Connecting device between a turbine housing of an exhaust turbocharger and a connection housing

Abstract

A connecting device is provided between a turbine housing of an exhaust turbocharger and an exhaust manifold housing of an internal combustion engine. The turbine housing and the exhaust manifold housing are kept in position via a band clamp which acts with first and second limbs, which are oriented in a V shaped manner in cross section and are connected via a web, on supporting devices, which are attached to outer circumferences of the turbine housing and of the exhaust manifold housing, and are configured in the manner of first and second ring flanges placed on each other, such that, firstly, first and second clamping surfaces of the limbs are operatively connected to third and fourth clamping surfaces of the supporting devices on first and second connecting planes, and, secondly, first and second radial supporting surfaces are operatively connected to each other on a supporting plane of the supporting devices. An intermediate ring is effective between the second clamping surface of the second limb and an inner supporting surface of the second edge flange. The intermediate ring is clamped against the inner supporting surface of the second ring flange via the second and fourth clamping surfaces and a clamping surface portion of the intermediate ring.

Claims

1-10. (canceled)

11. A connecting device between a turbine housing of an exhaust turbocharger and a connection housing, comprising: a band clamp that keeps the turbine housing and the connection housing in position, wherein the band clamp acts with first and second limbs, which are oriented in a V-shaped manner in cross section and are connected via a web, on supporting devices, which are attached to outer circumferences of the turbine housing and of the connection housing, and are configured in the manner of first and second ring flanges placed on each other, first and second clamping surfaces of the limbs are operatively connected to third and fourth clamping surfaces of the supporting devices on first and second connecting planes, and, first and second radial supporting surfaces are operatively connected to each other on a supporting plane of the supporting devices, an intermediate ring is effective between the second clamping surface of the second limb and an inner supporting surface of the second ring flange, wherein the intermediate ring is clamped against the inner supporting surface of the second ring flange via the second and fourth clamping surfaces and a clamping surface portion of the intermediate ring.

12. The connecting device as claimed in claim 11, wherein, in order to form a step-shaped recess between the first and second ring flanges, the second ring flange has a smaller outside diameter than the first ring flange.

13. The connecting device as claimed in claim 11, wherein the intermediate ring has an outer axial portion projecting into the recess and a radial portion which is guided away from said axial portion, the intermediate ring surrounds the clamping surface portion and is directed toward a central longitudinal plane of the turbine housing and, the intermediate ring acts with the clamping surface portion on an inner supporting surface and cooperates via a second clamping surface with a first clamping surface.

14. The connecting device as claimed in claim 11, wherein the intermediate ring has an outer axial portion projecting into the recess and a central radial portion which runs with respect to a central longitudinal plane of the turbine housing in the same direction as the second and fourth clamping surfaces and which is adjoined by an inner radial portion, and the inner radial portion has the clamping surface portion, wherein the inner ring is clamped against the inner supporting surface of the second ring flange via the clamping surfaces and the clamping surface portion.

15. The connecting device as claimed in claim 11, wherein the turbine housing is produced from steel and the connection housing is produced from light metal.

16. The connecting device as claimed in claim 11, wherein the intermediate ring is composed of steel or of a comparable material.

17. The connecting device as claimed in claim 11, wherein the intermediate ring is assembled from ring halves or ring segments.

18. The connecting device as claimed in claim 11, wherein the second ring flange of the connecting device is formed by a ring-like recess in the exhaust manifold housing.

19. The connecting device as claimed in claim 11, wherein the connection housing is an exhaust manifold housing.

20. A connecting device between a turbine housing of an exhaust turbocharger and a connection housing, comprising: a band clamp that keeps the turbine housing and the exhaust manifold housing in position, wherein the band clamp acts with first and second limbs, which are oriented in a V-shaped manner in cross section and are connected via a web, on supporting devices, which are attached to outer circumferences of the turbine housing and of the connection housing, and are configured in the manner of first and second ring flanges placed on each other, first and second clamping surfaces of the limbs are operatively connected to third and fourth clamping surfaces of the supporting devices on first and second connecting planes, first and second radial supporting surfaces are operatively connected to each other on a supporting plane of the supporting devices, an intermediate ring designed as a force transmission element is effective between the second clamping surface of the second limb and an inner supporting surface of the second ring flange, the intermediate ring is clamped against an inner supporting surface of the second ring flange via the second and fourth clamping surfaces between the second limb and the intermediate ring and also a clamping surface portion of the intermediate ring, and the turbine housing and the connection housing are composed of different materials.

21. The connecting device as claimed in claim 20, wherein the turbine housing is composed of a ferrous metal, the connection housing is composed of light metal, composite material, and the intermediate ring is composed of steel.

