Authors

Abstract

To address problems such as frequent stubble entanglement and the heavy burden associated with separating potatoes from impurities during potato harvesting operations, a belt-type clamping and pulling device for potato stubble was developed to achieve complete stubble extraction. By analyzing the interaction between the stubble and the clamping and pulling belt (CPB), the causes of missed extraction and stubble breakage were identified, and the primary parameter ranges affecting extraction effectiveness were determined. An EDEM–RecurDyn coupled simulation model was established to investigate the stubble pulling process. Using the stubble breakage rate and stubble miss rate as evaluation indices, the main factors influencing pulling performance were identified as the forward speed of the device, the linear velocity of the CPB, and the ground clearance of the CPB. A three-factor, three-level orthogonal experiment was conducted, and quadratic regression models were developed with stubble breakage rate and stubble miss rate as response variables. Response surface analysis and parameter optimization were subsequently performed. The results indicate that at a device forward speed of 0.512 m/s, a CPB linear velocity of 1.08 m/s, and a CPB ground clearance of 50 mm, the stubble breakage rate and stubble miss rate were 6.45% and 8.73%, respectively. An experimental platform was constructed to validate the simulation results. Experimental tests showed that under the optimal parameter combination, the stubble miss rate was 7.5%, with a small relative error compared to the simulation results. These findings demonstrate that the proposed device meets the operational requirements for effective potato stubble pulling.

Abstract in Chinese

针对马铃薯收获机械在作业时易被秧茬缠绕和薯杂分离负担较重等问题,设计了一种带式夹拔型马铃薯秧茬夹拔装置实现秧茬的整根起拔.通过对秧茬与夹拔带之间的相互作用进行分析，确定了影响起拔效果参数的主要取值范围，阐明秧茬产生漏拔和拔断的原因。通过建立EDEM-RecurDyn耦合仿真模型，以机具前进速度、夹拔带转动线速度和夹拔带离地高度为试验因素，秧茬拔断率与漏拔率为评价指标，进行三因素三水平正交试验，建立以秧茬拔断率与漏拔率为相应指标的二次回归模型，通过试验结果响应面分析与参数优化。结果表明，在机具前进速度0.512m/s，夹拔带转速1.08m/s，装置离地高度50mm时，秧茬拔断率6.45%，漏拔率8.73%。通过搭建试验平台，对仿真结果进行验证，试验表明在最佳参数组合下，秧茬漏拔率7.5%，试验结果与仿真结果相对误差较小，装置满足马铃薯秧茬起拔作业设计要求。