EP0313856A1 - Mechanism for cooling the interior of a gun barrel - Google Patents

Mechanism for cooling the interior of a gun barrel Download PDF

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Publication number
EP0313856A1
EP0313856A1 EP88116172A EP88116172A EP0313856A1 EP 0313856 A1 EP0313856 A1 EP 0313856A1 EP 88116172 A EP88116172 A EP 88116172A EP 88116172 A EP88116172 A EP 88116172A EP 0313856 A1 EP0313856 A1 EP 0313856A1
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EP
European Patent Office
Prior art keywords
coolant
piston
barrel
interior
gun barrel
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Granted
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EP88116172A
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German (de)
French (fr)
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EP0313856B1 (en
Inventor
Ernst Hürlemann
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Rheinmetall Air Defence AG
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Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Oerlikon Contraves AG
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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
    • F41A13/00—Cooling or heating systems; Blowing-through of gun barrels; Ventilating systems
    • F41A13/04—Injecting fluids into barrels or cartridge chambers

Definitions

  • the invention relates to a device for cooling the inner tube wall of a weapon barrel of a firearm, with at least one coolant channel for injecting coolant into the rear of the weapon barrel end and with means for metering the coolant supply, the coolant channel being located in the weapon barrel wall and opening into the inner tube wall.
  • a slide which can be actuated by the propellant gas pressure is provided for opening and closing the coolant channel. After a projectile has been fired, the slide gas is opened by the propellant gas pressure via a piston and a piston rod, so that coolant can flow through the coolant channel into the interior of the weapon barrel.
  • the injection pressure required to inject the coolant is generated by a coolant pump, not shown.
  • This known device has the disadvantage that an additional coolant pump is required and that it is practically not possible to use such a pump to generate the pressure required to inject the coolant.
  • Another cooling device for the weapon barrel of an automatic firearm and high-performance cannon is known (DE-A-3145764).
  • This cooling device has in the barrel of the weapon radially branched from a cooling channel in the drum axis cooling channels which are connected to nozzles which open freely into the rear end of the gun barrel.
  • the control of the The injection process takes place depending on the drum rotation, through shut-off devices inserted into the cooling channels, such as slides or valves with valve lifters and valve disks.
  • the injection of the coolant is thus carried out only while the nozzles slide past the weapon barrel, the coolant being sprayed directly onto the core surface of the weapon barrel.
  • This known cooling device has the disadvantage that it can only be used with a firearm with a drum and can only inject cooling liquid for a very short time.
  • An air cooling device is known (see CH-PS-221'036), in which cooling channels are provided in movable closure parts. These channels open on the one hand into a chamber arranged behind the breech and on the other hand against the cartridge chamber in the barrel, these channels having the smallest cross section at the mouth directed against the cartridge chamber.
  • This latter cooling device for the weapon barrel of a firearm has the disadvantage that it is more suitable for air cooling than for liquid cooling and the air can only dissipate relatively little heat.
  • the object to be achieved with the present invention is to provide a cooling device for the weapon barrel of a firearm, which is suitable for various weapons special control elements required, generates a high coolant pressure and ensures high heat dissipation on the inside of the gun barrel wall.
  • the cooling device with which this object is achieved is characterized in that a device which can be actuated by the propellant gas pressure is arranged on the weapon barrel for injecting a metered amount of cooling liquid at the required pressure.
  • FIG. 1 An embodiment of the cooling device according to the invention for the weapon barrel of a firearm is described in detail below with reference to the accompanying drawing.
  • the single figure shows a longitudinal section through a weapon barrel with a device for injecting coolant into the interior of the weapon barrel.
  • the rear end 10 of a weapon barrel 11 has a cartridge chamber 12 which is located behind the inner tube wall 13, which is also referred to as a barrel core.
  • a cartridge 14 which consists of a cartridge case 15 and a projectile 16.
  • the cartridge case 15 has a sleeve neck 18 in front of its shoulder 17, in which the projectile 16 is held.
  • the shape of the cartridge chamber 12 corresponds to the shape of the cartridge case 15, such that the shoulder 17 of the cartridge case 15 bears against a conical section 19 of the cartridge chamber 12.
  • At least one coolant channel 23, which is located in the tube wall 26, opens into the tube inner wall 13 in front of the sleeve neck 18.
  • a housing 27 is fastened to this tube wall 26 by means of screws 25.
  • this housing 27 there is the device according to the invention for injecting coolant into the interior of the pipe 13 through the coolant channel 23 mentioned.
  • This housing 27 has three bores 28, 29 and 30 through which the coolant enters the coolant channel 23.
  • a first check valve 31 is connected to the bore 30 connected, which has a ball 32 which is loaded by a spring 33.
  • This check valve 31 prevents coolant from flowing back through the pressure of the propellant gases inside the weapon barrel 11 through the coolant channel 23 and the bores 28, 29 and 30.
  • a second check valve 34 is arranged, which has a ball 35 which is loaded by a spring 36.
  • This second check valve 34 prevents coolant from flowing back into a coolant reservoir 37 when the coolant is injected into the interior of the pipe 13 through the bores 30, 29 and 28, through the injection pump described below, which is also described below.
  • a first cylinder 38 is screwed into the housing 27 and has an external thread 39 which is screwed into a threaded bore 40 of the housing 27.
  • this cylinder 38 there is a piston 41 which is fastened to a piston rod 42 which has a head 43.
  • a spring 44 which is supported on the one hand on a screw head 45 of the cylinder 38 and on the other hand on the piston rod head 43, tends to pull the piston 41 out of the cylinder 38.
  • the piston rod head 43 is supported on a second cylinder 46 which is fastened to the weapon barrel 11 with the aid of a carrier 47. This support 47 is shrunk onto the weapon barrel 11 and has two bores 48 and 49 which open into corresponding gas extraction channels 50 and 51 of the weapon barrel 11.
  • the other gas extraction channel 50 serves to supply propellant gas to the cooling device of the weapon barrel.
  • the propellant gas passes from the tube interior 13 through the gas extraction channel 50, the bore 48 of the Carrier 47 in a bore 52 at the front end of the second cylinder 46, and from this bore 52 into the interior 53 of the cylinder 46.
  • Inside the cylinder 46 there is a piston 54 which is attached to a piston rod 55 which is on the mentioned head 43 of the other piston rod 42 supports.
  • the piston rod 55 is surrounded by a number of spring washers 56 which form an annular spring assembly which serves to catch the piston 54 when it is suddenly pushed backwards by the propellant gases, as seen in the firing direction of the weapon.
  • the coolant container 37 there is a displaceable piston 57, to which a piston rod 58 is fastened, which penetrates a cover 59 of the container 37.
  • This piston rod 58 is surrounded by one or two coil springs 60, 61, which are supported on the one hand on the piston 57 and on the other hand on the cover 59 and have the endeavor to press the piston 57 against the coolant in the space 62, as a result of which the latter is forced out of the space 62 into a bore 63 and via the check valve 34 into the chamber 64 of the cylinder 41.
  • the coolant container 37 has an external thread 65 which is screwed into an internal thread 66 of the housing 27. Furthermore, a line 67 is screwed into the housing 27, through which cooling liquid can also get into the bore 63.
  • This coolant is in a container, not shown, and is under atmospheric pressure.
  • a propellant gas pressure forms inside the weapon barrel 11 behind this cartridge 14. If the propellant gas should penetrate into the coolant channel 23 and the bores 28, 29 and 30, the check valve 31 prevents propellant gas from entering the Chamber 64 of the cylinder 38 arrives. As soon as the projectile 16 is in front of the gas extraction channel 50, the propellant gas flows through this gas extraction channel 50, through the bore 48 of the carrier 47, through the bore 52 of the cylinder 46 and reaches the interior 53 of the cylinder 46.
  • the piston 54 As soon as propellant gas enters the interior 53 of the cylinder 46 arrives, the piston 54, viewed in the firing direction of the weapon, is pushed backwards and abuts against the ring spring assembly consisting of the spring rings 56, which catches the piston 54 and destroys a large part of the energy which the propellant gas transmits to the piston 54 Has.
  • the piston 54 abuts with the piston rod 55 against the head 43 of the piston rod 42, so that the piston 41 attached to the piston rod 42, also seen in the firing direction of the weapon, is pushed backwards.
  • a number of channels can be arranged evenly distributed around the circumference of the weapon barrel.
  • a further ring of Coolant channels 23 may be arranged, which are not shown in the drawing.
  • coolant for example compressed air
  • coolant can also be used instead of coolant.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)

