A recent book1 describes novel approaches in applied process gas compressor technology. Among its many topics, the book1 highlights not only where compressor rotor instabilities can originate, but also how permanent fixes can be designed in from the start and/or retrofitted after a failure event.
Prior art often includes squeeze film damper bearings (SFDs); their underlying principles resemble the well-known shock absorbers in motor vehicles. Although SFD bearings will often prove successful, reliability-related concerns may exist for the elastomeric O-rings installed in most SFDs. Static O-rings will degrade over time due to the loads imposed by the weight of a rotor assembly. It follows t
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