EP1464912B1 - Device for recovering energy produced during the recoil of a weapon - Google Patents

Device for recovering energy produced during the recoil of a weapon Download PDF

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Publication number
EP1464912B1
EP1464912B1 EP04290759A EP04290759A EP1464912B1 EP 1464912 B1 EP1464912 B1 EP 1464912B1 EP 04290759 A EP04290759 A EP 04290759A EP 04290759 A EP04290759 A EP 04290759A EP 1464912 B1 EP1464912 B1 EP 1464912B1
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EP
European Patent Office
Prior art keywords
weapon
chamber
cylinder
recoil
energy
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP04290759A
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German (de)
French (fr)
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EP1464912A1 (en
Inventor
Alain Charton
Dominique Guesnet
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Nexter Systems SA
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Nexter Systems SA
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Priority to PL04290759T priority Critical patent/PL1464912T3/en
Publication of EP1464912A1 publication Critical patent/EP1464912A1/en
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    • 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
    • F41A25/00—Gun mountings permitting recoil or return to battery, e.g. gun cradles; Barrel buffers or brakes
    • F41A25/16—Hybrid systems
    • F41A25/20—Hydropneumatic systems

Definitions

  • the technical sector of the invention is that of the braking systems of a moving element, for example a weapon during the recoil caused by firing a projectile and recovering the energy thus developed.
  • EP-0403452 describes a device for using stored energy to close the breech of a weapon.
  • the device described only allows the use of energy for a single movement performed back and forth such as, for example, the opening / closing of the cylinder head or the ejection of the sleeve.
  • the proposed devices do not allow the storage of the recovered energy for possible use for other purposes.
  • the patent EP491106 describes a reversing brake coupled to a recovery cylinder.
  • a recovery cylinder comprises a free piston delimiting a gas chamber and a fluid chamber.
  • the recoil of the weapon causes a pressurization of the chamber while ensuring the suction of fluid via the channel to compensate for leaks.
  • the battery return is via a double piston.
  • the device described in this document is in fact an improved gas recovery system in that it includes an outward connection allowing to use an excess of pressure to control an actuator and also to raise the pressure level by an external generator. However, it does not allow to feed a battery.
  • the known energy recuperators do not allow to feed several networks.
  • the subject of the invention is therefore a device for recovering the energy produced during the recoil of a weapon, comprising an energy recovery cylinder actuated by the recoil of the weapon, a double-effect recuperation cylinder comprising a first and a second second chamber separated by a piston, the first chamber of the jack being connected to a hydraulic supply circuit of the weapon, the piston of this jack pushing the hydraulic fluid of this circuit into a storage accumulator during the recoil of the weapon , characterized in that the second chamber of the energy recovery cylinder is connected to an elastic link of the weapon which ensures its pressurization during the recoil of the weapon, the recovery cylinder further comprising a rod secured to the piston rod which is pushed by the weapon during the return in battery of this one.
  • the energy recovery cylinder is connected to the hydraulic supply circuit of the weapon via a main pipe which divides into at least two secondary pipes provided with the first and second valves allowing the passage of fluid in one direction, a secondary pipe connecting the main pipe to the storage accumulator and another secondary pipe connecting the main pipe to a booster battery.
  • the first valve is disposed between the booster accumulator and the main pipe
  • the second valve is disposed between the main pipe and the storage accumulator, the first valve being closed and the second valve open when the weapon retreats.
  • the storage accumulator can supply fluid under pressure to the hydraulic network of the weapon via a service line.
  • the second chamber of the recovery cylinder is connected to the nitrogen chamber of the elastic link.
  • the second chamber of the recovery cylinder is connected to the elastic link via an oil circuit defined on the side of the nitrogen chamber of the elastic link by a free piston which isolates the nitrogen and the oil circuit.
  • the second chamber of the recovery cylinder is connected to the oil chamber of the elastic link.
  • a weapon 1 whose recoil mass 1a is partially diagrammed. With each shot of the weapon and in a known manner, the weapon 1 is moved back and forth along the arrow F1.
  • This weapon 1 is attached to an elastic link 20 comprising a first jack 9 whose rod 21 is integral with the recoil mass of the weapon and a nitrogen chamber 10.
  • the rod 21 is integral with a piston 32 sliding in the cylinder 9 and delimiting the chambers 8 and 23.
  • the nitrogen chamber 10 is limited by a free piston 7 which is also subjected to the action of the fluid present in the cylinder 9 via a chamber 22.
  • the weapon moves quickly following the arrow F2.
  • the fluid of the cylinder 9 passes through a calibrated orifice and feeds the chamber 22 which causes compression by the free piston 7 of the nitrogen contained in the chamber 10.
  • the recoil of the weapon is by elsewhere quickly braked by a recoil brake (not shown) coupled to the elastic link 20.
  • the compressed nitrogen in the chamber 10 exerts a pressure on the piston 7 which makes it possible to cause, after recoil, the return to battery of the recoil mass 1a, and the return of the rod 21 to its initial position.
