Authors

Abstract

Aiming at the issues of high energy consumption and poor quality resulting from the compacted and heavy soil in the saline-alkali lands of the Yellow River Delta, this paper systematically analyzes the dynamic characteristics of rotary blade and soil, investigates the influence of rotary tillage blade structural parameters on the tillage performance of saline-alkali soils, designs a blade edge curve based on the sliding cutting effect, and identifies the primary factors and their value ranges that influence the energy consumption of rotary tillage blades. Using EDEM software, combined with a second-order orthogonal rotation center combination test, the test factors were bending angle, working width, and tangent face height, and the test indicator was operational power consumption. Analysis was conducted using Design-Expert 13, resulting in the optimal structural parameter combination for the rotary blade being a bending angle of 136.49°, working width of 34.20 mm, and tangent plane height of 42.23 mm. The theoretical operating power consumption at this point is 36.64 kW. To verify the accuracy of the experiments, field comparison tests were conducted. The results showed that under the same operating conditions, the operational power consumption of the designed rotary blade is 38.49 kW, representing a 16.07% reduction compared to traditional rotary tiller blades. This provides theoretical reference for the development and utilization of saline-alkali land and the reduction of resistance and improvement of efficiency in rotary tillers.

Abstract in Chinese

针对黄河三角洲盐碱地土壤板结黏重而导致的旋耕作业功耗高、质量差等问题，本文系统分析了旋耕刀-土壤动力学特性，探究了旋耕刀结构参数对于盐碱地土壤耕作性能的影响规律，设计了一种基于滑切效果的刃口曲线，确定了影响旋耕刀作业功耗主要因素和取值范围。通过EDEM软件，结合二次正交旋转中心组合试验，以弯折角、工作幅宽、正切面高度为试验因素，以作业功耗为试验指标，通过Design-Expert 13进行分析，得到了旋耕刀最佳结构参数组合为弯折角136.49°、工作幅宽34.20mm、正切面高度42.3mm，此时的理论作业功耗为36.64kW，为验证试验准确性，开展田间对比试验，结果表明，在相同工况下，设计的旋耕刀作业功耗为38.49kW，相较传统旋耕刀作业功耗降低了16.07%，为盐碱地开发利用与旋耕机减阻增效提供理论参考。