Abstract

Um die Rohrinnenwand (13) eines Waffenrohres (11) am hinteren Waffenrohrende (10) zu kühlen, sind in der Rohrwand (26) des Waffenrohres (11) Kühlflüssigkeitskanäle (23) angeordnet, welche in die Rohrinnenwand (13) münden. Mit Hilfe einer Vorrichtung, die durch den Gasdruck betätigbar ist, wird eine dosierte Kühlflüssigkeitsmenge nach jedem Schuss ins Rohrinnere eingespritzt. Diese Vorrichtung weist vorzugsweise eine Kolbenanordnung auf, mit einem ersten, vom Gasdruck beaufschlagten Kolben (54) von grösserem Durchmesser, sowie einem zweiten, vom Kühlmittel beaufschlagten Kolben (41) von kleinerem Durchmesser.In order to cool the inner tube wall (13) of a weapon barrel (11) at the rear weapon barrel end (10), coolant channels (23) are arranged in the tube wall (26) of the weapon barrel (11), which open into the inner tube wall (13). With the help of a device which can be actuated by the gas pressure, a metered amount of coolant is injected into the interior of the pipe after each shot. This device preferably has a piston arrangement with a first piston (54) of larger diameter, which is acted upon by gas pressure, and a second piston (41), which is acted upon by the coolant, of smaller diameter.

