Reasons for Generator Accessories Failure
The information comes from:the Internet posted on:2023-06-14
There are multiple forms of pressure seals used in the engine, such as between the cylinder liner piston ring, and between the turbocharger rotor shaft. This type of seal is usually fully functional when the engine has about one-third of the load, and slight leakage may occur when the load is small. Therefore, foreign engine manufacturers generally emphasize it in their user manuals.
If the unit operates under low load, the following faults may occur in the generator accessories as the operating time continues:
1. The piston cylinder liner seal is not good, causing oil to flow up and enter the combustion chamber for combustion, resulting in blue smoke from the exhaust.
For turbocharged diesel engines, due to low load and no load, the boost pressure is low. It is easy to cause a decrease in the sealing effect of the generator accessory turbocharger oil seal (non contact type), causing oil to flow into the turbocharger chamber and enter the cylinder along with the intake air.
3. A portion of the oil that flows up to the cylinder participates in combustion, while a portion of the oil cannot be completely burned and forms carbon deposits at the valves, intake ports, piston crown, piston rings, etc., while another portion is discharged with the exhaust. In this way, oil will gradually accumulate in the exhaust duct of the cylinder liner, and carbon deposits will also form.
4. If the oil accumulates to a certain extent in the turbocharger chamber of the generator accessory turbocharger, it will leak out from the junction surface of the turbocharger.
5. Long term low load operation will lead to more severe wear and tear on the moving parts of the generator components, deterioration of the engine combustion environment, and other consequences that may lead to an early overhaul period.
