Since there are many pressure seals in the diesel generator set, such as between the cylinder liner-piston-piston ring and the supercharger-supercharger rotor shaft, this seal is generally only about 1/3 of the load on the engine. Fully functioning, if the diesel generator set is running under a small load, with the continuation of the running time, the following faults will occur: (Yanan Motor Answer)
1. Piston-cylinder liner is not well sealed, the oil is on the sputum, enters the combustion chamber to burn, and exhausts blue smoke.
2. For supercharged diesel engines, the boost pressure is low due to low load and no load. It is easy to cause the sealing effect of the supercharger oil seal (non-contact type) to drop, and the oil enters the plenum chamber and enters the cylinder along with the intake air.
3. A part of the oil from the upper chamber to the cylinder participates in the combustion. Some of the oil cannot be completely burned, and carbon deposits are formed at the valve, the intake port, the piston top, the piston ring, etc., and some are discharged with the exhaust gas. In this way, the oil will gradually accumulate in the exhaust duct of the cylinder liner, and carbon deposit will also form.
4. The supercharged indoor oil of the supercharger accumulates to a certain extent and will leak from the joint surface of the supercharger.
5. Long-term low-load operation will result in more serious wear and tear of moving parts, deterioration of engine combustion environment and other consequences leading to the overhaul period.
In summary, the long-term low-load use of diesel generator sets causes problems of exhaust, carbon deposition and leakage. These problems are not easy to solve, so the motor emphasizes that low-load or no-load operation time should be minimized, and The small load can not be lower than 25%-30% of the rated power of the unit, so as to reduce the problems caused by low load, I hope everyone can apply what they have learned.
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