The structure and working principle of Turbocharger

The structure and working principle of Turbocharger
In short, the turbocharger including a turbine stage of a compressor stage and connecting the two levels of bearing system. It uses the engine’s exhaust gas energy acting to increase engine power, torque and thermal efficiency.
Turbine stage consists of two components: the turbine and the collector (known as the volute). Into the exhaust gas turbine volute, and a turbine. Through the gas turbine blades and then discharged from the exhaust outlet area.
Determines the speed of the turbine engine rotation speed. When the engine is idling, the turbine rotating the slowest. Gas through the volute more turbine rotation was also faster.
Relative to the turbine stage and the gas pressure level, which includes the pressure of the impeller and the pressure shell. Pressure forged steel impeller shaft and through a turbine connected. Pressure began to inhale the air impeller rotation, with the rotating blades to compress air. Pressure shell will be transformed into high-pressure low-speed high-speed air flow, we will expand this process is called pressure. Pressure air into the shell, the temperature of air temperature, away, the temperature rose to 200 ° C. As the heated air in the lower density, if after entering the compressor and then cooled, so more air can enter the engine. This process we call the cold, it is divided into water-cooled or air-cooled.
Turbocharger bearing system is lubricated from the engine oil. Under pressure, the oil through the middle of the shell, floating bearings and thrust bearings. Oil lubricated bearing system can not only, but also take away heat from the turbine.
Floating is a full floating bearing rotation type. Floating bearing oil film surface by the role of floating. For example, between the bearing shell and the floating, floating the gap between the bearing and shaft form a film, the bearing clearance is less than the diameter of the hair. Dirty oil, oil hole plug will cause turbocharger failure.