Diesel Generator Set Low Pressure Oil Supply is Not Smooth

The diesel generator set is a mechanical equipment that converts other forms of energy into electrical energy. It is driven by water turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and then transfers it to the diesel generator set, which is converted into electrical energy by the generator. Diesel generator sets are widely used in industrial and agricultural production, national defense, science and technology and daily life.

1. The oil supply of the low-pressure oil circuit is not smooth. The oil inlet and return pipelines of the diesel generator set from the oil tank to the oil inlet chamber of the injection pump are all low-pressure oil circuits. When the pipeline joints, gaskets and oil pipes leak due to damage, air will enter the oil circuit and cause air resistance, resulting in poor oil supply. The diesel generator set has trouble starting, slow acceleration and other failures, and will automatically shut down in serious cases. When the oil pipe is plugged into the oil filter screen and diesel filter element due to aging, deformation and impurities, or the oil pipe is plugged into the oil filter screen and diesel filter element due to dirt, the fuel supply will be insufficient, which will reduce the engine power and make it difficult to start. The diesel generator set can be checked and eliminated on the vehicle. Use the hand oil pump to pump oil to a certain pressure, and loosen the air release screw. If there are bubbles overflowing and the air is not exhausted all the time, it means that the oil circuit is filled with air; If there is no air bubble but the diesel oil overflows from the vent screw weakly, the oil circuit is blocked. The normal phenomenon is to slightly loosen the bleed screw, and an oil column will be ejected at a certain pressure immediately. The troubleshooting method is to find out damaged or aged gaskets, joints or oil pipes and replace them; The way to prevent such failures is to frequently clean the oil inlet filter screen and diesel filter element, frequently check the pipeline, and timely solve the problems found.

2. The piston spring of the fuel transfer pump is broken. The diesel generator set stops suddenly during operation and cannot be started. Unscrew the bleed screw and check that there is no or little fuel in the low-pressure oil chamber of the fuel injection pump. Pump the oil with the hand pump until the entire low-pressure oil chamber is filled with oil. Drain the air and restart the engine. The engine returns to normal, but it will automatically shut down again after driving a certain distance. This fault is likely to be caused by the broken piston spring of the fuel transfer pump. This fault can be eliminated on the vehicle by unscrewing the screw and replacing the spring.

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