Abstract

The invention relates to an impeller for a turbocharger. The impeller (1) is mounted in a housing of the turbocharger (3) in a rotatable manner about an axis of rotation, wherein the impeller (1) and has an impeller hub (5) comprising an impeller back (6) and an impeller front facing away from the impeller back (6), and a plurality of impeller blades (4) are formed on the impeller hub (5) so as to extend between the impeller back (6) and the impeller front. A balancing mark (11) is arranged in a blade channel (9) formed between a first blade (7) of the plurality of impeller blades (4) and a second blade (8) of the plurality of impeller blades (4), said second blade being arranged adjacently to the first blade (7). According to the invention, the balancing mark (12) is triangular-like. The invention additionally relates to a turbocharger comprising such an impeller and to a method for balancing a rotor assembly for such a turbocharger.

IPC Classes  ?

• F04D 29/66 - Combating cavitation, whirls, noise, vibration, or the likeBalancing
• F01D 5/02 - Blade-carrying members, e.g. rotors
• F01D 5/04 - Blade-carrying members, e.g. rotors for radial-flow machines or engines
• F02C 6/12 - Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
• G01M 1/34 - Compensating imbalance by removing material from the body to be tested, e.g. from the tread of tyres

Abstract

The invention relates to a bearing device for an exhaust gas turbocharger, having a first radial bearing (13) and a second radial bearing (14), wherein the radial bearings (13, 14) are configured for radially mounting a shaft (8) of the exhaust gas turbocharger (2) with a rotational axis (11), and wherein a first outflow gap (18) and a second outflow gap (23), respectively, are configured between the first radial bearing (13) and a first supporting wall (17) of the exhaust gas turbocharger (2) for axially supporting the first radial bearing (13), which first supporting wall (17) extends radially and is configured so as to face a turbine wheel (7) of the exhaust gas turbocharger (2), and between the second radial bearing (14) and a second supporting wall (22) of the exhaust gas turbocharger (2) for axially supporting the second radial bearing (14), which second supporting wall (22) extends radially and is configured so as to face a compressor impeller (6) of the exhaust gas turbocharger (2). According to the invention, for axial and simultaneous radial bearing and/or for supporting the radial bearing, the first outflow gap (18) and/or the second outflow gap (23) are/is configured so as to be inclined or curved with respect to the rotational axis (11) at least partially with the configuration of an angle (α) which is greater than or less than 90°.

IPC Classes  ?

• F01D 25/16 - Arrangement of bearingsSupporting or mounting bearings in casings
• F16C 17/02 - Sliding-contact bearings for exclusively rotary movement for radial load only
• F16C 17/10 - Sliding-contact bearings for exclusively rotary movement for both radial and axial load
• F16C 17/18 - Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with floating brasses or bushes, rotatable at a reduced speed
• F16C 33/10 - Construction relative to lubrication

Abstract

The invention relates to an impeller for a turbocharger. The impeller (1) is mounted in a housing of the turbocharger (3) in a rotatable manner about a rotational axis (4) and has an impeller hub (6) with an impeller back (7) and an empeller front facing away from the impeller back (7), and a plurality of impeller blades (5) are formed on the impeller hub (6) so as to extend between the impeller back (7) and the impeller front. A balancing mark (12) is arranged in a blade channel (10) formed between a first blade (8) of the plurality of impeller blades (5) and a second blade (9) of the plurality of impeller blades (5), said second blade being arranged adjacently to the first blade (8). According to the invention, the width (B) of the balancing mark (12) is smaller than the length (L) of the balancing mark (12). The invention additionally relates to a turbocharger comprising such an impeller and to a method for balancing a rotor assembly for such a turbocharger.

IPC Classes  ?

• F01D 5/02 - Blade-carrying members, e.g. rotors
• F04D 29/66 - Combating cavitation, whirls, noise, vibration, or the likeBalancing
• G01M 1/34 - Compensating imbalance by removing material from the body to be tested, e.g. from the tread of tyres