Patent ID: 8418460
Filing Date: 2013-04-16
Classification: F01D,F05D

Abstract:
1. An exhaust gas turbocharger for an internal combustion engine having a turbine with a rotor chamber ( 10 ) and a rotor ( 4 ) rotatably disposed in the rotor chamber ( 10 ), an exhaust gas guide section ( 2 ) which is arranged in an exhaust gas tract of the internal combustion engine and through which exhaust gas discharged from the internal combustion engine is conducted, a guide apparatus ( 12 ) arranged around the turbine rotor ( 4 ) and comprising a support ring ( 13 ) with rotatably mounted guide vanes ( 14 ) and a contour sleeve ( 15 ), wherein, for fixing a first distance (A) between the support ring ( 13 ) and the contour sleeve ( 15 ), at least one spacer element ( 16 ) with a longitudinal axis ( 17 ), an outer surface ( 18 ) and a cross-sectional area ( 19 ) is provided, the exhaust gas guide section ( 2 ) being a spiral channel ( 8 ) with a spiral inlet flow guide tongue ( 20 ), and the spacer element ( 16 ) being positioned in a region positioned radially outside, and spaced from, the guide vanes ( 14 ) such that the trailing wake line ( 21 ) of the spacer element ( 16 ) extends essentially through the center of a flow space between two adjacent guide vanes ( 14 ) of the support ring ( 13 ) without disturbing the inlet gas flow around the adjacent guide vanes ( 14 ), the inlet flow guide tongue ( 20 ) forming a guide tongue trailing wake ( 23 ) and one of the spacer element ( 21 ) being positioned in the region of the inlet flow guide tongue trailing wake ( 23 ) such that the trailing wake line ( 21 ) of the spacer element ( 16 ) coincides with that of the inlet flow guide tongue ( 20 ).