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半精量铺膜播种机广泛被应用于种植规模较小的农户,设计一种操作简单、排种稳定均匀、伤种率低的半精量播种机具有重要的现实意义。本文设计了一种内外滚筒组合式排种装置,采用舀勺式取种器通过内滚筒旋转完成取种、清种和排种过程,使之适合玉米膜下半精量播种的要求。在对排种装置工作过程分析的基础上,给出了种子的运动过程。参照单粒(精密)播种机试验方法,对玉米进行了正交试验。试验结果表明:该排种装置播种玉米时排种参数较优组合为取种器个数6,机器作业速度为0.8m.s-1,充种容积为12.5%,此时可保证穴粒数合格率在95%以上,空穴率不高于4%,与规定粒距偏差在15%左右。
Semi-precision membrane planter is widely used in planting small-scale farmers, the design of a simple, stable and stable seeding, low rate of semi-precision seeder has important practical significance. In this paper, a combined inner and outer roller seed metering device was designed. The scoop scoop was used to rotate the inner cylinder to complete the process of seed, seed clearing and seeding so as to fit the requirements of semi-precision sowing under maize film. Based on the analysis of working process of the seed device, the process of seed movement is given. With reference to single grain (precision) planter test method, the orthogonal experiment of corn was carried out. The results showed that the optimal combination of planting parameters was that the number of seeds was 6, the working speed of the machine was 0.8ms-1 and the filling volume was 12.5% Above 95%, the void ratio is not higher than 4%, and the deviation from the specified grain size is about 15%.