1. Circulating water volume

The reason for the lack of safety of diesel engine cooling is because of the amount of cooling water, and the inability to continuously cool the diesel engine with cooling water will cause it to continuously heat; the diesel engine overheats because the temperature of these media is too high. When the mechanical properties such as strength and toughness are not qualified, the cylinder head, cylinder liner, piston assembly and valve will be subject to heavy thermal load, which will increase the deformation of the parts, reduce the gap between the parts, accelerate the wear of the parts, and even show cracks. , The phenomenon of machine parts jamming. The engine oil is too hot. The engine oil has changed. Diesel engines require smooth parts that cannot be effectively smoothed, resulting in abnormal wear. In addition, when the temperature of the diesel engine is too high, its combustion power is reduced, forming a fuel injection nozzle that cannot be used effectively and damages the fuel injection nozzle. View judgment:

(1) Check carefully whether the coolant is required before starting the diesel generator;

(2) When the diesel generator is running, pay attention to check if there is any leakage of the coolant, such as the radiator, water pump, cylinder block, heater water tank, water pipe, and rubber connecting hose and water drain switch.

2. The water supply power of the water pump is low

The abnormal operation of the water pump causes the water pressure to fail to meet the normal requirements, which will also reduce the flow of cooling circulating water. The activity of circulating cooling water depends on the energy supplied by the pump operation. The water pump continuously sends 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 supplied by the water pump can not deliver the cooling water to the system in time, resulting in a decrease in the circulating water flow in the cooling system, resulting in poor heat dissipation of the system, and then causing the cooling water temperature to be too high.

Check the judgment: Hold the water outlet pipe connected to the radiator tightly with your hand, from idle speed to. If you feel the flow of circulating water is increasing, it is considered that the pump is operating normally. Otherwise, it means that the pump is operating abnormally and should be overhauled.

3. Scaling and blockage of the circulatory system pipeline

The fouling of circulatory system pipes should be concentrated on the radiator, cylinder, and water jacket. When the deposited scale accumulates too much, the cooling water's heat dissipation function will decrease, which will cause the water temperature to rise. The main components of scale are carbonic acid and carbonic acid, which have poor heat transfer ability. The scale deposits adhere to the circulation system, which seriously affects the heat generation in the engine. If the situation is serious, the circulation pipeline is blocked, and the circulation water is blocked, which reduces the ability to absorb heat and causes the cooling water temperature to be too high. Spring Breeze Cummins diesel generator stipulates that the coolant is 5 coolant + 5 distilled water + DCA4. When the added coolant is not in compliance with regulations, and when the added water is hard water containing a lot of ions, the pipeline will be blocked and the cooling circulation system will work abnormally.