EP2451709A1 - Device for closing fuel-dump circuit of an aircraft - Google Patents

Device for closing fuel-dump circuit of an aircraft

Info

Publication number
EP2451709A1
EP2451709A1 EP10742213A EP10742213A EP2451709A1 EP 2451709 A1 EP2451709 A1 EP 2451709A1 EP 10742213 A EP10742213 A EP 10742213A EP 10742213 A EP10742213 A EP 10742213A EP 2451709 A1 EP2451709 A1 EP 2451709A1
Authority
EP
European Patent Office
Prior art keywords
seal
circuit
frame
modifying
aircraft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10742213A
Other languages
German (de)
French (fr)
Inventor
Stéphane Mateo
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.)
Airbus Operations SAS
Original Assignee
Airbus Operations 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 Airbus Operations SAS filed Critical Airbus Operations SAS
Publication of EP2451709A1 publication Critical patent/EP2451709A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/022—Test plugs for closing off the end of a pipe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D37/00—Arrangements in connection with fuel supply for power plant
    • B64D37/02—Tanks
    • B64D37/14—Filling or emptying
    • B64D37/20—Emptying systems
    • B64D37/26—Jettisoning of fuel

Definitions

  • the invention relates to closure devices of aircraft vacuum circuits.
  • Some aircraft are equipped with a system that, when circumstances require, quickly release the fuel contained in the tanks. Such a system is called a quick-empty system. This release is referred to in English as “Fuel Dumping” and “Fuel Jettisioning”.
  • Tests would therefore be to pressurize the circuit with the tank by means of an air-helium mixture, for example at a nominal pressure of 350 hectopascals.
  • Such a device should be able to be used at the parts assembly stations on the aircraft and so-called site stations that deal with aircraft whose tanks and different fuel systems have already received kerosene. It is for this reason that such tools must meet the regulatory requirements, particularly the standards for non-electrical tools used in explosive zones. Thus, the device must allow to shut off the vacuum circuit while ensuring a proper seal with the latter to avoid any risk of accidental spillage of fuel.
  • this outlet forms a sleeve in the mouth of which the device must be introduced to form a seal from the inside between this sleeve and the device.
  • this sleeve has fastening rivets which protrude inside the sleeve so that they define a passage whose size is smaller than the dimension of the zone with which the device must seal and which is beyond. It is therefore to have a device that can cross these rivets without damaging them and achieve a satisfactory seal in the next area.
  • An object of the invention is to provide a fast-empty circuit test device which makes it possible to achieve a seal in such a configuration of the output of the circuit.
  • a shutter device of an aircraft evacuation circuit the device comprising a coupling end, the endpiece carrying a seal and means for modifying a device. dimension of the joint.
  • the tip can be given a retracted configuration and an expanded configuration in which the size of the seal is larger than in the retracted configuration. It is thus possible to pass the tip in retracted configuration in the narrow zone the output of the circuit, then to give it the extended configuration so that it achieves a seal with the output of the circuit beyond this zone.
  • the modification means are able to modify a dimension of a section, such as an edge, of the joint without modifying a dimension of another section, such as an edge, of the joint.
  • the device simplifies the implementation of the device in that it is generally easier to deform a single section of the seal that the seal in its entirety.
  • this arrangement allows to crush the seal on a portion of its length, it is not crushed over its entire length, in general.
  • the seal in the closed position, generally has a non-constant outer diameter along the length of the seal and a non-cylindrical shape.
  • the device is therefore more easily adaptable to conduits of diameters very different from each other.
  • this adaptability makes it possible initially to give the tip a total diameter much smaller than that of the duct in which it is intended to penetrate, in particular so as not to damage certain areas of the duct, for example rivets or other elements. protruding in the duct in the radial direction.
  • the modifying means occupy a main conduit of the seal.
  • the modification means are mounted movably relative to the seal.
  • the modification means have a ramp face for the seal.
  • the face has a curved profile with a center of curvature located outside the joint.
  • the modifying means are adjustable.
  • the device comprises a member, such as a capstan, for controlling the modifying means.
  • the device is able to put the duct and the nozzle into communication with gas through the gasket.
  • the device comprises in particular a flexible pneumatic conduit and a rotating connector capable of performing this communication.
  • the device comprises a frame and means independent of the end piece for fixing the frame to the circuit.
  • the function of fixing the closure device to the vacuum circuit is not exerted, at least principally, by the tip, but by the fastening means. We can therefore dedicate the tip to the achievement of the sealing function.
  • FIG. 1 is a perspective view of the device of the invention according to one embodiment
  • FIG. 2 is a perspective view of the pneumatic circuit associated with the device of FIG. 1;
  • FIG. 3 is a perspective view of the frame, the seal and the jaws of the device of Figure 1;
  • Figure 4 is a view similar to Figure 1 showing the jaws open;
  • FIG. 5 is a perspective view of an output of the empty-fast circuit of an airplane
  • FIG. 6 is a perspective view of the device of Figure 1 in use
  • FIG. 7 is a view in axial section of the device of FIG. 6 mounted on the outlet of FIG. 5;
  • FIG. 8 is a perspective view of the plug of the device of FIG. 7.
  • FIG. 6 illustrates a tool 2 comprising a pneumatic line 4 and a closure device 6 according to the invention.
  • the pneumatic line 4 comprises the following elements arranged in series following each other and in gas communication with each other: a flexible pneumatic conduit 8, a metal valve 10, a "T" connector 12, and and finally a rotating connector 14.
  • the "T" fitting carries, on its third branch, a manometer 16 provided with a protective collar 18.
  • the closure device 6 is fixed to the free end of the rotary coupling.
  • This device comprises a frame 20 of generally cylindrical shape of axis 22. It comprises, at its proximal axial end, a clevis 24 of annular shape, s' extending generally in a plane perpendicular to the axis 22.
  • This yoke carries two arms 26 arranged at diametrically opposite positions on either side of the axis 22, here in upper and lower parts respectively in the figures.
  • Each of the arms 26 is articulated to the yoke 24 about an axis 28 perpendicular to the axis 22 and non-intersecting with the latter.
