基于ADAMS的二级弧形摆动式碎土机构碎土性能分析

针对现有浙贝母收获机具不匹配、贝土分离效果差等问题,提出一种适合浙贝母机械化收获的二级弧形摆动式碎土机构设想,并对其碎土性能进行理论分析,得出该机构对浙贝母表层土壤有更好的破碎效果和对浙贝母更小的摩擦力。利用ADAMS软件,对影响浙贝母所受碰撞切向力大小的一些因素进行仿真分析,排除无影响因素,对剩余因素进行二次正交旋转组合试验,对试验结果进行方差分析,明确影响碎土性能因素的主次关系:辊面高度差、浙贝母下滑位置、转轴偏差角。根据分析计算结果得知上下两辊面与地面间夹角为12°时,所有浙贝母均可顺利下滑,且其在辊面上的运动时间最长,分土效果最好;.在保证浙贝母不破裂损伤的前提下,该机构可破碎最大厚度为19.4mm的土壤。为浙贝母收获机械及碎土机构的研究设计提供理论参考和数据支持。

Analysis of soil crushing performance of two-stage arc swing soil crushing mechanism based on ADAMS

Aiming at the problems of mismatch of existing harvester and poor separation effect of Fritillaria thunbergii,a two-stage arc oscillating soil crushing mechanism suitable for mechanized harvesting of Fritillaria thunbergii was proposed,and its soil crushing performance was theoretically analyzed.It is concluded that the two-stage swing mechanical of separating the soil has better crushing effect on the surface soil of Fritillaria thunbergii and less friction on Fritillaria thunbergii.Using ADAMS software,some factors affecting the impact tangential force of Fritillaria thunbergii were simulated and analyzed,excluding no influencing factors,the quadratic orthogonal rotation combination testing for other factors,and analysis of variance was performed on the test results.The primary and secondary relations of the factors affecting the performance of broken soil are clarified:height difference of roll surface,sliding position of Fritillaria thunbergii,deviation angle of rotating shaft.According to the results of analysis and calculation,it is known that:When the angle between upper and lower roll surfaces and ground is 12degrees,all Fritillaria thunbergii can slide smoothly,and its movement time on the roll surface is the longest and the effect of soil separation is the best good;On the premise that Fritillaria thunbergii does not break and damage,the mechanism can break the soil with a maximum thickness of 19.4mm.The experimental data and results obtained can provide reference for the design optimization of Fritillaria thunbergii soil separator.