旋耕-碎茬通用刀片结构参数优化试验

Optimization Experiment of Structure Parameters of Rototilling and Stubble Breaking Universal Blade

以L型碎茬刀及宽型旋耕刀为基础,设计了9种旋耕-碎茬通用刀片。通过土槽单刀功率消耗(扭矩)试验确定了通用刀片的结构参数为:弯折角67°、弯曲半径20 mm、正切刃滑切角12°、单刀作业幅宽60 mm。并分别进行了通用刀片与国标旋耕刀的旋耕对比试验及通用刀片与批量生产的碎茬刀切断对比试验。试验结果表明,通用刀片单位幅宽功率消耗小于国标旋耕刀,但大于常用碎茬刀;单刀幅宽相同条件下,通用刀片功率消耗低于旋耕刀及碎茬刀,表明通用刀片结构参数选择合理可行。

Based on the L-type stubble breaking blade and the wide rototilling blade, nine kinds of universal blades were designed. The optimum structure parameters of the universal blade were determined through the power consumption （torque） test of a single blade in a soil bin. The main structure parameters of the universal blade were as follows： the bend angle was 67°, bending radius was 20 mm, sliding cutting angle of the frontal cutting edge was 12°, and the working width of a single blade was 60 mm. The rototilling contrast tests between the universal blade and national standard rototilling blade and stubble cutting contrast tests between the universal blade and the mass produced stubble breaking blade were conducted. The test results show that： the power consumption per unit working width of the universal blade was less than that of national standard rototilling blade, but more than that of the typical stubble breaking blade. When they had the same width, the universal blade power consumed was less than the national standard rototilling blade and the typical stubble breaking blade, which proved that it was reasonable and feasible to select the structure parameters of the universal blade.