  • the arms 26 may thus have a closed configuration in which they are brought closer to the frame 20 and extend parallel to the axis 22, as illustrated in FIGS. 1, 3, 6 and 7, and an open configuration in which they are inclined. relative to the axis 22 and remote from the frame 20 as shown in Figure 4.
  • Guides 30 or spacers, here the number of two, are interposed in the radial direction between the frame 20 and the arms 26.
  • the two guides 30 are identical to each other and follow one another along the axis 22.
  • the device 6 comprises a rod 32 of axis 22 connected by its axial end proximal to the rotating connector 14.
  • This rod is rotatably mounted relative to the frame 20 about the axis 22. It is immobilized in translation relative to the frame 20.
  • the rod 32 has, at its distal axial end, a male threaded portion on which is fixed, by means of a female threaded portion, a plug or actuator 34.
  • the main part of the rod is formed by a piece 36 and the thread of the rod is carried by an end piece 38 attached to the main portion 36 being rigidly fixed thereto.
  • the plug 34 is symmetrical of revolution about the axis 22. It comprises a base 40 which has the female threaded part ensuring the connection with the rod. It comprises an actuating part or cam 42 which has in particular an outer face 44 whose diameter increases from its proximal end to its distal end. This face has a convex profile in a radial plane to the axis 22, this profile having a center of curvature extending outside the actuating portion 42. In other words, the face 44 extends between the center of curvature and the axis 22. The face 44 thus has a corolla shape.
  • the actuating portion 42 is fixed to the base 40 by means of screws, here three in number, extending parallel to the axis 22 and regularly distributed around the latter.
  • the orifices associated with these screws pass right through the base 40.
  • the cap comprises a protective flange 45 of the free end of the actuating part, also screwed in a similar manner to the latter.
  • the frame 20 carries a seal 31 symmetry of revolution about the axis 22, of cylindrical shape and recessed at its center.
  • the seal 31 is fixed rigidly by its axial end proximal to the distal end of the frame 20 while its distal axial end is left free.
  • the seal 31 is for example made of EPDM material
  • the device comprises adjustable control means for moving the actuating portion 42 relative to the seal.
  • these means comprise a capstan 47 which comprises two radial arms 48 carrying respective handles 50 in the form of balls.
  • the capstan is rigidly fixed to the proximal axial end of the rod 32.
  • Means are provided to prevent rotation of the cap 34 relative to the frame, which comprise for example a key 46 rigidly fixed to the frame, extending in a direction radial to the axis 22, and movable in a groove 47 of the plug parallel to the axis 22. Thanks to the helical connection between the rod 32 and the plug 34, the rotation of the capstan about the axis 22 relative to to the frame causes the sliding of the plug along the axis 22 relative to the seal 31.
  • the seal 31 is supported by its inner face against the outer face 44 of the cap.
  • the stopper 34 occupies its position closest to the frame, that is to say the leftmost frame in FIG. 7, the greater part of the seal rests on the face 44.
  • the distal end region of the seal 31 has an outside diameter d greater than in the retracted configuration, as illustrated in FIGS. 6 and 7.
  • the diameter d is greater than the outer diameter of the proximal end zone of the seal because it bears on the distal end zone of the face 44.
  • the rod 32 has a distal cavity 62 in communication with a through cavity 64 of the plug.
  • the stem also has a proximal cavity 66 in communication with the rotating connector 14.
  • the two cavities 62 and 66 of the rod are in mutual communication through radial orifices and via the center of the frame.
  • the seal 31 and the plug 34 form a coupling end 43.
  • FIG. 5 illustrates an exit duct of a vacuum-fast circuit of an aircraft such as an airplane.
  • Such outlet ducts are located near the trailing edge of the wings for example.
  • This duct has here, from left to right, a mouth zone 50, a fixing zone 52 and a bearing zone 54 following in this order.
  • the attachment zone comprises rivets which extend inside the duct projecting from its internal face. In this zone, no contact is therefore allowed between the tip 43 and the conduit 48.
  • the zones 50 and 54 have a cylindrical shape while the zone 52 has a flared shape.
  • the inner diameter of the zone 54 is smaller than that of the zone 50.
  • Tooling 2 is used as follows.
  • the pneumatic line 4 is not fixed to the device 6.
  • the tip 43 has its retracted configuration.
  • the plug 34 is in its position furthest from the frame.
  • the plug 34 is in the extended position.
  • the arms 26 are in the open position.
  • the tip 43 is inserted into the duct 48 by passing through the zones 50 and 52 until it reaches the zone 54. As illustrated in FIG. 7, the zone 50 then extends radially between the struts 30 and the frame. on the one hand, and the arms 26 on the other.
  • the arms 26 are brought closer to the axis 22 and immobilized in the closed position.
  • the arms carry at their free end respective half-collars 60 which can be fixed to each other by means of bolts comprising in particular a screw 63 and a button 61 acting as a nut and traversed by the opinion .
  • each half-collar 60 has an inner surface 65 undercut resting against a corresponding flank face of the zone 50. The cooperation of these two faces prevents the withdrawal of the device by sliding along the axis 22.
  • the free end of the duct 48 is in axial abutment against the yoke 24.
  • the device 6 is thus rigidly fixed to the duct 48.
  • the handles 50 of the capstan 46 are then maneuvered to turn the capstan 46 and thus slide the cap 34 towards the frame. This movement causes sliding of the seal 31 on the ramp face 44 and the deformation of the seal with an increase in the diameter d of its distal end edge.
  • the pneumatic line 4 is then connected to the device 6 and the necessary tests can be carried out, in particular by means of the manometer 16 which makes it possible to visually check the pressure inside the vacuum-fast circuit.
  • the tip can be adapted to conduits 48 of different diameters.
  • the device removably and removably adapts at the outlet of the vacuum circuit to temporarily seal it and visualize the pressure therein during leak tests. It ensures easy connection to the vacuum circuit by avoiding contact with the parts carrying the rivets. It allows purging once the test is done.
  • the seal 31 may have an annular shape other than circular so that the modifiable dimension will not necessarily be a diameter.
  • the device of the invention can be used with other types of fast-empty circuit, in particular free of rivets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gasket Seals (AREA)
  • Pipe Accessories (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Sealing Devices (AREA)

Abstract

The invention relates to a device (6) for closing a fuel-dump circuit (48) of an aircraft, including a coupling tip (43). The tip has a seal (31) and a means (34) for changing a dimension (d) of the seal.

