EP0600385B1 - Igniter for propulsive charge - Google Patents

Igniter for propulsive charge Download PDF

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Publication number
EP0600385B1
EP0600385B1 EP93119070A EP93119070A EP0600385B1 EP 0600385 B1 EP0600385 B1 EP 0600385B1 EP 93119070 A EP93119070 A EP 93119070A EP 93119070 A EP93119070 A EP 93119070A EP 0600385 B1 EP0600385 B1 EP 0600385B1
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EP
European Patent Office
Prior art keywords
guide tube
charge
ignition
base piece
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP93119070A
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German (de)
French (fr)
Other versions
EP0600385A1 (en
Inventor
Alfred Hörr
Heinz Riess
Uwe Brede
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.)
Dynamit Nobel GmbH Explosivstoff und Systemtechnik
Original Assignee
Dynamit Nobel AG
Dynamit Nobel GmbH Explosivstoff und Systemtechnik
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Publication of EP0600385A1 publication Critical patent/EP0600385A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/0826—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition comprising an elongated perforated tube, i.e. flame tube, for the transmission of the initial energy to the propellant charge, e.g. used for artillery shells and kinetic energy penetrators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0807—Primers; Detonators characterised by the particular configuration of the transmission channels from the priming energy source to the charge to be ignited, e.g. multiple channels, nozzles, diaphragms or filters

Definitions

  • the invention relates to a propellant charge igniter according to the preamble of claim 1.
  • the propellant charge arranged in a propellant charge carrier for example a cartridge, must be fired in a controlled manner.
  • the aim is to ignite the entire propellant charge in such a way that a high initial pressure is quickly generated and that the pressure is then kept at a high level for as long as possible.
  • Local pressure peaks occurring within the propellant charge are undesirable since they have a negative effect on the further burn-up of the propellant charge and also negatively affect the life of the launch tube.
  • Propellant charges are therefore not only ignited from one end, but special propellant charge lighters with ignition guide tubes are used.
  • DE 38 29 657 A1 discloses a propellant charge igniter in which a transfer charge arranged in an elongated ignition guide tube (winding tube) is ignited by means of an ignition charge.
  • the ignition guide tube which is arranged concentrically with a flame guide tube, protrudes with its end on the bottom piece side into a bottom piece.
  • a separation charge is arranged within the contour of the bottom part of the flame guide tube.
  • the propellant charge lighter has a metallic sleeve which is arranged between the separating charge and the ignition guide tube.
  • annular seal is arranged in a circumferential groove of the flame guide tube, which acts as a valve with the metallic sleeve and the flame guide tube and, in the open position, allows the hot combustion gases of the separating charge to flow against the ignition guide tube.
  • the ignition of a propellant charge with the propellant charge lighter according to DE 38 29 657 A1 takes place in such a way that the primer charge first ignites the transfer charge, which is composed of annular igniter tablets. The transfer charge then ignites the propellant charge through openings in the ignition guide tube, which in turn then ignites the separating charge through firing holes in the base piece. The hot gases of the separating charge push the ring seal aside and cut through the ignition guide tube in the region of the end of the base piece facing away from the base side. Due to the gases flowing out of the launch tube, the separated part of the ignition guide tube is then thrown out of the launch tube, while the other part of the ignition guide tube remains in connection with the base piece.
  • the transfer charge which is composed of annular igniter tablets.
  • the transfer charge then ignites the propellant charge through openings in the ignition guide tube, which in turn then ignites the separating charge through firing holes in the base piece.
  • the hot gases of the separating charge push the ring seal aside and cut through the ignition guide tube in the region of the
  • the invention has for its object to provide a propellant lighter in which the risk of afterglow is avoided.
  • the fuel assembly is an expulsion unit for the complete expulsion of the ignition guide tube from the annular space, which merges into the combustion chamber at its end facing the bottom side. Due to the transition of the annular space into the combustion space, the gases generated in the combustion space by the combustion of the expulsion set can press onto an end face of the ignition guide tube facing the base side and thereby drive it out of the annular space. As a result, only metallic parts remain on the base piece after the shot and the base piece itself in the weapon barrel, which cool down quickly due to the good heat conduction of the metal parts. Due to the complete expulsion of the ignition guide tube, an afterglow of material in the bottom screw is avoided.
  • the annular space is preferably from a substantially tapering towards the bottom side limited conical inner surface of the base piece.
  • This conical inner surface cooperates with a conical outer surface of the ignition guide tube, the angle of inclination to the longitudinal axis of the propellant charge lighter corresponds to the cone angle of the inner surface of the base piece in the annular space area, so that a secure connection of the ignition guide tube to the base piece is ensured before firing.
  • the conical surfaces transmit shock or pressure forces on the tip of the propellant tube safely to the base.
  • the two conical surfaces also allow a particularly reliable separation of the ignition guide tube from the base piece, since friction forces between the ignition guide tube and the base piece are only effective over a short area when the ignition guide tube is driven out.
  • the base piece At its end facing away from the bottom side, the base piece preferably has on its inside a toothing which is in engagement with the ignition guide tube. By means of this toothing, the base piece claws with the ignition guide tube in such a way that a secure connection is provided during the transportation of the propellant charge lighter.
  • the base piece can also be pressed inwards at its end facing away from the base side by squeezing the ignition guide tube. The pressing in, which takes place after the ignition guide tube and the base part have been plugged together, creates a zone on the ignition guide tube which bears against the end face of the base piece.
  • the claw and the zone formed by the indentation cause the ignition guide tube by axial compression or by a defined axial tensile stress can not be pushed further into the bottom piece or pulled out. This maintains the frictional force set during the manufacture of the propellant lighter and matched to the strength of the expelling charge, so that ammunition provided with the propellant charge lighter according to the invention can also be dropped with a parachute.
  • the inner surface of the base piece can also be glued to the outer surface of the ignition guide tube.
  • an immovable ring seal is arranged in an annular groove in the flame guide tube, which rests in the ring groove and on the ignition guide tube and seals the flame guide tube with respect to the ignition guide tube surrounding it.
  • the drivable ignition guide tube of the propellant charge lighter which is preferably a winding tube made of a fiber material, can be made of a combustible / consumable material which therefore largely burns during the ignition or combustion of the propellant charge of the cartridge.
  • the ignition guide tube can be wound from a glass fiber reinforced plastic.
  • a propellant lighter 10 is shown, which is installed in a cartridge bottom part 12 turned from metal.
  • the cartridge base part 12 is open towards its upper end facing away from the base side 14.
  • a combustible cartridge case 16 which carries a bullet (not shown) at its front end.
  • the cartridge bottom part 12 and the cartridge shell 16 are filled with a propellant charge 18, which consists of individual, pourable propellant grains 20, and thus form a propellant charge carrier.
  • the propellant charge lighter 10 has a bottom piece 24 with a bottom side 26 which is coaxial to the Cartridge bottom part 12 extends and its end facing away from the bottom side 26 does not protrude beyond the edge 30 of the cartridge bottom part 12 facing away from the bottom side 14.
  • An igniter 32 with a cylindrical igniter housing 33 is screwed into the base piece 24 and has an electrically ignitable primary ignition element 34 and an ignition charge 36 ignitable by the latter.
  • the ignition charge 36 is arranged in a cavity 38 of the base piece 24, which is open in the direction away from the base side 26 and merges there into a flame channel 42 which extends along the longitudinal axis 40 of the propellant charge lighter 10 and is formed in a flame guide tube 44 made of metal .
  • the flame guide tube 44 is firmly connected to the base piece 24.
  • a combustion chamber 52 At the end of the annular space 49 facing the bottom side 26 there is a combustion chamber 52 in which an expulsion set 54 is arranged.
  • the expulsion set 54 consists of annular propellant tablets which surround a tapered area of the flame guide tube 44.
  • the winding tube 50 consists of fiber-reinforced plastic, in particular of high-strength textile fiber that can be consumed by combustion, and has a thickening 56 on its end facing the bottom side 26, the outer surface 58 of which tapers towards the bottom side 26.
  • the angle of inclination of the outer surface 58 to the longitudinal axis 40 of the propellant lighter corresponds to that of the Inner surface of the base piece 24 in the region of the annular space 49.
  • the winding tube 50 has an annular end surface 60 which faces the combustion space 52.
  • a transfer charge 64 is arranged in the winding tube 50, which has radially extending openings 62.
  • the winding tube 50 which surrounds the flame guide tube 44, which is essentially circular cylindrical in the region of the annular space 49, is sealed off from the flame guide tube 44 by means of an annular seal 68 arranged in an external annular groove 66 of the flame guide tube 44.
  • the annular groove 66 and the ring seal 68 are matched so that the ring seal 68 is immovable in the annular groove 66.
  • the base piece 24 has teeth 80 on its end 28 facing away from the base side 26 - preferably a flat thread.
  • the gearing is engaged with the winding tube 50.
  • the base piece 24 is also flanged or pressed radially inward at its end 28 facing away from the base side 26 and enclosing the winding tube 50.
  • An adhesive layer 83 can also be provided between the conical outer surface 58 of the winding tube 50 and the conical inner surface 48 of the base piece 24.
  • the electrically actuable ignition trigger element 34 is triggered. This ignites the ignition charge 36, the hot gases of which then pass through the flame channel 42 to the transfer charge 64.
  • the hot compressed gases of the transfer charge 64 break open the cover 88 over the openings 62 and ignite the propellant charge 18.
  • the propellant charge gases then accelerate the projectile and also penetrate the cover 88 over the firing openings 78 and through them into the combustion chamber 52 a.
  • the expulsion set 54 arranged in the combustion chamber 52 then ignites and its gases act on the annular end face 60 of the winding tube 50, which then releases from the frictional engagement with the base piece 24.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighters Containing Fuel (AREA)
  • Air Bags (AREA)

