EP3999802A1 - Ammunition having reduced sensitivity - Google Patents

Ammunition having reduced sensitivity

Info

Publication number
EP3999802A1
EP3999802A1 EP20750337.6A EP20750337A EP3999802A1 EP 3999802 A1 EP3999802 A1 EP 3999802A1 EP 20750337 A EP20750337 A EP 20750337A EP 3999802 A1 EP3999802 A1 EP 3999802A1
Authority
EP
European Patent Office
Prior art keywords
ammunition
bore
sleeve
stiffening element
charge
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
EP20750337.6A
Other languages
German (de)
French (fr)
Other versions
EP3999802B1 (en
Inventor
Pierre Brunet
Emmanuel BACLE
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.)
Eurenco France Sas
ArianeGroup SAS
Original Assignee
Eurenco SA
ArianeGroup SAS
Eurenco France SA
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 Eurenco SA, ArianeGroup SAS, Eurenco France SA filed Critical Eurenco SA
Publication of EP3999802A1 publication Critical patent/EP3999802A1/en
Application granted granted Critical
Publication of EP3999802B1 publication Critical patent/EP3999802B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
    • F42B39/14—Explosion or fire protection arrangements on packages or ammunition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
    • F42B39/20—Packages or ammunition having valves for pressure-equalising; Packages or ammunition having plugs for pressure release, e.g. meltable ; Blow-out panels; Venting arrangements