Description

Dispositif d'obturation d'un circuit vide-vite d'aéronef  Device for shutting off an aircraft vacuum circuit
L'invention concerne les dispositifs d'obturation des circuits vide-vite d'aéronefs. Certains avions sont pourvus d'un système permettant, lorsque les circonstances l'exigent, de larguer rapidement le carburant contenu dans les réservoirs. Un tel système est appelé un système vide-vite. Ce largage est désigné en anglais par les termes "Fuel Dumping" et "Fuel Jettisioning". The invention relates to closure devices of aircraft vacuum circuits. Some aircraft are equipped with a system that, when circumstances require, quickly release the fuel contained in the tanks. Such a system is called a quick-empty system. This release is referred to in English as "Fuel Dumping" and "Fuel Jettisioning".
Pour s'assurer du bon fonctionnement de ce circuit de vidange rapide, il est nécessaire d'en vérifier l'étanchéité. Des essais consisteraient donc à mettre sous pression le circuit avec le réservoir au moyen d'un mélange air-hélium, par exemple à une pression nominale de 350 hectopascals.  To ensure proper operation of this quick drain circuit, it is necessary to check the tightness. Tests would therefore be to pressurize the circuit with the tank by means of an air-helium mixture, for example at a nominal pressure of 350 hectopascals.
On souhaite donc disposer d'un dispositif qui permette d'obturer le circuit vide- vite en s'adaptant à la sortie du circuit, de visualiser la pression régnant dans le circuit et aussi de purger le circuit lorsque les essais d'étanchéité sont terminés.  It is therefore desired to have a device that makes it possible to close the vacuum circuit by adapting to the output of the circuit, to visualize the pressure prevailing in the circuit and also to purge the circuit when the leakage tests are completed. .
Un tel dispositif devrait pouvoir être utilisé au niveau des postes de montage des pièces sur l'avion et des postes dits de chantier qui traitent des avions dont les réservoirs et les différents circuits de carburant ont déjà reçu du kérosène. C'est pour cette raison qu'un tel outillage doit répondre aux exigences réglementaires, en particulier aux normes relatives aux outillages non électriques utilisables en zone explosive. Ainsi, le dispositif doit permettre d'obturer le circuit vide-vite tout en assurant une étanchéité correcte avec ce dernier pour éviter tout risque de déversement accidentel de carburant.  Such a device should be able to be used at the parts assembly stations on the aircraft and so-called site stations that deal with aircraft whose tanks and different fuel systems have already received kerosene. It is for this reason that such tools must meet the regulatory requirements, particularly the standards for non-electrical tools used in explosive zones. Thus, the device must allow to shut off the vacuum circuit while ensuring a proper seal with the latter to avoid any risk of accidental spillage of fuel.
En outre, le dispositif ne doit pas blesser les parties métalliques de l'avion. A cet égard, un problème que pose la réalisation de ce dispositif découle de la configuration de la sortie du circuit vide-vite sur certains avions. En effet, cette sortie forme un manchon dans l'embouchure duquel on doit introduire le dispositif afin de former une étanchéité par l'intérieur entre ce manchon et le dispositif. Toutefois, ce manchon présente des rivets de fixation qui s'étendent en saillie à l'intérieur du manchon de telle sorte qu'ils définissent un passage dont la dimension est inférieure à la dimension de la zone avec laquelle le dispositif doit effectuer une étanchéité et qui se trouve au-delà. Il s'agit donc de disposer d'un dispositif qui puisse franchir ces rivets sans les détériorer et réaliser une étanchéité satisfaisante dans la zone suivante.  In addition, the device must not injure the metal parts of the aircraft. In this regard, a problem posed by the realization of this device arises from the configuration of the output of the circuit-empty-fast on some aircraft. Indeed, this outlet forms a sleeve in the mouth of which the device must be introduced to form a seal from the inside between this sleeve and the device. However, this sleeve has fastening rivets which protrude inside the sleeve so that they define a passage whose size is smaller than the dimension of the zone with which the device must seal and which is beyond. It is therefore to have a device that can cross these rivets without damaging them and achieve a satisfactory seal in the next area.
Un but de l'invention est de réaliser un dispositif de test de circuit vide-vite, qui permette de réaliser une étanchéité dans une telle configuration de la sortie du circuit. A cet effet, on prévoit selon l'invention un dispositif d'obturation d'un circuit vide- vite d'aéronef, le dispositif comprenant un embout d'accouplement, l'embout portant un joint d'étanchéité et des moyens pour modifier une dimension du joint. An object of the invention is to provide a fast-empty circuit test device which makes it possible to achieve a seal in such a configuration of the output of the circuit. For this purpose, provision is made according to the invention a shutter device of an aircraft evacuation circuit, the device comprising a coupling end, the endpiece carrying a seal and means for modifying a device. dimension of the joint.
Ainsi, on peut donner à l'embout, au choix, une configuration rétractée et une configuration étendue dans laquelle le dimension du joint est plus grande que dans la configuration rétractée. On peut donc faire passer l'embout en configuration rétractée dans la zone étroite la sortie du circuit, puis lui donner la configuration étendue pour qu'il réalise une étanchéité avec la sortie du circuit au-delà de cette zone.  Thus, the tip can be given a retracted configuration and an expanded configuration in which the size of the seal is larger than in the retracted configuration. It is thus possible to pass the tip in retracted configuration in the narrow zone the output of the circuit, then to give it the extended configuration so that it achieves a seal with the output of the circuit beyond this zone.
Avantageusement, les moyens de modification sont aptes à modifier une dimension d'un tronçon, tel qu'un bord, du joint sans modifier une dimension d'un autre tronçon, tel qu'un bord, du joint.  Advantageously, the modification means are able to modify a dimension of a section, such as an edge, of the joint without modifying a dimension of another section, such as an edge, of the joint.
