators
FR2691508A1 (en) Pressurized fluid cylinder and variable section nozzle when applied.
FR2711433A1 (en) Coaxial flow rate regulator
FR2718190A1 (en) Fuel injection control valve for a turbomachine.
FR2961566A1 (en) Jack actuator for mobile body in turboshaft engine e.g. turbojet of airplane, has fixed body comprising connection unit that is connected to pressurized fluid source emerging in single body on both sides of pistons
BE1011007A3 (en) VALVE ONLINE self-locking.
FR2836960A1 (en) HYDRAULIC MOTOR WITH STAGE RADIAL CYLINDERS
EP4069960A1 (en) Telescopic connecting rod for a variable compression ratio engine
FR3137131A1 (en) TURBOMACHINE MODULE EQUIPPED WITH A FLUIDIC CONNECTION
WO2022096837A1 (en) Jet engine rear part comprising a nozzle having flaps comprising levers that are movable by means of upstream and downstream bearing walls
FR2760786A1 (en) Circular IC engine with oscillating motion
FR2593858A1 (en) CENTRIFUGAL COMPRESSOR
FR2909139A1 (en) Path controlling device for compression rate control arm of e.g. spark ignition internal combustion engine, has valves to control rod position such that rod takes stable position among four positions irrespective of force applied on rod
FR3070719A1 (en) CAM SHAFT FOR COMBUSTION ENGINE
CH357240A (en) Opposed free piston machine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19920527

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 19940429

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69200696

Country of ref document: DE

Date of ref document: 19950105

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19941208

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: CL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Ref country code: FR

Ref legal event code: CD

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040413

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040423

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040428

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050513

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050513

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060131

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060131