螺旋循环式石灰撒施机撒施过程分析与模拟

Analysis and Simulation of Spreading Process of Spiral Circulating Lime Spreader

针对南方红黄壤地区的土壤酸化及重金属污染等问题,介绍了一款螺旋循环式石灰撒施机。机器能有效解决石灰撒施存在的不均匀及扬尘污染等问题,适用于水田、旱田等多种土壤环境。首先,在介绍机器的结构组成和工作原理的基础上,对石灰撒施机撒施性能进行了分析;其次,基于BBD试验方法,以出灰孔开口宽度、撒施辊轴转速、机器前进速度作为影响因素,以石灰撒施的横向分布变异系数和撒施量作为影响效应,设计了三因素三水平的响应面试验,并借助离散元仿真软件EDEM对石灰撒施过程进行仿真模拟;最后,建立了影响因素和影响效应的数学回归模型,得到了各影响因素对分布变异系数和撒施量的影响次序,以期为石灰撒施机的进一步优化提供参考。

Aiming at the problems of soil acidification and heavy metal pollution in southern red and yellow soil regions,this article introduces a spiral circulating lime spreader.The machine can effectively solve the problems of uneven lime spreading and dust pollution,and is suitable for various soil environments such as paddy fields and dry fields.First,on the basis of introducing the structure and working principle of the machine,the spreading performance of the lime spreader is analyzed.Secondly,based on the BBD experimental method,the opening width of the ash outlet,the rotating speed of the spreading roller,and the machine's forward speed are used as the influencing factors,and the lateral distribution coefficient of variation of lime spreading and the spreading amount are used as the influencing effects.The three-level response surface experiment is used to simulate the lime spreading process with the help of discrete element simulation software EDEM.Finally,a mathematical regression model of influencing factors and effects is established,and the degree of influence of each influencing factor on the distribution coefficient of variation and the amount of spreading is obtained,in order to provide a reference for the further optimization of the lime spreader.