关键词: 免耕播种机, 精准调节, 镇压力, 镇压装置, 土壤紧实度, 作业阻力

Abstract: Aiming at the problems that the current corn notillage planter has poor compaction pressure effect and imprecise application of compaction pressure intensity, a precise adjustment device for the compaction pressure of notillage seeder was designed. The device was mainly composed of a flexible force transmission device, a compaction pressure strength adjusting mechanism, and a pressing wheel. The mechanical analysis of the flexible force transmission device was carried out to determine the mechanical properties of the flexible force transmission device; the stress of the roller was analyzed, the working process of the roller was determined, and the relationship between soil moisture content, rubber torsion angle, running speed and soil compactness and running resistance were sought. Using the finite element method combined with the workbench software, the flexible force transmission device was simulated and analyzed, and the relationship between the torque and the torsion angle was obtained. The field performance test was also carried out, and the orthogonal test was used to investigate the influence of soil moisture content, rubber torsion angle, and operating speed on the performance of the press device. The results showed that the primary and secondary order of each factor was rubber torsion angle, soil moisture content, and operation speed; the optimum combination was that the soil moisture content was 17093%, the working speed was 5.655 km/h, and the rubber torsion angle was 15°; the soil compactness was 56.8 kPa, and the working resistance was 109.6 N at this time. The test shows that the precise adjustment device of ballast pressure of notill planter can meet the agronomic requirements.

Key words: notillage seeder, precise adjustment, compaction pressure, press device, soil compactness, working resistance