Description

Die Erfindung betrifft einen Treibladungsanzünder nach dem Oberbegriff des Anspruchs 1.The invention relates to a propellant charge igniter according to the preamble of claim 1.

Um ein Geschoß mit einer Treibladung aus einem Abschußrohr möglichst weit verschießen zu können, ist es erforderlich, die in einem Treibladungsträger, beispielsweise einer Patrone, angeordnete Treibladung kontrolliert zu zünden. Dabei wird angestrebt, die gesamte Treibladung so zu zünden, daß schnell ein hoher Anfangsdruck erzeugt wird und daß anschließend der Druck möglichst lange auf hohem Niveau gehalten wird. Dabei sind innerhalb der Treibladung lokal auftretende Druckspitzen unerwünscht, da sie den weiteren Abbrand der Treibladung negativ beeinflussen und auch die Lebensdauer des Abschußrohres negativ beeinträchtigen. Treibladungen werden daher nicht nur von einem Ende her gezündet, sondern es werden spezielle Treibladungsanzünder mit Zündführungsrohren verwendet.In order to be able to fire a projectile with a propellant charge from a launch tube as far as possible, the propellant charge arranged in a propellant charge carrier, for example a cartridge, must be fired in a controlled manner. The aim is to ignite the entire propellant charge in such a way that a high initial pressure is quickly generated and that the pressure is then kept at a high level for as long as possible. Local pressure peaks occurring within the propellant charge are undesirable since they have a negative effect on the further burn-up of the propellant charge and also negatively affect the life of the launch tube. Propellant charges are therefore not only ignited from one end, but special propellant charge lighters with ignition guide tubes are used.

