基于离散元法的立轴冲击式破碎机转子的结构优化

Structure Optimization of Vertical Shaft Impact Crusher Rotor Based on Discrete Element Method

为了改善立轴冲击式破碎机转子对物料的加速效果,采用离散元软件EDEM仿真分析了转子结构对物料加速效果的影响并提出了采用正交试验、离散元仿真和回归分析相结合的方法对转子结构参数进行优化。首先,通过EDEM建立立轴冲击式破碎机转子关键结构参数对物料加速效果影响的仿真模型,设计正交试验方案并进行仿真试验,再运用MATLAB软件对仿真结果进行回归分析,建立以转子抛料速度为衡量指标的物料加速效果与影响因素的关系模型,最后利用该模型对转子的结构参数进行优化,得出当转子直径为830mm、分料锥倾角为17°、导料板安装角度为38°时物料加速效果最好,为立轴冲击式破碎机转子结构的改进设计提供了理论依据。

In order to improve the material acceleration of the rotor of the vertical shaft impactcrusher,discrete element software EDEM was used to simulate and analyze the effect of rotor structure on material acceleration effect,and a method combining orthogonal test,discrete element simulation and regression analysis was proposed to optimize the rotor structure parameters.First,a simulation model of the influence of key structural parameters of vertical impact crusher rotor on material acceleration effect is established by EDEM,the orthogonal test scheme is designed and the simulation test is carried out. Then we use MATLAB software to do regression analysis for simulation results and establish a relationship model between acceleration effect and influencing factors based on rotor throwing speed.At last,the model is used to optimize the structural parameters of the rotor and concluded that the material acceleration is best when the rotor diameter is 830 mm,the dip angle of the taper is 17 and the angle of the stock guide is 38 degrees,which provides a theoretical basis for the improved design of the rotor structure of the vertical shaft impact crusher.