【摘要】 横置轴流脱粒的履带式全喂入稻麦联合收获机籽粒含杂率高,从尾筛落下的杂余随籽粒进入粮箱是主要原因。通过测定单位时间所产生的杂余量及其构成,设计了以螺旋板齿式复脱器为核心的复脱系统,计算了整个系统的物料轴向速度和输送量,并对应用此复脱器的联合收获机进行了田间试验测定。结果表明:螺旋板齿式复脱系统能使占喂入量9%～10%的杂余顺畅地收集、输送、再脱粒、经二次清选后进入粮箱,使含杂率从7%下降到行业标准要求的2%以下。更多还原

【Abstract】 The grain impurity rate of the combine harvester with across axial flow roller was high for the grain surplus could enter into the bin.By measuring the quantity and composition of grain surplus in unit time,the developed re-threshing system could calculate the speed and total amount of the material,and be tested in field.The statistics showed that this system could make the grain surplus amounting to 9%～10% smoothly be collected,transmitted,threshed,then sent into the bin again,which reduce the trash content from 7% to below 2%.更多还原