1. Draining the cooling water from the diesel generator should be carried out when the water temperature drops after 15 minutes of stopping.
2. When discharging water, you should pay attention to the specific water flow conditions to see whether the water flow is smooth and whether the water flow becomes smaller or faster and slower.
3. When the cooling water stops flowing, it is best to shake the diesel generator several times. At this time, the remaining cooling water that does not flow easily will flow out. to the vibrations of the device.
4. After water draining is completed, the water drain switch should be turned on to prevent cooling water from flowing out for various reasons.
Yanan Engine
Correct methods and precautions for using water in diesel generators
Since the external ambient temperature of the power setDiesel ogen is too low, the cooling water must be drained before shutdown. Do it after 15 minutes when the water temperature has dropped, but not immediately, otherwise the temperature difference between the fuselage and the external environment will be too large, resulting in some parts of the diesel generator set being damaged. become deformed, thereby affecting the performance of the diesel engine (such as cylinder head deformation and other problems).
When draining water, you can't turn on the water release switch and everything will be fine. You also need to pay attention to the specific water flow conditions to see if the water flow is smooth and the water is good. the flow becomes smaller or faster and slower. If these conditions occur, it means that the cooling water contains impurities that hinder the normal flow of water. At this point it is best to remove the drain switche of water and allow the cooling water to flow directly from the body. If the water flow is still not smooth, use hard, thin steel objects such as wire to dredge it until the water flow is smooth.
When the cooling water stops flowing, it is best to shake the diesel generator several times. At that time, the remaining cooling water that is not easy to flow will flow out because of the cooling water. vibration of the diesel engine, thereby preventing the water plug on the cylinder head from being frozen and the cooling water flowing into the oil pan in the future. The operator should also note that if the water drain switch is not removed, the water drain switch must be in the open state after water draining is completed to avoid the remaining cooling water cannot flow temporarily for various reasons and freezes. the picorresponding parts of the diesel engine.
Confirmation and repair of radiator leaks:
1. Block the radiator inlet and outlet and install a radiator from the overflow pipe or Connect drain plug. the seal and the pump in 0.15-0.3 kgf/cm2 of compressed air. Place the heater in the pool. If there are bubbles, it's a leak.
2. Check with water. When inspecting, block the water inlet and outlet of the radiator. After filling the inlet with water, observe for water leaks. To make it easier to discover small cracks, you can apply some pressure to the radiator or vibrate the radiator. lightly, then observe carefully, water flows from the leak. Radiator Welding Repair Radiator welding repair generally uses the brazing method. Before welding, wipe off the oil at the welding place, then use a scraper to scrape the newnew metal layer, then heat it appropriately. Once the soldering iron is heated, dip it into the zinc oxide solution, then apply solder. After bonding, smooth the solder and use hot water to remove oxidation around the solder. Zinc cleans to prevent corrosion.
3. Welding repair of upper and lower water chambers. If the leak in the upper and lower water chambers is small, you can repair it directly with solder. If the leak is large, use a purple steel sheet. to repair it. When repairing by welding, first apply a layer of solder to one side of the steel skin and the leak area, place the steel skin on the leak area, and then use a soldering iron to heat the outside in order to melt the solder and weld the surrounding area. firmly.
The correct use of the water tank of the generator setesel
The water tank of the diesel generator set plays an important role in the whole body of the generator set. Improper use of water tanks will damage the diesel engine and generator and in severe cases may result in scrapping of the diesel engine. So it is very important to use the water tank of the diesel generator correctly.
1: Choose soft, clean water
Soft water generally includes rainwater, snow water, river water, etc. This water contains few minerals and is suitable for engine use. Well water, spring water and tap water contain high mineral content. These minerals are easily deposited on the water tank wall, water jacket and water channel wall when heated to form scale and rust, which deteriorates the heat dissipation ability of the motor and easily causes the motor. overheat. LThe added water must be clean. Impurities in the water will block the water channels and worsen the wear of the water pump impeller and other components. If hard water is used, it must be softened first. Softening methods typically include heating and adding lye (usually caustic soda).
2. Do not start the machine first and then add water
Some users, in order to facilitate starting in winter, or because the water source is far away, often start the machine first, then add water, this method is very harmful. After the engine is started dry, because there is no cooling water in the body, the engine parts heat up quickly, especially the cylinder head and the water jacket outside the injector of the diesel motor. If cooling water is added at this time, the cylinder head. and the water shirt will do it. It's easy to fcrack or warp due to sudden cooling. When the engine temperature is too high, the engine load should first be removed and then idle at low speed. When the water temperature is normal, add cooling water.