Aus DE 38 29 657 A1 ist ein Treibladungsanzünder bekannt, bei dem eine in einem langgestreckten Zündführungsrohr (Wickelrohr) angeordnete Übertragungsladung mittels einer Anzündladung gezündet wird. Das konzentrisch zu einem Flammleitrohr angeordnete Zündführungsrohr ragt mit seinem bodenstückseitigen Ende in ein Bodenstück hinein. Eine Abtrennladung ist innerhalb der Kontur des Bodenstücks des Flammleitrohres angeordnet. Ferner weist der Treibladungsanzünder eine metallische Hülse auf, die zwischen der Abtrennladung und dem Zündführungsrohr angeordnet ist. An dem einer Bodenseite des Bodenstücks abgewandten Ende der metallischen Hülse ist eine Ringdichtung in einer umlaufenden Auskehlung des Flammleitrohrs angeordnet, die mit der metallischen Hülse und dem Flammleitrohr als Ventil wirkt und in der geöffneten Stellung die heißen Verbrennungsgase der Abtrennladung gegen das Zündführungsrohr strömen läßt.DE 38 29 657 A1 discloses a propellant charge igniter in which a transfer charge arranged in an elongated ignition guide tube (winding tube) is ignited by means of an ignition charge. The ignition guide tube, which is arranged concentrically with a flame guide tube, protrudes with its end on the bottom piece side into a bottom piece. A separation charge is arranged within the contour of the bottom part of the flame guide tube. Furthermore, the propellant charge lighter has a metallic sleeve which is arranged between the separating charge and the ignition guide tube. On the end of the metallic sleeve facing away from a bottom side of the base piece, an annular seal is arranged in a circumferential groove of the flame guide tube, which acts as a valve with the metallic sleeve and the flame guide tube and, in the open position, allows the hot combustion gases of the separating charge to flow against the ignition guide tube.

Die Zündung einer Treibladung mit dem Treibladungsanzünder gemäß DE 38 29 657 A1 erfolgt derart, daß zuerst die Anzündladung die Übertragungsladung, die aus ringförmigen Anzündstofftabletten aufgebaut ist, zündet. Anschließend zündet die Übertragungsladung durch Durchbrüche in dem Zündführungsrohr hindurch die Treibladung, die ihrerseits dann durch Anfeuerungsbohrungen in dem Bodenstück hindurch die Abtrennladung zündet. Die heißen Gase der Abtrennladung drücken die Ringdichtung zur Seite und durchtrennen das Zündführungsrohr im Bereich des der Bodenseite abgewandten Endes des Bodenstücks. Durch die aus dem Abschußrohr herausströmenden Gase wird dann der abgetrennte Teil des Zündführungsrohres aus dem Abschußrohr herausgeschleudert, während das andere Teil des Zündführungsrohrs im Verbund mit dem Bodenstück verbleibt.The ignition of a propellant charge with the propellant charge lighter according to DE 38 29 657 A1 takes place in such a way that the primer charge first ignites the transfer charge, which is composed of annular igniter tablets. The transfer charge then ignites the propellant charge through openings in the ignition guide tube, which in turn then ignites the separating charge through firing holes in the base piece. The hot gases of the separating charge push the ring seal aside and cut through the ignition guide tube in the region of the end of the base piece facing away from the base side. Due to the gases flowing out of the launch tube, the separated part of the ignition guide tube is then thrown out of the launch tube, while the other part of the ignition guide tube remains in connection with the base piece.

Dies den Nachteil, daß noch unerwünschte glimmende Reste beim Herausziehen des Patronenbodens aus dem Waffenrohr auftreten können.This has the disadvantage that undesired smoldering residues can occur when the cartridge base is pulled out of the barrel.

Der Erfindung liegt die Aufgabe zugrunde, einen Treibladungsanzünder zur Verfügung zu stellen, bei dem die Gefahr des Nachglimmens vermieden ist.The invention has for its object to provide a propellant lighter in which the risk of afterglow is avoided.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den Merkmalen des Patentanspruchs 1.This object is achieved according to the invention with the features of patent claim 1.

Bei dem erfindungsgemäßen Treibladungsanzünder ist der Brennsatz ein Austreibsatz zum gänzlichen Austreiben des Zündführungsrohres aus dem Ringraum, der an seinem der Bodenseite zugewandten Ende in den Verbrennungsraum übergeht. Durch den Übergang des Ringraums in den Verbrennungsraum können die in dem Verbrennungsraum durch die Verbrennung des Austreibsatzes erzeugten Gase auf eine der Bodenseite zugewandte Stirnfläche des Zündführungsrohrs drücken und dieses dadurch aus dem Ringraum austreiben. Dadurch verbleiben nach dem Abschuß nur metallische Teile an dem Bodenstück sowie das Bodenstück selbst in dem Waffenrohr, die sich aufgrund der guten Wärmeleitung der Metallteile schnell abkühlen. Durch das gänzliche Austreiben des Zündführungsrohrs wird auf diese Weise ein Nachglimmen von Material in der Bodenschraube vermieden.In the propellant charge lighter according to the invention, the fuel assembly is an expulsion unit for the complete expulsion of the ignition guide tube from the annular space, which merges into the combustion chamber at its end facing the bottom side. Due to the transition of the annular space into the combustion space, the gases generated in the combustion space by the combustion of the expulsion set can press onto an end face of the ignition guide tube facing the base side and thereby drive it out of the annular space. As a result, only metallic parts remain on the base piece after the shot and the base piece itself in the weapon barrel, which cool down quickly due to the good heat conduction of the metal parts. Due to the complete expulsion of the ignition guide tube, an afterglow of material in the bottom screw is avoided.

