EP0349385A1 - Safety and arming system for a projectile using combustion gas pressure - Google Patents
Safety and arming system for a projectile using combustion gas pressure Download PDFInfo
- Publication number
- EP0349385A1 EP0349385A1 EP89401759A EP89401759A EP0349385A1 EP 0349385 A1 EP0349385 A1 EP 0349385A1 EP 89401759 A EP89401759 A EP 89401759A EP 89401759 A EP89401759 A EP 89401759A EP 0349385 A1 EP0349385 A1 EP 0349385A1
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- European Patent Office
- Prior art keywords
- piston
- partition
- projectile
- pressure
- housing
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- 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.)
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- 239000000567 combustion gas Substances 0.000 title abstract description 4
- 238000005192 partition Methods 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000003380 propellant Substances 0.000 claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010304 firing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
- F42C15/30—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids of propellant gases, i.e. derived from propulsive charge or rocket motor
Definitions
- the present invention relates to a device for causing the translation of a control member of a security and arming system for artillery projectiles, and more particularly for non-rotating projectiles or at low rotational speed such as those fired from smooth tubes.
- the technical field of the invention is that of security and arming systems using the pressure of the combustion gases of a propellant charge to cause unlocking.
- these very abrasive gases have a temperature of the order of 3000 ° C, under a pressure of up to 4.108 Pa
- the present invention provides an unlocking device by borrowing gas guaranteeing total tightness and a high level of security, simple to carry out therefore very inexpensive, being able moreover to adapt to more severe firing constraints.
- the subject of the invention is a device making it possible to cause the translation of a control member of a security and arming system of a projectile under the action of the pressure of the gases resulting from the combustion of a propellant charge, device comprising: at least one housing disposed at the rear part of the projectile and having its opening oriented so as to be subjected to gas pressure, the bottom of this housing being constituted by a watertight partition resistant to this pressure and the control member being at in the vicinity of the partition and isolated from the gases by the latter, a piston disposed in the housing and capable of translating therein under the action of the pressure of the gases, and comprising a part forming a punch capable of perforating the partition then of causing the translation of the control member.
- the piston will comprise at least two cylindrical parts, a first part whose diameter is substantially equal to that of a first bore of the housing and a second part whose diameter is less than that of the first part and forms the punch and a means between the piston and the safety and cocking system acting after perforation of the partition.
- the sealing means comprises a conical part of the piston coming to cooperate with the hole perforated by the latter in the partition.
- the sealing means comprises a third cylindrical part of the piston coming to cooperate with a second bore of the housing, coaxial with the first bore, so as to make a tight fit.
- the piston may carry at least one O-ring placed at the level of a cylindrical groove arranged on its lateral surface.
- the device will comprise at least three pistons regularly spaced angularly from each other relative to the axis of the projectile and coming to act on the control member, and the latter will consist of a ring having the same axis as the projectile.
- the projectile partially shown in Figure 1 is constituted by a body 1 containing the pyrotechnic charge 2 and secured to a tail 3 of light alloy.
- the projectile is introduced into a socket 16, crimped or glued to the tail 3, behind the joint plane between the body 1 and said tail 3 and containing a propellant charge not shown.
- a security and arming system 4 (hereinafter called SA), coaxial with the projectile and carrying a finger 5, making it possible to control an unlocking, and which is kept projecting by a cup 6.
- SA security and arming system 4
- the finger 5 and the cup 6 are positioned on the SA by means of an intermediate piece 7, which further comprises two countersinks 8, forming between them and with the finger 5 an angle of 120 ° relative to the axis of the projectile (a counterbore 8 is shown here diametrically opposite the finger 5).
- the counterbores 8 each receive a spacer 9 whose role, in cooperation with the finger 5, is to maintain a ring 10 perpendicular to the axis of the projectile, this ring 10 being itself centered on this axis by the intermediate piece 7 and its own accommodation in the tail section 3.
- the ring 10 thus constitutes a control member, the translation of which will cause the SA to be unlocked.
- the empennage 3 carries three identical housings 12, and regularly angularly spaced from one another relative to the axis of the projectile.
- Each housing is constituted by three coaxial cylindrical bores (13, 14, and 15) (see Figure 2) whose axis is perpendicular to the rear face 11 of the ring 10.
- the thickness of metal which separates the bottom of each housing from the ring 10 constitutes a partition 17, strictly sealed, the thickness of which is denoted e.
