关键词: 马铃薯, 收获机, 振动挖掘, 伤薯率, 明薯率, 试验

Abstract: In order to solve the potato mechanization harvesting problem in hilly and mountainous area, according to the mechanism of drag reduction, this paper designed a vibration digging type potato harvester with the hand tractor as a power source. Working mechanism of vibration digging device and the kinematics and dynamics characteristics of vibration digging shovel were analyzed, and the structure and working parameters of vibration digging shovel were determined. The quadratic orthogonal rotation combination experiment of three factors were carried out with the moving forward speed, the digging shovel vibration frequency and the digging shovel vibration amplitude as experimental factors, the damage rate and obvious rate as experimental index. The mathematical model between the experimental factors and the experimental indexes was established and the variance of test data and regression equation was analyzed using data processing system software. The moving forward speed of 0.85 m/s, the digging shovel vibration frequency of 12 Hz and the digging shovel vibration amplitude of 14.5 mm were the best combination factors by optimization, which leaded to the damage rate of 1.21%, the obvious rate of 98.51%. Verification experiment results under the optimal parameter combination showed that the average damage rate of 1.28%, the average obvious rate of 98.48%, the working performance can meet requirements of potato harvest.

Key words: potato, harvester, vibration digging, damage rate, obvious rate, experiment