Exhaust gas turbocharger having an internally insulated turbine volute

Patent metadata

Field	Value
Publication number	US-9841033-B2
Application number	US-201414890951-A
Country	US
Kind code	B2
Filing date	Apr 30, 2014
Priority date	May 14, 2013
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A turbine housing ( 1 ) of an exhaust-gas turbocharger ( 15 ) having a turbine volute ( 7 ) which is delimited by a metallic outer shell ( 8 ) and which has an inner wall ( 9 ); and a heat insulation layer ( 10 ) which is arranged on the inner wall ( 9 ) and which has a heat insulation core ( 6 A, 6 B) which, on its surface ( 12 A, 12 B) facing into a volute interior space ( 11 ), is covered by a first sheet-metal shell ( 3 A, 3 B). The heat insulation core ( 6 A, 6 B) is covered, on a surface ( 13 A, 13 B, 13 ′B) facing toward the inner wall ( 9 ), by a second sheet-metal shell ( 4 A and 4 B respectively).

First claim

The invention claimed is:

1. A turbine housing ( 1 ) of an exhaust-gas turbocharger ( 15 ), having
a turbine volute ( 7 ) which is delimited by a metallic outer shell ( 8 ) and which has a spiral-shaped inner wall ( 9 ); and
a heat insulation layer ( 10 ) which is arranged on the inner wall ( 9 ) of the turbine volute and which has a heat insulation core ( 6 A, 6 B) comprised of a fibrous material or a ceramic material encased in a sheet-metal encasement, the encasement comprised of a first sheet-metal shell ( 3 A, 3 B) and a second sheet-metal shell ( 4 A, 4 B), wherein
the first sheet-metal shell ( 3 A, 3 B) covers the heat insulation core ( 6 A, 6 B) surface ( 12 A, 12 B) facing into a volute interior space ( 11 ),
the second sheet-metal shell ( 4 A, 4 B) covers the heat insulation core ( 6 A, 6 B) surface ( 13 A, 13 B, 13 ′B) facing toward the volute inner wall ( 9 ),
the first and second sheet-metal shells together encase the heat insulation core, and
the heat insulation layer ( 10 ) is formed as a separate component placed into the turbine volute ( 7 ),
elevations ( 5 ; 5 ′, 5 ″, 5 ′″) that project in the direction of the volute interior space ( 11 ) are arranged on the inner wall ( 9 ), and
an insulation layer ( 21 A, 21 B, 21 C) is arranged between the second sheet-metal shell(s) ( 4 A, 4 B), which faces the inner wall ( 9 ), and the inner wall ( 9 ).

2. The turbine housing as claimed in claim 1 , wherein the heat insulation layer ( 10 ) is divided into at least first and second insulation components ( 10 A, 10 B) which are joined together in the turbine volute ( 7 ).

3. The turbine housing as claimed in claim 2 , wherein the first and second insulation components ( 10 A, 10 B) each have a heat insulation core ( 6 A and 6 B respectively), wherein the first insulation component ( 10 A) is fully enclosed by associated sheet-metal shells ( 3 A, 4 A) and the second insulation component ( 10 B) is fully enclosed by associated sheet-metal shells ( 3 B, 4 B).

4. The turbine housing as claimed in claim 2 , wherein the sheet-metal shells ( 3 A, 3 B) of the first insulation component ( 10 A) are connected to one another and the sheet-metal shells ( 4 A, 4 B) of the second insulation component ( 10 B) are connected to one another.

5. The turbine housing as claimed in claim 4 , wherein the sheet-metal shells ( 3 A, 3 B) of the first insulation component ( 10 A) are welded to one another and the sheet-metal shells ( 4 A, 4 B) of the second insulation component ( 10 B) are welded to one another.

6. The turbine housing as claimed in claim 1 , wherein the heat insulation layer ( 10 ) is fixed in the volute interior space ( 11 ) by a press-on part ( 2 ).

7. The turbine housing as claimed in claim 6 , wherein the press-on part ( 2 ) is fixed to the turbine volute ( 7 ) with the interposition of a seal ( 14 ).

8. The turbine housing as claimed in claim 1 , wherein the turbine volute ( 7 ) is divided, in undercut-free fashion, into two turbine volute parts ( 7 A, 7 B) connected to one another.