Definitions

  • the present invention relates to a reduced sensitivity munition.
  • a munition or military charge comprises a main explosive charge which is detonated directly or via a booster by a device or relay
  • a well or blind bore is made in the main load or booster to form a housing for the priming device.
  • the priming relay is placed in the well only when the ammunition is to be used, i.e. exploded. Therefore, during the time the ammunition is stored, the well is empty.
  • the ammunition can be struck by projectiles such as bullets or heavy shrapnel. If the empty well is in the trajectory of the projectile, the latter can seriously damage the ammunition and lead in particular to a collapse of the well, to significant mechanical damage to the main charge or the booster and to a shock between the walls. opposites of the well. This damage to the well is likely to cause a violent pyrotechnic reaction of the munition.
  • the invention aims to provide a munition with improved impact resistance at the housing reserved for the priming device.
  • a reduced-sensitivity munition comprising an explosive charge, the explosive charge comprising a blind cylindrical bore intended to receive at least one priming device, characterized in that it further comprises a stiffening element in contact. with the internal surface of the bore.
  • the ammunition according to the invention has a greatly enhanced impact resistance at the level of the blind cylindrical bore when the latter is in position. storage configuration, that is, when it is not occupied by a boot device. The risks of pyrotechnic reaction of the explosive charge are thus very significantly reduced.
  • the stiffening element is a sleeve, the outer surface of which is in contact with the inner surface of the bore.
  • the sleeve can be made of a metallic material.
  • the stiffening element is a solid cylinder having a volume corresponding to the volume of the bore.
  • the full cylinder may be of plastic material.
  • the object of the invention is also achieved with a low-sensitivity munition comprising a main explosive charge and a secondary initiation charge surrounded by the main explosive charge, the secondary initiation charge comprising a blind cylindrical bore intended to receive at least a starting device, characterized in that it further comprises a stiffening element in contact with the internal surface of the bore.
  • the ammunition according to the invention has a greatly enhanced impact resistance at the level of the blind cylindrical bore when the latter is in the storage configuration, that is to say when it is not occupied. by a priming device.
  • the risks of a pyrotechnic reaction from the primer charge are thus very significantly reduced.
  • the stiffening element is a sleeve, the outer surface of which is in contact with the inner surface of the bore.
  • the sleeve can be made of a metallic material.
  • the stiffening element is a solid cylinder having a volume corresponding to the volume of the bore.
  • the full cylinder may be of plastic material.
  • Figure 1 is a partial schematic longitudinal section of a rear part of a reduced sensitivity ammunition according to one embodiment of the invention
  • Figure 2 is a schematic sectional view showing a sleeve provided with stiffening elements
  • Figure 3 is a partial schematic longitudinal section of a rear part of a reduced sensitivity ammunition according to another embodiment of the invention.
  • the invention applies generally to any munition comprising a well or blind cylindrical bore which is usually empty during the storage phase of the munition.
  • Figure 1 shows in partial longitudinal section the rear part of a 100 ammunition which is a so-called "Reduced Vulnerability General Use” bomb.
  • This ammunition is
  • an envelope or body 1 10 containing an explosive charge 120 such as for example the composition PXBN-109 (explosive with a PHHT binder containing 20% aluminum, 64% RDX (1, 3, 5-trinitro- 1, 3, 5-triazacyclohexane) and 16% binder containing PHHT), DOA
  • an explosive charge 120 such as for example the composition PXBN-109 (explosive with a PHHT binder containing 20% aluminum, 64% RDX (1, 3, 5-trinitro- 1, 3, 5-triazacyclohexane) and 16% binder containing PHHT), DOA
  • the PBXN-109 has a detonation speed of 7600 m / s.
  • the envelope 1 10 has an opening 1 1 1 cooperating with an opening 121 of the explosive charge.
  • a blind cylindrical bore or well 130 is present in the explosive charge 120 and opens to the outside at the level of the openings 121 and 1 1 1.
  • the blind cylindrical bore 130 is intended to receive a priming device or suitable detonation relay. to initiate on
  • a thin metal sheath 115 is present on the exposed surface of charge 120 at bore 130.
