AXIAL-FLOW TURBINE STAGE AND MULTI-STAGE TURBINE Russian patent published in 2005 - IPC

FIELD: power engineering.

SUBSTANCE: multi-stage turbine and axial-flow turbine stage comprise working wheels that rotate in the opposite directions, are arranged on individual shafts, and have blade cascades on the intermediate diameter, which terns the fluid flow at the angle Δβ_CA = 180° - (β_1I + β_2EFF), where β_1I is the blade cascade inlet angle, β_2EFF is the effective angle of the blade cascade output. The blade cascade of the first upstream working wheel turns the fluid not more than by 15°. Between the wheels, power is transmitted via a reduction gear. Between the shafts and the common shaft, power is transmitted through a conical reduction gear.

EFFECT: reduced losses.

4 cl, 12 dwg