- Each housing receives a stepped piston 18 (see FIG. 2) this comprises a first cylindrical part 19, of diameter D, which has on its lateral surface two grooves 22 each receiving a seal 23.
- the piston 18 comprises a second cylindrical part 20, of diameter d, which engages with play in the third bore 15 of the housing 12, the bottom of this bore consists of the partition 17.
- a third cylindrical part 21 connected to the second by a chamfer 24 and located opposite the second bore 14 of the housing 12, of smaller diameter, the diameters of 21 and 14 are chosen from so as to obtain a tight fit over a sufficient length to ensure sealing.
- the seals 23 provide a seal during this movement (for pressures below 2.108 Pa.
- the second part 20 of diameter d will then exert on the partition 17 a stress proportional to the pressure of the gases and to the ratio of the sections of the first and second parts.
- This second part of the piston 18 thus acts as a punch which will pierce the partition 17, the thickness of the latter will be dimensioned so as to be able to be thus punched.
- the thickness e a value such that: S being the section of the first part 19 of the piston ( ⁇ .D2 / 4) d being the diameter of the second part 20 of the piston e being the thickness of the partition P being the pressure of the propellant gases ⁇ L being the breaking shear stress of the material constituting the partition. ⁇ .de represents the cylindrical lateral surface of the partition that is sheared.
- the second part of the piston then pushes the ring 10, which causes the cup 6 and the spacers 9 to shear, and causes the finger 5 to be pushed in and the SA to be unlocked for the first time.
- the third part 21 of the piston 18 engages in force in the second bore 14 and forms an irreversible connection which ensures a high pressure seal of the SA auz propellant gases.
- the seal is obtained if the length of the first part 20 of the piston 18 is less than the depth of the third bore 15 increased by the thickness e of the partition 17. In this case, the adjustment between the third part 21 of the piston 18 and the second bore 14 is made before the shearing of the partition is completed.
- the partition will also be dimensioned so that the pressure P of the gases exerted directly on it cannot break it.
- the gas pressure is around 3800 bars.
- the position of the finger 5 relative to the pistons 18 is indifferent, and an indexing of the SA relative to the pistons is unnecessary. It is therefore possible to use a simplified connection, for example by threading, between the body 1 and the tail 3.
- the device according to the invention can be used for an SA implanted in a gyrating projectile.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Jib Cranes (AREA)
- Burglar Alarm Systems (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Measuring Fluid Pressure (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Eye Examination Apparatus (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
La présente invention concerne un dispositif permettant de provoquer la translation d'un organe de commande d'un système de sécurité et d'armement pour projectiles d'artillerie, et plus particulièrement pour projectiles non girant ou à faible vitesse de rotation tels que ceux tirés à partir de tubes lisses.The present invention relates to a device for causing the translation of a control member of a security and arming system for artillery projectiles, and more particularly for non-rotating projectiles or at low rotational speed such as those fired from smooth tubes.
Le domaine technique de l'invention est celui des systèmes de sécurité et d'armement utilisant la pression des gaz de combustion d'une charge propulsive pour provoquer un déverrouillage.The technical field of the invention is that of security and arming systems using the pressure of the combustion gases of a propellant charge to cause unlocking.
Les réglementations en vigueur aujourd'hui dans la plupart des pays, et entre autres dans les pays de l'OTAN, imposent pour toutes les munitions d'artillerie un double déverrouillage au niveau du système de sécurité et d'armement, cela afin de garantir une sécurité maximale au cours du stockage et des manutentions.The regulations in force today in most countries, and in particular in NATO countries, impose for all artillery ammunition a double unlocking at the level of the security and armament system, this in order to guarantee maximum safety during storage and handling.
Dans le cas des projectiles tirés à partir des tubes rayés qui engendrent donc des vitesses de rotation élevées, le problème est en général résolu par l'utilisation des forces résultant de l'accélération pour obtenir un premier déverrouillage et de la force centrifuge pour le second.In the case of projectiles fired from striped tubes which therefore generate high rotational speeds, the problem is generally solved by the use of the forces resulting from the acceleration to obtain a first unlocking and of the centrifugal force for the second. .
Par contre lorsque l'on est en présence d'un projectile tiré par un tube lisse, il n'est plus possible d'utiliser la force centrifuge. Il paraît alors commode de recourir à un déverrouillage empruntant les gaz de la charge propulsive.On the other hand, when one is in the presence of a projectile fired by a smooth tube, it is no longer possible to use centrifugal force. It then seems convenient to resort to an unlocking using the gases of the propellant charge.
