Patent ID: 7484924
Filing Date: 2009-02-03
Classification: F01D,F05D,Y02T

Abstract:
1. A device for limiting overspeed of a turbine in a turbomachine, the turbine comprising: a rotor formed from disks mounted on a turbine shaft and carrying moving blades, stages of fixed vanes disposed between the disks of the rotor, and means of destruction of the blades of the disks of the rotor in case of a fracture of the turbine shaft, wherein the means of destruction are fixed and carried by a stage of fixed vanes situated between an upstream disk of the rotor and a following disk of the rotor and are provided at a radially inner end of the fixed vanes in order to shear the blades of the upstream disk of the rotor at the start of a downstream displacement of the rotor resulting from the fracture of the turbine shaft.