关键词: 玉米剥皮装置, 离散元, EDEMRecurDyn耦合, 柔性化模型, 台架试验

Abstract: Research work on maize is always limited by the short harvesting period and the high labor intensity of harvesting. The pressure feed wheels in the maize peeling device are made of rubber and can deform greatly in practice, making it difficult for ANSYS and EDEM software to build a flexible working simulation model for them. In order to address the above problems, a flexible simulation model of the maize peeling device is established in this paper by coupling EDEM and RecurDyn. The simulation is based on three operating conditions with peeling roll and press wheel speed as test factors. The results show that when the speed of peeling roller is 480 r/min, the speed of pressure feed wheel is 96 r/min, and the feeding speed is 500 kg/h, the average force of corn cob is 15.65 N, the variance of the force is 7.80, and the rotation speed of cob around its own axis is 58.86 r/min, which is the most stable force and fast rotation speed of corn under the working condition. With the cob peeling rate, seed drop rate and kernel breakage rate as the test index for bench test to verify the simulation, when the peeling roller speed of 480 r/min, the pressure feed wheel speed of 96 r/min, feeding speed of 500 kg/h, the cob peeling rate of 90.22%, the seed drop rate and kernel breakage rate of 0.97% and 1.07%, peeling rate at the same time, the drop rate and kernel breakage rate of lowest. Breakage rate were the lowest, and the experimental and simulation results coincided with each other. This study shows that the use of EDEMRecurDyn coupling to establish a discrete simulation model of the corn peeling device can provide preliminary guidance for the subsequent test work of the corn peeling device, with compressing the test time and reducing the labor burden.

Key words: maize peeling device, discrete element method, EDEMRecurDyn coupling simulation, flexible models, bench tests