Rotary Compressor Monitoring Using Frequency Analysis Technique

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Pornchai Nivesrangsan


This study was demonstrated condition monitoring of typical domestic rotary compressor with various simulated conditions e.g. normal, blade fault, discharge valve fault and intake port fault. The developed technique was also used to identify mechanical and fluid flow activities in the compression cycle of a rotary compressor. Vibration signals based on crank angle domain could be used to describe compression cycle easier than signals on time domain. Frequency analysis based on power spectral density was able to use to demonstrate various activities in compression cycle and also identify various rotary compressor conditions.


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