摘要
某型液压电磁阀内部推杆发生断裂,导致液压电磁阀出现故障。根据推杆故障件断裂位置,人工制作对比件,比较故障件、对比件的断口特征,表明二者断口形貌和金相组织基本一致,推杆材料组织与推杆断裂无直接关系,但二者芯部厚度尺寸偏差较大。采用ANSYS Workbench对不同芯部厚度的推杆在实际工况下的应力分布进行仿真分析,表明当芯部厚度逐渐增大时,推杆中的最大等效应力逐渐减小;当芯部厚度小于0.25 mm时,推杆的材料安全系数无法满足工程应用要求。通过对比试验,证实了推杆芯部厚度尺寸偏小确实是导致推杆断裂、引发液压电磁阀故障的根本原因,并提出了改进措施。
The internal push rod in a hydraulic solenoid valve breaks,resulting in the failure of the hydraulic solenoid valve.According to the fracture position of a failure part,a comparison part is made manually,and the comparison between their fracture features is carried out.The results show that the fracture morphology and the metallographic structure of the two are basically the same,so the material structure has no direct relationship with the fracture of the push rod,but the core thickness deviation of the two are too large.ANSYS Workbench is used to carry out simulation analysis on the stress distribution of the push rods with different core thicknesses under the actual working condition,which shows that when the core thickness increases gradually,the maximum equivalent stress in the push rod decreases gradually;when the core thickness is less than 0.25 mm,the material safety factor of the push rod cannot meet the engineering application requirements.Through the comparative test,it is confirmed that the small core thickness of the push rod is just the root cause of its fracture as well as the failure of the solenoid hydraulic valve,and the countermeasures are put forward.
作者
皮月亮
吕焱明
李永彬
周骋
PI Yue-liang;LV Yan-ming;LI Yong-bin;ZHOU Cheng(State-Owned Machinery Factory in Wuhu,Wuhu 241007,China)
出处
《工业技术创新》
2020年第2期17-22,共6页
Industrial Technology Innovation
关键词
推杆断裂
断口形貌
芯部厚度
仿真分析
安全系数
Push Rod fracture
Fracture Morphology
Core Thickness
Simulation Analysis
Safety Factor
