EP0242501B1 - Vorrichtung zur Beschleunigung von Projektilen durch ein elektrisch aufgeheiztes Plasma - Google Patents

Vorrichtung zur Beschleunigung von Projektilen durch ein elektrisch aufgeheiztes Plasma Download PDF

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Publication number
EP0242501B1
EP0242501B1 EP87100187A EP87100187A EP0242501B1 EP 0242501 B1 EP0242501 B1 EP 0242501B1 EP 87100187 A EP87100187 A EP 87100187A EP 87100187 A EP87100187 A EP 87100187A EP 0242501 B1 EP0242501 B1 EP 0242501B1
Authority
EP
European Patent Office
Prior art keywords
plasma
electrode
projectile
barrel
electrically heated
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
Application number
EP87100187A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0242501A1 (de
Inventor
Wolfram Dr. Witt
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 Industrie AG
Original Assignee
Rheinmetall GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rheinmetall GmbH filed Critical Rheinmetall GmbH
Publication of EP0242501A1 publication Critical patent/EP0242501A1/de
Application granted granted Critical
Publication of EP0242501B1 publication Critical patent/EP0242501B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B6/00—Electromagnetic launchers ; Plasma-actuated launchers

Definitions

  • the present invention relates to a device for accelerating projectiles located in a tube closed on one side by an electrically heated plasma with the features of the preamble of claim 1.
  • a particularly disadvantage of these known devices is that a relatively large initial volume is required in which the plasma is generated and heated.
  • the present invention was therefore based on the object of further developing a device of the type mentioned at the outset so that the initial volume in which the plasma is generated and heated is as small as possible.
  • a known acceleration device is shown again, such as that from the Goldstein et. al. is described in more detail.
  • Fig. 1 denotes a tube which is closed on one side and on the tube bottom of which the closure is located a first electrode 2 is arranged.
  • a second electrode 3 (ring electrode) arranged electrically insulated from the first 'electrode is connected to the first electrode 2 via a voltage source 4 and a switch.
  • the two electrodes 2 and 3 define a plasma chamber designated 6 in the tube 1, which is initially closed in the area of the ring electrode 3 by a projectile 7 to be accelerated.
  • this device has the disadvantage that the plasma chamber 6 has a relatively large volume in which the driving pressure builds up relatively slowly.
  • FIGS. 2 and 3 show the embodiment of a device according to the invention, which manages with a slit-shaped plasma space.
  • the tube of a plasma cannon is designated, which at the same time forms the ring electrode 100 at its closure-side end.
  • the coaxial central electrode is identified by 11 and the insulating body between central electrode 11 and ring electrode 100 is identified by 12.
  • Part of the inner surface of the tube 10 is at the closure end with a burn-off contact material 13, for. B. lined with a sintered material of tungsten and Kopfer.
  • the projectile 14, the inner wall of the ring electrode 100 and the coaxial central electrode form a gap-shaped discharge space 15.
  • the acceleration process is initiated by closing the switch 5 (FIG. 3) by a discharge which is formed in the narrow gap 15 between the projectile 14 and the insulating piece 12 or the coaxial central electrode 11.
  • material is vaporized and heated predominantly in the base areas of the hot arc.
  • further material is evaporated due to the close contact of the arc with the walls of the gap.
  • the resulting pressure drives the projectile 14 towards the pipe end.
  • a plasma 16 forms in the increasing plasma space behind the projectile 14.
  • FIG. 4 shows a simplified circuit diagram for operating the plasma cannon according to the invention.
  • the schematically illustrated plasma cannon was designated 9 and the simplified circuit diagram was designated 20.
  • a drive for. B. a motor powered by a liquid fuel
  • 22 denotes a DC generator.
  • the voltage generated by the direct current generator is fed via switch 23 to a capacitor 24, which acts as a capacitive energy store.
  • the capacitance 24 is connected on the one hand via a switch 25 to the first electrode 11 and on the other hand via a current-limited inductor 27 to the second electrode 10.
  • the capacitance 24 can be short-circuited via a switch 26.
  • the capacitive energy store 24 is charged to the voltage Uo.
  • the energy store discharges via the inductor 27 and via the plasma in the accelerator.
  • the short-circuit switch 26 is closed. The decreasing current flow through the accelerator plasma is then maintained by the inductance of the coil 27.
  • the mode of operation of the plasma cannon does not essentially depend on the gap 15 between the projectile 14 and the coaxial electrode 10 (cf. FIGS. 2 and 3).
  • the gap-shaped intermediate space 15 can also be filled with a slightly gassing material (e.g. polyethylene).
  • a slightly gassing material e.g. polyethylene
  • light-gassing materials are substances that break down into molecules (gases) with a low molecular weight (molecular weight ⁇ 30) under the effect of the arc discharge. The additional material evaporation of this substance controls the energy conversion in the plasma and the plasma pressure increases, so that the projectile leaves the tube 10 at a higher speed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • Plasma Technology (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vending Machines For Individual Products (AREA)
EP87100187A 1986-04-19 1987-01-09 Vorrichtung zur Beschleunigung von Projektilen durch ein elektrisch aufgeheiztes Plasma Expired EP0242501B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3613260 1986-04-19
DE19863613260 DE3613260A1 (de) 1986-04-19 1986-04-19 Vorrichtung zur beschleunigung von projektilen durch ein elektrisch aufgeheiztes plasma

