FIELD: mechanical engineering.
SUBSTANCE: steam turbine (200) has multiple expansion stages (261, 262, 271) and stator vanes (221, 222, 231) in front of at least one of the expansion stages (261, 262, 271); during operation of the steam turbine (200), in order to adjust the flow of steam inside the steam turbine (200) and reach maximum efficiency, the turbines control the angular positions of the stator vanes (221, 222, 231), using, e.g., an external control unit by means of, e.g., a control rod (289, 299).
EFFECT: above solution leads to much higher efficiency outside of the design working conditions of the turbine, due to the possibility of preventing energy dissipation due to the use of either throttling or partial arcing; in particular, the efficiency of the steam turbine remains close to the design level even outside of the design working conditions.
15 cl, 11 dwg
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