How to maintain diesel generator sets in winter? Diesel generator sets also require certain maintenance methods in winter, so that the diesel generator set can be used for a long time.
1. The low temperature of engine fuel in winter can easily increase the viscosity and poor fluidity of diesel, making it difficult to atomize diesel, leading to poor atomization and even worsening of combustion, reducing power. and the performance of the diesel engine decreases, so a light diesel with low freezing point and good ignition performance should be used in winter. It is generally required that the freezing point of the diesel engine be 7-10°C lower than the current local seasonal low temperature.
2. Use an open flame to make it easier to start the machine.
In places where the temperature is too low,You can use an open flame to help start the machine, but the air filter cannot be removed. Dip cotton thread 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, dusty air from the 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 engine to run rough and damage the machine. .
3. Release the water too early or do not release the cooling water.
Run the generator at idle before shutting it down. Wait for the cooling water temperature to drop below 60°C and. the water is not hot, then turn off the motor and release the water. If the cooling water is released prematurely, the body will suddenly shrink and crackement when it will be suddenly attacked by cold air when the temperature is high. When draining the water, the remaining water in the body must be completely drained to prevent it from freezing and expanding, causing the body to burst. Shunjinxing recommends users to use antifreeze regardless of the season. The higher end the generators are, the more antifreeze they must use. Because antifreeze not only plays a cooling role, but also protects the diesel engine.
IV. Selection of lubricating oil
In winter, an engine oil with a low freezing point should be selected. When starting, an external water bath can be used to heat the engine oil. increase the oil temperature. It is not recommended to use an open flame to avoid deteriorating or even burning the oil in the oil pan, reducing or completely losing lubrication performance, ethus increasing the wear and tear of the machine.
5. Starting method
In winter, if possible, it is better to assemble a water heater for the generator. This can keep the machine at a certain “body temperature”. " and can be used easily at any time. operation. In order to quickly start the diesel generator set, some operators often use the abnormal start method of waterless start (start first, then add cooling water). This practice may cause serious damage to the machine and should be prohibited. The correct preheating method is: first cover the water tank with an insulating quilt, open the drain valve and continuously inject water. fresh, clean water at 60-70°C in the water tank when the water flowing out of the drain tap is hot when you touch it with your hand, close the drain tap and then start again. p>
6. Precautions in case oflow temperatures and charging conditions
After the diesel generator set starts and fires, some operators can't wait to start the charging operation immediately. In a diesel engine that has recently caught fire, due to the low body temperature and high oil viscosity, the oil is not easily penetrated into the moving friction surfaces, which will cause significant wear of the machine. Also, piston springs, valve springs and injectors.
1. When it is found that water has entered the generator, if the generator set is running, immediately stop the machine and it is not allowed to be turned on when it is in the shutdown state.
2. Support one side of the mobile generator set with a hard object and lift it so that the oil drain part of the engine oil pan is in the lowest position, unscrew the oil drain plug, remove it.oil dipstick, and the water inside drains out by itself. When the oil is about to drain, let the oil and water drain for a while, then tighten the oil drain plug.
3. Remove the air filter, replace the new filter element and soak it in oil.
4. Remove the intake and exhaust pipes and muffler, and remove any water from the pipes. Turn on the pressure relief, crank the diesel engine to generate electricity, and observe if water flows from the inlet and exhaust ports. If there is water drained, continue to rotate the crankshaft until all the water in the cylinder is drained. Install the intake and exhaust pipes and mufflers, add a little engine oil to the air inlet, crank the crankshaft a few times, then install the air filter.
5. Remove the fuel tank, drain all oil and water from it, check forwater in the fuel system and drain it.
6. Release the waste water into the water tank and water channels, clean the water channels and add clean river water or boiled well water until the water float mounted. Turn on the throttle switch and start the diesel engine. After starting the diesel engine, pay attention to the engine oil indicator rising and listen for any abnormal noise coming from the diesel engine. After checking whether all parts are normal, run the diesel engine. The operating sequence is first at idle, then medium speed, then high speed. The running time is 5 minutes each. After break-in, stop the engine and drain the engine oil. Add new engine oil again, start the diesel engine and run it at medium speed for 5 minutes, then it can be used normally.
7. Disassemble the generator, seeClean the stator and rotor inside the generator, then dry them before assembly.
Users of mobile generator sets should pay attention to protecting the unit after the unit is wet and in humid environments, to ensure the normal operation of the generator set.