【摘要】 以气吸式垂直圆盘排种器为研究对象,利用高速摄像技术,研究了精播水稻芽种排种器的充填过程,采用ANSYS软件对水稻芽种在充种过程中的速度场和压力场进行了模拟,并进行了排种性能试验研究。研究结果表明:真空度在1.80~4.37 kPa范围内排种性能最好;排种盘线速度在极限转速范围内,排种盘充填性能很好。排种盘线速度大于0.55 m/s时,排种盘充填性能开始明显下降。更多还原

【Abstract】 Using the air vertical-rotor seed-metering device as the investigation object, the filling process of the precision seed-metering device in rice bud-sowing via High Speed Video Camera System (HSVCS) technique was studied, and the speed and pressure in the seed-filling process of rice bud-sowing through ANSYS software were simulated. The seeding performance was also studied. The results show that the best performance of seed-metering device is at vacuum-pressure just between 1.80～(4.73 kPa). When linear speed of seed plate exceeds 0.55 m/s,the filling performance begins to decline evidently. The motional rule of seed-filling process and its influencing factors are proved up on the basis of theoretical analysis and experiment. This study establishes a foundation for the systematic design theory and optimized design of air-sucking seed-metering device of rice bud-sowing.更多还原