Turbocharger

• US 20150104303A1
• Filed: 12/17/2014
• Published: 04/16/2015
• Est. Priority Date: 06/29/2012
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: VELTHUIS, Jan
• Granted Patent: US 9,963,983 B2
• Time in Patent Office: Days
• US Class Current: 415/209.3
• 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: F01D 25/246 Fastening of diaphragms or stator-rings
• CPC Class Codes: F01D 9/04 forming ring or sector
• CPC Class Codes: F02B 37/025 Multiple scrolls or multiple gas passages guiding the gas to the pump drive
• CPC Class Codes: F02B 39/00 Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
• CPC Class Codes: F02C 6/12 Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
• CPC Class Codes: F04D 25/04 the pump being fluid-driven pumps driven by exhaust gases F02B37/00, F02B39/00; turbochargers F02C6/12
• CPC Class Codes: F04D 29/4206 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/441 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/547 having a special shape in order to influence fluid flow
• CPC Class Codes: F04D 29/624 especially adapted for elastic fluid pumps
• CPC Class Codes: F05D 2220/40 in turbochargers

Abstract

A turbocharger for an internal combustion engine having a housing, an impeller arranged in the housing interior having an impeller shaft and being mounted in a bearing block, and an intermediate element between the impeller and the bearing block. The housing includes at least one flow channel for feeding or discharging a fluid to or from the impeller, and the intermediate element includes a wall section that delimits a least a section of at least one of the flow channels.

Claims

1. An exhaust gas turbocharger for an internal combustion engine, comprising:

a housing having a housing interior that is at least partially enclosed by the housing;

an impeller with an impeller shaft disposed in the housing interior and rotatably mounted in a bearing block,

wherein

the housing includes at least one flow channel configured to supply fluid to, or discharge fluid from, the impeller,

an intermediate element is disposed coaxially to the impeller shaft between the impeller and the bearing block, and

at least a section of the intermediate element forms a wall delimiting at least a section of at least one of the at least one flow channels.

2. The exhaust gas turbocharger according to claim 1, wherein

the intermediate element has a disk-shaped extension extending substantially radially to the impeller shaft forming the wall.

3. The exhaust gas turbocharger according to claim 2, wherein

the disk-shaped extension has an outer diameter larger than an outer diameter of the impeller.

4. The exhaust gas turbocharger according to claim 3, wherein

the disk-shaped extension has an outer diameter larger than an inner diameter of a partition of at least one of the at least one flow channels.

5. An exhaust gas turbocharger according to claim 4, wherein

each of the at least one flow channels has a spiral shape and is aligned in a plane oriented substantially radially to the impeller shaft.

6. An exhaust gas turbocharger according to claim 5, wherein

the intermediate element is configured to be at least one of radially positioned on a corresponding radial support surface of the housing, axially positioned on a corresponding axial support surface of the housing, and supported on the bearing block.

7. An exhaust gas turbocharger according to claim 6, wherein

the intermediate element includes an axial stop configured to axially fix the intermediate element relative to the housing.

8. An exhaust gas turbocharger according to claim 4, wherein

the intermediate element is crucible shaped and is configured for axial insertion into the housing interior such that when fully inserted a section of disk-shaped extension of the intermediate element forming the wall section is flush with an adjacent wall of the at least one of the at least one flow channels.

9. An exhaust gas turbocharger according to claim 2, wherein

the disk-shaped extension includes a circumferential peripheral seal between the intermediate element and the housing.

10. An exhaust gas turbocharger according to claim 1, wherein

the intermediate element is a shielding element between the impeller and the bearing block.