基于离散元法的白菜播种机开沟器优化设计OA

The existing cabbage seeders struggle to meet the requirements of direct seeding due to the lack of key components integrated with agronomy.The furrow opener,a critical component responsible for creating the seed furrow,directly influenced sowing depth and,consequently,the yield of cabbage.To improve the stability of sowing depth in mechanized cabbage planting,the design and parameter optimization of the furrow opener were conducted based on the agronomic requirements of Chinese cabbage cultivation.A soil simulation model was developed using EDEM software,and orthogonal tests were carried out.The results identified the order of influence of factors affecting trenching depth stability as follows:triangular cone lower angle,triangular cone soil entry angle,and triangular cone surface wing angle.The optimal parameter combination was determined to be a surface wing angle of 44.122°,a triangular cone lower angle of 71.645°,and a soil entry angle of 135°.Simulation results using EDEM showed that the newly designed furrow opener exhibited a higher stability coefficient compared to that of a conventional vegetable seeder.Field tests further demonstrated that the soil stability coefficient of the new furrow opener reached 88.54%,while the qualified rate of sowing depth was 86%.