Where did the diesel generator set oil go? Part of it ran into the combustion chamber due to “channeling oil”, was burned or formed carbon deposits, and the other part leaked from the place where the seal was not tight.
The oil generally enters the combustion chamber through the gap between the piston ring and the ring groove, and the gap between the valve and the duct. The direct reason for its intrusion is that the first piston ring threw the lubricating oil attached to it into the combustion chamber due to the sharp drop in its moving speed near the top dead center. Therefore, the matching clearance between the piston ring and the piston, the oil scraping amount and oil scraping capacity of the piston ring, the pressure in the combustion chamber and the oil viscosity are closely related to the oil consumption.
In terms of operating conditions, the viscosity of the oil used is too low, the engine speed and water temperature of the diesel generator set are too high, the deformation of the cylinder liner exceeds the limit, the number of starts and stops is frequent, the engine parts are worn too much, the oil level is too high, etc., which will cause oil consumption. volume increase.
Piston deviation caused by the bending of the connecting rod of the diesel generator set and the failure of the body shaping tolerance to meet requirements traces), is also an important reason for the increase in oil consumption.
The use of twisted rings and combined oil rings has a significant effect on reducing oil consumption, especially the combined oil ring is light in weight, the three-piece structure has no oil pumping effect, and is itself flexible and has good adaptability to the cylinder wall. The sides fit snugly against the ring groove.
Post time: May-11-2022