无气吸式割前摘脱装置的试验研究

针对非气吸式割前摘脱装置在收获作物时,出风口筛面发生堵塞使装置内流场变差,导致装置的落粒损失率过大问题,研制了一种用横流风机替代原摘脱装置中网格式出风口的新型割前摘脱装置,同时给出了装置的总体配置方案。试验发现,可以通过控制横流风机的转速,使装置内气流在有控制的情况下排出,改善了装置内流场状态,提高了装置喂入口处的负压,这对减少摘脱装置的落粒损失、减轻机器的复脱和清选负荷,有着十分重要的意义。

Experimental Research on the Stripping Unit Without Air Suction

A stripping uint with the cross-flow fan was developed,aimed to reduce the grain losses at the rear of the stripping drum reduce the blocking to the air outlet sifter and diffuse dust.. This dissertation gives overall scheme of the rig and had mad experimental study .The air-flow field in the stripping unit can be adjusted easy by changing the rotation speed of fan which is benefit to reduce the grain losses. it was found during experiment that the cross-flow fan can diffuse some of MOG(material other of grain )and diffuse it in a certain direction which is useful to satisfy the working condition for driver and lighten working load of the threshing unit of the combine harvester