Mitsubishi Heavy Industries Limited

Mitsubishi Power, Ltd.

Mitsubishi Heavy Industries Machine Tool Co., Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Takumi Hori

Hidekazu Uehara

Norihisa Takei

Ken Onishi

Tanehiro Shinohara

Kenji Nishikawa

Ikuo Wakamoto

Shimpei Yokoyama

Shunsuke Tanaka

Hiromu Okamoto

Hidetaka Kafuku

Nobuhiro Kunitake

Satoshi Tsuzuki

Atsushi Sugiura

Noriaki Shimonabe

Masao Watanabe

Masaya Kawano

Shin Nishimoto

Osamu Hasegawa

Katsuhisa Hamada

Takao Ito

Shin Asano

Kohei Ozaki

Kazuhiko Yamashita

Azumi Yoshida

Yasuharu Suda

Takaaki Kaikogi

Megumu Tsuruta

Katsuya Sennyu

Yuichi Otani

Yasuyuki Fujiya

Zenichi Yoshida

Hiroshi Funakoshi

Takehisa Okuda

Tamiaki Nakazawa

Tatsuro Furusho

Yasushi Takayama

Tomoki Hanada

Ryokichi Hombo

Kentarou Saeki

Shintaro Okumura

Manabu Maeda

Hisanori Watanabe

Naotaka Komatsu

Hiroki Mitsui

Hayao Kurono

Shuhei Dobara

This seal device comprises: a movable seal ring arranged so as to be deformable in the radial direction, in a state of facing an outer peripheral surface of a rotor of a steam turbine capable of rotating around the axis; a first elastic member provided to each of end surfaces of the movable seal ring in the circumferential direction; and a second elastic member that is provided to an intermediate position in the circumferential direction of the movable seal ring and urges the movable seal ring outward in the radial direction.

Seal device

A pit gate includes a gate body which is inserted between a pool portion storing water and a canal portion connected to the pool portion and is configured to change a flow state of the water, and a seal portion () which is accommodated in a groove-shaped accommodation recess formed in the gate body and seals between the pool portion and the gate body. The seal portion () includes a low-rigidity portion () which is relatively easily deformed by a load according to a water pressure from the pool portion side, and a high-rigidity portion () which is provided on the pool portion side of the low-rigidity portion and is not easily deformed relatively by the load.

Pit gate, pit equipment, nuclear power facility, and pit gate installation method

An oil field pump is installed within a pipe that connects to an oil field, and feeds accumulated extraction oil in a predetermined direction, the oil filed pump including a rotor with an internal flow path for the extraction oil, a stator installed on the outer circumference of the rotor, a thrust bearing that supports the axial weight of the rotor and the stator, a supply pipe that supplies a portion of the extraction oil in the flow path to the thrust bearing, and a filter that is installed at further upstream on the flow path than the supply pipe along the flow direction of the extraction oil, and traps foreign matter.

Oil field pump

An oil field pump installed within a pipe that connects to an oil field, feeds accumulated extraction oil in a predetermined direction and includes a rotor, a stator mounted on the outer circumference of the rotor, a flow path for flow of the extraction oil connecting an area formed within the rotor to an area formed between the rotor and the stator, a thrust bearing that supports the axial weight of the rotor and the stator, and a supply pipe that supplies a portion of the extraction oil in the flow path to the thrust bearing. The thrust bearing includes a protrusion part fixed to the outer circumference of the rotor and rotating as one piece with the rotor, and a facing part fixed to the stator and facing opposite a surface in the axial direction of the protrusion.

In a steam turbine including a rotor including a free side end fixed by a journal bearing in a radial direction and a fixed side end fixed by a thrust bearing in an axial direction, and a casing including a fixed side end fixed by the thrust bearing in the axial direction, a casing position adjustment device is configured to adjust an axial position of the casing with respect to the rotor due to thermal expansion. The casing position adjustment device includes: a low-pressure casing end plate, which is an end plate oriented to a free side in the axial direction in a low-pressure casing of the casing, and has a diaphragm deformable in the axial direction; and actuators, which are configured to deform the low-pressure casing end plate so that the low-pressure casing end plate extends toward the free side in the axial direction.

Casing position adjustment device

A shaft sealing structure for a rotation shaft, includes a sealing ring having ends formed by removal of its part. The ends abutting each other are continuous in the circumferential direction when the sealing ring is reduced in diameter to a radially inner side. The sealing ring is provided along the circumferential direction of the rotation shaft so as to be contactable with an outer peripheral surface of the rotation shaft. The structure also includes a pressing member configured to be movable between a pressing position and a retracted position; an elastic member configured to bias the pressing member toward the pressing position by elastic force; and a support member configured to support the pressing member at the retracted position against the elastic force, and to allow the pressing member to move to the pressing position at a predetermined temperature.

Shaft sealing structure and primary coolant circulation pump

A rotary machine has a housing that houses a fluid in a supercritical state, a rotary shaft that penetrates the housing, rotation rings that rotate integrally with the rotary shaft, and stationary rings that contact the rotation rings when the rotary shaft is stopped, the stationary rings being positioned in a state in which sealing gaps are defined between the rotation rings and the stationary rings when the rotary shaft rotates, a circulating pipe path that supplies a portion of the fluid to inlet portions of the sealing gaps, a temperature-adjusting device that adjusts a temperature of the fluid in the circulating pipe path, and a control unit that controls operation of the temperature-adjusting device so as to heat the inlet portions of the sealing gaps to a predetermined temperature before the rotary shaft is driven.

Rotary machine

An opening and closing device that opens and closes an access port opened from a substantially cylindrical working platform disposed inside a reactor vessel and used to access a nozzle stub of the reactor vessel from the inside of the working platform, the opening and closing device includes: a cover that is slidable along an outer peripheral surface or an inner peripheral surface of the working platform from a closing position where the access port is closed to an opening position where the access port is opened; and moving device for sliding the cover.

Opening and closing device for access port that opens to working platform of reactor vessel

A reactor vessel that performs work inside a nozzle stub of the reactor vessel, including a platform unit that is provided at an upper portion inside the reactor vessel and includes a substantially cylindrical side wall portion and a bottom portion blocking the lower end of the side wall portion; an access window that is provided at the side wall portion of the platform unit an access window moving device that opens and closes the access window; a working device; and a control device that is provided at the outside of the reactor vessel and controls the access window moving device and the working device, wherein the control device drives the access window moving device to open the access window, drives the working device to perform work inside the nozzle stub, and then drives the access window moving device to close the access window after the performance of the work.

Nozzle stub working system for reactor vessel

A steam turbine casing position adjusting apparatus capable of employing a compact low-resolution actuator is provided. A steam turbine casing position adjusting apparatusincludes turbine casingsand, a rotor, and actuatorsandthat move the turbine casingsandin the axial direction. The actuatorsandare disposed radially outside outer peripheries forming the turbine casingsand

Steam turbine casing position adjusting apparatus

A movable vacuum welding device () includes a vacuum chamber () having an edge section () opposite to a surface of a welding target (T) and forming a vacuum space between the surface of the welding target (T) and the vacuum chamber (), a seal section () interposed between the edge section () and the welding target (T) throughout the entire circumference of the edge section (), a welding head () configured to perform welding on the surface of the welding target (T) in the vacuum space, and a preload unit () configured to previously apply a load to the seal section (). The seal section () includes a first seal member () formed of an elastic material and extending along the edge section (), and a second seal member () disposed at least a rear side in a relative moving direction in which a welding bead (W) passes and having higher flexibility than the first seal member ().

Movable vacuum welding device

Growing community of inventors

Tokyo, Japan

Takumi Hori