Exhaust gas turbocharger with vibration-insulating mounting of a rotor

1. An exhaust gas turbocharger, comprising:

a rotor mounted in a bearing housing via a rolling bearing, wherein the rolling bearing includes an outer shell, an inner shell and rolling bodies running therebetween,

at least one annular and vibrational noise absorbing diaphragm spring element arranged between the outer shell of the rolling bearing and the bearing housing, the diaphragm spring element mounting the rotor in radial direction and axial directions in a vibration-insulating manner with respect to the bearing housing, and

a retaining ring arranged axially between a radial surface of the bearing housing and a radial surface of the diaphragm spring element.

2. The exhaust gas turbocharger according to claim 1 , wherein the diaphragm spring element is formed of metal.

3. The exhaust gas turbocharger according to claim 1 , wherein the diaphragm spring element includes an outer ring and an inner ring connected therewith via ribs.

4. The exhaust gas turbocharger according to claim 3 , wherein the ribs are arranged at an angle relative to the radial direction.

5. The exhaust gas turbocharger according to claim 3 ,

wherein the ribs connect to the inner ring at a first connection point radially in the direction of the outer ring,

the ribs connect to the outer ring at a second connection point radially in the direction of the inner ring, and

the first and the second connection points are not located on a common radial ray.

6. The exhaust gas turbocharger according to claim 1 , wherein the diaphragm spring element is formed as a punched part.

7. The exhaust gas turbocharger according to claim 1 , wherein the diaphragm spring element is at least one of fixed to the outer shell of the rolling bearing and fixed to the bearing housing.

8. The exhaust gas turbocharger according to claim 7 , wherein the diaphragm spring element is one of welded in, clamped in, or flanged on to the outer shell of the rolling bearing.

9. The exhaust gas turbocharger according to claim 1 , wherein the retaining ring includes a plastic contact region via which the retaining ring is in contact with the diaphragm spring element.

10. A diaphragm spring element for an exhaust gas turbocharger, comprising:

an annular outer ring connected to an annular inner ring via a plurality of circumferentially spaced ribs, wherein the respective ribs are arranged between the outer ring and the inner ring at an angle with respect to a radial direction and are formed at least one of straight and wavy;

wherein the inner ring and the outer ring are solid circumferentially.

11. The diaphragm spring element according to claim 10 ,

wherein the ribs connect to the inner ring at a first connection point radially in the direction of the outer ring,

the ribs connect to the outer ring at a second connection point radially in the direction of the inner ring, and

the first and the second connection point are not located on a common radial ray.

12. The diaphragm spring element according to claim 11 , wherein the respective ribs are arranged obliquely to the radial direction.

13. The exhaust gas turbocharger according to claim 4 , wherein the ribs connect to the inner ring at a first connection point radially in the direction of the outer ring;

the ribs connect to the outer ring at a second connection point radially in the direction of the inner ring; and

the first and second connection points are offset in circumferential direction relative to one another.

14. The exhaust gas turbocharger according to claim 7 , wherein the diaphragm spring element is fixed to the bearing housing via the retaining ring.

15. The exhaust gas turbocharger according to claim 1 , wherein the retaining ring includes an elastomer contact region, the contact region being connected to an outer ring of the diaphragm spring element.

16. An exhaust gas turbocharger, comprising:

a rotor mounted in a bearing housing via a rolling bearing, the rolling bearing including an outer shell, an inner shell and rolling bodies running therebetween;

at least one annular diaphragm spring element disposed between the outer shell of the rolling bearing and the bearing housing, the diaphragm spring element including an annular outer ring connected to an annular inner ring via a plurality of circumferential spaced ribs, the ribs being arranged between the outer ring and the inner ring at an angle with respect to a radial direction; and

a retaining ring arranged axially between a radial surface of the bearing housing and a radial surface of the diaphragm spring element;

wherein the diaphragm spring element is connected to the outer shell of the rolling bearing via the inner ring and is connected to the bearing housing via the outer ring, and wherein the diaphragm spring element mounts the rotor in the radial and axial directions in a vibration-insulating manner with respect to the bearing housing.

17. The exhaust gas turbocharger according to claim 16 , wherein the retaining ring includes an elastomer contact region connected to the outer ring of the diaphragm spring element, wherein the outer ring of the diaphragm spring element is fixed to the bearing housing via the retaining ring.

18. The exhaust gas turbocharger according to claim 16 , wherein the outer shell of the rolling bearing includes at least one groove into which the inner ring of the diaphragm spring element engages.

19. The exhaust gas turbocharger according to claim 16 , wherein the ribs connect to the inner ring at a first connection point radially in the direction of the outer ring;

the ribs connect to the outer ring at a second connection point radially in the direction of the inner ring; and

the first and second connection points are offset in circumferential direction relative to one another.