  • an energy recovery device 2 which is connected to the nitrogen chamber 10 and actuated by the recoil of the weapon.
  • This device is represented on the lower part of the figure 1 .
  • the device comprises a cylinder 3 recovery rod of energy, comprising a piston 24 sliding in the body of the cylinder 3 and secured to a rod 4 which is supported at one end against the recoil mass 1a of the weapon 1.
  • This piston 24 defines a first chamber 6 and a second chamber 5.
  • the second chamber 5 of the cylinder 3 is in communication with the nitrogen chamber 10 and therefore also contains nitrogen.
  • the first chamber 6 is in communication with a fluid accumulator assembly 25.
  • the assembly 25 comprises on the one hand a booster accumulator 15 and on the other hand a storage accumulator 16.
  • the accumulator 15 can be supplied with oil through a pipe 26 leading the return of the oil from the various actuators of the hydraulic circuit (not shown).
  • the accumulator may also be powered by a pump motor 18.
  • the booster accumulator 15 is a low pressure accumulator (pressure of the order of 3 10 5 Pa to 10 6 Pa).
  • the storage accumulator 16 is in the form of a pressurized oil reservoir which is intended to supply one or more devices (not shown) via a service line 27.
  • the storage accumulator 16 is a high pressure accumulator (pressure of the order of 1.5 ⁇ 10 7 Pa at 2.5 ⁇ 10 7 Pa).
  • the chamber 6 of the jack 3 communicates with the assembly 25 by a main pipe 19 which is divided into two branches 11 and 12 each provided with a non-return valve, respectively 13 and 14.
  • the valve 13 allows the passage of compressed fluid only the booster accumulator 15 to the cylinder 3.
  • the valve 14 only allows the supply of the storage accumulator 16 compressed fluid from the piston 3 (the low pressure of the booster accumulator 15 is always lower at the high pressure of the storage accumulator 16).
  • the compressed fluid can be conventionally oil.
  • Each accumulator 15 or 16 will comprise in a conventional manner and not shown a gas chamber isolated from the fluid by a membrane and allowing the pressurization of the accumulator.
  • the figure 2 illustrates the device according to the invention during an intermediate step of the recoil phase of the weapon, that is to say the energy recovery phase, the final position of the weapon not being shown because it is not necessary for understanding the operation.
  • the recoil mass of the weapon 1 has moved back a certain distance along the arrow F2 by driving with it the rod 21 of the cylinder 9.
  • the elastic link 20 fulfills its function and the fluid contained in the chamber 23 is forced back into the chamber 22 which causes the compression of the nitrogen contained in the chamber 10.
  • the pressure of the nitrogen in the chamber 5 increases concomitantly and pushes the piston 24 of the recuperator 3, which forces the oil contained in the first chamber 6.
  • This pressurized oil is led through the valve 14 into the storage tank 16 at high pressure. So we recovered some of the energy produced by the recoil of the weapon. This energy is available in the accumulator 16 to be used at any time, for example via a pipe 27.
  • the figure 3 shows the device according to the invention during the battery return phase of the weapon. It is the pressure of the nitrogen contained in the chamber 10 which, as indicated succinctly above, causes this movement back to the battery of the weapon.
  • the recoil mass of the weapon 1 then pushes the rod 4 of the cylinder 3 (and thus the piston 24) and returns it to its initial position as shown in FIG. figure 1 .
  • This return movement of the piston 24 causes a depression of oil in the main pipe 19 which has the effect of opening the valve 13 and the booster accumulator 15 ensures the oil filling of the first chamber 6 of the cylinder 3.
  • the valve 14 remains closed by the high pressure of the storage recuperator 16 which is greater than the pressure supplied by the booster accumulator 15.
  • the figure 4 illustrates a variant of the recovery device according to the invention.
  • the second chamber 5 of the recovery cylinder 3 is connected to the elastic link 20 by via an oil circuit comprising a pipe 29.
  • This oil circuit is delimited on the side of the nitrogen chamber 10 of the elastic link 20 by a second free piston 17 which isolates the nitrogen and the fuel system. 'oil.
  • the chamber 10 containing the nitrogen no longer communicates with the second chamber 5 of the recovery cylinder 3.
  • the piston 17 carries a rod 31, the output of the elastic link 20, to visualize the oil filling of the system.
  • the operating principle remains generally the same, the nitrogen pressure then applies to the piston 24 of the recovery cylinder 3 via another fluid.
  • This embodiment has the advantage of being safer. Indeed, if a rupture of the pipe 29 occurs by accident, there is no leakage of nitrogen and the elastic link 20 remains functional. Shots therefore remain possible.
  • the figure 5 illustrates another variant embodiment of the recovery device according to the invention.
  • the second chamber 5 of the recovery cylinder 3 is connected to the oil chamber 22 of the elastic linkage 20 of the weapon via a pipe 30.
  • the oil is pushed from the chamber 23 to the chamber 22 and thus to the second chamber 5 of the recovery cylinder 3.
  • the nitrogen pressure of the chamber 10 brings back in battery the recoil mass of the armed.
  • the recoil mass pushes the rod 4 and the oil depression that results in the main pipe 19 causes the oil re-supply of the circuit by the booster accumulator 15.
  • Other variants are of course possible without leaving out of the scope of the invention.
  • this circuit also includes the usual control and safety devices such as manometers and pressure relief valves.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Laser Surgery Devices (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Generation Of Surge Voltage And Current (AREA)

