EP0594482A1 - Treibladungsbehälter - Google Patents

Treibladungsbehälter Download PDF

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Publication number
EP0594482A1
EP0594482A1 EP93402536A EP93402536A EP0594482A1 EP 0594482 A1 EP0594482 A1 EP 0594482A1 EP 93402536 A EP93402536 A EP 93402536A EP 93402536 A EP93402536 A EP 93402536A EP 0594482 A1 EP0594482 A1 EP 0594482A1
Authority
EP
European Patent Office
Prior art keywords
envelope
housing
propellant charge
rupture
housing according
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
EP93402536A
Other languages
English (en)
French (fr)
Other versions
EP0594482B1 (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
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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 housings intended to contain a propellant charge and to be placed in a weapon tube without recoil.
  • 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 made up 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 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, this casing is characterized in that the cylindrical envelope is made in one piece and has at least one annular rupture initiator and in that, after rupture of the latter under the effect of the pressure of the gases generated by the propellant charge, the casing is divided into at least two elements which are free to translate relative to each other, each element carrying 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 W092 / 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.
  • the cylindrical casing has two incipient fractures, each of which being arranged in the vicinity of a different side wall.
  • This particular embodiment makes it possible to control the rupture characteristics of the housing at gas pressure, even in the case where the housing has a considerable length. Indeed, each rupture initiator being placed in the vicinity of a different lateral wall, the length of the envelope portion situated between the rupture initiator and the lateral wall can be relatively short, which makes it possible to reduce the friction 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 counter mass. 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 includes a cup of compressible foam keen 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, envelopes each carrying a side wall, this casing is characterized in that each envelope carries an annular rupture initiator, and in that, after rupture of the latter under the effect of the pressure gases generated by the propellant charge, the housing is divided into at least two elements free to translate relative to each other, each element carrying an envelope portion 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 subsequent separation of the cover and the envelope.
  • 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.

Landscapes

  • 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)
  • Toys (AREA)
  • Fats And Perfumes (AREA)
EP93402536A 1992-10-22 1993-10-14 Treibladungsbehälter Expired - Lifetime EP0594482B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
EP0594482A1 true EP0594482A1 (de) 1994-04-27
EP0594482B1 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 (9)

* 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
FI20085083A7 (fi) * 2008-01-31 2009-08-01 Patria Weapon Systems Oy Sovitelma ja menetelmä kranaatin tukemiseksi takaaladattavan aseen putkeen
KR102396455B1 (ko) 2009-02-02 2022-05-10 에어로바이론먼트, 인크. 멀티모드 무인 항공기
WO2011066031A2 (en) 2009-09-09 2011-06-03 Aerovironment, Inc. Elevon control system
CN102596722B (zh) 2009-09-09 2016-08-03 威罗门飞行公司 用于远程工作的无人驾驶航空飞行器的带有便携式rf透明发射管的抑制爆炸声的发射器的系统和设备
KR102222167B1 (ko) * 2012-06-07 2021-03-03 에어로바이론먼트, 인크. 발사관 내에서 무인 항공기를 탈착가능하게 연결시키는 시스템
CN119021728A (zh) * 2024-10-25 2024-11-26 河南景鹏建设工程有限公司 一种巷道中安全施工的防护装置及其使用方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB806194A (en) * 1954-03-17 1958-12-23 Latham Valentine Stewart Black Improvements in ammunition rounds for guns
GB2183800A (en) * 1985-11-29 1987-06-10 Oerlikon Buehrle Ag Recoilless firing device
FR2619616A1 (fr) * 1987-08-17 1989-02-24 Messerschmitt Boelkow Blohm Sabot pour ejecter des masses, notamment pour ejecter une munition du tube d'une arme
WO1992006344A1 (en) * 1990-09-27 1992-04-16 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Double piston propulsion unit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB806194A (en) * 1954-03-17 1958-12-23 Latham Valentine Stewart Black Improvements in ammunition rounds for guns
GB2183800A (en) * 1985-11-29 1987-06-10 Oerlikon Buehrle Ag Recoilless firing device
FR2619616A1 (fr) * 1987-08-17 1989-02-24 Messerschmitt Boelkow Blohm Sabot pour ejecter des masses, notamment pour ejecter une munition du tube d'une arme
WO1992006344A1 (en) * 1990-09-27 1992-04-16 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Double piston propulsion unit

Also Published As

Publication number Publication date
FR2697327A1 (fr) 1994-04-29
EP0594482B1 (de) 1997-01-15
DE69307453T2 (de) 1997-05-22
DE69307453D1 (de) 1997-02-27
ATE147846T1 (de) 1997-02-15
ES2096887T3 (es) 1997-03-16
AU4913693A (en) 1994-05-05
US5370032A (en) 1994-12-06
AU671150B2 (en) 1996-08-15
JPH06201296A (ja) 1994-07-19
FR2697327B1 (fr) 1994-12-30

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