Description

Die Erfindung betrifft eine Einrichtung zum Kühlen der Rohrinnenwand eines Waffenrohres einer Feuerwaffe, mit mindestens einem Kühlflüssigkeitskanal zum Einspritzen von Kühlflüssigkeit ins Innere des hinteren Waffenrohrendes und mit Mitteln zum Dosieren der Kühlmittelzufuhr, wobei sich der Kühlflüssigkeitskanal in der Waffenrohrwand befindet und in die Rohrinnenwand mündet.The invention relates to a device for cooling the inner tube wall of a weapon barrel of a firearm, with at least one coolant channel for injecting coolant into the rear of the weapon barrel end and with means for metering the coolant supply, the coolant channel being located in the weapon barrel wall and opening into the inner tube wall.

Bei einer bekannten Einrichtungen dieser Art (siehe US-PS 2,641,162)(Balleisen) ist ein durch den Treibgasdruck betätigbarer Schieber vorgesehen zum Öffnen und Schliessen des Kühlflüssigkeitskanales. Nach dem Abfeuern eines Geschosses wird durch den Treibgasdruck über einen Kolben und eine Kolbenstange der Schieber geöffnet, so dass Kühlflüssigkeit durch den Kühlflüssigkeitskanal ins Innere des Waffenrohres fliessen kann. Der zum Einspritzen der Kühlflüssigkeit erforderliche Einspritzdruck wird durch eine nicht dargestellte Kühlflüssigkeitspumpe erzeugt.In a known device of this type (see US Pat. No. 2,641,162) (ball iron), a slide which can be actuated by the propellant gas pressure is provided for opening and closing the coolant channel. After a projectile has been fired, the slide gas is opened by the propellant gas pressure via a piston and a piston rod, so that coolant can flow through the coolant channel into the interior of the weapon barrel. The injection pressure required to inject the coolant is generated by a coolant pump, not shown.

Diese bekannte Vorrichtung hat den Nachteil, dass eine zusätzliche Kühlflüssigkeitspumpe erforderlich ist und dass es praktisch nicht möglich ist, mit einer solchen Pumpe den zum Einspritzen der Kühlflüssigkeit erforderlichen Druck zu erzeugen.This known device has the disadvantage that an additional coolant pump is required and that it is practically not possible to use such a pump to generate the pressure required to inject the coolant.

Es ist eine andere Kühlvorrichtung für das Waffenrohr einer automatischen Feuerwaffe und Hochleistungskanone bekannt (DE-A-3145764). Diese Kühlvorrichtung besitzt in der Trommel der Waffe radial von einem Kühlkanal in der Trommelachse abgezweigte Kühlkanäle, die mit Düsen verbunden sind, welche frei in das rückwärtige Ende des Waffenrohres einmünden. Die Steuerung des Einspritzvorganges erfolgt in Abhängigkeit der Trommeldrehung, durch in die Kühlkanäle eingesetzte Absperrorgane, wie Schieber oder Ventile mit Ventilstössel und Ventilteller. Das Einspritzen der Kühlflüssigkeit wird dadurch nur während des Vorbeigleitens der Düsen am Waffenrohr vorgenommen, wobei die Kühlflüssigkeit direkt auf die Seelenoberfläche des Waffenrohres gespritzt wird. Diese bekannte Kühleinrichtung hat den Nachteil, dass sie nur bei einer Feuerwaffe mit Trommel anwendbar ist und nur während einer sehr kurzen Zeit Kühlflüssigkeit einspritzen kann.Another cooling device for the weapon barrel of an automatic firearm and high-performance cannon is known (DE-A-3145764). This cooling device has in the barrel of the weapon radially branched from a cooling channel in the drum axis cooling channels which are connected to nozzles which open freely into the rear end of the gun barrel. The control of the The injection process takes place depending on the drum rotation, through shut-off devices inserted into the cooling channels, such as slides or valves with valve lifters and valve disks. The injection of the coolant is thus carried out only while the nozzles slide past the weapon barrel, the coolant being sprayed directly onto the core surface of the weapon barrel. This known cooling device has the disadvantage that it can only be used with a firearm with a drum and can only inject cooling liquid for a very short time.

Es ist eine Luftkühleinrichtung bekannt (siehe CH-PS-­221′036), bei welcher in bewegbaren Verschlussteilen Kühlkanäle vorgesehen sind. Diese Kanäle münden einerseits in eine hinter dem Verschluss angeordnete Kammer und andererseits gegen das Patronenlager im Lauf, wobei diese Kanäle an der gegen das Patronenlager gerichteten Mündung den kleinsten Querschnitt aufweisen. Diese letzgenannte Kühleinrichtung für das Waffenrohr einer Feuerwaffe hat den Nachteil, dass sie mehr für Luftkühlung statt für Flüssigkeitskühlung geeignet ist und die Luft nur relativ wenig Wärme abführen kann.An air cooling device is known (see CH-PS-221'036), in which cooling channels are provided in movable closure parts. These channels open on the one hand into a chamber arranged behind the breech and on the other hand against the cartridge chamber in the barrel, these channels having the smallest cross section at the mouth directed against the cartridge chamber. This latter cooling device for the weapon barrel of a firearm has the disadvantage that it is more suitable for air cooling than for liquid cooling and the air can only dissipate relatively little heat.

