Method for inhibiting armature transition through reducing vortex based on empennage layering

Abstract

The invention discloses a method for inhibiting armature transition of an electromagnetic rail launching device. The method is characterized in that the strength of a vortex in an armature empennage of a drive current falling section of the electromagnetic rail launching device can be reduced, and armature transition is inhibited; empennage layering is designed, and spaces between the layers are filled with C-shaped armatures made from an insulating high temperature resistant material; main structures of the armatures are processed and manufactured through 6061 aluminium alloy and are used for conducting a drive current; the interlayer insulating material is made from an epoxy resin glass fiber material, and is used for blocking the flowing path of the vortex; relative to single C-shaped armatures frequently utilized at present, the armatures have relatively large vortex impedance; and at the drive current falling section, the strength of the vortex in the armature empennage is effectively reduced, the falling speed of contact force of the armatures and rails is decreased, the armatures and the rails can keep a good electric contact state, and armature transition is inhibited. The method is high in applicability and easy to achieve, and an effective solution is provided for inhibiting transition inhibition of the electromagnetic rail launching device.

Description

technical field [0001] The invention belongs to the technical field of orbital electromagnetic emission, and relates to a method for suppressing armature transition caused by eddy current in a descending section of driving current. Background technique [0002] Armature transition generally occurs in the driving current drop section. When the driving current drops quickly, eddy currents will be generated inside the two arms of the armature, and a reverse current will be formed on the inner surface of the armature. The result is the contact pressure between the armature and the track. A rapid drop may even bend the tail of the armature to the inside of the barrel, and the armature transition occurs. The arc during the transition of the armature causes the ablation of the armature and the track, and leads to the change of the launch parameters. Therefore, the transition of the armature is an urgent problem to be solved in the electromagnetic track launcher. Suppressing the tr...

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Problems solved by technology

[0005] M. Cowan et al. used the method of introducing current from the muzzle to replace the traditional electromagnetic rail launcher that introduced current from the breech. This method of introducing current reduces the influence of the velocity skin effect on the current distribution, thereby inhibiting the formation of melting waves. , to achieve the purpose of suppressing the transition, but because the inner and outer track currents are reversed, the total magnetic field is reduced, so the electromagnetic force of this electromagnetic track launcher is smaller than that of the traditional electromagnetic track launcher under the same current

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