Turbine housing and exhaust gas turbine supercharger

Patent metadata

Field	Value
Publication number	US-9261109-B2
Application number	US-201113511060-A
Country	US
Kind code	B2
Filing date	Jul 6, 2011
Priority date	Jul 6, 2011
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A turbine housing includes an outer housing member, which has a proximal housing portion and a distal housing portion, and an inner housing member, which is provided inside the outer housing member and has a shroud surface that faces a turbine wheel in an axial direction. A distal portion of the inner housing member serves as a slide portion slidable in the axial direction. Further, a proximal portion of the inner housing member is fixed to the proximal housing portion at a part closer to a distal side than a proximal portion of the proximal housing portion. Further, a scroll portion is formed by the inner housing member and a proximal scroll portion of the proximal housing portion located closer to a proximal side than the inner housing member.

First claim

The invention claimed is:

1. A turbine housing for enclosing a turbine wheel, comprising:
an outer housing member having a proximal housing portion and a distal housing portion; and
an inner housing member provided inside the outer housing member, the inner housing member having a shroud surface, which faces a blade portion of the turbine wheel in an axial direction of the turbine wheel, wherein
a side close to a turbine shaft in the axial direction is referred to as a proximal side, and a side distant from the turbine shaft is referred to as a distal side;
a distal portion of the inner housing member is a movable portion displaceable relative to the outer housing member in the axial direction;
a proximal portion of the inner housing member is fixed to the outer housing member at a part closer to the distal side than a proximal portion of the outer housing member;
a scroll portion is formed by the inner housing member and a part of the outer housing member that is located closer to the proximal side than the inner housing member;
a distal portion of the proximal housing portion, a proximal portion of the distal housing portion, and the proximal portion of the inner housing member are joined to overlap each other and form a portion of the scroll portion; and
a joined portion, which is formed by the portion of the scroll portion, that includes: (i) the distal portion of the proximal housing portion, (ii) the proximal portion of the distal housing portion and (iii) the proximal portion of the inner housing member, the joined portion being radially overlapped with the turbine wheel.

2. The turbine housing according to claim 1 , wherein the proximal housing portion of the outer housing member is configured to cover a proximal portion of the turbine wheel and the distal housing portion of the outer housing member is provided closer to the distal side than the proximal housing portion, and the proximal housing portion and the distal housing portion are split from each other.

3. The turbine housing according to claim 2 , wherein the distal portion of the proximal housing portion, the proximal portion of the distal housing portion, and the proximal portion of the inner housing member extend in the axial direction.

4. The turbine housing according to claim 2 , wherein the proximal housing portion has a higher rigidity than the distal housing portion.

5. The turbine housing according to claim 4 , wherein the proximal housing portion and the distal housing portion are formed of the same material, and the proximal housing portion is thicker than the distal housing portion.

6. The turbine housing according to claim 2 , wherein
a supporting member for displaceably supporting the movable portion of the inner housing member is coupled to an inner peripheral surface of the outer housing member, and
a sealing member for sealing a clearance between the movable portion and the supporting member is provided between the movable portion and the supporting member.

7. The turbine housing according to claim 6 , wherein the sealing member is formed of ceramic fibers and a binding agent.

8. The turbine housing according to claim 2 , wherein the proximal housing portion, the distal housing portion, and the inner housing member are respectively formed using a metal plate.

9. The turbine housing according to claim 1 , wherein the proximal portion of the inner housing member is in direct contact with the distal portion of the proximal housing portion.

10. An exhaust gas turbine supercharger for supercharging by a turbine wheel being rotated by exhaust gas energy, comprising a turbine housing for enclosing the turbine wheel, the turbine housing including:
an outer housing member having a proximal housing portion and a distal housing portion; and
an inner housing member provided inside the outer housing member, the inner housing member having a shroud surface, which faces a blade portion of the turbine wheel in an axial direction of the turbine wheel, wherein
a side close to a turbine shaft in the axial direction is referred to as a proximal side, and a side distant from the turbine shaft is referred to as a distal side;
a distal portion of the inner housing member is a movable portion displaceable relative to the outer housing member in the axial direction;
a proximal portion of the inner housing member is fixed to the outer housing member at a part closer to the distal side than a proximal portion of the outer housing member;
a scroll portion is formed by the inner housing member and a part of the outer housing member that is located closer to the proximal side than the inner housing member;
a distal portion of the proximal housing portion, a proximal portion of the distal housing portion, and the proximal portion of the inner housing member are joined to overlap each other and form a portion of the scroll portion; and
a joined portion, which is formed by the portion of the scroll portion, that includes: (i) the distal portion of the proximal housing portion, (ii) the proximal portion of the distal housing portion and (iii) the proximal portion of the inner housing member, the joined portion being radially overlapped with the turbine wheel.

11. The turbine housing according to claim 10 , wherein the proximal portion of the inner housing member is in direct contact with the distal portion of the proximal housing portion.

Assignees

• Maeda Osamu
• Nagai Kouji
• Isogai Tomoyuki
• Matsui Hiroki
• Saeki Masanori
• Toyota Motor Co Ltd

Inventors

• Maeda Osamu
• Nagai Kouji
• Isogai Tomoyuki
• Matsui Hiroki
• Saeki Masanori

Classifications

• F04D29/40 Primary

  Casings; Connections of working fluid {(bleed or by-pass valves F04D15/0011, F04D27/0215)} · CPC title

• F02C6/12

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

• F05D2230/54

  by sheet metal manufacturing · CPC title

• F01D9/026 Primary

  Scrolls for radial machines or engines · CPC title

• F05D2220/40

  in turbochargers · CPC title