Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Daiichi Sankyo Company, Limited

Mitsubishi Heavy Industries Compressor Corporation

Exelixis, Inc.

Hitachi Industrial Equipment Systems Co., Ltd.

Noriyuki Hayashi

Hiroshi Suzuki

Yasuaki Jinnai

Motoki Ebisu

Yukio Yamashita

Takaya Futae

Takao Yokoyama

Kazumasa Aoki

Byeongil An

Seiichi Ibaraki

Masaki Tojo

Takashi Arai

Isao Tomita

Toru Hoshi

Katsuyuki Osako

Tadasuke Nishioka

Takamitsu Himeno

Takashi Shiraishi

Raju Mohan

Masaya Kawano

Matthew A Williams

Hideo Mori

Richard Martin

John M Nuss

Hiroshi Nakagawa

Toyotaka Yoshida

Katsuya Yamashita

Hideaki Arita

Toshihiko Miyake

Hideki Nagao

Takashi Yoshimoto

Tie-Lin Wang

Takao Kuroiwa

Makoto Ozaki

Takashi Goto

Tomoaki Inoue

Eigo Katou

Toshiki Shirahata

Yuki Ishii

Hiroyuki Arimizu

Yutaka Ozawa

Takuzo Shigihara

Naomichi Shibata

Keigo Sakamoto

Hiroyuki Tsuruoka

Yukihide Nagayo

Tatsuya Ishizaki

Takashi Nambu

Nariaki Seike

Hideaki Nishida

Hiroshi Kanki

Yusuke Asoh

Yoichi Ueno

Juri Yoshida

Mitsuru Aiba

Rimpei Kawashita

Yuta Ishii

Akihiko Umeda

Nobuyasu Nakamura

Takeshi Yoshimi

Shinji Ogawa

Takuya Miyazawa

Seigi Yano

Takahide Matsuo

Yuya Nakahara

Yoshimi Kagimoto

Hiroshi Ogita

Tsuyoshi Homma

Toshio Sakon

Keitaro Kamata

Junji Ono

Fumiharu Takahashi

Takeshi Yasoshima

Chiaki Yasuda

Mitsushige Kubota

Hideharu Ohama

Yoh Akiyama

Shigeyoshi Umeda

Osamu Uehara

Michiya Uchida

Hiroyasu Ochiai

Byoniru An

Shinya Yoshihiro

A driving device includes: a shaft; and a cylindrical bush having an insertion hole into which the shaft can be inserted. The insertion hole includes an opening portion having an inner diameter decreasing from a first end surface toward a second end surface of the bush, and a small-diameter hole portion extending from an end of the opening portion to the second end surface. The shaft includes a shaft portion having an outer diameter smaller than an inner diameter of the small-diameter hole portion, and an abutment portion having an outer diameter greater than the inner diameter of the small-diameter hole portion. The bush has a sealing surface defining the opening portion. The abutment portion of the shaft abuts on the sealing surface of the bush in an axial direction of the insertion hole to seal a gap formed between the shaft and the bush inside the insertion hole.

Driving device, valve apparatus including the same, and link driving mechanism for turbocharger

A variable nozzle mechanism in which a nozzle mount has a first surface which has a minimum clearance in a direction of an axis with respect to a lever side facing surface in an opposing region facing the lever side facing surface in the direction of the axis, and a second surface which is disposed adjacent to the first surface in a circumferential direction of the nozzle mount and has a clearance in the direction of the axis with respect to the lever side facing surface larger than the clearance in the direction of the axis between the first surface and the lever side facing surface.

Variable nozzle mechanism and rotating machine including the same

This exhaust gas bypass device and supercharger are provided with: an actuator () for moving a driving rod () reciprocally in the axial direction of the driving rod; a coupling rod () coupled to the tip section of the driving rod (); a support shaft () rotatably supported on a housing; a coupling link (), one end section of which is rotatably coupled to the tip section of the coupling rod () via a coupling shaft () and the other end section of which is fixed to the one end section of the support shaft (); a waste gate valve () coupled to the other end section of the support shaft (); and a damping member for damping displacement between the coupling rod () and the coupling link (), whereby reliability is improved by ensuring desirable operative characteristics.

