Mitsubishi Heavy Industries Limited

Senju Metal Industry Co., Ltd.

Shingo Nishida

Kazuo Hirota

Fumiyuki Suzuki

Ryoichi Kawakami

Masaki Hata

Makoto Iwasaki

Masaaki Katayama

Kohei Yamamoto

Megumu Tsuruta

Satoshi Hiraoka

Hideyuki Morita

Kenji Kirihara

Tetsuya Arikawa

Toshifumi Nariai

A steam valve according to at least one embodiment of the present disclosure, includes: a valve body that includes a steam flow path through which steam flows, and a valve seat disposed in the middle of the steam flow path and having an opening portion; and a stop valve that includes a valve stem which extends in an axial direction, where an axis extends, and is movable back and forth in the axial direction, and a first valve disc which is fixed to a distal end part of the valve stem and is abutted against the valve seat to close the steam flow path. The valve stem is partitioned into a first valve stem to which the first valve disc is fixed and a second valve stem different from the first valve stem.

Steam valve and power generation system

A sealing device includes a movable part which is fixed to a shaft penetrating a wall of a vessel and is movable with the shaft, the vessel being configured to include an interior space, a first bellows part which has a first end fixed to the vessel and a second end fixed to the movable part, for sealing a penetrated portion of the vessel by the shaft, a second bellows part which is disposed opposite to the first bellows part across the movable part, and has a first end disposed on a side of the first bellows part and fixed to the movable part, and a second end fixed to a stationary member, and a communication path for causing an interior space of the first bellows part and an interior space of the second bellows part to communicate with each other.

Sealing device and drive apparatus including the same

A measurement method for a steam valve according to at least one embodiment of the present disclosure, includes: a step of measuring acceleration of a valve stem when a slave valve is opened by driving the valve stem with an actuator from a fully closed state of a master valve and the slave valve; a step of detecting a timing at which the slave valve is fully opened, based on the measured acceleration of the valve stem; and a step of calculating an amount of movement of the valve stem from a reference position to a position where the slave valve is fully opened.

Measurement method for steam valve and measurement device for steam valve

A steam valve having a first inclined surface, which is formed at the distal end portion of a valve rod and in which the outer diameter of the valve rod increases from the distal end toward the base end of the valve rod, and a second inclined surface, which is formed on the inside of a portion of a main valve that is positioned on the base-end side of the valve rod and which inclines with the same inclination angle as the first inclined surface. In a state in which a slave valve and the main valve are closed the first inclined surface and the second inclined surface are separated from each other, and when the slave valve and the main valve are in a fully open state the first inclined surface and the second inclined surface abut each other.

A supporting force inspection device for inspecting a supporting force of a vibration suppression member interposed between bend portions of a plurality of heat transfer tubes of a steam generator includes: an acceleration sensor for detecting a vibration state of the bend portion; a sensor holding part disposed inside the heat transfer tube and configured to hold the acceleration sensor; and a vibration force generation part configured to generate a vibration force for vibrating the heat transfer tube along a plane in which a curvature circle of the bend portion exists. The vibration force generation part is configured to cooperate with the sensor holding part and vibrate the heat transfer tube along the plane in which the curvature circle exists.

Supporting force inspection device and supporting force inspection method

In a seal structure for a heat exchanger, the seal structure being mounted on a baffle plate disposed in a shell included in the heat exchanger and being partially in contact with a wall surface on an inner surface side of the shell, the seal plate is composed of a plurality of thin plates which are laminated; the thin plates are in contact with the wall surface while being curved by an elastic deformation; a contact thin plate serving as one of the thin plates located on an outermost side of the curve is in contact with the wall surface; and an outer surface of the contact thin plate serving as a surface on an outside of the curve among surfaces arranged in a thickness direction of the contact thin plate is in contact with the wall surface so as to restrain seal performance from deteriorating.

Seal structure for heat exchanger and heat exchanger

There is provided a contact force evaluation method for evaluating a contact force against a supporting member of a tube bundle positioned in a fluid and supported by the supporting member, including a contact force setting step of setting a contact force of the tube bundle, a probability density function calculation step of calculating a probability density function of a reaction force received by the supporting member from the tube bundle in response to a predetermined input, using a vibration analysis model of the tube bundle and the supporting member, a probability calculation step of calculating a probability that a reaction force equal to or higher than the set contact force occurs, based on the calculated probability density function, and an evaluation step of evaluating the set contact force, based on the calculated probability.

Contact force evaluation method

A guide vane has a devised guide configuration for changing a flow direction of molten solder. The guide vane comprises a half-cylindrical platehaving a prescribed inner surface shape and a prescribed height, being stood on a prescribed board and changing a flow direction of fluid; and a half-cylindrical platehaving a prescribed inner surface shape and a prescribed height, being stood on the boardon which the first memberis stood and changing the flow direction of the fluid as shown in FIG.. The half-cylindrical plateand the half-cylindrical plateare faced so that an inner surface of the half-cylindrical plateis faced to an edge of the half-cylindrical plateand an inner surface of the half-cylindrical plateis faced to an edge of the half-cylindrical plate. This structure allows to jet the molten solder to a target place and uniformize a widthwise distribution of the jetting height of the molten solder.

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Tokyo, Japan

Shingo Nishida