What are the reasons for "maintenance" diesel generators not catching fire?
：发动机油路不顺畅、气缸压缩异常、润滑油太粘稠、油泵内有没有空气、燃油用尽、供油管路堵塞或漏气、油品质量达不到要求、停车阀(或燃油电磁阀）未工作、执行器未工作或调速拉杆开度过低、调速板无输出信号至执行器、转速传感器无反馈信号、进气管堵塞、排气管堵塞；其他故障。 The causes of the diesel generator not catching fire include : the engine oil circuit is not smooth, the cylinder compression is abnormal, the lubricating oil is too viscous, there is no air in the oil pump, the fuel is exhausted, the fuel supply pipeline is blocked or leaking, Not meeting requirements, stop valve (or fuel solenoid) is not working, actuator is not working, or speed control lever opening is too low, no output signal from speed governor to actuator, no feedback signal from speed sensor, blocked intake pipe, exhaust Tube blocked; other failure. The details are as follows:
Analysis of the causes of diesel generators not catching fire
1. The engine oil circuit is not smooth. Check whether the oil circuit of the engine is clear. If you hear a squeaking sound from the fuel injection nozzle, it proves that there is no problem with the oil circuit.
2. Cylinder compression. Check the compression of the cylinder. If you release the decompression device and you can still rotate the flywheel, there is a problem with the compression of the cylinder. You need to replace the cylinder piston and piston ring.
3. Lubricant. The lubricating oil should be replaced in time. Too viscous lubricating oil is not conducive to the smooth start of the engine.
4. Oil pump. See if there is air in the oil pump. If there is air in the oil pump, the diesel engine will not catch fire.
5. Fuel exhaustion: refill the fuel tank with a sufficient amount of clean fuel.
6. The fuel supply pipeline is blocked or leaking: Fill the fuel filter with fuel, remove the air in the fuel supply pipeline, and ensure that all cut-off valves in the fuel supply pipeline are in the open position;
7. The stop valve (or fuel solenoid valve) is not working: check the power supply wire of the stop valve (or fuel solenoid valve) to ensure its connection is firm and reliable. Check the working status of the stop valve (or fuel solenoid valve) to ensure normal operation. After power supply, the parking valve (or fuel solenoid valve) can work normally;
8. The actuator is not working: check the power supply line of the actuator to ensure that it is firmly and reliably connected, check the implementation work status, and confirm that it can work normally after obtaining normal working power;
9. The opening speed of the speed control rod is too low: Check the speed control rod to ensure that the open position is not less than the effective position of the actuator.
10. No output signal from the speed governor to the actuator: During the startup process, measure whether the power supply of the speed governor is normal, and measure the voltage signal output from the speed governor to the actuator.
11. There is no feedback signal from the speed sensor: measure whether the feedback signal from the speed sensor is normal, check whether the line connection between the speed sensor and the governor is firm and reliable; remove the speed sensor to check whether the sensor head is damaged; measure the resistance of the sensor; check the speed Whether the installation of the sensor meets the requirements.
12, blocked intake pipe, exhaust pipe: check the engine's intake pipe to ensure that the engine intake air flow; check the engine's exhaust pipe to ensure that the engine exhaust flow.
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