In order to investigate the effects of hole seeder speed and initial seed velocity on hole seeder seeding performance,the working principles of the split seeding system and hole seeder are described.The cottonseed and hole seeder simulation model was established using EDEM to simulate different initial speeds of cottonseed and hole seeder at different rotational speeds and to analyze the causes of missed seeding and reseeding according to the trajectory curve,force change curve,and speed change curve.A two-factor,five-level quadratic rotational orthogonal test design was conducted using Design-Expert to establish regression equations for the evaluation indexes,and response surfaces analyzed the seeding performance.The compliance rate increased and then decreased with the increase of the hole sower speed and decreased with the rise of the initial seed speed.The optimized parameters were 39 r/min and 2.4 m/s seed initial velocity,resulting in a 3.2％miss rate,95.1％pass rate,and 1.7％reseed rate.The results of the bench validation test show that the simulation test is credible and the seed row performance of the hole sower meets the requirements of high-speed precision sowing,which can provide a reference for the mechanized high-speed precision hole sowing technology and development of cotton in Xinjiang.
关键词
棉种/排种性能/穴播器/精量播种/离散元法
Key words
cottonseed/seeding performance/hole seeder/precision seeding/discrete element method
维普
万方数据