If the oil supply of each cylinder of the diesel generator is uneven, such as some cylinder oil supply is excessive, and some cylinder oil supply is too small, it will directly affect the stability of the work of the diesel generator. The fuel injector of multi-cylinder diesel generator should ensure that the fuel supply sequence of each cylinder conforms to the required ignition sequence of diesel generator; The oil supply of each cylinder is uniform, and the unevenness is not more than 3~4% under the calibration condition. The oil supply advance Angle of each cylinder is the same, and the difference is not more than 0.5 crankshaft Angle. In order to prevent the dripping phenomenon of fuel injection pump, the fuel injection pump must also ensure that the oil supply stops quickly.
Because of the wear and tear of the plunger couple and the oil outlet valve couple, the diesel oil leakage will make the oil supply of each cylinder reduced or uneven, resulting in the diesel generator can not start, lack of power, increased fuel consumption, unstable operation. Therefore, it is necessary to check and adjust the oil supply of each cylinder of the injection pump on schedule to ensure the development of diesel generator power.
If the diesel generator in the medium load operation everything is normal, but can not afford the full load, that is, the maximum power is not strong. Most of the accidents are caused by insufficient oil supply of the fuel injection pump. It is necessary to remove the fuel injection pump and adjust the maximum oil supply and oil imbalance on the fuel injection nozzle test bench, or rotate the maximum oil supply limit screw on the high-pressure oil pump a little to increase the oil supply.
Adjustment of fuel supply at rated speed (1) Increase the speed of fuel injection pump to the rated speed, so that the throttle manipulator is in the maximum fuel supply position. (2) Set the preset oil supply times on the speedometer to 200 times, and align the mouth of the oil measuring cylinder with the lower mouth of the oil collecting cup. (3) Press the counting button on the tachometer to start oil supply and counting. After the oil supply stops, read the amount of oil in each oil gauge. (4) The oil supply unevenness of each cylinder should be less than 3%, and the non-compliance should be adjusted regularly. The main action is to loosen the ring (or fork) fastening screw and turn the plunger control sleeve at an Angle relative to the ring to change the mutual position between the plunger and the plunger sleeve, thereby adjusting the oil supply. For the use of pull rod fork type, it is to change the distance between fork and pull rod to adjust.
Generator fuel injection pump in oil supply step, because of the diesel oil compressibility, high pressure tubing elasticity, high pressure diesel will be formed in the pipe pressure fluctuation, the pressure wave in the tube it takes time to transfer, to ensure that each cylinder injection interval Angle is consistent, uniform oil, diesel generator operating smoothly, high pressure tubing length and diameter is calculated and selected.
Post time: Oct-24-2022