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在农田耕翻平整中,主要的动力源是拖拉机。由于各方面的原因,拖拉机在水田中的牵引效率还不高,行走装置的功率损失占全部损失的66％左右,机耕船的牵引效率最高也只约为40％。为了提高水田拖拉机的牵引效率,对轮刺和土壤相互作用时所产生的土壤流动形式的研究是优化叶轮参数的基础。本文利用平面应变塑性流动理论来研究单平板轮刺下的土壤流动形式和轮刺运动间的相互关系,建立单子板轮刺下的土壤流动近似场模型。
In farmland plowing, the main power source is the tractor. Due to various reasons, the traction efficiency of the tractor in the paddy field is not high, the power loss of the walking device accounts for about 66% of the total loss, and the highest traction efficiency of the cultivating vessel is only about 40%. In order to improve the traction efficiency of paddy field tractors, the research on soil flow patterns generated by the interaction between spikes and soil is the basis for optimizing impeller parameters. In this paper, the theory of plane-strain plastic flow is used to study the relationship between the soil flow patterns and the wheel motions under the single-plate wheel spikes, and the approximate field model of the soil flow under the single-