Abstract: A steam turbine includes an outer casing (19) that is provided with a first steam outlet port (54), through which exhaust steam flowing through the entire length of a flow path (21) defined between an inner casing main body (45) and an outer casing main body (51) in a direction along an axis (O1) is discharged to the outside of the outer casing (19), and a second steam outlet port (55), which is provided in the outer casing main body (51) and through which the exhaust steam passing through a portion of the flow path (21) or the exhaust steam not passing through the flow path (21) is discharged to the outside of the outer casing (19); a first valve (28) that adjusts opening of the first steam outlet port (54); and a second valve (32) that adjusts opening of the second steam outlet port (55).

Abstract: A steam turbine includes an outer casing (19) that is provided with a first steam outlet port (54), through which exhaust steam flowing through the entire length of a flow path (21) defined between an inner casing main body (45) and an outer casing main body (51) in a direction along an axis (O1) is discharged to the outside of the outer casing (19), and a second steam outlet port (55), which is provided in the outer casing main body (51) and through which the exhaust steam passing through a portion of the flow path (21) or the exhaust steam not passing through the flow path (21) is discharged to the outside of the outer casing (19); a first valve (28) that adjusts opening of the first steam outlet port (54); and a second valve (32) that adjusts opening of the second steam outlet port (55).

Abstract: In a rotary machine that includes rotating body including a rotating-body main body and a pair of rotor shaft ends fixed to the both outer sides in the shaft direction of the rotating-body main body; a casing accommodating the rotating-body main body and being penetrated by the rotor shaft ends; a bearing rotatably supporting the rotor shaft ends and having a bearing face being provided with lubricant fluid from a lubricant line; and the support part supporting the casing, the support part is cooled through heat exchanging between the lubricant fluid the support part.

Abstract: A steam turbine includes an inner casing which has an inner casing body in which a first main flow path to which steam is to be supplied from an inner introduction port is defined, an outer casing which has an outer casing body which defines a second main flow path between the inner casing body and the outer casing body and an upper discharge port and a lower discharge port which are in the outer casing body and through which exhaust steam is to be discharged, an upper valve and a lower valve configured to adjust a flow rate of the exhaust steam which has been discharged, and a control unit which can independently control the upper valve and the lower valve.

Abstract: A steam turbine cooling unit for a steam turbine includes a coolant steam path provided to penetrate a casing along a superheated steam supply tube to reach a gap; and a coolant steam supplying unit configured to supply coolant steam flowing through the coolant steam path along the superheated steam supply tube to reach the gap, and having: (i) a pressure higher than a pressure of superheated steam to be supplied by the superheated steam supply tube; and (ii) a temperature lower than a temperature of the superheated steam to be supplied by the superheated steam supply tube.

Abstract: A steam turbine is for a combined cycle plant. The combined cycle plant includes a gas turbine; a boiler a heat source of which is a flue gas discharged from the gas turbine; a high-pressure steam turbine that includes a rotor extending along an axial center of rotation of the rotor, a steam passage provided along the extending direction of the rotor between the rotor and a casing for the rotor, and a high-pressure steam supply portion provided to communicate, from outside the casing through the casing, with the steam passage and configured to be supplied with superheated steam, the high-pressure steam turbine being driven by high-pressure steam generated by the boiler; and a low-pressure steam turbine configured to be driven by low-pressure steam generated by the boiler and by the steam that has flowed through the high-pressure steam turbine.

Abstract: A steam turbine (1) includes an inner casing (3) which has an inner casing body (15) in which a first main flow path (11) to which steam is supplied from an inner introduction port (16) is formed, an outer casing (5) which has an outer casing body (20) which forms a second main flow path (120) between the inner casing body (15) and the outer casing body (20) and an upper discharge port (23) and a lower discharge port (24) which are provided in the outer casing body (20) and through which exhaust steam (S2) is discharged, an upper valve (7) and a lower valve (8) which adjust a flow rate of the discharged exhaust steam (S2), and a control unit (9) which can independently control the upper valve (7) and the lower valve (8).

Abstract: A heating step, in which a stainless member is heated to a temperature within or above a heating phase-transformation temperature range (Ar) in which the stainless member is phase-transformed, is executed. A cooling step in which the stainless member heated in the heating step is cooled to a temperature below a cooling phase-transformation temperature range (Mr) in which the stainless member is phase-transformed, is executed. In the cooling step, cooling of the stainless member is suppressed in a control temperature range including the cooling phase-transformation temperature range (Mr).

Abstract: In a rotary machine that includes rotating body including a rotating-body main body and a pair of rotor shaft ends fixed to the both outer sides in the shaft direction of the rotating-body main body; a casing accommodating the rotating-body main body and being penetrated by the rotor shaft ends; a bearing rotatably supporting the rotor shaft ends and having a bearing face being provided with lubricant fluid from a lubricant line; and the support part supporting the casing, the support part is cooled through heat exchanging between the lubricant fluid the support part.

Abstract: A steam turbine cooling unit for a steam turbine includes a coolant steam path provided to penetrate a casing (an outer casing and an inner casing) along a superheated steam supply tube to reach a gap; and a coolant steam supplying unit configured to supply coolant steam flowing through the coolant steam path along the superheated steam supply tube to reach the gap, and having a pressure higher than and a temperature lower than those of superheated steam to be supplied by the superheated steam supply tube. This configuration provides improved cooling efficiency.

