大豆播种机偏置双圆盘气吸式排种器

设计了一种大豆播种机偏置双圆盘气吸式排种器。通过分析偏置双圆盘气吸式排种器取种、排种作业原理,对其关键部件进行了设计、优化。以排种器播种吸盘转速、气流运动速度为试验因素,漏播率为试验指标分别进行单因素试验和二次通用旋转组合试验,运用Design-Expert软件得出回归曲面并建立数学模型,得出最佳因素组合为气流速度220 m/s、排种器播种吸盘转速100 r/min,此时漏播率为2.72%。

Suction Type Offset Double Disc Seed Metering Device of Soybean Seeder

A double offset disc air-suction seed metering device for soybean was designed. The key parts of seed metering device was designed and optimized based on the working principles of seed taking and seed metering. The single factor experiments and the quadratic general rotary unitized design were carried out with the rotational speed and air velocity as experimental factors and seed missing rate as experimental index. The regression surface was obtained and its mathematical model was built by using the Design-Expert software. The results showed that the air velocity of 220 m/s and rotational speed of 100 r/min were the best combination factors, which leaded to the seed missing rate of 2.72%.