农机化研究2025，Vol.47Issue(11)：11-18,8.DOI:10.13427/j.issn.1003-188X.2025.11.002
胡萝卜缨果拉拽式分离机构的优化与试验
Optimization and Experiment of Carrot Root-stem Pulling Separation Mechanism
摘要
Abstract
Carrots are prone to impact damage during the root-stem separation stage,and it is easy to cause fruit damage due to the impact between the pull rod and the carrot.To reduce the damage of carrots harvested by pulling,the finite el-ement method was used to study the critical velocity of carrot damage after the improvement of the pull rod(a rubber cushioning material with thickness of 2 mm,and inner diameter of 16mm,giving 20 mm outside diameter,and elastic modulus of 100 MPa was wrapped outside the pull rod).The critical rotational speed of the disc driving the pull rods was solved by kinematic analysis of the pulling separation mechanism and impact velocity analysis of carrots.According to the nonuniform motion characteristics of the pull rod,a noncircular gear transmission device was designed,and a root-stem separation experiment was carried out.Because rubber cushioning material affected the success rate of separation and ac-tive disc rotational speed affected the damage rate of separation,the experimental factors were pull rod surface with or without rubber cushioning material and active disc rotational speed.Through the separation experiment,it was found that when the rubber cushioning material was used in the pull rod,and the conveyor belt velocity was 1 m/s and the input ro-tational speed of the disc driving the pull rods was 180 r/min,the separation success rate of carrot was 90%and the damage rate was 5%.关键词
胡萝卜/缨果分离/碰撞损伤/优化设计/运动学分析Key words
carrot/root-stem separation/impact damage/optimal design/kinematic analysis分类
农业科技引用本文复制引用
夏旭东,马卫民,徐瞻泓,陈建能..胡萝卜缨果拉拽式分离机构的优化与试验[J].农机化研究,2025,47(11):11-18,8.基金项目
"十四五"国家重点研发计划项目(2021YFD2000702-2) （2021YFD2000702-2）
国家自然科学基金项目(51805487) （51805487）
