EP0594482B1 - Treibladungsbehälter - Google Patents

Treibladungsbehälter Download PDF

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Publication number
EP0594482B1
EP0594482B1 EP93402536A EP93402536A EP0594482B1 EP 0594482 B1 EP0594482 B1 EP 0594482B1 EP 93402536 A EP93402536 A EP 93402536A EP 93402536 A EP93402536 A EP 93402536A EP 0594482 B1 EP0594482 B1 EP 0594482B1
Authority
EP
European Patent Office
Prior art keywords
envelope
case
propellant charge
housing
cover
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.)
Expired - Lifetime
Application number
EP93402536A
Other languages
English (en)
French (fr)
Other versions
EP0594482A1 (de
Inventor
Marc Reuche
Bruno Lang
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.)
Luchaire Defense SA
Original Assignee
Luchaire Defense 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 Luchaire Defense SA filed Critical Luchaire Defense SA
Publication of EP0594482A1 publication Critical patent/EP0594482A1/de
Application granted granted Critical
Publication of EP0594482B1 publication Critical patent/EP0594482B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A1/00—Missile propulsion characterised by the use of explosive or combustible propellant charges
    • F41A1/08—Recoilless guns, i.e. guns having propulsion means producing no recoil
    • F41A1/10—Recoilless guns, i.e. guns having propulsion means producing no recoil a counter projectile being used to balance recoil

