Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Hiroyuki Arimizu

Yasuaki Jinnai

Naoto Tashiro

Takashi Arai

Koen Kramer

Takao Yokoyama

Isao Tomita

Yosuke Dammoto

Noriyuki Hayashi

Yasunori Watanabe

Ryoji Okabe

Yoji Akiyama

Toru Hoshi

Eigo Katou

Keigo Sakamoto

Takamitsu Himeno

Nariaki Seike

Yukihide Nagayo

Shigeyoshi Sakuma

Toshio Sakon

Mitsuru Aiba

A variable nozzle device includes: a first plate-shaped member having a first plate portion having an annular shape and being fixed to a bearing housing; a second plate-shaped member having a second plate portion which has an annular shape and which defines a nozzle flow passage between the first plate portion and the second plate portion, the second plate portion having a surface disposed so as to face the first plate portion and another surface disposed so as to face at least partially a scroll flow passage formed inside a turbine housing; at least one nozzle support having, with respect to an axial direction of the nozzle support, an end coupled to the first plate portion and another end coupled to the second plate portion; at least one nozzle vane rotatably supported between the first plate portion and the second plate portion; and a variable nozzle mechanism configured to change a vane angle of the at least one nozzle vane. The second plate portion is formed to have a larger thickness than the first plate portion.

Variable nozzle device and variable-geometry type exhaust turbocharger

This impeller cover is provided with: a machinable abradable seal section which has a shroud surface, which faces the outer peripheral surface of an impeller rotating about its axis, and which provides a seal between the outer peripheral surface and the shroud surface; a cover body which covers the impeller from the outside and which has a seal housing section for housing the abradable seal section therein; and a filling material which is interposed between the abradable seal section and the cover body. The seal housing section has a fitting inner peripheral surface which is extended along the axis in order for the outer peripheral surface of the abradable seal section to fit thereto, a reference surface which is used for axial positioning of the abradable seal section by being brought into contact with the abradable seal section from one side in an axial direction, and a capturing part which forms a gap in at least at a part of the section between the abradable seal section and the seal housing section in order to capture any excess filling material.

Impeller cover, rotary machine, and impeller cover manufacturing method

A variable displacement exhaust turbocharger is provided with a plurality of nozzle vanes that are rotatably supported by a nozzle mount, a drive ring that is interlocked with an actuator and fits to a guide part of the nozzle mount, a lever plate having one end coupled to the drive ring and the other end coupled to the nozzle vane, and a variable nozzle mechanism that varies the vane angle of the nozzle vane by rotating the drive ring. A bulge suppressing portion is provided for absorbing bulging occurring on an outer peripheral surface of the guide part, the bulging being caused by the press-fitting of a nail pin into a press-fitting hole in a direction slightly toward the rotational axis with respect to the guide section and following the axial direction of the nozzle mount.

Variable displacement exhaust turbocharger equipped with variable nozzle mechanism

It is intended to provide a seal ring mounting method for a turbocharger and a turbocharger with the seal ring, whereby the seal ring is less likely to be affected by other parts. An annular protrusion () for restricting a position of a seal ring () in the radial direction is provided at a tip portion () of an inner peripheral wall () of a turbine housing (), and the seal ring () is mounted between a side surface () of a nozzle plate () and a first step portion () of the tip portion () of the inner peripheral wall () so that the outer periphery of the seal ring () is restrained by the annular projection ().

Seal ring mounting method for turbocharger, and turbocharger

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

A turbine housing assembly includes a plurality of constituent members connected to one another and easily manufactured. The turbine housing assembly includes a scroll part, an annular lid part, an exhaust gas outlet and a connection part connectable to a bearing housing for a turbine shaft. The scroll part and the connection part are each formed of a single piece of sheet metal and each is welded to the annular lid part that is orthogonal to a turbine axial direction so that the scroll part and the connection part are connected to each other via the annular lid part. Such a turbine housing assembly is of reduced weight, is quite easy to manufacture, of reduced cost, and can be made, at least in part, of materials having lower heat capacity as compared to conventional turbine housings made of sheet metal.

Turbine housing assembly and manufacturing method of turbine housing assembly

A stopperis provided with: a nut-receiving partprovided on a heat insulation platethat is attached to an actuator bracket; and a movable-side stopper partprovided on an actuator rodthat moves in relation to the heat insulation plate. An actuatoris provided with an actuator bodythat generates driving force, and the actuator rodwhich transmits the driving force from the actuator body. The movable-side stopper partis provided on the actuator rodthat extends from the actuator bodyto the nozzle vane side.

Stopper structure for regulating opening degree of nozzle vane in turbocharger

It is provided with: a variable nozzle mechanism for regulating a flow of exhaust gas to a turbine rotor; a link mechanism for converting reciprocal displacement from an actuator that operates a variable nozzle mechanism into rotational displacement and transmitting the rotational displacement to an inner section of a bearing housing; and an engaging part for engaging an output section of the link mechanism and an input section of the variable nozzle mechanism, and the engaging part is constituted by a pin and a pin insertion slot where the pin is inserted, and a smooth surface is formed around an insertion position of the pin so as to guide a tip of the pin to the insertion position.

Variable displacement turbocharger and assembly method of variable nozzle mechanism

It is provided with: a variable nozzle mechanism section; an opening degree regulating memberfor regulating an angle of a nozzle vaneby bringing an outer peripheral surfaceof an inner cylinder of a bearing housingto which a nozzle mount is affixed and an inner peripheral surface of a lever plateinto contact; and a discharge recessfor discharging soot which accumulates in the gap between an inner peripheral end portion of the lever plate, the nozzle mount, and the bearing housingto the inner peripheral end portion of the lever plate

Opening degree regulating structure for variable nozzle mechanism and variable displacement turbocharger

It is intended to achieve weight reduction and production reduction of a nozzle mount for pivotably supporting a drive ring constituting a variable nozzle mechanism, and is characterized by: providing on an end face of a guide parta nail pinhaving a flange portion and being positioned so as to hold a drive ringof a variable nozzle mechanismto the guide partof a nozzle mountin the thrust direction, and setting the thrust-directional width of the drive ringsmaller than the width of the guide part, and providing an adjusting memberbetween the flange portion of the nail pinand the end face of the guide partto adjust a distance between the side face of the nozzle mount and the flange portion of the nail pin

An object is to provide a turbine housing assembly in which reduction of weight, facilitation of manufacture, cost-cutting, and reduction of heat capacity are further promoted compared to a conventional turbine housing made of sheet metal. A turbine housing assembly includes a plurality of constituent members connected to one another to constitute a turbine housing into which a turbine wheel is inserted. The turbine housing assembly at least includes a scroll partand an exhaust partof a tubular shape having a separate body separate from the scroll part. The scroll partis formed by processing a single piece of sheet metal so that, on a back face side of a bottom face partof the scroll part, a recess portionon which a through-hole of an exhaust gas outletB is formed and a projecting portionformed by a bottom surface of an exhaust gas flow pathA projecting toward the back face side are formed, the projecting portionsurrounding the recess portion. The recess portionof the scroll partis connected to an end portionof the exhaust partin a turbine axial direction so that the exhaust partis in communication with the exhaust gas outletB of the scroll partin a state where a gap 'a' is formed between an outer circumferential face of the exhaust partand the projecting portionof the scroll part

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Tokyo, Japan

Hiroyuki Arimizu