Turbocharger

• US 10,731,503 B2
• Filed: 03/30/2016
• Issued: 08/04/2020
• Est. Priority Date: 03/30/2016
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Inventors: Yoshida, Toyotaka, Hoshi, Toru, Dammoto, Yosuke, Akiyama, Yoji
• Primary Examiner(s): Verdier, Christopher
• Application Number:
  US16/082,859
• Publication Number:
  US 20190101018A1
• Time in Patent Office: 1,588 Days
• CPC Class Codes: F01D 17/165 for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line F01D17/167 takes precedence
• CPC Class Codes: F01D 5/048 Form or construction
• CPC Class Codes: F02B 37/24 by using pumps or turbines with adjustable guide vanes
• CPC Class Codes: F02C 6/12 Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

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.

Claims

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.