Turbocharger

Patent metadata

Field	Value
Publication number	US-10731503-B2
Application number	US-201616082859-A
Country	US
Kind code	B2
Filing date	Mar 30, 2016
Priority date	Mar 30, 2016
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A turbocharger ( 10 ) comprising: a rotating shaft ( 14 ); a turbine wheel ( 12 ); a turbine housing ( 31 ); a scroll flowpath ( 34 ) having gas flowing therethrough that rotates and drives the turbine wheel ( 12 ); a nozzle flowpath ( 35 ) that guides gas radially inwards from the scroll flowpath ( 34 ) and supplies gas to the turbine wheel ( 12 ); and a vane ( 53 ) that adjusts the amount of gas introduced in the nozzle flowpath ( 35 ). The vane ( 53 ) comprises a guide section ( 60 ) that guides the gas flow (F) in the turbine wheel ( 12 ) radially inwards.

First claim

The invention claimed is:

1. A turbocharger comprising:
a rotating shaft extending along an axis;
a turbine wheel disposed on a first end portion side of the rotating shaft, a plurality of blades being formed at intervals in a circumferential direction on the turbine wheel;
a turbine housing accommodating the turbine wheel;
a scroll flow path formed in the turbine housing, continuing in the circumferential direction on a radially outer side of the turbine wheel, and having gas flowing therethrough that rotates and drives the turbine wheel;
a nozzle flow path that guides the gas radially inwards from the scroll flow path and supplies the gas to the turbine wheel; and
a vane that adjusts the amount of the gas introduced in the nozzle flow path,
wherein the vane includes two end portions and a guide section that guides the gas such that at least part of the flow of the gas flows radially inwards on a trailing edge side of the blade of the turbine wheel,
the guide section is formed in a pressure surface on a side of the vane where the flow of the gas collides,
the guide section has a convex portion rising in a trailing edge portion on a downstream side in a flow direction of the gas,
the convex portion is formed such that a width-direction intermediate portion rises, in a direction away from a surface side opposite to the pressure surface, with respect to both end portions in a width direction on a trailing edge side of the pressure surface, and
the convex curved surface is formed such that a rise dimension of the width-direction intermediate portion gradually increases from an intermediate portion side toward the trailing edge side of the pressure surface.

2. The turbocharger according to claim 1 , wherein the guide section has a concave portion formed in a leading edge portion of the pressure surface on an upstream side in the flow direction and concave to the surface side opposite to the pressure surface.

Assignees

• Mitsubishi Heavy Ind Engine & Turbocharger Ltd

Inventors

• Yoshida Toyotaka
• Hoshi Toru
• Dammoto Yosuke
• Akiyama Yoji

Classifications

• F02C6/12

  Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure · CPC title

• F01D17/165 Primary

  for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line (F01D17/167 takes precedence) · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F01D5/048

  Form or construction · CPC title

• F05D2220/40

  in turbochargers · CPC title