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

US11629614B2 · kind B2 · utility

Assignee

• BMTS Technology GmbH & Co. KG · DE

Inventors

• Martin Berger · Nettetal, DE
• Rüdiger Kleinschmidt · Bammental, DE
• Frieder Stetter · Stuttgart, DE
• Oliver Kuhne · Stuttgart, DE
• Steffen Schmitt · Ditzingen, DE

Key dates

• Filing date: Nov 22, 2019
• Grant date: Apr 18, 2023
• Expiry date: Nov 22, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C2360/24
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An exhaust gas turbocharger having a hydrodynamic plain bearing or a hydrodynamic plain bearing, comprising a rotor (10) and a counter-bearing part (50) assigned to the rotor (10), wherein a rotor bearing surface (17.1, 17.2, 17.3) of the rotor (10) and a counter-surface of the counter-bearing part (50) 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 (44.1 to 44.3; 53.1 to 53.3) to provide hydrodynamic load capacities in both radial and axial directions, and wherein the counter-bearing part (50) is mounted in a bearing housing (60) 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 (57) for forming a trapped oil film is formed between an outer contour of the cou…