9. A turbine housing ( 1 ) of an exhaust-gas turbocharger ( 15 ), having
a turbine volute ( 7 ) which is delimited by a metallic outer shell ( 8 ) and which has a spiral-shaped inner wall ( 9 ); and
a heat insulation layer ( 10 ) which is arranged on the inner wall ( 9 ) of the turbine volute and which has a heat insulation core ( 6 A, 6 B) comprised of a fibrous material or a ceramic material encased in a sheet-metal encasement, the encasement comprised of a first sheet-metal shell ( 3 A, 3 B) and a second sheet-metal shell ( 4 A, 4 B), wherein
the first sheet-metal shell ( 3 A, 3 B) covers the heat insulation core ( 6 A, 6 B) surface ( 12 A, 12 B) facing into a volute interior space ( 11 ),
the second sheet-metal shell ( 4 A, 4 B) covers the heat insulation core ( 6 A, 6 B) surface ( 13 A, 13 B, 13 ′B) facing toward the volute inner wall ( 9 ),
the first and second sheet-metal shells together encase the heat insulation core, and
the heat insulation layer ( 10 ) is formed as a separate component placed into the turbine volute ( 7 ),
elevations ( 5 ; 5 ′, 5 ″, 5 ′″) that project in the direction of the volute interior space ( 11 ) are arranged on the inner wall ( 9 ), and

an air insulation layer ( 21 A, 21 B, 21 C) is arranged between the second sheet-metal shell(s) ( 4 A, 4 B), which faces the inner wall ( 9 ), and the inner wall ( 9 ), wherein the elevations ( 5 , 5 ′, 5 ″, 5 ′″) are produced by casting or by cutting processes.

10. An exhaust-gas turbocharger ( 15 ), having
a compressor housing ( 19 );
a bearing housing ( 17 ); and
a turbine housing ( 1 ) which has:
a turbine volute ( 7 ) which is delimited by a metallic outer shell ( 8 ) and which has an inner wall ( 9 ); and

a heat insulation layer ( 10 ) which is arranged on the inner wall ( 9 ) of the turbine volute and which has a heat insulation core ( 6 A, 6 B) comprised of a fibrous material or a ceramic material encased in a sheet-metal encasement, the encasement comprised of a first sheet-metal shell ( 3 A, 3 B) and a second sheet-metal shell ( 4 A, 4 B), wherein
the first sheet-metal shell ( 3 A, 3 B) covers the heat insulation core ( 6 A, 6 B) surface ( 12 A, 12 B) facing into a volute interior space ( 11 ),
the second sheet-metal shell ( 4 A, 4 B) covers the heat insulation core ( 6 A, 6 B) surface ( 13 A, 13 B, 13 ′B) facing toward the volute inner wall ( 9 ),
the first and second sheet-metal shells together encase the heat insulation core, and
the heat insulation layer ( 10 ) is formed as a separate component placed into the turbine volute ( 7 ),
elevations ( 5 ; 5 ′, 5 ″, 5 ′″) that project in the direction of the volute interior space ( 11 ) are arranged on the inner wall ( 9 ), and
an insulation layer ( 21 A, 21 B, 21 C) is arranged between the second sheet-metal shell(s) ( 4 A, 4 B), which faces the inner wall ( 9 ), and the inner wall ( 9 ).

11. The exhaust-gas turbocharger as claimed in claim 10 , wherein the heat insulation layer ( 10 ) is divided into at least first and second insulation components ( 10 A, 10 B) which are joined together in the turbine volute ( 7 ).

12. The exhaust-gas turbocharger as claimed in claim 11 , wherein the first and second insulation components ( 10 A, 10 B) each have a heat insulation core ( 6 A and 6 B respectively), wherein the first insulation component ( 10 A) is fully enclosed by associated sheet-metal shells ( 3 A, 4 A) and the second insulation component ( 10 B) is fully enclosed by associated sheet-metal shells ( 3 B, 4 B).

13. The exhaust-gas turbocharger as claimed in claim 11 , wherein the sheet-metal shells ( 3 A, 3 B) of the first insulation component ( 10 A) are connected to one another and the sheet-metal shells ( 4 A, 4 B) of the second insulation component ( 10 B) are connected to one another.

14. The exhaust-gas turbocharger as claimed in claim 10 , wherein the heat insulation layer ( 10 ) is fixed in the volute interior space ( 11 ) by a press-on part ( 2 ).

15. The exhaust-gas turbocharger as claimed in claim 10 , wherein elevations ( 5 ; 5 ′, 5 ″, 5 ′″) that project in the direction of the volute interior space ( 11 ) are arranged on the inner wall ( 9 ).

16. The exhaust-gas turbocharger as claimed in claim 10 , wherein the turbine volute ( 7 ) is divided, in undercut-free fashion, into two turbine volute parts ( 7 A, 7 B) connected to one another.

Assignees

• Borgwarner Inc
• Isolite Gmbh

Inventors

• Henke Waldemar
• Hoecker Patric
• Muenz Stefan
• Kroll Matthias
• Loibl Werner
• Oberthuer Holger

Classifications

• F04D29/4206 Primary

  especially adapted for elastic fluid pumps · CPC title

• F04D29/582

  specially adapted for elastic fluid pumps · CPC title

• F01D25/145 Primary

  Thermally insulated casings · CPC title

• F05D2220/40

  in turbochargers · CPC title