Why diesel generator set is not suitable for continuous low load operation
2021-07-16
What is the reason why the diesel generator set is not suitable for continuous low load operation? Today, Raines will answer this question. Because many parts of some brand diesel generator sets adopt the form of pressure seal, such as the cylinder liner, piston, piston ring, turbocharger and turbocharger rotor shaft, this kind of seal generally plays a full role when the engine has about 1 / 3 load, When the load is small, slight leakage may occur.
The reasons why it is not suitable for continuous low load operation are as follows:
1. The piston and cylinder liner are not well sealed, the engine oil escapes upward, enters the combustion chamber for combustion, and the exhaust emits blue smoke.
2. A part of the engine oil that moves up to the cylinder takes part in the combustion. A part of the engine oil can't burn completely and forms carbon deposits at the valve, intake port, piston crown, piston ring, etc. and a part of the engine oil is discharged with the exhaust. In this way, oil will gradually accumulate in the exhaust passage of the cylinder liner, and carbon will also form.
3. For turbocharged diesel engine, because of low load and no-load, the boost pressure is low. It is easy to cause the sealing effect of supercharger oil seal (non-contact type) to decline, and the oil flows into the supercharger chamber and into the cylinder with the intake air.
4. When the oil in the supercharger chamber of the diesel generator set accumulates to a certain extent, it will leak out from the joint surface of the supercharger.
5. Long term small load operation will lead to more serious wear of moving parts, deterioration of combustion environment of diesel generator set engine, which will lead to the early overhaul period.
The reasons why it is not suitable for continuous low load operation are as follows:
1. The piston and cylinder liner are not well sealed, the engine oil escapes upward, enters the combustion chamber for combustion, and the exhaust emits blue smoke.
2. A part of the engine oil that moves up to the cylinder takes part in the combustion. A part of the engine oil can't burn completely and forms carbon deposits at the valve, intake port, piston crown, piston ring, etc. and a part of the engine oil is discharged with the exhaust. In this way, oil will gradually accumulate in the exhaust passage of the cylinder liner, and carbon will also form.
3. For turbocharged diesel engine, because of low load and no-load, the boost pressure is low. It is easy to cause the sealing effect of supercharger oil seal (non-contact type) to decline, and the oil flows into the supercharger chamber and into the cylinder with the intake air.
4. When the oil in the supercharger chamber of the diesel generator set accumulates to a certain extent, it will leak out from the joint surface of the supercharger.
5. Long term small load operation will lead to more serious wear of moving parts, deterioration of combustion environment of diesel generator set engine, which will lead to the early overhaul period.