Knowledge of cooling system maintenance
1. Selection of cooling water: It is best to use river water with low hardness, such as well water, which should be boiled and softened before use. it is best to use antifreeze.
2. Pay attention to the technical condition of each part: if the radiator leaks, it must be repaired. If the water pump or fan runs or makes abnormal noises, it needs to be repaired. should be repaired in time. If the engine overheats, you must quickly check if there is a lack of water, stop the engine. After cooling, add sufficient cooling water. If the thermostat does not work properly and makes the engine operating temperature too high or too low, it should be repaired or replaced in time.
3. Inspecting and Adjusting Fan Belt Tightness: If the fan belt tightness is toolow, it not only affects the cooling air volume and increases the workload of the engine, but also accelerates belt wear due to slipping. If the belt is too tight, it will accelerate wear on the water pump bearings and generator bearings. Therefore, the tightness of the belt should be checked during use and adjusted if necessary. If it does not comply with regulations, it can be adjusted by changing the position of the generator and the adjustment arm.
4. Clean the scale regularly: After a certain period of engine use, scale will be deposited in the water tank and radiator, which will affect heat dissipation. It must therefore be cleaned regularly. The cleaning method is to add sufficient cleaning fluid to the cooling system. After some time of soaking, start the engine and run it at low to medium speed pfor a while, then release the cleaning fluid while it is hot. then rinse it with clean water.
What are the cooling water requirements of generators?
Such problems are easy to occur in winter. Let's take a look at the following points that need to be paid attention to during use. diesel generator sets in winter, hope this is helpful for you. Precautions for use 1
Do not release water too early or do not release cooling water at all. The diesel generator must idle before stopping. Wait until the temperature of the cooling water drops below 60°C and the water is not hot for your hands, then turn it off and drain the water. If the cooling water is released prematurely, the diesel generator body will shrink and crack suddenly when suddenly invaded by cold air when the temperature is high. During theWhen draining the water, the remaining water in the diesel generator body must be completely drained to prevent it from freezing and expanding, causing the body to burst.
Usage Note 2
Do not use fuel randomly. The low temperature in winter deteriorates the fluidity of diesel fuel, its viscosity increases, and it is difficult to spray, resulting in poor atomization and worsening combustion, leading to a decrease in the power and economic performance of the diesel generator. Therefore, light diesel fuel with low freezing point and good ignition performance should be used in winter. It is generally required that the freezing point of diesel generators be 7-10°C lower than the local minimum temperature of the current season.
Usage Note 3
: Avoid using open flames to facilitate combustion and starting. The air filter cannot be removed.Dip cotton gauze in diesel fuel and light it to make a fire starter and place it in the intake pipe to start combustion. In this way, during the starting process, the dusty air from outside will be directly inhaled into the cylinder without filtering, causing abnormal wear of the piston, cylinder and other parts. This will also cause the diesel generator to run rough and damage the machine. .
Usage Note 4
Do not cook the oil pan with an open flame. To prevent the engine oil in the oil pan from deteriorating or even burning, lubrication performance will be reduced. Little or complete loss, thus worsening machine wear. In winter, low freezing point engine oil should be used. When starting, an external water bath can be used to heat the engine oil to increase the oil temperature.
Noteusage 5
Do not use improper starting methods. In winter, in order to quickly start the diesel engine, some drivers often use the abnormal starting method of waterless starting (start first, then add cooling water). This practice can cause serious damage to the machine and should be prohibited.
The correct way to preheat is to first cover the water tank with an insulating quilt, open the drain valve, and continuously inject fresh, clean water at 60 -70°C in the water tank if water leaks. of the drain valve is hot when you touch it with your hands, then close the drain valve, pour clean fresh water at 90-100°C into the water tank, and rotate the crankshaft to ensure that all moving parts are properly pre-lubricated. , then start again.
User Note 6
Diesel generators should not beused under low temperature load. After the diesel generator started to catch fire, some drivers were eager to get it started immediately. For a diesel generator that has recently caught fire, due to the low body temperature and high oil viscosity, it is difficult for the oil to fill the friction surface of the moving pair, which will result in a significant wear of the machine. Additionally, piston springs, valve springs and injector springs are also prone to breakage due to "cold brittleness". Therefore, once the diesel generator starts and catches fire in winter, it should idle at low and medium speed for a few minutes, and then put into load operation when the cooling water temperature reaches 60°C .
Usage Note 7
Do not pay attention to the thermal insulation of the body. Low temperaturein winter can easily cause excessive cooling of the diesel generator during operation. Insulation is therefore the key to properly using diesel generators in winter. In the northern region, diesel generators used in winter must be equipped with cold protection equipment such as insulating sleeves and insulating curtains.
Cooling water quality requirements for large generators (hollow stator copper wires):
1, PH value (25℃) 8.0-9..0
2. Conductivity (25℃) 0.4-2μs/cm
3. Copper content ≤20μg/L. < /p>
4. Dissolved oxygen ≤30μg/L