Abstract: A steam turbine is for a combined cycle plant. The combined cycle plant includes a gas turbine; a boiler a heat source of which is a flue gas discharged from the gas turbine; a high-pressure steam turbine that includes a rotor extending along an axial center of rotation of the rotor, a steam passage provided along the extending direction of the rotor between the rotor and a casing for the rotor, and a high-pressure steam supply portion provided to communicate, from outside the casing through the casing, with the steam passage and configured to be supplied with superheated steam, the high-pressure steam turbine being driven by high-pressure steam generated by the boiler; and a low-pressure steam turbine configured to be driven by low-pressure steam generated by the boiler and by the steam that has flowed through the high-pressure steam turbine.

Abstract: A method of manufacturing a turbine blade, the method comprising forming a forging by forging stainless steel; heat treating the forging; and cooling the forging after the heat treatment; wherein in the heat treatment and the cooling, a plurality of the forgings are arranged in alignment, and adjacent forgings of the plurality of forgings are disposed so that at least respective portions of portions of the adjacent forgings corresponding to a region from a portion corresponding to a platform of a turbine blade to a center in a longitudinal direction of the turbine blade face each other and warm each other via radiant heat.

Abstract: A steam turbine vane manufacturing method including: a groove processing step for forming a protective part joint surface on a steam turbine vane material that has been subjected to rough processing; a build-up welding step for forming, by build-up welding, a protective part build-up bead on the protective part joint surface; and a processing step for performing processing, by cutting the first steam turbine vane material that has been subjected to rough processing and the protective part build-up bead, to finish the first steam turbine vane material has been subjected to rough processing so that the first steam turbine vane material becomes a second steam turbine vane material that has been subjected to finishing processing. The first steam turbine vane material that has been subjected to rough processing is larger than the second steam turbine vane material that has been subjected to finishing processing.

Abstract: A method for manufacturing a turbine rotor blade wherein warping, bending and twisting of the entire rotor blade, which is provided with an excess thickness portion after a forging step, can be suppressed. In the forging step in a process for manufacturing a rotor blade (23), the forging is hot-forged such that the distance (the excess thickness amount) from the blade surface of the blade section (23) to the surface of the excess thickness section is substantially uniform along the entire periphery of a cross section of the blade section (23) and the excess thickness section (31) perpendicular to the blade length direction, and such that the amount of the excess thickness in the blade length direction, which is the thickness of the excess thickness section (31), gradually increases toward the blade tip from a prescribed position.

Abstract: Provided is a steam valve (1) equipped with: a stop valve (2) capable of stopping/releasing the flow of steam when driven so as to open/close; an governing valve (3) that is provided coaxially in the interior of the stop valve (2), and that controls the flow volume of the steam when driven to open/close in the same direction as the opening/closing of the stop valve (2); and a first guide part (11) that is provided between the stop valve (2) and the governing valve (3) so as to separate the stop valve and the governing valve in the radial direction, and that guides at least the governing valve in the opening/closing direction.

Abstract: A method of manufacturing a turbine blade, the method comprising the steps of forming a forging by forging stainless steel; heat treating the forging; and cooling the forging after the heat treatment; wherein in the heat treatment and the cooling, a plurality of the forgings are arranged in alignment, and adjacent forgings of the plurality of forgings are disposed so that at least respective portions of portions of the adjacent forgings corresponding to a region from a portion corresponding to a platform of a turbine blade to a center in a longitudinal direction of the turbine blade face each other and warm each other via radiant heat.

Abstract: A heating step, in which a stainless member is heated to a temperature within or above a heating phase-transformation temperature range (Ar) in which the stainless member is phase-transformed, is executed. A cooling step in which the stainless member heated in the heating step is cooled to a temperature below a cooling phase-transformation temperature range (Mr) in which the stainless member is phase-transformed, is executed. In the cooling step, cooling of the stainless member is suppressed in a control temperature range including the cooling phase-transformation temperature range (Mr).

Abstract: The present invention addresses the problem of providing a method for manufacturing a turbine rotor blade wherein warping, bending and twisting of the entire rotor blade, which is provided with an excess thickness portion after a forging step, can be suppressed. In the forging step in a process for manufacturing a rotor blade (23), the forging is hot-forged such that the distance (the excess thickness amount) from the blade surface of the blade section (23) to the surface of the excess thickness section is substantially uniform along the entire periphery of a cross section of the blade section (23) and the excess thickness section (31) perpendicular to the blade length direction, and such that the amount of the excess thickness in the blade length direction, which is the thickness of the excess thickness section (31), gradually increases toward the blade tip from a prescribed position.

Abstract: A steam turbine vane manufacturing method including: a groove processing step for forming a protective part connecting surface (14) on a steam turbine vane material (11) that was subjected to rough processing; a build-up welding step for forming, by build-up welding, a protective part build-up bead (15) on the protective part connecting surface (14); and a processing step for performing processing, by cutting the steam turbine vane material (11) that was subjected to rough processing and the protective part build-up bead (15), to finish the steam turbine vane material (11) that was subjected to rough processing so that the same becomes a steam turbine vane material (16) that was subjected to finishing processing. In this case, the steam turbine vane material (11) that was subjected to rough processing is larger than the steam turbine vane material (16) that was subjected to finishing processing.

Abstract: Provided is a steam valve (1) equipped with: a stop valve (2) capable of stopping/releasing the flow of steam when driven so as to open/close; an governing valve (3) that is provided coaxially in the interior of the stop valve (2), and that controls the flow volume of the steam when driven to open/close in the same direction as the opening/closing of the stop valve (2); and a first guide part (11) that is provided between the stop valve (2) and the governing valve (3) so as to separate the stop valve and the governing valve in the radial direction, and that guides at least the governing valve in the opening/closing direction.