Or ces gas, très abrasifs, ont une température de l'ordre de 3000°C, sous une pression pouvant atteindre 4.10⁸ PaHowever, these very abrasive gases have a temperature of the order of 3000 ° C, under a pressure of up to 4.10⁸ Pa
On conçoit dans ces conditions qu'il soit difficile de réaliser une étanchéité du système qui permettre d'empêcher à coup sûr ces gaz de s'infiltrer à l'intérieur, de venir au contact de ses différents composants pyrotechniques et de provoquer une initiation prématurée de la charge principale, en début trajectoire, voire à l'intérieur du tube.It is therefore understandable that it is difficult to seal the system, which will certainly prevent these gases from infiltrating inside, coming into contact with its various pyrotechnic components and causing premature initiation. of the main load, at the start of the trajectory, or even inside the tube.
A cet effet, la présente invention propose un dispositif de déverrouillage par emprunt de gaz garantissant une étanchéité totale et un niveau de sécurité élevé, simple à réaliser donc très bon marché, pouvant en outre s'adapter à des contraintes de tir plus sévères.To this end, the present invention provides an unlocking device by borrowing gas guaranteeing total tightness and a high level of security, simple to carry out therefore very inexpensive, being able moreover to adapt to more severe firing constraints.
Ainsi l'invention a pour objet un dispositif permettant de provoquer la translation d'un organe de commande d'un système de sécurité et d'armement d'un projectile sous l'action de la pression des gaz résultant de la combustion d'une charge propulsive, dispositif comprenant:
au moins un logement disposé à la partie arrière du projectile et ayant son ouverture orientée de façon à être soumise à la pression des gaz, le fond de ce logement étant constitué par une cloison étanche résistant à cette pression et l'organe de commande étant au voisinage de la cloison et isolé des gaz par cette dernière,
un piston disposé dans le logement et pouvant se translater dans celui-ci sous l'action de la pression des gaz, et comportant une partie formant poinçon apte à perforer la cloison puis à provoquer la translation de l'organe de commande.Thus, the subject of the invention is a device making it possible to cause the translation of a control member of a security and arming system of a projectile under the action of the pressure of the gases resulting from the combustion of a propellant charge, device comprising:
at least one housing disposed at the rear part of the projectile and having its opening oriented so as to be subjected to gas pressure, the bottom of this housing being constituted by a watertight partition resistant to this pressure and the control member being at in the vicinity of the partition and isolated from the gases by the latter,
a piston disposed in the housing and capable of translating therein under the action of the pressure of the gases, and comprising a part forming a punch capable of perforating the partition then of causing the translation of the control member.
Préférentiellement le piston comportera au moins deux parties cylindriques, une première partie dont le diamètre est sensiblement égal à celui d'un premier alésage du logement et une deuxième partie dont le diamètre est inférieur à celui de la première partie et forme le poinçon et un moyen d'étanchéité entre le piston et le système de sécurité et d'armement agissant après perforation de la cloison.Preferably the piston will comprise at least two cylindrical parts, a first part whose diameter is substantially equal to that of a first bore of the housing and a second part whose diameter is less than that of the first part and forms the punch and a means between the piston and the safety and cocking system acting after perforation of the partition.
Selon un premier mode de réalisation, le moyen d'étanchéité comprend une partie conique du piston venant coopérer avec le trou perforé par ce dernier dans la cloison.According to a first embodiment, the sealing means comprises a conical part of the piston coming to cooperate with the hole perforated by the latter in the partition.
Selon un deuxième mode de réalisation, le moyen d'étanchéité comprend une troisième partie cylindrique du piston venant coopérer avec un deuxième alésage du logement, coaxial au premier alésage, de façon à réaliser un ajustement serré.According to a second embodiment, the sealing means comprises a third cylindrical part of the piston coming to cooperate with a second bore of the housing, coaxial with the first bore, so as to make a tight fit.
Le piston pourra porter au moins un joint torique disposé au niveau d'une gorge cyclindrique aménagée sur sa surface latérale.The piston may carry at least one O-ring placed at the level of a cylindrical groove arranged on its lateral surface.
