油菜精量联合直播机气力排种系统性能和参数建模

Modeling for performance and parameters of pneumatic seed-metering system of precision planter for rapeseed

摘要: 为了了解油菜精量联合直播机气力排种系统工作参数及排种性能对油菜直播机作业性能的直接影响，该文应用JPS-12排种器性能检测试验台及自行研制的气力式油菜精量排种检测系统，开展了气力排种系统排种器单体负压流量与压强、系统各负压支路输气管压强及系统总负压输气管流量的试验，构建了基于系统总负压输气管流量与各支路输气管流量的神经网络模型，得出了系统总负压流量与风机转速、正压泄气孔大小的关系式及系统各支路输气管压强与流量的转换关系模型；同时以排种系统各行排量一致性变异系数＜5%、各排种器单转排量＞36粒等为约束方程，建立了以风机转速、排种轴转速及正压泄气孔大小为变量的整数规划模型，研究表明，所建立的系统工作参数及排种性能模型，对排种系统的性能优化与结构改进具有重要的理论价值和实际指导意义。

Abstract: 2BFQ-6 precision planter for rapeseed can be used for sowing, fertilization, rotary tillage, stubbing and trenching. Pneumatic seed-metering system is the key component of this planter, and its working parameters and seeding performances directly affect the planter's operating performances that include the consistency of seeding quantity per row and the stability of the total seeding quantity of the planter.