Exhaust gas bypass device and supercharger

An object is to provide a seal structure capable of reducing abrasion of a seal ring without increasing the number of components and of minimizing generation of abrasion powder. A seal structure to seal clearance between an outer peripheral surfaceof a rotary shaftand an inner peripheral surfaceof a bearing housingincludes: a first seal grooveA formed on the outer peripheral surfaceof the rotary shaft; a second seal grooveB disposed between the first seal groove and the impeller; a first seal ringto be mounted to the first seal groove; and a second seal ringto be mounted to the second seal groove. The first seal ringincludes a first-seal body portionA mounted to the first seal groove, and a first-seal protruding portionB protruding from the first-seal body portion toward the second seal ring, and being configured to be in contact with the second seal ring contacting a bearing-side wall surfaceBa of the second seal groove, in a state in which the first-seal body portion is in contact with a bearing-side wall surfaceAa of the first seal groove.

Seal structure and supercharger provided with the seal structure

A tilting pad gas bearing includes: a plurality of bearing pads disposed in a circumferential direction of a rotor; and a pivot member that swingably supports the bearing pads. Each of the bearing pads has a curved shape and includes: a pad main body supported by the pivot member; a heat insulating material layer disposed on a side of the pad main body that faces the outer circumferential surface of the rotor, and formed of a material having a thermal conductivity lower than a thermal conductivity of the pad main body; and a concave portion disposed in an outer circumferential surface on an outer circumferential side of the bearing pad in a curving direction. A base end of the pivot member is fixed to a housing, and the pivot member has a protruding portion that passes through the housing.

Tilting pad gas bearing

A rotational bodyincludes a rotational shaft, an impeller, and a nut. The impeller includes a hub portionhaving a peripheral surfaceinclined to the axial direction of the rotational shaft and having an insert holein which the rotational shaft is inserted, and a blade portion. At least one of the rotational shaft or the insert hole of the hub portion has an interference fit portionfor fit between the rotational shaft and the impeller, where the outside diameter of the rotational shaft is larger than the inside diameter of the insert hole of the hub portion. The interference fit portion is formed in a region which does not include the largest outside diameter portionB where the hub portion has a largest outside diameter, with the rotational shaft and the impeller mating with each other.

Rotational body and method for manufacturing the same

This vibration measurement device is configured to measure the balancing vibration of the cartridge, a kind of rotating machines, who has a rotor and a cartridge body to support the rotor rotatably for variable operating speed, and is provided with a rigidly fixed support structure, acceleration sensors which detect the vibration of the cartridge, and a flat spring which elastically supports the cartridge with respect to the support structure and has a variable spring constant of elastic support.

Vibration measurement device and method for high-speed rotating machines

An object is to provide a floating bush bearing device including a circumferential groove over the entire circumference of an outer peripheral surface of a floating bush while ensuring that a pressing force is applied by lubricant oil to the floating bush to reduce oscillation, as well as a turbocharger provided with the bearing device. A floating bush bearing device includes: a rotary shaft disposed rotatably inside a bearing hole of a casing; a floating bush surrounding the rotary shaft; an oil-feed hole of lubricant oil having an opening on an inner peripheral surface of the bearing hole; a plurality of communication holes formed on the floating bush, each extending between an inner peripheral surface and an outer peripheral surface of the floating bush, and disposed at intervals in a circumferential direction of the floating bush; and a circumferential groove formed on the outer peripheral surface of the floating bush or the inner peripheral surface of the bearing hole and extending over an entire circumference of the outer peripheral surface of the floating bush or the inner peripheral surface of the bearing hole, the circumferential groove passing through openings of the plurality of communication holes or facing the openings of the plurality of communication holes. The circumferential groove has a cross-sectional area which varies in accordance with a circumferential position.

Floating bush bearing device and turbocharger provided with the bearing device

A floating-bush bearing device () for rotatably supporting a rotational shaft (), includes: a floating bush () having a cylindrical shape and including a bearing hole () into which the rotational shaft () is to be inserted; and a bearing housing () which rotatably houses the floating bush (). At least one of an inner peripheral surface () of the floating bush (), an outer peripheral surface () of the floating bush (), or an inner peripheral surface () of the bearing housing () includes, in a cross section in an axial direction thereof, a plurality of land portions () having a true arc shape which is a part of a true circular shape, and a plurality of recess portions () being disposed at a position recessed from the land portions, the recess portions being configured such that a distance between the recess portions and a virtual true circular line () passing through the land portions increases in a direction opposite from a rotational direction of the rotational shaft () from end portions () of the land portions opposite from the rotational direction of the rotational shaft.

