全自动红薯杀秧机的设计与试验——基于Design-Expert8.0.6

Design Optimization and Experiment of Fully Automatic Sweet Potato Seedling Killer——Based on Design-Expert8.0.6

红薯收获前的杀秧作业不仅可以提高收获效率,还能够提升红薯的品质。然而,目前我国所使用的各种红薯杀秧机普遍存在着带薯率高、打碎长度合格率差、土壤在护罩上黏着严重的问题,严重影响了红薯的产量与品质。为此,以现有的红薯杀秧机技术为基础,进行创新研发,解决以上几种问题。主要介绍了新型红薯杀秧机的各关键部位的设计,并通过机具作业速度、甩刀刀辊转速、垄上刀距垄台高度3种因素对新型红薯杀秧机的工作效果进行试验。结果表明:新型红薯杀秧机可以有效降低土壤黏着问题,当作业速度为4.5~6.0km/h、甩刀刀辊转速为1500~1600r/min、垄上刀距垄台高度为50~52mm时,实际打碎长度合格率在94.7%~95.5%之间,留茬高度在56.0~59.9mm之间,带薯率降低至0.15%~0.23%,符合红薯杀秧机的实际作业要求。

Seedling killing before sweet potato harvest can effectively improve the quality and harvest efficiency of sweet potato. However, the common problems at present stage are that the existing sweet potato seedling killer has the problems of high potato carrying rate, poor qualified rate of broken length and serious adhesion of soil on the cover. Therefore, based on the existing technology of sweet potato seedling killer, a new type of sweet potato seedling killer is designed. This paper mainly introduces the structural design emphasis of its key components, and analyses the possible influence of the arrangement of throwing knives on the seedling killing performance. The operating speed of the machine, the rotational speed of the throwing knife roll and the height of the knife distance between the ridge and the ridge were taken as the test factors. The test results were analyzed by judging the qualified rate of the breaking length, the stubble height and the potato rate. According to the test results, it can be concluded that the long hole structure of shield can effectively reduce soil adhesion;when the machine operation speed is maintained at 4.5-6.0 km/h, the rotary speed of throwing knife roll is controlled at 1500-1600 r/min, the knife distance on ridge is 50-52 mm, the qualified rate of breaking length is in the range of 94.7%-95.5%, the stubble height is 56.0-59.9 mm, and the percentage of potato with stubble is reduced. As low as 0.15%~0.23%. In summary, the seedling killing effect of the seedling killer is better, which can meet the quality requirements of the potato seedling killer and the operation of the machine is stable.