Abstract

The device (2) has a jack (3) for recovering and storing energy produced by the retreat of a weapon (1), and including two chambers (5, 6) separated by a piston (24). One of the rooms of the jack is connected to a hydraulic supply circuit of the weapon. The piston of the jack pushes a hydraulic fluid in a storage accumulator (16) of the hydraulic supply circuit during the retreat of weapon.

Description

Le secteur technique de l'invention est celui des systèmes de freinage d'un élément en mouvement, par exemple une arme lors du recul provoqué par le tir d'un projectile et permettant de récupérer l'énergie ainsi développée.The technical sector of the invention is that of the braking systems of a moving element, for example a weapon during the recoil caused by firing a projectile and recovering the energy thus developed.

De tels dispositifs sont connus et on peut se reporter au brevet EP-0403452 , lequel décrit un dispositif permettant d'utiliser de l'énergie stockée pour fermer la culasse d'une arme. Le dispositif décrit ne permet d'utiliser l'énergie que pour un seul mouvement effectué en va et vient tel que, par exemple, l'ouverture/fermeture de la culasse ou encore l'éjection de la douille. De façon générale, les dispositifs proposés ne permettent pas le stockage de l'énergie récupérée pour l'utiliser éventuellement à d'autres fins.Such devices are known and reference can be made to EP-0403452 which describes a device for using stored energy to close the breech of a weapon. The device described only allows the use of energy for a single movement performed back and forth such as, for example, the opening / closing of the cylinder head or the ejection of the sleeve. In general, the proposed devices do not allow the storage of the recovered energy for possible use for other purposes.

Le brevet EP491106 décrit un frein de recul couplé à un cylindre récupérateur. Un cylindre récupérateur comporte un piston libre délimitant une chambre à gaz et une chambre à fluide hydraulique. Le recul de l'arme provoque une pressurisation de la chambre tout en assurant l'aspiration de fluide via le canal pour compenser les fuites. Le retour en batterie se fait via un double piston. Le dispositif décrit par ce document est en fait un système récupérateur à gaz amélioré en ce qu'il comporte une connexion vers l'extérieur permettant d'utiliser un trop plein de pression pour commander un actionneur et permettant aussi de remonter le niveau de pression par un générateur externe. Il ne permet cependant pas d'alimenter un accumulateur.The patent EP491106 describes a reversing brake coupled to a recovery cylinder. A recovery cylinder comprises a free piston delimiting a gas chamber and a fluid chamber. The recoil of the weapon causes a pressurization of the chamber while ensuring the suction of fluid via the channel to compensate for leaks. The battery return is via a double piston. The device described in this document is in fact an improved gas recovery system in that it includes an outward connection allowing to use an excess of pressure to control an actuator and also to raise the pressure level by an external generator. However, it does not allow to feed a battery.

Par ailleurs, les récupérateurs d'énergie connus ne permettent pas d'alimenter plusieurs réseaux.Moreover, the known energy recuperators do not allow to feed several networks.

On sait que l'alimentation d'un réseau hydraulique nécessite souvent un générateur hydraulique du type moteur + pompe dont l'encombrement et la masse sont problématiques et le rendent difficile à intégrer dans le bâti de l'arme.It is known that the supply of a hydraulic network often requires a hydraulic generator of the motor + pump type whose size and mass are problematic and make it difficult to integrate into the frame of the weapon.

C'est le but de l'invention que de proposer un dispositif de récupération de l'énergie qui pallie ces inconvénients en permettant de récupérer une partie de l'énergie de recul de l'arme et de la restituer selon les besoins de l'utilisateur.It is the object of the invention to provide an energy recovery device which overcomes these drawbacks by allowing to recover some of the energy of recoil of the weapon and to restore it according to the needs of the user.

L'invention a donc pour objet un dispositif de récupération de l'énergie produite lors du recul d'une arme, comprenant un vérin récupérateur d'énergie actionné par le recul de l'arme, vérin récupérateur à double effet comprenant une première et une deuxième chambres séparées par un piston, la première chambre du vérin étant reliée à un circuit d'alimentation hydraulique de l'arme, le piston de ce vérin poussant le fluide hydraulique de ce circuit dans un accumulateur de stockage lors du recul de l'arme, dispositif caractérisé en ce que la deuxième chambre du vérin récupérateur d'énergie est reliée à un lien élastique de l'arme qui assure sa pressurisation lors du recul de l'arme, le vérin récupérateur comportant par ailleurs une tige solidaire du piston, tige qui est poussée par l'arme lors du retour en batterie de celle ci.The subject of the invention is therefore a device for recovering the energy produced during the recoil of a weapon, comprising an energy recovery cylinder actuated by the recoil of the weapon, a double-effect recuperation cylinder comprising a first and a second second chamber separated by a piston, the first chamber of the jack being connected to a hydraulic supply circuit of the weapon, the piston of this jack pushing the hydraulic fluid of this circuit into a storage accumulator during the recoil of the weapon , characterized in that the second chamber of the energy recovery cylinder is connected to an elastic link of the weapon which ensures its pressurization during the recoil of the weapon, the recovery cylinder further comprising a rod secured to the piston rod which is pushed by the weapon during the return in battery of this one.

