Kabushiki Kaisha Toshiba

The Japan Steel Works, Ltd.

Toyo Shokuhin Kikai Kabushiki Kaisha

Toshiba Energy Systems & Solutions Corporation

Kabushiki Kaisha Challenge Five

Hiromichi Shingo

Eiji Yonekura

Itaru Murakami

Yukio Kii

Yukio Sasayama

Kenichi Okuno

Hiroshi Nomura

Kazuhiro Saito

Masayuki Yamada

Osamu Watanabe

Toshio Suzuki

Shigeru Suzuki

Kenichi Imai

Tsukasa Azuma

Makoto Takahashi

Yoshifumi Iwasaki

Tsuguhisa Tashima

Yomei Yoshioka

Itaru Chida

Toshio Hirano

Shinichiro Ohashi

Reki Takaku

Satoru Ohsaki

Nagatoshi Okabe

Kazunari Fujiyama

Yoriharu Murata

Tetsuya Yamanaka

Akihiro Taniguchi

Kazuhiro Miki

Hidekazu Sasaki

Koji Kajikawa

Ryou Oda

Liang Yan

Joji Kaneko

Norimichi Mori

Tsutomu Yoshihara

Motoki Yoshikawa

Kazuhiro Wada

Natsuki Ishibashi

According to an embodiment, a rotor blade cover section is integrated with the rotor blades at leading ends thereof. A plurality of sealing fins is disposed at the rotor blade cover section, the sealing fins forming a predetermined clearance relative to an inner peripheral portion of the nozzle outer ring. An annular solid particle trapping space is disposed at the inner peripheral portion of the nozzle outer ring, the solid particle trapping space communicating with an inlet of a steam leak and trapping solid particles that flow in with steam. In the sealing structure, the nozzle outer ring has a through hole through which the solid particles are to be discharged from the solid particle trapping space toward a downstream stage of the steam turbine.

Sealing structure in steam turbine

A turbine rotor blade of the embodiment is made up of plural rotor blades each including: a blade effective part, a blade planting part, and a cover part, in which the cover parts adjacent in a turbine rotor circumferential direction are engaged with each other to make up an annular blade cascade. From among the rotor blades, a cover part of a stopping blade implanted to a planting part of the turbine rotor or the cover part of at least one of the rotor blades engaged with the cover part of the stopping blade is formed at the blade top part of the rotor blade so as to be able to be fitted when the rotor blade is installed in the turbine rotor.

Turbine rotor and steam turbine

A stationary blade cascadeof an embodiment includes stationary blade structuresand a ring-shaped support structuresupporting the stationary blade structures. The stationary blade structureseach include: a stationary blade partwhere steam passes; and an outer circumference side constituent partformed on an outer circumference side of the stationary blade partand having a fitting groovewhich penetrates all along a circumferential direction and which has an openingall along the circumferential direction in a downstream end surfaceof the outer circumference side constituent part. The support structureincludes a ring-shaped support parthaving a fitting portionfitted in the fitting groovesof the outer circumference side constituent parts. The plural stationary blade structuresare supported along the circumferential direction by the ring-shaped support part

Stationary blade cascade, assembling method of stationary blade cascade, and steam turbine

A low alloy steel ingot contains from 0.15 to 0.30% of C, from 0.03 to 0.2% of Si, from 0.5 to 2.0% of Mn, from 0.1 to 1.3% of Ni, from 1.5 to 3.5% of Cr, from 0.1 to 1.0% of Mo, and more than 0.15 to 0.35% of V, and optionally Ni, with a balance being Fe and unavoidable impurities. Performing quality heat treatment including a quenching step and a tempering step to the low alloy steel ingot to obtain a material, which has a grain size number of from 3 to 7 and is free from pro-eutectoid ferrite in a metallographic structure thereof, and which has a tensile strength of from 760 to 860 MPa and a fracture appearance transition temperature of not higher than 40&#xb0; C.

