Common small problems in diesel generator sets

According to stars /Diesel generators组Expert introduction: The oil pressure is too low, then the lubrication cannot perform normal oil reincarnation and pressure lubrication, and the lubrication is not sufficient. Diesel engine overheat will deteriorate the combustion process of diesel engine, so that the injector works abnormal, poor aerosol, and the carbon deposit increases. At this time, the cylinder head, cylinder block, piston assembly and valve are mainly affected by high heat load, and its mechanical functions such as intensity, toughness, etc., which increases the deformation of the parts, reduces the cooperation gap between parts, accelerates the wear, and is grim. It also produces cracks, and the failure of the machine is stuck. Therefore, the machine should pay attention to the observation of the oil pressure gauge or oil pressure indicator of the oil during driving. On the other hand, the diesel engine is not turned down at the time of time, and the friction surface is insufficient. When the diesel engine is started again, wear is wear due to poor lubrication. To this end, the machine should ensure that the oil is sufficient before the operation of the diesel engine, preventing the pull tacho, burning the tile failure due to lack of oil. The engine oil is too low, the oil viscosity is poor, the oil volume of the lubrication is insufficient, which makes the lubrication, resulting in increased friction adhesion, shorten the life of the diesel engine. The cooling water is slowly injected into the water radiator if necessary. Therefore, after the diesel machine is cooled, it should be operated and the temperature is running. When the oil temperature reaches 40 ° C or more, the load is running; the machine should start the low speed gear, and the mileage in each gear is stepped in, until the oil temperature is normal, oil supply is sufficient Once, it can be turned to be normal. Often overload operations, resulting in a long-term crude burning in the cylinder, easily damage the cylinder pad. Cooling water, the oil Wendu will accelerate the aging of the oil aging and burn, and the oil viscosity decreases, the sleeve and piston and the main friction pair have deteriorated, and abnormal wear is produced. Therefore, the diesel engine should be removed before the flameout, and gradually reduces the speed, and the air is run for a few minutes.
Stroke throttle
If the machine is severe, overloaded, the diesel engine will operate in the work of too large, the speed is too high, easy to cause rudeness, cylinder line, piston, and connecting rod, etc., to increase the mechanical load, easy to pull Cylinders, burn watts, etc.
Diesel engine is warm when it is too high, add cooling water
High-speed engineering diesel engine, if it is easy to rest, its huge inertia will cause the part of the crank link mechanism and the gas gasement to damage the parts and shorten the service life. To this end, some diesel engines use the simulation order to clearly define, the diesel engine idle operation time must not exceed 15 ~ 20min
Long-term idle speed
If the cooled water is added in the absence of a diesel air inadequate water, the cylinder head, the cylinder line, the cylinder, etc. will result in crack due to severe changes in cold and heat. In addition, the piston, connecting rod, and crankshaft are changed, causing severe impact, causing damage to the machine. At the same time, the mammatic throttle is that the fuel is not completely burned by excess into the cylinder, and the lubricating oil is diluted in the air cylinder wall.
Diesel engine is running in the oil
When the diesel finale is started, because the oil viscosity is large and the activity is poor, it is insufficient oil pump oil supply, and the machine friction is poorly losing, resulting in sharp wear, even pulling tiles, and flasks. At this time, when the water temperature is too low, the temperature of the cylinder is low, the diesel engine is extended, and once the fire, the pressure is rapidly increased, the diesel fuel is rude, and it is easy to cause mechanical damage to the parts.
Down is stopped after loading or unloading
At this time, it will cause insufficient oil supply from the oil supply due to insufficient oil supply, resulting in abnormal wear or burns. The diesel engine is operated in a state where the cooling water is low, the piston is large, and the tank phenomenon has occurred, and the vibration is generated, and the cylinder jacket is caught. Practice has confirmed that the diesel engine is often used when the cooling water temperature is 40 ° C to 50 ° C, and the parts wear is several times more than the normal operating temperature (85 ° C ~ 95 ° C).
Running in the absence of oil pressure
During the working process of diesel engine, the temperature of the cooling water is too low, the cylinder wall temperature is lowered, and the water evaporation produced by the combustion is agglomerated into water, contacting the exhaust gas, attached to the cylinder wall, producing erosion wear.
Diesel engine is cold after starting
After the diesel engine is turned off, the reincarnation of the cooling water, the heat dissipation capacity is low, the heat is loses cooling, which is easy to cause overheating of the cylinder head, cylinder block, cylinder block, etc., produce cracks, or causes the piston to over-expand the card to die in the cylinder. When the diesel engine is idling, the lubricating oil pressure is low, the water injection cooling effect is poor, resulting in a sharp increase in wear, easy to pull the cylinder; can also cause poor in mind, the burning is not complete, the carbon depth is severe, sometimes causing the valve and piston ring card , Cylinder rocker. Therefore, when the diesel engine is warm, the load should be removed first, slightly progressive speed, the diesel engine is turned off after the water temperature drop, and the water radiator is launched and the water vapor is excluded.
Working in a state in which the cooling water and the oil oil temperature is too low
Diesel machine cooling water will reduce its cooling effect, diesel engine is overheating due to effective cooling; cooling water, oil temperature is too high, and the diesel engine will also cause overheating. In addition, the piston, valve, and combustion chamber will increase significantly, causing joll mouth clogging and piston card death. If the oil pressure is found to be lower than the defined pressure, it is necessary to stop immediately, and then inherit the driving.