Design and Experiment of Passive Anti-winding Stubble Breaking and Ridge Cleaning Device for No-tillage Planter

Currently, during the no-tillage planting operation of corn ridge in Northeast China, there are issues such as entanglement and blockage of working parts, soil disturbance reduction, and improvement of stubble breaking and ditching quality. To address these issues, the anti-winding stubble breaking and clearing device was optimized, consisting of the Archimedes spiral serrated notch disc stubble cutter and star ridge cleaning wheel. Through theoretical analysis, the main parameters affecting the performance of the stubble clearing and ridge cleaning device were identified as the tool forward speed, the depth of the stubble cutter in soil, and the offset angle of the ridge clearing wheel installation. To determine the optimal working parameters of the device, the second-order regression orthogonal rotation combination simulation experiment was conducted by using the discrete element software EDEM. Through this experiment, the optimal working parameter combination of the device was obtained, which included a tool forward speed of 7 km/h, a stubble cutter depth of 75 mm, and a ridge clearing wheel installation offset angle of 30°. Field experiments were conducted to verify the optimal parameter combination, and the results indicated that the stubble breaking rate of the Archimedes spiral sawtooth notch disc stubble breaker was 92.21% and the stubble clearing rate was 93.49%, which significantly improved the trafficability of machines and tools. The simulation theory results were verified by field experiments, meeting the technical requirements for the integration of ridge planting and no-tillage sowing agronomy and agricultural machinery in Northeast China. © 2023 Chinese Society of Agricultural Machinery. All rights reserved.