Definitions

  • the field of the present invention is that of boxes intended to contain a propellant charge and to be placed in a weapon tube without recoil, such boxes having the characteristics of the preamble of claims 1 and 11 (cf. WO-A -92/06344).
  • gargousses have the function of ensuring the maintenance as well as the initial confinement of the propellant charge.
  • they include two shoes, adjusted to the internal diameter of the tube, and connected by a rod whose rupture occurs for a well determined value of the pressure.
  • the hooves are then pushed in opposite directions, one carries the projectile and the other a counter-mass.
  • Patent FR2576682 describes such a type of housing.
  • Patent WO92 / 06344 describes a propellant charge box consisting of two substantially identical half-boxes which are assembled by a connection means which can be fragmented by the pressure of the gases.
  • Such a housing also has drawbacks.
  • the assembly of the housing is complex to carry out.
  • housing according to the invention is of simple design and nevertheless ensures gas tightness without the addition of complementary seals.
  • the invention also makes it possible to control the rupture characteristics of the housing at the pressure of gas, even in the case where the housing has a significant length.
  • the subject of the invention is therefore a housing intended to contain a propellant charge and to be put in place in a tube of a recoilless weapon, housing comprising a cylindrical envelope intended to come to adjust in a sliding manner in the tube of the weapon, and delimited by two side walls, casing having at least one rupture initiator at the level of the cylindrical envelope and being shared, after rupture of the latter under the effect of the pressure of the gases generated by the propellant charge , in at least two elements free to translate relative to each other, this box is characterized in that the cylindrical envelope is made in one piece and has two annular rupture initiators, each of them being arranged in the vicinity of a different side wall, and in that each element carries an envelope part ensuring gas tightness.
  • An advantage of such an arrangement is that it makes it possible to control the rupture characteristics of the housing which then only depend on the geometry and the choice of the material of the housing.
  • the rupture characteristics of the housing proposed by the invention are therefore not likely to be affected by the quality of an assembly of two half-housings (such as the bonding proposed by patent WO92 / 06344), assembly whose resistance risks in addition to vary with time and the storage constraints of the ammunition.
  • Another advantage of such an arrangement is that the casing of the casing is applied by the pressure of the gases against the internal surface of the tube and this before separating into two parts. The level of sealing thus obtained is excellent.
  • This arrangement also makes it possible to control the breaking characteristics of the housing, even if it has a significant length.
  • the length of the envelope portion located between the initiation of rupture and the side wall may be relatively short, which makes it possible to reduce the frictional forces of the envelope on the barrel of the weapon.
  • the location of the rupture initiators will be chosen so that they delimit on the envelope a front part and a rear part of substantially equal lengths.
  • At least one side wall is constituted by a cover made integral with the envelope by a connecting means.
  • This characteristic makes it possible to easily increase the rigidity of the side wall which must both resist the pressure of the gases and transmit the thrust forces to the projectile or to the counter-mass.
  • the envelope provided with a side wall can thus receive the igniter and the propellant charge, the cover then being placed so as to close the housing.
  • the cover has a peripheral groove in which is housed an internal rim of the envelope, rim and groove ensuring the joining of the envelope and the cover.
  • a side wall is formed in one piece with the envelope. This wall will preferably be that which is intended to be in the vicinity of the counterweight. Such an arrangement further facilitates the mounting of the housing.
  • the cover is formed by a rear part of the projectile.
  • the initiation of rupture can result from a thinning of the cylindrical envelope.
  • the housing comprises a cup of compressible foam intended to calibrate the propellant charge.
  • the envelope is made of flexible plastic material with a high coefficient of elongation and a low coefficient of friction.
  • the propellant charge is initiated by an igniter, placed inside the housing and at the axis of the latter, igniter resting in at least one housing arranged in a side wall.
  • This arrangement further facilitates the mounting of the housing and allows an output of the igniter wires through an orifice disposed in the axis of the housing, preferably on the cover.
