EP0156763B1 - Verfahren und Vorrichtung zur Erhöhung der Energie in einem elektromagnetischen Zündsystem - Google Patents

Verfahren und Vorrichtung zur Erhöhung der Energie in einem elektromagnetischen Zündsystem Download PDF

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Publication number
EP0156763B1
EP0156763B1 EP85810045A EP85810045A EP0156763B1 EP 0156763 B1 EP0156763 B1 EP 0156763B1 EP 85810045 A EP85810045 A EP 85810045A EP 85810045 A EP85810045 A EP 85810045A EP 0156763 B1 EP0156763 B1 EP 0156763B1
Authority
EP
European Patent Office
Prior art keywords
generator
detonating
facing
end position
acceleration
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
EP85810045A
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German (de)
English (en)
French (fr)
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EP0156763A1 (de
Inventor
Robert Rehmann
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.)
Uhde Inventa Fischer AG
Original Assignee
EMS Inventa AG
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Filing date
Publication date
Application filed by EMS Inventa AG filed Critical EMS Inventa AG
Priority to AT85810045T priority Critical patent/ATE36601T1/de
Publication of EP0156763A1 publication Critical patent/EP0156763A1/de
Application granted granted Critical
Publication of EP0156763B1 publication Critical patent/EP0156763B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/04—Electric fuzes with current induction

