An exhaust chamber is equipped with: a diffuser that forms a diffuser space; an exhaust casing that forms an exhaust space communicating with the diffuser space; and an auxiliary exhaust frame that forms an auxiliary exhaust space having an annular shape centered around an axis, on the inside of the diffuser in the radial direction. The auxiliary exhaust frame has an opening that opens toward the outside in the radial direction from the interior of the auxiliary exhaust space, and that enables the exhaust space and the auxiliary exhaust space to communicate with each other.

A rotating machine includes a casing having a hollow shape; a rotator rotatably supported in the casing; a stator blade fixed to an inner peripheral portion of the casing; a rotor blade fixed to an outer peripheral portion of the rotator while being displaced from the stator blade in an axial direction of the rotator; a sealing device disposed between the inner peripheral portion of the casing and a tip of the rotor blade; a swirling flow generation chamber provided along a circumferential direction of the rotator on a downstream side of the sealing device in the casing in a fluid flow direction; and guiding members provided at predetermined intervals in the swirling flow generation chamber in the circumferential direction of the rotator. The guiding members each include a first guiding surface that is inclined in the circumferential direction with respect to the axial direction of the rotator.

The valve device includes: a valve casing that includes a valve casing main body, in which an inlet flow path, an intermediate flow path, and an outlet flow path are formed, and a lid portion that closes an external opening portion formed in the valve casing main body; an intermediate valve seat portion that is detachable from the valve casing main body; a strainer that extends in a direction connecting the lid portion and the intermediate valve seat portion and is disposed between the lid portion and the intermediate valve seat portion; and an energizing member that is disposed between the strainer and the intermediate valve seat portion and is energized the intermediate valve seat portion toward the valve casing main body. The strainer is disposed with the energizing member pressed toward the valve casing main body.

A turbine casing has a front casing segment around a turbine longitudinal axis with first and second front casing part-segments, and a rear casing segment, around the longitudinal axis with first and second rear casing part-segments. The rear casing segment is downstream of the front casing segment in the direction of flow and fastened to the front casing segment via a rear vertical flange of the rear casing segment and a front vertical flange of the front casing segment, forming a cross-shaped joint. A protrusion surrounding the longitudinal axis is formed on the front casing segment in a region of the front vertical flange and extends parallel to the longitudinal axis and protrudes from the front vertical flange in the flow direction. A circumferential seal device is on an outer side, facing away from the longitudinal axis, of the protrusion, and seals the protrusion against the rear casing segment.

A steam turbine facility includes a rotor shaft, a pair of radial bearings for rotatably supporting the rotor shaft, a pair of low-pressure turbine blade rows disposed on the rotor shaft in a bearing span of the pair of radial bearings, and a high-pressure turbine blade row and an intermediate-pressure turbine blade row disposed on the rotor shaft in the bearing span and positioned between the pair of low-pressure turbine blade rows.

The steam valve driving apparatus according to an embodiment is a steam valve driving apparatus regulating open and close position of a valve body. The steam valve driving apparatus includes: a plurality of hydraulic cylinders that presses the valve body in an opening direction. Each of the hydraulic cylinders includes: a piston rod extending outward from a piston in the opening direction; and an open-side cylinder chamber arranged in the opposite side of the piston with respect to the piston and to which hydraulic oil is supplied. The hydraulic cylinder is disposed on a side opposite to the valve body with respect to a closing spring pressing the valve body in a closing direction.

The present invention provides a method for producing a steam turbine member that is highly superior in smoothness. The present invention provides a method for producing a steam turbine member including a cladding layer forming step of forming a cladding layer from a powdered material containing a metal in a region of a base material in which corrosion easily occurs, and a surface heating step of heat-melting a surface of the cladding layer.

An emergency shut-off device shuts off supply of control oil to a trip-and-throttle valve of a steam turbine and closes the trip-and-throttle valve in an emergency. The emergency shut-off device includes: a cylinder; a piston that slides into the cylinder; a spring that applies a biasing force to the piston; a plurality of piston valves disposed on the piston; and a plurality of chambers that are formed by the piston valves. The control oil is supplied to and drained from the plurality of chambers, and a sliding surface of each of the piston valves has a groove to leak the control oil in a corresponding one of the chambers to another one of the chambers that is adjacent to the corresponding chamber in an axis direction.

A steam turbine, having a steam turbine outer housing; a high-pressure inner housing having first process steam inlet and outlet sections for conducting process steam therethrough from the inlet to the outlet section in a first process steam expansion direction; a low-pressure inner housing having second process steam inlet and outlet sections for conducting process steam therethrough from the second process steam inlet section to the second process steam outlet section in a second process steam expansion direction; and an intermediate superheater, which is arranged downstream of the high-pressure inner housing and upstream of the low-pressure inner housing, wherein the high-pressure and low-pressure inner housings are arranged within the steam turbine outer housing and the high-pressure and the low-pressure inner housings are arranged in such a way that the first steam inlet section of the high-pressure inner housing faces the second steam inlet section of the low-pressure inner housing.

Various embodiments include a system for providing heat, cold, and/or electric power comprising: a first and a second compressor; a first and a second expander; and a first heat store and a second heat store. An output of the first compressor is thermally coupled to a first input of the first heat store and to a second input of the second heat store. An output of the second compressor is thermally coupled to a first input of the second heat store and to a second input of the first heat store. An input of the first expander is thermally coupled to a first output of the first heat store and to a second output of the second heat store. An input of the second expander is thermally coupled to a first output of the second heat store and to a second output of the first heat store.