工作参数对超级稻育秧播种部件吸种性能的影响

Effects of working parameters on seed suction performance of seeder device for super hybrid rice seeds

为进一步提高超级稻精密育秧生产率及播种精度,该文以气吸振动组合式超级稻精密育秧播种部件为试验对象,研究了种层厚度、双孔孔距和振动频率等工作参数对其吸种性能的影响规律。试验利用高速摄像技术与振动分析仪,采用三因素五水平试验设计,得出了吸种性能与种层厚度等试验因素之间的回归模型。试验表明:滚筒真空度3.1kPa、滚筒转速14r/min、振动频率90～104Hz的条件下,种层厚度在吸种性能的回归模型中贡献率最大。最佳因素组合为种层厚度7mm、双孔孔距3mm和振动频率97Hz,吸种合格率为93.12%。研究为超级稻育秧精密播种器的设计及参数优化提供科学的依据。

To further enhance the precision seedling productivity of super hybrid rice and seeding accuracy, the effects of working parameters （such as seeds thickness, double-sucker interval and vibration frequency） on seed suction performance were studied, taken a seeder device of air-suction cylinder seeder for super hybrid rice as test object. The regression model between seed suction performance and working parameters was obtained with three factors and five levels experiments by using computer vision technology and vibration analyzer. The results showed that seed-layer thickness was the most important performance index among the experimental factors under the conditions of vacuum pressure 3.1 kPa, rotate speed 14 r/min and vibration frequency among 90 and 104 Hz. The prime value of seed suction performance was 93.12% when the seed-layer thickness 7 mm, distance of double suckers 3 mm and frequency of vibration 97 Hz. The study provides a scientific basis for design and parameters optimization of air-suction cylinder seeder for super hybrid rice.