Authors

Abstract

Because of the low impurity removal rate and high damage rate of the potato combine harvester during the working process, a new type of impurity removal device for the potato combine harvester was designed. The device was mainly composed of retaining plates, impurity removal rollers, smooth rollers, and a control system. To determine the best working parameters of the device, the rotational speed of the rollers, the distance between two rollers, and the inclination angle of the device were used as the test factors. The impurity removal rate and damage rate were employed as the evaluation indexes. Then, the single factor test and the second rotation orthogonal regression test were performed. The optimum combination after parameter optimization was determined to be as follows: rotational speed of the rollers was 113.4r/min, the distance between the two rollers was 97.5mm and the inclination angle of the device was 10.4°. The corresponding impurity removal rate was 95.12%, and the damage rate was 0.54%. The device can better meet the requirements of impurity removal operations.

Abstract in English

针对马铃薯联合收获机除杂过程中除杂率低、伤薯率高的情况，设计了一种用于马铃薯联合收获机的新型除杂装置。该装置主要由挡土板、除杂辊、光辊、控制系统等组成。为确定装置的最佳工作参数，以辊速、辊距和装置倾角为试验因素，以除杂率和伤薯率为评价指标，进行了二次旋转正交回归试验。获取了最优参数组合为辊速113.4r/min、辊距为97.5mm和装置倾斜角度为10.4°。最优参数下的验证试验结果表明，平均除杂率为95.12%、平均伤薯率为0.54%。该装置能较好地满足马铃薯除杂作业要求。