摘要:
A steam turbine (10) is provided with a double-structure comprising an inner casing (20) and an outer casing (21). A turbine rotor (22), in which plural stages of moving blades (24) are circumferentially implanted, is operatively disposed in inner casing (20). A diaphragm outer ring (25) and a diaphragm inner ring are disposed along the circumferential direction in inner casing (20). Stationary blades (27) are circumferentially provided between diaphragm outer ring (25) and the diaphragm inner ring, so that diaphragm outer ring (25), the diaphragm inner ring and stationary blades (27) form a stage of stationary blades. The stages of the stationary blades are arranged alternately with the stages of moving blades (24) in the axial direction of turbine rotor (22). A cooling medium passage (40) for passing a cooling medium CM which is supplied through a supply pipe (45) is formed between inner casing (20) and diaphragm outer ring (25).
摘要:
A steam turbine includes a casing, a rotor arranged inside the casing so as to extend in an axial direction of the casing, a rotor disk integrally formed with the rotor, a rotor-side implanting portion formed in the rotor disk, a plurality of moving blades arranged on the rotor disk in a circumferential direction of the rotor, and a moving blade-side implanting portion formed in the moving blade, in which the moving blade-side implanting portions of the moving blades are engaged with the rotor-side implanting portions, respectively. A cooling medium flows through a gap formed at least on a blade portion side of the moving blade among gaps formed between the moving blade-side implanting portions and the rotor-side implanting portions.
摘要:
A steam turbine (10) is provided with a double-structure comprising an inner casing (20) and an outer casing (21). A turbine rotor (22), in which plural stages of moving blades (24) are circumferentially implanted, is operatively disposed in inner casing (20). A diaphragm outer ring (25) and a diaphragm inner ring are disposed along the circumferential direction in inner casing (20). Stationary blades (27) are circumferentially provided between diaphragm outer ring (25) and the diaphragm inner ring, so that diaphragm outer ring (25), the diaphragm inner ring and stationary blades (27) form a stage of stationary blades. The stages of the stationary blades are arranged alternately with the stages of moving blades (24) in the axial direction of turbine rotor (22). A cooling medium passage (40) for passing a cooling medium CM which is supplied through a supply pipe (45) is formed between inner casing (20) and diaphragm outer ring (25).
摘要:
A steam turbine (10) is comprised of a double-structured casing configured of an outer casing (21) and an inner casing (20), a turbine rotor (23) disposed through the inner casing and having a plurality of stages of moving blades (22) implanted, and a plurality of stages of stationary blades (25) disposed alternately with the moving blades (22) in the axial direction of the turbine rotor (23) in the inner casing (20). The steam turbine (10) is further provided with a discharge passage (30) which externally guides steam, which has flown in the inner casing and passed the final stage moving blades while performing expansion work, directly from the inner casing interior.
摘要:
A turbine rotor 300 includes: a high-temperature turbine rotor constituent part 301 where high-temperature steam passes; low-temperature turbine rotor constituent parts 302 sandwiching and weld-connected to the high-temperature turbine rotor constituent part 301 and made of a material different from a material of the high-temperature turbine rotor constituent part 301; and a cooling part cooling the high-temperature turbine rotor constituent part 301 by ejecting cooling steam 240 to a position, of the high-temperature turbine rotor constituent part 301, near a welded portion 120 between the high-temperature turbine rotor constituent part 301 and the low-temperature turbine rotor constituent part 302. A value equal to a distance divided by a diameter is equal to or more than 0.3, where the distance is a distance from the position, of the high-temperature turbine rotor constituent part 301, ejected the cooling steam 240 up to the welded portion 120, and the diameter is a turbine rotor diameter of the high-temperature turbine rotor constituent part 301.
摘要:
A turbine rotor 300 includes: a high-temperature turbine rotor constituent part 301 where high-temperature steam passes; low-temperature turbine rotor constituent parts 302 sandwiching and weld-connected to the high-temperature turbine rotor constituent part 301 and made of a material different from a material of the high-temperature turbine rotor constituent part 301; and a cooling part cooling the high-temperature turbine rotor constituent part 301 by ejecting cooling steam 240 to a position, of the high-temperature turbine rotor constituent part 301, near a welded portion 120 between the high-temperature turbine rotor constituent part 301 and the low-temperature turbine rotor constituent part 302. A value equal to a distance divided by a diameter is equal to or more than 0.3, where the distance is a distance from the position, of the high-temperature turbine rotor constituent part 301, ejected the cooling steam 240 up to the welded portion 120, and the diameter is a turbine rotor diameter of the high-temperature turbine rotor constituent part 301.
摘要:
A steam turbine 10 of an embodiment has seal rings 60 between an inlet sleeve 40 for introducing steam and an inner casing 20 and an outer casing 21 into which the inlet sleeve 40 is inserted. The seal rings 60 have high-temperature side seal rings 70 which are disposed their inner circumferences contacted to the outer circumference of the inlet sleeve 40, and low-temperature side seal rings 80 which are formed to have inner and outer diameters larger than those of the high-temperature side seal rings 70 and disposed with their outer circumferences contacted to the inner casing 20 or the outer casing 21. A thermal barrier layer 90 is disposed between the inner circumferences of the high-temperature side seal rings 70 and the outer circumference of the inlet sleeve 40 and between the high-temperature side seal rings 70 and the low-temperature side seal rings 80.