  • the ammunition 100 is shown in Figure 1 in its storage configuration, that is to say when the priming device is not present in the bore 130. Still in accordance with the invention, in its storage configuration, that is to say when the priming device is not present in the bore 130. Still in accordance with the invention, in its storage configuration, that is to say when the priming device is not present in the bore 130. Still in accordance with the invention, in its storage configuration, that is to say when the priming device is not present in the bore 130. Still in accordance with the invention, in its
  • the ammunition 100 comprises a stiffening element 140 in contact with the internal surface 130b of the blind cylindrical bore 130.
  • the stiffening element 140 corresponds here to a sleeve 141 whose external surface 141a is in contact with the internal surface 130b of the bore 130.
  • the sleeve 141 is preferably made of a metallic material such as, for example, SAE 4340 alloy steel.
  • the sleeve 141 of metallic material preferably has a wall thickness E 14I greater than or equal to 6.5 mm. In general, the minimum thickness of the wall of the sleeve is determined by calculating the mechanical resistance necessary to impart to the blind cylindrical bore as a function of a determined impact force.
  • the sleeve can be totally hollow like the sleeve 141 or be
  • FIG 2 shows a sleeve 151 of metallic material which comprises in its internal volume stiffening elements 152 each extending between two diametrically opposed points of the internal surface 151b of the sleeve. This increases the crushing resistance of the sleeve, which allows
  • the stiffening element of the invention may consist of a solid cylinder.
  • the stiffening element can be made of plastic, which makes it possible to lighten its mass compared to a metallic material.
  • the stiffening element of the invention can consist of both a hollow sleeve, for example made of metallic material and of a solid cylinder, for example made of plastic material housed at the inside the sleeve.
  • Figure 3 shows a partial longitudinal section of the rear part of a 200 ammunition which is a so-called "Reduced Vulnerability General Use” bomb.
  • Ammunition 200 differs from Ammunition 100 already described in that it further includes a secondary priming charge.
  • the munition 200 comprises an envelope or body 210 containing a main explosive charge 220, for example a composite explosive based on oxynitrotriazole, and a secondary priming charge or booster 260 consisting for example of an explosive based on 'octogen.
  • Secondary boot charge 210 is surrounded by the main explosive charge 220.
  • the casing 210 has an opening 21 1 cooperating with an opening 261 of the secondary priming charge 260.
  • a blind cylindrical bore or well 230 is present in the secondary priming charge 260 and opens to the outside at the level of the openings 261. and 21 1.
  • the blind cylindrical bore 230 is intended to receive a priming device or detonation relay capable of initiating the priming charge 260 on command.
  • a thin metal sheath 215 is present on the exposed surface of the charge.
  • secondary priming 260 at the bore 130.
  • the munition 200 shown in FIG. 3 in its storage configuration, that is to say when the priming device is not present in the bore 230, comprises a stiffening element 240 in contact with the internal surface 230b of the blind cylindrical bore 230.
  • the stiffening element 240 corresponds to a solid cylinder 241 whose external surface 241 a is in contact with the internal surface 230b of the bore 230 .
  • the sleeve 241 is preferably made of plastic material such as for example high density polyethylene (HDPE).
  • HDPE high density polyethylene
  • the stiffening element of the invention can consist of a hollow sleeve such as the sleeve 141 described
  • the sleeve is preferably made of a metallic material.
  • the sleeve may be completely hollow or possibly be provided with additional stiffening elements such as the stiffening elements 152 of the sleeve 151 illustrated in FIG. 2. This increases the resistance to crushing of the sleeve, which optionally makes it possible to reduce the pressure. thickness of the sleeve wall.
  • the stiffening element of the invention can consist of both a hollow sleeve, for example made of metallic material and of a solid cylinder, for example made of plastic material housed in the inside the sleeve.
  • the stiffening element is removable in order to allow its replacement by a priming device when the ammunition is used.
  • the placement and removal of the stiffening element is facilitated by the presence of a thin metal sheath on the exposed surface of the single load or secondary priming load as described above.
  • the blind cylindrical bore or well intended to receive the priming device is made coaxially with the load.
  • the blind cylindrical bore can nevertheless be produced in other orientations such as for example orthogonal to the axis of the load.
  • the blind cylindrical bore is present at the rear base of the ammunition. This can also be present at the front part or front bottom of the ammunition.

