STEAM TURBINE AND METHOD OF ITS OPERATION Russian patent published in 2009 - IPC F01D3/04 

FIELD: engines and pumps.

SUBSTANCE: invention relates to steam turbine and to method of its operation. The turbine comprises and outer and inner casings, each with a live steam feed channel. The turbine incorporates a rotor with the thrust compensation piston, the rotor comprising multiple vanes and being arranged inside the aforesaid inner casing to run therein. Note the said inner casing incorporates multiple guide vanes arranged to form, along the flow direction, a flow passage with several vane stages, each comprising a row of operating vanes and a row of guide vanes. Note also that the inner casing has a return channel representing a connection pipe arranged in the space between the inner and outer casings and the said flow passage downstream of the vane stage, and that the inner channel incorporates a feed channel representing a connection pipe in the space between the inner and outer casings and the thrust compensation piston rod end.

EFFECT: higher efficiency of steam turbine cooling in wide temperature range.

16 cl, 2 dwg