Ainsi, on simplifie la réalisation du dispositif dans la mesure où il est en général plus facile de déformer un simple tronçon du joint que le joint dans son entier. De plus, cet agencement permettant de n'écraser le joint que sur un tronçon de sa longueur, il ne se trouve pas écrasé sur toute sa longueur, en général. Notamment, en position d'obturation, le joint présente en général un diamètre externe non constant suivant la longueur du joint et une forme non cylindrique. Le dispositif est par conséquent plus facilement adaptable à des conduits de diamètres très différents les uns des autres. Au surplus, cette adaptabilité permet de donner initialement à l'embout un diamètre total très inférieur à celui du conduit dans lequel il est destiné à pénétrer, notamment afin de ne pas endommager certaines zones du conduit, par exemple des rivets ou d'autres éléments faisant saillie dans le conduit en direction radiale.  Thus, it simplifies the implementation of the device in that it is generally easier to deform a single section of the seal that the seal in its entirety. In addition, this arrangement allows to crush the seal on a portion of its length, it is not crushed over its entire length, in general. In particular, in the closed position, the seal generally has a non-constant outer diameter along the length of the seal and a non-cylindrical shape. The device is therefore more easily adaptable to conduits of diameters very different from each other. Moreover, this adaptability makes it possible initially to give the tip a total diameter much smaller than that of the duct in which it is intended to penetrate, in particular so as not to damage certain areas of the duct, for example rivets or other elements. protruding in the duct in the radial direction.
De préférence, les moyens de modification occupent un conduit principal du joint.  Preferably, the modifying means occupy a main conduit of the seal.
Ainsi, ces moyens sont particulièrement peu encombrants et n'augmentent pas sensiblement les dimensions du dispositif.  Thus, these means are particularly compact and do not significantly increase the dimensions of the device.
Avantageusement, les moyens de modification sont montés mobiles par rapport au joint.  Advantageously, the modification means are mounted movably relative to the seal.
Avantageusement, les moyens de modification présentent une face formant rampe pour le joint.  Advantageously, the modification means have a ramp face for the seal.
Ainsi, c'est par glissement sur la face formant rampe que l'on modifie le diamètre du joint.  Thus, it is by sliding on the ramp face that the diameter of the seal is changed.
De préférence, la face présente un profil courbe à centre de courbure situé à l'extérieur du joint.  Preferably, the face has a curved profile with a center of curvature located outside the joint.
Ainsi, plus le diamètre du joint augmente, plus sa déformation est rapide. De préférence, les moyens de modification sont réglables. Thus, the greater the diameter of the joint increases, the more its deformation is fast. Preferably, the modifying means are adjustable.
Avantageusement, le dispositif comprend un organe, tel qu'un cabestan, pour la commande des moyens de modification.  Advantageously, the device comprises a member, such as a capstan, for controlling the modifying means.
De préférence, le dispositif est apte à mettre en communication de gaz le conduit et l'embout à travers le joint.  Preferably, the device is able to put the duct and the nozzle into communication with gas through the gasket.
Le dispositif comprend notamment un conduit pneumatique souple et un raccord tournant aptes à effectuer cette mise en communication.  The device comprises in particular a flexible pneumatic conduit and a rotating connector capable of performing this communication.
Avantageusement, le dispositif comprend un bâti et des moyens indépendants de l'embout pour la fixation du bâti au circuit.  Advantageously, the device comprises a frame and means independent of the end piece for fixing the frame to the circuit.
Ainsi, la fonction de fixation du dispositif d'obturation au circuit vide-vite n'est pas exercée, à tout le moins à titre principal, par l'embout, mais par les moyens de fixation. On peut donc dédier l'embout à la réalisation de la fonction d'étanchéité.  Thus, the function of fixing the closure device to the vacuum circuit is not exerted, at least principally, by the tip, but by the fastening means. We can therefore dedicate the tip to the achievement of the sealing function.
On prévoit également selon l'invention un procédé pour obturer un circuit vide- vite d'aéronef au moyen d'un dispositif qui comprend un embout d'accouplement portant un joint d'étanchéité et des moyens pour modifier une dimension du joint, There is also provided according to the invention a method for closing off an aircraft evacuation circuit by means of a device which comprises a coupling end bearing a seal and means for modifying a dimension of the joint,
D'autres caractéristiques et avantages de l'invention apparaîtront encore dans la description suivante d'un mode de réalisation donné à titre d'exemple non limitatif en référence aux dessins annexés sur lesquels : Other features and advantages of the invention will become apparent in the following description of an embodiment given by way of non-limiting example with reference to the accompanying drawings in which:
- la figure 1 est une vue en perspective du dispositif de l'invention selon un mode de réalisation;  - Figure 1 is a perspective view of the device of the invention according to one embodiment;
- la figure 2 est une vue en perspective du circuit pneumatique associé au dispositif de la figure 1 ;  FIG. 2 is a perspective view of the pneumatic circuit associated with the device of FIG. 1;
- la figure 3 est une vue en perspective du bâti, du joint et des mâchoires du dispositif de la figure 1 ;  - Figure 3 is a perspective view of the frame, the seal and the jaws of the device of Figure 1;
- la figure 4 est une vue analogue à la figure 1 montrant les mâchoires ouvertes ;  - Figure 4 is a view similar to Figure 1 showing the jaws open;
- la figure 5 est une vue en perspective d'une sortie du circuit vide-vite d'un avion ;  FIG. 5 is a perspective view of an output of the empty-fast circuit of an airplane;
- la figure 6 est une vue en perspective du dispositif de la figure 1 en cours d'utilisation ;  - Figure 6 is a perspective view of the device of Figure 1 in use;
- la figure 7 est une vue en coupe axiale du dispositif de la figure 6 monté sur la sortie de la figure 5 ; et  FIG. 7 is a view in axial section of the device of FIG. 6 mounted on the outlet of FIG. 5; and
