Steam turbine wheel antirotation means

Details Steam turbine wheel antirotation means Steam turbine wheel antirotation means

F - Mech Eng,Light,Heat,Weapons

01

D

170/78

F01D 5/00 (2006.01) F01D 5/02 (2006.01)

Patent

CA 1209052

STEAM TURBINE WHEEL ANTIROTATION MEANS ABSTRACT OF THE DISCLOSURE A steam turbine rotor includes a plurality of turbine wheels secured to a shaft by an interference shrink fit between each wheel and a corresponding step surface on the shaft. The step surfaces have decreasing radii over a portion of the axial length of the shaft. Each wheel includes a hub section proximate the shaft and each hub section has a shoulder portion of greater radial dimension than the radially innermost surface of the hub section. A member or finger protrudes from one shoulder and mates with a longitudinal slot on one of the step surfaces of the shaft. Relief grooves are also provided for on the shaft and hub section.

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