Dual-frequency excitation two-mass vibration mill

Abstract

The invention discloses a dual-frequency excitation double-mass vibration mill which comprises an upper mass, a main vibration spring and a lower mass. The upper mass is composed of excitation vibration motors, a milling cylinder and an upper mass body. The excitation vibration motors include the near-resonance excitation vibration motor and the high-frequency excitation vibration motor. The near-resonance excitation vibration motor, the milling cylinder and the high-frequency excitation vibration motor are sequentially arranged in the horizontal direction and fixedly installed on an upper base plate of the upper mass body. One end of the milling cylinder is connected with the near-resonance excitation vibration motor, and the other end of the milling cylinder is connected with the high-frequency excitation vibration motor. The lower mass is connected with the upper mass through the main vibration spring. The upper mass, the main vibration spring and the lower mass are sequentially arranged in the perpendicular direction. The lower mass is connected with a lower base plate of the upper mass body through the main vibration spring. Large vibration intensity and large vibration amplitude can be generated at the same time through the excitation vibration motors of different excitation vibration frequencies, and therefore ultra-fine powder particles with the concentrated particle distribution and the fine particle size are obtained.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and relates to a vibration mill, in particular to a dual-frequency excitation two-mass vibration mill. Background technique [0002] Existing vibrating mills are generally composed of an exciting motor, cylinder, spring, etc. The exciting motor vibrates at a single frequency at the same time, and even the vibrating mill with multiple exciting motors is designed to vibrate synchronously. There are generally two methods of vibratory mill ultrafine grinding technology: one is large amplitude and low vibration intensity; the other is small amplitude and high vibration intensity. The large amplitude is conducive to the grinding effect, and can make the small particles with a large specific surface area obtain more energy. Through repeated fatigue, the internal defects of the powder particles are continuously aggravated, thereby further refining the powder particles, but the obtained powder ...

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Problems solved by technology

But a single frequency excitation can only provide one vibration effect at the same time

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