气吸振动盘式排种装置工作过程分析与研究

Research and Analysis of Vacuum-vibration Tray Seeding Device's Seeding Process

对气吸振动盘式精密排种装置吸、排种过程进行了研究,分析了携种过程中种子颗粒受力,建立了受力模型,推导出带动吸种盘运动的机械手动力学特性要求:随着负压值的增大,机械手临界加速度增加;长度方向吸附的种子最容易发生掉落,机械手设计时应满足长度方向不发生掉落的条件。同时,建立了种子颗粒与吸种盘的碰撞运动数学模型,得出种子颗粒不被碰离吸种盘面板的弹回临界速度与负压值的关系。结果表明:随着负压值增大,种子颗粒弹回临界速度增加;长度方向碰撞的种子最容易发生弹回掉落,当碰撞弹回速度大于临界弹回速度时,种子将脱离气流场约束并弹离吸孔。

Study the vacuum- vibration tray precision seeding device's seeding process,analysis seed particle force and build the seed particle force model,get the dynamic characteristics of suction disc movement requirements. With the increasing of pressure,the critical acceleration of manipulator increases. Seed most easily falling at the length of seed adsorption,manipulator design should satisfy the length direction falling condition that does not occur. Study on seed particles and suction plate collision movement,establishing collision motion model,get the relationship between seed particles is not touched off the bounce of critical velocity and negative pressure suction panel values. With the pressure increase,the critical velocity of seed particles increase. The length of seed is most likely to occur collision bounce off,when the impact velocity is greater than the critical speed,the seed will be out of flow field constraints and bounce off suction hole.