- la figure 8 est une vue en perspective du bouchon du dispositif de la figure 7. On a illustré notamment à la figure 6 un outillage 2 comprenant une ligne pneumatique 4 et un dispositif d'obturation 6 selon l'invention. La ligne pneumatique 4 comprend les éléments suivants disposés en série à la suite les uns des autres et en communication de gaz les uns avec les autres: un conduit pneumatique souple 8, une vanne 10 en métal, un raccord 12 en "T", et enfin un raccord tournant 14. Le raccord en "T" porte, sur sa troisième branche, un manomètre 16 muni d'une collerette de protection 18. Le dispositif d'obturation 6 est fixé à l'extrémité libre du raccord tournant. FIG. 8 is a perspective view of the plug of the device of FIG. 7. In particular, FIG. 6 illustrates a tool 2 comprising a pneumatic line 4 and a closure device 6 according to the invention. The pneumatic line 4 comprises the following elements arranged in series following each other and in gas communication with each other: a flexible pneumatic conduit 8, a metal valve 10, a "T" connector 12, and and finally a rotating connector 14. The "T" fitting carries, on its third branch, a manometer 16 provided with a protective collar 18. The closure device 6 is fixed to the free end of the rotary coupling.
Nous allons maintenant décrire le dispositif d'obturation notamment en référence à la figure 7. Ce dispositif comprend un bâti 20 de forme générale cylindrique d'axe 22. Il comprend, à son extrémité axiale proximale, une chape 24 de forme annulaire, s'étendant globalement dans un plan perpendiculaire à l'axe 22. We will now describe the closure device in particular with reference to Figure 7. This device comprises a frame 20 of generally cylindrical shape of axis 22. It comprises, at its proximal axial end, a clevis 24 of annular shape, s' extending generally in a plane perpendicular to the axis 22.
Cette chape porte deux bras 26 disposés à des positions diamétralement opposées de part et d'autre de l'axe 22, ici en parties supérieure et inférieure respectivement sur les figures. Chacun des bras 26 est articulé à la chape 24 autour d'un axe 28 perpendiculaire à l'axe 22 et non sécant avec ce dernier. Les bras 26 peuvent ainsi avoir une configuration fermée dans laquelle ils sont rapprochés du bâti 20 et s'étendent parallèlement à l'axe 22, comme illustré sur les figures 1 , 3, 6 et 7, et une configuration ouverte dans laquelle ils sont inclinés par rapport à l'axe 22 et éloignés du bâti 20 comme illustré à la figure 4. Des guides 30 ou entretoises, ici au nombre de deux, sont interposés suivant la direction radiale entre le bâti 20 et les bras 26. Les deux guides 30 sont identiques entre eux et se succèdent le long de l'axe 22. This yoke carries two arms 26 arranged at diametrically opposite positions on either side of the axis 22, here in upper and lower parts respectively in the figures. Each of the arms 26 is articulated to the yoke 24 about an axis 28 perpendicular to the axis 22 and non-intersecting with the latter. The arms 26 may thus have a closed configuration in which they are brought closer to the frame 20 and extend parallel to the axis 22, as illustrated in FIGS. 1, 3, 6 and 7, and an open configuration in which they are inclined. relative to the axis 22 and remote from the frame 20 as shown in Figure 4. Guides 30 or spacers, here the number of two, are interposed in the radial direction between the frame 20 and the arms 26. The two guides 30 are identical to each other and follow one another along the axis 22.
Le dispositif 6 comprend une tige 32 d'axe 22 raccordée par son extrémité axiale proximale au raccord tournant 14. Cette tige est montée mobile à rotation par rapport au bâti 20 autour de l'axe 22. Elle est immobilisée en translation par rapport au bâti 20. La tige 32 présente, à son extrémité axiale distale, une partie mâle filetée sur laquelle est fixée, au moyen d'une partie femelle filetée, un bouchon ou actionneur 34. Dans le présent exemple, la partie principale de la tige est formée par une pièce 36 et le filet de la tige est porté par une pièce d'extrémité 38 rapportée à la partie principale 36 en étant rigidement fixée à cette dernière.  The device 6 comprises a rod 32 of axis 22 connected by its axial end proximal to the rotating connector 14. This rod is rotatably mounted relative to the frame 20 about the axis 22. It is immobilized in translation relative to the frame 20. The rod 32 has, at its distal axial end, a male threaded portion on which is fixed, by means of a female threaded portion, a plug or actuator 34. In the present example, the main part of the rod is formed by a piece 36 and the thread of the rod is carried by an end piece 38 attached to the main portion 36 being rigidly fixed thereto.
Le bouchon 34 est à symétrie de révolution autour de l'axe 22. Il comprend une base 40 qui présente la partie femelle filetée assurant la liaison avec la tige. Il comprend une partie d'actionnement ou came 42 qui présente notamment une face externe 44 dont le diamètre va en augmentant depuis son extrémité proximale jusqu'à son extrémité distale. Cette face présente un profil convexe dans un plan radial à l'axe 22, ce profil ayant un centre de courbure s'étendant à l'extérieur de la partie d'actionnement 42. En d'autres termes, la face 44 s'étend entre le centre de courbure et l'axe 22. La face 44 a ainsi une forme en corolle. Dans le présent exemple, la partie d'actionnement 42 est fixée à la base 40 au moyen de vis, ici au nombre de trois, s'étendant parallèlement à l'axe 22 et régulièrement réparties autour de ce dernier. Les orifices associés à ces vis traversent de part en part la base 40. Le bouchon comprend une collerette de protection 45 de l'extrémité libre de la partie d'actionnement, également vissée de façon analogue à cette dernière. The plug 34 is symmetrical of revolution about the axis 22. It comprises a base 40 which has the female threaded part ensuring the connection with the rod. It comprises an actuating part or cam 42 which has in particular an outer face 44 whose diameter increases from its proximal end to its distal end. This face has a convex profile in a radial plane to the axis 22, this profile having a center of curvature extending outside the actuating portion 42. In other words, the face 44 extends between the center of curvature and the axis 22. The face 44 thus has a corolla shape. In the present example, the actuating portion 42 is fixed to the base 40 by means of screws, here three in number, extending parallel to the axis 22 and regularly distributed around the latter. The orifices associated with these screws pass right through the base 40. The cap comprises a protective flange 45 of the free end of the actuating part, also screwed in a similar manner to the latter.
