Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Dowa Mining Co., Ltd.

Dowa Electronics Materials Co., Ltd.

Mitsubishi Power, Ltd.

The University of Tokyo

Kazuyuki Matsumoto

Yoshihiro Kuwamura

Yoshinori Tanaka

Hiroharu Oyama

Hideaki Sugishita

Toyoharu Nishikawa

Asaharu Matsuo

Kenichi Inoue

Chongfei Duan

Hideki Ono

Hidekazu Uehara

Kiyoshi Segawa

Hisataka Fukushima

Shin Nishimoto

Kimitaka Sato

Shin-ichi Ohkoshi

Shunsuke Sakurai

Takatoshi Fujino

Hiroshi Hachiya

Soichiro Tabata

Asuka Namai

Takashi Gotoh

Kenji Murata

Kazushi Sano

Seiichi Hisano

Kazuhisa Saito

Satoshi Aizawa

Ken Inoue

Eiji Konishi

Naoto Omura

Yukinori Machida

Sayaka Umeda

Shigeo Ookura

Kei Nakanishi

Tadashi Takahashi

Shinya Sasaki

Makoto Iwasaki

Kentaro Tanaka

Masaaki Matsuura

Shunsuke Mizumi

Koichi Ishizaka

Takaaki Kaikogi

Rimpei Kawashita

Yoshiyuki Okabe

Ryo Murakami

Hiroharu Ooyama

Shinji Fukao

Takenori Yorinaga

Makoto Kamishita

Kenichi Fujikawa

A sealing device according to at least one embodiment includes not less than three arc-shaped fins arranged in an axial direction. The arc-shaped fins include: a first fin which is one of two outermost fins located on an outermost side in the axial direction; a second fin disposed adjacent to the first fin in the axial direction; and at least one third fin disposed opposite to the first fin across the second fin in the axial direction. It is preferable that the third fin is disposed to be inclined with respect to a radial direction such that a tip end portion is located on a side of the first fin in the axial direction relative to a base end portion, and the third fin has a larger inclination angle than the first fin or the second fin with respect to the radial direction.

Sealing device and rotary machine

A steam turbine provided with: a rotor; a plurality of movable blades each of which has a movable blade body and a shroud, and which are circumferentially arranged at intervals; a casing that has a recessed section for accommodating the shroud; fins that form clearances from the outer circumferential surface of the shroud; a stator blade support part disposed on the downstream side of the recessed section; a plurality of stator blades circumferentially arranged at intervals; and an annular partition plate that extends from a recessed section downstream surface toward the upstream side thereof. The casing has formed therein a bypass flow passage that communicates a region radially outside of the partition plate and a region between the stator blades.

Axial flow turbine

A turbine includes a rotor including a rotation shaft that rotates around an axis and a blade row formed on an outer surface of the rotation shaft; a casing, which covers the rotor, has a casing inner surface being expanded radially outward approaching a downstream side of the casing in a direction of the axis; and an inner member body formed to line the casing inner surface of the casing such that an extraction port is formed between an upstream side end of the inner member body and the casing inner surface. A discharge port is formed between a downstream side end of the inner peripheral member body and the casing inner peripheral surface. The extraction port and the discharge port are formed in an annular shape centered on the axis. A flow path cross-sectional area of the discharge port is smaller than that of the extraction port.

Turbine

A rotating machine includes a rotating body rotatably supported in a casing; a rotor blade fixed to an outer peripheral portion of the rotating body; a stator blade arranged on a downstream side in a fluid flow direction with respect to the rotor blade and fixed to an inner peripheral portion of the casing; a sealing device arranged between the inner peripheral portion and a front end of the rotor blade; a swirling flow generation chamber provided in the casing on the downstream side from the sealing device along a circumferential direction of the rotating body; and guiding members provided in the swirling flow generation chamber along a radial direction of the rotating body and in the circumferential direction at predetermined intervals. The swirling flow generation chamber has a wall surface located on the downstream side from an edge of the stator blade on an upstream side.

Rotating machine

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.

An exhaust hood (Ec) of the present invention is provided with an inner casing (), an outer casing (), and a diffuser (). The inner casing () surrounds a rotor from the outside in a radial direction, and forms a first space () in which a fluid flows in an axial direction (Da) between the rotor and the inner casing (). The diffuser () is provided with a bearing cone () that has a diameter that gradually widens moving towards an axial downstream side (Dad) and forms a cylindrical shape extending to the axial downstream side (Dad) to be continuous with the outer circumferential surface of a rotor shaft that forms the first space (). An end edge () on the axial downstream side (Dad) of the bearing cone () forms an oval shape in which, in a direction orthogonal to an axial line (Ar), a distance (R) between the axial line (Ar) and a second cone end part () of a second side (Dan) is greater than a distance (R) between the axial line (Ar) and a first cone end part () of a first side (Dex).