Abstract

The invention relates to an ammunition having reduced sensitivity (100), which comprises an explosive charge (120). The explosive charge has a blind cylindrical bore (130) for receiving at least one primer-ignition device. The ammunition further comprises a stiffening element (140) which is in contact with the inner surface (130b) of the bore (130). The stiffening element is a solid cylinder having a volume corresponding to the volume of the bore.

Description

Description Description
Titre de l'invention : Munition à sensibilité réduite Title of the invention: Ammunition with reduced sensitivity
Domaine Technique Technical area
La présente invention concerne une munition à sensibilité réduite. The present invention relates to a reduced sensitivity munition.
Technique antérieure Prior art
Une munition ou charge militaire comprend un chargement explosif principal qui est mis en détonation directement ou via un booster par un dispositif ou relais A munition or military charge comprises a main explosive charge which is detonated directly or via a booster by a device or relay
d’amorçage. Un puits ou alésage borgne est réalisé dans le chargement principal ou le booster afin de former un logement pour le dispositif d’amorçage. priming. A well or blind bore is made in the main load or booster to form a housing for the priming device.
Le relais d’amorçage est placé dans le puits uniquement lorsque la munition doit être utilisée, c’est-à-dire explosée. Par conséquent, durant tout le temps où la munition est stockée, le puits est vide. The priming relay is placed in the well only when the ammunition is to be used, i.e. exploded. Therefore, during the time the ammunition is stored, the well is empty.
Pendant sa période de stockage, la munition peut être frappée par des projectiles tels que des balles ou des éclats lourds. Si le puits vide se trouve sur la trajectoire du projectile, ce dernier peut endommager de façon importante la munition et conduire en particulier à un effondrement du puits, à des dommages mécaniques importants sur le chargement principal ou le booster et à un choc entre les parois opposées du puits. Ces endommagements au niveau du puits sont susceptibles d’entraîner une réaction pyrotechnique violente de la munition. During its storage period, the ammunition can be struck by projectiles such as bullets or heavy shrapnel. If the empty well is in the trajectory of the projectile, the latter can seriously damage the ammunition and lead in particular to a collapse of the well, to significant mechanical damage to the main charge or the booster and to a shock between the walls. opposites of the well. This damage to the well is likely to cause a violent pyrotechnic reaction of the munition.
Exposé de l’invention Disclosure of the invention
L’invention a pour but de proposer une munition présentant une résistance à l’impact améliorée au niveau du logement réservé pour le dispositif d’amorçage. The invention aims to provide a munition with improved impact resistance at the housing reserved for the priming device.
Ce but est atteint notamment grâce à une munition à sensibilité réduite comprenant un chargement explosif, le chargement explosif comportant un alésage cylindrique borgne destiné à recevoir au moins un dispositif d’amorçage, caractérisée en ce qu’elle comprend en outre un élément raidisseur en contact avec la surface interne de l’alésage. This object is achieved in particular by virtue of a reduced-sensitivity munition comprising an explosive charge, the explosive charge comprising a blind cylindrical bore intended to receive at least one priming device, characterized in that it further comprises a stiffening element in contact. with the internal surface of the bore.
Ainsi, la munition selon l’invention présente une résistance à l’impact grandement renforcée au niveau de l’alésage cylindrique borgne lorsque celui-ci est en configuration de stockage, c’est-à-dire lorsqu’il n’est pas occupé par un dispositif d’amorçage. On réduit ainsi de manière très significative les risques de réaction pyrotechnique du chargement explosif. Thus, the ammunition according to the invention has a greatly enhanced impact resistance at the level of the blind cylindrical bore when the latter is in position. storage configuration, that is, when it is not occupied by a boot device. The risks of pyrotechnic reaction of the explosive charge are thus very significantly reduced.
Selon une caractéristique particulière de l’invention, l’élément raidisseur est un manchon dont la surface externe est en contact avec la surface interne de l’alésage. Le manchon peut être en matériau métallique. According to a particular characteristic of the invention, the stiffening element is a sleeve, the outer surface of which is in contact with the inner surface of the bore. The sleeve can be made of a metallic material.
Selon une autre caractéristique particulière, l’élément raidisseur est un cylindre plein présentant un volume correspondant au volume de l’alésage. Le cylindre plein peut être en matériau plastique. According to another particular characteristic, the stiffening element is a solid cylinder having a volume corresponding to the volume of the bore. The full cylinder may be of plastic material.