Préferentiellement le dispositif comprendra au moins trois pistons régulièrement espacés angulairement les uns des autres relativement à l'axe du projectile et venant agir sur l'organe de commande, et ce dernier sera constitué par une bague ayant même axe que le projectile.Preferably, the device will comprise at least three pistons regularly spaced angularly from each other relative to the axis of the projectile and coming to act on the control member, and the latter will consist of a ring having the same axis as the projectile.
L'invention sera mieux comprise an vu de la description qui va suivre, faite au regard des dessins annexés, et dans lesquels:
- - la figure 1 est une vue partielle en coupe axiale d'un projectile équipé d'un dispositif selon l'invention,
- - la figure 2 est une vue de détail du dispositif selon l'invention.
- FIG. 1 is a partial view in axial section of a projectile equipped with a device according to the invention,
- - Figure 2 is a detail view of the device according to the invention.
Le projectile partiellement représenté à la figure 1 est constitué par un corps 1 contenant le chargement pyrotechnique 2 et solidaire d'un empennage 3 en alliage léger.The projectile partially shown in Figure 1 is constituted by a body 1 containing the
Le projectile est introduit dans une douille 16, sertie ou collée sur l'empennage 3, en arrière du plan de joint entre le corps 1 et ledit empennage 3 et contenant une charge propulsive non représentée.The projectile is introduced into a
Entre chargement et empennage vient s'insérer un système de sécurité et d'armement 4 (appelé par la suite SA), coaxial au projectile et porteur d'un doigt 5, permettant de commander un déverrouillage, et qui est maintenu en saillie par une coupelle 6. Le doigt 5 et la coupelle 6 sont positionnés sur le SA au moyen d'une pièce intermédiaire 7, laquelle comporte en outre deux lamages 8, formant entre eux et avec le doigt 5 un angle de 120° par rapport à l'axe du projectile (un lamage 8 est représenté ici diamètralement opposé au doigt 5).Between loading and empennage is inserted a security and arming system 4 (hereinafter called SA), coaxial with the projectile and carrying a
Les lamages 8 reçoivent chacun une entretoise 9 dont le rôle, en coopération avec le doigt 5, est de maintenir une bague 10 perpendiculaire à l'axe du projectile, cette bague 10 étant elle-même centrée sur cet axe par la pièce intermédiaire 7 et son propre logement dans l'empennage 3.The counterbores 8 each receive a
La bague 10 constitue ainsi un organe de commande, dont la translation va entraîner un déverrouillage du SA.The
L'empennage 3 porte trois logements 12 identiques, et régulièrement espacés angulairement les uns des autres relativement à l'axe du projectile.The
Chaque logement est constitué par trois alésages cylindriques coaxiaux (13, 14, et 15) (voir Figure 2) dont l'axe est perpendiculaire à la face arrière 11 de la bague 10.Each housing is constituted by three coaxial cylindrical bores (13, 14, and 15) (see Figure 2) whose axis is perpendicular to the
L'épaisseur de métal qui sépare le fond de chaque logement de la bague 10 constitue une cloison 17, rigoureusement étanche dont l'épaisseur est notée e.The thickness of metal which separates the bottom of each housing from the
Chaque logement reçoit un piston étagé 18 (voir Figure 2) celui-ci comprend une première partie cylindrique 19, de diamètre D, qui présente sur sa surface latérale deux gorges 22 recevant chacune un joint d'étanchéité 23. Le piston 18 comporte une seconde partie cylindrique 20, de diamètre d, qui vient s'engager avec jeu dans le troisième alésage 15 du logement 12, le fond de cet alésage est constitué par la cloison 17.Each housing receives a stepped piston 18 (see FIG. 2) this comprises a first
Entre ces première et deuxième parties du piston, se trouve une troisième partie cylindrique 21, raccordée à la seconde par un chanfrein 24 et située au regard du deuxième alésage 14 du logement 12, de diamètre inférieur, les diamètres de 21 et 14 sont choisis de manière à obtenir un ajustement serré sur une longueur suffisante pour assurer l'étanchéité.Between these first and second parts of the piston, there is a third
L'extraction du piston 18 est rendue impossible par la présence d'un pion d'arrêt 26.The extraction of the
Au départ du coup, les gaz de propulsion exercent sur la face 25 du piston 18 une pression P qui va provoquer sa translation.At the start of the blow, the propulsion gases exert on the
Les joints 23 réalisent une étanchéité au cours de ce mouvement (pour des pressions inférieures à 2.10⁸ Pa . La seconde partie 20 de diamètre d va ensuite exercer sur la cloison 17 une contrainte proportionnelle à la pression des gaz et au rapport des sections des première et deuxième parties.The
Cette seconde partie du piston 18 agit ainsi comme un poinçon qui va percer la cloison 17, l'épaisseur de cette dernière sera dimensionnée de façon à pouvoir être ainsi poinçonnée.This second part of the
Il suffira de donner à l'épaisseur e une valeur telle que:
d étant le diamètre de la deuxième partie 20 du piston
e étant l'épaisseur de la cloison
P étant la pression des gaz propulsifs
σL étant la contrainte de rupture au cisaillement du matériau constituant la cloison.
