联合整地机匀土旋平刀辊设计与试验  

Design and tests of the soil moving and leveling blade roller for combined tilling machines

作　　者：刘尚坤 刘超 张秀花[1] 刘江涛[1] 弋景刚[1] 张晋国[1] 无 Liu Shangkun;Liu Chao;Zhang Xiuhua;Liu Jiangtao;Yi Jinggang;Zhang Jinguo;无(College of Mechatronical and Electrical Engineering,Hebei Agricultural University,Baoding 071001,China;Technology Innovation Center of Intelligent Agricultural Equipment,Hebei Provincial,Baoding 071001,China)

机构地区：[1]河北农业大学机电工程学院,保定071001 [2]河北省智慧农业装备技术创新中心,保定071001

出　　处：《农业工程学报》2022年第17期1-9,共9页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家重点研发计划项目(2017YFD0300907);河北省重大科技成果转化专项(20287201Z);河北省重点研发计划(22327206D);河北省省属高校基本科研业务费项目(KY202014);河北农业大学引进人才科研专项(YJ201814)。

摘　　要：为解决联合整地机破茬翻埋作业后地表平整度低、土壤分布不均匀的问题,该研究设计了分段反螺旋式匀土旋平刀辊,提出田口法结合离散元仿真的刀辊参数设计思路。首先定性分析并确定了影响刀辊轴向运土和抛土的关键因素及水平;然后以作业后地表平整度为优化目标,以沙壤土和黏壤土为噪声因子,利用田口法设计试验并进行离散元仿真,得出适应不同土壤类型的最优参数组合为:刀轴转速300r/min、螺旋升角70°、旋耕刀型号IT245、刀轴直径80mm、刀座间距62mm、旋耕刀双螺旋排布,此时地表平整度仿真值为14.2mm。以最优参数组合制造样机并进行田间验证试验,作业后地表平整度为11.6mm、土壤分布均匀度为92.6%、耕深稳定性系数为93.2%、破土率为86.4%,优于小麦种植对耕整地的要求,所设计的刀辊有效。研究结果可为联合整地机刀辊设计提供参考。Combined tillage can be utilized to implement two or more tillage operations in the field at the same time.The efficient and potential way can be widely used to reduce soil compaction,labor,and fuel cost.However,the current combined tilling machine cannot fully meet the harsh requirement of better surface flatness and soil distribution after stubble breaking and burying operation.In this study,a piecewise anti-helix blade roller was designed to improve the parameter robustness using Taguchi method and discrete element simulation.Firstly,the structural scheme of moving and leveling soil blade rollers was designed,according to the M-shaped surface produced by the ordinary blade roller in the previous generation prototype test.Specifically,the gearbox was put in the middle of the frame with a blade roller at each side.Each blade roller was designed as two sections with opposite and unequal lengths of spiral directions.As such,the middle and each side ridge ditches were filled for the moving and leveling of the two raised soil ridges that formed by the burying operation.Secondly,some key factors were qualitatively analyzed to optimize the work parameters of the piecewise anti-helix blade roller.The specific level of the factor was determined in the axial soil transportation and throwing off the blade roller.Taguchi method was used to design the test scheme,where the surface flatness was taken as the optimization objective,and the sandy loam and clay loam were the noise factors.The three-dimensional models were established using the test parameters after the discrete element simulation.The optimal combination of parameters was obtained suitable for the different soil types.Specifically,the cutter shaft speed and diameter,the screw angle,and the blade seat spacing were 300 r/min,80 mm,70°,and 62 mm,respectively.The blade roller structure was the double helix mode,with the rotary blade model of IT245.The soil operation was then simulated under the optimal combination in the farm test field.The surface flatness was achi

关 键 词：离散元 田口法 联合整地机 分段反螺旋刀辊 地表平整度 

分 类 号：S224.4[农业科学—农业机械化工程]