Reasons for Low Circulating Water in Diesel Generators Cooling System

The reason for the poor cooling effect of diesel generators is that the amount of cooling water is scarce, and the inability to continuously cool the diesel generators with cooling water will lead to continuous heating; the overheating of diesel generators is because the temperature of these media is too high.

When the mechanical properties such as strength and toughness cannot reach the standard, the cylinder head, cylinder liner, piston assembly and valve lamp are mainly subjected to a large thermal load, which increases the deformation of the parts, reduces the matching gap between the parts, accelerates the wear of the parts, and even occurs. Cracks, the phenomenon of parts stuck. Excessive temperature will cause the oil to deteriorate and its viscosity to decrease. The parts that need to be lubricated inside the diesel generator cannot be effectively lubricated, resulting in abnormal wear. In addition, when the temperature of the diesel generator is too high, its combustion efficiency is reduced, causing the fuel injection nozzle to fail to work effectively and damage the fuel injection nozzle.

Inspection and judgment: Before starting the diesel generator, it is necessary to check whether the coolant meets the requirements; during operation, pay attention to check whether there is leakage of the coolant, such as the radiator, water pump, cylinder block, heater water tank, water pipe, as well as rubber connecting hose and water drain switch place.

The abnormal water supply of the water pump causes the water pressure to not meet the normal requirements, and also reduces the flow of the cooling circulating water. The flow of circulating cooling water is provided by the energy provided by the operation of the water pump. The water pump continuously presses the cooling water to the radiator for cooling, and the cooled water is sent to the engine water jacket to cool the engine. When the water pump works abnormally, the pump energy provided by the water pump is not enough to press the cooling water into the system in time, resulting in the reduction of the circulating water flow in the cooling system, resulting in poor heat dissipation effect of the system, resulting in excessive cooling water temperature.

Check and judge: Hold the water outlet pipe connected to the radiator with your hand, from idle speed to high speed, if you feel that the flow of circulating water continues to increase, it is considered that the water pump is operating normally. Otherwise, it means that the pump is abnormal and should be repaired.

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