Turbocharger shroud with cross-wise grooves and turbocharger incorporating the same

Patent metadata

Field	Value
Publication number	US-9683442-B2
Application number	US-201314395281-A
Country	US
Kind code	B2
Filing date	Apr 11, 2013
Priority date	Apr 23, 2012
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A turbocharger ( 5 ) comprising a housing ( 10 ) including a compressor shroud ( 14 ) and a turbine shroud ( 12 ). A compressor wheel ( 18 ) is disposed in the compressor shroud ( 14 ) and includes a plurality of compressor blades ( 45, 46 ). Each compressor blade ( 45, 46 ) includes a leading edge ( 50, 51 ) and a compressor shroud contour edge ( 54, 55 ), wherein each compressor shroud contour edge ( 54, 55 ) is in close confronting relation to the compressor shroud ( 14 ). A turbine wheel ( 16 ) is disposed in the turbine shroud ( 12 ) and includes a plurality of turbine blades ( 26 ). Each turbine blade ( 26 ) includes a leading edge ( 30 ) and a turbine shroud contour edge ( 34 ), wherein each turbine shroud contour edge ( 34 ) is in close confronting relation to the turbine shroud ( 12 ). At least one of the compressor shroud ( 14 ) and turbine shroud ( 12 ) includes a plurality of grooves ( 70, 72 ) extending cross-wise with respect to the corresponding compressor or turbine shroud contour edges ( 34, 54, 55 ).

First claim

What is claimed is:

1. A turbocharger ( 5 ), comprising:
a housing ( 10 ) including a compressor shroud ( 14 ) and a turbine shroud ( 12 );
a compressor wheel ( 18 ) disposed in the compressor shroud ( 14 ) and including a plurality of compressor blades ( 45 , 46 ), each compressor blade ( 45 , 46 ) including a leading edge ( 50 , 51 ) and a compressor shroud contour edge ( 54 , 55 ), wherein each compressor shroud contour edge ( 54 , 55 ) is in close confronting relation to the compressor shroud ( 14 );
a turbine wheel ( 16 ) disposed in the turbine shroud ( 12 ) and including a plurality of turbine blades ( 26 ), each turbine blade ( 26 ) including a leading edge ( 30 ) and a turbine shroud contour edge ( 34 ), wherein each turbine shroud contour edge ( 34 ) is in close confronting relation to the turbine shroud ( 12 ); and
wherein at least one of the compressor shroud ( 14 ) and turbine shroud ( 12 ) includes a plurality of grooves ( 70 , 72 ) extending cross-wise with respect to the corresponding compressor or turbine shroud contour edges ( 34 , 54 , 55 ).

2. The turbocharger ( 5 ) according to claim 1 , wherein the plurality of grooves ( 70 , 72 ) are equally spaced.

3. The turbocharger ( 5 ) according to claim 1 , wherein the grooves ( 70 , 72 ) have a rectangular cross-section.

Assignees

• Borgwarner Inc

Inventors

• Dextraze Stephanie
• Grabowska David G

Classifications

• F01D5/048

  Form or construction · CPC title

• F04D25/04

  the pump being fluid-driven {(pumps driven by exhaust gases F02B37/00, F02B39/00; turbochargers F02C6/12)} · CPC title

• F01D5/143 Primary

  Contour of the outer or inner working fluid flow path wall, i.e. shroud or hub contour · CPC title

• F04D29/4206

  especially adapted for elastic fluid pumps · CPC title

• Y10S415/914

  Device to control boundary layer · CPC title