Design and Experiment of Precision Burrow Planter for Flax with Direct Current Scooping Type
Abstract
Aiming at the problem that the population is divided on both sides of the ladle chamber during the operation of the traditional burrow planter, the ladle chamber was not fully filled when the amount of seed in the seeding drum was small. Based on the physical characteristics of flax seeds and the requirements of planting and agronomy, a precise point planter for flax seed was designed. By analyzing the working principle of the burrow planter, the composition, chute structure and structural parameters of the direct current scooping ladle were determined. The motion analysis of the ladle scooping process and the clearing process was carried out, and the angular velocity range of the burrow planter was determined. Using the depth of direct current scooping ladle, the angle of bridge slot and the angular velocity of the burrow planter as test factors, and the pass rate, miss rate and replay rate of the burrow planter as test indexes, the quadratic rotation orthogonal combination test was carried out by using EDEM discrete element simulation software. The results showed that the best performance was obtained when the depth of direct current scooping ladle was 2.75 mm, the angle of bridge groove was 56.56°, and the velocity of burrow planter was 2.71 rad/s, the qualified rate of seed expulsion was 94.27%, the missed rate was 5.67%, and the replay rate was 0.06%. The average pass rate, miss rate and replay rate were 89.00%, 8.33% and 2.67%, respectively. The results of bench test were basically consistent with those of simulation test. The results showed that the seed discharge effect of direct current scooping ladle was better than that of tongue scoop. The qualified rate of seed placement can be increased by 3.39 percentage points, the missed rate can be decreased by 2.68 percentage points, and the replay rate can be decreased by 2 percentage points.
Keywords: flax, burrow planter, seed chute, direct current scooping ladle, EDEM
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