摘要
为解决当前农业机械推土机工作装置关节摩擦副受力过大、挤压磨损严重影响作业效率问题,以某企业生产的24 t推土机铲斗与斗杆铰接处关节为研究对象,利用虚拟样机技术模拟工作装置在偏载冲击工况下关节动态受力变化;采用ABAQUS对关节处强度进行分析,通过实验测试在扫描电镜下观察表面磨损,探寻磨损机制。结果表明:关节处受偏载冲击强度较大,应力值分布不均匀;磨损表面产生凹坑和犁沟等;磨损形式主要为疲劳磨损与磨粒磨损。此研究对推土机及其他工程机械装置关节摩擦副优化具有一定的指导作用。
This study aims at investigating the problems of excessive force and severe extrusion wear on the joint friction pair of the working device of agricultural machinery bulldozer.The joint of the 24 t bulldozer bucket and bucket rod produced by an enterprise taken as the research object,the virtual prototype technology was used to simulate the dynamic force change of the working device under the condition of partial load impact,the strength of the joint was analyzed by the ABAQUS,and the surface wear was observed under the scanning electron microscope through the experimental test to explore the wear mechanism.The results show that the impact strength of the joint is strong and the distribution of the contact stress is uneven.Pits and furrows are formed on the worn surface,and the wear forms are mainly fatigue wear and abrasive wear.This study has a certain guiding role in the optimization of joint friction pairs of bulldozer and other engineering mechanical devices.
作者
郭文彬
李恒宾
GUO Wenbin;LI Hengbin(College of Transportation Engineering,Qinghai Vocational and Technical University,Xining 810003,China)
出处
《机械制造与自动化》
2025年第4期77-82,共6页
Machine Building & Automation
基金
第二批国家级职业教育教师创新团队专业领域课题研究项目(YB2021090201)。
关键词
推土机
关节摩擦副
偏载冲击
强度
磨损机制
bulldozer
joint friction pair
off-load impact
strength
wear mechanism
