VARIABLE GEOMETRY TURBOCHARGER

• US 20130149129A1
• Filed: 02/24/2011
• Published: 06/13/2013
• Est. Priority Date: 02/25/2010
• Status: Abandoned Application

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: Matsuyama, Yoshimitsu, Inoue, Tomohiro, Sakai, Yasutaka
• Application Number:
  US13/522,047
• Publication Number:
  US 20130149129A1
• Time in Patent Office: Days
• US Class Current: 415/208.1
• 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 25/24 Casings modified for heating or cooling F01D25/14; Casing parts, e.g. diaphragms, casing fastenings casings for rotary machines or engines in general F16M ; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045
• CPC Class Codes: F02B 37/24 by using pumps or turbines with adjustable guide vanes
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: F05D 2240/58 Piston ring seals

Abstract

An exhaust nozzle 9 has nozzle vanes 15 interposed between front and rear exhaust introduction walls 10 and 51. A space 19 is between the wall 51 and a turbine housing 1. A sealing device 25 is arranged upstream, in a direction of exhaust gas, of each through hole 24 provided in the wall 51 for penetration of a vane shaft 16a to prevent exhaust gas in a scroll passage 8 from leaking through the space 19 to a turbine impeller 4. Each of the walls 10 and 51 is disk-shaped, the turbine housing 1 being formed with a shoulder 50 to which the wall 51 is fitted with the space 19.

Claims

1. A variable geometry turbocharger with an exhaust nozzle having nozzle vanes interposed between front and rear exhaust introduction walls, a space being between said rear exhaust introduction wall and a turbine housing, a sealing device being arranged upstream, in a direction of exhaust gas, of each through hole provided in said rear exhaust introduction wall for penetration of a vane shaft to prevent exhaust gas in a scroll passage from leaking through said space to a turbine impeller, wherein each of said front and rear exhaust introduction walls is disk-shaped, said turbine housing being formed with a shoulder to which the disk-shaped rear exhaust introduction wall is fitted with said space.

2. The variable geometry turbocharger as claimed in claim 1, wherein said front and rear exhaust introduction walls are equivalent in linear expansion coefficient.

3. The variable geometry turbocharger as claimed in claim 1, wherein said sealing device comprises sealing piston rings.

4. The variable geometry turbocharger as claimed in claim 1, wherein said sealing device comprises a disk spring seal.