固态肥深施机工作机理及核心部件优化设计  

Working mechanism of solid fertilizer deep fertilizing machine and optimization design of core components

作　　者：钱孟波[1] 李希斌[1] 王望龙 任成龙 QIAN Mengbo;LI Xibin;WANG Wanglong;REN Chenglong(School of Engineering,Zhejiang A&F University,Hangzhou,Zhejiang 311300,China)

机构地区：[1]浙江农林大学工程学院,浙江杭州311300

出　　处：《江苏大学学报（自然科学版）》2021年第4期421-427,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51875531)。

摘　　要：通过Solidworks2016设计了一款果园螺旋式固态肥深施机,并利用Simulation对挖穴钻头进行了静应力分析及模态分析.以主轴壁厚为指标进行优化,主轴壁厚最优解为4 cm,螺旋叶片作业时受到的最大应力主要集中在钻轴下端叶片焊接处,最大值为121.5 MPa;优化后钻头质量减轻了8.04 kg;模态分析结果显示,钻头的工作转速能够避开其临界转速,避免发生共振.该深施机不仅能精准控制肥料施放量,实现施肥过程的挖穴、施肥、覆土的机械化连续性运作,更能适应山地果园狭小的工作环境.An orchard spiral solid fertilizer deep fertilizing machine was designed by Solidworks 2016,and the static stress analysis and the modal analysis of spiral drill bit were carried out by Simulation.The optimization was carried out with the wall thickness of drill shaft as index.The results show that the optimal solution for the wall thickness of drill shaft is 4 cm,and the maximum stress of spiral blade is mainly concentrated at the welding position of lower blade of drill shaft with the maximum value of 121.5 MPa.The weight of drill bit is reduced by 8.04 kg after optimization.The modal analysis results illuminate that the working speed of drill bit can avoid the critical speed to avoid resonance.The deep fertilizing machine can not only control the amount of applied fertilizer accurately,but also realize the continuously mechanized operation of″digging holes,fertilizing and covering soil″in the fertilization process.The fertilizing machine can also be adopted in the narrow working environment of mountain orchards.

关 键 词：深施机 螺旋打孔 有限元分析 模态分析 优化设计 

分 类 号：S224[农业科学—农业机械化工程]