5TYS280玉米脱粒清选试验台的设计研究

我国夏播玉米主要集中在黄淮海地区,其生长期短、收获时籽粒含水率高,直接脱粒收获易造成籽粒破碎,脱净率与籽粒破碎率和含杂率之间的矛盾,作业质量较难保证。目前,针对高含水率玉米脱粒清选装置的系统理论与试验研究均较少,因此设计开发了一种玉米脱粒清选试验台。其主要由机架、脱粒分离装置、清选装置、输送装置、电机控制及转速数据采集系统等部件组成。以籽粒破碎率和含杂率为评价指标,通过调整滚筒转速、滚筒倾角、凹板间隙、筛网倾角、曲轴转速及风机转速等关键因素水平,进行单因素多水平试验及多因素多水平正交试验,确定高含水率玉米脱粒清选装置的最佳参数组合,为玉米籽粒收获机脱粒清选部件设计、改进及参数选择提供依据。

Design and Research on 5 TYS280 Corn Threshing and Cleaning Test Bench

In China , summer corn is mainly concentrated in the Huang-Huai-Hai region .Due to short growth period , the grain moisture content is high during harvest .Direct threshing is easy to cause grain crushing .There are problems be-tween net rate , crushing rate and impurity rate .Operation quality is difficult to guarantee .Now there are few theory re-search and test bench in corn threshing and cleaning .So this article designs one corn threshing and cleaning test bench , mainly including frame , threshing and separating device , cleaning device , transmission device and motor control and ro-tating speed monitoring system .Using crushing rate and impurity rate as evaluation index , this test bench can carry out single factor experiment and multiple factors levels orthogonal test through adjusting the parameters of cylinder speed , cyl-inder angle , concave clearance , vibrating screen angle , crankshaft speed and fan speed .It can determine the best pa-rameters for high moisture corn threshing and cleaning device and provide basis for design , improvement and parameter selection .