Kabushiki Kaisha Toshiba

Naritoshi Nakagawa

Kazuyuki Nakamura

Takanori Nakamura

Than Trong Long

Tadashi Oguma

Hajime Koyama

Makoto Mikami

Hideyuki Kawajiri

Satoru Kuboya

Takuya Tomioka

Yasumi Kizaki

Toshimasa Mukai

Masaji Tsutsui

Fumio Takimoto

A hydraulic turbine according to an embodiment includes a turbine body, a running water surface provided in the turbine body, the running water surface defining a channel for water, and a coating layer provided on the running water surface, the coating layer being formed by water-repellent paint or hydrophilic paint.

Hydraulic turbine and pipe

A bearing device of embodiment is usable for a hydraulic machine having a rotary shaft of a vertical shaft, with a water tank storing lubrication water, and a bearing pad supporting a skirt member on the rotary shaft in the lubrication water. The bearing device has a first supporting mechanism slidably supporting the bearing pad from the radial direction, and a second supporting mechanism slidably supporting the bearing pad from a bottom portion side in an axial direction. One of a supporting surface supporting the bearing pad in the first supporting mechanism and a supported surface supported by the supporting surface in the bearing pad is formed in a convex shape. One of a supporting surface supporting the bearing pad in the second supporting mechanism and a supported surface supported by the supporting surface in the bearing pad is formed in a convex shape.

Bearing device and hydraulic machine

A fluid machine of an embodiment includes a sealing portion formed of an annular minute gap between a runner band of a runner configuring a rotating portion and a sealing liner which is a stationary portion and arranged in opposition to the runner band. A groove having a quadrangular cross-sectional shape is formed circumferentially on a surface of the sealing liner configuring the sealing portion. In a cross section perpendicular to a groove forming direction of the groove, an angle &#x3b8;, formed between a side WU of the groove on the most upstream side with respect to the flowing direction of the leakage flow and a side Wof the groove which is on an extended line of the surface of the sealing liner, is determined to be 15&#xb0; or more and 40&#xb0; or less.

Fluid machine

Growing community of inventors

Yokohama, Japan

Naritoshi Nakagawa