FIELD: thermal engineering. SUBSTANCE: steam turbine has multistage rotor with disks provided with rotor blades and diaphragms installed between disks and provided with nozzles on rim, central bores, and shaped slots. The latter accommodate segments with ridges of labyrinth seals entering slots on rotor shaft. Diaphragms have ducts through which nozzles communicate with central bores; slots are also made on inlet ends of segments under duct bores in diaphragms communicating with nozzles. EFFECT: reduced steam leakage through labyrinth seals; improved economic efficiency of turbine. 4 dwg
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