  • the housing intended to contain a propellant charge and to be put in place in a tube of a recoilless weapon consists of two half-housings each comprising a cylindrical envelope intended to come to adjust sliding way in the barrel of the weapon, and each carrying a side wall, housing comprising at least one rupture initiator and being divided under the effect of the pressure of the gases generated by the propellant charge into at least two elements free of translate relative to each other, this housing is characterized in that each envelope carries an annular rupture initiator, and in that, after rupture of the latter, each housing element which translates relative to the the other carries an envelope part ensuring gas tightness.
  • This particular embodiment makes it possible to obtain very light housings.
  • a recoilless weapon 1 is shown schematically in half-section.
  • This weapon comprises a cylindrical tube 2 of axis 22, which is produced for example by filament wound. Inside the tube are arranged: a projectile 4, a housing 3 containing a propellant charge and a counter-mass 6.
  • Against the mass 6 is constituted for example by a bundle of plastic filaments intended to separate at their exit from the tube.
  • the projectile carries at its rear part stabilization fins 5. They are folded back inside the tube 2 and deploy when the projectile leaves the latter.
  • the housing 3 comprises a cylindrical envelope 7 which is adjusted sliding in the tube 2.
  • the envelope is closed by two side walls.
  • a first side wall hereinafter called the bottom wall 9, is formed in one piece with the envelope.
  • a second side wall is constituted by a cover 8.
  • the casing and the bottom are made of flexible plastic material with a high coefficient of elongation (of the order of 600% to 900%) and a low coefficient of friction (for example a coefficient of static friction on dry steel of between 0.15 and 0.25).
  • a high coefficient of elongation of the order of 600% to 900%
  • a low coefficient of friction for example a coefficient of static friction on dry steel of between 0.15 and 0.25.
  • the cover is made of aluminum alloy, but could also be made of plastic.
  • the realization of the metal cover ensures good mechanical strength thereof with a simple geometric shape (cylindrical). Mechanical resistance is essential to allow ejection of the projectile without gas leakage.
  • the envelope 7 has an internal rim 17 arranged at its opening. This rim is intended to be housed in a peripheral groove 18 of the cover 8.
  • the housing 3 defines an internal volume 11 intended to receive a propellant charge of known type, for example a powder with single base or double base flakes.
  • a black powder igniter 12 of known type is disposed in the volume 11 and at the level of the axis 22 of the weapon and of the casing. It is adjusted in a first housing 14 arranged on the cover 8 and it is supported in a second housing 15 produced on a cylindrical extension 16 of the bottom 9 of the housing.
  • the igniter is connected by wires (not shown) to a firing device (not shown) which is integral with the weapon.
  • the wires exit from the housing 3 through an orifice 13 arranged in the cover 8.
  • the metal cover 8 allows the igniter to be fixed in a rigid manner, which ensures that it remains well-vibrated.
  • the envelope 7 has at its median part an annular fracture initiator 10 whose profile is triangular. It defines two parts on the cylindrical casing 7: a front part 7a which is close to the cover 8 and a rear part 7b which is close to the bottom 9.
  • the cover 8 is mounted on the casing 7 by elastic deformation of the latter.
  • the cover is positioned at the opening of the casing 7 inside which the propellant charge and the igniter have been placed. It is then applied strongly against the envelope. The elasticity of the envelope ensures the establishment of the rim 17 in the groove 18 preventing any further separation of the cover and the envelope.
  • the igniter 12 When the igniter 12 is ignited, it in turn initiates the propellant charge which fills the internal volume 11. The pressure builds up inside the housing and it has the effect of strongly applying the envelope 7 against the inner surface of the tube.
  • the pressure is also exerted on the cover 8 and on the bottom wall 9, which has the effect of generating a tensile stress inside the envelope.
  • the envelope 7 is split in two at the level of the initiation of rupture 10.
  • Figure 2 shows the weapon at the time of this separation.
  • the igniter is no longer shown, its constituent elements having been fragmented by pressure.
  • the pressure of the gases pushes the projectile in the direction X via the cover 8 which carries the front part 7a of the envelope 7.
  • the pressure also pushes the counter-mass 6 in the direction Y via the bottom wall 9 secured to the rear part 7b of the casing 7.
  • the gas pressure is exerted radially on the parts 7a and 7b of the envelope and therefore firmly applies the latter against the internal surface of the tube 2.
  • each part of the envelope provides a seal against the propellant gases by preventing the latter from advancing towards the projectile or towards the counter-mass.
  • the front parts 7a and rear 7b Due to the triangular profile of the breaking point 10, the front parts 7a and rear 7b have lips identified 19a and 19b respectively.
