Analysis of the Dynamic Friction of a Gas Face Seal Based on Acoustic Emissions
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Acoustic emission (AE) signals produced by the dynamic friction of a gas face seal are analyzed to uncover their information concerning the status of the seal. Experiments were conducted with a gas face seal test rig. By adjusting different operating parameters, friction occurred in different ways and produced discrepant AE signals. The root-mean-square value of AE signals under different operating conditions has varied fluctuations on a timescale of the rotation period, which distinguishes different dynamic friction patterns and furthermore shows the significant discrepancy of how dynamic friction is affected by different operating parameters. Numerical simulations using a dynamic model for a gas face seal with contact coupled were performed. A combination of the experiments and numerical simulations validates the dynamic friction dependence on waviness, which can be reflected by AE signals. This research demonstrates the approach of revealing the real-time friction status of a seal by analyzing AE signals on a timescale of the rotation period.
KeywordsMechanical seals Friction test methods Acoustic emission Real-time monitoring
This work is supported by the National Natural Science Foundation of China (Grant Nos. 51735006 and U1737209) and the National Science and Technology Support Plan Project (Grant No. 2015BAA08B02).
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