基于离散元法的纯电动旋耕机作业参数分析与优化OA北大核心CSTPCD

To address the issue of incompatibility between traditional rotary tillers and electric chassis,an innovative electric rotary tiller has been developed.Based on the characteristics of facility agriculture and relying on the electric chassis,a structural form and transmission system parameters for the electric rotary tiller were proposed.A discrete element simulation model of soil and tillage components was established using EDEM,and the simulation results were verified through field tests.Finally,the operating simulation parameters of the electric rotary tiller of the electric rotary tiller were optimized to obtain the best combination of operating parameters,thereby enhancing the performance of rotary tillage operations under power-limited conditions.Under the simulation conditions of a forward speed of 1 m/s,rotary tillage speed of 175 r/min,tillage depth of 14 cm,and tillage width of 0.8 m,the simulation analysis yielded an average power consumption of the rotary tiller shaft of 2.02 kW,an average soil throwing mass of 1.96 kg,and a soil crushing rate of 75.59%.Field experiments measured a soil crushing rate of 79.03%after operation,an average tillage depth of 13.86 mm,and a tillage depth stability coefficient of 97.99%,achieving the expected design goals.After optimization of the operating parameters,the average power consumption of the rotary tiller shaft was reduced by 15.84%,the average soil throwing mass was increased by 21.99%,and the soil crushing rate was increased by 10.62%.This provides an effective approach for the optimization of operating parameters for future electric rotary tillers.