Mitsubishi Heavy Industries Marine Machinery & Equipment Co., Ltd.

Mitsubishi Heavy Industries Limited

Fumito Hiratani

Kenji Uchida

Nao Taniguchi

Isao Tomita

Yoshihito Kobayashi

Yasuhiro Wada

Takeshi Tsuji

Yoshihisa Ono

Seiichi Ibaraki

Koichi Sugimoto

Hironori Honda

Yukihiro Iwasa

Hiroyuki Hosoya

Yuichiro Hirano

Taiyo Shirakawa

Hidetaka Nishimura

Keiichi Shiraishi

Tetsuya Matsuo

Satoshi Makino

Yasuhiro Obase

Yusuke Yano

A turbocharger gas casing includes a scroll part forming a plurality of scroll passages at a same position in an axial direction of the turbine. The plurality of scroll passages include a first scroll passage. The first scroll passage is configured so that an extension line of a line segment connecting a farthest position from a rotational axis of the turbine at an inlet for an exhaust gas of the first scroll passage and a position of a tip of a tongue part formed on an inner peripheral side of the first scroll passage does not intersect a rotor blade of the turbine in a cross section of the turbine orthogonal to the axial direction.

Turbocharger gas casing and turbocharger

An impeller includes: a disk-shaped hub centered on an axis; and a plurality of blades arranged in a circumferential direction and protruding from a surface of the hub facing one side in a direction of the axis. In a cross-sectional view including a blade height direction which is a direction away from the hub toward a tip of each blade, the blade has a recessed surface curved convexly toward a rear side in a rotational direction. In the cross-sectional view, when a distance between an imaginary line connecting a tip-side edge and a hub-side edge of the blade and a midspan of the blade along a direction perpendicular to the imaginary line is defined as a recess amount, the blade has a portion where the recess amount increases from a leading edge side to a trailing edge side.

Impeller and centrifugal compressor

An impeller back surface cooling structure for cooling a back surface of a compressor impeller of a supercharger includes: a first member facing a back surface of a compressor impeller via a gap; and a second member extending in a circumferential direction of the compressor impeller and forming, between the first member and the second member, a cooling passage through which a cooling medium being a liquid flows.

Impeller back surface cooling structure and supercharger

Growing community of inventors

Tokyo, Japan

Fumito Hiratani