Authors

Abstract

Mini-tiller is an indispensable agricultural machinery in hilly and mountainous areas of China. Rotary blade is an important working part of mini-tiller, which directly affects the operation quality and power consumption of mini-tiller. In order to reduce the cutting resistance and power consumption of the rotary blade of mini-tiller, the cutting process of the rotary blade was analyzed by numerical simulation, and the tangential bending radius (R), bending angle (β) and edge thickness (c) of the rotary blade were selected as factors to optimize it. After comparing the cutting resistance and cutting power consumption of the rotary blade before and after optimization, the results show that the cutting force of the optimized rotary blade is smaller than that of the rotary blade before optimization. The cutting power consumption of the optimized rotary blade is 2.4% lower than that of the unoptimized rotary blade, which achieves the purpose of drag reduction and consumption reduction.

Abstract in Chinese

微耕机是我国丘陵山区不可或缺的农业机械，旋耕弯刀是其重要的工作部件，直接影响其作业质量与功耗。为降低微耕机旋耕弯刀的切削阻力和功耗，本文通过数值模拟的方法对旋耕弯刀切土过程进行了分析，并选取旋耕弯刀的正切部弯折半径（R），弯折角（β），刃口厚度（c）作为因子对其进行了优化，优化前后旋耕弯刀的切削阻力和切土功耗的对比结果表明优化后的旋耕弯刀切削力小于优化前旋耕弯刀的切削力，旋耕弯刀切土功耗较优化前的旋耕弯刀切土功耗降低了2.4%，达到了减阻降耗的目的。