Es ist eine Rohr-Kühleinrichtung bekannt (siehe FR-PS-­1′112′677), bei welcher durch den Rücklauf des Waffenrohres gegenüber der Lafette ein Kolben in einem Zylinder verschoben wird und dadurch eine gewisse Kühlmittelmenge in das Innere des Waffenrohres eingespritzt wird. Diese Vorrichtung hat den Nachteil, dass sie bei gewissen Waffen nicht anwendbar ist.There is a tube cooling device is known (see FR-PS-1'112'677), in which a piston in a cylinder is displaced by the return of the gun barrel relative to the carriage and thereby a certain amount of coolant is injected into the interior of the gun barrel. This device has the disadvantage that it cannot be used with certain weapons.

Die Aufgabe, welche mit der vorliegenden Erfindung gelöst werden soll, besteht in der Schaffung einer Kühleinrichtung, für das Waffenrohr einer Feuerwaffe, welche sich für verschiedene Waffen eignet, keine besonderen Steuerorgane benötigt, einen hohen Kühlmitteldruck erzeugt und eine hohe Wärmeabfuhr an der Waffenrohr-Innenwand gewährleistet. Die Kühleinrichtung, mit der diese Aufgabe gelöst wird, ist dadurch gekennzeichnet, dass eine vom Treibgasdruck betätigbare Vorrichtung am Waffenrohr angeordnet ist zum Einspritzen einer dosierten Menge Kühlflüssigkeit mit dem erforderlichen Druck.The object to be achieved with the present invention is to provide a cooling device for the weapon barrel of a firearm, which is suitable for various weapons special control elements required, generates a high coolant pressure and ensures high heat dissipation on the inside of the gun barrel wall. The cooling device with which this object is achieved is characterized in that a device which can be actuated by the propellant gas pressure is arranged on the weapon barrel for injecting a metered amount of cooling liquid at the required pressure.

Ein Ausführungsbeispiel der erfindungsgemässen Kühleinrichtung für das Waffenrohr einer Feuerwaffe ist im folgenden anhand der beigefügten Zeichnung ausführlich beschrieben. Die einzige Figur zeigt einen Längsschnitt durch ein Waffenrohr mit einer Vorrichtung zum Einspritzen von Kühlmittel ins Innere des Waffenrohres.An embodiment of the cooling device according to the invention for the weapon barrel of a firearm is described in detail below with reference to the accompanying drawing. The single figure shows a longitudinal section through a weapon barrel with a device for injecting coolant into the interior of the weapon barrel.

Gemäss der einzigen Figur weist das hintere Ende 10 eines Waffenrohres 11 eine Patronenkammer 12 auf, die sich hinter der Rohrinnenwand 13 befindet, das auch als Rohrseele bezeichnet wird. In dieser Patronenkammer 12 befindet sich eine Patrone 14, die aus einer Patronenhülse 15 und einem Geschoss 16 besteht. Die Patronenhülse 15 weist vor ihrer Schulter 17 einen Hülsenhals 18 auf, in welchem das Geschoss 16 gehalten ist. Die Form der Patronenkammer 12 entspricht der Form der Patronenhülse 15, derart, dass die Schulter 17 der Patronenhülse 15 an einem konischen Abschnitt 19 der Patronenkammer 12 anliegt. Vor dem Hülsenhals 18 mündet mindestens ein Kühlflüssigkeitskanal 23 in die Rohrinnenwand 13, der sich in der Rohrwand 26 befindet. An dieser Rohrwand 26 ist ein Gehäuse 27 mit Hilfe von Schrauben 25 befestigt. In diesem Gehäuse 27 befindet sich die erfindungsgemässe Vorrichtung zum Einspritzen von Kühlflüssigkeit ins Rohrinnere 13 durch den erwähnten Kühlflüssigkeitskanal 23. Dieses Gehäuse 27 weist drei Bohrungen 28, 29 und 30 auf, durch welche die Kühlflüssigkeit in den Kühlflüssigkeitskanal 23 gelangt. An die Bohrung 30 ist ein erstes Rückschlagventil 31 angeschlossen, welches eine Kugel 32 aufweist, die von einer Feder 33 belastet ist. Dieses Rückschlagventil 31 verhindert, dass Kühlflüssigkeit durch den Druck der Treibgase im Innern 13 des Waffenrohres 11 durch den Kühlflüssigkeitskanal 23 und die Bohrungen 28, 29 und 30 zurückfliessen kann. Neben dem ersten Rückschlagventil 31 ist ein zweites Rückschlagventil 34 angeordnet, das eine Kugel 35 aufweist, die von einer Feder 36 belastet ist.According to the single figure, the rear end 10 of a weapon barrel 11 has a cartridge chamber 12 which is located behind the inner tube wall 13, which is also referred to as a barrel core. In this cartridge chamber 12 there is a cartridge 14 which consists of a cartridge case 15 and a projectile 16. The cartridge case 15 has a sleeve neck 18 in front of its shoulder 17, in which the projectile 16 is held. The shape of the cartridge chamber 12 corresponds to the shape of the cartridge case 15, such that the shoulder 17 of the cartridge case 15 bears against a conical section 19 of the cartridge chamber 12. At least one coolant channel 23, which is located in the tube wall 26, opens into the tube inner wall 13 in front of the sleeve neck 18. A housing 27 is fastened to this tube wall 26 by means of screws 25. In this housing 27 there is the device according to the invention for injecting coolant into the interior of the pipe 13 through the coolant channel 23 mentioned. This housing 27 has three bores 28, 29 and 30 through which the coolant enters the coolant channel 23. A first check valve 31 is connected to the bore 30 connected, which has a ball 32 which is loaded by a spring 33. This check valve 31 prevents coolant from flowing back through the pressure of the propellant gases inside the weapon barrel 11 through the coolant channel 23 and the bores 28, 29 and 30. In addition to the first check valve 31, a second check valve 34 is arranged, which has a ball 35 which is loaded by a spring 36.