Le bâti 20 porte un joint d'étanchéité 31 à symétrie de révolution autour de l'axe 22, de forme cylindrique et évidé en son centre. Le joint 31 est fixé rigidement par son extrémité axiale proximale à l'extrémité distale du bâti 20 tandis que son extrémité axiale distale est laissée libre. Le joint 31 est par exemple réalisé en matériau EPDM The frame 20 carries a seal 31 symmetry of revolution about the axis 22, of cylindrical shape and recessed at its center. The seal 31 is fixed rigidly by its axial end proximal to the distal end of the frame 20 while its distal axial end is left free. The seal 31 is for example made of EPDM material
(Ethylène Propylène Diène Monomère) à dureté shore 70 Sh. La partie d'actionnement 42 du bouchon occupe l'espace central du joint 31. (Ethylene Propylene Diene Monomer) Shore hardness 70 Sh. The actuating portion 42 of the plug occupies the central space of the joint 31.
Le dispositif comprend des moyens de commande réglables pour déplacer la partie d'actionnement 42 par rapport au joint. Dans le présent exemple, ces moyens comprennent un cabestan 47 qui comporte deux bras radiaux 48 portant des poignées respectives 50 en forme de boules. Le cabestan est rigidement fixé à l'extrémité axiale proximale de la tige 32. Des moyens sont prévus pour empêcher la rotation du bouchon 34 par rapport au bâti, qui comprennent par exemple une clavette 46 fixée rigidement au bâti, s'étendant suivant une direction radiale à l'axe 22, et mobile dans une rainure 47 du bouchon parallèle à l'axe 22. Grâce à la liaison hélicoïdale entre la tige 32 et le bouchon 34, la mise en rotation du cabestan autour de l'axe 22 par rapport au bâti provoque le coulissement du bouchon le long de l'axe 22 par rapport au joint 31.  The device comprises adjustable control means for moving the actuating portion 42 relative to the seal. In the present example, these means comprise a capstan 47 which comprises two radial arms 48 carrying respective handles 50 in the form of balls. The capstan is rigidly fixed to the proximal axial end of the rod 32. Means are provided to prevent rotation of the cap 34 relative to the frame, which comprise for example a key 46 rigidly fixed to the frame, extending in a direction radial to the axis 22, and movable in a groove 47 of the plug parallel to the axis 22. Thanks to the helical connection between the rod 32 and the plug 34, the rotation of the capstan about the axis 22 relative to to the frame causes the sliding of the plug along the axis 22 relative to the seal 31.
Le joint 31 est en appui par sa face interne contre la face externe 44 du bouchon.  The seal 31 is supported by its inner face against the outer face 44 of the cap.
Lorsque le bouchon occupe sa position la plus avancée par rapport au bâti, c'est-à-dire la plus à droite sur la figure 7, seule la partie d'extrémité libre du joint 31 est en appui contre la face 44, sur la zone proximale de cette dernière qui a une forme cylindrique ou quasi cylindrique. Le joint 31 a donc une configuration rétractée proche de sa forme cylindrique d'origine. Le diamètre externe d du bord distal du joint est réduit, comme sur les figures 1 , 3 et 4.  When the plug occupies its most advanced position relative to the frame, that is to say the rightmost frame in FIG. 7, only the free end portion of the seal 31 bears against the face 44, on the proximal zone of the latter which has a cylindrical or quasi-cylindrical shape. The seal 31 therefore has a retracted configuration close to its original cylindrical shape. The outer diameter d of the distal edge of the joint is reduced, as in Figures 1, 3 and 4.
Au contraire, lorsque le bouchon 34 occupe sa position la plus proche du bâti, c'est-à-dire la plus à gauche sur la figure 7, la plus grande partie du joint est en appui sur la face 44. Précisément, dans le présent exemple, la zone d'extrémité distale du joint 31 présente un diamètre externe d plus grand que dans la configuration rétractée, comme illustré aux figures 6 et 7. Par ailleurs, puisque seule la partie distale du joint 31 est déformée, le diamètre d est supérieur au diamètre externe de la zone d'extrémité proximale du joint car elle est en appui sur la zone d'extrémité distale de la face 44. On the other hand, when the stopper 34 occupies its position closest to the frame, that is to say the leftmost frame in FIG. 7, the greater part of the seal rests on the face 44. Precisely, in the In this example, the distal end region of the seal 31 has an outside diameter d greater than in the retracted configuration, as illustrated in FIGS. 6 and 7. Moreover, since only the portion distal of the seal 31 is deformed, the diameter d is greater than the outer diameter of the proximal end zone of the seal because it bears on the distal end zone of the face 44.
La tige 32 présente une cavité distale 62 en communication avec une cavité débouchante 64 du bouchon. La tige présente aussi une cavité proximale 66 en communication avec le raccord tournant 14. Les deux cavités 62 et 66 de la tige sont en communication mutuelle par des orifices radiaux et via le centre du bâti.  The rod 32 has a distal cavity 62 in communication with a through cavity 64 of the plug. The stem also has a proximal cavity 66 in communication with the rotating connector 14. The two cavities 62 and 66 of the rod are in mutual communication through radial orifices and via the center of the frame.
Le joint 31 et le bouchon 34 forment un embout d'accouplement 43.  The seal 31 and the plug 34 form a coupling end 43.
On a illustré à la figure 5 un conduit de sortie d'un circuit vide-vite d'un aéronef tel qu'un avion. De tels conduits de sortie sont situés à proximité du bord de fuite des ailes par exemple. Ce conduit présente ici, de gauche à droite, une zone d'embouchure 50, une zone de fixation 52 et une zone d'appui 54 se faisant suite dans cet ordre. La zone de fixation comprend des rivets qui s'étendent à l'intérieur du conduit en saillie de sa face interne. Dans cette zone, aucun contact n'est donc autorisé entre l'embout 43 et le conduit 48. En l'espèce, les zones 50 et 54 ont une forme cylindrique tandis que la zone 52 a une forme évasée. Le diamètre interne de la zone 54 est inférieur à celui de la zone 50.  FIG. 5 illustrates an exit duct of a vacuum-fast circuit of an aircraft such as an airplane. Such outlet ducts are located near the trailing edge of the wings for example. This duct has here, from left to right, a mouth zone 50, a fixing zone 52 and a bearing zone 54 following in this order. The attachment zone comprises rivets which extend inside the duct projecting from its internal face. In this zone, no contact is therefore allowed between the tip 43 and the conduit 48. In this case, the zones 50 and 54 have a cylindrical shape while the zone 52 has a flared shape. The inner diameter of the zone 54 is smaller than that of the zone 50.
