The transverse distribution of the threshed material in a typical tangential-longitudinal flow combine harvester is uneven and this is likely to cause local accumulation of materials on the cleaning screen. Cleaning performance and efficiency reducing problems are easily caused. In this study, discrete element simulation was applied. The distribution position of the guide strips on the threshed outputs distribution was analysed. The threshing outputs under threshing cylinder were divided into seven sections, with the total making up the threshing ration. Using the standard deviation of threshing ratio as an evaluation criterion, the optimal structural parameters of the distribution devices were obtained. In order to verify parameter accuracy, field tests were carried out to monitor the threshed outputs distribution along the transverse direction on the cleaning screen. The cleaning loss rate was analysed statistically. It was concluded that the cleaning performance of tangential-longitudinal-flow combine harvester was increased by the automatic distributing system; including threshed outputs, lateral distribution evenness along cleaning shoe was improved and local accumulation was reduced. The adaptive system decreased the criterion used for evaluation by 42%. Under a 1 m s−1 working condition, cleaning loss decreased by 71.67%, and under a 1.5 m s−1 working condition, the cleaning loss decreased by 50%.

中文翻译：

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切向纵流式水稻联合收割机导条对脱粒量分布及清扫损失的影响

典型的切纵流联合收割机脱粒后的物料横向分布不均，容易造成物料在清扫筛网上局部堆积。容易引起清洁性能和效率降低的问题。在这项研究中，离散元模拟被应用。分析了导带在脱粒产量分布上的分布位置。脱粒滚筒下的脱粒产量分为七部分，总产量构成脱粒日粮。以脱粒率标准差为评价标准，得到分配装置的最佳结构参数。为了验证参数的准确性，进行了现场测试以监测清洁筛上沿横向的脱粒输出分布。对清洗损失率进行统计分析。结论：自动分配系统提高了切纵流联合收割机的清扫性能；包括脱粒产量，沿清洁鞋的横向分布均匀度得到改善，并减少了局部堆积。自适应系统将用于评估的标准减少了 42%。在1 m s-1工况下，清洗损失降低了71.67%，在1.5 m s-1工况下，清洗损失降低了50%。结论：自动分配系统提高了切纵流联合收割机的清扫性能；包括脱粒产量，沿清洁鞋的横向分布均匀度得到改善，并减少了局部堆积。自适应系统将用于评估的标准减少了 42%。在1 m s-1工况下，清洗损失降低了71.67%，在1.5 m s-1工况下，清洗损失降低了50%。结论：自动分配系统提高了切纵流联合收割机的清扫性能；包括脱粒产量，沿清洁鞋的横向分布均匀度得到改善，并减少了局部堆积。自适应系统将用于评估的标准减少了 42%。在1 m s-1工况下，清洗损失降低了71.67%，在1.5 m s-1工况下，清洗损失降低了50%。