POSITION SECUREMENT OF AN EXHAUST GAS TURBOCHARGER HOUSING

Abstract

A turbocharger having a housing and a stator. The housing and/or the stator has an inner and an outer housing component. An inner section of the housing component lies directly against and covers a lateral section of the housing component. The lateral section and the inner section are formed such that they form a positive-locking connection, which fixes the inner housing component and the outer housing component against positional change along a longitudinal axis of the turbocharger and/or against a rotation about this longitudinal axis. The inner housing component and/or the outer housing component is at least partly produced by additive manufacturing.

Claims

1. A turbocharger, comprising: a housing; at least one stator; wherein at least the housing and/or the at least one stator comprise or comprises: an inner housing component having a lateral section; and an outer housing component, an inner section of the outer housing component directly lies against the lateral section of the inner housing component and covers the lateral section, wherein a respective lateral section and a respective inner section are formed such that together they form a positive-locking connection that fixes the inner housing component and the outer housing component against a relative positional change relative to one another along a longitudinal axis of the turbocharger and/or against a rotation about the longitudinal axis, and wherein the respective inner housing component and/or the respective outer housing component are at least partly produced by additive manufacturing.

2. The turbocharger according to claim 1, wherein the lateral section of the inner housing component and/or the inner section of the outer housing component is manufactured entirely by the additive manufacturing.

3. The turbocharger according to claim 1, wherein the lateral section comprises at least one positioning element that projects from the lateral section, and the inner section comprises at least one recess corresponding to the at least one positioning element so that together these form the positive-locking connection.

4. The turbocharger according to claim 3, wherein the at least one positioning element is a positioning lug and the at least one recess is a groove.

5. The turbocharger according to claim 3, wherein the at least one positioning element is at least one spline and the at least one recess is at least one spline hub.

6. The turbocharger according to claim 3, wherein the at least one positioning element is partly or entirely formed as a wavy spline and the at least one recess is a wavy spline hub.

7. The turbocharger according to claim 1, wherein a plug-twist closure or a bayonet closure is integrated in the lateral section and the inner section, which establishes a positive-locking connection between the inner housing component and the outer housing component.

8. The turbocharger according to claim 1, wherein at least one of the inner housing component and the outer housing component is segmented.

9. The turbocharger according to claim 1, wherein hollow spaces are integrated in at least one of the inner housing component and the outer housing component.

10. The turbocharger according to claim 1, wherein crash elements configured to absorb kinetic energy of components in an event of a component failure are integrated in at least one of the inner housing component and the outer housing component.

11. The turbocharger according to claim 1, wherein the crash elements are a honeycomb structure.

12. A method for producing a turbocharger having an inner housing component having a lateral section; and an outer housing component, an inner section of the outer housing component directly lies against the lateral section of the inner housing component and covers the lateral section, comprising: at least partly producing the inner housing component by additive manufacturing; and at least partly producing the outer housing component by the additive manufacturing.

13. The method for producing a turbocharger according to claim 12, wherein the lateral section and/or the inner section are entirely produced by the additive manufacturing.

14. The method for producing a turbocharger according to claim 12, wherein the additive manufacturing is a 3D printing method.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other advantageous further developments of the invention are marked in the subclaims or are shown in more detail by way of the figures together with the description of the preferred embodiment of the invention. It shows:

[0015] FIG. 1 is a sectional view of turbocharger housing with a positioning lug;

[0016] FIG. 2 is a sectional view of a turbocharger housing with a spline shaft seat;

[0017] FIG. 3 is a sectional view of a turbocharger housing with a bayonet closure;

[0018] FIG. 4 is a sectional view of a segmented turbocharger housing with a spline shaft seat; and

[0019] FIG. 5 is a sectional view of a turbocharger housing with integrated crash elements.

DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS

[0020] In FIG. 1, a sectional view of a housing 1 of a turbocharger with a positioning lug 51 is shown. The housing 1 comprises an inner housing component 3 and an outer housing component 4. An inner portion 41 of outer housing component 4 is directly against a lateral section 31 of the inner housing component 3 and covers the lateral section 31. The lateral section 31 and the inner section 41 are entirely produced by additive manufacturing. By this manufacturing method, the positioning lug 51, which projects from the lateral section 31, is formed on the lateral section. According to the positioning lug 51, a recess as a groove 61 is formed on the inner section 41. Consequently, the lateral section 31 and the inner section 41 together form a positive-locking connection that fixes the inner housing component 3 and the outer housing component 4 against a relative positional change relative to one another against a rotation about a longitudinal axis.

[0021] FIG. 2 shows a sectional view of a housing 1 of a turbocharger according to FIG. 1 with alternative positioning elements. The positioning elements are formed as four splines 52 and the recesses as four spline hubs 62. The splines 52 and the spline hubs 62 are evenly distributed over the circumference, wherein the, in the view of FIG. 2, lower spline 52 is formed with lesser width.

[0022] A sectional view of a turbocharger housing 1 with a bayonet closure 8 is shown in FIG. 3. The bayonet closure 8 is integrated in the lateral section 31 and the inner portion 41 and constitutes a positive-locking connection between the inner housing component 3 and the outer housing component 4. Together, they form a positive-locking connection, which fixes the inner housing component 3 and the outer housing component 4 against a relative positional changes relative to one another along a longitudinal axis of the turbocharger.

[0023] FIG. 4 shows a sectional view of a housing 1 of a turbocharger according to FIG. 1 with a further alternative positioning element. The lateral section 31 of the inner housing component 3 is formed as a wavy spline 53 or a wavy spline arrangement and the inner section 63 as a wavy spline hub 63. Both the wavy spline 53 and also the wavy spline hub 63 fully extend about the lateral section 31 and the inner section 41 respectively. In addition to this, the inner housing component 3 is segmented.

[0024] FIG. 5 shows a sectional view of a turbocharger housing 1 with crash elements 9. The crash elements 9 are formed in an energy-absorbing manner and are integrated in the inner housing component 3 for absorbing in particular kinetic energy of components upon a component failure. The position securement in this case is realized with a wavy spline 53 and a wavy spline hub 63.

[0025] Thus, while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.