Turbocharger
AssigneeBorgWarner Inc.
InventorMichael Renett
Life of this patent
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Abstract
The invention relates to an exhaust gas turbocharger (1) having a turbine wheel arrangement (20), comprising: a turbine wheel (4) and a shaft (21), which can be connected to the turbine wheel (4) by means of a connecting section (22), wherein the connecting section (22) has a trunnion (23) with a diameter (DZ) that is smaller than the largest diameter (DWA) of the shaft (21).
Claims14
An exhaust gas turbocharger (1) with a turbine wheel arrangement (20) which has:
- a turbine wheel (4) and
- a shaft (21) which is connected to the turbine wheel via a connecting portion (22) by means of a welded joint, the connecting portion (22) having a journal (23) with a diameter (DZ) which is smaller than the largest diameter (DWA) of the shaft (21), wherein the welded joint is a friction welded joint having a bead (28) which comprises a bead outside diameter (29) which is smaller than the largest diameter (DWA) of the shaft (21).
A turbine wheel arrangement (20) of an exhaust gas turbocharger (1),
- with a turbine wheel (4) and
- with a shaft (21) which is connected to the turbine wheel (4) via a connecting portion (22),
- wherein the connecting portion (22) has a journal (23) with a diameter (DZ) which is smaller than the largest shaft diameter (DWA) of the shaft (21).
A method for producing a turbine wheel arrangement (20), having a turbine wheel (4) and a shaft (21), of an exhaust gas turbocharger (1), with the following method steps:
- producing the turbine wheel (4),
- producing the shaft (21) with a connecting portion (22) which has a journal (23), the diameter (DZ) of which is smaller than the largest diameter (DWA) of the shaft (21), and
- connecting the turbine wheel (4) and of the shaft (21) by a friction welding operation in which the journal (23) is welded to the turbine wheel (4), with production of a bead (28), the outside diameter (29) of which is smaller than the largest diameter (DWA) of the shaft (21).
Dependencies are inferred from the claim text.