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11 Wrong Operating Methods for Diesel Generators
- Aug 22, 2017 -

    1. Machine over-speeding, overloading, such as heavy machine over-speeding, overloading, diesel engine will be in the load is too large, high speed operation under the circumstances, easy to cause rough work, cylinder, piston, connecting rod and other heat load and machinery The load increases, prone to pull cylinder, burning tile and other failures. Often overload operation, resulting in a long time inside the cylinder rough burning, easy to damage the cylinder pad.

  2. Long-term idling operation Diesel engine idle, the oil pressure is low, the piston top of the fuel injection cooling effect is poor, resulting in a sharp increase in wear and tear, easy to pull the cylinder; can also cause poor atomization, incomplete combustion, coke serious, and sometimes even lead to valve And the piston ring stuck, cylinder liner erosion. To this end, some diesel engine instructions clearly stipulates that the diesel engine idle time should not exceed 15 ~ 20min.

  3. With the load emergency stop or sudden unloading the load immediately after the shutdown of the diesel engine after the shutdown of the cooling water to stop the cycle, the cooling capacity of a sharp reduction in the loss of heat, easy to cause cylinder head, cylinder liner, cylinder block and other parts overheating Crack, or cause the piston to swell over the cylinder liner. On the other hand, the diesel engine downtime without idle cooling, will make the friction surface oil shortage, when the diesel engine will start again due to poor lubrication and wear. Therefore, the diesel engine should be unloaded before the shutdown load, and gradually reduce the speed, no-load operation for a few minutes.

  4. In the case of oil pressure is too low to run the oil pressure is too low, the lubrication system can not be normal oil circulation and pressure lubrication, the lubrication parts are not enough oil. Therefore, the machine in the process of running, we should pay attention to observe the oil pressure gauge or oil pressure indicator light situation. If you find oil pressure below the specified pressure, to immediately stop, troubleshooting and then continue to drive.

  5.Diesel engine temperature is too high when the sudden cooling of the water If the diesel engine overheating in the case of sudden cooling water, will cylinder head, cylinder, cylinder and other changes due to severe changes in hot and cold cracks. Therefore, the diesel engine temperature should be too high should be unloaded load, slightly increase the speed until the water temperature drops after the diesel engine flame, the water radiator cover loose, remove the water vapor. If necessary, slowly inject the cooling water into the water radiator.

  6. In the case of insufficient cooling water or cooling water, the oil temperature is too high to run the diesel cooling water will reduce its cooling effect, the diesel engine due to lack of effective cooling and overheating; cooling water, oil oil temperature is too high, also Will cause the diesel engine to overheat. At this point the cylinder head, cylinder liner, piston components and valves and other major heat load, its mechanical properties such as strength, toughness and other sharp decline, so that parts deformation increases, reducing the gap between the parts to accelerate the wear and tear, serious But also produce cracks, mechanical parts of the fault. Cooling water, oil temperature is too high will speed up the deterioration of oil aging and burning, and the oil viscosity decreased, casing and piston and the main friction of the conditions of lubrication conditions deteriorated, resulting in abnormal wear and tear. Diesel engine overheating will also worsen the diesel engine combustion process, so that the injector work disorders, poor atomization, coke increased.

  7. After the cold start is not warm up with load operation Diesel engine cold start, due to oil viscosity, poor mobility, oil pump is insufficient oil, the friction surface of the machine due to lack of oil lubrication is bad, causing sharp wear, or even pull the cylinder , Burning tile and other failures. Therefore, after the start of the diesel engine cooling should be idle operation temperature, when the oil temperature reaches 40 ℃ or more when the load operation; machine starting should be linked to low speed, and in a row in each gear for a mileage until the oil temperature is normal, After, can be transferred to normal driving. The same time as

  8. Diesel engine running in the absence of oil at this time due to insufficient supply of oil caused by the friction surface of the lack of fuel, resulting in abnormal wear or burn. To this end, before the start of the machine and the operation of the diesel engine to ensure adequate oil to prevent the lack of oil caused by pull cylinder, burner failure. The same time as

  9.Diesel engine after the cold start throttle throttle throttle throttle, the diesel engine speed increased sharply, will cause some of the friction on the plane due to dry friction and severe wear. In addition, the throttle when the piston, connecting rod and crankshaft force changes, causing severe impact, easy to damage the parts. The same time as

  10. In the cooling water and oil oil temperature is too low in the operation of the diesel engine work process, the cooling water temperature is too low, the cylinder wall temperature decreases, the combustion of water vapor condensed into water droplets, contact with the exhaust gas generated acidic substances, Attached to the cylinder wall, resulting in corrosion wear. Practice has proved that the diesel engine often in the cooling water temperature 40 ℃ ~ 50 ℃ when used, the parts wear than the normal operating temperature (85 ℃ ~ 95 ℃) under the operation is several times. At this point, the water temperature is too low when the cylinder temperature is low, diesel engine ignition delay period, once the fire, the pressure increased rapidly, diesel fuel rough, easy to cause mechanical damage parts. Diesel engine in the long-term cooling water in the lower temperature of the state of operation, the gap between the piston and the cylinder, has occurred knocking cylinder phenomenon, and produce vibration, so that the cylinder liner. Oil temperature is too low, the oil viscosity of poor mobility, lubricating parts of the lack of oil, so that lubrication worse, resulting in increased friction wear, shorten the life of diesel engines. The same time as

  11. Extinguish the thump before the throttle high-speed operation of the diesel engine if the sudden stop operation, its huge inertia will crank connecting rod mechanism and parts of the valve body damage, shorten the service life. At the same time, Meng throttle is fuel because of excessive into the cylinder too late to burn and along the cylinder wall down, dilute the oil. In addition, the piston, the valve and the combustion chamber will increase significantly, causing the nozzle clogging and piston stuck.