Device for separating lubricating oil streams, and turbocharger comprising such a device

Abstract

The device is used to separate lubricating oil streams within a bearing housing (10), which receives lubricating oil, of a turbocharger, which comprises an axial turbine and which has a shaft (11) that is led from a compressor housing to a turbine housing through the bearing housing, two radial bearings (12, 13) arranged along the shaft, and a shaft axial bearing (14) which can be found between the radial bearings. The device comprises at least one wall projection (40) which projects from an inner wall of the bearing housing radially inwards in the direction of the shaft into an intermediate space (17) of the bearing housing. The intermediate space (17) extends between the axial bearing (14) and the turbine-side radial bearing (13) and tapers in the axial direction towards the turbine side. Lubricating oil which is transported from the axial bearing (14) and which strikes bearing housing wall sections surrounding the axial bearing is redirected by the wall protrustion and is guided inthe direction of the space which can be found below the shaft. In this manner, large quantities of lubricating oil transported from the axial bearing (14) are prevented from flowing to the seat of theturbine-side radial bearing (13) and there, at the location of the sharpest taper of the intermediate space (17), blocking the discharge of the smaller oil quantities transported through the turbine-side radial bearing. The invention likewise relates to a turbocharger comprising such a device.

Description

technical field [0001] The invention relates to the field of exhaust gas turbochargers. [0002] The invention relates to a device for separating a lubricating oil flow in an oil-containing bearing housing of an exhaust gas turbocharger and to an exhaust gas turbocharger with such a device. [0003] Exhaust gas turbochargers use the exhaust gas of the internal combustion engine in order to compress the combustion air to be supplied to the internal combustion engine. By precompressing or supercharging the combustion air, the charge quantity and thus also the fuel mixture in the cylinder of the engine are increased, so that a considerable increase in the efficiency of the engine can be achieved. Exhaust gas turbochargers used in this connection generally consist of a rotor consisting of a turbine wheel (Turbinenrad, sometimes called a turbine rotor), a compressor wheel (Verdichterrad, sometimes called a compressor rotor) and the Composed of connected shafts), bearings and fixe...

AI Technical Summary

Problems solved by technology

This leads to oil blockage on the turbine side of the bearing housing and can lead to leakage relative to the turbine housing

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