Da der Verbrennungsraum und der Ringraum in Längsrichtung hintereinanderliegen, ist es nicht erforderlich, eine die beiden Räume trennende metallische Hülse anzubringen und zwischen den Räumen eine Ventilanordnung vorzusehen. Der Ringraum ist vorzugsweise von einer sich zur Bodenseite hin im wesentlichen verjüngenden konischen Innenfläche des Bodenstücks begrenzt. Diese konische Innenfläche wirkt mit einer konischen Außenfläche des Zündführungsrohres, deren Neigungswinkel zur Längsachse des Treibladungsanzünders dem Konuswinkel der Innenfläche des Bodenstücks im Ringraumbereich entspricht, so zusammen, daß eine sichere Verbindung des Zündführungsrohres mit Bodenstück vor dem Abschuß gewährleistet ist. Die konischen Flächen übertragen Stoß- oder Druckkräfte auf die Spitze des Treibladungsrohres sicher auf das Bodenstück. Dadurch wird auch das Einsetzen des Treibladungsanzünders in eine mit der Treibladung gefüllte Hülse erleichtert. Die beiden konischen Flächen erlauben andererseits aber auch eine besonders zuverlässige Trennung des Zündführungsrohrs von dem Bodenstück, da beim Austreiben des Zündführungsrohres Reibungskräfte zwischen dem Zündführungsrohr und dem Bodenstück nur über einen kurzen Bereich wirksam sind.Since the combustion space and the annular space lie one behind the other in the longitudinal direction, it is not necessary to attach a metallic sleeve separating the two spaces and to provide a valve arrangement between the spaces. The annular space is preferably from a substantially tapering towards the bottom side limited conical inner surface of the base piece. This conical inner surface cooperates with a conical outer surface of the ignition guide tube, the angle of inclination to the longitudinal axis of the propellant charge lighter corresponds to the cone angle of the inner surface of the base piece in the annular space area, so that a secure connection of the ignition guide tube to the base piece is ensured before firing. The conical surfaces transmit shock or pressure forces on the tip of the propellant tube safely to the base. This also facilitates the insertion of the propellant charge lighter into a sleeve filled with the propellant charge. On the other hand, the two conical surfaces also allow a particularly reliable separation of the ignition guide tube from the base piece, since friction forces between the ignition guide tube and the base piece are only effective over a short area when the ignition guide tube is driven out.

Vorzugsweise weist das Bodenstück an seinem der Bodenseite abgewandten Ende auf seiner Innenseite eine mit dem Zündführungsrohr im Eingriff befindliche Verzahnung auf. Durch diese Verzahnung verkrallt sich das Bodenstück mit dem Zündführungsrohr derart, daß während des Transports des Treibladungsanzünders eine sichere Verbindung gegeben ist. Zur sicheren Verbindung des Bodenstücks mit dem Zündführungsrohr kann ferner das Bodenstück an seinem der Bodenseite abgewandten Ende das Zündführungsrohr einquetschend nach innen eingedrückt sein. Das Eindrücken, das nach dem Zusammenstecken des Zündführungsrohres und des Bodenteils erfolgt, erzeugt an dem Zündführungsrohr eine Zone, die gegen die Stirnseite des Bodenstücks anliegt. Die Verkrallung und die durch die Eindrückung gebildete Zone bewirken, daß das Zündführungsrohr durch axiale Stauchung bzw. durch eine definierte axiale Zugbeanspruchung nicht weiter in das Bodenstück eingeschoben bzw. herausgezogen werden kann. Damit bleibt die bei der Herstellung des Treibladungsanzünders eingestellte und auf die Stärke des Austreibsatzes abgestimmte Reibungskraft erhalten, so daß mit dem erfindungsgemäßen Treibladungsanzünder versehene Munition auch mit einem Fallschirm abgeworfen werden kann. Ferner kann auch die Innenfläche des Bodenstücks mit der Außenfläche des Zündführungsrohrs verklebt sein. Durch eine oder mehrere der obengenannten Maßnahmen zur Verbindung des Zündführungsrohres mit dem Bodenstück wird sichergestellt, daß der Treibladungsanzünder in Fallversuchen die erforderliche Festigkeit aufweist.At its end facing away from the bottom side, the base piece preferably has on its inside a toothing which is in engagement with the ignition guide tube. By means of this toothing, the base piece claws with the ignition guide tube in such a way that a secure connection is provided during the transportation of the propellant charge lighter. For a secure connection of the base piece to the ignition guide tube, the base piece can also be pressed inwards at its end facing away from the base side by squeezing the ignition guide tube. The pressing in, which takes place after the ignition guide tube and the base part have been plugged together, creates a zone on the ignition guide tube which bears against the end face of the base piece. The claw and the zone formed by the indentation cause the ignition guide tube by axial compression or by a defined axial tensile stress can not be pushed further into the bottom piece or pulled out. This maintains the frictional force set during the manufacture of the propellant lighter and matched to the strength of the expelling charge, so that ammunition provided with the propellant charge lighter according to the invention can also be dropped with a parachute. Furthermore, the inner surface of the base piece can also be glued to the outer surface of the ignition guide tube. One or more of the above-mentioned measures for connecting the ignition guide tube to the base piece ensures that the propellant charge lighter has the required strength in drop tests.

