LAST STAGE OF STEAM TURBINE Russian patent published in 2017 - IPC F01D5/28 F01D25/32 F01D9/02 

FIELD: machine engineering.

SUBSTANCE: blades are made with a selection of moisture and steam inlet channels, communicating with through slots selection of moisture and steam inlet. The blades are divided into two groups: one group of blades disposed at the bottom of the diaphragm and the most remote from the connector, included in the nozzle array sector with a central angle of 120º-180º, and another group of the remaining blades. The annular chamber in every part of the rim of the diaphragm seals the inlet chamber is divided into steam and water sampling chamber. By the steam inlet chamber, the steam-receiving box is connected with steam supply pipes, which are installed in the throttle pressure regulators, and the moisture sampling chamber communicates with the holes in the rim, in which the throttling members are mounted. In the body of the diaphragm, the wet-receiving slots are made.

EFFECT: proposed design of the blades of both groups and the presence of various elements dripping can improve efficiency, which increases the efficiency of the stage and the overall efficiency of the steam turbine, reducing the risk of increased wet-steam erosion of rotor blades.

3 cl, 5 dwg