关键词: 马铃薯, 分选装置, 机械损伤, 离散元, 参数优化

Abstract: In the process of potato transportation and sorting, aiming at the problem that the skin damage caused by mechanical damage is very easy to rot and deteriorate during storage. Through the collision analysis of potatoes, the influencing factors of potato damage are determined, and the value range of the operating parameters of the sorting device is obtained. Taking the potato damage rate as the evaluation index, the conveyor belt speed, the movement speed of profiling roller and the potato slip drop as the test factors, the quadratic orthogonal rotation regression test of discrete element simulation analysis is carried out to analyze the influence law of various factors on the evaluation index. The results of parameter optimization showed that when the speed of conveyor belt was 0.32 m/s, the falling drop of potato was 103.5 mm, and the moving speed of profiling roller was 0.49 m/s, the minimum potato injury rate was 1.98%. The experimental results show that it meets the requirements of national standards and industrial standards during potato harvesting and sorting, and can provide technical reference for the design and optimization of the same type of potato machinery.

Key words: potato, separator, mechanical damage, discrete element, parameter optimization