Definitions

  • the invention relates to a method for increasing the energy in an electromagnetic ignition system of relatively low-accelerated ammunition bodies, wherein a coil with a coaxially movable magnetic core is arranged in an ignition generator for which a rear-side impact body is provided in a lower housing of the ignition system. and wherein the reaction acceleration moves a reaction part that is mechanically secured in its rest position relative to its stator, and the resulting electrical energy induced in the coil is stored in a capacitor and made available to ignite an electrical squib, and a device for carrying out the method .
  • Projectile ignition systems which contain a generator and move a reaction part during acceleration through a coil reinforced with an iron core in order to provide the required ignition energy via a capacitor.
  • An arrangement is known (CH-A-356 045) in which a permanent magnet is movably mounted within a coil which is surrounded by a magnet. The magnet is fixed in the rest position by means of a contact pin in the recess of an insulator. When the projectile is fired, the pin is released due to the acceleration, the magnetic field of the magnet moves through the coil and charges a capacitor, which stores the ignition energy until it strikes.
  • DE-A-1 936 878 contains an electromagnetic ignition system, but the coil with the magnetic core is fastened in the rest position of the ammunition in the rear position, so that the acceleration of the ignition generator corresponds to the acceleration of the ammunition body.
  • the ignition generator is fixed in the housing so that in the event of vibrations or improper manipulation, the movable permanent magnet can break through the locking plate and thus induce the voltage in the coil.
  • DE-B-1 140 843 also describes and shows a projectile detonator with an inertia generator.
  • the position of the generator is secured with a plate on which a screw is supported. When accelerating, the screw penetrates the plate and the ignition generator hits the hollow pin.
  • the magnetic core is set in motion, which was previously held at rest with a wire.
  • the ignition generator moves only a very short distance up to the impact, which is given by the length of the screw mentioned above. It is more likely to be braked due to the energy used to break through and the friction of the screw. There is no spring-loaded mounting of the ignition generator, which should prevent damage during manipulation.
  • US-A-3 207 075 shows a rotor arrangement which is arranged in the pyrotechnic chain of the ignition system.
  • the object of the invention is to provide a method which provides a sufficiently high ignition energy at low acceleration of an ammunition body.
  • Another object is to provide an ignition device which ensures a high degree of safety both when manipulating and when firing the ammunition body.
  • the above-mentioned object is achieved in that the ignition generator is held resiliently in the first, target-side end position, at the time of firing by a spring force and is secured against vibrations and damage to the ignition system, and is located in the upper target-side housing at a distance of the acceleration distance from the rear-side impact -Body is located, the acceleration path is dimensioned so that the acceleration energy of the magnetic body induces more energy in the coil when it hits it, than is necessary for the functioning of the ignition system, that after the onset of the launch acceleration, the ignition generator due to its persistent forces coaxially into a second , rear end position is moved so that its acceleration increases during the path between the first, target-side and the second, rear-side end position and that the rear-side reaction part of the magnetic core on the verse with a central bore
  • the impact body opens that a mechanical safety device for the reaction part is unlocked here and this magnetic core is accelerated with respect to the coil, whereby electrical energy is generated in the coil, and that the ignition generator is returned to its first end
  • the advantage of the invention is that after the launch acceleration has started, it is necessary to ignite the electrical detonator Such energy is generated directly when the shot is fired, specifically by the ignition generator itself. This is accelerated over a predetermined start-up distance over a certain period of time and hurled onto an impact body (anvil) provided with a bore. When it hits the anvil, the magnetic core moves and the ignition generator generates a voltage surge, thus charging the capacitor in the ignition generator itself. At the end of the acceleration phase, the ignition generator is pushed back into the starting position by spring force and, in conjunction with other safety devices, releases its energy at the right time for ignition.
  • the spring which in the rest position holds the ignition generator in the first, target-oriented end position, simultaneously functions as an attenuator and dampens possible vibrations in the event of incorrect manipulation or in the event of a projectile falling, so that this resilient mounting not only protects the ignition generator from damage to the Ignition system protects, but also increases the functional safety of this part significantly.
  • the ignition generator is moved together with the mechanically and / or electrically secured ignition system in the housing by inertial forces and in the opposite direction by the force of the compression spring, and that the ignition generator and the ignition system are moved together between the target-side first end position and the rear end position are moved.
  • the compression spring is adapted in accordance with the increased movable mass. Increasing the moving mass also increases the acceleration energy on impact.
  • the ignition generator is guided axially in a time interval in a bore and in its end positions, limited over a predetermined distance.
  • the distance is dimensioned so that a sufficiently high induced voltage is obtained when the coil hits.
  • the ignition generator is advantageously held in a target-oriented, first end position by a spring force and the corresponding compression spring is selected such that a launch acceleration of 100 to 300 g. S - 2 while the ignition generator is brought into its second, rear-side end position for at least 3 ms.
  • the device according to claim 5 is that the ignition generator is mounted in a housing by a compression spring in the bore in a first end position, has a contact pin which is telescopically movable in a contact sleeve and with the rotor located in a housing which carries a squib and which can be turned from a safety position into a reinforced position, is electrically connected in this first end position.
  • This device is particularly inexpensive in terms of safety. It prevents premature electrical preparation of the projectile for the explosion, since the electrical connection to the squib carrier is interrupted by «lifting off the contact pin even at low launch acceleration.
  • an advantageous development according to claim 6 is that the acceleration distance of the ignition generator with respect to the housing of the ignition system is greater than the acceleration distance of the magnetic core with respect to the coil.
  • the increasing acceleration is exploited over a longer distance, which then causes an increase in the induced voltage when the coil hits by a faster movement of the magnetic core.
