Presentation Information
[9a-E202-2]Detection of Subtle Sliding Condition Changes of Mechanical Seals Using High-Frequency Acoustic Emission
〇Yuko Hanaoka1, Hajime Koyanagi1, Hiroyuki Okino1, Kenij Otsu1 (1.Hitachi R&D Group)
Keywords:
Acoustic emission (AE) measurement,Sliding condition,Detection of subtle changes
Acoustic emission (AE) measurement is a non-destructive technique that detects elastic waves generated by mechanical phenomena such as friction and wear. In mechanical seals, gradual changes in sliding conditions can lead to degradation and failure, requiring early detection.
This study investigates the feasibility of detecting subtle sliding condition changes under practical operating conditions using AE measurement. Sliding tests were conducted with reduced load (approximately one-twentieth of previous conditions), including fluid lubrication regimes and contamination conditions. AE signals were evaluated using RMS values and frequency characteristics in comparison with test conditions.
Results showed that AE responses were detectable even under low-load, non-failure conditions, and their variations corresponded to changes in operating conditions. These results suggest that AE measurement can be used to monitor subtle changes in sliding states during normal operation.
This study investigates the feasibility of detecting subtle sliding condition changes under practical operating conditions using AE measurement. Sliding tests were conducted with reduced load (approximately one-twentieth of previous conditions), including fluid lubrication regimes and contamination conditions. AE signals were evaluated using RMS values and frequency characteristics in comparison with test conditions.
Results showed that AE responses were detectable even under low-load, non-failure conditions, and their variations corresponded to changes in operating conditions. These results suggest that AE measurement can be used to monitor subtle changes in sliding states during normal operation.