Device for preparing nanometer metal powder by continuous wire electric explosion

Abstract

Continuous wire electric explosion preparation device for nano-metal powder, the electric explosion chamber (24) is equipped with an inlet valve (14) and an air outlet valve (15), the electric explosion device is installed in the electric explosion chamber (24), and the electric motor (25) Drive the wheel (11) to rotate, the metal wire (17) is fixed on the wheel (11) by the pressing and lifting rod mechanism, the metal wire (17) is continuously fed by the wire feeding mechanism, and the two poles of the energy storage capacitor are connected to the high voltage generator , the pressing bar plate (21) and the lifting bar plate (9) are installed on the support plate (23), the pressing bar (12) is connected with the wheel disc (11) through the pressing bar rotating shaft (26), and the pressing bar (12) can Rotate around the pressing rod rotating shaft (26), the wire reel (1), the buffer spring (4), and the wire guide wheel (6) are all installed on the support plate (23), and the wire guide wheel (6) is provided with a V-shaped Groove, make metal wire (17) can enter in the V-shaped gap (29) that the bottom on the wheel disc (11) is arc-shaped in the feeding process.

Description

technical field [0001] The invention relates to nano powder preparation equipment, and in particular provides a device for preparing nano metal powder by continuous wire electric explosion. Background technique [0002] In the prior art, there are many methods for preparing nano-powders, and wire electric explosion method is one of them. Wire electric explosion is to apply a high voltage to the wire conductor in a certain medium or vacuum to generate a strong pulse current instantly, so that the wire conductor melts, gasifies, expands, and explodes in a short time. The explosive products are sputtered around at high speed under the action of the explosion shock wave, and form nano-powder after free cooling. The preparation of nano-powder by electric explosion has the advantages of high energy utilization rate, adjustable process parameters, controllable powder particle size, no pollution to the environment, and wide range of applicable materials. [0003] At present, most ...

AI Technical Summary

Problems solved by technology

However, the experiment found that during the process of the metal wire falling by gravity, it was disturbed by the flow of the circulating gas medium in the explosion chamber, and the metal wire could not be stably and reliably fed between the two electrodes, so that the explosion could not occur smoothly, which hindered the electric explosion of the metal wire. The process is carried out continuously, and the metal wire used in the electric explosion must be straightened before being put into the thin-walled tube, which increases the workload and reduces the production efficiency

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