  • the ignition generator is arranged to be movable in the longitudinal direction in a threaded lower housing and the secured ignition system is fixedly mounted in an upper housing.
  • This variant therefore only calculates the acceleration of the actual ignition generator, with sufficient electrical energy being induced for the ignition system in this case too.
  • the ignition generator is fastened together with the secured ignition system in insulating sleeves and the insulating sleeves are slidably mounted in a housing in the longitudinal direction.
  • This variant means a simplification of the design and the moveable mass that is to trigger the ignition is greater with the technically necessary components.
  • At least two peripheral recesses are provided in the cylindrical bore of the lower housing. They serve to reduce the friction of the ignition generator on the housing wall during its acceleration and prevent jamming in the bore. The air in the borehole can be displaced without difficulty.
  • the recesses are made symmetrically.
  • four symmetrically arranged recesses have proven successful.
  • the ignition generator can slide largely frictionlessly on the remaining surfaces of the bore.
  • an impact body is contained in a compression body in the lower part of the lower housing.
  • the impact body serves as an anvil.
  • the impact body has a central bore.
  • This central hole allows a reaction part that is movable with the magnetic core to penetrate upon impact. It has an expediently conical opening, which allows a safe penetration even with greater tolerance of the axial guidance of the reaction part.
  • an ignition system is designated by 1.
  • An upper housing 2 is provided with at least one fastening part 2 'and is screwably connected to a lower housing 3 of smaller diameter.
  • the upper housing 2 of the ignition system 1 carries a threaded ring 4 and a cylindrical pin 5.
  • a rotor 7 is installed in a security element 8 in an insulating sleeve 6.
  • the rotor 7 has a bore 7 'and contains a known electrical squib 9, which is provided with a pole pin 9'. In the secured state, this is across the ignition chain. Two locks, not shown, prevent the rotor 7 from rotating prematurely and closing the ignition chain.
  • a threaded bore 10 is provided for receiving a detonator (booster).
  • a further bore 11 is provided in the security element 8, which serves to center a telescopic contact pin 12, which is attached in a contact sleeve 13 of an ignition generator 14.
  • a conductive contact surface 15 is provided between the ignition generator 14 and the insulating sleeve 6.
  • a reaction part 16, which forms the lower pole piece, is indicated in the elevation of the ignition generator 14.
  • a disc 17 is held by means of a compression spring 18.
  • the compression spring 18 is fixed with a holder 17 'and also has the function of an attenuator, so that any vibrations or an impact when the ammunition body falls cannot cause damage to the ignition system.
  • the compression spring 18 is wedged in a recess 19 between a compression body 20 and the cylinder wall of the lower housing 3.
  • the upsetting body 20, which has an empty space 20 ′, is made of lead and is used to fasten an impact body 21 (anvil) in which a wedge-shaped central bore 22 is formed.
  • FIG. 2 shows a top view of the bore 23 of the lower housing 3.
  • the outer edge is formed by a thread 24.
  • peripheral recesses 3 ' In the inner surface of the bore 23 there are peripheral recesses 3 '. 2 shows four such peripheral recesses 3 '.
  • the ignition generator 14 has in its upper part a dielectric 25, for example made of hardened araldite (brand from Ciba Geigy AG), in which a capacitor 26 and a diode 27 are embedded.
  • a dielectric 25 for example made of hardened araldite (brand from Ciba Geigy AG)
  • a capacitor 26 and a diode 27 are embedded.
  • a coil 28 which encloses a magnetic core 29 between the reaction part 16 as the lower pole piece and a part 30 as the upper pole piece.
  • the upper part and the lower part are separated from one another by a disk 31.
  • the ignition generator 14 is surrounded by a housing 32, from which the contact pin 12 protrudes.
  • FIG. 4 shows the characteristic course of an acceleration curve of an ammunition body.
  • the course of the acceleration b as a function of the time t is shown.
  • the ammunition body with the ignition system according to the invention is at rest in a first position t o .
  • the ignition generator 14 moves into a second end position t ", the tip of the reaction part 16 striking the central bore 22 in the rear lower housing part 3.
  • the ignition generator 14 slides on the edges of the recesses 3 as it accelerates The air cannot be compressed since it can escape quickly enough through the channels formed by the recesses 3.
  • the ignition generator 14 is moved into its first end position by means of the compression spring 18 returned, which it reaches at time t 2.
  • the acceleration b is constant, at time t 4 the igniter is armored and the ignition takes place at time t 5. The ignition occurs when it hits the target, the double hood of an ammunition body pressed in and the ignition circuit is closed.
  • FIG. 5 and 6 show the second copy, for example. 5, the device is in the secured state
  • FIG. 6 shows the state of the device when fired.
  • a one-piece housing 33 is provided with a cover 34. This cover 34 has an opening 35.
  • the security element 8 is provided with an insulating washer 36 which has an opening 37.
  • a disk 39 is arranged under the ignition generator 14 and is provided with an opening 40. This disc 39 serves as an upper support for the compression spring 18 and corresponds to the disc 17 from FIG. 1.
  • the upper end of the compression spring 18 is secured by an annular holder 41.
  • the squib 9 arranged in the rotor 7 is mounted with the pole pin 9 '.
  • the pole pin 9 ' is located in the bore 7' in the rotor 7.
  • a locking pin 42 engages in the area of the rotor.
  • the security element 8 is provided on the lower side with an insulating washer 43.
  • the one-piece housing 33 has a fastening flange 44.
  • the ignition generator 14 is located in a lower insulating sleeve 45 which is fixedly connected to the upper insulating sleeve 6, so that the safety element 8 and the ignition generator 14 form a unit (FIGS. 5, 6).
  • the second example also contains an impact body 21 which is mounted in an upsetting body 20.
  • the electrical ignition system according to the invention is specially designed for low accelerations, as they also occur with rocket-powered ammunition.
  • the capacitor 26 of the ignition generator 14 discharges in about 10 minutes; the result is an energy-free dud.
  • the solution according to the invention enables the creation of autonomous ignition systems which are functional independently of secondary supplies (batteries, etc.).
  • the electrical energy provided is sufficient to supply electrical safety devices, timers (• timers •) and proximity sensors with energy in addition to the safe ignition of so-called thin-film pills.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • General Induction Heating (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP85810045A 1984-02-24 1985-02-07 Verfahren und Vorrichtung zur Erhöhung der Energie in einem elektromagnetischen Zündsystem Expired EP0156763B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810045T ATE36601T1 (de) 1984-02-24 1985-02-07 Verfahren und vorrichtung zur erhoehung der energie in einem elektromagnetischen zuendsystem.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH919/84 1984-02-24
CH919/84A CH669454A5 (enrdf_load_stackoverflow) 1984-02-24 1984-02-24

