Abstract: In order to reduce the potatoes drop damage in the process of sorting and explore the separator working conditions than can influence the potato drop damage, this paper took 'Helan15' as the experimental material, using the conveying speed, excluding force, the drop height and the moisture content of potato separator as the test factors, and potato drop damage level as the response value, Quadratic regression orthogonal rotation test was carried out. The malformed variance analysis of the test results was conducted by Design-Expert 8.0.6 software. The influence of each experimental factor on the damage level of potato drop was explored by response surface, and the optimal working parameters of potato sorter were determined. The results of the drop test showed that the order of the degree of influence on the damage level of potato drop was water content, drop height, conveying speed, and removal force. When the conveying speed was 0.3 m/s, the removing force was 15 N, the falling height was 45 cm, and the water content was 75.36%, the sorting machine had the lowest drop damage grade on potatoes. The actual drop damage grade of potatoes was 0.84, which fitted well with the predicted value.

Key words: potato sorter, drop injury, response surface, parameter optimization

摘要： 为减少马铃薯在分选过程中的跌落损伤,探讨分选机的工作条件对马铃薯跌落损伤的影响,以“荷兰15”马铃薯为试验材料,以马铃薯分选机的输送速度、剔除力、马铃薯的下落高度和含水率为试验因素,以马铃薯的跌落损伤等级为响应值,进行二次回归正交旋转试验,通过Design-Expert 8.0.6软件对试验结果畸形方差分析,并通过响应面探究各试验因素对马铃薯的跌落损伤等级的影响规律,确定马铃薯分选机的最佳工作参数。跌落试验结果表明:对马铃薯跌落损伤等级的影响程度主次顺序为马铃薯含水率、下落高度、输送速度、剔除力。当马铃薯输送速度为0.3 m/s,剔除力为15 N,下落高度为45 cm,含水率为75.36%时,在该参数组合下分选机对马铃薯跌落损伤等级最小。试验所得马铃薯的实际跌落损伤等级为0.84,该结果与马铃薯跌落损伤预测等级具有良好的拟合性。

关键词: 马铃薯分选机, 跌落损伤, 响应面, 参数优化