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

In order to solve the problem of low degree of precutting sugarcane planting machine in China and the problems such as the difficulty of fillingseed process, the serious missed seeds and the easy damage of seeds caused by the poor adaptability of sugarcane seed to seedmetering device with seed spoon, a kind of design and test of precutting and spoon seedmetering device for sugarcane was designed. The elaboration on the operating principle of the role of seed spoon, downhill line improving the performance of type seedmetering device with seed spoon angle in every part of fillingseed was made, which through theoretical design and dynamic analysis of the structure of the seed spoon, using the steepest descent line and the inclination angle of the seed spoon to increase the filling speed of the seed spoon and improve the filling performance of the seed metering device. The basic parameters of seed spoon were obtained through the calculation of the kinematic analysis of theoretical calculation and fillingseed process in accordance with the physical characteristics within the seed itself. And through the analysis of the seeds of stress state and motion state in the course fillingseed, the basic parameters of seed metering device were obtained. To be specific, the single factor test was conducted through the EDEM discrete element simulation analysis, and the basic parameters of seed metering device were further ascertained by analyzing the influence of different structural parameters to fillingseed. Then the quadratic regression orthogonal rotation combination test was done, which was based on the single factor test. The quadratic regression orthogonal rotation combination test rotation rate of operating speed, seed metering device dip angle and seeds height were taken as the test factors, and the qualifiedseeding index, the multipleseeding index and the missseeding index were taken as the test index, the influence of the interaction of each test factor on the qualification rate was analyzed. After optimizing the test parameters, the qualification rate of the seedmetering device was 95.33%, the missseeding index and the multipleseeding index were 3.11% and 1.56%, the best parameter combination was the seeds height of 360mm, the operating speed of 1.45~2.37km/h, the seed metering device dip angle of 9.53°~15.15°, the relative error between the test verification result and the simulation optimization result matched. The results showed that the precutting and spoon seedmetering device for sugarcane could fully meet the sugarcane requirements of planting.