Authors

Abstract

Aiming at the difficulty and low efficiency of threshing green prickly ash, a small-sized integrated pruning, threshing and branch chopping machine driven by a DC motor was designed and studied. The dynamic and static analyses of the tubular straight-cut threshing device and the clamping traction roller-cutting device were carried out respectively. The results show that the maximum shear stress on the green prickly ash branch during the cutting and separation process is 0.156 MPa. The maximum stress on the cutting blade of the clamping traction roller-cutting device is 333.99 MPa, and the maximum strain is 0.0017, which fully meets the usage requirements. The response surface analysis experiment was conducted with the moisture content of green prickly ash branches and the motor speed as the influencing factors and the undamaged threshing rate as the index. After optimization and solution, it was found that when the moisture content of green prickly ash branches was 43% and the motor speed was 1488 r/min, the undamaged threshing rate reached 95.9%, and the integrated pruning, threshing and branch chopping machine for green prickly ash reached the optimal working state.

Abstract in Chinese

针对青花椒脱粒困难，效率较低，设计研究了一款采用直流电机驱动的小型整枝脱粒碎枝一体机。分别对管状直切脱粒装置和夹持式牵引滚切装置进行显示动力学和静力学分析，其结果表明，在切割分离过程中花椒穗枝受到的最大剪切应力为0.156MPa。夹持式牵引滚切装置的切割刀片所受的最大应力为333.99MPa，最大应变为0.0017，完全满足使用要求。以花椒穗枝含水率和电机转速为影响因素，以花椒未损伤摘净率为指标进行响应面分析试验，优化求解后得到在花椒穗枝含水率为43%，电机转速为1488r/min时，花椒未损伤摘净率达到95.9%，青花椒整枝脱粒碎枝一体机达到最优工作状态。