Um eine Zündung der Austreibladung durch die Verbrennungsgase der Übertragungsladung zu verhindern, ist in einer Ringnut in dem Flammleitrohr eine unbewegliche Ringdichtung angeordnet, die in der Ringnut und an dem Zündführungsrohr anliegt und das Flammleitrohr gegenüber dem dieses umgebenden Zündführungsrohr abdichtet.In order to prevent ignition of the expulsion charge by the combustion gases of the transfer charge, an immovable ring seal is arranged in an annular groove in the flame guide tube, which rests in the ring groove and on the ignition guide tube and seals the flame guide tube with respect to the ignition guide tube surrounding it.

Das austreibbare Zündführungsrohr des Treibladungsanzünders, bei dem es sich vorzugsweise um ein Wickelrohr aus einem Fasermaterial handelt, kann aus einem verbrennbaren/verzehrbaren Material hergestellt sein, das daher zu einem großen Teil bereits während des Anzündens bzw. des Abbrandes der Treibladung der Patrone verbrennt.The drivable ignition guide tube of the propellant charge lighter, which is preferably a winding tube made of a fiber material, can be made of a combustible / consumable material which therefore largely burns during the ignition or combustion of the propellant charge of the cartridge.

Wenn eine besonders widerstandsfähige Ummantelung der Übertragungsladung gewünscht ist, kann das Zündführungsrohr aus einem glasfaserverstärkten Kunststoff gewickelt sein.If a particularly robust sheathing of the transfer charge is desired, the ignition guide tube can be wound from a glass fiber reinforced plastic.

Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen sowie aus der Zeichnung im Zusammenhang mit der Beschreibung. Es zeigen:

Fig. 1
eine Schnittdarstellung des bodenseitigen Endes eines Treibladungsanzünders, in einem Patronenbodenteil eingebaut,
Fig. 2
den Treibladungsanzünder in Fig. 1 im Schnitt und
Fig. 3
das bodenseitige Ende eines in ein Bodenstück eingebauten Zündführungsrohres in vergrößerter Darstellung.
Further advantageous refinements and developments of the invention result from the subclaims and from the drawing in connection with the description. Show it:
Fig. 1
2 shows a sectional illustration of the bottom end of a propellant charge lighter, installed in a cartridge bottom part,
Fig. 2
the propellant lighter in Fig. 1 in section and
Fig. 3
the bottom end of an ignition guide tube installed in a base piece in an enlarged view.

In Fig. 1 ist ein Treibladungsanzünder 10 gezeigt, der in einem aus Metall gedrehten Patronenbodenteil 12 eingebaut ist. Das Patronenbodenteil 12 ist zu seinem der Bodenseite 14 abgewandten oberen Ende hin offen. An dem der Bodenseite 14 abgewandten Ende des Patronenbodenteils 12 schließt sich eine verbrennbare Patronenhülle 16 an, die an ihrem vorderen Ende ein (nicht dargestelltes) Geschoß trägt. Das Patronenbodenteil 12 und die Patronenhülle 16 sind mit einer Treibladung 18 gefüllt, die aus einzelnen, schüttfähigen Treibladungskörner 20 besteht, und bilden so einen Treibladungsträger.In Fig. 1, a propellant lighter 10 is shown, which is installed in a cartridge bottom part 12 turned from metal. The cartridge base part 12 is open towards its upper end facing away from the base side 14. At the end of the cartridge base part 12 facing away from the base side 14 there is a combustible cartridge case 16, which carries a bullet (not shown) at its front end. The cartridge bottom part 12 and the cartridge shell 16 are filled with a propellant charge 18, which consists of individual, pourable propellant grains 20, and thus form a propellant charge carrier.

In dem Patronenbodenteil 12 ist eine zentral angeordnete, mit einem Gewinde versehene Öffnung 22 vorgesehen, in die der Treibladungsanzünder 10 eingeschraubt ist. Der Treibladungsanzünder 10 weist ein Bodenstück 24 mit einer Bodenseite 26 auf, das sich koaxial zu dem Patronenbodenteil 12 erstreckt und dessen der Bodenseite 26 abgewandtes Ende nicht über den der Bodenseite 14 abgewandten Rand 30 des Patronenbodenteils 12 vorsteht. In das Bodenstück 24 ist ein Zünder 32 mit einem zylindrischen Zündergehäuse 33 eingeschraubt, der ein elektrisch zündbares Primärzündelement 34 und eine von diesem zündbare Anzündladung 36 aufweist. Die Anzündladung 36 ist in einem Hohlraum 38 des Bodenstücks 24 angeordnet, der in Richtung von der Bodenseite 26 weg offen ist und dort in einen sich entlang der Längsachse 40 des Treibladungsanzünders 10 erstreckenden Flammkanal 42 übergeht, der in einem aus Metall gefertigten Flammleitrohr 44 ausgebildet ist. Das Flammleitrohr 44 ist mit dem Bodenstück 24 fest verbunden.Provided in the cartridge base part 12 is a centrally arranged, threaded opening 22, into which the propellant charge lighter 10 is screwed. The propellant charge lighter 10 has a bottom piece 24 with a bottom side 26 which is coaxial to the Cartridge bottom part 12 extends and its end facing away from the bottom side 26 does not protrude beyond the edge 30 of the cartridge bottom part 12 facing away from the bottom side 14. An igniter 32 with a cylindrical igniter housing 33 is screwed into the base piece 24 and has an electrically ignitable primary ignition element 34 and an ignition charge 36 ignitable by the latter. The ignition charge 36 is arranged in a cavity 38 of the base piece 24, which is open in the direction away from the base side 26 and merges there into a flame channel 42 which extends along the longitudinal axis 40 of the propellant charge lighter 10 and is formed in a flame guide tube 44 made of metal . The flame guide tube 44 is firmly connected to the base piece 24.

