In-service fan bearing tooth groove edge crack detection system and method based on eddy current detection

• Main Authors: LI JIAOJIAO, YIN ZUN, GAO LEI, GAO YANZHONG, LIN LIN, SUN PUJIE, ZHU TING, HOU ZHAOTANG, LYU YOU, MENG YONGLE, LYU YINAN
• Format: Patent
• Language: Chinese; English
• Published: 24.06.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses an eddy current detection-based in-service fan bearing tooth groove edge crack detection system and method. The eddy current detection-based in-service fan bearing tooth groove edge crack detection system comprises an eddy current detector, a reference block and an eddy current probe, a plurality of gear teeth are arranged on the reference block, a tooth groove is formed between every two adjacent gear teeth, and a first rectangular wire groove and a second rectangular wire groove are formed in each tooth groove; the eddy current probe comprises a detection module and two eddy current coils, each eddy current coil comprises two excitation coils and one detection coil, the detection module is a convex surface matched with the tooth groove, the detection coil is located between the two excitation coils, magnetic sheets are arranged on the upper end faces of the two eddy current coils, and the two eddy current coils are symmetrically arranged on the two sides of the detection module. Acco