Turbine shaft axial load protection system

Details Turbine shaft axial load protection system Turbine shaft axial load protection system

F - Mech Eng,Light,Heat,Weapons

01

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170/59

F01D 21/00 (2006.01) F01D 3/00 (2006.01)

Patent

CA 1297798

12 54,379 ABSTRACT OF THE DISCLOSURE An axial thrust limiting system for a steam turbine including a rotor having a shaft, the turbine containing a plurality of chambers each defining a pressure zone containing a fluid which, during operation of the turbine, is t a pressure which influences the axial thrust load on the shaft, the turbine being constructed such that at least during rapid shut down a pressure differential can develop between two of the chambers to create an excessive axial thrust load on the shaft. The axial thrust limiting system includes controllable valves connected in a fluid flow path between the two chambers, and valve operating components connected for operating the valves during rapid shut down of the turbine in order to reduce the pressure differential between the two chambers.

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