Le but de l’invention est également atteint avec une munition à sensibilité réduite comprenant un chargement explosif principal et un chargement d’amorçage secondaire entouré par le chargement explosif principal, le chargement d’amorçage secondaire comportant un alésage cylindrique borgne destiné à recevoir au moins un dispositif d’amorçage, caractérisée en ce qu’elle comprend en outre un élément raidisseur en contact avec la surface interne de l’alésage. The object of the invention is also achieved with a low-sensitivity munition comprising a main explosive charge and a secondary initiation charge surrounded by the main explosive charge, the secondary initiation charge comprising a blind cylindrical bore intended to receive at least a starting device, characterized in that it further comprises a stiffening element in contact with the internal surface of the bore.
Ainsi, la munition selon l’invention présente une résistance à l’impact grandement renforcée au niveau de l’alésage cylindrique borgne lorsque celui-ci est en configuration de stockage, c’est-à-dire lorsqu’il n’est pas occupé par un dispositif d’amorçage. On réduit ainsi de manière très significative les risques de réaction pyrotechnique du chargement d’amorçage. Thus, the ammunition according to the invention has a greatly enhanced impact resistance at the level of the blind cylindrical bore when the latter is in the storage configuration, that is to say when it is not occupied. by a priming device. The risks of a pyrotechnic reaction from the primer charge are thus very significantly reduced.
Selon une caractéristique particulière de l’invention, l’élément raidisseur est un manchon dont la surface externe est en contact avec la surface interne de l’alésage. Le manchon peut être en matériau métallique. According to a particular characteristic of the invention, the stiffening element is a sleeve, the outer surface of which is in contact with the inner surface of the bore. The sleeve can be made of a metallic material.
Selon une autre caractéristique particulière, l’élément raidisseur est un cylindre plein présentant un volume correspondant au volume de l’alésage. Le cylindre plein peut être en matériau plastique. According to another particular characteristic, the stiffening element is a solid cylinder having a volume corresponding to the volume of the bore. The full cylinder may be of plastic material.
Brève description des dessins Brief description of the drawings
[Fig. 1 ] La figure 1 est une coupe longitudinale schématique partielle d'une partie arrière d'une munition à sensibilité réduite selon un mode de réalisation de l'invention, [Fig. 2] La figure 2 est une vue schématique en coupe montrant un manchon muni d’éléments de rigidification, [Fig. 1] Figure 1 is a partial schematic longitudinal section of a rear part of a reduced sensitivity ammunition according to one embodiment of the invention, [Fig. 2] Figure 2 is a schematic sectional view showing a sleeve provided with stiffening elements,
[Fig. 3] La figure 3 est une coupe longitudinale schématique partielle d'une partie arrière d’une munition à sensibilité réduite selon un autre mode de réalisation de l'invention. [Fig. 3] Figure 3 is a partial schematic longitudinal section of a rear part of a reduced sensitivity ammunition according to another embodiment of the invention.
Description des modes de réalisation Description of embodiments
L'invention s'applique d'une manière générale à toute munition comportant un puits ou alésage cylindrique borgne qui est habituellement vide lors de la phase de stockage de la munition. The invention applies generally to any munition comprising a well or blind cylindrical bore which is usually empty during the storage phase of the munition.
La figure 1 montre en coupe longitudinale partielle la partie arrière d'une munition 100 qui est une bombe dite « d’Emploi Général à Vulnérabilité Réduite » Figure 1 shows in partial longitudinal section the rear part of a 100 ammunition which is a so-called "Reduced Vulnerability General Use" bomb.
conformément à un mode de réalisation de l’invention. Cette munition est in accordance with one embodiment of the invention. This ammunition is
représentée ici de façon schématique. Elle comporte une enveloppe ou corps 1 10 renfermant un chargement explosif 120 comme par exemple la composition PXBN- 109 (explosif à liant PHHT contenant 20% d’aluminium, 64% de RDX (1 , 3, 5-trinitro- 1 , 3,5-triazacyclohexane) et 16% de liant contenant du PHHT), du DOA shown here schematically. It comprises an envelope or body 1 10 containing an explosive charge 120 such as for example the composition PXBN-109 (explosive with a PHHT binder containing 20% aluminum, 64% RDX (1, 3, 5-trinitro- 1, 3, 5-triazacyclohexane) and 16% binder containing PHHT), DOA
(dioctyladipate), ou de l’IPDI (isophorone diisocyanate). La PBXN-109 a une vitesse de détonation de 7600 m/s. L’enveloppe 1 10 présente une ouverture 1 1 1 coopérant avec une ouverture 121 du chargement explosif. Un alésage cylindrique borgne ou puits 130 est présent dans le chargement explosif 120 et débouche à l’extérieur au niveau des ouvertures 121 et 1 1 1. L’alésage cylindrique borgne 130 est destiné à recevoir un dispositif d’amorçage ou relais de détonation apte à initier sur (dioctyladipate), or IPDI (isophorone diisocyanate). The PBXN-109 has a detonation speed of 7600 m / s. The envelope 1 10 has an opening 1 1 1 cooperating with an opening 121 of the explosive charge. A blind cylindrical bore or well 130 is present in the explosive charge 120 and opens to the outside at the level of the openings 121 and 1 1 1. The blind cylindrical bore 130 is intended to receive a priming device or suitable detonation relay. to initiate on
commande le chargement explosif 120. Une gaine métallique de faible épaisseur 1 15 est présente sur la surface exposée du chargement 120 au niveau de l’alésage 130. controls explosive charge 120. A thin metal sheath 115 is present on the exposed surface of charge 120 at bore 130.
