Dynamic Modeling and Parameter Optimization of Double Mass Vibration Mill

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (9) : 59-65.

JIA Minpin1 ZHOU Hao1 YANG Xiaolan2 LIU Jifeng2 WANG Zhen2

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Abstract

For the needs of modelling and dynamic parameter optimization design of vibration grinding system with multi freedoms, dynamic equations with 6 freedoms based on Lagrange equation are established. The dynamic response of double mass vibration mill is obtained using numerical analysis method and the model is proved to be effective by vibration test. The relationship of double mass vibration mill’s dynamic characters and rotation speed is studied with the help of established model. And it is shown that the vibration intensity would increase while the rotation speed gets fast, but the amplitude of vibration would shrink. In order to achieve the better result of grinding, the excitation parameter is optimized. With the help of modal analysis, natural frequency and vibration type of system are obtained. The upper limit of rotation speed is determined by the resonance frequency and the lower limit is gotten by the vibration intensity. Then the optimum range of rotation speed is determined. A grinding test with diamond power is carried out on the model machine. The result shows that the average size of output power is 0.27 µm. And its size has met the requirements of ultrafine powder. This optimization really does good to dynamic design and product development of vibration mill for ultrafine comminution.

Key words

Vibration mill / Dynamic model / Excitation frequency / Parameter optimization / Ultrafine comminution

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JIA Minpin1 ZHOU Hao1 YANG Xiaolan2 LIU Jifeng2 WANG Zhen2. Dynamic Modeling and Parameter Optimization of Double Mass Vibration Mill[J]. Journal of Vibration and Shock, 2016, 35(9): 59-65

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