EP3587995B1 - Générateur de type base-bleed et projectile doté d'un générateur de type base-bleed - Google Patents

Générateur de type base-bleed et projectile doté d'un générateur de type base-bleed Download PDF

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Publication number
EP3587995B1
EP3587995B1 EP19178395.0A EP19178395A EP3587995B1 EP 3587995 B1 EP3587995 B1 EP 3587995B1 EP 19178395 A EP19178395 A EP 19178395A EP 3587995 B1 EP3587995 B1 EP 3587995B1
Authority
EP
European Patent Office
Prior art keywords
base bleed
bleed
base
projectile
membrane
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.)
Active
Application number
EP19178395.0A
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German (de)
English (en)
Other versions
EP3587995A1 (fr
Inventor
Andre Becker
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.)
Rheinmetall Waffe Munition GmbH
Original Assignee
Rheinmetall Waffe Munition GmbH
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Publication date
Application filed by Rheinmetall Waffe Munition GmbH filed Critical Rheinmetall Waffe Munition GmbH
Publication of EP3587995A1 publication Critical patent/EP3587995A1/fr
Application granted granted Critical
Publication of EP3587995B1 publication Critical patent/EP3587995B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
    • F42B10/38—Range-increasing arrangements
    • F42B10/40—Range-increasing arrangements with combustion of a slow-burning charge, e.g. fumers, base-bleed projectiles

