Drive-guided Combination Slot-assisted Seed-attached Air-absorbing Peanut High-speed Precision Seed Meter

WANG Dongwei, JI Ruiqi, HE Xiaoning, GUO Peng, SHI Yanxin, ZHANG Chunxiao

Abstract

In view of the technical problems of low sowing quality caused by re-sowing and serious leakage of seeds when the existing air-absorbing seed meter was used for high speed sowing operation, a combination of repellent and guide slot auxiliary seed attachment air-absorbing peanut high-speed precision seed meter was designed. The design of the seed discharge performance under high-speed operation was carried out. The theoretical modeling analysis verified the rationality of structure design of the seed discharge disc and initially completed the determination of key parameters. In order to further optimize the size of seed churning recess and seed pick-up slot, the influence of key parameters on seed transport was analyzed with the help of discrete element simulation software, and a two-factor, five-level quadratic orthogonal rotational combination test and regression analysis were conducted to further optimize the structural parameters. The optimal combination of the following parameters was obtained: the depth of the seed churning recess was 3mm, the radius of base circle of churning recess was 70mm, the distance between left and right edges of seed picking slot was 24.0mm, the distance between lower edge of seed picking slot was 19.1mm, the depth of seed picking slot was 10.5mm, and the distance from outer circumference of seeding disc to rear end of seed picking slot was 24.0mm. When the wind pressure was -6kPa and the operating speed was in the range of 6~12km/h, the particle spacing qualification index was no less than 93.33%, the reseeding index was no more than 3.52%, the omission index was no more than 4.02% and the breakage index was no more than 0.32%, which had good operating performance.


Keywords: peanut air-absorbing seed meter, high-speed precision, drive-guided combination

 

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References


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