Bmts Technology Gmbh &co. Kg

Konzelmann Gmbh

Berger, Martin

Martin Berger

Rüdiger Kleinschmidt

Steffen Schmitt

Oliver Kuhne

Frieder Stetter

Martin Kropp

Jörg Jennes

Ruediger Kleinschmidt

Andreas Laage

Milko Konzelmann

Thomas Bahret

The invention relates to an exhaust gas turbocharger having a hydrodynamic plain bearing or a hydrodynamic plain bearing, comprising a rotor () and a counter-bearing part () assigned to the rotor (), wherein a rotor bearing surface of the rotor () and a counterface of the counter-bearing part () face each other to form the hydrodynamic plain bearing in the form of a combined journal—thrust bearing, having a continuous hydrodynamically load bearing gap formed between the rotor bearing surface and the counterface, wherein the rotor bearing surface and/or the counterface, when cut longitudinally and through the axis of rotation (R) in sectional view, form(s) a bearing contour forming merging contour sections (tototo) to generate hydrodynamic load capacities in both the radial and the axial direction, wherein a contour section () in sectional view in a first bearing area forms a linear section that is part of a, in particular cylindrical or partially cylindrical, bearing section rotating at least sectionally about the axis of rotation (R), wherein a further contour section (), in sectional view in a second bearing area, forms a further linear section, which is part of a further bearing area rotating at least sectionally about the axis of rotation (R), wherein this further linear section forms an angle with the axis of rotation (R), and wherein the first and the second bearing area merge via a transition section. According to the invention, a friction-optimized bearing system is to be created, which is easy to manufacture and ensures a reliable and effective bearing arrangement even under highly dynamic loads. According to the invention, this is achieved by the further linear section forming an angle in the range from >30° to <90° with the axis of rotation (R).

Exhaust gas turbocharger having a hydrodynamic plain bearing or a hydrodynamic plain bearing

An exhaust gas turbocharger having a hydrodynamic plain bearing or a hydrodynamic plain bearing, comprising a rotor () and a counter-bearing part () assigned to the rotor (), wherein a rotor bearing surface () of the rotor () and a counter-surface of the counter-bearing part () face each other to form a hydrodynamic plain bearing, wherein the rotor bearing surface and/or the counterface, when cut along and through the axis of rotation (R) in sectional view, form(s) a continuous bearing contour forming at least two contour sections (toto) to provide hydrodynamic load capacities in both radial and axial directions, and wherein the counter-bearing part () is mounted in a bearing housing () or housing part. In order to be able to provide such an exhaust gas turbocharger with a compact and efficient bearing arrangement having a hydrodynamic plain bearing, wherein at the same time the hydrodynamic plain bearing can be easily mounted with a small number of parts, provision is made according to the invention that in that a preferably circumferential gap area () for forming a trapped oil film is formed between an outer contour of the counter-bearing part () and the bearing housing () or the housing part, wherein the gap area () is spatially connected to a lubricant guide channel (), and in that the gap area () and the continuous bearing contour of the rotor () and/or of the counter-bearing part () overlap at least sectionally in the direction of the axis of rotation (R).

The invention relates to an exhaust gas turbocharger having a fluid dynamic bearing having a rotor () and a counter-bearing part () assigned to the rotor (), wherein a rotor bearing surface of the rotor () and a counterface of the counter-bearing part () face each other, to form a fluid dynamic bearing, wherein the rotor bearing surface and/or the counterface form(s) a continuous bearing contour when cut longitudinally and through the axis of rotation (R) in sectional view, which bearing contour(s) are formed of at least two contour sections (toto) to generate fluid dynamic load capacities in both the radial and the axial directions, wherein the bearing surface of the rotor () is formed by a rotor part (), which is connected to a rotor shaft () and is secured on the rotor shaft (), and wherein the rotor part () is supported relative to the rotor shaft () in the area of a support section () of the rotor shaft (). In order to be able to provide such an exhaust gas turbocharger with a compact and efficient bearing arrangement having a fluid dynamic bearing, wherein at the same time the fluid dynamic bearing can be easily mounted using few parts, provision is made according to the invention that the support section () and at least one of the contour sections (to) of the counter-bearing part () at least sectionally overlap in the direction of the axis of rotation (R).

Turbocharger with a fluid-dynamic slide bearing, or fluid-dynamic slide bearing

The invention relates to an exhaust-gas-driven turbocharger having a hydrodynamic plain bearing having a rotor and a stator, the rotor being rotatable with respect to the stator, the rotor bearing surface being located opposite a counter-surface of the stator in order to generate hydrodynamic pressure in the region of a converging gap. In such a hydrodynamic plain bearing, the application properties can be improved by the fact that the rotor bearing surface and/or the counter-surface constitutes in a section view, in the context of a section along and through the rotation axis, a continuous bearing contour that is constituted from convex or concave curvatures and/or from at least two contour segments that are embodied as straight lines and/or curvatures. The invention also relates to a hydrodynamic plain bearing or bearing arrangement having such a plain bearing.

Turbocharger

The invention relates to a hydrodynamic bearing, namely a hydrodynamic disk-shaped thrust bearing or hydrodynamic thrust washer, wherein hydrodynamic structures having elevations and having depressions arranged between adjacent elevations are arranged on opposite sides of the bearing, which hydrodynamic structures extend in the peripheral direction, and slopes of the hydrodynamic structures are arranged between adjacent depressions, which slopes extend from the depressions toward the elevations. According to the invention, at least some of the elevations of the hydrodynamic structures of the first side of the bearing are arranged in the region between two depressions of the hydrodynamic structures of the second side of the bearing, the elevations of a side of the bearing being arranged at an offset to each other in the peripheral direction.

Hydrodynamic bearing

A hydrodynamic plain bearing having a stator and a rotor rotatable with respect to the stator, a rotor bearing surface being located opposite a counter-surface of the stator in order to generate hydrodynamic pressure. The rotor bearing surface and/or the counter-surface constitutes in a section view, in the context of a section along and through the rotation axis, a continuous bearing contour that is constituted from at least two contour segments. The contour segments are suitable for generating hydrodynamic load capacity in a radial and axial direction. The contour segments are led into one another, by at least one transition segment, in such a way that hydrodynamic load capacity is generatable via the contour segments and the transition segment. The plain bearing is embodied as a multiple-surface plain bearing having two or more lubrication wedges in the region of the contour segments and of the transition segment.

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Oberderdingen, Germany

Martin Berger