By Hakan Hedlund
This webinar covers condition monitoring of Rotary Screw Compressors designed for air compression. In an historical perspective, measuring the operating condition of rotary compressors has been quite difficult. The following challenges are likely to be experienced when implementing condition monitoring on these kinds of machines:
•Many rotating parts with different RPM:s in the same machine makes it difficult to identify the origins of the measured signal and keep track of the signals of interest.
•Signals from rotating part is “interfered” by the signals generated from the compression of the air
•Fast variation of RPM during data acquisition can occur. Due to resonances, measured signals may not be” linear” to RPM variations
•Load variation during measurements is common
•It can be difficult to attach a transducer in in a suitable way for picking up high frequency signals.
•Frequency controlled motors can generate a wide variety of signal patterns that can be challenging to interpret.
However, the HD condition monitoring technologies and associated functions and features makes it easier to get a good grip on the condition of each component of a rotary screw compressor.