基于物料运动特性的旋回破碎机生产率分析

摘要

为研究旋回破碎机动锥低速运转状态下对散体物料的破碎性能并改善破碎腔型，结合物料在破碎腔内的运动和力学特性，提出了破碎机生产率计算方法。从分层破碎原理出发，基于破碎腔几何结构，研究物料在排料和挤压半周期的运动形式，并对运动轨迹进行绘制；再根据物料在阻塞层的上拱速度和排料速度对生产率进行求解，并以PXF6089旋回破碎机为算例，进行离散元方法和实际生产验证。仿真及物理实验证明该计算方法可行。%For investigating the bulk material breakage performance of gyratory crusher under the low speed of mantle and improving the structure of crushing chamber,combining with the kinematic and dynamic characteristics of materials,a calculation method of productivity was proposed.On the basis of Layered breakage theory and the structure of crushing chamber,the bulk material motion forms of discharge and compressive half cycle were researched and the traj ectories were draw.Produc-tivity was solved based on the materials velocity of upward and downward in the choke layer.Numeri-cal results of PXF6089 gyratory crusher were presented.The data of actual production and discrete el-ement method were adopted to verify the results accuracy.Simulation results and physical experimen-tal results show the calculation method is accurate.