Floating bush bearing device and supercharger provided with the same

An object is to provide a centrifugal compressor in which an axial force applied from a shrink-fit impeller to a sleeve section is ensured even if the sleeve section is separated from a clamp surface in an axial direction of an attachment hole, as well as a turbocharger provided with the centrifugal compressor and a method of producing the centrifugal compressor. An inner peripheral surface of an attachment hole formed on a hub includes a clamp surface and a diameter-widening surface, and an outer peripheral surface of a sleeve section includes a diameter-reducing surface. The diameter-widening surface and the diameter-reducing surface respectively include an impeller-side contacting portion and a sleeve-side contacting portion which contact each other, and a relationship represented by an expression &#x3b8;s&#x3c;atan (d/L) is satisfied, where d is a length from an axis of the attachment hole to the sleeve-side contacting portion in a radial direction of the attachment hole, L is a length from the sleeve-side contacting portion to the clamp surface in the axial direction of the attachment hole, and &#x3b8;s is a sleeve inclination angle formed by an intersection of an axis of the sleeve section and a generatrix of a virtual cone which contacts the diameter-reducing surface at the sleeve-side contacting portion.

Centrifugal compressor, turbocharger provided with the centrifugal compressor, and method for producing the centrifugal compressor

A motor rotor structure for an electric turbo charger is manufactured at low cost with good quality by fixedly fitting, over a shaft, a rotor core having electromagnetic steel sheets pre-formed as an integrated stack. The rotor structure includes a rotor core which is rotated by a magnetic field formed by a stator in a housing; a shaft configured to rotate a compressor impeller and the rotor core together; and a bearing supporting the shaft. The rotor includes the rotor core including the electromagnetic steel sheets; a stopper portion formed at an intermediate portion of the shaft to restrict axial movement of the rotor core; and a pressing unit which presses the rotor core fitted over the shaft against the stopper portion. The pressing unit prevents a circumferential phase shift between the shaft and the rotor core by a pressing force thereof.

Motor rotor structure for electric turbo charger and method of assembling same

The present invention provides a supercharger with an electric motor having improved cooling performance for bearings, in the case of employing a grease lubrication system as a lubrication system of the bearings. A supercharger with an electric motor includes: a rotary shaft; a compressor wheel; a compressor housing for housing the compressor wheel; an electric motor including a motor rotor and a motor stator, and giving rotation force to the rotary shaft; a motor housing, for housing the electric motor; a first grease-sealed bearing for rotatably supporting the rotary shaft; and a bearing housing for housing the first grease-sealed bearing, and disposed between the compressor housing and the motor housing. Inside the bearing housing, a cooling passage through which a cooling medium flows is provided in a circumferential direction on an outer circumferential side of the first grease-sealed bearing.

Supercharger with electric motor and engine device provided with supercharger with electric motor

To provide a waste-gate valve device with a good flow-rate controllability. A waste-gate valve deviceincludes: a turbine housingprovide with a waste-gate channelthrough which exhaust gas bypasses a turbine; and a waste-gate valveto open and close an outlet of the waste-gate channel. The waste-gate valveincludes a valve bodyto open and close the outlet of the waste-gate channel, and a protrusionto be housed in the waste-gate channelwhen the valve bodycloses the outlet of the waste-gate channel. The waste-gate channelensures a maximum flow rate of exhaust gas at a time when the waste-gate valve is fully open. An area ratio of a flow-path cross-sectional area Aof the waste-gate channelto a flow-path cross-sectional area Aof a merging portion is not more than 0.2, the merging portion being a part at which exhaust gas having passed through the turbine merges. A widened portionA at which the flow-path cross-sectional area increases is disposed on the outlet of the waste-gate channel.

Waste-gate valve device

An object is to provide a variable-geometry exhaust turbine whereby it is possible to prevent deformation and damage to a nozzle support under a high temperature. A variable-geometry exhaust turbine includes: a nozzle mount, a nozzle support including a first end portion joined to the first surface of the nozzle mount, a nozzle plate including the first surface joined to the second end portion of the nozzle supportand supported so as to face the nozzle mount at a distance, and the opposite second surface facing an exhaust&#x2014;as channel through which exhaust gas flows, and a plurality of nozzle vanes supported rotatably between the nozzle mount and the nozzle plate. The nozzle support is capable of tilting along a radial direction so as to absorb a relative displacement in the radial direction between the nozzle mount and the nozzle plate due to thermal expansion.

Variable-geometry exhaust turbine

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

Growing community of inventors

Tokyo, Japan

Noriyuki Hayashi