Dieses zweite Rückschlagventil 34 verhindert, dass beim Einspritzen der Kühlflüssigkeit in das Rohrinnere 13 durch die Bohrungen 30, 29 und 28, durch die weiter unten beschriebene Einspritzpumpe, Kühlflüssigkeit in einen Kühlmittelbehälter 37 zurückfliesst, der ebenfalls weiter unten beschrieben ist.This second check valve 34 prevents coolant from flowing back into a coolant reservoir 37 when the coolant is injected into the interior of the pipe 13 through the bores 30, 29 and 28, through the injection pump described below, which is also described below.

In das Gehäuse 27 ist ein erster Zylinder 38 eingeschraubt, der ein Aussengewinde 39 aufweist, das in eine Gewindebohrung 40 des Gehäuses 27 eingeschraubt ist. In diesem Zylinder 38 befindet sich ein Kolben 41, der an einer Kolbenstange 42 befestigt ist, die einen Kopf 43 besitzt. Eine Feder 44, die sich einerseits an einem Schraubenkopf 45 des Zylinders 38 und andererseits am Kolbenstangenkopf 43 abstützt, hat das Bestreben, den Kolben 41 aus dem Zylinder 38 herauszuziehen. Der Kolbenstangenkopf 43 stützt sich auf einem zweiten Zylinder 46 ab, der mit Hilfe eines Trägers 47 am Waffenrohr 11 befestigt ist. Dieser Träger 47 ist auf das Waffenrohr 11 aufgeschrumpft und weist zwei Bohrungen 48 und 49 auf, welche in entsprechende Gasentnahmekanäle 50 und 51 des Waffenrohres 11 münden. Der eine Gasentnahmekanal 51 dient in an sich bekannter Weise zum Auslösen des nächsten Schusses und ist hier nicht näher beschrieben. Der andere Gasentnahmekanal 50 dient zum Zuführen von Treibgas zur Kühleinrichtung des Waffenrohres. Das Treibgas gelangt aus dem Rohrinneren 13 durch den Gasentnahmekanal 50, die Bohrung 48 des Trägers 47 in eine Bohrung 52 am vorderen Ende des zweiten Zylinders 46, und aus dieser Bohrung 52 ins Innere 53 des Zylinders 46. Im Innern 53 des Zylinders 46 befindet sich ein Kolben 54, der an einer Kolbenstange 55 befestigt ist, die sich auf dem erwähnten Kopf 43 der anderen Kolbenstange 42 abstützt. Die Kolbenstange 55 ist von einer Anzahl Federringen 56 umgeben, welche ein Ringfederpaket bilden, das zum Auffangen des Kolbens 54 dient, wenn dieser durch die Treibgase schlagartig, in Schussrichtung der Waffe gesehen, nach hinten geschoben wird.A first cylinder 38 is screwed into the housing 27 and has an external thread 39 which is screwed into a threaded bore 40 of the housing 27. In this cylinder 38 there is a piston 41 which is fastened to a piston rod 42 which has a head 43. A spring 44, which is supported on the one hand on a screw head 45 of the cylinder 38 and on the other hand on the piston rod head 43, tends to pull the piston 41 out of the cylinder 38. The piston rod head 43 is supported on a second cylinder 46 which is fastened to the weapon barrel 11 with the aid of a carrier 47. This support 47 is shrunk onto the weapon barrel 11 and has two bores 48 and 49 which open into corresponding gas extraction channels 50 and 51 of the weapon barrel 11. One gas extraction channel 51 is used in a manner known per se to trigger the next shot and is not described in more detail here. The other gas extraction channel 50 serves to supply propellant gas to the cooling device of the weapon barrel. The propellant gas passes from the tube interior 13 through the gas extraction channel 50, the bore 48 of the Carrier 47 in a bore 52 at the front end of the second cylinder 46, and from this bore 52 into the interior 53 of the cylinder 46. Inside the cylinder 46 there is a piston 54 which is attached to a piston rod 55 which is on the mentioned head 43 of the other piston rod 42 supports. The piston rod 55 is surrounded by a number of spring washers 56 which form an annular spring assembly which serves to catch the piston 54 when it is suddenly pushed backwards by the propellant gases, as seen in the firing direction of the weapon.

