农业机械学报2026，Vol.57Issue(12)：142-152,11.DOI:10.6041/j.issn.1000-1298.2026.12.013
大方捆机玉米秸秆切碎装置设计与试验
Design and Experiment of Corn Stalk Chopping Device for Large Square Baler
摘要
Abstract
Aiming to address the problems of high cutting power consumption,excessive chopped length,and poor length uniformity of the chopping device of a large square baler under high feeding-rate conditions,a self-developed experimental bench for chopping corn stalks in a large square baler was used to carry out multi-objective optimization of operating parameters.Based on the shearing structure composed of moving and fixed knives,the force characteristics of the stalk chopping process and the effect of chopping clearance on the shearing state were analyzed,and the reasonable ranges of chopping rotor speed,feeding speed,and chopping clearance were determined through single-factor experiments.The Box-Behnken response surface method was employed to establish quadratic regression models between the operating parameters and the average chopped length as well as the average operating torque,and to analyze the effects of multiple factors and their interactions on chopping quality and energy consumption.The results showed that the order of influence of the factors on the overall performance,from the greatest to the least was as follows:chopping clearance,chopping rotor speed,and feeding speed.Through multi-objective optimization,the optimal parameter combination was determined as chopping rotor speed of 74 r/min,feeding speed of 1.4 m/s,and chopping clearance of 66 mm.Under these conditions,the model predicted an average chopped length of 77.56 mm and an average operating torque of 66.13 N·m.Compared with a typical high-load operating condition(chopping rotor speed of 68 r/min,feeding speed of 1.6 m/s,and chopping clearance of 56 mm),the average chopped length was reduced by 8.99%,the average torque was reduced by 21.5%.Field validation tests showed that under the optimized parameters,the measured average chopped length was 83.32 mm,with a relative error of 7.4%from the predicted value.The operation process was stable and met the operational requirements of large square baling.关键词
玉米秸秆/大方捆机/切碎装置/作业参数/田间试验Key words
corn stalk/large square baler/chopping device/operating parameters/field experiment分类
农业科技引用本文复制引用
车犇,付君,刘凤双,薛钊,郑宜强..大方捆机玉米秸秆切碎装置设计与试验[J].农业机械学报,2026,57(12):142-152,11.基金项目
国家重点研发计划项目(2022YFD2002102)和吉林省农机研发制造推广应用一体化试点项目(3D5260554418) （2022YFD2002102）
