摘要
为提高油菜播种质量,探索最佳螺旋窝眼轮式排种器工作参数组合,运用EDEM技术对不同排种轮转速、窝眼轮型孔圆角直径、窝眼轮型孔排列螺旋升角进行仿真分析,确定了排种轮转速、窝眼轮型孔圆角直径及窝眼轮型孔排列螺旋升角与排种性能的关系。仿真结果表明:排种器转速30 r·min^(-1)、窝眼轮型孔圆角直径3mm、螺旋升角59.31°时,合格指数在93.7%以上,漏播指数为1.3%,重播指数为5%;随转速的增加,合格指数呈线性下降趋势,漏播指数、重播指数、变异系数均一定程度有所上升。经方差分析,得综合指数影响显著性顺序依次为排种轮转速、窝眼轮型孔圆角直径大小及窝眼轮型孔排列螺旋升角。仿真与田间试验拟合度高,表明采用离散元法分析油菜播种作业是可行的。
For improving the seeding quality of cole,exploring the best parameter for Spiral Wobble Wheel Seed Metering Device,by using EDEM analyze the speed,diameter,position of different type of seeding device;defined the relationship between speed,diameter of the whirling hole,rising angle and the seeding quality. Simulation results showed： when the speed was 30 r·min^-1,whirling hole diameter was 3 mm,and the rising angle was 59. 31°,the qualification rate was over 93. 7%,missing rate by 1. 3%,reseeding rate was 5%; By increasing the speed,will decrease the qualification rate,and increase the missing rate,reseeding rate as well as variation figures. According to the variance analysis,the order of the significance among those factors was first speed,second whirling hole diameter and then the rising angle. Because of the highly matching of the simulation results and the field experiments proved that it＇s possible to use the method of the discrete element for analyzing the Cole seeding machine.
作者
冯岩
孙步功
张克平
石林榕
赵武云
FENG Yan;SUN Bu-gong;ZHANG Ke-ping;SHI Lin-rong;ZHAO Wu-yun(College of Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China;Cultivation Base of National Key Laboratory for Arid Habitats, Gansu Agricultural University, Lanzhou, Gansu 730070, China)
出处
《干旱地区农业研究》
CSCD
北大核心
2018年第2期288-294,共7页
Agricultural Research in the Arid Areas
基金
国家自然科学基金项目(51665001)
甘肃省自然科学基金(1506RJZA021)