Definitions

  • the invention deals with a bullet having a base bleed.
  • the invention relates in particular to a device for (re)closing the base bleed of such a base bleed projectile.
  • Indirect fire from long distances is an integral part of an army's capabilities.
  • the focus is on mobility, precision and range.
  • the functional interfaces between the projectile and the weapon system are largely standardized and can therefore only be used to a limited extent for the range optimization aimed at in the artillery sector.
  • An ammunition concept based on this describes the unpublished one DE 10 2017 105 565.7 . It is suggested here to put together an artillery shell individually from several components.
  • the range and payload can be a criterion when putting together the artillery projectile.
  • Payloads as components or modular parts of the ammunition construction kit determine the task of the artillery ammunition. These payloads include in particular insensitive explosives (IHE), luminous, effect and smoke bodies as active bodies (payload).
  • IHE insensitive explosives
  • payload luminous, effect and smoke bodies as active bodies
  • Parts of the ammunition kit for range adjustment are base bleeds and boat tails.
  • a base bleed to reduce ground suction on the flight path.
  • a gas stream is generated by a burning pyrotechnic composition in the base bleed, which is effective in the area behind the projectile.
  • This pyrotechnic set is activated with the help of the high-energy, high-voltage propellant gases in the rear of the projectile immediately after the projectile has been fired.
  • the propellant gases are used to open a protective barrier in the rear of the projectile and ignite the pyrotechnic gas generator in the base bleed.
  • This ignition can be supported by an additional, separate ignition element. The ignition element burns briefly and violently.
  • the disadvantage is that there can be strong pressure fluctuations during the ignition phase of the base bleed and thus a reduction in the precision and performance of the base bleed.
  • the precision of an artillery projectile (e.g. 105 - 155mm) with base bleed depends to a significant extent on the rapid ignition and even burning of the pyrotechnic gas generator.
  • the performance of the base bleed is essentially measured by the increase in range of the bullet.
  • DE 60 2006 000 175 T2 discloses a guide-banded artillery projectile having a base bleed (block of propellant charge) disposed in a chamber.
  • a thin plate closure made of paper or aluminum foil can close a hole that is fluidly connected to the chamber. This tile can be broken in the internal ballistic phase.
  • a piston is also provided which, when there is excess pressure in the chamber, is displaced towards the bore and closes the bore.
  • the device has a comparatively complex structure with a high number of components.
  • the invention aims to eliminate these disadvantages.
  • the invention is based on the idea of designing the base bleed of a projectile in such a way that rapid ignition and uniform burning of the pyrotechnic gas generator are ensured.
  • a device is provided which realizes the (re)closing of the base bleed at a predetermined time.
  • the device can provide protection against environmental influences before the bullet or ammunition is fired.
  • the invention ensures that sufficient hot gases can penetrate into the base bleed in the gun barrel in order to ignite the surface of the pyrotechnic gas generator and the ignition element.
  • the base bleed opens when the bullet is fired. If the pressure level in the rear of the bullet, i.e. in the base bleed, exceeds the pressure level outside the base bleed, the base bleed is (re)closed by the device.
  • the device preferably works according to the so-called non-return valve principle.
  • the device consists of a preferably round frame with at least one cross member running centrally in the frame.
  • a membrane which is also preferably round, is fixed to this crossmember. This fixation on the traverse creates wing-like flaps, at least two. These can be pivoted into the base bleed if the gas pressure on the outside is higher than the gas pressure on the inside. This will open the base bleed.
  • the propellant gases can ignite the gas generator.
  • the wings or flaps are pressed against the frame of the device and the base bleed is closed again.
  • the pyrotechnic gas generator and the ignition element of the base bleed are thus protected from a strong drop in pressure when leaving the gun barrel.
  • the pyrotechnic gas generator is ignited quickly and evenly.
  • the device If the pressure in the base bleed has reached its technical design limit after reclosing, the device is completely or at least largely ejected.
  • the effective phase of the base bleed begins.
  • the ignition element can also be omitted due to the effect of the device according to the invention.
  • Fig. 1 shows a tail part 1 of an artillery shell 10, which is not completely shown.
  • a base bleed 11 is attached to the tail part 1.
  • the base bleed 11 comprises a housing 12. This is used to accommodate a pyrotechnic gas generator 2 and, if necessary, an ignition element 3.
  • the base bleed Bleed 11 can be closed by a device 4.
  • the device 4 can also protect the pyrotechnic charge (gas generator) 2 from being fired.
  • the device 4 also ensures that sufficiently hot gases in the gun barrel (not shown) can penetrate into the base bleed 11 in order to ignite the surface of the pyrotechnic gas generator 2 and, if necessary, the ignition element 3. To do this, the base bleed 11 opens when the bullet 10 is fired, which means that sufficient hot gases penetrate into the base bleed 11. If the pressure level in the rear of the projectile (base bleed 11) exceeds the pressure level outside, the device 4 closes the base bleed 11 again.
  • the device 4 can be a type of check valve.
  • Fig. 2 shows a possible embodiment of the device 4.
  • the device 4 consists of a preferably round frame 5 and a membrane 6 coordinated therewith.
  • the frame 5 has a traverse 5.1. This preferably runs centrally in the frame 5.
  • the membrane 6 is firmly attached to the traverse 5.1 and rests on the frame 5.
  • the material of the membrane 6 is chosen such that wings or flaps 6.2 can be pivoted inwards into the base bleed 11.
  • a thin metal membrane that is stable but technically acts like a spring plate is suitable for this purpose.
  • This metal membrane 6 or the spring plate or at least two spring plates can deform plastically (6.2).
  • the device 4 is installed/attached to the housing 12 in such a way that the wings 6.2 of the membrane 6 can be pivoted into the base bleed 11 when the gas pressure outside is higher than the gas pressure inside.
  • the base bleed 11 is opened.
  • the wings 6.2 are closed and the base bleed 11 is closed.
  • the pressure built up inside by closing the base bleed 11 results in the pyrotechnic gas generator 2 being ignited quickly and precisely.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Claims (10)

