TOPIC:
Solutions to Screw Compressor Package Vibrations
PRESENTERS:
Wally Bratek, P.Eng. - Principal Consultant at Wood in Vibration, Dynamics, and Noise
DESCRIPTION:
Screw compressors are used in industrial applications requiring large volumes of gas at high compression ratios. This rotary-type positive-displacement machine results in a steadier flow compared to reciprocating compressors, however, risks of high-frequency vibration and fatigue failure due to the compression process remain and can be challenging to solve.
This lecture presents a case study involving three oil-flood screw compressor packages in propane service. High vibration on the packages led to excessive noise and failures on small-bore connections. The case study describes the initial measurements of vibration and pulsation, multi-channel shell-mode vibration measurements of the discharge separator vessels and computer simulations of the pulsation and mechanical systems. The data demonstrates how compressor Volume Index (VI) and slide valve position influence pulsation and resonances and quantifies the effects of constrained-layer damping to reduce mechanical vibration. Optimized solutions to reduce the pulsation and vibration will be presented, including field data of the initial and modified systems.
Purchasers and operators of screw compressors can apply the recommendations presented in this case study to minimize the risk of vibration-related failures on screw compressor packages. Relevant API and industry guidelines will also be discussed.
SCHEDULE:
5:00PM: Cocktails & Mingle
5:30 PM: Presentation start (45min-1hr)
6:15 PM: Presentation concludes; food served
8:00 PM: End of event
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