Charging device, more preferably exhaust gas turbocharger for a motor vehicle
OwnerThomas Streichinventor
Life of this patent
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Abstract
The invention relates to a charging device, such as an exhaust gas turbocharger for a motor vehicle, with a shaft carrying a compressor wheel, with a fixing device for fixing the compressor wheel on the shaft, with at least one component fixed on the shaft together with the compressor wheel by the fixing device. It can be achieved that heat expansion of the compressor wheel through the expansion coefficient (α3) of at least one component can be at least partially offset. Because of this it is possible to increase the initial clamping force with which the components are positioned or clamped on the shaft without the permissible surface pressure for the clamp components being exceeded.
Claims20
An exhaust gas turbocharging device, comprising:
- a shaft carrying a compressor wheel;
- a fixing element for fixing the compressor wheel on the shaft;
- and
- at least one component fixed on the shaft together with the compressor wheel by the fixing device, wherein at least in a predetermined temperature range an expansion coefficient (α3) of the at least one component is smaller than an expansion coefficient (α1) of the compressor wheel.
Dependencies are inferred from the claim text.