  • the gas pressure is exerted on the lips 19a and 19b which further improves the seal obtained.
  • the separation between the front and rear parts of the housing takes place only after the pressure has applied the envelope against the internal surface of the tube.
  • FIG 3 shows a variant of the housing 3 in which a wedging bowl 20, made of polystyrene foam, is disposed in the housing. This bowl is supported on the bottom wall 9 and it is adjusted on the one hand to the internal surface of the casing 7 and on the other hand to the cylindrical extension 16.
  • the bowl 20 has a conical end 23 which bears on a bearing of complementary shape fitted on the cover 8.
  • a foam washer 21 is supported on the one hand on the cover 8 and on the other hand on the bowl 20.
  • Bowl 20 and washer 21 provide propellant loading timing. In addition, they make it possible to delimit a reduced internal volume 11 for setting up the load.
  • the rupture initiator could be arranged on the external surface of the housing.
  • the initiation of rupture can result from a weakening of the envelope, obtained for example by localized heating or else by a sudden variation in section.
  • bottom wall 9 which does not consist of a single piece with the envelope 7.
  • FIG. 4 represents a housing for propellant charge according to a second embodiment
  • the housing 3 comprises a cylindrical envelope 7 closed by two side walls.
  • the bottom wall 9 is formed in one piece with the envelope, and the cover 8 constitutes the second side wall.
  • the casing and the bottom are also made of flexible plastic material with a high coefficient of elongation, for example polyethylene.
  • the cover is made of aluminum alloy.
  • the internal rim 17 of the envelope is housed in the peripheral groove 18 of the cover 8 to ensure the connection of these two elements.
  • the internal volume 11 receives the propellant charge.
  • the igniter 12 with black powder is placed in the volume 11 and at the level of the axis 22 of the weapon and of the case. It is adjusted in a first housing 14 arranged on the cover 8 and it is supported on a stud 24 secured to the bottom 9 of the housing.
  • the casing 7 has two annular rupture initiators 10a, 10b.
  • Each rupture initiator is arranged in the vicinity of a side wall.
  • These incipient fractures define on the cylindrical casing 7 three parts: a front part 7a near the cover 8, a rear part 7b near the bottom 9 and a middle part 7c.
  • the breaking initiators are arranged so that the length L1 of the front part 7a of the envelope is substantially equal to the length L2 of the rear part 7b of the envelope.
  • Figure 5 shows the weapon at the time of this separation.
  • the pressure of the gases pushes the projectile in the direction X via the cover 8 which carries the front part 7a of the envelope 7.
  • the pressure also pushes the counter-mass 6 in the direction Y via the bottom wall 9 secured to the rear part 7b of the casing 7.
  • the middle part 7c of the envelope remains applied to the wall of the tube.
  • This variant makes it possible to limit the values of the lengths L1 and L2 (for example to 5 to 10 mm). This reduces the friction forces between the tube 2 and the front 7a and rear 7b parts of the envelope and avoids the risks of ruptures at locations different from those of the primers of ruptures 10a and 10b.
  • Such an arrangement ensures the reproducibility of the location of envelope ruptures, even in the case where the housing has a significant length (greater than or equal to the diameter).
  • Another advantage of such an embodiment is that it allows, by playing on the values of L1 and L2, to obtain tube / envelope friction forces which are different for the front and rear parts of the latter. It is thus possible to adjust the recoil forces of a given weapon.
  • FIG. 6 shows a box in which the length L2 is twice the length L1.
  • the friction force on the tube 2 of the rear part 7b of the envelope is then twice that of the front part 7a.
  • FIG. 7 shows such a variant.
  • the box 3 consists of two half-boxes 3a and 3b made integral by a thread 25.
  • each half-housing constitutes a side wall 26a, 26b.
  • a propellant charge is placed in a case 28, placed at the axis of the housing, and held by a spacer 27 bearing on the internal surface of the half-housing 3b.
  • Each half-casing carries a cylindrical envelope (71a, 71b) on which a rupture initiator (10a, 10b) is arranged.
  • Each rupture initiator is disposed in the vicinity of a different side wall 26a, 26b.
  • FIG. 9 represents another variant in which the housing according to the invention is closed by a cover 8 which is formed by the rear of the projectile 4.
  • Such an arrangement facilitates mounting of the weapon, the projectile carrying the propellant charge box then constituting a sub-assembly.
  • the aerodynamic forces cause the casing part 7a to be ejected, which therefore does not disturb the trajectory of the projectile.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Medicinal Preparation (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Hydrogenated Pyridines (AREA)
  • Fats And Perfumes (AREA)
  • Toys (AREA)

