项目针对机械式精量排种器高速作业条件下种子堆积起拱和种子没有足够的时间充填型孔造成空穴而导致播种精度差的问题，从防止起拱和有效保障种子充种时间的角度出发，提出有序排队、零速充种新方法，研究基于V槽结构的并排双腔取种器高速作业条件下有序排队、零速充种机理，构建种子的运动学和动力学模型，明确影响种子有序排队、零速充种性能的各因素及其相互关系，仿真找出主要影响因素及其适宜参数范围，试验确定并排双腔取种器的结构方案和参数；搭建基于并排双腔取种器的排种器实验平台，试验确定影响其排种性能的主次因素及其最优水平组合，构建各性能指标影响因素的回归方程，并对影响各性能指标的结构与工作参数进行多目标设计优化，试验验证优化结果的可靠性与准确性，得到具有普遍意义且能广泛用于生产实践的并排双腔排种器产品，从源头上解决其高速作业情况下连续可靠充种的科学问题，并为机械式精量排种器的研究提供一定的参考。

Years of practical application discovery that the problem of poor precision seeding caused by the cavity is appeared obviously in seeding process of mechanical precision seeding device.Under high speed operating conditions, the cavity is mainly caused by seeds bulk bagging as well as seeds do not having enough time to fill the hole because of the high linear velocity at the filling port.For the purpose of solving the problem of cavity, from the viewpoint of prevention of seed bagging and the effective guarantee of filling time for seeding,in this reseach new method of seeding orderly-queuing and zero speed-filling is proposed. This project makes intensive study on orderly queuing and zero speed seed-filling mechanism based on dual chamber in side by side seeding device with the V-groove structure. Kinematics and dynamic models of seed orderly queuing as well as zero-speed seed-filling were built to obtain the various factors and their relationship which effect the performance of orderly queuing and zero-speed seed-filling. To identify the main factors and appropriate parameters by simulating. Then, to improve the dual-chamber structure,as well as to determine the overall structure and parameters of seeding device based on orderly queuing and zero speed filling by testing.Thus to obtain primary and secondary factors which influenced the seeding performance and its optimal level combination by testing, as well as to establish the regression equation of each factors affecting the seeding performance. Also,multi-objective optimization design for the structure and operating parameters was carried on and the reliability and accuracy of optimization results were verified by experiment. All in all ,the reseach intent to producing a seeding device which has universal applicability and can be widely used in practice ,with dual-chamber structure in side by side,and solving the scientific problem of continuous and reliable seed-filling from the beginning in the seeding process under the high speed operating conditions when it works . The reseach output will provide technical reference for the study of the mechanical precision seeding device.