Suivant une caractéristique de l'invention, le vérin récupérateur d'énergie est relié au circuit d'alimentation hydraulique de l'arme par l'intermédiaire d'une canalisation principale qui se divise en au moins deux canalisations secondaires munies des premier et second clapets autorisant le passage de fluide dans un seul sens, une canalisation secondaire reliant la canalisation principale à l'accumulateur de stockage et une autre canalisation secondaire reliant la canalisation principale à un accumulateur de gavage.According to a characteristic of the invention, the energy recovery cylinder is connected to the hydraulic supply circuit of the weapon via a main pipe which divides into at least two secondary pipes provided with the first and second valves allowing the passage of fluid in one direction, a secondary pipe connecting the main pipe to the storage accumulator and another secondary pipe connecting the main pipe to a booster battery.

Suivant une caractéristique de l'invention, le premier clapet est disposé entre l'accumulateur de gavage et la canalisation principale, et le deuxième clapet est disposé entre la canalisation principale et l'accumulateur de stockage, le premier clapet étant fermé et le second clapet ouvert lors du recul de l'arme.According to a feature of the invention, the first valve is disposed between the booster accumulator and the main pipe, and the second valve is disposed between the main pipe and the storage accumulator, the first valve being closed and the second valve open when the weapon retreats.

L'accumulateur de stockage pourra alimenter en fluide sous pression le réseau hydraulique de l'arme par l'intermédiaire d'une canalisation de service.The storage accumulator can supply fluid under pressure to the hydraulic network of the weapon via a service line.

Suivant une variante de réalisation de l'invention, la deuxième chambre du vérin récupérateur est reliée à la chambre d'azote du lien élastique.According to an alternative embodiment of the invention, the second chamber of the recovery cylinder is connected to the nitrogen chamber of the elastic link.

Suivant une autre variante de réalisation de l'invention, la deuxième chambre du vérin récupérateur est reliée au lien élastique par l'intermédiaire d'un circuit d'huile délimité du côté de la chambre d'azote du lien élastique par un piston libre qui isole l'azote et le circuit d'huile.According to another embodiment of the invention, the second chamber of the recovery cylinder is connected to the elastic link via an oil circuit defined on the side of the nitrogen chamber of the elastic link by a free piston which isolates the nitrogen and the oil circuit.

Suivant une autre variante de réalisation de l'invention, la deuxième chambre du vérin récupérateur est reliée à la chambre d'huile du lien élastique.According to another embodiment of the invention, the second chamber of the recovery cylinder is connected to the oil chamber of the elastic link.

D'autres caractéristiques, détails et avantages de l'invention apparaîtront plus clairement à la lecture du complément de description donné ci-après à titre d'illustration en relation avec des dessins sur lesquels :

  • la figure 1 représente schématiquement le dispositif selon l'invention en phase statique,
  • la figure 2 représente schématiquement le dispositif selon l'invention en phase de recul, c'est-à-dire en phase d'accumulation d'énergie,
  • la figure 3 représente schématiquement le dispositif selon l'invention en phase de rentrée en batterie, c'est-à-dire en phase de gavage du vérin de récupération d'énergie,
  • la figure 4 représente schématiquement une première variante du dispositif selon l'invention, et
  • la figure 5 représente schématiquement une deuxième variante du dispositif selon l'invention.
Other features, details and advantages of the invention will appear more clearly on reading the additional description given below by way of illustration in relation to drawings in which:
  • the figure 1 schematically represents the device according to the invention in static phase,
  • the figure 2 schematically represents the device according to the invention in the recoil phase, that is to say in the energy accumulation phase,
  • the figure 3 schematically represents the device according to the invention in the battery return phase, that is to say in the power-up phase of the energy recovery cylinder,
  • the figure 4 schematically represents a first variant of the device according to the invention, and
  • the figure 5 schematically represents a second variant of the device according to the invention.