π.d.e représente la surface latérale cylindrique de la cloison que est cisaillée.It will suffice to give the thickness e a value such that:
d being the diameter of the
e being the thickness of the partition
P being the pressure of the propellant gases
σL being the breaking shear stress of the material constituting the partition.
π.de represents the cylindrical lateral surface of the partition that is sheared.
La deuxième partie du piston vient ensuite pousser la bague 10, ce qui provoque le cisaillement de la coupelle 6 et des entretoises 9, et entraîne l'enfoncement du doigt 5 et le premier déverrouillage du SA.The second part of the piston then pushes the
Au cours de cette même translation, la troisième partie 21 du piston 18 s'engage en force dans le deuxième alésage 14 et forme une liaison irréversible qui assure une étanchéité haute pression du SA auz gaz propulsifs.During this same translation, the
L'étanchéité est obtenue si la longeur de la première partie 20 du piston 18 est inférieure à la profondeur du troisième alésage 15 augmentée de l'épaisseur e de la cloison 17. Dans ce cas, l'ajustement entre la troisième partie 21 du piston 18 et le deuxième alésage 14 est effectué avant que le cisaillement de la cloison soit achevé.The seal is obtained if the length of the
Ainsi les gaz n'ont jamais la possibilité de pénétrer à l'intérieur du SA.Thus the gases never have the possibility of penetrating inside the SA.
On dimensionnera également la cloison de telle sorte que la pression P des gaz exercée directement sur elle ne puisse pas la rompre.The partition will also be dimensioned so that the pressure P of the gases exerted directly on it cannot break it.
Il suffira par exemple de choisir e de telle sorte que:
Cette relation est une approximation, la contrainte réelle que la pression des gaz exerce sur la cloison étant une composition de flexion et de cisaillement et la pression P se répartissant sur toute la surface de la cloison.This relationship is an approximation, the real stress that the gas pressure exerts on the partition being a bending and shearing composition and the pressure P being distributed over the entire surface of the partition.
On voit ainsi un des avantages de l'invention qui est d'assurer l'étanchéité absolue du SA et de l'interieur du projectile aux gaz de combustion même en cas de défaut d'étanchéité au niveau des joints 23, voire en cas d'absence totale de ces joints ou du piston lui-même.One thus sees one of the advantages of the invention which is to ensure the absolute sealing of the SA and the interior of the projectile to the combustion gases even in the event of a leakage at the level of the
Cependant quand les pistons sont mis en place il permettent, en provoquant la translation du doigt 5, un armement sûr et étanche du SA. On est ainsi très loin des systèmes d'armement traditionnels à emprunt de gaz qui nécessitent la mise en oeuvre de clapets complexes souvent détériorés par les gaz et qui n'assurent plus une étanchéité absolue après armement.However, when the pistons are put in place, they allow, by causing the
A titre d'exemple un projectile du type de celui de la figure 1 avec un empennage en alliage d'aluminium a été muni du dispositif selon l'invention constitué par :
Trois pistons à 120° diamètre D = 14 mm, diamètre d = 4 mm, épaisseur cloison e = 4 mm.
La pression des gaz est de l'ordre de 3800 bars.By way of example, a projectile of the type of that of FIG. 1 with a tail made of aluminum alloy has been provided with the device according to the invention constituted by:
Three pistons at 120 ° diameter D = 14 mm, diameter d = 4 mm, wall thickness e = 4 mm.
The gas pressure is around 3800 bars.
