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Exhaust turbocharger

An exhaust turbine and supercharger technology, which is applied in the directions of gas turbine devices, lubrication of turbine/propulsion devices, and cooling of turbine/propulsion devices, etc. Body leak volume, etc.

Inactive Publication Date: 2016-05-25
BOSCH MAHLE TURBO SYST GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has detrimental effects such as increased blow-by volume into the bearing housing, increased heat introduced into the bearing housing, increased oil coking in the area of ​​the turbine side shaft seal and / or reduced turbine efficiency due to incorrect flow
On the other hand, too narrow a gap between the turbine and the heat shield results in an outwardly acting suction force in the gap, which can cause oil to leak from the bearing housing

Method used

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  • Exhaust turbocharger
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Examples

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Embodiment Construction

[0027] figure 1 The illustrated exhaust-gas turbocharger 10 has a housing 12 which is divided into a compressor housing 14 , a bearing housing 16 and a turbine housing 18 . A rotor 20 of the turbocharger 10 is mounted in the bearing housing 16 . The rotor 20 has a compressor wheel 22 and a turbine wheel 24 held rotatably fixed on a shaft 26 which is itself mounted in the bearing housing 16 about an axis of rotation 28 . The exhaust gas turbocharger 10 , referred to simply as a turbocharger, is used to supercharge the internal combustion engine. In doing so, energy from the exhaust gas flow of the internal combustion engine is used to compress the fresh air provided to the internal combustion engine for combustion. For this purpose, the turbine 24 is driven by the exhaust gas flow. Because the turbine 24 is rotationally fixedly connected to the axis of rotation 28 and the compressor wheel 22 is also connected to the axis of rotation 28 , the turbine 24 drives the compressor ...

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PUM

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Abstract

The invention relates to an exhaust turbocharger with a turbine (24) which is driven by an exhaust stream; a bearing shell (16), in which a shaft (26) of the exhaust turbocharger (10) is arranged to rotate around an axis of rotation (28); and a heat shield (30) which is arranged between a turbine rear side (32) and the bearing shell (16). The invention is characterized in that an annular gap (36) is arranged between the turbine (24) and the heat shield (30), on the other hand, the heat shield (30) is designed and / or arranged such that a stable air barrier film (50) is formed in a sealing area (38) between the heat shield (30) and turbine rear side (32).

Description

technical field [0001] The invention relates to an exhaust-gas turbocharger having a turbine driven by the exhaust gas flow, a bearing housing in which the shaft of the exhaust-gas turbocharger is mounted so as to be able to rotate around it, and a heat shield The axis rotates, and the heat shield is arranged between the turbine rear side of the turbine and the bearing housing. Background technique [0002] It is known to use, in order to protect components from heat radiation or high-temperature flows, constructions called heat shields with air gaps behind them. This configuration is also used in exhaust turbochargers, for example, in order to protect the bearing housing from the flow of hot exhaust gases over the turbine. If, in the case of an exhaust-gas turbocharger, the gap between the turbine and the heat shield is too large, a high exhaust gas mass flow flows into the gap behind the turbine at relatively high pressure. This has detrimental effects such as increased ...

Claims

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Application Information

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IPC IPC(8): F01D25/08F02B37/00
CPCF02C7/06F02C6/12F02C7/18F02C7/24F05D2220/40F01D25/08F02B37/00
Inventor 斯特芬·施米特马克·温特斯特芬·海涅曼
Owner BOSCH MAHLE TURBO SYST GMBH & CO KG