Radial turbine casing
AssigneeGM Global Technology Operations LLC
InventorsMichael Franz, Hans-Joerg Heidermann
Life of this patent
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Abstract
A casing for a radial turbine in an exhaust gas turbocharger for a motor vehicle includes a gas duct having an inlet section and an adjoining spiral section, between which a casing tab is arranged. The spiral section features a radially inner turbine inlet, the axial width of which in the region of the casing tab circumferentially decreases toward an end face of the casing tab in a circumferential section. An end face of the casing tab is inclined relative to a rotational axis of the radial turbine in an axial section.
Claims16
A casing for a radial turbine in an exhaust gas turbocharger for a motor vehicle, the casing comprising:
- a gas duct having an inlet section adjoined to a spiral section, and a casing tab arranged therebetween, wherein the adjoining spiral section includes a radially inner turbine inlet, and an axial width of the adjoining spiral section in a region of the casing tab circumferentially decreases toward an end face of the casing tab in a circumferential section,
- wherein an edge of the radially inner turbine inlet in the circumferential section, which is located on an outlet side includes an angle in a range of 80° to 100° with a rotational axis of the radial turbine.
A radial turbine, comprising:
- a casing comprising a gas duct having an inlet section adjoined to a spiral section, and a casing tab arranged therebetween, wherein the adjoining spiral section includes a radially inner turbine inlet, and an axial width of the adjoining spiral section in a region of the casing tab circumferentially decreases toward an end face of the casing tab in a circumferential section;
- and
- a bladed rotor arranged in the casing,
- wherein the end face of the casing tab includes an angle in a range of 10° to 75° with a pressure side of a blade tip of the bladed rotor in each intersecting point of the end face with the pressure side within the axial section.
An exhaust gas turbocharger comprising:
- a radial turbine including a casing comprising a gas duct having an inlet section adjoined to a spiral section, and a casing tab arranged therebetween, wherein the adjoining spiral section includes a radially inner turbine inlet, and an axial width of the adjoining spiral section in a region of the casing tab circumferentially decreases toward an end face of the casing tab in a circumferential section and a bladed rotor arranged in the casing,
- wherein an end face of the casing tab is inclined relative to a rotational axis of the radial turbine in an axial section and the end face is curved in the axial section.
Dependencies are inferred from the claim text.