STEAM TURBINE LOW-PRESSURE TWO-ROW CYLINDER TWO-ROW STAGE Russian patent published in 2010 - IPC F01D1/04 F01D5/12 

FIELD: engines and pumps.

SUBSTANCE: turbine machine two-row stage comprises two-row guide vane and two-row wheel consisting of interjointed top- and bottom-row wheels. Peripheral outline of lower row and root outline of upper row of two-row turbine wheel are either cylindrical or shaped with cylindrical sections. Upper row wheel is connected to lower row wheel via split joint. Torque is transmitted from upper row wheel to lower row wheel periphery with the help of splined joint or the like that transmits only torque from upper row vanes to lower row vanes. Torque transmitting joint is arranged on cylindrical parts of shaped peripheral edges of lower row and shaped root outline of upper row, or, in the case of cylindrical root outline of upper row and peripheral outline of lower row, splines are arranged all over the width of said outlines.

EFFECT: reduced load from centrifugal forces acting on top row impeller and possibility of fast replacement.

2 cl, 7 dwg