对称组合式球磨机筒体的动力学特性

Study on Dynamic Characteristics of Symmetrical Combined Ball Mill Cylinder

为减少球磨机筒体中物料死区面积提高球磨机研磨效率,设计一种全新的对称组合式球磨机筒体结构,介绍对称组合式球磨机的结构特点,建立其筒体内部物料颗粒的动力学模型,利用动力学分析软件(ADAMS)和离散元软件(EDEM)耦合模拟对称组合式球磨机工作状态,分析其筒体内部物料与研磨介质的速度和受力情况,以筒体内部速度低于0.3m/s的物料颗粒和研磨介质数量来表示物料死区面积的大小。结果表明:对称组合式球磨机筒体内部速度低于0.3m/s的物料和研磨介质数量是传统筒体结构球磨机的5.6%-29.2%;对称组合式球磨机比传统筒体结构球磨机筒体内部物料在切向和法向上的受力分别提高23.1%和20%.

In order to reduce the dead zone area of the material in the barrel of the ball mil and improve the grinding efficiency of the ball mill,a new type of symmetrical combined ball mill barrel structure was designed.The structural characteristics of the symmetrical combined ball mill were introduced.In addition,the dynamic model of the material particles inside the cylinder was established.The dynamic analysis software(ADAMS)and discrete element software(EDEM)were used to simulate the working state of the symmetric combined ball mill,and the speed and force of the material inside the cylinder and the grinding medium were analyzed,and express the size dead zone of the material with the number of material particles and grinding medium whose internal velocity is less than 0.3m/s.The results show that the number of materials and grinding media with the internal speed of the symmetric combined ball mill cylinder is less than 0.3m/s,which is 5.6%-29.2%of the traditional cylindrical structure ball mill;the symmetric combined ball mill is more than the traditional cylindrical structure ball mill cylinder internal material and the forces in the tangential and normal directions increased by 23.1%and 20%respectively.