稻麦两用螺旋舀种式排种器排种性能试验

设计了一种稻麦两用螺旋舀种式排种器,确定了该排种器关键部件的结构和参数;运用Design-Expert软件进行数据分析,得到最优参数组合,采用响应面试验方案,进行台架验证试验。结果显示:播种水稻时,在转速为45 r/min、倾斜角度为3°、出种孔长度为9 mm情况下的合格率为78.20%,重播率为3.71%,空穴率为1%,穴距合格率为97.93%,穴距变异系数为16.17%;播种小麦时,在转速为60 r/min、倾斜角度为1°、出种孔长度为9 mm,此组合下的合格率为93.37%,重播率为3.44%,空穴率为3.19%,穴距合格率为93.60%,穴距变异系数为25.50%。

Seeding performance of seed metering device with spiral tube scooping for rice and wheat

A seed metering device with spiral tube scooping for rice and wheat was designed to improve the utilization rate of planting equipment in the middle and lower reaches of the Yangtze River and realize the dual-purpose sowing of rice and wheat. The seed metering device uses a spiral seed-scoop tube assembly to take a certain amount of seeds. The structural parameters of the key components of the seed metering device are determined. The Design-Expert software was used to analyze data and obtain the optimal parameter combination. The response surface test plan was adopted to carry out the bench verification test. The theoretical results showed that the qualified rate,the reseeding rate,the no seeding rate,the qualified rate of hole distance and the variation coefficient of hole distance was 81.3%,2.8%,2.5%,94.8% and 17.4% when the rice was sown on the 45 r/min rotational speed,3° inclination angle and 9 mm the length of seeding out hole. The qualified rate,the reseeding rate,the no seeding rate,the qualified rate of hole distance,and the variation coefficient of hole distance was 98.2%,0.2%,1.6%,93.3% and 18.3% when sowing wheat on the 60 r/min rotational speed,1° inclination angle and 9 mm length of seeding out hole. The results of bench test showed that the seeding device can meet the agronomic requirements of rice and wheat sowing under certain conditions.,The qualified rate,the reseeding rate,the no seeding rate,the qualified rate of hole distance,and the variation coefficient of hole distance was 78.2%,3.7%,1.0%,97.9%,and 16.2% when sowing rice on 45 r/min rotational speed,3° inclination angle and 9 mm length of seeding out hole. The qualified rate,the reseeding rate,the no seeding rate,the qualified rate of hole distance and the variation coefficient of hole distance was 93.4%,3.4%,3.2%,93.6%,and 25.5% when sowing wheat on 60 r/min rotational speed,1° inclination angle and 9 mm length of seeding out hole. The test results are basically consistent with the theoretical results obtained from software analyses. It will provide a reference for the designing rice and wheat dual-use planters.