Remember six 'don'ts' when operating a generator set

We all know that in operationGenerator setOperators must develop good operating habits and consciously abide by operating specifications, so as to extend the service life of the generator set and improve work efficiency. However, in the actual operation process, many operators still have bad habits. Therefore, Haixing has summarized six 'don'ts' for everyone to compare.

(1) Do not start the cold engine and then run it under load without warming it up.
When the diesel engine is cold started, due to the high viscosity and poor fluidity of the oil, the oil pump supplies insufficient oil. The friction surface of the machine is poorly lubricated due to lack of oil, resulting in rapid wear and even failures such as cylinder pulling and tile burning. Therefore, after the diesel engine is cooled and started, it should be run at idle speed to warm up, and then run with load when the standby oil temperature reaches above 40°C; the machine should be started in low gear, and sequentially drive for a certain mileage in each gear until the oil temperature is normal and the oil supply is sufficient. After that, you can switch to normal driving.

(2) Do not operate the diesel engine when the engine oil is low
At this time, insufficient oil supply will cause insufficient oil supply to the surfaces of each friction pair, resulting in abnormal wear or burns. For this reason, it is necessary to ensure that there is sufficient engine oil before starting the machine and during the operation of the diesel engine to prevent cylinder pulling and tile burning failures caused by lack of oil.

(3) Do not make an emergency stop with load or stop immediately after suddenly removing the load.
After the diesel engine stalls, the circulation of cooling water stops, the heat dissipation capacity decreases sharply, and the heated parts lose cooling, which can easily cause the cylinder head, cylinder liner, cylinder block and other mechanical parts to overheat, produce cracks, or cause the piston to overexpand and get stuck in the cylinder liner. On the other hand, if the diesel engine is stopped without idling to cool down, the friction surface will be insufficiently oiled. When the diesel engine is started again, poor lubrication will aggravate wear and tear. Therefore, the load should be unloaded before the diesel engine stalls, and the speed should be gradually reduced and run without load for a few minutes.

(4) Do not slam the accelerator after starting a cold engine
If the accelerator is pressed hard, the diesel engine speed will increase sharply, which will cause some friction surfaces on the equipment to be severely worn due to dry friction. In addition, when the throttle is hit, the force received by the piston, connecting rod and crankshaft changes greatly, causing violent impact and easily damaging the parts.

(5) Do not operate when the cooling water volume is insufficient or the cooling water and oil temperatures are too high.
Insufficient cooling water of the diesel engine will reduce its cooling effect, and the diesel engine will overheat because it cannot be effectively cooled; too high temperatures of cooling water and engine oil will also cause the diesel engine to overheat. At this time, the cylinder head, cylinder liner, piston components and valves are mainly subjected to large thermal loads, and their mechanical properties such as strength and toughness decrease sharply, which increases the deformation of the parts, reduces the fitting clearance between parts, accelerates the wear of the parts, and in severe cases Failures such as cracks and mechanical parts getting stuck may also occur. Excessively high temperatures of cooling water and engine oil will accelerate the aging, deterioration and burning loss of the engine oil, and the viscosity of the engine oil will decrease. The lubrication conditions of the cylinder, piston and main friction pairs will deteriorate, resulting in abnormal wear. Overheating of the diesel engine will also worsen the combustion process of the diesel engine, causing the injector to work abnormally, causing poor atomization and increasing carbon deposits.

(6) Do not operate when the cooling water and engine oil temperatures are too low.
During the operation of the diesel engine, the cooling water temperature is too low, and the cylinder wall temperature drops accordingly. The water vapor generated by combustion condenses into water droplets, and contacts with the exhaust gas to generate acidic substances, which adhere to the cylinder wall, causing corrosion and wear. Practice has proved that when a diesel engine is often used at a cooling water temperature of 40°C to 50°C, the wear of its parts is several times greater than when it is operated at a normal operating temperature (85°C to 95°C). At this time, when the water temperature is too low, the temperature in the cylinder is low, and the ignition delay period of the diesel engine is extended. Once it catches fire, the pressure rises rapidly, and the diesel engine fuel is rough, which can easily cause mechanical damage to parts. The diesel engine has been running at a low temperature of the cooling water for a long time, and the gap between the piston and the cylinder liner is large, causing cylinder knocking and vibration, causing cavitation in the cylinder liner. The engine oil temperature is too low, the oil viscosity is high, the fluidity is poor, and the oil quantity in the lubricating parts is insufficient, which makes the lubrication worse, causing increased wear of the friction pair and shortening the service life of the diesel engine.

These six 'don'ts' are all summarized by Haixing's experienced staff and are of great significance in actual operations. Everyone should carefully compare and study them so that they can further operate the generator set proficiently and ensure that they are not misunderstood. Misunderstandings may cause harm to the generator set, and the operator's level will also be improved.