亚洲一区欧美在线,日韩欧美视频免费观看,色戒的三场床戏分别是在几段,欧美日韩国产在线人成

The “separatingguiding” thought which utilize the antiblocking mechanism to guide the straw to ascend and move along the rotating wheel was proposed. Based on this thought, a cleaning mechanism on account of Archimedes spiral was designed and tested. In theoretical analysis, it was found that the Archimedes spiral could guide the straw to move up along with the outline under all the forces from mechanism and other straw at the beginning of contact, later the straw obtained speed and was thrown away because of the increased centrifugal force and decreased holding force from straw. All the straw was moved in the same way and formed straw group flow, accordingly accomplished the straw shinnying and stacking. Besides, the moving behavior of straw individual and straw group were also investigated via DEM simulation. The field experiment was also done to investigate the performance of notillage maize planter and confirm the optimal working parameter of the Archimedes spiral antiblocking mechanism. The experimental results showed that there were no blockage and exposed seeds. It can be inferred that the optimal working parameter of Archimedes spiral mechanism was 7km/h of forward speed and 600r/min of rotational speed. The mechanism designed can provide reference for the design and optimization of the antiblocking mechanism of notillage maize planter.