Im Kühlmittelbehälter 37 befindet sich ein verschiebbarer Kolben 57, an dem eine Kolbenstange 58 befestigt ist, welche einen Deckel 59 des Behälters 37 durchdringt. Diese Kolbenstange 58 ist von einer oder zwei Schraubenfedern 60,61 umgeben, welche sich einerseits am Kolben 57 und andererseits am Deckel 59 abstützen und das Bestreben haben, den Kolben 57 gegen die Kühlflüssigkeit im Raume 62 zu drücken, wodurch diese unter Druck aus dem Raume 62 in eine Bohrung 63 und über das Rückschlagventil 34 in die Kammer 64 des Zylinders 41. Der Kühlmittelbehälter 37 weist ein Aussengewinde 65 auf, das in ein Innengewinde 66 des Gehäuses 27 eingeschraubt ist. Ferner ist in das Gehäuse 27 noch eine Leitung 67 eingeschraubt, durch welche Kühlflüssigkeit ebenfalls in die Bohrung 63 gelangen kann. Diese Kühlflüssigkeit befindet sich in einem nicht dargestellten Behälter und steht unter Atmosphärendruck.In the coolant container 37 there is a displaceable piston 57, to which a piston rod 58 is fastened, which penetrates a cover 59 of the container 37. This piston rod 58 is surrounded by one or two coil springs 60, 61, which are supported on the one hand on the piston 57 and on the other hand on the cover 59 and have the endeavor to press the piston 57 against the coolant in the space 62, as a result of which the latter is forced out of the space 62 into a bore 63 and via the check valve 34 into the chamber 64 of the cylinder 41. The coolant container 37 has an external thread 65 which is screwed into an internal thread 66 of the housing 27. Furthermore, a line 67 is screwed into the housing 27, through which cooling liquid can also get into the bore 63. This coolant is in a container, not shown, and is under atmospheric pressure.

Die Wirkungsweise der beschriebenen Einrichtung zum Kühlen des Waffenrohres einer Feuerwaffe ist wie folgt:The operation of the described device for cooling the barrel of a firearm is as follows:

Beim Abfeuern der Patrone 14 bildet sich hinter dieser Patrone 14 ein Treibgasdruck im Innern des Waffenrohres 11. Falls das Treibgas in den Kühlflüssigkeitskanal 23 und die Bohrungen 28,29 und 30 eindringen sollte, so verhindert das Rückschlagventil 31, dass Treibgas in die Kammer 64 des Zylinders 38 gelangt. Sobald sich das Geschoss 16 vor dem Gasentnahmekanal 50 befindet, strömt das Treibgas durch diesen Gasentnahmekanal 50, durch die Bohrung 48 des Trägers 47, durch die Bohrung 52 des Zylinders 46 und gelangt ins Innere 53 des Zylinders 46. Sobald Treibgas ins Innere 53 des Zylinders 46 gelangt, wird der Kolben 54, in Schussrichtung der Waffe gesehen, nach hinten geschoben und stösst gegen das Ringfederpaket, bestehend aus den Federringen 56, welches den Kolben 54 auffängt und einen grossen Teil der Energie vernichtet, welche das Treibgas auf den Kolben 54 übertragen hat. Der Kolben 54 stösst dabei mit der Kolbenstange 55 gegen den Kopf 43 der Kolbenstange 42, sodass der an der Kolbenstange 42 befestigte Kolben 41, ebenfalls in Schussrichtung der Waffe gesehen, nach hinten geschoben wird. Durch diese Verschiebung des Kolbens 41 wird aus der Kammer 64 des Zylinders 38 Kühlflüssigkeit durch das Rückschlagventil 31 hindurch, durch die Bohrungen 30, 29 und 28 des Gehäuses 27, und durch den Kühlflüssgkeitskanal 23 ins Innere des Waffenrohres 11 eingespritzt. Bei der Verschiebung des Kolbens 41 mit der Kolbenstange 42 und dem Kopf 43 ist die Schraubenfeder 44 komprimiert worden. Sobald das Treibgas aus dem Inneren 53 des Zylinders 46 entweicht, ist die Schraubenfeder 44 in der Lage, die beiden Kolben 41 und 54 wieder in ihre Ausgangslage zurückzuschieben. Dabei wird Kühlflüssigkeit aus dem Kühlmittelbehälter 37 angesaugt und gelangt über das Rückschlagventil 34 in die Kammer 64 des Zylinders 38. Dieser Vorgang wiederholt sich bei jedem Schuss und somit wird das Innere des Waffenrohres 11 bei jedem Schuss durch Einspritzen von Kühlmittel abgekühlt.When the cartridge 14 is fired, a propellant gas pressure forms inside the weapon barrel 11 behind this cartridge 14. If the propellant gas should penetrate into the coolant channel 23 and the bores 28, 29 and 30, the check valve 31 prevents propellant gas from entering the Chamber 64 of the cylinder 38 arrives. As soon as the projectile 16 is in front of the gas extraction channel 50, the propellant gas flows through this gas extraction channel 50, through the bore 48 of the carrier 47, through the bore 52 of the cylinder 46 and reaches the interior 53 of the cylinder 46. As soon as propellant gas enters the interior 53 of the cylinder 46 arrives, the piston 54, viewed in the firing direction of the weapon, is pushed backwards and abuts against the ring spring assembly consisting of the spring rings 56, which catches the piston 54 and destroys a large part of the energy which the propellant gas transmits to the piston 54 Has. The piston 54 abuts with the piston rod 55 against the head 43 of the piston rod 42, so that the piston 41 attached to the piston rod 42, also seen in the firing direction of the weapon, is pushed backwards. As a result of this displacement of the piston 41, coolant is injected from the chamber 64 of the cylinder 38 through the check valve 31, through the bores 30, 29 and 28 of the housing 27, and through the coolant channel 23 into the interior of the weapon barrel 11. When the piston 41 is displaced with the piston rod 42 and the head 43, the coil spring 44 has been compressed. As soon as the propellant gas escapes from the interior 53 of the cylinder 46, the helical spring 44 is able to push the two pistons 41 and 54 back into their starting position. In this case, coolant is sucked out of the coolant container 37 and reaches the chamber 64 of the cylinder 38 via the check valve 34. This process is repeated with every shot and thus the interior of the weapon barrel 11 is cooled with every shot by injecting coolant.