On a représenté sur la partie supérieure de la figure 1 une arme 1 dont la masse reculante 1a est schématisée partiellement. A chaque tir de l'arme et de façon connue, l'arme 1 est animée d'un mouvement de va et vient selon la flèche F1. Cette arme 1 est attachée à un lien élastique 20 comprenant un premier vérin 9 dont la tige 21 est solidaire de la masse reculante de l'arme et une chambre d'azote 10. La tige 21 est solidaire d'un piston 32 coulissant dans le vérin 9 et délimitant les chambres 8 et 23. La chambre d'azote 10 est limitée par un piston libre 7 qui est également soumis à l'action du fluide présent dans le vérin 9 par l'intermédiaire d'une chambre 22. Lors du recul de l'arme après le tir d'une munition, l'arme se déplace rapidement suivant la flèche F2. De façon connue, le fluide du vérin 9 passe par un orifice calibré et vient alimenter la chambre 22 ce qui provoque une compression par le piston libre 7 de l'azote contenu dans la chambre 10. Le mouvement de recul de l'arme est par ailleurs rapidement freiné grâce à un frein de recul (non représenté) couplé au lien élastique 20.We have shown on the upper part of the figure 1 a weapon 1 whose recoil mass 1a is partially diagrammed. With each shot of the weapon and in a known manner, the weapon 1 is moved back and forth along the arrow F1. This weapon 1 is attached to an elastic link 20 comprising a first jack 9 whose rod 21 is integral with the recoil mass of the weapon and a nitrogen chamber 10. The rod 21 is integral with a piston 32 sliding in the cylinder 9 and delimiting the chambers 8 and 23. The nitrogen chamber 10 is limited by a free piston 7 which is also subjected to the action of the fluid present in the cylinder 9 via a chamber 22. At the recoil of the weapon after the firing of a munition, the weapon moves quickly following the arrow F2. In known manner, the fluid of the cylinder 9 passes through a calibrated orifice and feeds the chamber 22 which causes compression by the free piston 7 of the nitrogen contained in the chamber 10. The recoil of the weapon is by elsewhere quickly braked by a recoil brake (not shown) coupled to the elastic link 20.

L'azote comprimé dans la chambre 10 exerce une pression sur le piston 7 ce qui permet de provoquer, après le recul, le retour en batterie de la masse reculante la, et le retour de la tige 21 à sa position initiale.The compressed nitrogen in the chamber 10 exerts a pressure on the piston 7 which makes it possible to cause, after recoil, the return to battery of the recoil mass 1a, and the return of the rod 21 to its initial position.

Suivant l'invention, on prévoit un dispositif de récupération d'énergie 2 qui est relié à la chambre d'azote 10 et actionné par le recul de l'arme. Ce dispositif est représenté sur la partie inférieure de la figure 1. A cette fin, le dispositif comprend un vérin tige 3 récupérateur d'énergie, comprenant un piston 24 coulissant dans le corps du vérin 3 et solidaire d'une tige 4 qui est en appui à une extrémité contre la masse reculante 1a de l'arme 1.According to the invention, there is provided an energy recovery device 2 which is connected to the nitrogen chamber 10 and actuated by the recoil of the weapon. This device is represented on the lower part of the figure 1 . For this purpose, the device comprises a cylinder 3 recovery rod of energy, comprising a piston 24 sliding in the body of the cylinder 3 and secured to a rod 4 which is supported at one end against the recoil mass 1a of the weapon 1.

Ce piston 24 délimite une première chambre 6 et une deuxième chambre 5. La deuxième chambre 5 du vérin 3 est en communication avec la chambre d'azote 10 et contient donc elle aussi de l'azote. La première chambre 6 est en communication avec un ensemble accumulateur de fluide 25.This piston 24 defines a first chamber 6 and a second chamber 5. The second chamber 5 of the cylinder 3 is in communication with the nitrogen chamber 10 and therefore also contains nitrogen. The first chamber 6 is in communication with a fluid accumulator assembly 25.

L'ensemble 25 comprend d'une part un accumulateur de gavage 15 et d'autre part un accumulateur de stockage 16.The assembly 25 comprises on the one hand a booster accumulator 15 and on the other hand a storage accumulator 16.

L'accumulateur 15 peut être alimenté en huile par une canalisation 26 conduisant le retour de l'huile provenant des différents actionneurs du circuit hydraulique (non représentés). L'accumulateur pourra également être alimenté à l'aide d'un moteur pompe 18. L'accumulateur de gavage 15 est un accumulateur basse pression (pression de l'ordre de 3 105 Pa à 106 Pa).The accumulator 15 can be supplied with oil through a pipe 26 leading the return of the oil from the various actuators of the hydraulic circuit (not shown). The accumulator may also be powered by a pump motor 18. The booster accumulator 15 is a low pressure accumulator (pressure of the order of 3 10 5 Pa to 10 6 Pa).

L'accumulateur de stockage 16 se présente sous la forme d'un réservoir d'huile sous pression qui est destiné à alimenter un ou plusieurs appareils (non représentés) par l'intermédiaire d'une canalisation 27 de service.The storage accumulator 16 is in the form of a pressurized oil reservoir which is intended to supply one or more devices (not shown) via a service line 27.

L'accumulateur de stockage 16 est un accumulateur haute pression (pression de l'ordre de 1,5 107 Pa à 2,5 107 Pa).The storage accumulator 16 is a high pressure accumulator (pressure of the order of 1.5 × 10 7 Pa at 2.5 × 10 7 Pa).

