What are the characteristics of cylinder liner wear of Perkins diesel generator set

What are the characteristics of diesel generator engine cylinder liner wear process?

1. Diesel engine in the run-in test run stage, because of the cylinder liner and piston ring surface micro roughness is large, so wear is very strong. After running in the normal technical condition, due to good fitting between the parts, the lubrication condition is improved, in a long working time, the wear is slow and uniform. Finally, when the cylinder clearance exceeds a certain value due to wear, due to gas and oil leakage and percussion of moving parts and other factors, wear and tear.

2. Because the cylinder liner along the height direction of wear is not the same everywhere, the size of wear changes with the temperature, pressure and lubrication conditions. Under normal wear conditions, maximum wear occurs near the location of the first gas ring when the piston is at TDC. Because of the high temperature and poor lubrication conditions, the wear resistance of the metal decreases, and the piston exerts maximum pressure on the inner wall of the cylinder liner due to the action of the gas. The middle of the cylinder liner is rich in oil film, which can maintain favorable lubrication conditions and protect the cylinder liner from serious wear and corrosion, so the wear is relatively small. Piston near the bottom dead center, due to low sliding speed, oil film is not easy to form, cylinder liner wear is slightly larger than the middle. Use of poor maintenance or other artificial reasons, can also make the cylinder liner in a short period of time a lot of wear, called abnormal wear. For example, when the air filter efficiency is poor or short circuit wear; Wear and tear caused by poor oil filtration or deterioration contamination.

3. When the diesel engine uses high sulfur fuel or starts frequently at low temperature, there will be corrosion wear. The first piston ring is subjected to intense acid corrosion near TDC, and the wear amount is 1-2 times larger than normal wear. At this time, the wear of the middle also increased by 4 ~ 6 times, mainly due to the abrasive wear caused by the peeling metal particles.

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