摘要
为探索原茬地播种机种床整备侧向滑切清秸刀齿对机具作业过程中秸秆缠绕度、振动强度、功率消耗和覆秸均匀度的影响,在阐述侧向清秸装置结构和工作原理基础上,对侧向滑切清秸刀齿结构及滑切面工作曲线进行了设计,确定了影响刀齿工作性能的关键结构与工作参数。应用四因素三水平正交试验方法,选取初始半径、起始滑切角、刀轴角速度和机具作业速度为影响因素,以秸秆缠绕度、振动强度、当量功耗和覆秸均匀度为评价指标,对影响机具作业性能的刀齿结构和工作参数组合进行优化分析。结果表明:在初始半径200mm、起始滑切角30°、刀轴角速度42rad/s、机具作业速度7.2km/h条件下,无秸秆缠绕,振动强度为159m/s^2,当量功耗为4.9kW,覆秸均匀度为0.075。对比试验表明,优化后刀齿组合振动强度降低了46.5%,当量功耗降低了29.7%,工作过程中未出现机具堵塞现象。
In order to explore the influence of the side-direction straw-cleaning blade for seedbed treatment of original stubble planter on straw winding,vibration intensity,power consumption and straw mulching uniformity during machine operation,the structure and working principle of side-direction strawcleaning device was introduced,the structure of side-direction straw-cleaning blade and the working curve of slippery cutting surface was designed,and the key structure and working parameters affecting the working performance of the blade were determined. By using four factors and three levels orthogonal test method,the initial radius ρ0,initial slip angle τ0,blade carrying shaft angular velocity ω and tool operating speed vmwere selected as the influencing factors,and the straw winding,vibration intensity,equivalent power consumption and straw mulching uniformity were taken as the evaluation indexes. The optimal analysis of the structure and working parameters combination of the blade affecting the tool operating performance was carried out. For straw winding,the order of primary and secondary effects was as follows: initial slip angle,initial radius,tool operating speed and blade carrying shaft angular velocity;for vibration intensity,the order of primary and secondary effects was as follows: tool operating speed,initial slip angle,blade carrying shaft angular velocity and initial radius;for equivalent power consumption,the order of primary and secondary effects was as follows: tool operating speed,initial slip angle,blade carrying shaft angular velocity and initial radius. Under the conditions with the initial radius of 200 mm,the initial slip angle of 30°,blade carrying shaft angular velocity of 42 rad/s and tool operating speed of 7. 2 km/h,there was no straw winding,vibration intensity was 159 m/s^2,equivalent power consumption was 4. 9 kW,and straw mulching uniformity was 0. 075. Compared with the existing combination of cutters and teeth,the vibration intensity was decreased by 46. 5%,equivalent power consumption was decreased by 29. 7%,and there was no tool blockage in the working process. The research results can provide theoretical and experimental data support for the design of key components of lateral straw cleaning device of 2 BMFJ series no-tillage straw mulching precision seeder.
作者
侯守印
陈海涛
邹震
史乃煜
HOU Shouyin;CHEN Haitao;ZOU Zhen;SHI Naiyu(College of Engineering,Northeast Agricultural University,Harbin 150030,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2019年第6期41-51,217,共12页
Transactions of the Chinese Society for Agricultural Machinery
基金
现代农业产业技术体系建设专项资金项目(GARS-04)
国家重点研发计划项目(2018YFD0201004)
北方寒地现代农业装备技术重点实验室开放项目(KF18-05)
关键词
免耕播种机
侧向滑切
清秸刀齿
no-tillage planter
side slip cutting
straw-cleaning blade