La chambre 6 du vérin 3 communique avec l'ensemble 25 par une canalisation principale 19 qui se divise en deux branches 11 et 12 munies chacune d'un clapet anti-retour, respectivement 13 et 14. Le clapet 13 permet le passage du fluide comprimé uniquement de l'accumulateur de gavage 15 vers le vérin 3. Le clapet 14 permet uniquement l'alimentation de l'accumulateur de stockage 16 en fluide comprimé à partir du piston 3 (la basse pression de l'accumulateur de gavage 15 étant toujours inférieure à la haute pression de l'accumulateur de stockage 16).The chamber 6 of the jack 3 communicates with the assembly 25 by a main pipe 19 which is divided into two branches 11 and 12 each provided with a non-return valve, respectively 13 and 14. The valve 13 allows the passage of compressed fluid only the booster accumulator 15 to the cylinder 3. The valve 14 only allows the supply of the storage accumulator 16 compressed fluid from the piston 3 (the low pressure of the booster accumulator 15 is always lower at the high pressure of the storage accumulator 16).

Le fluide comprimé peut être de façon classique de l'huile. Chaque accumulateur 15 ou 16 comportera d'une façon classique et non représentée une chambre à gaz isolée du fluide par une membrane et permettant la pressurisation de l'accumulateur.The compressed fluid can be conventionally oil. Each accumulator 15 or 16 will comprise in a conventional manner and not shown a gas chamber isolated from the fluid by a membrane and allowing the pressurization of the accumulator.

La figure 2 illustre le dispositif selon l'invention au cours d'une étape intermédiaire de la phase de recul de l'arme, c'est-à-dire la phase de récupération d'énergie, la position finale de l'arme n'étant pas représentée car n'étant pas nécessaire à la compréhension du fonctionnement.The figure 2 illustrates the device according to the invention during an intermediate step of the recoil phase of the weapon, that is to say the energy recovery phase, the final position of the weapon not being shown because it is not necessary for understanding the operation.

La masse reculante de l'arme 1 a reculé d'une certaine distance suivant la flèche F2 en entraînant avec elle la tige 21 du vérin 9. Le lien élastique 20 remplit sa fonction et le fluide contenu dans la chambre 23 est refoulé dans la chambre 22 ce qui provoque la compression de l'azote contenu dans la chambre 10. La pression de l'azote dans la chambre 5 s'accroît de manière concomitante et repousse le piston 24 du récupérateur 3, ce qui refoule l'huile contenue dans la première chambre 6. Cette huile sous pression est conduite, par l'intermédiaire du clapet 14, dans l'accumulateur de stockage 16 à haute pression. On a donc récupéré une partie de l'énergie produite par le recul de l'arme. Cette énergie est disponible dans l'accumulateur 16 pour être utilisée à tout moment par exemple par l'intermédiaire d'une canalisation 27.The recoil mass of the weapon 1 has moved back a certain distance along the arrow F2 by driving with it the rod 21 of the cylinder 9. The elastic link 20 fulfills its function and the fluid contained in the chamber 23 is forced back into the chamber 22 which causes the compression of the nitrogen contained in the chamber 10. The pressure of the nitrogen in the chamber 5 increases concomitantly and pushes the piston 24 of the recuperator 3, which forces the oil contained in the first chamber 6. This pressurized oil is led through the valve 14 into the storage tank 16 at high pressure. So we recovered some of the energy produced by the recoil of the weapon. This energy is available in the accumulator 16 to be used at any time, for example via a pipe 27.

La figure 3 montre le dispositif suivant l'invention lors de la phase de rentrée en batterie de l'arme. C'est la pression de l'azote contenu dans la chambre 10 qui, comme indiqué succinctement ci-dessus, provoque ce mouvement de retour en batterie de l'arme. La masse reculante de l'arme 1 repousse alors la tige 4 du vérin 3 (donc le piston 24) et la ramène dans sa position initiale comme représenté sur la figure 1. Ce mouvement de retour du piston 24 entraîne une dépression d'huile dans la canalisation principale 19 ce qui a pour effet d'ouvrir le clapet 13 et l'accumulateur de gavage 15 assure le remplissage en huile de la première chambre 6 du vérin 3. Le clapet 14 reste fermé par la haute pression du récupérateur de stockage 16 qui est supérieure à la pression fournie par l'accumulateur de gavage 15.The figure 3 shows the device according to the invention during the battery return phase of the weapon. It is the pressure of the nitrogen contained in the chamber 10 which, as indicated succinctly above, causes this movement back to the battery of the weapon. The recoil mass of the weapon 1 then pushes the rod 4 of the cylinder 3 (and thus the piston 24) and returns it to its initial position as shown in FIG. figure 1 . This return movement of the piston 24 causes a depression of oil in the main pipe 19 which has the effect of opening the valve 13 and the booster accumulator 15 ensures the oil filling of the first chamber 6 of the cylinder 3. The valve 14 remains closed by the high pressure of the storage recuperator 16 which is greater than the pressure supplied by the booster accumulator 15.

