ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Aiming at the problems of insufficient seed filling and difficult seed cleaning caused by irregular shape and uneven size of Pinellia ternata seeds, based on the characteristics of chain flipping motion, a method of using rotational inertia force for seed cleaning was proposed. A chain spoon upturned tail self-cleaning Pinellia ternata precision seeder was designed, which improved the seed filling rate and achieved rapid seed cleaning through the spoon upturned tail structure and water droplet shaped holes. By analyzing the force and motion state of seeds during the working process of the seeder, the working principle of the chain spoon self cleaning seeder with upturned tail was explained. Through theoretical calculations and kinematic analysis, simulation experiments were conducted based on DEM-MBD coupling to analyze the effects of different spoon filling angles, chain tension forces, and spoon shaped hole structural parameters on the performance of the seeder. The structural parameters of the seeder were determined. A quadratic regression orthogonal rotation combination simulation experiment was designed to determine the optimal structural parameter combination for spoon shaped holes: spoon shaped hole length was 18.6mm, spoon shaped hole width was 14.1mm, and spoon shaped hole retention depth was 8.6mm. To determine the optimal operating parameters of the seeder, a quadratic regression orthogonal rotation combination bench test was conducted with the driving sprocket speed and seed layer height as experimental factors. The experimental results showed that when the driving sprocket speed of the seeder was 39.2r/min and the seed layer height was 206mm, the operational performance of the seeder was optimal, with a qualification index of 93.37%, a replay index of 2.17%, and a leakage index of 4.46%, the research results can provide a reference for the design of seeders for bulbous Chinese medicinal materials.