人工收薹原理下蒜薹收获机的设计

Design of Garlic Moss Harvester based on the Principle of Manual Harvesting

首先,以天水地区种植品种白蒜、红蒜为研究对象,基于人工抽薹原理,实施了夹薹压缩实验、抽薹拉伸试验。试验表明:白蒜蒜薹茎秆粗壮,其抗压应力较红蒜蒜薹大11%左右,抽拔力较红蒜蒜薹大9.5%左右;两个品种力学性能的不同归结于微观结构不同。其次,建立了蒜薹收获机虚拟样机模型,并对抽薹过程进行了运动学分析,得出断薹率最小时机器前进速度与滚筒速度应满足的关系。在此基础上,设计了机械手的安装位置。最后,对夹薹过程进行仿真分析,得出蒜薹夹断时两夹薹轮的间隙为33.3 mm。研究结果为蒜薹收获机的结构设计提供理论依据。

In this article,taking the planting varieties of white garlic and red garlic in Tianshui area as the research objects,the compression experiments and tensile experiments are carried out based on the principle of artificial bolting.The experiments show that the stem of white garlic mosses are thick and robust,with a compressive stress of about 11% higher than that of red garlic mosses,and the tensile force of about 9.5% higher than that of red garlic mosses;the difference in the mechanical properties of the two varieties is attributed to the different microstructures.Secondly,a virtual simulation model of the garlic moss harvester is established,and kinematic analysis is conducted on the bolting process;then the relationship between the machine's forward speed and the drum speed should be satisfied when the bolt breakage rate is minimized is obtained.On this basis,the installation position of the robotic arm is designed.Finally,the simulation analysis on the clamping process of garlic mosses is conducted,and it is found that the gap between the two clamping wheels is 33.3mm when garlic mosses are clamped and broken.The research results provide a theoretical basis for the design of garlic moss harvesters.