Claims (11)

  1. Gehäuse (3) zur Aufnahme der Treibladung und zum Unterbringen in einem Rohr (2) einer rückstoßfreien Waffe, das einen zylindrischen Mantel (7) enthält, der sich gleitend in das Waffenrohr paßt, abgegrenzt durch zwei Seitenwände (8, 9), wobei das Gehäuse mindestens einen Bruchansatz (10) auf der Ebene des zylindrischen Mantels aufweist und nach dem Bruch dieses Bruchansatzes unter der Einwirkung der von der Treibladung erzeugten Gase in mindestens zwei Elemente geteilt wird, die sich gegeneinander verschieben können, gekennzeichnet dadurch , daß der zylindrische Mantel (7) aus einem einzigen Stück besteht und zwei ringförmige Bruchansätze (10a, 10b) aufweist, die jeweils in der Nähe einer anderen Seitenwand angebracht sind, und daß jedes Gehäuseelement, das sich bezogen auf das andere verschiebt, einen Mantelteil (7a, 7b) trägt, der eine Abdichtung gegen die Gase gewährleistet.
  2. Gehäuse gemäß dem Anspruch 1, gekennzeichnet dadurch, daß die Bruchansätze (10a, 10b) so angebracht sind, daß sie auf dem Mantel einen Vorderteil (7a) und einen Hinterteil (7b) mit in etwa gleichen Längen abgrenzen.
  3. Gehäuse gemäß einem der Ansprüche 1 bis 2, gekennzeichnet dadurch, daß mindestens eine Seitenwand aus einem Deckel (8) besteht, der mit dem Mantel (7) durch ein Verbindungsmittel fest verbunden ist.
  4. Gehäuse gemäß dem Anspruch 3, gekennzeichnet dadurch, daß der Deckel (8) eine periphere Hohlkehle (18) aufweist, in die sich ein Innenrand (17) des Mantels (7) einfügt, wobei der Innenrand und die Hohlkehle die feste Verbindung des Mantels (7) und Deckels (8) gewährleisten.
  5. Gehäuse gemäß einem der Ansprüche 3 oder 4, gekennzeichnet dadurch, daß eine Seitenwand (9) aus einem einzigen Stück mit dem Mantel (7) gebildet ist.
  6. Gehäuse gemäß einem der Ansprüche 3 bis 5, gekennzeichnet dadurch, daß der Deckel (8) aus einem hinteren Teil des Geschosses (4) besteht.
  7. Gehäuse gemäß einem der Ansprüche 1 bis 6, gekennzeichnet dadurch, daß der Bruchansatz (10) aus einer Verdünnung des zylindrischen Mantels (7) besteht.
  8. Gehäuse gemäß einem der Ansprüche 1 bis 7, gekennzeichnet dadurch, daß er eine Schale (20) aus zusammendrückbarem Schaumstoff enthält, die eine Verkeilung der Treibladung gewährleisten soll.
  9. Gehäuse gemäß einem der Ansprüche 1 bis 8, gekennzeichnet dadurch, daß der Mantel (7) aus geschmeidigem Kunststoff mit hohem Dehnungskoeffizienten und geringem Reibungskoeffizienten besteht.
  10. Gehäuse gemäß einem der Ansprüche 1 bis 9, gekennzeichnet dadurch, daß die Treibladung von einem Zünder (12) gezündet wird, der im Inneren des Gehäuses und auf der Ebene der Achse (22) des Gehäuses angeordnet ist, und der sich in mindestens eine Aussparung (14, 15) stützt, die in einer Seitenwand (8,9) angebracht ist.
  11. Gehäuse (3) zum Aufnehmen einer Treibladung und Unterbringen in einem Rohr (2) einer rückstoßfreien Waffe, Gehäuse bestehend aus zwei Halbgehäusen (3a, 3b), die jeweils einen zylindrischen Mantel (71, 71b) enthalten, der sich gleitend in das Waffenrohr paßt, wobei jeder zylindrische Mantel (71a, 71b) eine Seitenwand (26a, 26b) beträgt und das Gehäuse mindestens einen Bruchansatz aufweist und unter der Einwirkung der von der Treibladung erzeugten Gase in mindestens zwei Elemente geteilt wird, die sich gegeneinander verschieben können, wobei das Gehäuse dadurch gekennzeichnet ist , daß jeder Mantel (71a, 71b) einen ringförmigen Bruchansatz (10a, 10b) aufweist, und dadurch, daß nach dem Bruch dieser Bruchansätze jedes Element des Gehäuses, das sich bezogen auf das andere verschiebt, einen Mantelteil (7a, 7b) trägt, der eine Abdichtung gegen die Gase gewährleistet.
EP93402536A 1992-10-22 1993-10-14 Treibladungsbehälter Expired - Lifetime EP0594482B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9212643A FR2697327B1 (fr) 1992-10-22 1992-10-22 Boîtier pour charge propulsive.
FR9212643 1992-10-22