L'outillage 2 est utilisé de la façon suivante.  Tooling 2 is used as follows.
Au départ, la ligne pneumatique 4 n'est pas fixée au dispositif 6. L'embout 43 présente sa configuration rétractée. Ainsi, le bouchon 34 est dans sa position la plus éloignée du bâti. Le bouchon 34 est en position sortie. Les bras 26 sont en position ouverte.  Initially, the pneumatic line 4 is not fixed to the device 6. The tip 43 has its retracted configuration. Thus, the plug 34 is in its position furthest from the frame. The plug 34 is in the extended position. The arms 26 are in the open position.
On insère l'embout 43 dans le conduit 48 en lui faisant traverser les zones 50 et 52 jusqu'à atteindre la zone 54. Comme illustré à la figure 7, la zone 50 s'étend alors radialement entre les entretoises 30 et le bâti d'une part, et les bras 26 d'autre part.  The tip 43 is inserted into the duct 48 by passing through the zones 50 and 52 until it reaches the zone 54. As illustrated in FIG. 7, the zone 50 then extends radially between the struts 30 and the frame. on the one hand, and the arms 26 on the other.
Une fois que l'embout 43, notamment le bord avant du joint 31 , s'étend en regard de la partie 54 du conduit, on rapproche les bras 26 de l'axe 22 et on les immobilise en position fermée. Dans le présent exemple, les bras portent à leur extrémité libre des demi-colliers respectifs 60 qui peuvent être fixés l'un à l'autre au moyen de boulons comprenant notamment une vis 63 et un bouton 61 faisant fonction d'écrou et traversé par la vis .  Once the tip 43, in particular the front edge of the seal 31, extends opposite the portion 54 of the conduit, the arms 26 are brought closer to the axis 22 and immobilized in the closed position. In the present example, the arms carry at their free end respective half-collars 60 which can be fixed to each other by means of bolts comprising in particular a screw 63 and a button 61 acting as a nut and traversed by the opinion .
Dans le présent exemple, chaque demi-collier 60 présente une face interne 65 en contre-dépouille venant en appui contre une face en dépouille correspondante de la zone 50. La coopération de ces deux faces empêche le retrait du dispositif par coulissement suivant l'axe 22. L'extrémité libre du conduit 48 est en butée axiale contre la chape 24. Le dispositif 6 se trouve ainsi rigidement fixé au conduit 48. On manœuvre ensuite les poignées 50 du cabestan 46 pour faire tourner ce dernier et ainsi faire coulisser le bouchon 34 en direction du bâti. Ce mouvement entraîne le glissement du joint 31 sur la face de rampe 44 et la déformation du joint avec une augmentation du diamètre d de son bord d'extrémité distale. Le joint finit par venir en appui radial par ce bord contre la face interne de la zone 54 du conduit, réalisant ainsi une étanchéité entre le bouchon et le conduit. In the present example, each half-collar 60 has an inner surface 65 undercut resting against a corresponding flank face of the zone 50. The cooperation of these two faces prevents the withdrawal of the device by sliding along the axis 22. The free end of the duct 48 is in axial abutment against the yoke 24. The device 6 is thus rigidly fixed to the duct 48. The handles 50 of the capstan 46 are then maneuvered to turn the capstan 46 and thus slide the cap 34 towards the frame. This movement causes sliding of the seal 31 on the ramp face 44 and the deformation of the seal with an increase in the diameter d of its distal end edge. The seal ends up coming in radial support by this edge against the inner face of the zone 54 of the duct, thereby providing a seal between the plug and the duct.
On connecte ensuite la ligne pneumatique 4 au dispositif 6 et on peut procéder aux essais nécessaires, notamment au moyen du manomètre 16 qui permet de contrôler visuellement la pression à l'intérieur du circuit vide-vite.  The pneumatic line 4 is then connected to the device 6 and the necessary tests can be carried out, in particular by means of the manometer 16 which makes it possible to visually check the pressure inside the vacuum-fast circuit.
Grâce au fait que le cabestan forme des moyens de commande réglables du diamètre du joint 31 , l'embout peut être adapté à des conduits 48 de différents diamètres.  Due to the fact that the capstan forms adjustable control means of the diameter of the seal 31, the tip can be adapted to conduits 48 of different diameters.
On observera que la fixation de l'outillage 6 au moyen des bras s'effectue sans que ces derniers ne viennent en contact avec les deux couronnes de la zone 52 portant les rivets.  It will be observed that the attachment of the tool 6 by means of the arms is effected without the latter coming into contact with the two crowns of the zone 52 carrying the rivets.
Comme on le voit, le dispositif s'adapte de façon amovible et démontable à la sortie du circuit vide-vite pour l'obturer temporairement et visualiser la pression dans celui-ci lors d'essais d'étanchéité. Il assure une connexion aisée au circuit vide-vite en évitant les contacts avec les parties portant les rivets. Il permet la purge une fois le test effectué.  As can be seen, the device removably and removably adapts at the outlet of the vacuum circuit to temporarily seal it and visualize the pressure therein during leak tests. It ensures easy connection to the vacuum circuit by avoiding contact with the parts carrying the rivets. It allows purging once the test is done.
Bien entendu, on pourra apporter à l'invention de nombreuses modifications sans sortir du cadre de celle-ci.  Of course, we can bring to the invention many changes without departing from the scope thereof.
Le joint 31 pourra avoir une forme annulaire autre que circulaire de sorte que la dimension modifiable ne sera pas nécessairement un diamètre. Le dispositif de l'invention est utilisable avec d'autres types de circuit vide-vite, notamment exempts de rivets.  The seal 31 may have an annular shape other than circular so that the modifiable dimension will not necessarily be a diameter. The device of the invention can be used with other types of fast-empty circuit, in particular free of rivets.

