Turbo Wheel And Shaft Assembly
AssigneeGM Global Technology Operations LLC
InventorsHuaxin LI, Louis P. BEGIN
Life of this patent
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Abstract
A turbine wheel and shaft assembly is provided for a turbocharger including a turbine wheel including a body portion supporting a plurality of blades on a first axial face thereof. A hub extends from a body portion on a second axial face. A shaft is welded to the hub at a weld location spaced from the second axial face. The weld location is spaced axially from the second axial face by a distance sufficient to provide a significant reduction in the residual stresses in the welded parts. This design is intended to mitigate turbine wheel imbalance problems.
Claims17
A turbine wheel and shaft assembly for a turbocharger, comprising:
- a turbine wheel including a body portion supporting a plurality of blades on a first axial face thereof and a hub extending from said body portion on a second axial face, said hub having a diameter;
- a shaft welded to said hub at a weld location spaced from said second axial face, wherein said weld location is spaced axially from said second axial face of said body portion by a distance that is at least 50 percent of said diameter.
A turbocharger, comprising:
- a housing including an inlet for receiving an engine exhaust gas flow, a turbine chamber and an outlet for exhaust gas discharge;
- a turbine wheel and shaft assembly disposed in said turbine chamber and including a turbine wheel having a body portion supporting a plurality of blades on a first axial face thereof and a hub extending from said body portion on a second axial face opposite the first axial face, said hub having a diameter, and a shaft having a first end welded to said hub at a weld location spaced from said second axial face, wherein said weld location is spaced axially from said second axial face of said body portion by a distance that is at least 50 percent of said diameter.
An engine, comprising:
- an engine structure defining a plurality of cylinders receiving a respective piston therein and having inlet and exhaust passages in communication with each of the cylinders;
- a turbocharger comprising:
- a housing including an inlet for receiving an engine exhaust gas flow from said exhaust passages, a turbine chamber and an outlet for exhaust gas discharge;
- a turbine wheel and shaft assembly disposed in said turbine chamber and including a turbine wheel having a body portion supporting a plurality of blades on a first axial face thereof and a hub extending from said body portion on a second axial face opposite the first axial face, said hub having a diameter, and a shaft welded to said hub at a weld location spaced from said second axial face, wherein said weld location is spaced axially from said second axial face of said body portion by a distance that is at least 50 percent of said diameter.
Dependencies are inferred from the claim text.