Car turbocharger function and construction
The turbine of the car consists of two parts, one is the fresh air supercharging end, the other is the exhaust gas driving end, and there is an impeller at each end. On the same shaft, the shaft is supported by a bushing.
The rotational power of the turbocharger wheel comes from the exhaust gas. The turbocharger housing is made of nickel, chromium and silicon alloy, and the shaft is made of chromium and molybdenum alloy.
More importantly, the turbocharger works under high temperature and high speed conditions. In order to ensure its normal operation, oil and coolant are introduced into the turbocharger to ensure effective lubrication and cooling and improve working conditions.
The exhaust gas with high temperature and certain pressure from the engine enters the supercharger, and the impeller that pushes the shaft rotates at a high speed of tens of thousands or even hundreds of thousands of revolutions per minute. Under load, the impeller speed can reach 135,000 rpm, and ordinary bearings cannot withstand the high temperature and wear caused by such a high speed.