摘要
为了建立小麦颗粒在清选振动筛和播种器中的碰撞模型,该文基于运动学方程原理构建了小麦恢复系数测试装置,对小麦的弹性特性进行了测定。试验选择江浙皖地区推广使用的扬麦17号小麦品种,采用混合正交试验设计方法,研究了碰撞材料、板材厚度、下落高度和小麦含水率对小麦恢复系数的影响。结果表明影响小麦恢复系数的因素主次顺序为:碰撞材料、下落高度、材料厚度和小麦含水率。小麦恢复系数随着下落高度的增大而减小,随着材料厚度的增加而增大,小麦含水率对其恢复系数的影响很小。该文的研究结果可为联合收割机清选振动筛和精密播种机的数值模拟和产品设计提供依据。
To establish collision models of wheat seeds that on cleaning screen or seeds sower, a wheat restitution coefficient test device was build based on principle of kinematics equation in the paper, which was used to test the elastic properties of wheat seeds. Yangrnai No. 17 which is widely cultivated in Jiangsu, Zhejiang, Anhui province was chosen in the test and the mixed orthogonal design was used to investigate the factors that influencing the restitution coefficient of wheat such as collision material, sheet thickness, drop height and moisture content of wheat. Results indicate that the primary and secondary order of factors affecting restitution coefficient of wheat are impact material, drop height, sheet thickness and moisture content of wheat. The restitution coefficient of wheat decreases with the falling height increasing, but increases with the sheet thickness increasing. Wheat moisture content has little influence on the restitution coefficient The results can provide a reference for the simulation and product design of cleaning screen in combined harvesters and precision seeds sower machine.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2012年第11期274-278,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家农业科技成果转化资金资助项目(2011GB2C00008)
国家高技术研究发展计划("863"计划)资助项目(2012AA10A502)
江苏省高校自然科学研究资助项目(11KJA460002)
江苏高校优势学科建设工程资助项目(苏财教(2011)8号)
江苏省农业装备与智能化高技术研究重点实验室资助项目(BM2009703)
关键词
模型
运动学
试验
小麦
碰撞
弹性特性
恢复系数
响应面法
models, kinematics, experiments, wheat, collision, elastic properties, restitution coefficient
