摘要
为获得小区育种小麦脱粒装置最佳脱输性能参数,减少籽粒在装置内的滞留,提高育种试验数据的可靠性,在不考虑脱粒破碎的情况下,利用离散元软件EDEM对脱粒装置内小麦籽粒和短茎秆混合物料的运动过程进行模拟,为优化脱粒装置工作参数,进一步降低籽粒在脱粒装置内的残留率,分析研究了脱粒物料中单个抛出籽粒、抛出茎秆及滞留籽粒的速度、位移随时间的变化规律,并对脱粒装置内的物料流进行了仿真试验。仿真结果表明,当滚筒转速为1 600 r·min^(-1),喂入量为0.3 kg·s^(-1),脱粒间隙为8 mm,装置内籽粒残留率最小,并按照该最优组合作业参数对脱粒装置进行试验验证,结果表明,仿真试验和室内试验结果基本一致。因此,利用EDEM对脱粒装置的工作参数进行优化是可行的,为脱粒装置的研究和改进设计提供参考。
In order to obtain the best threshing performance parameters of threshing device on plot-bred wheat,to reduce the grain retention in the device and to improve the reliability of breeding test data,the movement process of wheat grain and short stem mixed material was carried out using EDEM software by ignoring the broken threshing. Also,to optimize working parameters of the threshing device,and to further reduce the residual rate of grain in the threshing device closely,chronical variation regulation of velocity and displacement of single thrown grain,thrown stem and stranded grain were analysed. Meanwhile,the simulation test of material flow in the threshing device was carried out. The simulation results showed that when the drum speed was 1 600 r·min（-1）,the feeding quantity was 0. 3 kg·s（-1）,and the threshing clearance was 8 mm,and the residual rate reached the minimum. In addition,verification by employing the optimal combination of the operational parameters for the threshing device indicated that the the simulation test and indoor test results were basically consistent. Therefore,the working parameters optimization for the threshing device using EDEM was feasible. It also provided a new method for the research and improved design of threshing device.
出处
《干旱地区农业研究》
CSCD
北大核心
2016年第4期292-298,共7页
Agricultural Research in the Arid Areas
基金
国家自然科学基金资助项目(51365003)
甘肃省农业科技成果转化资金计划资助项目(1305NCNA142)
