Abstract: In order to solve the problems of the ambiguous separating mechanism of swing separation sieve and the improper match of operation parameters, by field experiment this paper obtained variation rule of separation sieve parameters such as the displacements of potato relative to sieve on the soilless sieve surface and soil sieve surface, sieve inclination and average machine forward velocity etc.,and the relationship between the indexes and the factors. The results showed that the fluctuation amplitude of potato relative to sieve increased first and then decreased with the crank speed raise, reduced with the increase of sieve inclination, and increased with the increment of machine forward speed. The fluctuation amplitude of potato at the soil sieve surface was higher than that at the soilless sieve surface. The obvious rate and abrasion rate both increased first and then decreased with the increment of crank rotational speed. With the enlarged sieve inclination, the obvious rate and abrasion rate were both declined and then increased. The effect of the machine forward speed on the obvious rate was not significant. The abrasion rate showed a tendency of first decreased and then increased with the increased machine forward speed.

Key words: potato digger, swing separation sieve, potato, displacement, performance of separation sieve

摘要： 为解决摆动分离筛薯土分离机理不明确，分离筛参数匹配不尽合理的问题。通过田间试验，获得了无土和有土筛面上马铃薯相对分离筛的位移随曲柄转速、筛面倾角和机器前进平均速度等参数的变化规律，以及分离筛性能指标随参数的变化关系。试验结果表明：马铃薯相对分离筛位移的波动幅度随着曲柄转速的升高而先增大后减小，筛面倾角越大马铃薯相对分离筛位移的波动幅度越小，机器前进平均速度越大位移的波动幅度越大；有土筛面上马铃薯相对分离筛位移的波动幅度较无土筛面上马铃薯位移的波动幅度大；明薯率和破皮率随着曲柄转速的增加而先增大后减小，随着筛面倾角的增大而先减小后增大；机器前进平均速度对明薯率影响不明显，破皮率随着机器前进平均速度的增加而先减小后增大。

关键词: 马铃薯挖掘机, 摆动分离筛, 马铃薯, 运动位移, 分离筛性能