Statt einem einzigen Kühlflüssigkeitskanal 23 können eine Anzahl von Kanälen gleichmässig am Umfang des Waffenrohres verteilt angeordnet sein. Statt einem einzigen Kranz von Kühlflüssigkeitskanälen 23 kann weiter vorne im Waffenrohr noch ein weiterer Kranz von Kühlflüssigkeitskanälen 23 angeordnet sein, welche jedoch in der Zeichnung nicht dargestellt sind.Instead of a single coolant channel 23, a number of channels can be arranged evenly distributed around the circumference of the weapon barrel. Instead of a single ring of coolant channels 23, a further ring of Coolant channels 23 may be arranged, which are not shown in the drawing.

Statt Kühlflüssigkeit kann auch ein anderes Kühlmittel, beispielsweise Druckluft verwendet werden.Another coolant, for example compressed air, can also be used instead of coolant.

Claims (6)

1. Einrichtung zum Kühlen der Rohrinnenwand (13) eines Waffenrohres (11) einer Feuerwaffe, mit mindestens einem Kühlflüssigkeitskanal (23), zum Einspritzen von Kühlflüssigkeit ins Innere des hinteren Waffenrohrendes (10), und mit Mitteln zum Dosieren der Kühlmittelzufuhr, wobei sich der Kühlflüssigkeitskanal (23) in der Waffenrohrwand (26) befindet und in die Rohrinnenwand (13) mündet, dadurch gekennzeichnet, dass eine vom Treibgasdruck betätigbare Vorrichtung zur Erzeugung des Kühlflüssigkeits-Einspritzdruckes am Waffenrohr (11) angeordnet ist, mit welcher die Kühlflüssigkeit zugleich dosiert und mit dem erforderlichen Druck eingespritzt wird.1. Device for cooling the inner tube wall (13) of a gun barrel (11) of a firearm, with at least one coolant channel (23) for injecting coolant into the interior of the rear gun barrel end (10), and with means for metering the coolant supply, the Coolant channel (23) is located in the gun barrel wall (26) and opens into the barrel inner wall (13), characterized in that a device which can be actuated by the propellant gas pressure and is used to generate the coolant injection pressure is arranged on the gun barrel (11), with which the coolant is metered and is injected at the required pressure. 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die vom Treibgasdruck betätigbare Vorrichtung eine Kolbenanordnung (41,54) aufweist, die sowohl zur Erzeugung des Einspritzdruckes als auch zur Dosierung der Einspritzmenge der Kühlflüssigkeit dient, wobei der Kolben (41) durch den Gasdruck verschiebbar ist, um eine dosierte Kühlflüssigkeitsmenge in das Innere des hinteren Waffenrohrendes (10) einzuspritzen.2. Device according to claim 1, characterized in that the device which can be actuated by the propellant gas pressure has a piston arrangement (41, 54) which serves both for generating the injection pressure and for metering the injection quantity of the cooling liquid, the piston (41) being affected by the gas pressure is displaceable in order to inject a metered amount of coolant into the interior of the rear weapon barrel end (10). 3. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Kolbenanordnung aus zwei Kolben (41 und 54) besteht, welche unterschiedliche Durchmesser aufweisen, wobei der Kolben (54) mit dem grösseren Durchmesser vom Treibgas und der Kolben (41) mit dem kleineren Durchmesser von der Kühlflüssigkeit beaufschlagt ist.3. Device according to claim 2, characterized in that the piston arrangement consists of two pistons (41 and 54) which have different diameters, the piston (54) with the larger diameter of the propellant gas and the piston (41) with the smaller diameter is acted upon by the coolant. 4. Einrichtung nach Anspruch 3, dadurch gekennzeichnet, dass ein Ringfederpaket (56) zum Abbremsen des Kolbens (54) mit dem grossen Durchmesser, und eine Schraubenfeder (44) zum Zurückschieben des Kolbens (41) in seine Ausgangslage angeordnet sind.4. Device according to claim 3, characterized in that an annular spring assembly (56) for braking the piston (54) with the large diameter, and one Coil spring (44) for pushing the piston (41) back into its initial position. 5. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, dass am Waffenrohr (11) ein erstes Gehäuse (27) mit einem ersten Zylinder (38) zur Aufnahme des Kolbens (41) mit dem kleineren Durchmesser befestigt ist, sowie ein Träger (47) mit einem zweiten Zylinder (46) zur Aufnahme des Kolbens (54) mit dem grösseren Durchmeser.5. Device according to claim 4, characterized in that a first housing (27) with a first cylinder (38) for receiving the piston (41) with the smaller diameter is attached to the weapon barrel (11), and a carrier (47) with a second cylinder (46) for receiving the piston (54) with the larger diameter. 6. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Kühlflüssigkeits behälter (37) vorhanden ist, in welchem die Kühlflüssigkeit mit Hilfe eines Kolbens (57) und einer Feder (60,61) unter Druck steht.6. Device according to claim 1, characterized in that a coolant container (37) is present, in which the coolant is under pressure with the aid of a piston (57) and a spring (60,61).
EP88116172A 1987-10-28 1988-09-30 Mechanism for cooling the interior of a gun barrel Expired - Lifetime EP0313856B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH422287 1987-10-28
CH4222/87 1987-10-28

