平动型油菜开沟器刀刃形状对降阻的影响——基于LS-dyna

开沟器是油菜播种机的核心部件,影响着播种机的工作性能和油菜出芽率。为了改善开沟器的入土性能和减小开沟器工作阻力,本文运用LS-dyna软件对小型手扶式油菜播种机的开沟器切削土壤进行了仿真,并对比分析了6种不同刀刃形状开沟器的工作阻力。结果表明:在其它参数和约束条件相同的条件下,开沟器以0.8 5 m/s前进时,锐角式开沟器的工作阻力小于钝角式开沟器;刀刃为曲线的锐角式开沟器的工作阻力小于刀刃为直线的锐角式开沟器;刀刃为凹曲线的锐角式开沟器的工作阻力小于刀刃为凸曲线的锐角式开沟器;刀刃为曲—曲组合式的开沟器在运行平稳后的工作阻力比刀刃为单一式的开沟器运行平稳后的工作阻力小。

The Resistance-reducing Influence of Cutting Edge Shape of Translational Coleseed Colter-Based on LS-dyna

Colter is the core component of coleseed seeder , it affects the working performance of seeder and coleseed seeder sprouting , in order to improve the soil piercing performance and reduce the working resistance of the colter .the colter cut soil about small working coleseed seeder using the LS -dyna software in this paper , comparison and analysis working resistance of six different cutting edge shape colter .With the other parameters are same , the results show that under the colter with 0.84 m/s, the work resistance of the acute angle colter is smaller than the work resistance of the obtuse angle coler , the work resistance of the acute angle colter of the curve cutting edge shape is smaller than the work resistance of the obtuse angle coler of the straight line cutting edge shape , the work resistance of the acute angle colter of the lower concave curve cutting edge shape is smaller than the work resistance of the obtuse angle coler of the upper con -vex curve cutting edge shape , the stability operation work resistance of curve-curve combined cutting edge shape is smal-ler than the stability operation work resistance of single edge shape .