Assessment of O-ring Seal Performance by Measurement of Acoustic Emission Signals
2011-04-13
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Assessment of O-ring Seal Performance by Measurement of Acoustic Emission Signals
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2011-04-13
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Abstract
O-rings are commonly installed in fluid systems for sealing purpose. There is
ongoing research towards improving O-rings’ sealing performances by using
adaptive elastomeric materials at the Department of Mechanical Engineering at
University of Minnesota. As part of seal development the performance of the seal
has to be assessed. In this research a test stand for measuring leakage was
constructed and leakage measurement was demonstrated as the seal leakage
was measured by Monitoring Acoustic Emission (AE) signals. The test stand was
constructed in which a specified load or a specified displacement can be applied
to an O-ring held between flat plates, high pressure air introduced to the inside of
the seal and AE due to leakage measured. The scope of this research was to try
to quantify leakage rate of in use O-ring as a function of AE signals. The AE
signals were measured as a function of volumetric air flow rate Q, working fluid
pressure P, O-ring counterface force F and seal AE sensor distance d. Results
showed that the Root Mean Square (RMS) values of AE signals increased with Q,
P and F but decrease with d. Results also showed that the frequency spectrums
of AE signals were wideband with multiple peaks at different frequencies. The
physical interpretation of frequency spectrum was discussed but was not fully
explained.
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Additional contributor: Barney Klamecki (faculty mentor)
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The author of this poster gratefully acknowledges the support of NSF Center of Compact and Efficient Fluid Power for generous funding. Special thanks to Department of Mechanical Engineering for supplies and facilities
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Sun, Zhen. (2011). Assessment of O-ring Seal Performance by Measurement of Acoustic Emission Signals. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/104501.
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