Abstract: Aiming at the complex terrain of southern Ningxia, a potato harvesting and residual film collecting integrated machine is designed for complex terrain, which can complete potato digging and residual film recovery in one operation. The key components of the prototype were designed and selected to determine the structure and parameters of the digging blade, the S-shaped soil-potato dither conveyor device and the pneumatic residual film recovery mechanism. With ANSYS fluent, using two design parameters, the number of blades of the impeller and the rotation speed of the impeller, the comparison and analysis on the full pressure cloud diagram, velocity cloud diagram and velocity vector diagram of the internal flow field of the residual film collecting mechanism are carried out.When the number of blades of the impeller is 16 and the impeller rotation speed is 1 120r/min, the residual film collecting mechanism has the best effect on collecting residual film. The field experiment results showed that the soil-potato separation effect of this structure is significant. The residual film can be continuously sucked by the residual film collecting mechanism and transported to the residual film collecting box. The potato exposure rate was 98.6%,the potato injury rate was 2.92% and the collecting rate of residual film was 90.77%. The experiment results meets the design requirements of technical specifications. - DOI:10.3969/j.issn.1000-1565.2022.06.003复杂地形马铃薯收获及残膜回收一体机设计马永龙¹,杨术明¹,李茂强²,王乾¹,柯泽荣¹(1.宁夏大学 机械工程学院,宁夏 银川 750021;2.北方民族大学 机电工程学院,宁夏 银川 750030)摘 要:针对宁夏南部山区复杂地形,设计了复杂地形马铃薯收获及残膜回收一体机,一次作业能够完成马铃薯挖掘和残膜回收.通过样机设计及部件选型,确定挖掘铲、S型土薯抖动升运链及气力式残膜回收机构等关键部件的结构及参数.运用ANSYS Fluent,以收膜机构叶轮的叶片数和叶轮旋转速度为设计参数,对收膜机构内部流场全压云图、速度云图和速度矢量图进行对比分析,确定叶轮的叶片数为16片、叶轮转速为1 120 r/min时,收膜机构的残膜收集效果最佳.田间试验结果表明,该机型土薯分离效果显著,残膜能够连续地被收膜机构吸入并输送至集膜箱,明薯率为98.6%,伤薯率为2.92%,残膜拾挣率90.77%.试验指标均达到国家和行业标准要求.关键词:复杂地形;马铃薯收获;残膜;一体机;收膜机构中图分类号:S225.71 文献标志码:A 文章编号:1000-1565(2022)06-0569-11Design of integrated machine for potato harvestingand residual film collecting in complex terrainMA Yonglong¹, YANG Shuming¹, LI Maoqiang², WANG Qian¹, KE Zerong¹(1.College of Mechanical Engineering, Ningxia University, Yinchuan 750021,China; 2.College of Mechanical and Electrical Engineering, North Minzu University, Yinchuan 750030,China)Abstract: Aiming at the complex terrain of southern Ningxia, a potato harvesting and residual film collecting integrated machine is designed for complex terrain, which can complete potato digging and residual film recovery in one operation. The key components of the prototype were designed and selected to determine the structure and parameters of the digging blade, the S-shaped soil-potato dither conveyor device and the pneumatic residual film recovery mechanism. With ANSYS fluent, using two design parameters, the number of blades of the impeller and the rotation speed of the impeller, the comparison and analysis on the full pressure cloud diagram, velocity cloud diagram and velocity vector diagram of the internal flow field of the residual film collecting mechanism are carried out.When the number of blades of the impeller is 16 and the impeller rotation speed is 1 120r/min, the residual film collecting mechanism has the best effect on collecting residual film. The field experiment results showed that the soil-potato separation effect of this structure is significant. The residual film can be continuously sucked by the residual film collecting mechanism and transported to the residual film collecting box. The potato exposure rate was 98.6%,the potato injury rate was 2.92% and the collecting rate of residual film was 90.77%. The experiment results meets the design requirements of technical specifications. - 收稿日期:2022-04-09 基金项目:宁夏回族自治区重点研发计划重大项目(2019BFF02003) 第一作者:马永龙(1987—),男,宁夏吴忠人,回族,宁夏大学在读硕士研究生.E-mail:18795274127@163.com 通信作者:杨术明(1974—),男,宁夏吴忠人,回族,宁夏大学教授,博士,主要从事农业装备自动化与智能化方向研究.E-mail:shmyang@126.com第6期马永龙等:复杂地形马铃薯收获及残膜回收一体机设计

Key words: complex terrain, potato harvesting, residual film, integrated machine, residual film collecting mechanism