What is the cause of the supercharger pumping oil?
1. Insufficient lubrication, causing the supercharger to fail.
When the turbocharger is running at high speed, the speed easily exceeds tens of thousands of revolutions. The turbine rotor shaft in the middle is a precision component that needs to bear tens of thousands of revolutions and high temperature. The function of the oil is to establish an oil film between the rotor shaft and the casing, so as to achieve the effect of lubrication and heat dissipation.
When the diesel engine is working normally, the speed and temperature of the supercharger are extremely high. If the engine is directly turned off, the oil pump will stop working directly, and the supercharger has a slow-speed process, and the intermediate casing and rotor shaft will appear semi-dry friction, which can easily lead to signs of early wear of the turbocharger. As a result, the rotor shaft and oil seal are damaged, resulting in the phenomenon of oil blowing in the supercharger.
2. The oil is not clean and the supercharger is worn.
If the impurity density in the oil is too high, the hard particles in it will scratch the casing and seal rings, resulting in early damage to the turbocharger. If the rotor shaft appears and the oil seal wears early, the high-speed turbocharger will directly take the oil out of the casing, or even enter the engine directly from the intake system to participate in the combustion, resulting in a drop in power and blue smoke in the vehicle. Condition.
3. Large intake and exhaust resistance lead to oil leakage
If the engine intake or exhaust resistance is too high, it will cause a vacuum to form momentarily between the compressor and the turbocharger housing. If the oil seals show signs of early wear, the oil can easily be "sucked out" to the compressor (intake side) position, where it enters the engine directly through the intercooler system.
Under normal circumstances, if the turbocharger is blowing oil, it can be judged by observation. If the turbocharger leaks oil seriously, it will directly take away a large amount of oil, and even the case where the oil is drained in minutes has also occurred. etc. phenomenon.
