Resonant vibrations in vertical pumps

摘要

Variable speed driven motors for vertical pumps are known to exhibit operating zones that are subject to excessive vibration. In part one of this paper, Bill of Weir Floway Pumps discusses the influence of excessive resonance and how it can be managed. In part two, he discusses the caution required when starting and stopping VFDs or Soft Start/Stop Driven vertical turbine pumps.