WU Zhen^1a,WANG Liqiang¹,XU Limin²,GAO Weijun²

(1.a.School of Mechanical Engineering,b.Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University,Wuxi 214122,China;2.Jiangsu Innovative Packaging Technology Co.,Ltd,Yangzhou 225600,China)

Abstract：In order to explore the vibration discharge characteristics of fine powders in a conical silo,three different fine powders,titanium dioxide,nano calcium carbonate,and silica,were used as experimental materials to conduct vibration discharge experiments in a self-built conical silo.The effects of material level height,vibration intensity,vibrator position,and outlet diameter on the discharge of fine powders were quantitatively studied.The impact of different factors on mass flow rate was analyzed through orthogonal experiments.The results show that when the material level height of the powder is located at the lower cone,the mass flow rate gradually increases with the increasing of the material level height.When the material level height is located at the upper silo,the material level height has almost no effect on the mass flow rate of the discharged material.The results indicate that the better the flowability of the powder,the better its vibration unloading effect.The increase in vibration intensity has a trend of first increasing and then decreasing in mass flow rate,and the stability of discharge will decrease with the increasing in vibration intensity.When the vibrator is located close to the discharge port,the mass flow rate is maximum,and improving the vibration intensity can achieve discharge when the vibrator is far away from the discharge port.Increasing the diameter of the discharge port exponentially increases the mass flow rate.Different powders have different critical discharge port diameters,and increasing vibration intensity can reduce the critical discharge port diameter of powders.The range analysis shows that the sequence of factors affecting fine powder vibration discharge is：vibrator position,discharge port diameter,and vibration intensity.

Keywords：fine powder;conical silo;vibration discharge;mass flow rate

Get Citation: WU Z,WANG L Q,XU L M,et al.Vibration unloading characteristics of fine powder cone silo[J].China Powder Science and Technology,2023,29(3)：117-126.

Received： 2023-02-14,Revised：2023-03-27,Online：2023-04-27 11:55。

Funding Project：中央高校基本科研业务费专项资金,编号：JUSRP21115;江苏省食品先进制造装备技术重点实验室自主资助基金资助项目,编号：FMZ201902。

First Author：吴震(1998—),男,硕士研究生,研究方向为包装工艺与机械。E-mail：wzhen19980718@163.com。

Corresponding Author：王利强(1977—),男,教授,博士,博士生导师,研究方向为包装机械。E-mail：wlqcom@163.com。