【摘要】：為提高磨機處于瀉落運動時介質(zhì)的活性,以增強介質(zhì)對物料的剪切研磨作用,對變轉(zhuǎn)速球磨機的波動頻率開展了研究.根據(jù)球磨電動機的負(fù)載特性和筒壁介質(zhì)的動態(tài)變速響應(yīng)特性,從理論上獲得了變轉(zhuǎn)速球磨機的最大波動頻率計算式.通過球磨機介質(zhì)運動仿真,對不同波動頻率下介質(zhì)群與筒體的轉(zhuǎn)差率和介質(zhì)切向能耗占比的分析得出采用較低波動頻率就能增強介質(zhì)對顆粒的剪切研磨作用.恒轉(zhuǎn)速和變轉(zhuǎn)速的粉磨實驗結(jié)果表明:變轉(zhuǎn)速能提高球磨機的粉磨效率,轉(zhuǎn)速波動頻率越高單位時間產(chǎn)率越大,研究結(jié)果為變轉(zhuǎn)速球磨機波動頻率的設(shè)定提供了理論依據(jù).
[Abstract]:In order to improve the activity of the medium when the mill is in the dripping motion and to enhance the shear grinding effect of the medium on the material, the fluctuation frequency of the ball mill with variable speed is studied. According to the load characteristics of ball mill motor and the dynamic variable speed response of cylinder wall, the formula for calculating the maximum wave frequency of ball mill with variable speed is obtained theoretically. Through the simulation of the medium motion of the ball mill, the difference rate between the medium group and the cylinder body and the percentage of tangential energy consumption under different wave frequencies are analyzed. It is concluded that the shear grinding effect of the medium on the particles can be enhanced by using the lower wave frequency. The experimental results of grinding with constant speed and variable speed show that variable rotation speed can improve the grinding efficiency of ball mill, and the higher the speed fluctuation frequency, the greater the yield per unit time. The research results provide a theoretical basis for the setting of fluctuating frequency of variable speed ball mill.
【作者單位】： 浙江工業(yè)大學(xué)機械工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(51675484;51275471;51505424) 浙江省自然科學(xué)基金資助項目(LZ12E05002;LY15E050019)
【分類號】：TD453

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