丸粒化玉米种子精密排种器

针对机械式精密排种器对种子尺寸要求严格、伤种率高的问题,在对种子丸粒化的基础上设计了一种丸粒化玉米种子精密排种器.通过改变排种盘的结构、参数和排种轴转速,运用丸粒化后尺寸近似服从正态分布N( 13.9,0.056 6)的玉米种子,在排种试验台上进行排种性能试验.结果显示当排种轴转速为14 r/min、型孔直径为15 mm、排种盘的倾角为23°时,排种单粒指数可达98％,满足精密播种的精度和速度要求.

Precision Seed-metering Device for Pelleted Corn Seeds

In order to solve the problem of mechanical precision metering, such as being strict with the size of seeds and high damage to seeds, a precision metering was designed based on the pelleted corn seeds. A single (precision) seeder experimental method, with the pelleted corn seeds whose size approximatively follow the normal distribution N(13.9,0.0566), comparative experiments of the metering performance were conducted by changing the structure parameters and rational speed of the moving plate. The results indicated that the single seed index was more than 98% when the rational speed of the moving plate was 14 r/min, the diameter of the cell was 15 mm and the oblique angle was 23°, so it proved that it had high sowing precision and speed.