基于EDEM的小蚕饲喂机的性能分析与优化

Performance Analysis of Small Silkworm Feeding Machine Based on EDEM

小蚕共育饲喂过程中,饲喂机械多采用撒喂方式.针对饲喂机械桑叶撒喂均匀性不够、饲喂精度不足等问题,以一种桑叶饲喂机为研究对象,阐述了该饲喂机的基本结构与工作原理,采用SolidWorks对该饲喂机进行建模,并在离散元软件EDEM仿真环境下,以输送带速度、赶料辊转速以及输送倾角为影响因子,设计了正交试验,研究其对桑叶撒喂均匀性及饲喂误差的影响.试验结果表明,输送带速度为0.22 m/s,赶料辊转速为140 r/min,输送倾角为45°为最优工作参数组合,且输送带速度对物料堆积均匀度与饲喂误差的影响最为显著.根据仿真结果对饲喂机结构参数进行优化并进行了对比试验,结果表明,电机输出转速在110~330 r/min范围内,调整后的饲喂机饲喂物料的堆积质量方差平均值与饲喂误差平均值分别减少了73.9%与43.58%,即物料堆积均匀度与饲喂精度有较大提升,达到了较好的优化结果.

In the feeding process of small silkworm co-rearing,feeding machinery mostly adopts the way of scattering feeding.Aiming at the problems of insufficient uniformity and feeding precision of mulberry leaf feeding machine,the basic structure and working principle of a mulberry leaf feeding machine were described.SolidWorks was used to model the feeding machine,and in EDEM simulation environment,the orthogonal experiment was designed to study the influence of various factors on the uniformity of mulberry leaf spreading and feeding error.The results show that the best condition was the belt speed of 0.22 m/s,the roller speed of 140 r/min,and the conveying angle of 45°.Moreover,the belt speed has the most significant effect on the uniformity of material accumulation and feeding error.According to the simulation results,the structure parameters of the feeder are optimized and the experimental results show that the average value of the accumulated mass variance and feed error of the improved feeder are reduced by 73.9%and 43.58%respectively in the range of 110~330 r/min motor output speed.The results of optimization are quite good.