Research on Receiving Seeds Performance of Belt-Type High-Speed Corn Seed Guiding Device Based on Discrete Element Method

Abstract

Because the initial speed of the seeds leaving the seed disk is too high, they collide and bounce off the inner wall of the seed guide tube, resulting in poor sowing quality when corn is sown at high speeds above 12 km/h. This study clarifies the primary factors affecting the stability of seed receiving and the accuracy of the seed entering the seed cavity, establishes the dynamic model of seed clamping, transportation, and releasing, and investigates the belt-type high-speed corn seed guiding device with the seed receiving system as the research object. It also proposes an improved method of adding herringbone lines on the finger surface to address this issue. Using EDEM software, a virtual experiment of seed-receiving performance was conducted, and the change trend of stress on seeds with and without a herringbone pattern and different wheel center distance as well as the change trend of the speed of seeds with various feeder wheel speeds and finger length, were both examined. The outcomes of the simulation demonstrate that the herringbone-lined feeder wheel could increase the stress on seeds. The average value of the stress on the seeds is the highest at the wheels’ center distance of 37 mm. The stability and speed fluctuation of seeds introduced into the seed cavity were better when the feeder wheel speed was 560 r/min. The speed of fluctuation and stability of the seeds introduced into the seed cavity were better when the finger length was 12 mm. The high-speed camera test on the test bench was used to verify the seed guiding process in accordance with the simulation results, and the outcomes were largely consistent. The study’s findings can serve as a theoretical foundation for a belt-type high-speed corn seed guiding device optimization test.

An Experimental Analysis of the Seed-Filling Mechanism of Maize-Precision Hole-Planter Clamping

“…The main reason for this is that bench testing generates vibrations. Vibration is a non-negligible factor in agricultural machinery [29][30][31], so the results of the bench tests were closer to the real situation. However, the bench tests had long lead times and did not allow for a detailed observation of seed movement.…”

Design and optimization of the seed conveying system for belt-type high-speed corn seed guiding device

“…Accordingly, the speed ratio between the driving pulley and the seed disk is 13.45, 20.08, or 26.89. In this study, in order to select the appropriate number of seed cavities, it was determined by discrete element simulation [17][18][19][20][21] .…”

“…The results showed that this method could effectively reduce the coefficient of variation and miss rate of seed spacing and improve the seeding accuracy and uniformity. Liu et al [17] conducted dynamic analysis and simulation on the flexible belt seed delivery device, established a contact force model between the flexible belt and the seeds, and analyzed the effects of parameters such as tension, speed, and stiffness of the flexible belt on the seeding process, providing a theoretical basis for the design and optimization of the flexible belt seed delivery device.…”

Design and experiment of impeller seed guide device for rice internal suction hole direct seeding device

“…For the grains with a small diameter, such as rice seeds and rapeseed, it is easy to be clipped into the gap during the grain guide process, resulting in extrusion friction between the grains and the shell of the seed guide device. Therefore, this delivery method is suitable for grains with large diameter and di cult to be clamped into the gap, such as corn 12 . High-speed grain transportation using positive pressure air ow pipes is widely used in corn, wheat, sesame and other crops, but it is applied to xed-distance multi-grain hole sowing, and spindle-shaped rice seeds still have great challenges.…”