Connection assembly for connecting turbine housing to support housing and exhaust gas turbocharger

Abstract

In a connection assembly of a turbine housing to a bearing housing of an exhaust gas turbocharger and to an exhaust gas turbocharger, wherein the turbine housing and the bearing housing are centered relative to each other and connected to each other in the region of a connection joint including a sealing assembly with a heat shield disposed between the turbine housing and the bearing housing, at least one cutout is provided in the heat shield for accommodating a centering means by way of which the turbine housing and the bearing housing are directly centered relative to one another.

Description

technical field [0001] The invention relates to a connection arrangement for connecting a bearing housing of an exhaust-gas turbocharger to a turbine housing according to the preamble of claim 1 and to an exhaust-gas turbocharger according to the preamble of claim 10 device. Background technique [0002] Such connection assemblies are known and available in figure 1 shown in . [0003] figure 1 A connection arrangement 10 for connecting a turbine housing 14 of an exhaust-gas turbocharger to a support housing 12 is shown. Here, the turbine housing 14 is centered on the bearing housing 12 by means of a centering flange 21 . [0004] If the two housings are connected by means of a V-shaped clamping strip 16 , a connecting seam 19 to be sealed will of course be formed. [0005] The sealing of the connecting joint 19 is achieved in that the turbine housing 14 and the support housing 12 together with the thermal insulation 18 form a sealing assembly 20 , thereby preventing th...

AI Technical Summary

Problems solved by technology

thus, figure 1 A disadvantage of the prior art shown in is that different thermal expansions of the two housings occur due to different thermal expansion coefficients

[0009] Since the insulation 18 is positioned more axially toward the turbine casing 14 so that the seal assembly 20 is not centered with respect to the V-ribbon clamp 16 , at extreme temperature differentials due to differential thermal expansion of the casing, Causes a gap that cannot be adequately compensated, or even not compensated at all, by a V-ribbon clamp

The result may be gas leaks, exhaust gas may flow from the exhaust turbocharger into the environment

[0010] In addition, the different thermal expansion of the housings is exacerbated by improper positioning of the thermal insulation 18 which causes the turbine housing 14 to heat up more strongly than the support housing 12

[0011] In addition, this higher heat introduction may cause warping / bending of the surfaces of the insulation 18 that make contact in the seal assembly 20, which warping can cause gas leakage

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