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EP0313856A1 true EP0313856A1 (en) 1989-05-03
EP0313856B1 EP0313856B1 (en) 1992-02-26

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EP (1) EP0313856B1 (en)
DE (1) DE3868584D1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
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DE4022542A1 (en) * 1990-07-16 1992-01-23 Rheinmetall Gmbh Sprayer for cooling max. charge chamber temp. in howitzer - has front end nozzle fitted at distance corresp. to hottest zone at barrel end closure side
EP0973003A1 (en) * 1998-07-14 2000-01-19 Oerlikon Contraves Ag Method and device for the cooling of gun barrels
US6591732B2 (en) 1999-07-14 2003-07-15 Oerlikon Conatraves Ag Method and device for cooling gun barrels of firearms
RU2466339C1 (en) * 2011-05-13 2012-11-10 Учреждение Российской академии наук Институт прикладной механики Уральского отделения РАН Cooling device of artillery-type and small-arms weapon barrels
RU2541022C2 (en) * 2013-01-14 2015-02-10 Виталий Алексеевич Алтунин Method to charge air cylinders for diesel engines start with air

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DE19842542C2 (en) * 1998-09-17 2001-09-20 Rheinmetall W & M Gmbh Cooling device for supplying a cooling medium on the closure side
EP1285216B1 (en) * 1999-07-05 2006-09-13 Singapore Technologies Kinetics Ltd. Artillery firing mechanism
US6679156B1 (en) 2002-03-18 2004-01-20 Samir A. Danou Weapon with rotating barrel
DE102019004483B4 (en) 2018-06-28 2024-09-26 Gerhard Kirstein Firearm

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US2641162A (en) * 1942-02-04 1953-06-09 Us Sec War Gun barrel cooling means
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US2806409A (en) * 1951-05-29 1957-09-17 William P Purcella Cooling mechanism for machine guns and the like

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022542A1 (en) * 1990-07-16 1992-01-23 Rheinmetall Gmbh Sprayer for cooling max. charge chamber temp. in howitzer - has front end nozzle fitted at distance corresp. to hottest zone at barrel end closure side
EP0973003A1 (en) * 1998-07-14 2000-01-19 Oerlikon Contraves Ag Method and device for the cooling of gun barrels
US6311602B1 (en) 1998-07-14 2001-11-06 Oerlikon Contraves Ag Device for cooling gun barrels of firearms
US6591732B2 (en) 1999-07-14 2003-07-15 Oerlikon Conatraves Ag Method and device for cooling gun barrels of firearms
RU2466339C1 (en) * 2011-05-13 2012-11-10 Учреждение Российской академии наук Институт прикладной механики Уральского отделения РАН Cooling device of artillery-type and small-arms weapon barrels
RU2541022C2 (en) * 2013-01-14 2015-02-10 Виталий Алексеевич Алтунин Method to charge air cylinders for diesel engines start with air

Also Published As

Publication number Publication date
EP0313856B1 (en) 1992-02-26
DE3868584D1 (en) 1992-04-02
US4884490A (en) 1989-12-05

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