Conformément à l’invention, la munition 100 est représentée sur la figure 1 dans sa configuration de stockage, c’est-à-dire lorsque le dispositif d’amorçage n’est pas présent dans l’alésage 130. Toujours conformément à l’invention, dans sa According to the invention, the ammunition 100 is shown in Figure 1 in its storage configuration, that is to say when the priming device is not present in the bore 130. Still in accordance with the invention, in its
configuration de stockage, la munition 100 comprend un élément raidisseur 140 en contact avec la surface interne 130b de l’alésage cylindrique borgne 130. Sur la figure 1 , l’élément raidisseur 140 correspond ici à un manchon 141 dont la surface externe 141 a est en contact avec la surface interne 130b de l’alésage 130. Le manchon 141 est réalisé de préférence en matériau métallique comme par exemple l’acier allié SAE 4340 . A titre d’exemple, le manchon 141 en matériau métallique présente de préférence une épaisseur de paroi E14I supérieure ou égale à 6,5 mm. D’une manière générale, l’épaisseur minimale de la paroi du manchon est déterminée par calcul de la résistance mécanique nécessaire à conférer à l’alésage cylindrique borgne en fonction d’une force d’impact déterminée. storage configuration, the ammunition 100 comprises a stiffening element 140 in contact with the internal surface 130b of the blind cylindrical bore 130. In FIG. 1, the stiffening element 140 corresponds here to a sleeve 141 whose external surface 141a is in contact with the internal surface 130b of the bore 130. The sleeve 141 is preferably made of a metallic material such as, for example, SAE 4340 alloy steel. By way of example, the sleeve 141 of metallic material preferably has a wall thickness E 14I greater than or equal to 6.5 mm. In general, the minimum thickness of the wall of the sleeve is determined by calculating the mechanical resistance necessary to impart to the blind cylindrical bore as a function of a determined impact force.
Le manchon peut être totalement creux comme le manchon 141 ou être The sleeve can be totally hollow like the sleeve 141 or be
éventuellement muni d’éléments supplémentaires de rigidification comme sur la figure 2 qui montre un manchon 151 en matériau métallique qui comprend dans son volume interne des éléments de rigidification 152 s’étendant chacun entre deux points diamétralement opposés de la surface interne 151 b du manchon. On augmente ainsi la résistance à l’écrasement du manchon, ce qui permet optionally provided with additional stiffening elements as in Figure 2 which shows a sleeve 151 of metallic material which comprises in its internal volume stiffening elements 152 each extending between two diametrically opposed points of the internal surface 151b of the sleeve. This increases the crushing resistance of the sleeve, which allows
éventuellement de diminuer l’épaisseur de la paroi du manchon. possibly reduce the thickness of the wall of the sleeve.
Selon un autre mode de réalisation de l’élément raidisseur de l’invention, celui-ci peut être constitué d’un cylindre plein. Dans ce cas, l’élément raidisseur peut être réalisé en plastique, ce qui permet d’alléger sa masse par rapport à un matériau métallique. According to another embodiment of the stiffening element of the invention, the latter may consist of a solid cylinder. In this case, the stiffening element can be made of plastic, which makes it possible to lighten its mass compared to a metallic material.
Selon encore un autre mode de réalisation de l’élément raidisseur de l’invention, celui-ci peut être constitué à la fois d’un manchon creux par exemple en matériau métallique et d’un cylindre plein par exemple en matériau plastique logé à l’intérieur du manchon. According to yet another embodiment of the stiffening element of the invention, the latter can consist of both a hollow sleeve, for example made of metallic material and of a solid cylinder, for example made of plastic material housed at the inside the sleeve.
La figure 3 montre en coupe longitudinale partielle la partie arrière d'une munition 200 qui est une bombe dite « d’Emploi Général à Vulnérabilité Réduite » Figure 3 shows a partial longitudinal section of the rear part of a 200 ammunition which is a so-called "Reduced Vulnerability General Use" bomb.
conformément à un autre mode de réalisation de l’invention. La munition 200 diffère de la munition 100 déjà décrite en ce qu’elle comprend en outre un chargement d’amorçage secondaire. in accordance with another embodiment of the invention. Ammunition 200 differs from Ammunition 100 already described in that it further includes a secondary priming charge.
