FIELD: engines and pumps.
SUBSTANCE: invention relates to an expansion turbines, operating on basis of cryogenic liquid. Turbine comprises turbine wheel (6) mounted on rotary shaft (8), at least one radial inlet (12) for cryogenic liquid to be expanded in expansion turbine, and dry gas sealing means (30) at a position along rotary shaft (8) between turbine wheel (6) and bearings (20 and 22). There is thermal barrier member (70) between turbine wheel (6) and dry gas sealing means (30), gas chamber (76) on dry gas sealing means (30) side of thermal barrier member (70), and inlet (78) for cryogenic gas into said gas chamber (76).
EFFECT: use of invention is aimed at improving operating reliability of gas turbine.
21 cl, 3 dwg
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