3. When "boiling", avoid burns.
After the water tank is "boiled", do not blindly open the water tank cover to avoid burns. . The correct approach is: first let the engine idle for a while, then turn off the generator. Wait for the generator temperature to drop and the pressure in the water tank to drop before unscrewing the water tank cover. When unscrewing, cover the lid with a towel or car rag to prevent hot water and steam from being splashed on your face and body. Never point your head directly towards the tanksee water and look down. Quickly remove your hands after unscrewing it. When there is no heat or steam, remove the water tank cover to avoid burns.
4. Water heating in winter
In cold winter, it is difficult to start the generator if cold water is added before starting, it will start easily. cause damage during the water filling process or when water is added but does not start in time, the water chamber and water inlet pipe of the water tank are likely to freeze, preventing the water from circulating and even causing the water tank to swell and crack. Adding hot water can, on the one hand, increase the engine temperature to make starting easier, on the other hand, it can try to avoid the freezing phenomenon mentioned above.
5. Antifreeze must be of high quality
Antifreeze currently on the marketLiquid quality varies and beaMany of them are of poor quality. If the antifreeze does not contain preservatives, it will seriously corrode the engine cylinder head, water jacket, radiator, water blocking ring, rubber parts and other components. At the same time, a large amount of scale will be produced, resulting in poor quality. heat dissipation of the motor and cause motor overheating. Therefore, be sure to choose products from regular manufacturers.
6. Fill the fresh water in time
After filling the water tank with antifreeze, if you find that the liquid level in the water tank has dropped, make sure that there is no leak. Just add clean, fresh water (distilled water is best), because the boiling point of commonly used ethylene glycol antifreeze is high and what evaporates is the water contained in antifreeze. antifreeze and just add fresh water. He coJust mentioned: never add unsoftened hard water.
7. Drain the antifreeze in time to reduce corrosion
Whether it is ordinary antifreeze or long-life antifreeze, when the temperature becomes high, it will do so. should be released in time to avoid corrosion of the enlarged parts. Because the preservatives added to antifreeze will gradually decrease or become invalid as the use time increases, and even worse, some simply do not add preservatives, which will have a strong corrosive effect on mechanical parts, so it should release the antifreeze in time according to the temperature conditions, and the cooling pipeline should be carefully cleaned after releasing the antifreeze.
8. Change the water regularly and clean the pipes
It is not recommended to change the cooling water frequently, because after a period of use, the minedmetals present in the cooling water have precipitated. Unless the water is very dirty and likely to clog pipes and radiators, do not replace it easily, because even though the newly replaced cooling water has been softened, it still contains some minerals, and these minerals. will settle in the water. The more frequently the water is replaced, the more minerals precipitate and the thicker the scale becomes. Therefore, the cooling water should be replaced regularly according to the actual situation. The cooling pipe must be cleaned when replacing. The cleaning solution can be prepared with caustic soda, kerosene and water. At the same time, maintain each drain switch, especially before winter. Replace damaged switches in time. Do not replace them with bolts, wooden sticks, rags, etc.
9. Open the water tank cover when emptyingwater.
If you do not open the water tank cover when draining the water, although the cooling water may flow out partially, it will not It will not flow like water inside the radiator. Reducing the water volume will cause a certain degree of vacuum due to the tightness of the water tank, which will slow or stop the water flow in winter. parts will freeze due to incomplete drainage of water.
10. It is not advisable to drain the water immediately when the temperature is high.
Before the engine stalls, if the engine temperature is very high, do not stop the engine immediately to drain the water. The load must first be removed to allow. It idles and waits for the water temperature to drop to 40-50°C before draining the water to avoid the temperature of the outer surface of the cylinder. , the cylinder head and the water jacket in contact with the water fall and shrinknt abruptly due to the sudden release of water, while the temperature inside the cylinder is still very low. High and low shrinkage, it is easy to cause cracks in the cylinder block. and the cylinder head due to excessive temperature difference between the inside and the outside.
11. Idle the engine after draining the water in cold winter
In cold winter, after draining the engine cooling water, you should start the engine and let it idle for a few minutes. This is mainly because some water may remain in the water pump and other parts after draining. After restarting, the temperature of the engine body may dry it out. Dry the residual moisture in the water pump and other places to ensure that there is no water in the engine. Add antifreeze in time and drain the coolant pto avoid water leaks caused by. freezing of the water pump and tearing of the hydraulic seal.