STEAM TURBINE AND METHOD OF MOISTURE REMOVAL FROM FLOW PATH IN STEAM TURBINE Russian patent published in 2013 - IPC F01D9/02 F01D5/28 F01D25/32 

FIELD: power engineering.

SUBSTANCE: steam turbine comprises a diaphragm consisting of an inner ring, an outer ring and airfoils stretching between them. The airfoil comprises at least one channel of moisture removal, stretching along a part of the airfoil length and having at least one inlet hole, which communicates by the flow with the steam path passing through a row of airfoils and between adjacent airfoils, and at least one channel of inlet, stretching along a part of the length of the airfoil along the axis downstream at least one channel of the moisture removal channel and comprising at least one outlet hole for inlet of steam into the steam path. In the outer ring of the diaphragm there is an outer cavity, which represents a cavity for separation of steam/moisture. Steam and moisture removed via a channel of moisture removal arrive into the cavity. The cavity communicates along the flow with the channel of steam inlet for repeated inlet of steam separated in the cavity, into the steam path.

EFFECT: problem of moisture removal is solved, which reduces risk of erosion, using the invention makes it possible to avoid reduction of efficiency taking place as a result of leakage or removal of steam from a flow path because of its ingress.

8 cl, 11 dwg