为实现玉米精量播种,设计了一种适用于穴播轮的新型勺匙式取种器.在确定了取种器关键参数后,对其工作原理和过程作了分析,得出了影响勺匙式取种器性能主要因素和临界条件.以导种管弯角、容种高度和机组行走速度为因素,以单粒率、空穴率为指标进行了正交试验,通过试验数据分析可知,使勺匙式取种器性能最佳的参数组合是:导种管弯角90°、容种高度为穴播轮半径的2/3、速度0.86 m/s.试验结果表明,勺匙式取种器满足玉米精量播种的要求.%In order to realize the maize precision sowing, a new spoon shaped seedmeter was specially designed for punch planter. After the key data of the seedmeter was decided, and the analysis on its working principle and process was made in this paper, which led to the key factors and critical conditions that would affect the functions of the spoon shaped seedmeter. The orthogonal experiment was made which took the seed tube bending angle, seed height and velocity as factors and took single seed rate and cavity rate as index. The experimental data analysis showed that optimal parameters of spoon shaped seedmeter were 90 degrees seed tube bending angle, two-thirds radius of punch planter seed height, 0.86 meters per second velocity. The tests showed that the spoon shaped seedmeter was satisfied with the maize precision sowing.
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