La figure 4 illustre une variante du dispositif de récupération selon l'invention.The figure 4 illustrates a variant of the recovery device according to the invention.

Dans cet exemple, la deuxième chambre 5 du vérin récupérateur 3 est reliée au lien élastique 20 par l'intermédiaire d'un circuit d'huile comprenant une canalisation 29. Ce circuit d'huile est délimité du côté de la chambre d'azote 10 du lien élastique 20 par un deuxième piston libre 17 qui isole l'azote et le circuit d'huile.In this example, the second chamber 5 of the recovery cylinder 3 is connected to the elastic link 20 by via an oil circuit comprising a pipe 29. This oil circuit is delimited on the side of the nitrogen chamber 10 of the elastic link 20 by a second free piston 17 which isolates the nitrogen and the fuel system. 'oil.

La chambre 10 contenant l'azote ne communique plus avec la deuxième chambre 5 du vérin récupérateur 3.The chamber 10 containing the nitrogen no longer communicates with the second chamber 5 of the recovery cylinder 3.

Le piston 17 porte une tige 31 dont la sortie hors du lien élastique 20, permet de visualiser le remplissage en huile du système. Le principe de fonctionnement reste globalement le même, la pression d'azote s'applique alors au piston 24 du vérin récupérateur 3 par l'intermédiaire d'un autre fluide.The piston 17 carries a rod 31, the output of the elastic link 20, to visualize the oil filling of the system. The operating principle remains generally the same, the nitrogen pressure then applies to the piston 24 of the recovery cylinder 3 via another fluid.

Ce mode de réalisation présente comme avantage d'être plus sûr. En effet si une rupture de la canalisation 29 intervient par accident, il n'y a pas de fuite d'azote et le lien élastique 20 reste fonctionnel. Les tirs restent donc possibles.This embodiment has the advantage of being safer. Indeed, if a rupture of the pipe 29 occurs by accident, there is no leakage of nitrogen and the elastic link 20 remains functional. Shots therefore remain possible.

La figure 5 illustre une autre variante de réalisation du dispositif de récupération selon l'invention.The figure 5 illustrates another variant embodiment of the recovery device according to the invention.

Dans cet exemple, la deuxième chambre 5 du vérin récupérateur 3 est reliée à la chambre d'huile 22 du lien élastique 20 de l'arme par l'intermédiaire d'une canalisation 30. Ainsi lors du recul de l'arme 1, l'huile est poussée de la chambre 23 vers la chambre 22 et donc vers la deuxième chambre 5 du vérin récupérateur 3. Pendant la phase de rentrée en batterie, la pression d'azote de la chambre 10 ramène en batterie la masse reculante de l'arme. La masse reculante repousse la tige 4 et la dépression d'huile qui en résulte dans la canalisation principale 19 provoque la ré-alimentation en huile du circuit par l'accumulateur de gavage 15. D'autres variantes sont bien entendu possible sans pour autant sortir du cadre de l'invention.In this example, the second chamber 5 of the recovery cylinder 3 is connected to the oil chamber 22 of the elastic linkage 20 of the weapon via a pipe 30. Thus during the recoil of the weapon 1, the oil is pushed from the chamber 23 to the chamber 22 and thus to the second chamber 5 of the recovery cylinder 3. During the battery re-entry phase, the nitrogen pressure of the chamber 10 brings back in battery the recoil mass of the armed. The recoil mass pushes the rod 4 and the oil depression that results in the main pipe 19 causes the oil re-supply of the circuit by the booster accumulator 15. Other variants are of course possible without leaving out of the scope of the invention.

Dans toutes les figures précédentes, le circuit hydraulique est représenté schématiquement. Les dimensions et proportions relatives des différents composants ne sont donc pas respectées.In all the previous figures, the hydraulic circuit is shown schematically. The dimensions and relative proportions of the various components are therefore not respected.

Il est bien entendu que ce circuit comporte également les organes de contrôle et sécurités habituels tels que manomètres et soupapes de surpression.It is understood that this circuit also includes the usual control and safety devices such as manometers and pressure relief valves.

Claims (7)