Exhaust hood and steam turbine

A rotating machine includes a hollow casing; a rotating body 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 rotating body to be offset to the stator blade in an axial direction of the rotating body; a sealing device arranged between the inner peripheral portion and a tip of the rotor blade; a swirling flow generation chamber provided in the casing on a downstream side in a fluid flow direction from the sealing device along a circumferential direction of the rotating body; first guiding members provided in the swirling flow generation chamber along a radial direction and in a circumferential direction of the rotating body at predetermined intervals; and a second guiding member provided in the chamber along the circumferential direction while intersecting the first guiding members.

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.

Steam turbine and exhaust chamber therefor

In a rotating machine, a tip shroud of a rotor blade includes a plurality of shroud outer peripheral surfaces which are provided such that radial positions of the shroud outer peripheral surfaces are located stepwise radially outward from an upstream side toward a downstream side, and a step portion which connects adjacent shroud outer peripheral surfaces to each other. The step portion includes an acute angle-forming surface which extends toward the upstream side while extending toward a radially outer side and is connected to an upstream-side end portion of the shroud outer peripheral surface located on the downstream side with an acute angle &#x3b8;

Rotor blade, rotor unit, and rotating machine

A steam turbine exhaust chamber includes a casing and a bearing cone disposed in the casing. The casing has a recess provided along at least a part of a circumference of the casing on a radially outer side of a downstream end of the bearing cone and recessed downstream in an axial direction with respect to the downstream end of the bearing cone.

Steam turbine exhaust chamber and steam turbine

A rotor machine includes a rotor which includes a recessed portion, a stator blade which includes a stator blade body and a shroud, and a fin. The recessed portion includes a recessed portion radial wall surface which extends in a radial direction, and the recessed portion radial wall surface includes a first wall surface which extends radially outward, a second wall surface which extends further radially outward than the first wall surface, and a protrusion surface which protrudes toward an upstream side in the axis direction from the first wall surface. The shroud includes a shroud radial wall surface facing a downstream side in the axis direction of the recessed portion radial wall surface, and a shroud groove portion is formed in the shroud.

Rotary machine

An axial flow rotating machinery includes: a rotor; a casing; a rotating-blade stage including rotating blades and a radially-outer side rotating blade ring continuing to radially outer ends of the rotating blades; and a rotating-blade side seal device configured to seal a gap between the radially-outer side rotating blade ring and the casing. The rotating-blade side seal device includes: a seal fin having an annular shape and extending toward an outer peripheral surface of the radially-outer side rotating blade ring from the casing; and a swirl brake fixed to the casing in a cavity formed at an upstream side of the seal fin. The swirl brake includes: a first plate-shaped member having a surface along a radial direction of the rotor; and a second plate-shaped member or a third plate-shaped member having a surface oblique to the radial direction of the rotor.

Axial flow rotating machinery

A steam turbine (ST) includes a rotor () which is rotatable around an axis (Ar), an inner casing () surrounding the rotor () from an outer peripheral side, an outer casing () surrounding the rotor () and the inner casing () and defining an exhaust chamber between the inner casing () and the outer casing (), the steam being exhausted to the exhaust chamber (), and a flow guide () which has a tubular shape and is installed on one end portion of the inner casingin an axial direction (Da) in the exhaust chamber () to guide the steam discharged from the rotor (). The flow guide () has a turning surface (RA) which is connected to an outer peripheral surface (A) and turns a fluid flowing along the outer peripheral surface (A) toward the other side in the axial direction (Da).

Steam turbine

In an axial turbomachinery related to the invention, a structural body has a casing fin, a blade is provided with an upstream inclined surface that is inclined from an upstream side toward a downstream side, the structural body is provided with an upstream inclined inner wall surface that is inclined from the upstream side the downstream side, an inclination angle of the upstream inclined surface with respect to a central axis of relative rotation between the blade and the structural body is larger than an inclination angle of the upstream inclined inner wall surface with respect to the central axis, and an end position of the upstream inclined surface on a radially inner side is located radially outside an end position of the upstream inclined inner wall surface on the radially inner side.

Axial turbomachinery

There is provided a rotary machine including a rotary shaft; a plurality of rotor blades extending outward from the rotary shaft in a radial direction of the rotary shaft, and are provided with gaps therebetween in a peripheral direction of the rotary shaft; a casing surrounding the rotor blades radially outside the rotor blades, and in which a recessed portion as a cavity accommodates tips of the rotor blades; a sealing portion extending from one of a bottom surface of the recessed portion and the tip of the rotor blade, and having a clearance with the other; a jet flow passage through which a fluid is jetted rearward in a rotation direction of the rotary shaft in the cavity; and a valve which is capable of switching a flow condition of the jet flow with turning the valve on an opening state and a closing state.

Growing community of inventors

Tokyo, Japan

Kazuyuki Matsumoto