Authors

Abstract

In order to improve the pelleting effect of Agropyron seeds, the pelleting experiment was conducted under different working parameters. In this paper, the discrete element simulation software EDED was used to establish the simulation model, and the influence of the vibration frequency of coater, the tilt angle of coater, and the rotational speed of coater on the movement trajectory of the Agropyron population were analysed. The simulation results show that the rotational speed is 40r/min, the tilt angle is 35° and the vibration frequency is 20 Hz, and the amplitude is 2 mm, the optimal trajectory of Agropyron population is obtained. The orthogonal experiment of 3 factors (vibration frequency of coater, rotational speed of coater, tilt angle of coater) and 5 levels were designed. The working parameters of pelleting Agropyron seeds were optimized by investigating the 4 indexes of compressive strength, seed rate, single seed rate and pelleting qualified rate. The results show that the vibration is the main factor affecting the compressive strength and single seed rate, the rotational speed is the main factor affecting the seed rate, and the inclination angle is the main factor affecting the pelleting rate. The optimal parameters are as follows: the rotational speed is 40r/min, the tilt angle is 35° and the vibration frequency is 20Hz.

Abstract in Chinese

为了提高小粒冰草种子丸化包衣效果，对不同工作参数下的冰草种子进行丸化处理。运用离散元仿真软件EDEM建立仿真模型，分析了包衣锅振动频率、包衣锅倾角、转速对冰草种群运动轨迹的影响规律。仿真结果表明：转速为40r/min,倾斜角为35°，振动频率为20HZ,振幅为2mm时，冰草种群运动轨迹最佳。设计了3因素（包衣锅振动频率、包衣锅转速、包衣锅倾斜角）5水平的正交试验，通过考察抗压强度、有籽率、单籽率、丸化率4个指标，对冰草种子丸化包衣的工作参数进行优选，试验结果分析表明：振动幅度是影响抗压强度、单籽率的主要因素，转速是影响有籽率的主要因素，倾斜角是影响丸化率的主要因素，最优的参数水平为转速为40r/min,倾斜角为35°，振动频率为20HZ。