Model construction of soybean average diameter and hole parameters of seed-metering wheel based on DEM

Guoqiang Dun,Wenhui Liu,Cheng Zhou,Xingpeng Wu,Ning Mao,Zhiyong Gao

doi:10.25165/j.ijabe.20221501.5914

Abstract

To satisfy the demands of soybean precision sowing, this article starts with statistics of the physical parameters of soybean seeds in Heilongjiang province, China. The filling process of soybean seeds was analyzed, and the ratio relationship between the diameter, depth, chamfer length of seed-metering wheel’s holes and the mean diameter of soybean seeds was determined. EDEM was used to simulate seeding circumstances of hole seed-metering wheel with different holes’ sizes. The hole diameter ratio, hole depth ratio, and chamfer length ratio were the test factors, while the percentage of single multiple and the empty seeds were test indexes. The triple quadratic regression orthogonal rotation combination test was designed, and the mathematical model between test indexes and test factors was established. Results showed that the influence of hole diameter ratio and hole depth ratio was significant (p 0.05). The chamfer length ratio was 0.15, the hole diameter ratio was 1.63-1.73, the hole depth ratio was 0.81-1.20, the quality of seeding index was more than 90, and multiple and missing indexes were less than 6% and 4%, respectively. The soybean hole wheel seeding device was produced under the optimal parameter combination, to perform a comparative verification test with non-optimized parameters. The test showed anastomotic simulation results, verified the validity of the simulation. The seeding device after optimization expressed the best operating performance, which might satisfy the demands of soybean precision sowing. The study results can provide a theoretical reference for the optimization design of soybean seeding devices. Keywords: agricultural machinery, soybean, seed-metering device, hole seed-metering wheel, EDEM simulation, optimization DOI: 10.25165/j.ijabe.20221501.5914 Citation: Dun G Q, Mao N, Gao Z Y, Wu X P, Liu W H, Zhou C. Model construction of soybean average diameter and hole parameters of seed-metering wheel based on DEM. Int J Agric & Biol Eng, 2022; 15(1): 101–110.

Highlights

To satisfy the demands of soybean precision sowing, this article starts with statistics of the physical parameters of soybean seeds in Heilongjiang province, China
Jia et al.[9] designed an air-suction mechanical compound soybean seeding device in view of the technical problem that a large number of seed metering devices are prone to leakage when negative pressure plummets, which further improved the performance of high-speed precise seed metering devices
Current research analyzed the physical parameters of the soybean seeds in Heilongjiang province, China, and conducted a theoretical analysis with the filling process of soybean seeds, and the hole seed-metering wheel is seen as the research object, with the design of three factors five levels quadratic orthogonal rotating test, the 3D model of seeding device is established to do discrete element simulation experiment, and combining the response surface method to optimize the best parameters of holes, based on the parameters to make hole seed-metering wheel, which is one part of soybean hole wheel seeding device[13] with the bench comparison verification test, to verify the optimization of the parameters

Summary

Introduction

To satisfy the demands of soybean precision sowing, this article starts with statistics of the physical parameters of soybean seeds in Heilongjiang province, China. The research on the precise soybean sowing in China mainly focuses on whether the soybean seeds can be filled into the holes of the seed-metering wheel accurately. Current research analyzed the physical parameters of the soybean seeds in Heilongjiang province, China, and conducted a theoretical analysis with the filling process of soybean seeds, and the hole seed-metering wheel is seen as the research object, with the design of three factors five levels quadratic orthogonal rotating test, the 3D model of seeding device is established to do discrete element simulation experiment, and combining the response surface method to optimize the best parameters of holes, based on the parameters to make hole seed-metering wheel, which is one part of soybean hole wheel seeding device[13] with the bench comparison verification test, to verify the optimization of the parameters.

Methods

Results

Conclusion