Authors

Abstract

In order to study the distribution of buckwheat threshing outputs, on the self-designed internal and external rotary roller buckwheat threshing device test bench, the feeding amount was 0.5 kg/s, the internal roller speed was 380 r/min, and the external roller speed was +50 r/min (same direction as the internal roller), 0 r/min and -50 r/min (reverse direction compared to the internal roller) for threshing test. By analysing the overall condition of the threshing outputs, the content of each component in the threshing outputs, and the axial distribution of the threshing roller, it was found that the receiving box below the rasp bar roller mainly contained grains and chaff, leaves and petals, and the receiving box below the spike tooth roller mainly contained short stalks. Under the three conditions, the proportion of chaff in the threshing outputs was 40-45%, the proportion of leaves and petals was 23-29%, the proportion of grains was 13-19%, the proportion of short stalks was 14-16%. Grains, chaff, leaves and petals were mainly concentrated at the front, and short stalks were mainly distributed at the rear of the threshing roller, providing a theoretical basis for the design of the cleaning system.

Abstract in Chinese

为研究荞麦脱出物分布情况，在自行设计的内外滚筒旋转式荞麦脱粒装置试验台上，选取喂入量为0.5 kg/s，内滚筒转速为380 r/min，外滚筒转速分别为+50 r/min（与内滚筒同向）、0 r/min和-50 r/min（与内滚筒反向）进行脱粒试验。通过对脱出物整体情况和脱出混合物中各成分含量以及沿脱粒滚筒轴向分布进行分析，纹杆滚筒下方接料盒中主要以籽粒和细小的糠、叶子和花瓣居多，钉齿滚筒下方接料盒中以短茎秆居多，三种条件下脱出物中糠所占比例最大为40%-45%，叶子和花瓣所占比例次之为23%-29%，籽粒所占比例为13%-19%，短茎秆所占比例为14%-16%，籽粒、糠、叶子和花瓣主要集中在前端位置，短茎秆主要分布在脱粒滚筒后端，因此脱粒装置前端清选负荷较大，而外滚筒不转情况下整体分布优于另外两种情况，外滚筒与内滚筒转向相反时脱出混合物中杂余质量略低于另外两种情况，为后续清选系统的设计提供理论依据。