EP3999802A1 - Ammunition having reduced sensitivity - Google Patents
Ammunition having reduced sensitivityInfo
- 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
Links
- 230000035945 sensitivity Effects 0.000 title claims abstract description 7
- 239000002360 explosive Substances 0.000 claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 11
- 230000037452 priming Effects 0.000 claims description 20
- 239000004033 plastic Substances 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 239000007769 metal material Substances 0.000 description 9
- 238000005474 detonation Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000000028 HMX Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- UZGLIIJVICEWHF-UHFFFAOYSA-N octogen Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)CN([N+]([O-])=O)C1 UZGLIIJVICEWHF-UHFFFAOYSA-N 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
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 |
Family
ID=69468610
Family Applications (1)
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)
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 |
-
2019
- 2019-07-15 FR FR1907906A patent/FR3098899B1/en active Active
-
2020
- 2020-07-09 WO PCT/FR2020/051229 patent/WO2021009444A1/en unknown
- 2020-07-09 EP EP20750337.6A patent/EP3999802B1/en active Active
- 2020-07-09 ES ES20750337T patent/ES2955807T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2021009444A1 (en) | 2021-01-21 |
EP3999802B1 (en) | 2023-06-28 |
ES2955807T3 (en) | 2023-12-07 |
FR3098899B1 (en) | 2023-04-21 |
FR3098899A1 (en) | 2021-01-22 |
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