Drum rotor for an impulse steam turbine having blades mounted in longitudinal grooves, and an impulse steam turbine including such a motor
AssigneeGEC Alsthom SA
InventorsJean-Pierre Gros, Guillaume Verschaeve
Life of this patent
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Abstract
A drum rotor for an impulse steam turbine having moving wheels constituted by rotor blades whose roots are provided with dovetails are locked in dovetail shaped grooves formed in the rotor. The grooves are longitudinal over at least a portion of the rotor. The roots of the blades of a moving wheel are separated from the roots of the blades of an adjacent moving wheel by dovetail shaped spacers. An optimum filling of the longitudinal grooves is effected for better interconnection of the caps of the rotor blades.
Claims6
A drum rotor for an impulse steam turbine having moving wheels constituted by rotor blades having roots provided with dovetails, said dovetails being locked in dovetail shaped grooves formed in said rotor, and wherein the dovetail shaped grooves extend longitudinally over at least a portion of the rotor parallel to the rotor axis, wherein the dovetail roots of the rotor blades of a moving wheel are separated from the roots of the blades of an adjacent moving wheel by dovetail shaped spacers, and wherein said dovetail shaped grooves are exactly complementary to said dovetail shaped roots, and said dovetail shaped spacers and adjacent roots separated by a spacer are lodged with said spacers inside the same dovetail shaped longitudinal groove.
Dependencies are inferred from the claim text.