Turbo Systems Switzerland Ltd.

Abb Schweiz Ag

Abb Turbo Systems Ag

Christian Kreienkamp

Bruno Ammann

Florian Maurer

Daniel Bernhard Rusch

Antje Hertel

Matthias Jarusel

Marcel Joho

Philippe Achtnich

Armin Reichl

Andrea Vacca

Thomas Rechin

William Gizzi

Reiner Probst

Daniel Oeschger

Alessandro Sofia

Daniel Kästli

Markus Städeli

The invention relates to a turbocharger which contains a bearing device which is arranged between a compressor and a turbine and which is designed to support a shaft. This bearing device has a bearing housing, in which an oil-lubricated bearing for supporting the shaft is arranged. The shaft has a slinger element extending in the circumferential direction for centrifugally dispersing lubricating oil. The bearing housing has an oil drainage channel for discharging the lubricating oil from the bearing housing. The inner region of the bearing housing forms an oil delimitation chamber, which is sealed off by seals arranged between the shaft and the bearing housing. The oil delimitation chamber has a deflection means which is formed in such a way that, during operation of the turbocharger, lubricating oil that is centrifugally dispersed by the slinger element is deflected by the deflection means and is conducted in the opposite direction to the seals. The oil delimitation chamber is formed in the vicinity of the slinger element in such a way that the lubricating oil centrifugally dispersed by the slinger element during operation of the turbocharger can be transferred directly from said slinger element to the deflection means. A collection channel prevents lubricating oil centrifugally dispersed from the slinger element from flowing back into the seal region. The slinger element is formed in such a way that the lubricating oil sprayed away from the slinger element has a radial and an axial directional component, and the axial directional component runs in the opposite direction to the seals.

Turbocharger having improved shaft seal

An exhaust turbocharger including a modular bearing designed for bearing a shaft and arranged between a compressor and a turbine is provided herein. The bearing has a bearing housing having a receptacle chamber, wherein a bearing assembly module can be or is installed in the receptacle chamber and can be non-destructively removed. The receptacle chamber is sized such that either a bearing assembly module having a rolling bearing or a bearing assembly module having a slide bearing can be installed. The receptacle chamber has an interface, designed to contact the bearing flange of a bearing assembly module inserted into the receptacle chamber. The interface is designed to connect an oil gallery passing through the bearing housing to one or more oil galleries passing through a bearing flange of the bearing assembly module.

Exhaust turbocharger having a bearing assembly module

A radial bearing arrangement of an exhaust gas turbocharger for mounting a shaft in a bearing housing is disclosed. The radial bearing arrangement comprises a radial bearing bush arranged between the shaft and the bearing housing, wherein the radial bearing bush features a radially outwardly projecting collar, which interacts in the axial direction with an axial stop on the bearing housing. The geometry of the radially outwardly projecting collar is interrupted by cut-outs, such that a force acting on the collar as a result of an oil feed pressure is minimized, and wherein the radial bearing bush is configured such that a lubricating film can form between an end surface of the radial bearing bush and a counterpiece arranged on the shaft.

Plain bearing with hydrodynamic axial securing

The present disclosure relates to a diffuser for a radial compressor. The diffuser may comprise a diffusor duct portion formed by first and second side walls that are arranged so as to diverge at least partially from one another in a direction of flow, a blade ring having a number of blades arranged at least partially in the diffusor duct portion with each blade having a pressure side and a suction side delimited by a blade leading edge and by a blade trailing edge of the respective blade, a number of pressure equalizing openings incorporated into at least one of the first and second side walls of the diffuser duct portion in a region where the first and second side walls diverge from one another with each of the pressure equalizing openings being arranged between the pressure side of one blade and the suction side of an adjacent blade of the blade ring, and a first annular duct arranged behind the pressure equalizing openings and fluidically connected to the diffuser duct portion via at least two of the pressure equalizing openings, such that a number of regions between two adjacent blades of the blade ring in the diffuser duct portion are fluidically connectable together.

Diffuser for a radial compressor

Growing community of inventors

Bad Säckingen, Germany

Christian Kreienkamp