Eine Außenfläche 46 des der Bodenseite 26 abgewandten Endbereichs des Flammleitrohrs 44 und eine diesem Bereich gegenüberliegende Innenfläche 48 des Bodenstücks 24 begrenzen einen Ringraum 49, in den ein als Wickelrohr 50 ausgebildetes Zündführungsrohr hineinragt. An dem der Bodenseite 26 zugewandten Ende des Ringraums 49 schließt sich ein Verbrennungsraum 52 an, in dem ein Austreibsatz 54 angeordnet ist. Der Austreibsatz 54 besteht aus ringförmigen Treibmitteltabletten, die einen verjüngten Bereich des Flammleitrohres 44 umgeben.An outer surface 46 of the end region of the flame guide tube 44 facing away from the base side 26 and an inner surface 48 of the base piece 24 opposite this region delimit an annular space 49 into which an ignition guide tube designed as a winding tube 50 projects. At the end of the annular space 49 facing the bottom side 26 there is a combustion chamber 52 in which an expulsion set 54 is arranged. The expulsion set 54 consists of annular propellant tablets which surround a tapered area of the flame guide tube 44.

Das Wickelrohr 50 besteht aus faserverstärktem Kunststoff, insbesondere aus hochfester durch Verbrennung verzehrbarer Textilfaser, und weist an seinem der Bodenseite 26 zugewandten Ende eine Verdickung 56 auf, deren Außenfläche 58 sich zur Bodenseite 26 hin verjüngt. Der Neigungswinkel der Außenfläche 58 zur Längsachse 40 des Treibladungsanzünders entspricht dem der Innenfläche des Bodenstücks 24 im Bereich des Ringraums 49. Das Wickelrohr 50 weist eine ringförmige Stirnfläche 60 auf, die dem Verbrennungsraum 52 zugewandt ist. In dem Wickelrohr 50, das sich radial erstreckende Durchbrüche 62 aufweist, ist eine Übertragungsladung 64 angeordnet. Das Wickelrohr 50, das das im Bereich des Ringraums 49 im wesentlichen kreiszylindrische Flammleitrohr 44 umschließt, ist gegenüber dem Flammleitrohr 44 mittels einer in einer außenliegenden Ringnut 66 des Flammleitrohrs 44 angeordneten Ringdichtung 68 abgedichtet. Die Ringnut 66 und die Ringdichtung 68 sind so abgestimmt, daß die Ringdichtung 68 in der Ringnut 66 unbeweglich ist.The winding tube 50 consists of fiber-reinforced plastic, in particular of high-strength textile fiber that can be consumed by combustion, and has a thickening 56 on its end facing the bottom side 26, the outer surface 58 of which tapers towards the bottom side 26. The angle of inclination of the outer surface 58 to the longitudinal axis 40 of the propellant lighter corresponds to that of the Inner surface of the base piece 24 in the region of the annular space 49. The winding tube 50 has an annular end surface 60 which faces the combustion space 52. A transfer charge 64 is arranged in the winding tube 50, which has radially extending openings 62. The winding tube 50, which surrounds the flame guide tube 44, which is essentially circular cylindrical in the region of the annular space 49, is sealed off from the flame guide tube 44 by means of an annular seal 68 arranged in an external annular groove 66 of the flame guide tube 44. The annular groove 66 and the ring seal 68 are matched so that the ring seal 68 is immovable in the annular groove 66.

Um die Montierbarkeit des Treibladungsanzünders 10 zu erleichtern, weist das Bodenstück 24 ein metallisches Zwischenteil 70 auf, in das das Flammleitrohr 44 so einschraubbar ist, daß der Austreibsatz 54 um das Flammleitrohr 44 zwischen einer Schulter 72 und dem Zwischenteil 70 gehalten ist. Das Zwischenteil 70 ist in einer konzentrischen Längsbohrung 74 des Bodenstücks 24 angeordnet und mittels Stiften 76, die durch das Bodenstück 24 in das Zwischenstück 70 hineinragen, festgelegt. Das im wesentlichen hohle zylindrische Bodenstück 24 weist ferner sich radial erstreckende Anfeuerungsöffnungen 78 auf, über die der Verbrennungsraum 52 mit dem von der Treibladung 18 ausgefüllten das Bodenstück 24 umgebenden Innenraum der Patrone in Verbindung steht.In order to facilitate the assembly of the propellant charge lighter 10, the base piece 24 has a metallic intermediate part 70 into which the flame guide tube 44 can be screwed in such a way that the expulsion set 54 is held around the flame guide tube 44 between a shoulder 72 and the intermediate part 70. The intermediate part 70 is arranged in a concentric longitudinal bore 74 of the base piece 24 and is fixed by means of pins 76 which protrude through the base piece 24 into the intermediate piece 70. The essentially hollow cylindrical base piece 24 also has radially extending firing openings 78, via which the combustion chamber 52 communicates with the interior of the cartridge surrounding the base piece 24 and filled with the propellant charge 18.

