穴盘水稻秧苗通过分秧滑道的运动仿真与分析

Simulation and analysis of movement of rice seedlings passing through separating chutes

为了研究所设计的分秧滑道的性能,利用Pro/E和ADAMS软件对穴盘水稻秧苗通过分秧滑道运动进行了仿真。建立了2种秧苗营养土钵模型,球体模型和实际尺寸营养土钵模型。结果发现秧苗在通过分秧滑道圆弧段时其速度、加速度和接触力会发生突变;秧苗通过7条滑道需要的时间最长为0.633s,最短为0.463s;当滑道相对竖直平面倾斜2°布置时,秧苗通过滑道的通过性与滑道竖直布置时的差异不大。通过仿真可得到7穴秧苗不同时间点在7条滑道中的运动轨迹,以及在滑道运动的状态下,秧苗通过2组分秧滑道后在田间的定植情况。研究结果为今后分秧机构的进一步优化设计和试验研究提供了参考依据。

In order to understand the performance of designed separating chutes,the movement of rice seedlings passing through separating chutes was simulated based on Pro/E and ADMAS software.Two nutrient soil bowl models of rice seedlings,a sphere model and a real size model were developed.The results show that the velocity,acceleration and contacting force have sudden changes when rice seedlings pass through the arc sections of the chutes.The longest time is 0.633 s（chute 1） and the shortest time is 0.463 s（chute 6） when rice seedlings pass through a group of seven chutes.It has no much difference in the performance of rice seedlings passing through chutes when the posture of chutes is tilt of 2° and in vertical.The movement trajectory of seven rice seedlings in seven chutes at different time points was obtained by the virtual simulation of a computer.Furthermore,the distribution of rice seedlings after passing through two groups of chutes was also simulated when the machine was moving forward with the velocity of 0.3 m/s.The research can provide valuable reference data for the optimal design of the device and the experimental work in the future.