Structure Analysis And Performance Test Of The Millet Air-suction Metering Device

The air-suction metering device is an important part of the millet filming seeder, its performance will directly affect the quality of work of the millet air-suction filming seeder, and plays a vital role in the realization of millet precision seeding.In order to achieve the millet precision seeding,the metering plate of the original air suction metering device is improved.9 different air-suction seed hill-drop sowing plates which adapt to the kind of small particle size of crops such as millet to the sowing are designed.The seed plates are distributed by the suction hole groups, which can adsorb more seeds. At the same time, based on the familiar with the basic work principle and structure of the millet air-suction film laying seeder, the model of seeding plates and the seeding device are established by using three-dimensional design software Solidworks.The test of millet sowing performance on the computer vision seeding performance testing bench is conducted by utilizing the seeding plates. The experiment indicates that when the number of holes on the seed plate is 4, the seed plate aperture is 0.8 mm, the rotational speed of seed plate is 11 r / min, the vacuum degree is-1.2 kpa, the effect of millet precision seeding is better,the eligible index reached 94%, the multiple index is no more than 4%,the miss index is less than 2%.The test result laid the foundation for the design of the millet air-suction filming planter.