农业机械学报2025，Vol.56Issue(7)：94-104,11.DOI:10.6041/j.issn.1000-1298.2025.07.008
基于DEM-MBD的变螺距式马铃薯分级装置设计与试验
Design and Experiment of Variable Pitch Potato Grading Devices Based on DEM-MBD Coupling
摘要
Abstract
In order to solve the problems of potato grading device with large structure,complex transmission and susceptibility to damage potatoes,a variable pitch potato grading device was designed,and its working principle was expounded.The key structural parameters of the potato were determined by dynamic and kinematic analysis of the potato in the grading drum.The dynamic model of the grading device was constructed by using RecurDyn software.The potato model was constructed in EDEM based on the physical characteristics of potato.The EDEM-RecurDyn coupling simulation was used to simulate the movement,constraint and contact between multiple components in the actual working process of the grading device.The amount of potato,the rotation speed of the grading drum and the length of the grading section were selected as the influencing factors,and the potato grading accuracy and grading efficiency were used as the evaluation indexes to verify the performance.Based on the above factors,the single factor and quadratic orthogonal rotation regression combination simulation test was carried out to determine the optimal structure and motion parameters of the grading device.The simulation results showed that the amount of potato was 3.68 kg/s,the speed of the grading roller was 34.50 r/min,and the length of the grading section was 1 600 mm,the optimal values of the classification accuracy and classification efficiency obtained were 91.6％and 3.0 kg/s,respectively.The prototype test results showed that the average classification accuracy of the grading device was greater than 89％under the optimal solution parameters,the average classification efficiency was greater than 3.18 kg/s,and the potato injury rate was less than 1％.The relative error between the simulation test and the prototype test was 2.10％,indicating that the simulation test had high accuracy and the grading device designed had good working performance,which can meet the requirements of potato grading in small and medium-sized farms.关键词
马铃薯/分级装置/变螺距式/耦合仿真/EDEM-RecurDynKey words
potato/grading device/variable pitch type/coupled simulation/EDEM-RecurDyn分类
农业科技引用本文复制引用
李卫,赵文杰,朱恒旭,翟亮,贺欣..基于DEM-MBD的变螺距式马铃薯分级装置设计与试验[J].农业机械学报,2025,56(7):94-104,11.基金项目
宁夏回族自治区重点研发计划项目(2019BFF02003)和教育部人文社科项目(22YJA630042) （2019BFF02003）
