Diesel engine crankshaft cooling method and maintenance precautions
How does the diesel crankshaft dissipate heat? What should you pay attention to when repairing the crankshaft of a diesel engine? The following is a small series for everyone to talk about the diesel engine crankshaft cooling method and maintenance precautions, I hope to help everyone.
Diesel engine crankshaft cooling method
Diesel engine crankshaft friction heat dissipation relies on oil splash lubrication and special oil circuit system. The oil also has the function of cooling, cooling and anti-corrosion. The heat flows through the oil to the radiator through the engine cooling system to remove the heat, so as long as the oil is in good condition. It will not affect heat dissipation.
When the crankshaft of the diesel engine is running, the oil can be lubricated and dissipated. The crankcase of the diesel engine is divided into upper and lower parts. The crankcase and the cylinder are integrally cast on the diesel engine and are closed. The lower crankcase of the diesel engine is used to store the oil. The requirements are not high, generally there is a thin steel stamping shape.
The lower crankcase is the so-called oil sump in the machine repair line. The diesel engine crankcase is equipped with a stable baffle to prevent the car from running on the bumpy road and causing the internal oil surface to undulate too much. The bottom of the crankcase of the diesel engine is equipped with oil-discharging screws. The material is generally used to absorb the tiny metal debris generated during the operation of the engine. A cushion is placed between the upper and lower crankshafts to prevent the oil from overflowing.
If the diesel engine crankshaft can be effectively lubricated, its temperature will not be too high. In addition to the heat dissipation capability of the oil, the engine can run stably.
Diesel engine crankshaft maintenance precautions
1. During the repair of the crankshaft of the diesel engine, the crankshaft of the diesel engine should be carefully inspected for defects such as cracks, bending and twisting, and the wear of the bearing bush and the connecting rod bearing bush to ensure the main journal and the main bearing shell, the connecting rod journal and the connecting rod bearing bush. The fit between the gaps is within the allowable range.
2. When the diesel engine crankshaft is repaired, the balance of the flywheel should be ensured.
3. After a major accident such as burning of tiles or cylinders occurs in the internal combustion engine, it is necessary to carry out comprehensive overhaul of the crankshaft of the diesel engine.
4. The crankshaft crack of the diesel engine occurs mostly at the transition fillet between the crank arm and the journal, and at the oil hole in the journal.
The above is about the diesel engine crankshaft heat dissipation method and maintenance precautions. I hope everyone can understand the diesel engine crankshaft heat dissipation method and maintenance precautions, which will help everyone.