Publications (2)

Publication Number Publication Date
EP0156763A1 EP0156763A1 (de) 1985-10-02
EP0156763B1 true EP0156763B1 (de) 1988-08-17

Family

ID=4198224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810045A Expired EP0156763B1 (de) 1984-02-24 1985-02-07 Verfahren und Vorrichtung zur Erhöhung der Energie in einem elektromagnetischen Zündsystem

Country Status (6)

Country Link
US (1) US4637311A (enrdf_load_stackoverflow)
EP (1) EP0156763B1 (enrdf_load_stackoverflow)
AT (1) ATE36601T1 (enrdf_load_stackoverflow)
CH (1) CH669454A5 (enrdf_load_stackoverflow)
DE (1) DE3564489D1 (enrdf_load_stackoverflow)
ZA (1) ZA85708B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10241724B4 (de) * 2002-09-10 2007-06-14 Diehl Bgt Defence Gmbh & Co. Kg Elektrogeneratorische Zündeinrichtung für einen Explosivkörper

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH678107A5 (enrdf_load_stackoverflow) * 1988-12-12 1991-07-31 Inventa Ag
EP1281929A1 (de) 2001-08-02 2003-02-05 RUAG Munition Elektrisch initiierter Munitionszünder erhöhter Systemsicherheit
US7231874B2 (en) * 2001-09-05 2007-06-19 Omnitek Partners Llc Power supplies for projectiles and other devices
AU2002252924A1 (en) 2002-05-13 2003-11-11 Ruag Munition Percussion fuse
US6779457B2 (en) 2002-05-17 2004-08-24 Ruag Munition Percussion fuse (ignition device)
US6835592B2 (en) * 2002-05-24 2004-12-28 Micron Technology, Inc. Methods for molding a semiconductor die package with enhanced thermal conductivity
US7696673B1 (en) 2006-12-07 2010-04-13 Dmitriy Yavid Piezoelectric generators, motor and transformers
CA2857656C (en) * 2012-02-29 2017-07-11 Detnet South Africa (Pty) Ltd Electronic detonator
US10088288B1 (en) 2016-10-06 2018-10-02 The United States Of America As Represented By The Secretary Of The Army Munition fuze with blast initiated inductance generator for power supply and laser ignitor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035520A (en) * 1955-01-24 1962-05-22 Robert E Koeppen Inertia actuated electric unit
US3207075A (en) * 1959-01-23 1965-09-21 Robert H Semenoff Out-of-line rocket igniter
FR1251730A (fr) * 1959-03-19 1961-01-20 Rheinmetall Gmbh Générateur d'impulsions de courant, en particulier pour l'allumage de charges explosives et de charges propulsives
NL122447C (enrdf_load_stackoverflow) * 1959-10-30
NL261509A (enrdf_load_stackoverflow) * 1960-03-01
NL261522A (enrdf_load_stackoverflow) * 1960-03-03
CH476285A (fr) * 1968-07-25 1969-07-31 Brev Electro Mecaniques S A Be Dispositif d'allumage électrique pour projectile détonant
CH578723A5 (enrdf_load_stackoverflow) * 1974-05-10 1976-08-13 Oerlikon Buehrle Ag
CH589839A5 (enrdf_load_stackoverflow) * 1975-03-14 1977-07-15 Oerlikon Buehrle Ag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10241724B4 (de) * 2002-09-10 2007-06-14 Diehl Bgt Defence Gmbh & Co. Kg Elektrogeneratorische Zündeinrichtung für einen Explosivkörper

Also Published As

Publication number Publication date
DE3564489D1 (en) 1988-09-22
CH669454A5 (enrdf_load_stackoverflow) 1989-03-15
EP0156763A1 (de) 1985-10-02
US4637311A (en) 1987-01-20
ATE36601T1 (de) 1988-09-15
ZA85708B (en) 1985-10-30

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