  1. A device (2) to recuperate the energy produced during the recoiling of a weapon (1), comprising an energy recuperator cylinder (3) activated by the recoil of the weapon, a double-acting cylinder comprising a first (6) and a second chambers (5) separated by a piston (24), the first chamber (6) of the cylinder being connected to a hydraulic power circuit of the weapon, characterised in that the piston (24) of said cylinder (3) pushes the hydraulic fluid in this circuit into a storage accumulator (16) when the weapon recoils, the second chamber (5) being connected to a recoil mechanism (20) that ensures its pressurising energy recuperating cylinder (3) during the recoil of the weapon, the recuperator cylinder incorporating a rod (4) integral with the piston (24), such rod being pushed by the weapon (1) during its counter recoil.
  2. A device to recuperate the energy produced during the recoiling of a weapon (1) according to Claim 1, characterised in that the energy recuperator cylinder (3) is connected to the weapon's hydraulic power circuit by means of main piping (19) divided into at least two secondary pipings (11, 12) provided with first (13) and second (14) valves allowing the passage of a fluid in one direction only, one secondary piping (12) connecting the main piping to the storage accumulator (16) and another secondary piping (11) connecting the main piping to a supercharging accumulator (15).
  3. A device according to Claim 2, characterised in that the first valve (13) is placed between the supercharging accumulator (15) and the main piping (19), and the second valve (14) is placed between the main piping (19) and the storage accumulator (16), the first valve (13) being closed and the second valve (14) open when the weapon recoils.
  4. A device according to one of Claims 1 to 3, characterised in that the storage accumulator (16) supplies the weapon's hydraulic network with pressurised fluid via service piping (27).
  5. An energy recuperation device according to one of Claims 1 to 3, characterised in that the second chamber (5) of the recuperator cylinder (3) is connected to the nitrogen chamber (10) of the recoil mechanism (20).
  6. An energy recuperation device according to one of Claims 1 to 3, characterised in that the second chamber (5) of the recuperator cylinder (3) is connected to the recoil mechanism (20) via an oil circuit (29) delimited on the nitrogen chamber (10) side of the recoil mechanism (20) by a free piston (17) which separates the nitrogen and the oil circuit (29).
  7. An energy recuperation device according to any one of Claims 1 to 3, characterised in that the second chamber (5) of the recuperator cylinder (3) is connected to the oil chamber (22) of the recoil mechanism (20).
EP04290759A 2003-04-03 2004-03-22 Device for recovering energy produced during the recoil of a weapon Expired - Lifetime EP1464912B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04290759T PL1464912T3 (en) 2003-04-03 2004-03-22 Device for recovering energy produced during the recoil of a weapon

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0304163 2003-04-03
FR0304163A FR2853408B1 (en) 2003-04-03 2003-04-03 DEVICE FOR RECOVERING THE ENERGY PRODUCED BY THE REVERSE OF AN ARMY

Publications (2)

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EP1464912A1 EP1464912A1 (en) 2004-10-06
EP1464912B1 true EP1464912B1 (en) 2010-07-14

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EP04290759A Expired - Lifetime EP1464912B1 (en) 2003-04-03 2004-03-22 Device for recovering energy produced during the recoil of a weapon

Country Status (7)

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US (1) US7258056B2 (en)
EP (1) EP1464912B1 (en)
AT (1) ATE474201T1 (en)
DE (1) DE602004028068D1 (en)
ES (1) ES2348869T3 (en)
FR (1) FR2853408B1 (en)
PL (1) PL1464912T3 (en)

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US7594465B2 (en) * 2003-03-07 2009-09-29 Bae Systems Land & Armaments L.P. In bore air regulation system
DE102010051651A1 (en) * 2010-11-17 2012-05-24 Liebherr-Hydraulikbagger Gmbh implement
US9097475B2 (en) 2012-12-05 2015-08-04 Ra Brands, L.L.C. Gas-operated firearm with pressure compensating gas piston
US9383149B2 (en) 2012-12-05 2016-07-05 Ra Brands, L.L.C. Gas-operated firearm with pressure compensating gas piston
US9212856B2 (en) 2012-12-26 2015-12-15 Ra Brands, L.L.C. Gas cut-off system for firearms
US8887616B2 (en) 2013-01-11 2014-11-18 Ra Brands, L.L.C. Auto regulating gas system for supressed weapons
US8950313B2 (en) 2013-01-04 2015-02-10 Ra Brands, L.L.C. Self regulating gas system for suppressed weapons
US9500423B2 (en) 2014-01-24 2016-11-22 Ra Brands, L.L.C. Method and mechanism for automatic regulation of gas flow when mounting a suppressor to a firearm
US10823523B1 (en) * 2019-09-25 2020-11-03 Mandus Group Llc Temperature compensator for artillery system
EP4379307A1 (en) * 2022-11-30 2024-06-05 BAE SYSTEMS plc Artillery weapon
CN115930673A (en) * 2022-11-30 2023-04-07 山西北方机械制造有限责任公司 Two-way high-pressure gas storage device
GB2624907A (en) * 2022-11-30 2024-06-05 Bae Systems Plc Artillery weapon
WO2024115876A1 (en) * 2022-11-30 2024-06-06 Bae Systems Plc Artillery weapon

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Also Published As

Publication number Publication date
ES2348869T3 (en) 2010-12-16
DE602004028068D1 (en) 2010-08-26
ATE474201T1 (en) 2010-07-15
US7258056B2 (en) 2007-08-21
PL1464912T3 (en) 2010-12-31
FR2853408A1 (en) 2004-10-08
EP1464912A1 (en) 2004-10-06
FR2853408B1 (en) 2007-11-30
US20040216598A1 (en) 2004-11-04

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