22. The connecting device as claimed in claim 20, wherein the connection housing is an exhaust manifold housing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Exemplary embodiments of the invention which are explained in more detail below are illustrated in the drawing, in which:

[0011] FIG. 1 shows a view from above of a turbine housing of an exhaust turbocharger and an exhaust manifold housing of an internal combustion engine (not illustrated),

[0012] FIG. 2 shows a section according to the line II-II from FIG. 1 on a larger scale with a connecting device having an intermediate ring,

[0013] FIG. 3 shows a detail X from FIG. 2 with a first embodiment of the intermediate ring of the connecting device according to FIG. 2,

[0014] FIG. 4 shows a second embodiment of the intermediate ring of the connecting device according to FIG. 2,

[0015] FIG. 5 shows a main view of the intermediate ring according to FIG. 2 with a first embodiment,

[0016] FIG. 6 shows a view according to FIG. 5 with a second embodiment.

DETAILED DESCRIPTION OF THE DRAWINGS

[0017] A connecting device 1 for assembling a turbine housing 2 of an exhaust turbocharger 3 with an exhaust manifold housing 4, which are part of an internal combustion engine, comprises a ring-like band clamp 5. The band clamp 5 has first and second limbs 7 and 8 which are oriented in a V-shaped manneracute angle in cross section and are connected by means of a web 6FIG. 2. Free ends of the limbs 7 and 8 are provided with angled web portions 7 and 8. A reinforcing ring 9 is attached fixedly to the outer circumference of the web 6. A lock-like .clamping device 10 with supporting brackets and a clamping screw is attached to ring portion ends of the clamping bandDE 10 2011 016 223 A1.

[0018] The first and second limbs 7 and 8 of the band clamp 5 act on supporting devices 15 and 16 which are attached to outer circumferences 11 and 12 of the turbine housing 2 and of the exhaust manifold housing 4, correspond and are designed in the manner of first and second ring flanges 13 and 14 which are placed on each other. For this purpose, firstly, first and second clamping surfaces 17 and 18 of the limbs 7 and 8 are operatively connected to third and fourth clamping surfaces 19 and 20 of the supporting devices 15 and 16 and, secondly, with first and second radial supporting surfaces 21 and 22 on a supporting plane SE of the supporting devices 15 and 16. In the supporting plane SE, an annular sealing body DK rests between the turbine housing 2 and exhaust manifold housing 4, specifically in a recess AN.

[0019] An intermediate ring 24 is effective between the second clamping surface 18 of the second limb 8 and an inner supporting surface 23 of the second ring flange 14. Said intermediate ring is clamped against the inner supporting surface 23 of the second ring flange 14 via the second and fourth clamping surfaces 18 and 20 and also a clamping surface portion 25 of the intermediate ring 24.

[0020] In order to form a stack-shaped recess 26 between the ring flanges 13 and 14, the outside diameter DI of the second ring flange 14 is smaller than the outside diameter DII of the first ring flange 13FIG. 2. An outer axial portion 27 of a first embodimentFIG. 3embodied by an intermediate ring 24, projects into the recess 26. A central radial portion 28 which runs in the same direction as the second and fourth clamping surfaces 18 and 20 extends from said axial portion 27 toward a central longitudinal plane (not shown) of the turbine housing 2. The central radial portion 28 is adjoined by an inner radial portion 29 which has the clamping surface portion 25 and interacts in a supporting manner with the inner supporting surface 23 of the second ring flange 14. The axial portion 27 is arranged in the recess 26 without contact, i.e. without contact with the second ring flange 14 or the first ring flange 13. This also applies analogously to the central radial portion 28.

[0021] In a second embodimentFIG. 4an intermediate ring 30 has an axial portion 31 which projects without contact into a recess 32 between first and second ring flanges 33 and 34. The axial portion 31 together with a radial portion 35 forms an angular construction unit, to the radial portion 35 of which a clamping surface portion 36 is attached; the latter is clamped against an inner supporting surface 37 of the second ring flange 34. This takes place with the aid of a band clamp 38 which is configured similarly to the band clamp 5 with first and second limbs 39 and 40 running in a V-shaped manner with respect to each other. The second limb 40 acts by means of a first clamping surface 41 on a second clamping surface 42 of the intermediate ring 30. In order to form the second ring flange 34, a U-shaped recess 44 is incorporated into an exhaust manifold housing 43.

[0022] For the installation of the intermediate ring 24 which is composed of steel or of another suitable material, said intermediate ring is composed of ring halves 45 and 46FIG. 5or ring segments 47, 48 and 49.

[0023] Finally, ferrous metal is suitable as the material for the turbine housing 2, and light metal or a composite material is suitable for the exhaust manifold housing.