Ishikawajima-harima Jukogyo Kabushiki Kaisha

Kazuya Miyashita

Nobuyuki Ikeya

Yuichi Iguchi

Hidetsugu Matsubara

Toshihiko Kitazawa

Shingo Yamauchi

Shinya Tanaka

Akihiro Ookita

The center of gravity of a retaining pin which is struck into a retaining-pin receiving hole to join a rotor barrel with a rotor shaft is eccentrically positioned toward the leading end of the pin beyond the axis of the shaft so that upon rotation of the rotor, the pin is forced to thrust toward the bottom of the hole by the centrifugal force, thereby preventing the pin from pulling out of the hole.

Rotor with eccentrically positioned retainer pin

In a turbocharger of the type in which a turbine and a compressor are disposed in back-to-back relationship and bearings are disposed on the suction side of the compressor, the turbine and the compressor are isolated thermally from each other; the service life of the antifriction bearings is increased; lubrication oil sealability is improved; and machining of a shaft is facilitated.

Turbocharger

An oil film damper whose one portion is supported, whose free end portion or portions define oil film formation portions and which has a Rahmen or rigid frame structure is used so that a minimum quantity of lubricating oil only sufficient to fill clearances in which oil films are formed can have a function of satisfactorily damping shaft vibrations. A jet of lubricating oil fed from the exterior of the oil film damper is directly supplied to each ball bearing so that the satisfactory lubrication of ball bearings is ensured, the overall function of the bearing device is improved and a service life thererof is increased.

Bearing device for rotary machine

A bearing device for a turbocharger wherein a bearing casing is interposed between a turbine casing and a compressor casing; disposed within a bearing housing of the bearing casing are a ball bearing on the side of the turbine and a ball bearing on the side of the compressor both of which is supported by a one-piece oil film damper which is floating; and a pin is loosely fitted into the oil film damper and the bearing housing so as to prevent the rotation of the oil film damper.

Growing community of inventors

Chiba, Japan

Kazuya Miyashita