Monitored using MBVI technology, identified internal rubbing of slide valves on scrolls
The client is one of the world’s largest oil and gas companies, operating a large, geographically distributed gas production facility involving around 100 identical screw compressors, each of 2.5MW rating. Permanently installed MBVI units monitor the system. As the system began to age, wear in the slide valves allowed them to make increasing contact with the rotors. Rubbing friction shows up very clearly as peaks at 1/5 x rotational speed. As the problem develops, this rubbing signal increases very clearly, and was shown in this series of images:
These pictures are from an earlier version of our software system. The new system automatically identifies these rubbing peaks, providing easily available trend plots, and alarming automatically if the level rises above the relevant level.
What to do next
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