Bearing housing of an exhaust-gas turbocharger

Patent metadata

Field	Value
Publication number	US-10066503-B2
Application number	US-201214360962-A
Country	US
Kind code	B2
Filing date	Nov 28, 2012
Priority date	Dec 9, 2011
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A bearing housing ( 1 ) of an exhaust-gas turbocharger ( 2 ) having a turbine-side flange ( 3 ), having a compressor-side flange ( 4 ) and having a center part ( 5 ) which is arranged between the turbine-side flange ( 3 ) and the compressor-side flange ( 4 ). The turbine-side flange ( 3 ), the compressor-side flange ( 4 ) and the center part ( 5 ) are separate components which are connected to one another in the fully assembled state by a connection device ( 6 ) or thermally or by adhesive bonding.

First claim

The invention claimed is:

1. A bearing housing ( 1 ) of an exhaust-gas turbocharger ( 2 ) having
a turbine-side flange ( 3 );
a compressor-side flange ( 4 ); and
a center part ( 5 ) which is arranged between the turbine-side flange ( 3 ) and the compressor-side flange ( 4 ),

wherein
the turbine-side flange ( 3 ) and the compressor-side flange ( 4 ) are radial flanges extending radially beyond the center part ( 5 ),
the turbine-side flange ( 3 ), the compressor-side flange ( 4 ) and the center part ( 5 ) are separate components which are connected to one another in the fully assembled state by means of a connection device ( 6 ), and
the center part ( 5 ) includes
an outer part ( 7 ) forming an outer surface of the bearing housing center part and having a guide bush ( 9 ) internally, the guide bush ( 9 ) having a radially outer surface and a radially inner surface,
a bearing support ( 8 ) having a radially outer surface and a radially inner surface, wherein the bearing support ( 8 ) is inserted into the guide bush ( 9 ) of the outer part ( 7 ) and which has oil slots ( 14 A, 14 B),
an oil inlet bush ( 20 ) extending through an opening ( 17 ) in the outer part ( 7 ) and in communication with the oil slots ( 14 A, 14 B) in the bearing support ( 8 ), and
an oil outlet bush ( 21 ) extending through an opening ( 17 ′) in the outer part ( 7 ) and in communication with the oil slots ( 14 A, 14 B) in the bearing support ( 8 ),

such that said oil inlet bush ( 20 ), a space between said outer part ( 7 ) guide bush ( 9 ) radially inner surface and said bearing support ( 8 ) radially outer surface, said oil slots ( 14 A, 14 B), and said oil outlet bush ( 21 ) cooperate to define an oil lubrication flow path.

2. The bearing housing as claimed in claim 1 , wherein the guide bush ( 9 ) has at least one guide rib ( 10 , 11 ) which, in the fitted state of the bearing support ( 8 ), engages into a guide groove ( 12 , 13 ) in the bearing support ( 8 ).

3. The bearing housing as claimed in claim 2 , wherein the outside of the guide bush ( 9 ) is provided with a cooling fin arrangement ( 15 ).

4. The bearing housing as claimed in claim 2 , wherein the guide bush ( 9 ) is held in a supporting frame ( 21 ) of the outer part ( 7 ) by way of a web arrangement ( 16 ).

5. The bearing housing as claimed in claim 4 , wherein the center part ( 5 ) is provided with ports ( 18 , 19 ) and water feed lines ( 18 , 19 ).

6. The bearing housing as claimed in claim 1 , wherein the outside of the bearing support ( 8 ) is provided with a cooling fin arrangement ( 14 ).

7. The bearing housing as claimed in claim 1 , wherein the outer part and bearing support are aluminum.

8. The bearing housing as claimed in claim 1 , wherein the connection device ( 6 ) is a screwed connection.

9. The bearing housing as claimed in claim 8 , wherein the screwed connection ( 6 ) has tie rods ( 6 A, 6 B).

10. The bearing housing as claimed in claim 1 , wherein the connection device ( 6 ) between the center part ( 5 ) outer part ( 7 ) and bearing support ( 8 ) and turbine-side flange ( 3 ), the compressor-side flange ( 4 ) is in the form of a thermal connection device or of a form-fitting device.

Assignees

• Borgwarner Inc

Inventors

• Friedrich Peter

Classifications

• F05D2240/50

  Bearings · CPC title

• F16C37/00

  Cooling of bearings · CPC title

• F01D25/24

  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 title

• F05D2220/40

  in turbochargers · CPC title

• F01D25/16 Primary

  Arrangement of bearings; Supporting or mounting bearings in casings (bearings per se F16C) · CPC title