5.压眼轮式排种装置一般常用的排种装置,种子投放于沟底的位置多少是带有随机性的,因而不能满足精密播种的要求。这是由于种子下落轨道的不一致和投种的方向不定等因素造成的。随着机器前进速度的提高,这种随机性也随着急剧升高,严重地影响了种子在行内分布的均匀性。压眼轮式排种装置(见图55、56), 5. Eye-wheel-type seed metering device commonly used seed metering device, the placement of seeds in the ditch position is somewhat random, and therefore can not meet the precision sowing requirements. This is due to inconsistencies in the course of the seeds falling and uncertainties in the direction of investment. As the speed of the machine increases, the randomness increases sharply, seriously affecting the uniformity of the seeds in the row. Eye-wheel-type seed metering device (see Figures 55, 56)