Turbine overspeed limiting device for e.g. aircraft jet engine, has explosive charge mounted on casing of turbine and controlled by detecting unit that detect that turbine is experiencing overspeed or that turbine shaft has broken

摘要

The device (40) has a shearing unit for shearing bearing blades (22) of stages (30) of a turbine. The shearing unit includes a cylinder for propelling a pin (42) into a path of the blades. An explosive charge is mounted on an exhaust casing (34) of the turbine or of the turbo-machine and controlled by a detecting unit that detect that the turbine is experiencing overspeed or that a turbine shaft (24) has broken. The cylinder is mounted on an outside of the casing in a line with an orifice of the casing that opens onto the path of the blades.