The Shaky Turbine

摘要

"George, I need some help." Carlos was calling from South America, where the 225 meter-head Molinos plant, which contains four Francis turbine-generator units, had recently been commissioned. Carlos was operating engineer for the utility that owned the plant. The turbines were encountering a vibration problem between 55% and 65% wicket gate opening that was so severe, the units would occasionally shut down because of excessive shaft shaking.