TURBINE EQUIPPED WITH SEALING DEVICE BETWEEN CARTRIDGE OF GUIDE VANES AND CASING Russian patent published in 2016 - IPC F01D11/00 F01D25/24 F02C7/28 

FIELD: machine building.

SUBSTANCE: turbine (1) of power plant, preferably steam turbine, includes a stator (2), a rotor (3), and at least one sealing device (12). The stator (2) has the casing (4), and in the casing at least one cartridge (5, 6, 7) of guide vanes with guide vanes (8). The rotor (3) has a rotor shaft (9) with work blades (11). The sealing device (12) seals each cartridge (5, 6, 7) of the guide vanes in axial direction relatively to the casing (4), and separates from each other two areas (20, 21) with different pressure. The sealing device (12) has passing in circumferential direction and acting in axial direction main O-ring (24), looking towards the area (21) with lower pressure, and passing in circumferential direction and acting in axial direction additional O-ring (25) looking towards area (20) with higher pressure. The main O-ring is installed on the cartridge of the guide vanes without movement in axial direction, and the additional O-ring is installed with possibility of movement in axial direction. The additional O-ring is tensioned by the spring element in axial direction towards the area with higher pressure.

EFFECT: improved sealing, and reduced leaks.

10 cl, 3 dwg