The 11 error of diesel generator starting method

Author：gdlhwt Time：2014-08-24  

(1) after a cold start is not warm machine with starting load operation of diesel engine oil cooler, due to high viscosity, poor mobility, is the oil pump oil supply shortage, the machine friction surface due to lack of oil lubrication, causing a sharp wear, scuffing, even has the tile burning fault. Therefore, diesel engine cooling after the start should be idle until the oil heating, the temperature reached 40 degrees above to take load operation; the machine should start low gears, and circulated in every gear driving a mileage, until the temperature is normal, supply sufficient, we can turn to the normal running.

(2) diesel engine running at this time due to oil supply shortage caused by the friction pair surface oil supply shortage in oil is insufficient, resulting in abnormal wear or burn. Therefore, the process of the operation of the machine before starting the diesel engine and to ensure adequate to prevent oil, due to the lack of oil cylinder, caused by the fault of burning tile.

(3) with a load of emergency shutdown or suddenly removable load immediately after the shutdown of the diesel engine flameout cooling water circulation stops, cooling capacity decreases sharply, the loss of cooling heating parts, easy to cause the cylinder cover, cylinder liner, cylinder and other parts overheating, crack, or the piston is excessive expansion card dead in the cylinder sleeve. On the other hand, the diesel engine idling stop without cooling, will make the friction surface oil shortage, when the diesel engine will start again and increased wear due to poor lubrication. Therefore, removable load diesel engine flameout, and gradually reduce the speed, no-load running a few minutes.

(4) diesel engine cold starting later bombarded the throttle when bombarded the throttle, the engine speed is increased rapidly, can cause some friction surface on the machine generated due to dry friction and severe wear. In addition, when the throttle piston, connecting rod and crankshaft accept force changes, cause severe impact, easy damaged parts.

(5) the operation of diesel engine cooling water shortage in the cooling water shortage or cooling water, oil temperature is too high will lower its cooling effect, diesel engine due to lack of effective cooling and overheating; high oil temperature of cooling water, oil, also can cause the diesel engine overheating. The cylinder cover, cylinder liner, piston assembly and a valve main heating load, its mechanical properties such as strength, toughness sharply, make the part deformation increases, decreases with the gap between the components, to accelerate the mechanical wear and tear, there will be a serious fault crack, parts stuck. Cooling water, oil temperature is too high will accelerate the deterioration of aging and burning oil, and oil viscosity decrease, deterioration sets of conditions of cylinder and piston and main friction pair lubricated condition, resulting in abnormal wear. Diesel engine overheating will also worsen the diesel combustion process, the fuel injector disorders, poor atomization, increased carbon.

(6) operates in the cooling water and the oil of the oil temperature too low state of diesel engine working process, the cooling water temperature is too low, the cylinder wall temperature decreased, generated by the combustion of water vapor condenses into water droplets, and the exhaust gas to form acidic substances, attached to the cylinder wall, cause corrosion wear. The practice proved that, the diesel engine is often used in cooling water temperature is 40 DEG ~50 DEG, the parts wear than normal operating temperature (85 DEG to 95 DEG C) operation is several times. At this time, when the water temperature is too low in the cylinder of diesel engine low temperature, the ignition delay period is extended, a fire, a rapid pressure rise, diesel fuel and crude, easy to cause the components of the mechanical damage. Long term operation of diesel engine cooling water in the low temperature condition, clearance between the piston and cylinder liner of large, knocking phenomenon has occurred, and produce vibration, make the cylinder liner cavitation occurs. The oil temperature is too low, the oil viscosity of poor liquidity, lubrication oil is insufficient, make the lubricating variation, resulting in the wear increased, shorten the service life of the diesel engine.

(7) in the case of low oil pressure in running the engine oil pressure is too low, it can not be normal oil circulation lubrication system and pressure lubrication, the lubrication parts do not have enough oil. Therefore, the machine in the process of running, to observe the oil pressure or oil pressure indicator lamp status. If it is found that the oil pressure is lower than the prescribed pressure, should immediately stop, troubleshooting and then continue driving.

(8) machine into overdrive, overload running the machine such as serious speeding, overloading driving, diesel engine will run in the work load is too large, the speed is too high, easy to cause the work cylinder, piston, connecting rod rough, under thermal load and mechanical load increased, prone to scuffing, tile burning fault. Often overload caused by burning, rough cylinder long time, easily damaged cylinder gasket.

(9) the flameout ago pounded the diesel engine throttle high-speed operation if suddenly stop functioning, its enormous inertia will make the crank connecting rod mechanism and the gas distribution mechanism parts damage, shorten the service life. At the same time, bombarded the throttle is fuel due to excessive enters the cylinder not complete combustion and flow along the cylinder wall, the dilution of lubricating oil. In addition, still can make the piston, valve and combustion chamber deposits increased, caused by nozzle clogging and

Piston stuck.

(10) of diesel engine high temperature when suddenly cooling water if the water shortage in diesel engine overheating situation suddenly cooling water, cylinder head, cylinder liner, cylinder can make such drastic changes caused by cold and hot crack. Therefore, engine temperature is too high to be first removed load, slightly increase the speed until the temperature decreased, the diesel engine flameout, the water in the radiator cap unscrewing, the exclusion of water vapor. When necessary to slow cooling water into the water radiator.

(11) the long-term idle idle engine, lubricating oil pressure is low, the effect of injection cooling piston top difference, cause wear increased sharply, easy cylinder scoring; can also cause poor atomization, combustion