FIELD: heat-power engineering. SUBSTANCE: steam turbine plant has steam generator, turbine with high-pressure cylinder 3 and mean-pressure cylinder 4, supply of steam for cooling the thermally stressed units of high-pressure cylinder 3 and steam-to-steam heat exchanger 5. Heating medium supply line 6 is used to connect heat exchanger 5 with live steam line 2 and heating medium discharge line 7 is used to connect this heat exchanger with line supplying the steam for cooling the rotor of high-pressure cylinder 3. Cooling medium supply line 3 is used to connect steam-to-steam heat exchanger 5 to one of taps 14 of high-pressure cylinder and cooling medium discharge line 15 is used to connect heat exchanger to line supplying steam for cooling the thermally stressed units of mean-pressure cylinder. Cooling members of thermally stressed units of high- and mean- pressure cylinders are just chambers 8, 16 and 18 made in stators and rotors of these cylinders. EFFECT: enhanced reliability. 1 dwg
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