Patent ID: 7798770
Filing Date: 2010-09-21
Classification: F01D,F02C,F05D,Y10S

Abstract:
1. A turbine wheel in an exhaust gas turbine ( 3 ) of an exhaust gas turbocharger ( 2 ), said turbine wheel ( 12 ) having a hub ( 13 ) and a plurality of turbine wheel blades ( 15 ) arranged on the turbine wheel hub ( 13 ) and extending axially between a radial turbine wheel inlet area ( 16 ) and an axial turbine wheel outlet area ( 17 ), the turbine wheel blades ( 15 ) having the greatest external diameter (D) in the region of the turbine wheel inlet area ( 16 ), an end wall ( 20 ) adjacent to the turbine wheel inlet area ( 16 ) of the turbine wheel ( 12 ) extending radially as far as the greatest external diameter (D) of the turbine wheel blades ( 15 ) and the turbine wheel blades ( 15 ) being constructed in such a way that the ratio of the hub contour thickness (d n ) to the external contour thickness (d a ) of each turbine wheel blade ( 15 ) in the axial half facing the turbine wheel outlet ( 17 ) of the turbine wheel ( 12 ) follows the function wherein d d x designates the current axial position starting from the end wall, adjacent to the turbine wheel inlet ( l wherein d designates the current blade wheel thickness h designates the current radial position in the region of the turbine wheel blade ( h ex designates an exponent in the range 1≦ex≦2.