Publications (2)

Publication Number Publication Date
EP0242501A1 EP0242501A1 (de) 1987-10-28
EP0242501B1 true EP0242501B1 (de) 1989-02-15

Family

ID=6299059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100187A Expired EP0242501B1 (de) 1986-04-19 1987-01-09 Vorrichtung zur Beschleunigung von Projektilen durch ein elektrisch aufgeheiztes Plasma

Country Status (5)

Country Link
EP (1) EP0242501B1 (enrdf_load_stackoverflow)
JP (1) JPS62252897A (enrdf_load_stackoverflow)
DE (2) DE3613260A1 (enrdf_load_stackoverflow)
ES (1) ES2006680B3 (enrdf_load_stackoverflow)
NO (1) NO870472L (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042359A (en) * 1988-04-28 1991-08-27 Rheinmetall Gmbh Projectile accelerating device
DE3814330C2 (de) * 1988-04-28 1997-05-15 Rheinmetall Ind Ag Elektrothermische Beschleunigungsvorrichtung
DE3814332C2 (de) * 1988-04-28 1997-05-15 Rheinmetall Ind Ag Vorrichtung zur Beschleunigung von Projektilen
DE3816300A1 (de) * 1988-05-13 1989-11-23 Tzn Forschung & Entwicklung Kartusche fuer elektrothermische abschussvorrichtungen
DE3820492A1 (de) * 1988-06-16 1989-12-28 Diehl Gmbh & Co Rohrwaffe mit chemisch-elektrischem hybridantrieb mittels regenerativer treibmitteleinspritzung
DE3830902C1 (enrdf_load_stackoverflow) * 1988-09-10 1992-04-09 Diehl Gmbh & Co, 8500 Nuernberg, De
CA2001310C (en) * 1988-10-24 2002-01-08 W. Clay Reeves Switch for portable light source
JPH02127992U (enrdf_load_stackoverflow) * 1989-03-29 1990-10-22
DE3910566A1 (de) * 1989-04-01 1990-10-04 Diehl Gmbh & Co Vorrichtung zum beschleunigen eines projektils mittels eines plasmas
JPH0350498A (ja) * 1989-07-14 1991-03-05 Japan Steel Works Ltd:The 飛しょう体発射装置
DE3924056A1 (de) * 1989-07-21 1991-01-24 Diehl Gmbh & Co Vorrichtung zur beschleunigung von projektilen durch ein elektrisch aufgeheiztes plasma
DE4132657C2 (de) * 1991-10-01 1996-02-08 Tzn Forschung & Entwicklung Elektrothermische Abschußvorrichtung und Kartusche zur Verwendung in derartigen Vorrichtungen
ATE217075T1 (de) * 1995-09-28 2002-05-15 Injectiles Ltd Abschussgerät für flüssiges projektil
WO2019221775A2 (en) 2017-10-24 2019-11-21 Science Applications International Corporation Projectile accelerator with heatable barrel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916761A (en) * 1974-01-29 1975-11-04 Nasa Two stage light gas-plasma projectile accelerator
US3939816A (en) * 1974-07-12 1976-02-24 The United States Of America As Represented By The National Aeronautics And Space Administration Office Of General Counsel-Code Gp Gas filled coaxial accelerator with compression coil
US4534263A (en) * 1982-07-19 1985-08-13 Westinghouse Electric Corp. Electromagnetic launcher with high repetition rate switch
DE3321034A1 (de) * 1983-06-10 1984-12-13 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Elektromagnetische kanone

Also Published As

Publication number Publication date
DE3613260C2 (enrdf_load_stackoverflow) 1989-12-28
JPS62252897A (ja) 1987-11-04
EP0242501A1 (de) 1987-10-28
DE3613260A1 (de) 1987-10-29
NO870472L (no) 1987-10-20
NO870472D0 (no) 1987-02-06
DE3760053D1 (en) 1989-03-23
ES2006680B3 (es) 1993-08-01

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