Mitsubishi Heavy Industries Limited

Yokogawa Electric Corporation

Hideyuki Toda

Tetsu Konishi

Ryotaro Magoshi

Takaaki Matsuo

Yoshinori Tanaka

Taku Ichiryu

Soichiro Tabata

Asaharu Matsuo

Yasuhiro Sasao

Yoshiyuki Morii

Yu Shibata

Shohei Danno

Haruo Ishisaka

Eiichiro Watanabe

Keizo Tanaka

Toyokazu Kuwana

A steam turbine blade includes a blade body () including blade surfaces () extending in a blade height direction. The blade body () includes a first suction port () extending in the blade height direction and opening in the blade surface (), a first drain flow path () internally extending in the blade height direction, and first communication passages () internally provided away from one another in the blade height direction and independently of one another and making the first drain port () and the first drain flow path () in communication with each other.

Steam turbine blade, steam turbine, and method for manufacturing steam turbine blade

A communication system comprising first and second master stations configured to perform synchronous wireless communication with a slave station via a first network, and a control station configured to be connected to the first and second master stations via a second network, wherein the control station transmits time information used to synchronize times of the first and second master stations to each of the first and second master stations via the second network, wherein one of the first and second master stations performs timing based on the time information from the control station, and wherein the other of the first and second master stations performs the timing based on announcement information announcing the time information transmitted from the one of the first and second master stations via the first network.

Communication system, communication device, and communication method

The present invention aims at providing a technique for providing a stepped structure separately to a rotating shaft in a later step of assembly for preventing oil leakage from a bearing box. To this end, the rotating machine of the present invention includes a rotating shaft having a rotating member, a bearing device including a rotating shaft insertion hole larger in diameter than the rotating shaft, an oil thrower provided between an outer circumferential portion of the rotating shaft insertion hole and the rotating shaft, and an additional ring attached to the rotating shaft between the oil thrower and the rotating shaft such as to protrude in a radial direction of the rotating shaft.

Rotating machine and additional ring

A rotor coupling having insulated structure which can assuredly prevent galvanic corrosion of beating members, rotors and the like which is caused by shaft voltage, is provided in a shaft system that requires insulation. A generator is disposed in between a steam turbine and a gas turbine or a rotating machinery such as another steam turbine. The rotor coupling having insulated structure is employed in power generating equipment in which a generator is disposed in between a steam turbine and a gas turbine or a rotating machinery such as another steam turbine, a generator rotor and a rotating machinery rotor are connected, a first grounding electrode is provided to the steam turbine rotor, and a second grounding electrode is provided to the generator rotor, wherein both the rotors between the generator and the steam turbine are connected in an electrically insulated state.

Rotor coupling having insulated structure

Precision cast hollow stationary blade used for final stage of steam turbine is improved to enhance drain recovery efficiency. Hollows (,), sectioned by rib (,) to be independent of each other, are formed in stationary blade (,) passing therethrough from outer shroud,to inner shroud,. A plurality of ventral slits (,to,) are provided on blade surface ventral side linearly with predetermined interval between the slits in two parallel rows. Dorsal slits (,to,) are also provided linearly with predetermined interval between the slits. Drain on blade surface enters the hollows (,) through the ventral slits (,to,) and the dorsal slits (,to,), respectively, and flows out of the outer shroud (,) or the inner shroud (,) as drain (,to,) to be recovered. While prior art hollow is single hollow and drain entering the hollow through the dorsal slits flows out through the ventral slits or reverse case thereof occurs, the hollows (,) of the present invention being sectioned by the rib (,), the drain is prevented from flowing out to the opposite side.

Steam turbine stationary blade

A two stage jointed stationary blade of a high pressure or intermediate pressure steam turbine is formed with a bolt joint in place of a welded joint so as to make detachment and disassembly possible, and thereby facilitating maintenance and inspection work and reducing assembling man-hours. A stationary blade (front stage)(,), outer ring front portion (,) and inner ring front portion (,) are welded into an integral structure. A stationary blade (rear stage),, outer ring rear portion (,) and inner ring rear portion (,) are also welded into an integral structure. The outer ring front portion,, outer ring center portion,and the outer ring rear portion,are mutually engaged via engaging portions (,and,) with precise positioning and then jointed together integrally by bolt (,). The two stage jointed stationary blade can be engaged with moving blades (,), labyrinth seals (,) can be fitted to seal fitting portions (,), and seal fins (,) can be fitted in seal fin grooves (,).

Steam turbine jointed stationary blade

Growing community of inventors

Tokyo, Japan

Hideyuki Toda