Aucune rupture des cloisons n'intervient en l'absence des pistons. Lorsque ces derniers sont disposés dans leurs logements respectifs, chacun d'eux exerce un effort de l'ordre de 2000 daN sur la cloison, effort qui provoque le cisaillement de cette dernière. La résultante de ces trois forces suivant l'axe du projectile s'exerce ensuite sur la bague 10 et provoque le cisaillement de la coupelle 6 et des entretoises 9 (dimensionnées pour n'exercer qu'une résistance de l'ordre d'une centaine de daN qui est suffisante pour assurer une tenue aux chocs et aux vibrations en cours de manutention ou de stockage).No rupture of the partitions occurs in the absence of the pistons. When the latter are arranged in their respective housings, each of them exerts a force of the order of 2000 daN on the partition, an effort which causes the latter to shear. The result of these three forces along the axis of the projectile is then exerted on the
Il est facile d'adapter le dispositif selon l'invention à des conditions de tir différentes en jouant sur les valeurs de D, d, et e, les surcoûts éventuels seront négligeables en raison de la grande simplicité du dispositif.It is easy to adapt the device according to the invention to different firing conditions by playing on the values of D, d, and e, the possible additional costs will be negligible due to the great simplicity of the device.
Il est possible également de prévoir un autre moyen d'étanchéité entre le piston et le système de sécurité et d'armement après perforation de la cloison, en remplaçant par exemple la troisième partie cylindrique 21 par une partie conique (conicité de l'ordre de 3°) entre les parties cylindriques 19 et 20 du piston, cette partie conique viendra coopérer avec le trou perforé par la partie 20 dans la cloison 17.It is also possible to provide another sealing means between the piston and the security and arming system after perforation of the partition, by replacing for example the third
Du point de vue de l'intégration du dispositif selon l'invention dans un projectile, on peut noter que:From the point of view of the integration of the device according to the invention in a projectile, it can be noted that:
Grâce à la bague intermédiaire 10, la position du doigt 5 par rapport aux pistons 18 est indifférente, et une indexation du SA relativement aux pistons est inutile. On peut donc recourir à une liaison simplifiée, par exemple par filetage, entre le corps 1 et l'empennage 3.Thanks to the
Il est possible de jouer sur l'inclinaison relative des pistons 18 et de la bague 10, ce qui offre de multiples possibilités d'implantation des pistons dans l'empennage 3.It is possible to play on the relative inclination of the
Enfin, on peut utiliser le dispositif selon l'invention pour un SA implanté dans un projectile girant.Finally, the device according to the invention can be used for an SA implanted in a gyrating projectile.
Claims (7)
au moins un logement (12) disposé à la partie arrière du projectile et ayant son ouverture orientée de façon à être soumise à la pression des gaz, le fond de ce logement étant constitué par une cloison étanche (17) résistant à cette pression et l'organe de command étant au voisinage de la cloison et isolé des gaz par cette dernière,
un piston (18) disposé dans le logement (12) et pouvant se translater dans celui-ci sous l'action de la pression des gaz, et comportant une partie formant poinçon apte à perforer la cloison (17) puis à provoquer la translation de l'organe de commande.1-Device making it possible to cause the translation of a control member of a security and arming system (4) of a projectile under the action of the pressure of the gases resulting from the combustion of a propellant charge, characterized in that it comprises:
at least one housing (12) disposed at the rear part of the projectile and having its opening oriented so as to be subjected to gas pressure, the bottom of this housing being constituted by a watertight partition (17) resistant to this pressure and the the control member being in the vicinity of the partition and isolated from the gases by the latter,
a piston (18) disposed in the housing (12) and able to translate therein under the action of the gas pressure, and comprising a part forming a punch capable of perforating the partition (17) and then causing the translation of the control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89401759T ATE85699T1 (en) | 1988-06-23 | 1989-06-22 | SAFETY AND ARMATURE SYSTEM FOR A PROJECTION USING COMBUSTION GAS PRESSURE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8808429 | 1988-06-23 | ||
