Cummins diesel generator set cylinder liner wear will appear what characteristics

What characteristics will appear in the cylinder liner wear process of diesel generator set engine:

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

2. Because the wear situation of the cylinder liner along the height direction is not the same, the size of the wear varies with the temperature, pressure and lubrication conditions. In the case of normal wear, maximum wear occurs near the location of the first gas ring when the piston is at top dead center. Because of the high temperature and poor lubrication conditions, the wear resistance of the metal is reduced, and because of the action of gas, the piston pressure on the inner wall of the cylinder liner is also the greatest. The oil film in the middle of the cylinder liner is rich, which can maintain favorable lubrication conditions and protect the cylinder liner from serious wear and corrosion, so the wear is relatively small. Near the bottom dead center of the piston, due to the low sliding speed, the oil film is not easy to form, and the wear of the cylinder liner is slightly larger than that in the middle. The use of poor maintenance or other man-made reasons can also make the cylinder liner appear in a short period of time a lot of wear, called abnormal wear. For example, wear when the efficiency of the air filter is poor or short circuit; Wear and tear caused by poor oil filtration or deterioration.

3, When the diesel engine uses high sulfur content fuel or starts frequently at low temperature, there will be corrosion wear. The first piston ring is subjected to strong acid corrosion near top dead center, and the wear is 1 ~ 2 times larger than normal wear. At this time, the wear in the middle also increases 4 ~ 6 times, mainly due to the abrasive wear caused by the corrosion of the exfoliated metal particles.

As can be seen from the above, in order to extend the service life of the cylinder liner, we must strictly abide by the operating procedures, careful maintenance, and eliminate all factors that may cause abnormal wear. In particular, good filtration, oil off, so that the oil net air net.

Jiangsu Meao Power Technology Co., Ltd. is an important manufacturer of diesel generators. The company mainly manufactures and sells diesel generator sets with power of 3-3000kW, mobile power station of 24-600kW, Marine emergency diesel generator set of 24-800kW, gas generator set, heavy oil generator set and all kinds of imported series, special series (trailer, static speaker, mobile lighthouse, container, etc.) diesel generator At the same time, we are engaged in generator set maintenance and after-sale service of generator set accessories.