Low alloy steel for geothermal power generation turbine rotor, and low alloy material for geothermal power generation turbine rotor and method for manufacturing the same

A stress treatment device has an operating unit including a head unit performing peening by irradiating an inside of a hole formed in a structure with laser to form a compressive stress region in the hole; a laser unit having an optical fiber guiding the laser to the head unit; a jetting unit jetting liquid into the hole; and a support part supporting the optical fiber in a manner of allowing the jetted liquid to flow through and being fixed in the head unit.

Stress treatment device, operating system, and method of making turbine

A turbine rotor blade according to the present invention includes a cover provided at the top of an effective blade portion and a blade-fitting portion provided at the bottom of the effective blade portion. A turbine wheel is provided with a turbine-wheel engagement portion to which the blade-fitting portion is fittable. The turbine rotor blade is a portion of a blade array structure formed by arranging the cover and a neighboring cover in contact with each other. The blade-fitting portion is provided with an anti-twist segment, and the turbine-wheel engagement portion is provided with an untwist restraining segment engageable to the anti-twist segment.

Turbine rotor blade, turbine rotor and steam turbine equipped with the same

The moving blades are configured so as to meet a condition: (L&plus;3D)&times;f&gE;14,500 or L&times;(L&plus;D)&times;f &gE;1.55&times;10 , where L is an effective length of the moving blade measured in inches, D is a blade root circle diameter of the moving blades measured in inches, and f is the rated operating speed of the turbine measured in Hz. The moving blades are formed of a titanium alloy. The dovetail has an Christmas-tree shape, and is a curved-axial-entry. The moving blades are configured and arranged so as to meet a condition: 3.5&lE;P/W&lE;7.0 or 0.8&lE;P/C&lE;1.0, where W is a width of a section of a tip of the moving blade measured along an axis of the rotor wheel, P is pitch of the moving blades, and C is a chord length of the tip section of the moving blade. Adjacent moving blades are connected to each other in such a manner that the adjacent moving blades being capable of relative movement while the adjacent moving blades being connected to each other.

Moving blades for steam turbine

An apparatus for predicting a deterioration and damage in a structural member of a prime mover or the like has a use condition monitoring unit for monitoring a condition of use of the structural member, an inspection unit for inspecting a deteriorated and damaged state of the structural member, a use condition setting unit for setting a use condition by being supplied with use condition data of the structural member from the use condition monitoring unit, a simulation unit for forming a model of the deterioration and damage in the structural member on the basis of the use condition of the structural member and a result of inspection of the structural member at a preceding time, and for simulating the advancement of the deterioration and damage in the structural member on the basis of the deterioration/damage model, and an inverse analysis unit for correcting a simulation model formed by the simulation unit by comparing the simulation model with a result of inspection of the structural member at the present time. The simulation unit is arranged to predict a future deterioration and damage in the structural member by using the corrected simulation model and the result of present inspection. By a deterioration/damage prediction apparatus of the invention using this apparatus, the deterioration and damage in the structural member can be accurately predicted using a simulation and an inverse-problem analysis method with respect to use conditions and results of inspection of the structural member, i.e., information actually available.

Method of predicting deterioration and damage of structural member and

The present invention relates to a method and apparatus for producing communication articles such as postcards, envelopes or the like in each of which display surfaces for information or the like are separably bonded with a synthetic resin therebetween by heating for concealing information such as correspondence or a printed display medium and then mailing it. It is an object of the invention to enable easy and smooth separating of a film-containing sheet and accurate insertion of a film in a sheet. In order to achieve the object, a continuous sheet having a plurality of communication article-forming sheets which are connected in series is folded in at least two, a continuous film is inserted between the sheet portions into which the continuous sheet is folded to form a film-containing continuous sheet which is then heated and pressed to that the sheet portions of the continuous sheet are bonded with the film therebetween, and the film-containing continuous sheet is then separated into the respective communication article-forming sheets by hitting the positions between the respective communication article-forming sheets of the continuous sheet while pulling the film-containing continuous sheet to produce communication articles.

Apparatus for producing communication articles including postcards and

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Tokyo, Japan

Itaru Murakami