What Are the Causes of Overheating of Diesel Generator?

What are the causes of overheating of diesel generators? The first reason is the heat dissipation, cooling and the clogging of the lubrication system, which causes the diesel engine to overheat. The second reason is the leakage of the cooling system and the lubricating oil system, which causes the diesel engine overheat.

What kind of situation will cause the diesel engine overheat?

1. Heat dissipation, cooling and clogging of the lubrication system cause the diesel engine to overheat.

Blockage of radiator or pipeline: once the radiator and pipeline are blocked, the cooling water cannot circulate and the diesel generator will overheat.

Exhaust pipe blockage:When the exhaust pipe is blocked, when the diesel generator is running, the exhaust gas is not discharged smoothly, and some of the exhaust gas remains in the cylinder. When the next intake stroke is intake, there are more in the cylinder. Exhaust gas, fresh oil and gas mixture can not fully come in. When the spark plug is ignited, the flame propagates and burns slowly, and then burning time is long, forming a post-combustion. Parts that are in contact with gas, because of the long burning time, can not release heat, thus causing overheating, at the same time, due to the unsmooth exhaust gas emissions, the exhaust gas temperature rises significantly when exhausting, and the thermal load of the entire diesel generator increases, causing the generator to appear overheat.

Oil filter plugging: Under normal conditions, the oil of the diesel generator enters the diesel engine through the oil filter. Once the oil filter is blocked, the oil enters the lubrication points of the diesel engine only through the bypass passage. In this way, since the oil is not filtered, it is easy to bloc the oil pipeline, causing poor lubrication, the oil pipeline is blocked, and the heat generated by the friction coupler can not dissipated, causing the generator to overheat.

Oil screen plugging: The oil filter is placed at the inlet of the oil absorber in the oil sump to remove foam and prevent large slag from entering the oil pump. Once the oil filter network is blocked, the supply of lubricating oil to the diesel generator is interrupted, which will cause dry friction of the friction coupler of the diesel generator, which will cause the generator to overheat.

2. The cooling system and the lubrication oil system leak, causing the diesel engine to overheat.

Leakage of the radiator or pipeline: The radiator or pipeline leaks. Because the water storage capacity of the diesel tank is limited, the generator will overheat.

Oil pan or oil pump oil leakage: The oil pan or oil pump oil leakage is mostly caused by loose oil plug or gasket damage. The consequence of the oil sump or oil sump leakage is that the diesel generator oil supply is reduced or interrupted. Since the diesel generator reduces the cooling effect of the oil, the heat of each friction pair of the diesel generator cannot be transmitted, so that the generator is overheated.

3. The main components of the cooling system are damaged.

Deterioration of components such as pumps, oil pumps and cooling fans will directly cause the diesel engine to overheat.

A. The performance of the pump has deteriorated. The function of the water pump is to forcibly circulate the cooling water, send the hot water in the diesel water chamber to the radiator for cooling, and then return to the cooling water chamber. Once the performance of the pump deteriorates, the heat cannot be transmitted in time, causing the diesel engine to overheat.

B. The performance of the oil pump deteriorates. The function of the oil pump is to forcibly press the oil of the oil pan into the friction pair of the diesel engine to be lubricated and cooled. Once the oil pumping capacity of the oil pump drops, a large amount of heat will not be transmitted, causing the diesel engine to overheat.

The reasons for the deterioration of the oil pump performance are as follows. First, the oil pump seal ring is damaged, causing oil leakage.

Second, internal wear.

Third, improper adjustment of the pressure reducing valve.

C. The thermostat is damaged. Damage to the thermostat mat block the cooling water channel, causing the cooling water flow to decrease and the diesel engine to overheat.

D. The cooling fan is damaged and the diesel engine must be overheated.