Design and experiment of high-speed straw cleaning unit with double air springs  

作　　者：Xiaomeng Xia Honggang Li Shuyan Liu Ruiqiang Ran Yongjian Cong Yuhan Jin Dongyan Huang 

机构地区：[1]School of Biological and Agricultural Engineering,Jilin University,Changchun 130022,China [2]Key Laboratory of Bionic Engineering,Ministry of Education,Jilin University,Changchun 130022,China [3]Jilin Agricultural Machinery Research Institute,Changchun 130022,China

出　　处：《International Journal of Agricultural and Biological Engineering》2024年第4期89-97,共9页国际农业与生物工程学报（英文）

基　　金：supported by National Key Research and Development Program of China(Grant No.2023YFD1500404);Jilin Science and Technology Development Plan(Grant No.20220508113RC).

摘　　要：No-tillage planters need to be equipped with row cleaners to remove post-harvest plant residue from the seedbed.The two-disc row cleaners cannot effectively remove the plant residue at high speed because the working depth is unstable,which leads to poor seeding quality of the seeder.A straw cleaning unit with double air springs was designed to achieve better straw cleaning performance at high speeds.The analysis of the mechanical characteristics of the double air spring system showed that it enabled separate adjustment of force and stiffness.A dynamic model of the straw cleaning unit was established,and the effectiveness of the double air spring system with adjustable stiffness in stabilizing the working depth of the row cleaners was analyzed.Field experiments were conducted to evaluate the straw cleaning performance and consistency of downforce against the ground of the straw cleaning unit with double air springs at different high speeds.The results showed that the stiffness of the double air spring system for better straw cleaning performance of the straw cleaning unit was different at different working speed,and the required stiffness increased as the working speed increased;When the working speed was 8-12 km/h,the coefficient of variation of cleaned strip width was 6.9%-12.1%,the straw cleaning rate was 81.6%-92.2%and the root mean square error of downforce was 19.93-28.63 N;the coefficient of variation of cleaned strip width was moderately positively correlated with the root mean square error of downforce,and the cleaned strip width consistency was better when the root mean square error of downforce was lower than 25.00 N.

关 键 词：conservation tillage row cleaners straw cleaning unit double air spring system 

分 类 号：S223.2[农业科学—农业机械化工程]