Inspection of Cracks in the Piston Rod of a Hydraulic Cylinder Using Injected Alternating Current-Field Measurement

被引:2
|
作者
Zhang, Jikai [1 ]
Huang, Yuewen [1 ]
Tang, Jian [2 ]
Zhou, Fangfang [1 ]
Kang, Yihua [2 ]
Feng, Bo [2 ]
机构
[1] Changjiang River Sci Res Inst, Natl Ctr Dam Safety Engn Technol Res, Wuhan 430010, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
injected alternating current field measurement; nondestructive testing; piston rod; gate hoist; EDDY-CURRENT; METAL PLATES; MAGNETIZATION;
D O I
10.3390/w14172736
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This paper proposes a method of injected alternating current-field measurement (IAC-FM) for detecting orthogonal cracks in the piston rod of a hydraulic cylinder in a gate hoist. Using this method, both longitudinal and transverse cracks can be detected at the same time. An alternating magnetic field is produced inside the steel rod by axially injecting an alternating current into the rod. The longitudinal crack perturbs the circumferential magnetic field, whereas the transverse crack perturbs the current in the axial direction. Analyses of the behaviors of the magnetic field in the vicinity of the cracks were proposed, using a three-dimensional finite element software. An experimental setup was built and validation experiments were performed. The effects of the operating frequency and scan path were also studied. The results verified the feasibility of the IAC-FM method and showed great potential for the inspection of in-service hydraulic cylinders of gate hoists.
引用
收藏
页数:9
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