Numerical Analysis of Friction-Filling Performance of Friction-Type Vertical Disc Precision Seed-Metering Device Based on EDEM

Abstract

A seed-metering device is a key component for precision seeding and the core component of precision seed-metering devices. Nowadays, high-speed seeding is a trend in the development of seed-metering devices, but the filling performance of mechanical seed-metering devices decreases under the condition of high speed. Therefore, this paper explores a controllable method to improve the filling force of seeds, thereby increasing the limit operation speed of the existing mechanical seed-metering devices, so as to achieve high-speed seeding. The friction-filling method of friction vertical disc precision seed-metering devices was numerically simulated using the DEM. In this paper, the relationship between the relevant parameters and seed-filling force was confirmed via comparing theoretical formulas. The friction-filling method was studied via numerical simulation and experimental verification. This research demonstrated that during the process of friction filling, the pressure on the side wall of the tube increased with the e exponent with the change in the position of the particles. When the friction coefficient between the particles and the side wall is less than the friction coefficient between the particles, the e exponent increases. A surge occurs when the ratio of the square tube side length to the particle radius is n3+2(n=1,2,3).

Design and Experiment of Adaptive Profiling Header Based on Multi-Body Dynamics–Discrete Element Method Coupling

“…The Hertz Mindlin with JKR contact model was also selected as the contact model. According to the relevant literature [23,24], the simulation parameters of soil particles are shown in Table 3. The contact model plays a crucial role in the discrete element method, and it is necessary to establish different contact models for different simulation objects.…”

“…The Hertz Mindlin with JKR contact model was also selected as the contact model. According to the relevant literature [23,24], the simulation parameters of soil particles are shown in Table 3.…”

Design and experiment of real-time reseeding system for transversal sugarcane planter with seeds pre-cutting

“…SolidWorks software is used for 3D modeling of the reseeding system, followed by importing the model in .step format into the EDEM software for simulation analysis. As per references [5,6], the materials of the seed box and rake roller are set as steel with a Poisson's ratio of 0.3, shear modulus of 7×10^10 Pa, and density of 7800 kg/m³. The rake tooth material is set as soft PVC with a Poisson's ratio of 0.32, shear modulus of 5.68×10^6 Pa, and density of 1282 kg/m³.…”