Einrichtung zur Sicherung gegen Überdrehzahl bei Kraftmaschinen, insbesondere Turbinen

摘要

In a pneumatic overspeed protective system for rotating apparatus an air nozzle and a rotating device, responsive to speed variations, cooperate to function as a pneumatic amplifier with high gain, that is a small change in position produces a large change in pressure. When the rotating device is displaced in a radial direction by centrifugal force, a rapid drop in the output signal pressure from the amplifier causes a fluid pressure actuated valve to shut off the energy supply to the rotating apparatus.