基于离散元法的大豆饲料粉碎机刀具材料对粉碎效果的分析与研究

Analysis on crushing effect of soybean feed mill tool material based on discrete element method

试验分析了不同大豆饲料粉碎机刀具材料对粉碎机粉碎效果的影响,对大豆饲料粉碎机,合农70大豆、齐黄35大豆和山宁17大豆进行实体测量,建立粉碎机UG模型导入EDEM软件中,并建立合农70大豆、齐黄35大豆和山宁17大豆模型进行分析,以2.6~3.5 s时间段内合农70大豆、齐黄35大豆和山宁17大豆颗粒所受的剪切力与旋转动能为评价指标,分析不同刀具材料对粉碎效果的影响。并在前期研究基础上,研究不同大豆数目、不同刀具材料对粉碎机粉碎效果的影响。仿真结果显示:合农70大豆、齐黄35大豆和山宁17大豆数目为400和1 000时,粉碎刀具材料为6CrW2Si时大豆所受的剪切力与旋转动能高于粉碎刀具材料为Cr12MoV时大豆所受的剪切力与旋转动能。刀具材料相同时,随着大豆数量的增加,合农70大豆、齐黄35大豆和山宁17大豆颗粒所受的剪切力与旋转动能均明显增加,其中大豆颗粒所受最大剪切力为160.326 N,最大旋转动能为19.758 J。试验与仿真所得结论一致,该结果为其他粉碎机刀具的材料研究设计提供理论基础与依据。

In order to analyze the effect of different cutting tool materials on the crushing effect of the mill, soybean pulverizer, Henong 70 soybean, Qihuang 35 soybean and Shanning 17 soybean were measured. The UG model of the soybean pulverizer was introduced into EDEM software, and the model of Henong 70 soybean, Qihuang 35 soybean and Shanning 17 soybean was established. The shear force and rotational kinetic energy of Henong 70 soybean, Qihuang 35 soybean and Shanning 17 soybean particles in 2.6~3.5 s time period were evaluated, and the effect of different cutting tool materials on the crushing effect was analyzed. On the basis of previous research, the e ffect of different soybean numbers and different cutting tool materials on the comminution effect of pulverizer were studied. The simulation results showed that when the number of Henong 70 soybean, Qihuang 35 soybean and Shanning 17 soybean is 400 and 1 000, the shear force and rotational kinetic energy of the soybean are higher than that of the material of grinding tool Cr12MoV when the cutting tool material is 6CrW2Si. With the same tool material, with the increase of soybean quantity, the shear force and rotational kinetic energy of Henong 70 soybean, Qihuang 35 soybean and Shanning 17 soybean grains were all obviously increased, and the maximum shear force of soybea n particles was 160.326 N and the maximum rotational kinetic energy was 19.758 J. The results of the experiment and simulation agree with each other. The results provide theoretical basis for the research and design of other pulverizer cutters.