Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Ishibashi Manufacturing, Co., Ltd.

Toshiba Tec Kabushiki Kaisha

Japan Engine Corporation

Hideaki Nishida

Hiroshi Suzuki

Takashi Shiraishi

Isao Tomita

Tomohiro Numajiri

Motoki Ebisu

Kazutaka Suzuki

Tatsuo Ishiguro

Noriyuki Hayashi

Taku Ichiryu

Takaya Futae

Yoshitomo Noda

Shuichi Isayama

Tadasuke Nishioka

Yutaka Ozawa

Atsushi Yuge

Tadao Yashiki

Hiroshi Kanki

Shinji Ogawa

Seita Seki

Kazufumi Takayanagi

Hiroshi Ogita

Keitaro Kamata

Chiaki Yasuda

Toshiharu Goya

Haruki Hitomi

Nobuaki Satou

Michiya Uchida

Hiroyasu Ochiai

A tapered land thrust bearing device with a land surface having a substantially reduced area without changing the contour shape of the land surface even if the area of the land surface is small, and high mechanical efficiency, as well as a turbocharger provided with the bearing device. A tapered land thrust bearing device includes: a flange portion fitted onto a rotary shaft and including a first thrust portion; and a thrust member including a second thrust portion which is disposed around a through hole and which faces the first thrust portion of the flange portion.

Tapered land thrust bearing device and turbocharger provided with the bearing device

An object is to provide a floating bush bearing device with excellent oscillation stability and small bearing loss. A floating bush bearing device which rotatably supports a rotation shaft includes: a bearing housing, a floating bush rotatably disposed between the rotation shaft and an inner circumferential surface of the bearing housing, in the bearing housing, and a bush side oil supply hole which is formed through the floating bush and is capable of supplying lubricating oil between the rotation shaft and the inner circumferential surface of the floating bush, the inner circumferential surface of the floating bush has a non-circular shape so that a gap portion is formed between the rotation shaft and the inner circumferential surface of the floating bush, the gap portion having a predetermined clearance or larger regardless of relative positions of the rotation shaft and the inner circumferential surface of the floating bush, and the bush side oil supply hole communicates with the gap portion.

Floating bush bearing device and supercharger including the same

A turbocharger and a method of manufacturing a floating bush with which noise can be reduced, and the rotation speed can be increased. In a turbocharger in which a rotating shaft having a circular cross-section and connecting a turbine rotor and a compressor rotor is supported in a freely rotatable manner, at two axially separated positions via floating bushes, by an inner circumferential surface disposed so as to surround the rotating shaft in a bearing housing, an inner circumferential surface of each of the floating bushes has a non-circular shape in which the curvature of the cross-sectional shape varies in the circumferential direction.

Turbocharger and method of manufacturing floating bush

It is intended, with respect to a first floating bush bearing disposed on a compressor housing side and a second floating bush bearing disposed on a turbine housing side, to improve oscillation stability when a turbine rotor revolves at a high speed, reduce the number of parts, and facilitate processing and assemblability. Provided are a bearing housing () for a turbocharger (), a rotor shaft () passing through the bearing housing (), a first floating bush bearing () interposed between the bearing housing () and the rotor shaft () and disposed on a compressor housing () side and comprising a first floating bush, and a second floating bush bearing () that has the same shape as the first floating bush bearing () and is disposed on a turbine housing () side and comprises a second floating bush (). The inner bearing width (Li) of the first and second floating bushes is formed to be smaller than the outer bearing width (Lo) by the same proportion in both bushes.

Bearing device for turbocharger

A planetary gear train is provided with: a carrier; a planetary gear; a planetary pin inserted into an insert hole provided through the planetary gear and coupled to the carrier to rotatably support the planetary gear; a thrust collar attached to a surface opposed to the planetary gear of the carrier so as to surround the planetary pin; and a pin for coupling the thrust collar to the carrier. The thrust collar has a first surface opposed to the carrier and a second surface opposed to the planetary gear, and has a first pin hole provided on the first surface so as not to reach the second surface. The carrier has a second pin hole on a surface opposed to the planetary gear. The thrust collar is attached to the carrier by inserting the pin into the first pin hole of the thrust collar and into the second pin hole of the carrier.

Planetary gear train with thrust collar used as thrust bearing of planetary gear and wind turbine generator incorporating the same

A planetary gear unit including a ring gear, a sun gear provided on an inner circumferential side of the ring gear, at least one planetary gear arranged between the ring gear and the sun gear to mesh with the ring gear and the sun gear, a planetary pin fixed to a carrier and inserted in a shaft hole of the planetary gear, and a slide bearing arranged between the planetary gear and the planetary pin, wherein the slide bearing is formed of a resin material and is provided on an outer periphery of the planetary pin at least in a region where the planetary pin slides relative to the planetary gear.

Planetary gear unit and wind turbine generator

A planetary bearing structure which does not require forcible oil supply of planetary bearing using slide bearing, and which can reliably supply oil to a sliding surface and lubricate the sliding surface with a simple structure. The planetary bearing structure including: a planetary pin () fixed to a carrier (), and a planetary gear () having a slide bearing () mounted on an inner peripheral surface of a shaft hole (), in which the planetary pin () turnably supports the planetary gear () through the slide bearing (), and both end surfaces (L,R) of the planetary gear () form a pair of gaps (SL, SR) between opposed wall surfaces (L,R) of the carrier () and rotate, wherein a pair of spiral grooves (L,R) formed in one of the gear end surfaces (R) forming the pair of gaps (SL, SR) and the opposed wall surfaces (L,R) and oppositely oriented at gaps (SL, SR), and the planetary bearing structure has such a lubricant oil passage that the gaps (SL, SR) take an oil bath in lubricant oil, lubricant oil introduced from the sucking side gap (SR) passes between the planetary pin () and the slide bearing () and is discharged from the other discharging side gap (SL).

Planetary bearing structure

In a planetary bearing structure equipped with a slide bearing mounted to a shaft hole of a planetary gear, the planetary gear rotating about the outer periphery of a planetary pin fixed to a carrier via the slide bearing, one or a plurality of oil supply grooves are formed in the outer peripheral surface of the planetary pin so as to extend in the axial direction. An oil supply port of a lubricant oil channel opens in the oil supply groove so as to forcedly supply lubricant oil. Furthermore, a discharge groove for trapping foreign matter, which is shallower than the oil supply groove, communicates from the oil supply groove to the wake flow side in the rotating direction of the planetary gear.

Growing community of inventors

Tokyo, Japan

Hideaki Nishida