  1. Base-bleed (11) comprenant au moins un boîtier (12) et un générateur de gaz pyrotechnique (2) inséré dans celui-ci, avec un dispositif (4) apte à fermer le base-bleed (11), dans lequel le dispositif (4) ferme le base-bleed (11) lorsqu'une pression de gaz à l'intérieur du base-bleed (11) dépasse une pression de gaz à l'extérieur du base-bleed (11), caractérisé par le fait que le dispositif (4) présente un cadre (5) avec une traverse (5.1) et qu'une membrane (6) est fixée à la traverse (5.1), dans lequel des ailes ou volets (6.2) de la membrane (6) peuvent pivoter vers l'intérieur dans le base-bleed (11).
  2. Base-bleed (11) selon la revendication 1, caractérisé par le fait que le base-bleed (11) est ouvert en pivotant vers l'intérieur les ailes ou volets (6.2).
  3. Base-Bleed (11) selon la revendication 1 ou 2, caractérisé par le fait que la traverse (5.1) est disposée de manière centrale dans le cadre (5).
  4. Base-Bleed (11) selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que les formes du cadre (5) et de la membrane (6) sont coordonnées entre elles.
  5. Base-Bleed (11) selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que le cadre (5) et/ou la membrane (6) est/sont ronds, ovales, triangulaires, quadrangulaires ou polygonaux.
  6. Base-Bleed (11) selon l'une quelconque des revendications 1 à 5, caractérisé par le fait que le matériau de la membrane (6) est un métal.
  7. Base-Bleed (11) selon la revendication 6, caractérisé par le fait que le métal est une tôle souple.
  8. Base-Bleed (11) selon l'une quelconque des revendications 1 à 7, caractérisé par le fait que le dispositif (4) est conçu de telle sorte qu'il soit éjecté complètement, mais au moins en grande partie, lorsque la pression régnant dans le base-bleed (11) a atteint sa limite technique de conception après refermeture.
  9. Projectile (10) comprenant un base-bleed (11) selon l'une quelconque des revendications 1 à 8.
  10. Projectile (10) selon la revendication 9, caractérisé par le fait qu'il est un projectile d'artillerie.
EP19178395.0A 2018-06-22 2019-06-05 Générateur de type base-bleed et projectile doté d'un générateur de type base-bleed Active EP3587995B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018115080.6A DE102018115080A1 (de) 2018-06-22 2018-06-22 Base-Bleed und Geschoss mit einem Base-Bleed

Publications (2)

Publication Number Publication Date
EP3587995A1 EP3587995A1 (fr) 2020-01-01
EP3587995B1 true EP3587995B1 (fr) 2024-01-24

Family

ID=66770325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19178395.0A Active EP3587995B1 (fr) 2018-06-22 2019-06-05 Générateur de type base-bleed et projectile doté d'un générateur de type base-bleed

Country Status (6)

Country Link
EP (1) EP3587995B1 (fr)
DE (1) DE102018115080A1 (fr)
ES (1) ES2972429T3 (fr)
FI (1) FI3587995T3 (fr)
HU (1) HUE065511T2 (fr)
PL (1) PL3587995T3 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3246380A1 (de) * 1982-12-15 1984-06-20 Diehl GmbH & Co, 8500 Nürnberg Vorrichtung zur reduzierung des bodenwiderstandes bei geschossen
DE4018385C2 (de) * 1990-06-08 1996-03-28 Rheinmetall Ind Gmbh Unterkalibriges Wuchtgeschoß für Übungszwecke
SE508403C2 (sv) * 1996-12-15 1998-10-05 Gunners Nils Erik Basflödesaggregat
DE19751932C2 (de) * 1997-11-22 2001-04-19 Rheinmetall W & M Gmbh Gasgenerator zur Reichweitensteigerung eines Geschosses und Geschoß mit Gasgenerator
FR2882430B1 (fr) * 2005-02-21 2007-03-30 Giat Ind Sa Projectile d'artillerie comportant une ceinture
WO2011014806A1 (fr) * 2009-07-31 2011-02-03 Raytheon Company Carénage pouvant être déployé et procédé pour réduire la traînée aérodynamique sur un obus d'artillerie lancé par un canon
US8362408B2 (en) * 2009-10-22 2013-01-29 Honeywell International Inc. Steerable projectile charging system
DE102017105565A1 (de) 2017-03-15 2018-09-20 Rheinmetall Waffe Munition Gmbh Munitions- und Logistikkonzept für insbesondere Artilleriegeschosse

Also Published As

Publication number Publication date
HUE065511T2 (hu) 2024-05-28
EP3587995A1 (fr) 2020-01-01
FI3587995T3 (fi) 2024-03-01
DE102018115080A1 (de) 2019-12-24
ES2972429T3 (es) 2024-06-12
PL3587995T3 (pl) 2024-05-27

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