Steam turbine wheel antirotation means

Details Steam turbine wheel antirotation means Steam turbine wheel antirotation means

1983-11-25

1985-02-05

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Multiple axially spaced working members

416201R, F01D 506

Patent

active

044976127

ABSTRACT:
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 incudes 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.

REFERENCES:
patent: 1593393 (1926-07-01), Doran
patent: 1873956 (1932-08-01), Dahlstrand
patent: 3715176 (1973-02-01), Kerklo
patent: 4029437 (1977-06-01), Aubry et al.
patent: 4330236 (1982-05-01), Le Breton

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