密植棉秆对行起拔铺放机的设计与运动仿真

Design and motion simulation of row-controlled drawing and placing machine for cotton-straws close planting

基于棉花穴播器工作原理,采用逆向工作方法设计了一种适用于密植种植模式的棉秆对行起拔铺放机,可实现对机采棉棉秆的减阻开沟、对行整秆起拔、铺放等作业,且具有分离泥土和整理棉秆的功能;该机一次作业6行,经计算得理论生产率约为1.21~1.26 hm^2/h。运用SolidWorks Motion对拔秆装置进行了运动仿真,分析了在拔秆装置转速一定时(207.69 r/min),机组在不同前进速度下两个相邻拔齿刀端点的运动路径,得出机组的前进速度约为1 600~1 660 mm/s时,可使拔秆装置正常有序工作。该研究为该机组结构优化、物理样机的搭建、优化拔秆装置旋转速度和前进速度的匹配提供参考。

Combining with reverse working method, a new kind of row-controlled drawing and placing machine for cotton-straws close planting was designed by SolidWorks based on the working principle of cotton precision dibbler. The machine could complete a number of operations on the whole cotton-stalks with the style of row-controlled, such as ditching, drawing, placing and so on. The soil was separated and cotton-stalks were put in order during the machine operation. The machine could operate six lines of cotton-stalks at a time, and its theoretical productivity was about 1.21~1.26 hm^2/h by the calculation. Motion simulation of cotton-straws drawing device was done by using the SolidWorks Motion. The motion paths of two adjacent end points of tooth cutters were analyzed when the rotation speed of cotton-straws drawing device was 207.69 r/min and the moving forward speed of machine was different, and it was found that the cotton-straws drawing device could work normally and orderly when the moving forward speed of machine was about 1 600~1 660 mm/s. The study would provide a theoretical basis for the structure optimal design of the machine, construction of physical prototype, reasonable matching of the moving forward speed of machine and the rotation speed of cotton-straws drawing device.