EXHAUST GAS TURBOCHARGER

• US 20200131926A1
• Filed: 10/25/2019
• Published: 04/30/2020
• Est. Priority Date: 10/26/2018
• Status: Active Grant

• Current Assignee: BMTS Technology GmbH & Co. KG
• Original Assignee: BMTS Technology GmbH & Co. KG
• Inventors: Bolbolan, Daren, Martens, Anatolij, Martin, Philipp, Pham, Kinh Toai
• Granted Patent: US 11,015,478 B2
• Time in Patent Office: Days
• CPC Class Codes: F01D 17/143 the shiftable member being a wall, or part thereof of a radial diffuser
• CPC Class Codes: F01D 17/165 for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line F01D17/167 takes precedence
• CPC Class Codes: F01D 25/24 Casings modified for heating or cooling F01D25/14; Casing parts, e.g. diaphragms, casing fastenings casings for rotary machines or engines in general F16M ; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045
• CPC Class Codes: F01D 25/246 Fastening of diaphragms or stator-rings
• CPC Class Codes: F02B 37/24 by using pumps or turbines with adjustable guide vanes
• CPC Class Codes: F02C 6/12 Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: F05D 2230/642 using maintaining alignment while permitting differential dilatation
• CPC Class Codes: F05D 2240/15 Heat shield
• CPC Class Codes: F05D 2260/231 Preventing heat transfer
• CPC Class Codes: F05D 2260/30 Retaining components in desired mutual position
• CPC Class Codes: F05D 2260/38 by a spring, i.e. spring loaded or biased towards a certain position

Abstract

The present disclosure relates to an exhaust gas turbocharger, for example for a motor vehicle. The exhaust gas turbocharger includes a turbine including a turbine housing and a turbine wheel, a variable turbine geometry including a vane ring and at least one adjustable guide vane, and a spring arrangement including a disc spring structured and arranged to mechanically impact the vane ring in a direction of the turbine housing. The disc spring extends in a circumferential direction with respect to a rotary axis of the turbine wheel and comprises a disc opening that extends up to a radial inside of the disc spring. A heat shield of the spring arrangement extends in the circumferential direction and is arranged on a side of the disc spring axially facing towards the vane ring.

Claims

1. An exhaust gas turbocharger, comprising:

a turbine including a turbine housing and a turbine wheel received in the turbine housing,

a variable turbine geometry including a vane ring and at least one adjustable guide vane that is guided by the vane ring,

a spring arrangement including a disc spring structured and arranged to mechanically impact the vane ring in a direction of the turbine housing, the disc spring extending in a circumferential direction with respect to a rotary axis of the turbine wheel and comprising a disc opening, wherein the disc opening extends up to a radial inside of the disc spring,

a heat shield of the spring arrangement, the heat shield extending in the circumferential direction and arranged on a side of the disc spring axially facing towards the vane ring, wherein the heat shield comprises a shield opening that extends up to a radial inside of the heat shield, and

wherein the heat shield is supported radially inside on the disc spring in at least one support section and is axially spaced apart radially outside from the disc spring.

2. The exhaust gas turbocharger according to claim 1, wherein the heat shield is spaced apart radially outside from the vane ring.

3. The exhaust gas turbocharger according to claim 1, wherein:

the heat shield is supported radially inside on the disc spring in at least two support sections,

the at least two support sections are separated from each other in the circumferential direction by separating sections, and

the heat shield and the disc spring are arranged loosely to each other in the separating sections.

4. The exhaust gas turbocharger according to claim 3, wherein:

the at least two support sections respectively extend over a part angle in the circumferential direction, and

the sum of all part angles of the at least two support sections is between 60° and

75°

.

5. The exhaust gas turbocharger according to claim 3, wherein the separating sections respectively adjoin the adjacent support sections of the at least two support sections in the circumferential direction.

6. The exhaust gas turbocharger according to claim 3, wherein the disc spring and the heat shield are axially spaced apart from each other in at least one of the separating sections.

7. The exhaust gas turbocharger according to claim 1, wherein the at least one support section has a radial support width, and wherein a ratio between the radial support width and a disc width extending from the radial inside of the disc spring to a radial outside of the disc spring is between 1:

7 and 1;

8.

8. The exhaust gas turbocharger according to claim 1, wherein the heat shield has a smaller outer diameter than the disc spring.

9. The exhaust gas turbocharger according to claim 1, wherein the vane ring is stepped on a side facing towards the spring arrangement, and includes an outside step protruding in a direction of the disc spring, wherein the outside step is structured and arranged to be impacted by the disc spring.

10. The exhaust gas turbocharger according to claim 9, wherein the vane ring further includes an inside step protruding in a direction of the heat shield, wherein the inside step is arranged radially inside of the outside step and the heat shield is spaced apart radially outside from the inside step.

11. The exhaust gas turbocharger according to claim 1, wherein the disc spring and the heat shield are fixed to one another in the at least one support section.

12. The exhaust gas turbocharger according to claim 11, wherein the disc spring and the heat shield are fixed to one another exclusively in the at least one support section.

13. The exhaust gas turbocharger according to claim 1, wherein the disc spring and the heat shield are fixed to one another via a spot welded connection.

14. The exhaust gas turbocharger according to claim 2, wherein the heat shield is supported radially inside on the disc spring in at least two support sections, and the at least two support sections are separated from each other in the circumferential direction by separating sections.

15. The exhaust gas turbocharger according to claim 14, wherein the separating sections respectively adjoin an adjacent support section of the at least two support sections in the circumferential direction.

16. A motor vehicle, comprising:

an exhaust gas turbocharger, the exhaust gas turbocharger including;

a turbine including a turbine housing and a turbine wheel received in the turbine housing;

a variable turbine geometry including a vane ring and at least one adjustable guide vane that is guided by the vane ring;

a spring arrangement including a disc spring structured and arranged to mechanically impact the vane ring in a direction of the turbine housing, the disc spring extending in a circumferential direction with respect to a rotary axis of the turbine wheel and comprising a disc opening, wherein the disc opening extends up to a radial inside of the disc spring;

a heat shield of the spring arrangement, the heat shield extending in the circumferential direction and arranged on a side of the disc spring axially facing towards the vane ring, wherein the heat shield comprises a shield opening that extends up to a radial inside of the heat shield; and

wherein the heat shield is supported radially inside on the disc spring in at least one support section and is axially spaced apart radially outside from the disc spring.

17. The motor vehicle according to claim 16, wherein the heat shield is supported radially inside on the disc spring in at least two support sections, and the at least two support sections are separated from each other in the circumferential direction by separating sections.

18. The motor vehicle according to claim 17, wherein the disc spring and the heat shield are axially spaced apart from each other in at least one of the separating sections.

19. The motor vehicle according to claim 16, wherein the vane ring is stepped on a side facing towards the spring arrangement, and includes an outside step protruding in a direction of the disc spring, wherein the outside step is structured and arranged to be impacted by the disc spring.

20. The motor vehicle according to claim 19, wherein the vane ring further includes an inside step disposed radially inside of the outside step, and wherein the heat shield is spaced apart radially outside from the inside step of the vane ring.