铲式玉米精密播种机振动特性模型建立与试验

Mathematic Vibration Model of Spade Punch Planter of Maize

为了研究铲式玉米精密播种机播种性能与农田不平度激励产生振动之间的关系,推导了稳态响应与理论粒距关系数学模型。由建立的数学模型得出铲式玉米精密播种机的播种性能主要由播种机的结构特征、播种机工作速度、倾斜圆盘勺式玉米精密排种器与耕作土壤表面间的距离、土壤不平度和土壤粘性决定。理论粒距与实际粒距的对比结果表明,两者分布趋势基本相同,建立的稳态响应与理论粒距关系数学模型可用于对工作状态下播种机的播种性能进行预测和分析。

In order to investigate the relation between the seeding performance of precision spade punch planter of maize and the vibration caused by the simple harmonic excitation of field roughness, a mathematic vibration model between steady state responses of precision spade punch planter of maize and real seed displacement was established. The mathematic model gave the conclusion that the uniformity of sowing seed of planter was mainly decided by next factors, such as structure properties of planter, work velocity of planter, distance between the seed metering device of planter and the surface of till soil, surface conditions, and the adhere of till soil. The comparasion results between theoretical seed distance and experimental seed distance indicated the distributed trend between both distances above. It was proved that the mathematic model could be used to predict and analyze the uniformity of sowing seed.