旱地全膜双垄沟播直插式玉米播种装置的仿真优化

针对膜上播种需求,设计了一种新型曲柄滑块机构驱动平行四杆机构直插式播种装置,该装置结构简单,能够实现播种时成穴器"零速"播种,不易挑膜、撕膜。以成穴器相对于机架x方向的速度差v、排种管入出土后水平位移差s为优化目标,在Solidworks Motion中进行了该装置结构优化仿真。得到结果为:当以0.5 m·s~(-1)为前进速度时,曲柄Ⅱ长度69 mm、连杆长度167 mm、曲柄机构转速100 r·min~(-1)的播种装置能得到较好的直插播种性能。

Optimization of simulation of direct-insert corn planting furrow seeder for whole plastic-film mulching on double ridges in dry land

To meet the demand of seeding on film,a new type of direct-eeding device,with a parallel four-bar mechanism driven by crank slider mechanism,was designed.Due to its simple structure and high precision,the device could achieve "zero speed" sowing of hole-forming device.Aiming at the optimization of the speed difference v of the hole forming device with respect to the x direction of the frame,and the horizontal displacement difference s between buried and the pipe line,the structure of the device was optimized in Solidworks Motion.It was found that when using 0.5 m· s-1 as the forward speed,the length of the crank Ⅱ and the length of connecting rod were 69 mm and 167 mm respectively,and the speed of crank was 100 r· min-1.Thus the optimal direct seeding performance could be achieved.