Publications (2)

Publication Number Publication Date
EP0594482A1 EP0594482A1 (de) 1994-04-27
EP0594482B1 true EP0594482B1 (de) 1997-01-15

Family

ID=9434778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93402536A Expired - Lifetime EP0594482B1 (de) 1992-10-22 1993-10-14 Treibladungsbehälter

Country Status (8)

Country Link
US (1) US5370032A (de)
EP (1) EP0594482B1 (de)
JP (1) JPH06201296A (de)
AT (1) ATE147846T1 (de)
AU (1) AU671150B2 (de)
DE (1) DE69307453T2 (de)
ES (1) ES2096887T3 (de)
FR (1) FR2697327B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714165B1 (fr) * 1993-12-22 1996-02-09 Luchaire Defense Sa Système de contre-masse dispersable pour arme sans recul.
FR2722872B1 (fr) * 1994-07-19 1996-10-04 Lacroix Soc E Dispositif pyrotechnique de lancement d'au moins un projectile
FR2770637B1 (fr) 1997-11-03 1999-12-03 Giat Ind Sa Projectile a charge formee et systeme d'arme tirant un tel projectile
FI20085083L (fi) * 2008-01-31 2009-08-01 Patria Weapon Systems Oy Sovitelma ja menetelmä kranaatin tukemiseksi takaaladattavan aseen putkeen
CN105783594A (zh) 2009-02-02 2016-07-20 威罗门飞行公司 多模式无人驾驶航空飞行器
DK3133019T3 (en) 2009-09-09 2019-02-18 Aerovironment Inc NOISE DEVICE FOR A DRONE PROTECTION PIPE
US9108713B2 (en) 2009-09-09 2015-08-18 Aerovironment, Inc. Elevon control system
DK2858898T3 (da) * 2012-06-07 2017-11-27 Aerovironment Inc System til at aftageligt koble et førerløst luftfartøj inden i et udskydningsrør

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US1108717A (en) * 1913-07-07 1914-08-25 Ordnance Dev Company Fixed ammunition for use on air-craft.
FR619616A (fr) * 1925-12-08 1927-04-06 étau indesserrable et à serrage instantané
GB854516A (en) * 1950-08-04 1960-11-23 Hugo Abramson Improvements in recoilless guns
GB806193A (en) * 1954-03-17 1958-12-23 Latham Valentine Stewart Black Improvements in recoilless guns
NL295876A (de) * 1962-08-01
US3279319A (en) * 1964-06-19 1966-10-18 Joseph W Semonian Floatable rocket launcher
DE2055805C3 (de) * 1970-11-13 1974-03-28 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Abschußvorrichtung für Geschosse
DE3503040A1 (de) * 1985-01-30 1986-07-31 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Vorrichtung zum rueckstoss- und signaturfreien abschiessen von geschossen
CH668473A5 (de) * 1985-11-29 1988-12-30 Oerlikon Buehrle Ag Vorrichtung zum rueckstossfreien abschiessen von geschossen aus einem abschussrohr.
DE3727365A1 (de) * 1987-08-17 1989-03-02 Messerschmitt Boelkow Blohm Treibspiegel zum ausstossen von munition
GB9021060D0 (en) * 1990-09-27 1990-11-07 Secr Defence Double piston propulsion unit

Also Published As

Publication number Publication date
FR2697327A1 (fr) 1994-04-29
AU671150B2 (en) 1996-08-15
DE69307453D1 (de) 1997-02-27
ES2096887T3 (es) 1997-03-16
ATE147846T1 (de) 1997-02-15
EP0594482A1 (de) 1994-04-27
DE69307453T2 (de) 1997-05-22
FR2697327B1 (fr) 1994-12-30
JPH06201296A (ja) 1994-07-19
US5370032A (en) 1994-12-06
AU4913693A (en) 1994-05-05

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