Plus précisément, la munition 200 comporte une enveloppe ou corps 210 renfermant un chargement explosif principal 220, par exemple un explosif composite à base d’oxynitrotriazole, et un chargement d’amorçage secondaire ou booster 260 constitué par exemple d’un explosif à base d’octogène. Chargement d’amorçage secondaire 210 est entouré par le chargement explosif principal 220. L’enveloppe 210 présente une ouverture 21 1 coopérant avec une ouverture 261 du chargement d’amorçage secondaire 260. Un alésage cylindrique borgne ou puits 230 est présent dans le chargement d’amorçage secondaire 260 et débouche à l’extérieur au niveau des ouvertures 261 et 21 1. L’alésage cylindrique borgne 230 est destiné à recevoir un dispositif d’amorçage ou relais de détonation apte à initier sur commande le chargement d’amorçage 260. Une gaine métallique de faible épaisseur 215 est présente sur la surface exposée du chargement d’amorçage secondaire 260 au niveau de l’alésage 130. More specifically, the munition 200 comprises an envelope or body 210 containing a main explosive charge 220, for example a composite explosive based on oxynitrotriazole, and a secondary priming charge or booster 260 consisting for example of an explosive based on 'octogen. Secondary boot charge 210 is surrounded by the main explosive charge 220. The casing 210 has an opening 21 1 cooperating with an opening 261 of the secondary priming charge 260. A blind cylindrical bore or well 230 is present in the secondary priming charge 260 and opens to the outside at the level of the openings 261. and 21 1. The blind cylindrical bore 230 is intended to receive a priming device or detonation relay capable of initiating the priming charge 260 on command. A thin metal sheath 215 is present on the exposed surface of the charge. secondary priming 260 at the bore 130.
Conformément à l’invention, la munition 200, représentée sur la figure 3 dans sa configuration de stockage, c’est-à-dire lorsque le dispositif d’amorçage n’est pas présent dans l’alésage 230, comprend un élément raidisseur 240 en contact avec la surface interne 230b de l’alésage cylindrique borgne 230. Sur la figure 3, l’élément raidisseur 240 correspond à un cylindre plein 241 dont la surface externe 241 a est en contact avec la surface interne 230b de l’alésage 230. According to the invention, the munition 200, shown in FIG. 3 in its storage configuration, that is to say when the priming device is not present in the bore 230, comprises a stiffening element 240 in contact with the internal surface 230b of the blind cylindrical bore 230. In FIG. 3, the stiffening element 240 corresponds to a solid cylinder 241 whose external surface 241 a is in contact with the internal surface 230b of the bore 230 .
Le manchon 241 est réalisé de préférence en matériau plastique comme par exemple de polyéthylène haute densité (PEHD). The sleeve 241 is preferably made of plastic material such as for example high density polyethylene (HDPE).
Selon un autre mode de réalisation de l’élément raidisseur de l’invention, celui-ci peut être constitué d’un manchon creux comme le manchon 141 décrit According to another embodiment of the stiffening element of the invention, it can consist of a hollow sleeve such as the sleeve 141 described
précédemment. Dans ce cas, le manchon est de préférence réalisé en matériau métallique. Le manchon peut être totalement creux ou être éventuellement muni d’éléments supplémentaires de rigidification comme les éléments de rigidification 152 du manchon 151 illustré sur la figure 2. On augmente ainsi la résistance à l’écrasement du manchon, ce qui permet éventuellement de diminuer l’épaisseur de la paroi du manchon. previously. In this case, the sleeve is preferably made of a metallic material. The sleeve may be completely hollow or possibly be provided with additional stiffening elements such as the stiffening elements 152 of the sleeve 151 illustrated in FIG. 2. This increases the resistance to crushing of the sleeve, which optionally makes it possible to reduce the pressure. thickness of the sleeve wall.
Selon encore un autre mode de réalisation de l’élément raidisseur de l’invention, celui-ci peut être constitué à la fois d’un manchon creux par exemple en matériau métallique et d’un cylindre plein par exemple en matériau plastique logé à l’intérieur du manchon. According to yet another embodiment of the stiffening element of the invention, the latter can consist of both a hollow sleeve, for example made of metallic material and of a solid cylinder, for example made of plastic material housed in the inside the sleeve.
Dans tous les cas, l’élément raidisseur est amovible afin de permettre son remplacement par un dispositif d’amorçage lors de l’utilisation de la munition. Le placement et le retrait de l’élément raidisseur sont facilités par la présence d’une gaine métallique de faible épaisseur sur la surface exposée du chargement unique ou du chargement secondaire d’amorçage comme décrit ci-avant. In all cases, the stiffening element is removable in order to allow its replacement by a priming device when the ammunition is used. The placement and removal of the stiffening element is facilitated by the presence of a thin metal sheath on the exposed surface of the single load or secondary priming load as described above.
Dans les munitions décrites précédemment, l’alésage cylindrique borgne ou puits destiné à recevoir le dispositif d’amorçage est réalisé de manière coaxiale par rapport au chargement. L’alésage cylindrique borgne peut néanmoins être réalisé suivant d’autres orientations comme par exemple de manière orthogonale par rapport à l’axe du chargement. In the ammunition described above, the blind cylindrical bore or well intended to receive the priming device is made coaxially with the load. The blind cylindrical bore can nevertheless be produced in other orientations such as for example orthogonal to the axis of the load.
De même, dans les réalisations décrites ci-avant, l’alésage cylindrique borgne est présent au niveau du fond arrière de la munition. Celui-ci peut être également présent au niveau de la partie avant ou fond avant de la munition. Likewise, in the embodiments described above, the blind cylindrical bore is present at the rear base of the ammunition. This can also be present at the front part or front bottom of the ammunition.

