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Moving parts of turbocharged bearings

wallpapers Products 2020-11-06
A turbocharger bearing is actually an air compressor that increases the intake air volume by compressing air. It uses the inertial impulse of exhaust gas discharged from the engine to push the turbine in the turbine chamber, and the turbine drives the coaxial impeller. The impeller presses the air sent from the air filter pipe to pressurize it into the cylinder. When the engine speed increases, the exhaust gas discharge speed and the turbine speed also increase simultaneously, and the impeller compresses more air into the cylinder. The increase in air pressure and density can burn more fuel, increase the amount of fuel and adjust the engine speed accordingly. The output power of the engine can be increased.
The so-called turbocharger bearing is the bearing in the turbocharger. To understand the turbocharger bearing, we must first know the turbocharger and its moving parts.
What are the moving parts of  turbocharged bearings?
The moving parts of the turbocharger are also the core components—turbine impeller, compressor impeller and rotor shaft. There are high-speed relative motions between the turbocharger housing and the turbocharger housing. This kind of speed cannot be withstood by ordinary bearings, so The bearing of the supercharger is a special floating bearing.
It is actually a copper ring sleeved on the shaft and the shell, and there is a gap between the ring and the shaft and the ring and the bearing seat. When the engine is working, under the action of the oil pressure, a double oil film is formed in these parts, and the rotor actually floats on the oil film and rotates at high speed.
Due to the extremely high speed and high temperature, this part also has extremely high requirements for lubrication and cooling.
If the supercharger cannot get good lubrication and cooling, it will cause abnormal wear of the bearing, greatly shorten the service life of the bearing, increase the gap between the rotor and the housing, and part of the oil will enter the intake pipe or exhaust pipe from this part , Leading to serious oil burning failure.

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Tag: bearings   turbocharged