Claims

REVENDICATIONS
1. Dispositif (6) d'obturation d'un circuit vide-vite (48) d'aéronef, caractérisé en ce qu'il comprend un embout d'accouplement (43), l'embout portant un joint d'étanchéité (31 ) et des moyens (34) aptes à modifier une dimension (d) d'un tronçon, tel qu'un bord, du joint (31 ) sans modifier une dimension d'un autre tronçon, tel qu'un bord, du joint. 1. Device (6) for sealing an aircraft vacuum circuit (48), characterized in that it comprises a coupling end (43), the end piece carrying a seal (31). ) and means (34) adapted to modify a dimension (d) of a section, such as an edge, of the seal (31) without modifying a dimension of another section, such as an edge, of the seal.
2. Dispositif selon la revendication précédente dans lequel les moyens de modification (34) occupent un conduit principal du joint (31 ).  2. Device according to the preceding claim wherein the modification means (34) occupy a main conduit of the seal (31).
3. Dispositif selon au moins l'une quelconque des revendications précédentes dans lequel les moyens de modification (34) sont montés mobiles par rapport au joint (31 ).  3. Device according to at least one of the preceding claims wherein the modifying means (34) are movably mounted relative to the seal (31).
4. Dispositif selon au moins l'une quelconque des revendications précédentes dans lequel les moyens de modification (34) présentent une face (44) formant rampe pour le joint (31 ).  4. Device according to at least one of the preceding claims wherein the modifying means (34) have a face (44) forming a ramp for the seal (31).
5. Dispositif selon la revendication précédente dans lequel la face (44) présente un profil courbe à centre de courbure situé à l'extérieur du joint (31 ).  5. Device according to the preceding claim wherein the face (44) has a curved profile with a center of curvature located outside the seal (31).
6. Dispositif selon au moins l'une quelconque des revendications précédentes dans lequel les moyens de modification (34) sont réglables.  6. Device according to at least one of the preceding claims wherein the modifying means (34) are adjustable.
7. Dispositif selon au moins l'une quelconque des revendications précédentes qui comprend un organe, tel qu'un cabestan (47), pour la commande des moyens de modification (34).  Apparatus according to at least one of the preceding claims which comprises a member, such as a capstan (47), for controlling the modifying means (34).
8. Dispositif selon au moins l'une quelconque des revendications précédentes, apte à mettre en communication de gaz le conduit et l'embout (43) à travers le joint (31 ), le dispositif comprenant notamment un conduit pneumatique souple (8) et un raccord tournant (14) aptes à effectuer cette mise en communication.  8. Device according to at least one of the preceding claims, adapted to put in communication the gas conduit and the tip (43) through the seal (31), the device comprising in particular a flexible pneumatic conduit (8) and a rotary connection (14) capable of performing this communication.
9. Dispositif selon au moins l'une quelconque des revendications précédentes, qui comprend un bâti (20) et des moyens (26) indépendants de l'embout (43) pour la fixation du bâti au circuit (48).  9. Device according to at least one of the preceding claims, which comprises a frame (20) and means (26) independent of the end piece (43) for fixing the frame to the circuit (48).
10. Procédé pour obturer un circuit vide-vite (48) d'aéronef, caractérisé en ce qu'on obture le circuit au moyen d'un dispositif qui comprend un embout d'accouplement (43) portant un joint d'étanchéité (31 ) et des moyens (34) pour modifier une dimension (d) du joint.  10. A method for closing an aircraft vacuum circuit (48), characterized in that the circuit is closed by means of a device which comprises a coupling end (43) carrying a seal (31). ) and means (34) for modifying a dimension (d) of the joint.
EP10742213A 2009-07-10 2010-07-07 Device for closing fuel-dump circuit of an aircraft Withdrawn EP2451709A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0954824A FR2947807B1 (en) 2009-07-10 2009-07-10 DEVICE FOR SHUTTING A VACUUM AIRCRAFT CIRCUIT
PCT/FR2010/051429 WO2011004119A1 (en) 2009-07-10 2010-07-07 Device for closing fuel-dump circuit of an aircraft

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EP2451709A1 true EP2451709A1 (en) 2012-05-16

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EP10742213A Withdrawn EP2451709A1 (en) 2009-07-10 2010-07-07 Device for closing fuel-dump circuit of an aircraft

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EP (1) EP2451709A1 (en)
CN (1) CN102481982B (en)
CA (1) CA2767635C (en)
FR (1) FR2947807B1 (en)
RU (1) RU2012104669A (en)
WO (1) WO2011004119A1 (en)

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CN108397634B (en) * 2018-04-25 2024-04-19 上海德朗汽车散热器制造有限公司 Water detection choke plug for automobile radiator leakage detection
CN114165673B (en) * 2021-10-18 2024-04-16 上海贤日测控科技有限公司 Plug device

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FR2947807B1 (en) 2012-05-18
CA2767635C (en) 2017-08-08
US20120104173A1 (en) 2012-05-03
CN102481982B (en) 2015-07-22
CN102481982A (en) 2012-05-30
CA2767635A1 (en) 2011-01-13
FR2947807A1 (en) 2011-01-14
US8651143B2 (en) 2014-02-18
WO2011004119A1 (en) 2011-01-13
RU2012104669A (en) 2013-08-20

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