Exhaust-gas turbocharger

Patent metadata

Field	Value
Publication number	US-9932896-B2
Application number	US-201013511348-A
Country	US
Kind code	B2
Filing date	Dec 3, 2010
Priority date	Dec 16, 2009
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

The invention relates to an exhaust-gas turbocharger ( 1 ) having a compressor housing ( 3 ), having a bearing housing ( 28 ) which can be connected at one end to the compressor housing ( 3 ) by means of a first fastening device ( 19 ), and having a turbine housing ( 2 ) which can be connected to the bearing housing ( 28 ) at the other end of the latter by means of a second fastening device ( 20 ), with the compressor housing ( 3 ), the bearing housing ( 28 ) and the turbine housing ( 2 ) extending along an exhaust-gas turbocharger longitudinal axis (R), wherein the first fastening device ( 19 ) is designed as a plug-and-twist connecting device.

First claim

The invention claimed is:

1. An exhaust-gas turbocharger ( 1 ), the turbocharger ( 1 ) comprising:
a compressor housing ( 3 ) surrounding a compressor wheel, the compressor wheel adapted to drawing air in axially and discharging air radially, the compressor wheel further having a backwall, the compressor housing ( 3 ) comprising
a compressor inlet for intake of air axially upstream of the compressor wheel and
a compressor outlet for discharge of compressed air radially downstream of the compressor wheel,
a bearing housing cover plate adjacent the backwall of the compressor wheel,

a bearing housing ( 28 ) having a first end and a second end, and connected to the compressor housing ( 3 ) at the bearing housing first end via a first fastening device ( 19 ), wherein the first fastening device ( 19 ) is a plug-and-twist connecting device, and
a turbine housing ( 2 ) connected to the bearing housing ( 28 ) second end via a second fastening device ( 20 ), with the compressor housing ( 3 ), the bearing housing ( 28 ) and the turbine housing ( 2 ) extending along an exhaust-gas turbocharger longitudinal axis (R),
wherein the first fastening device ( 19 ) has a first fastener ring ( 21 ) which is arranged on the compressor housing ( 3 ) and which has first locking teeth ( 22 ) which point toward the exhaust-gas turbocharger longitudinal axis (R) and which are arranged spaced apart from one another, and a second fastener ring ( 23 ) which is arranged on the bearing housing ( 28 ) and which has second locking teeth ( 24 ) which point away from the exhaust-gas turbocharger longitudinal axis (R) and which are complementary to the first locking teeth ( 22 ) and which are arranged spaced apart from one another.

2. The exhaust-gas turbocharger as claimed in claim 1 , wherein the first fastener ring ( 21 ) is formed in one piece with the compressor housing ( 3 ).

3. The exhaust-gas turbocharger as claimed in claim 2 , wherein the first fastener ring ( 21 ) and the second fastener ring ( 23 ) are formed from the housing blanks of the compressor housing ( 3 ) and of the bearing housing ( 28 ) respectively via a milling and turning process.

4. The exhaust-gas turbocharger as claimed in claim 1 , wherein the second fastener ring ( 23 ) is formed in one piece with the bearing housing ( 28 ).

5. The exhaust-gas turbocharger as claimed in claim 1 , wherein the first fastener ring ( 21 ) and the second fastener ring ( 23 ) are formed as separate parts which can be connected to the compressor housing ( 3 ) and to the bearing housing ( 28 ) respectively.

6. The exhaust-gas turbocharger as claimed in claim 1 , wherein the first fastening device ( 19 ) is provided with a securing pin ( 27 ) for preventing the release of the connection between the bearing housing ( 28 ) and compressor housing ( 3 ).

7. The exhaust-gas turbocharger as claimed in claim 6 , wherein the securing pin ( 27 ) is provided with an indicator ( 29 ).

8. The exhaust-gas turbocharger as claimed in claim 1 wherein the first fastening device ( 19 ) is a bayonet connection.

9. An exhaust-gas turbocharger ( 1 ), the turbocharger ( 1 ) comprising:
a compressor housing ( 3 ) surrounding a compressor wheel, the compressor wheel adapted to drawing air in axially and discharging air radially, the compressor wheel further having a backwall, the compressor housing ( 3 ) comprising
a compressor inlet for intake of air axially upstream of the compressor wheel and
a compressor outlet for discharge of compressed air radially downstream of the compressor wheel,
a bearing housing cover plate adjacent the backwall of the compressor wheel,

a bearing housing ( 28 ) having a first end and a second end, and connected to the compressor housing ( 3 ) at the bearing housing first end via a first fastening device ( 19 ), wherein the first fastening device ( 19 ) is a plug-and-twist connecting device, and
a turbine housing ( 2 ) connected to the bearing housing ( 28 ) second end via a second fastening device ( 20 ), with the compressor housing ( 3 ), the bearing housing ( 28 ) and the turbine housing ( 2 ) extending along an exhaust-gas turbocharger longitudinal axis (R),
wherein the first fastening device ( 19 ) is a plug-and-twist connecting device wherein the first fastening device ( 19 ) has a first fastener ring ( 21 ) which is arranged on the compressor housing ( 3 ) and which has first locking teeth ( 22 ) which point toward the exhaust-gas turbocharger longitudinal axis (R) and which are arranged spaced apart from one another, and a second fastener ring ( 23 ) which is arranged on the bearing housing ( 28 ) and which has second locking teeth ( 24 ) which point away from the exhaust-gas turbocharger longitudinal axis (R) and which are complementary to the first locking teeth ( 22 ) and which are arranged spaced apart from one another, and
wherein at least one of the first locking teeth ( 22 ) and second locking teeth ( 24 ) is provided with a run-on bevel ( 25 ).

Assignees

• Lischer Thomas
• Borgwarner Inc

Inventors

• Lischer Thomas

Classifications

• F05D2260/30

  Retaining components in desired mutual position · CPC title

• F01D25/246

  Fastening of diaphragms or stator-rings · CPC title

• F05D2260/33

  with a bayonet coupling · CPC title

• F05D2230/60

  Assembly methods · CPC title

• F01D9/026

  Scrolls for radial machines or engines · CPC title