Claims

Revendications Claims
Munition à sensibilité réduite (100) comprenant un chargement explosif (120), le chargement explosif comportant un alésage cylindrique borgne (130) destiné à recevoir au moins un dispositif d'amorçage, la munition comprenant en outre un élément raidisseur (140) en contact avec la surface interne (130b) de l'alésage (130), caractérisée en ce que l'élément raidisseur est un cylindre plein présentant un volume correspondant au volume de l'alésage. A low-sensitivity ammunition (100) comprising an explosive charge (120), the explosive charge comprising a blind cylindrical bore (130) for receiving at least one primer, the munition further comprising a stiffening member (140) in contact with the internal surface (130b) of the bore (130), characterized in that the stiffening element is a solid cylinder having a volume corresponding to the volume of the bore.
Munition selon la revendication 1, dans laquelle le cylindre plein est en matériau plastique. Ammunition according to claim 1, in which the solid cylinder is of plastic material.
Munition à sensibilité réduite (200) comprenant un chargement explosif principal (220) et un chargement d'amorçage secondaire (260) entouré par le chargement explosif principal, le chargement d'amorçage secondaire Reduced sensitivity ammunition (200) comprising a primary explosive charge (220) and a secondary initiation charge (260) surrounded by the primary explosive charge, the secondary initiation charge
comportant un alésage cylindrique borgne (230) destiné à recevoir au moins un dispositif d'amorçage, la munition comprenant en outre un élément raidisseur (240) en contact avec la surface interne (230b) de l'alésage (230), caractérisée en ce que l'élément raidisseur (240) est un cylindre plein (241) présentant un volume correspondant au volume de l'alésage. comprising a blind cylindrical bore (230) intended to receive at least one priming device, the ammunition further comprising a stiffening element (240) in contact with the internal surface (230b) of the bore (230), characterized in that that the stiffening element (240) is a solid cylinder (241) having a volume corresponding to the volume of the bore.
Munition selon la revendication 3, dans laquelle le cylindre plein (241) est en matériau plastique. Ammunition according to claim 3, in which the solid cylinder (241) is of plastic material.
EP20750337.6A 2019-07-15 2020-07-09 Ammunition having reduced sensitivity Active EP3999802B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1907906A FR3098899B1 (en) 2019-07-15 2019-07-15 Reduced Sensitivity Ammunition
PCT/FR2020/051229 WO2021009444A1 (en) 2019-07-15 2020-07-09 Ammunition having reduced sensitivity

Publications (2)

Publication Number Publication Date
EP3999802A1 true EP3999802A1 (en) 2022-05-25
EP3999802B1 EP3999802B1 (en) 2023-06-28

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Application Number Title Priority Date Filing Date
EP20750337.6A Active EP3999802B1 (en) 2019-07-15 2020-07-09 Ammunition having reduced sensitivity

Country Status (4)

Country Link
EP (1) EP3999802B1 (en)
ES (1) ES2955807T3 (en)
FR (1) FR3098899B1 (en)
WO (1) WO2021009444A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1253957A (en) * 1960-01-08 1961-02-17 Soc Tech De Rech Ind Improvements in explosive devices
SE468687B (en) * 1991-06-18 1993-03-01 Bofors Ab SETTING AND DEVICE FOR SEALING THE EXPLOSION SPACE IN A GRANATE
US6523477B1 (en) * 1999-03-30 2003-02-25 Lockheed Martin Corporation Enhanced performance insensitive penetrator warhead

Also Published As

Publication number Publication date
FR3098899B1 (en) 2023-04-21
WO2021009444A1 (en) 2021-01-21
EP3999802B1 (en) 2023-06-28
FR3098899A1 (en) 2021-01-22
ES2955807T3 (en) 2023-12-07

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