Um die Verbindung zwischen dem Wickelrohr 50 und dem Bodenstück 24 möglichst stoßsicher zu gestalten, weist das Bodenstück 24 an seinem der Bodenseite 26 abgewandten Ende 28 eine Verzahnung 80 - vorzugsweise ein flaches Gewinde - auf. Die Verzahnung ist im Eingriff mit dem Wickelrohr 50. Das Bodenstück 24 ist außerdem an seinem der Bodenseite 26 abgewandten und das Wickelrohr 50 umschließenden Ende 28 radial einwärts gebördelt bzw. gedrückt. Durch das Eindrücken wird in dem Wickelrohr 50 eine Bördelzone 81 gebildet, die gegen die obere Stirnseite 82 des Bodenstücks 24 anliegt. Zwischen der konischen Außenfläche 58 des Wickelrohrs 50 und der konischen Innenfläche 48 des Bodenstücks 24 kann ferner eine Klebstoffschicht 83 vorgesehen sein. Um das Wickelrohr 50 an dem der Bodenseite 26 abgewandten Ende 28 abzudichten, ist ein Stopfen 84 vorgesehen. Darüber hinaus ist das Wickelrohr 50 an seinem vorderen, der Bodenseite abgewandten Ende 28 mit einer Spitze 86 versehen, die das Einsetzen des Treibladungsanzünders 10 in die geschüttete Treibladung 18 erleichtert. Ferner wird das Einsetzen des Treibladungsanzünders 10 durch eine aus thermoplastischem Kunststoff bestehende dünne Abdeckung 88 - vorzugsweise einem Schrumpfschlauch - erleichtert, der sich über das gesamte Wickelrohr 50 und über den die Anfeuerungsöffnungen 78 enthaltenen Bereichs des Bodenstücks 24 erstreckt und den Treibladungsanzünder 10 vor dem Eindringen von Feuchtigkeit schützt.In order to make the connection between the winding tube 50 and the base piece 24 as shockproof as possible, the base piece 24 has teeth 80 on its end 28 facing away from the base side 26 - preferably a flat thread. The gearing is engaged with the winding tube 50. The base piece 24 is also flanged or pressed radially inward at its end 28 facing away from the base side 26 and enclosing the winding tube 50. By pressing in a flanging zone 81 is formed in the winding tube 50, which abuts against the upper end face 82 of the bottom piece 24. An adhesive layer 83 can also be provided between the conical outer surface 58 of the winding tube 50 and the conical inner surface 48 of the base piece 24. A plug 84 is provided to seal the winding tube 50 at the end 28 facing away from the base side 26. In addition, the winding tube 50 is provided at its front end 28 facing away from the bottom with a tip 86 which facilitates the insertion of the propellant charge lighter 10 into the poured propellant charge 18. Furthermore, the insertion of the propellant charge lighter 10 is facilitated by a thin cover 88 made of thermoplastic plastic - preferably a shrink tube - which extends over the entire winding tube 50 and over the area of the base piece 24 which contains the firing openings 78 and the propellant charge lighter 10 before it penetrates Protects moisture.

Zur Zündung der Treibladung 18 wird das elektrisch betätigbare Zündauslöseelement 34 ausgelöst. Dieses zündet die Anzündladung 36, deren heiße Gase daraufhin durch den Flammkanal 42 zu der Übertragungsladung 64 gelangen. Die heißen Druckgase der Übertragungsladung 64 brechen die Abdeckung 88 über den Durchbrüchen 62 auf und zünden die Treibladung 18. Die Treibladungsgase beschleunigen daraufhin das Geschoß und dringen auch, die Abdeckung 88 über den Anfeuerungsöffnungen 78 durchbrechend, durch diese hindurch in den Verbrennungsraum 52 ein. Der in dem Verbrennungsraum 52 angeordnete Austreibsatz 54 zündet daraufhin und dessen Gase wirken auf die ringförmige Stirnfläche 60 des Wickelrohrs 50, das sich daraufhin aus dem Reibschluß mit dem Bodenstück 24 löst. Die Stärke des Austreibsatzes 54 ist so gewählt, daß die durch die Druckgase erzeugte Kraft die Reibungskraft, die Kraft in der Klebstoffschicht 83 und die der Verzahnung 80 überwiegt. Das Wickelrohr 50 wird nach seiner Lösung aus dem Verbund mit dem Bodenstück 24 durch die Sogwirkung der Treibladungsgase weiter aus dem Stoßbodenbereich der Waffe ausgetrieben, um im erosiven Gasstrom besser zu verbrennen. Eine ungewünschte Frühzündung des Austreibsatzes 54 wird bei dem Treibladungsanzünder 10 durch die Ringdichtung 68 verhindert.To ignite the propellant charge 18, the electrically actuable ignition trigger element 34 is triggered. This ignites the ignition charge 36, the hot gases of which then pass through the flame channel 42 to the transfer charge 64. The hot compressed gases of the transfer charge 64 break open the cover 88 over the openings 62 and ignite the propellant charge 18. The propellant charge gases then accelerate the projectile and also penetrate the cover 88 over the firing openings 78 and through them into the combustion chamber 52 a. The expulsion set 54 arranged in the combustion chamber 52 then ignites and its gases act on the annular end face 60 of the winding tube 50, which then releases from the frictional engagement with the base piece 24. The strength of the expulsion set 54 is selected so that the force generated by the compressed gases outweighs the frictional force, the force in the adhesive layer 83 and that of the toothing 80. After being released from the bond with the base piece 24, the winding tube 50 is driven further out of the firing area of the weapon by the suction effect of the propellant charge gases in order to better burn in the erosive gas stream. An undesired early ignition of the expulsion set 54 is prevented by the ring seal 68 in the propellant charge lighter 10.

