Radial turbine-blade wheel for a rotor assembly of an exhaust gas turbocharger of an internal combustion engine, comprises a hub body, which has a base area and a hub area and to which ten blades are arranged

摘要

The radial turbine-blade wheel comprises a hub body (10), which has a base area (12) and a hub area (14) and to which ten blades (16) are arranged. A ratio (V 1) of an axial length (l ax) of a blade and a double radius (D 1) of the blade is 0.35. A ratio (V 2) of the axial length (l ax) of the blade and a radial length (l a) of a blade trailing edge (20) is 1.45. A ratio (V 3) of a radius (D(2N)) of the hub area and a radius (D 2a) of a radially outer vertex (C) of the trailing edge of the blade is 0.35. A tilting angle (epsilon ) of the trailing edge of the blade is 3[deg] . The radial turbine-blade wheel comprises a hub body (10), which has a base area (12) and a hub area (14) and to which ten blades (16) are arranged. A ratio (V 1) of an axial length (l ax) of a blade and a double radius (D 1) of the blade is 0.35. A ratio (V 2) of the axial length (l ax) of the blade and a radial length (l a) of a blade trailing edge (20) is 1.45. A ratio (V 3) of a radius (D(2N)) of the hub area and a radius (D 2a) of a radially outer vertex (C) of the trailing edge of the blade is 0.35. A tilting angle (epsilon ) of the trailing edge of the blade is 3[deg] . The blade is formed in a curved manner and has an average wheel-blade exit angle (beta ) of below 33[deg] in the area of the trailing edge of the blade related to an intended direction of rotation (DR). A thickness factor (f d) of the blade is 0.13. An outer contour thickness (d a) of the blade is 0.5-0.7 mm and/or hub contour thickness (d n) of the blade is 0.8-4.3 mm. The radial turbine wheel possesses multiple rotation-symmetries, and is made of high-temperature nickel alloy and/or is formed as cast part. A radially outer longitudinal area of a blade root of the blade is radially arranged along the base area. Independent claims are included for: (1) a process for producing a radial turbine-blade wheel for a rotor assembly of an exhaust gas turbocharger of an internal combustion engine; and (2) a motor vehicle with an internal combustion engine.