During the operation of the Volvo generator set brand, the cooling water temperature is too low, and the cylinder wall temperature decreases accordingly. The water vapor generated by combustion condenses into water droplets, which come into contact with exhaust gas to form acidic substances and adhere to the cylinder wall, causing corrosion and wear. Volvo generator sets have been operating at low cooling water temperatures for a long time, resulting in a large gap between the piston and cylinder liner, causing knocking and vibration, resulting in cavitation of the cylinder liner. The oil temperature is too low, the viscosity of the oil is high, and the fluidity is poor. The insufficient amount of oil in the lubrication area leads to poor lubrication of the Volvo generator set, which increases the wear of the friction pair of the Volvo generator set and shortens the service life of the Volvo generator set.
Insufficient cooling water can reduce the cooling effect of Volvo generator sets. Volvo generator sets overheat due to ineffective cooling, and excessive oil temperature of cooling water and oil can also cause Volvo generator sets to overheat. At this time, the cylinder head, cylinder sleeve, piston components, and valves of the Volvo generator set are mainly subjected to high heat loads. Their mechanical properties, such as strength and toughness, sharply decrease, causing increased deformation of the parts, reducing the fit gap between the parts of the Volvo generator set, accelerating the wear of the parts, and even producing cracks and stuck parts in severe cases. Overheating of Volvo generator sets can also worsen the combustion process of diesel engines, causing malfunctioning of the fuel injectors, poor atomization, and increased carbon deposition.
After the shutdown, the circulation of water in the cooling system of the Volvo generator unit stops, and the heat dissipation capacity sharply decreases. The heated parts lose cooling, which can easily cause overheating of the cylinder head, cylinder liner, cylinder block and other components of the Volvo generating set, resulting in cracks or excessive expansion of the piston and jamming in the cylinder liner. On the other hand, if the Volvo generator set is shut down without idle cooling, it will cause insufficient oil content on the friction surface of the Volvo genset. When the Volvo generator unit is restarted, it will intensify wear due to poor lubrication. Therefore, before the Volvo generator unit shuts down, the load should be removed and the speed should be gradually reduced and the unit should run at no load for a few minutes.
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