Farmers who have used diesel generators generally know that the nozzle is one of the three pairs of precision components in the diesel fuel supply system. Its normal service life is over 1,000 hours. But due to improper use, often use hundreds of hours, even dozens of hours on the wear and tear card.One, the main reasons for nozzle stuck:1, diesel oil is not clean, there are impurities in the high-pressure oil pipe, so that the needle valve coupling is not strictly closed, the high-pressure gas in the combustion chamber is channeling back, and the needle valve coupling is burned out. In addition, the injector pressure regulating spring, tappet and other parts of the dirty things through the injector tappet moved to the upper part of the injector needle valve, or on the oil road to prevent oil leakage of cotton rope, lead wire through the high pressure tubing into the injector, will make the needle valve parts stuck.2. The temperature of the machine is too high, the cooling of the crankjet is not good, and the valve parts of the manufactured tiger are stuck. But the oil supply time is too late, the cooling channel scale is too much or blocked, the pump impeller end face wear, the engine long-term overload and so on will make the engine overheat.3, the exhaust valve wear, so that the fuel injector stops the phenomenon of dripping oil, resulting in the nozzle burning coke carbon accumulation, stuck fault.4. When the injector is installed, the gasket or gasket is damaged, resulting in air leakage, causing the local temperature of the injector to be too high and stuck.5, jet bending pressure is too low, resulting in high pressure gas backchanneling in the combustion chamber;6, parts manufacturing reasons, such as cylinder head injector installation hole and injector match too tight, needle valve body and cylinder head on the installation hole gap is too small, cylinder head injector installation hole processing is too deep.Two, the nozzle stuck repair method: the first stuck nozzle into diesel or oil heating, and then remove with cloth wrapped, and then hand pliers clamp needle valve and slowly activity, the needle valve from the needle valve body out. Drop a small amount of clean oil in the needle body, so that the needle valve in the needle body repeated activities, until the needle valve can move freely in the needle body. If there are burn marks on the sealing surface of the needle valve, it should be ground with grinding paste. When grinding, pay attention to the amount of grinding paste and grinding time. Clean the bell valve parts on the injector, and adjust the injection pressure can be reused.Fuel consumptionIn the use of diesel generator set, some customers reflect the phenomenon of fuel consumption too fast, but do not know the specific parts from which to proceed with processing, the following feng De for you to analyze several situations:First, when it is found that oil consumption is too much, we should first check whether there is oil leakage at the connection of the body and the gear chamber cover, the big plate, the back cover and the cover on the side of the row wheel. In case of oil leakage, observe whether the sealing gasket at each connection part is complete, and replace the damaged sealing gasket. If the sealing pad is complete, check whether the connecting screws of each part are loose. Use a spanner to apply the specified torque to the loose bolt. If part of the above basic normal, and the oil spill in the rack position, oil casing inspection, inspection area mainly in side of the oil with road wheel shell side of the front end, because of mounting screw loosening, oil road wheel under the triangle drive and protection shell frame Angle cause long-term brush touch, grinding oil casing through forming gap and oil generation.Two, the engine long-term use of normal wear, or abnormal wear due to improper maintenance, will make the diesel engine cylinder liner formed longitudinal pull mark, cylinder diameter, piston side clearance beyond the specified value, so that the piston ring support force is reduced, the phenomenon of scraping oil is not clean. Or because the inner support twisting spring in the oil ring is disconnected in the opening position of the oil ring, resulting in unclean oil scratching and combustion, causing serious oil consumption symptoms, manifested as the diesel engine starting difficulty, exhaust pipe has obvious blue smoke, serious oil injection breathing apparatus. Moreover, the piston should be on the upward side, in the assembly due to the direction of the inversion of the combustion chamber to form an inverted state, although it will not affect the starting of the diesel engine, but the loss of oil will be quite serious, fuel consumption in 0.5 kg or so a day.Three, valve duct wear will burn diesel generator oil is rare, but according to the introduction of relevant information, is also a reason not to be taken lightly.
