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将振动磨简化为一个单自由小球自由落体模型,并应用该模型进行了冲击破碎试验,测量非受限颗粒层冲击破碎时的接触力,并基于分段模型估计了接触参数。试验结果表明,有物料层的钢-物料层-钢冲击破碎,其恢复系数和接触刚度远小于无料层的钢-钢冲击,并随物料层厚度的增大而减小,但物料粒度的影响较小。该基础数据可用于振动磨的动力学分析和数值仿真计算,以指导振动磨的性能优化,具有十分重要的作用。
The vibration mill is reduced to a single free-form ball free-fall model, and the impact crushing test is carried out using this model. The contact force of the unrestricted particle layer is measured and the contact parameters are estimated based on the segmentation model. The experimental results show that the steel-material layer-steel with material layer impact-broken has a lower recovery coefficient and contact stiffness than the steel-steel without material layer impact, and decreases with the increase of material layer thickness. However, Less affected. The basic data can be used for the dynamic analysis and numerical simulation of the vibration mill to guide the performance optimization of the vibration mill, which has a very important role.