Claims (8)

  1. Propellent charge igniter having
    - a base piece (24) having a base side (26), which base piece can be mounted on a propellent charge carrier and is provided with a hollow chamber for receiving an ignition charge (36),
    - a flame conduit tube (44), the flame duct (42) of which extends essentially from the ignition charge (36) up to a primer charge (64),
    - an ignition guide tube (50) which is provided with openings (62) and surrounds the primer charge (64), and the base-piece-side end of which is fitted into an annular space (49) between the base piece (24) and the flame conduit tube (44) in a manner such that it surrounds the flame conduit tube (44) in a sealing manner, with the annular space (49) being open towards the end of the base piece (24) that faces away from the base side (26), and
    - a combustion charge, which is arranged in an annular combustion chamber (52) surrounding the flame conduit tube (44) and can be ignited through firing openings (78), which extend radially in the base piece (24), by a propellent charge (18),
    characterised in that
    - the end of the annular space (49) that faces the base side (26) passes over into the combustion chamber (52), and in that
    - the combustion charge is an ejection charge (54) for completely ejecting the ignition guide tube (50) out of the annular space (49).
  2. Propellent charge igniter according to claim 1, characterised in that the annular space (49) is delimited by a conical inside surface (48) of the base piece (24) that essentially tapers towards the base side (26), and in that the ignition guide tube (50) has a conical outside surface (58), whose angle of inclination with respect to the longitudinal axis (40) of the propellent charge igniter (10) corresponds to the cone angle of the inside surface (48) of the base piece (24) in the region of the annular space.
  3. Propellent charge igniter according to claim 1 or 2, characterised in that the end (28) of the base piece (24) that faces away from the base side (26) has, on the inside, toothing (80) which is in engagement with the ignition guide tube (50).
  4. Propellent charge igniter according to one of the claims 1 to 3, characterised in that at the end (28) of the base piece (24) that faces away from the base side (26), the ignition guide tube (56) (sic) is forced inwards in a manner such that it jams and a step (81) is thereby formed on the ignition guide tube (50).
  5. Propellent charge igniter according to one of the claims 1 to 4, characterised in that the inside surface (48) of the base piece (24) is stuck to the outside surface (58) of the ignition guide tube (50).
  6. Propellent charge igniter according to one of the claims 1 to 5, characterised in that an annular seal (68) is arranged between the ignition guide tube (50) and the flame conduit tube (44).
  7. Propellent charge igniter according to one of the claims 1 to 6, characterised in that the ignition guide tube (50) is produced from combustible material.
  8. Propellent charge igniter according to one of the claims 1 to 6, characterised in that the ignition guide tube (50) is wound from a fibre-reinforced plastics material.
EP93119070A 1992-12-01 1993-11-26 Igniter for propulsive charge Expired - Lifetime EP0600385B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4240273 1992-12-01
DE4240273A DE4240273A1 (en) 1992-12-01 1992-12-01 Propellant lighter

Publications (2)

Publication Number Publication Date
EP0600385A1 EP0600385A1 (en) 1994-06-08
EP0600385B1 true EP0600385B1 (en) 1997-05-28

Family

ID=6474033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119070A Expired - Lifetime EP0600385B1 (en) 1992-12-01 1993-11-26 Igniter for propulsive charge

Country Status (3)

Country Link
US (1) US5335600A (en)
EP (1) EP0600385B1 (en)
DE (2) DE4240273A1 (en)

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RU2508523C2 (en) * 2012-04-26 2014-02-27 Открытое акционерное общество "Научно-производственное предприятие "Краснознаменец" Igniter tube of electric impact action

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GB2281118B (en) * 1993-08-16 1997-06-18 Stylobate Proprietaries Limite Gas cartridge
FR2802297B1 (en) * 1999-12-08 2002-10-11 Giat Ind Sa IGNITION TUBE FOR ARTILLERY AMMUNITION
FR2806789B1 (en) * 2000-03-23 2002-06-07 Giat Ind Sa IGNITION TUBE FOR ARTILLERY AMMUNITION
US6672215B2 (en) * 2001-10-17 2004-01-06 Textron Systems Corporation Constant output high-precision microcapillary pyrotechnic initiator
DE20208287U1 (en) * 2002-05-28 2002-09-05 Hans Eichner Gmbh & Co Kg Compressed gas gun device
US20050257783A1 (en) * 2004-05-19 2005-11-24 Tippmann Dennis J Jr Valve arrangement
DE102007039662B4 (en) * 2007-08-22 2014-12-04 Rheinmetall Waffe Munition Gmbh charge igniter
US7784404B2 (en) * 2007-11-01 2010-08-31 Alliant Techsystems Inc. Dual fault safe and arm device, adaptive structures therewith and safety and reliability features therefor
FI120708B (en) * 2008-01-31 2010-01-29 Patria Weapon Systems Oy Arrangement to support the projectile into the barrel of the weapon, support element and method
DE102009052660B4 (en) 2008-11-13 2022-10-20 Ruag Ammotec Gmbh Pyrotechnic igniter
US9249759B1 (en) * 2012-08-30 2016-02-02 The United States Of America As Represented By The Secretary Of The Army Nozzled mortar ignition system for improved performance

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DE3009342A1 (en) * 1980-03-12 1986-06-26 Rheinmetall GmbH, 4000 Düsseldorf CARTRIDGED AMMUNITION WITH AT LEAST PARTLY COMBUSTIBLE DRIVE CHARGE
DE3226269C2 (en) * 1982-07-14 1986-04-17 Dynamit Nobel Ag, 5210 Troisdorf Partially combustible propellant charge lighter
DE3502166A1 (en) * 1985-01-23 1986-07-24 Dynamit Nobel Ag, 5210 Troisdorf PARTLY COMBUSTIBLE DRIVE CHARGER
FR2593905B1 (en) * 1986-02-03 1990-05-25 France Etat Armement DESTRUCTIBLE IGNITER FOR PROPELLANT CHARGES
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DE3938123A1 (en) * 1989-11-16 1991-05-23 Diehl Gmbh & Co DRIVE CHARGE LIGHT
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RU2508523C2 (en) * 2012-04-26 2014-02-27 Открытое акционерное общество "Научно-производственное предприятие "Краснознаменец" Igniter tube of electric impact action

Also Published As

Publication number Publication date
EP0600385A1 (en) 1994-06-08
DE59306589D1 (en) 1997-07-03
US5335600A (en) 1994-08-09
DE4240273A1 (en) 1994-06-09

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