| FR8808429A FR2633385B1 (en) | 1988-06-23 | 1988-06-23 | SECURITY AND ARMING SYSTEM FOR PROJECTILE USING COMBUSTION GAS PRESSURE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0349385A1 true EP0349385A1 (en) | 1990-01-03 |
| EP0349385B1 EP0349385B1 (en) | 1993-02-10 |
Family
ID=9367621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89401759A Expired - Lifetime EP0349385B1 (en) | 1988-06-23 | 1989-06-22 | Safety and arming system for a projectile using combustion gas pressure |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0349385B1 (en) |
| AT (1) | ATE85699T1 (en) |
| CA (1) | CA1335165C (en) |
| DE (1) | DE68904827T2 (en) |
| ES (1) | ES2039893T3 (en) |
| FR (1) | FR2633385B1 (en) |
| IL (1) | IL90736A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061385A (en) * | 2021-11-15 | 2022-02-18 | 河北迥然科技有限公司 | Fuse insurance relieving method and device and fuse insurance mechanism |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10026885B4 (en) * | 2000-05-30 | 2007-02-15 | Rheinmetall Waffe Munition Gmbh | From a gun fireable bullet with an acted upon by propellant gases, acting on a detonator activating device transmission element |
| EP1471326B1 (en) | 2003-04-26 | 2010-04-07 | Rheinmetall Waffe Munition GmbH | Electric switch for a projectile fuze, which switch is activated by gas pressure |
| DE10354012B4 (en) * | 2003-04-26 | 2005-06-30 | Rheinmetall W & M Gmbh | Gas pressure switch for an ignition and safety device of ammunition |
| FR3092660B1 (en) | 2019-02-13 | 2022-04-01 | Nexter Munitions | ROCKET FOR A PROJECTILE INTENDED TO BE FIRED BY A CANNON |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR22235E (en) * | 1917-05-01 | 1921-05-24 | Maison Philippe Monduit | Explosive projectile |
| US2145507A (en) * | 1936-12-31 | 1939-01-31 | Sageb Sa De Gestion Et De Expl | Percussion fuse for rocketprojectiles |
| US2704033A (en) * | 1951-10-09 | 1955-03-15 | Casper J Koeper | Rocket fuze |
| US2730046A (en) * | 1950-09-19 | 1956-01-10 | Bofors Ab | Safety device for the explosive head of a missile |
| FR2126703A5 (en) * | 1971-02-13 | 1972-10-06 | Rheinmetall Gmbh | |
| US3894490A (en) * | 1973-04-06 | 1975-07-15 | Us Army | Projectile fuze with unitary deformable detent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4730046A (en) * | 1986-04-14 | 1988-03-08 | Stauffer Chemical Company | Preparation of aryl halides |
-
1988
- 1988-06-23 FR FR8808429A patent/FR2633385B1/en not_active Expired - Lifetime
-
1989
- 1989-06-22 DE DE8989401759T patent/DE68904827T2/en not_active Expired - Fee Related
- 1989-06-22 ES ES198989401759T patent/ES2039893T3/en not_active Expired - Lifetime
- 1989-06-22 EP EP89401759A patent/EP0349385B1/en not_active Expired - Lifetime
- 1989-06-22 AT AT89401759T patent/ATE85699T1/en not_active IP Right Cessation
- 1989-06-22 CA CA000603612A patent/CA1335165C/en not_active Expired - Fee Related
- 1989-06-23 IL IL90736A patent/IL90736A/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR22235E (en) * | 1917-05-01 | 1921-05-24 | Maison Philippe Monduit | Explosive projectile |
| US2145507A (en) * | 1936-12-31 | 1939-01-31 | Sageb Sa De Gestion Et De Expl | Percussion fuse for rocketprojectiles |
| US2730046A (en) * | 1950-09-19 | 1956-01-10 | Bofors Ab | Safety device for the explosive head of a missile |
| US2704033A (en) * | 1951-10-09 | 1955-03-15 | Casper J Koeper | Rocket fuze |
| FR2126703A5 (en) * | 1971-02-13 | 1972-10-06 | Rheinmetall Gmbh | |
| US3894490A (en) * | 1973-04-06 | 1975-07-15 | Us Army | Projectile fuze with unitary deformable detent |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061385A (en) * | 2021-11-15 | 2022-02-18 | 河北迥然科技有限公司 | Fuse insurance relieving method and device and fuse insurance mechanism |
| CN114061385B (en) * | 2021-11-15 | 2023-11-10 | 河北迥然科技有限公司 | Fuse insurance releasing method and device and fuse insurance mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE85699T1 (en) | 1993-02-15 |
| CA1335165C (en) | 1995-04-11 |
| IL90736A0 (en) | 1990-01-18 |
| FR2633385B1 (en) | 1990-08-31 |
| DE68904827T2 (en) | 1993-07-08 |
| FR2633385A1 (en) | 1989-12-29 |
| EP0349385B1 (en) | 1993-02-10 |
| IL90736A (en) | 1992-06-21 |
| ES2039893T3 (en) | 1993-10-01 |
| DE68904827D1 (en) | 1993-03-25 |
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