METHOD OF STEAM FLOW CONTROL IN STEAM TURBINE WITH COUNTER-FLOW CYLINDERS Russian patent published in 1995 - IPC

FIELD: turbo-machines. SUBSTANCE: steam flow control is effected by by-pass of part of steam in one of the cylinders between the high- and low-pressure stages at variation of steam flow rate. By-pass of part of steam between the stages of one of the cylinders is accomplished when the relation of axial forces of cylinder rotors under control exceeds the definite preset value. In this case, if the rate of steam flow through one of the cylinders is decreased, by-pass of part of steam is accomplished between the stages of the other cylinder, and if the rate of steam flow through one of the cylinders is increased, by-pass of part of steam is accomplished in the same cylinder. EFFECT: protection of thrust bearing against overload, simplified realization, and no influence on operating characteristics of steam turbine. 1 dwg