Diesel generator set outlet water temperature is too high fault characteristics and causes:
1. There is air in the water pipe: After the diesel generator is started, there is no water coming out of the outlet pipe or there is very little water, and the water temperature continues to rise
p>Loosen the thermometer joint on the water outlet pipe, let out the air until the water outlet is smooth, and tighten the joints in the water pipe.
2. Insufficient circulating water volume: under high load, the outlet water temperature is too high and the engine oil temperature also rises
(1), the fresh water pump or fan speed cannot reach the speed
(2). The fresh water pump impeller is damaged.
(3). The gap between the fresh water pump impeller and the shell is too large.
(4). In the open cycle, the water source The water level is too low and the fresh water pump cannot suck water
(5). In the closed cycle, the radiator water is insufficient
(6) The water pipeline is blocked
Treatment method:
1. Increase the water level and add cooling water
Clean the pipelines and remove the scale in the cooling water channels
2. Closed cycle , there is too much scale on the surface of the radiator, which affects heat dissipation
Remove the scale and clean the surface
3. The thermostat fails
Replace it
< p>4. The water temperature gauge is incorrectRepair or replace
5. There are cracks on the shoulder blade of the cylinder liner: at this time, the cooling water in the radiator is bubbling
< p>Replace the cylinder linerThe inlet air temperature is the ambient temperature; the outlet air temperature should not exceed 40°C.
According to international technical requirements, the operating ambient temperature of the generator is defined as 40°C. All designs and powers are based on this ambient temperature. For generators, the ambient temperature is the inlet air temperature of the generator. Since the generator works together with the diesel engine, the heat generated by the diesel engine will cause the temperature in the entire space to exceed 40°C.
The ambient temperature of the generator during actual operation should not exceed 40°C. If the actual ambient temperature exceeds 40°C, the generator should run at reduced power. For the ambient temperature, if it is lower than 40°C, the power of the generator can be greater than the rated power.
Extended information:
Generator usage requirements:
1. Check that the transmission parts of the internal combustion engine and the generator should be connected reliably, the wires of the output line should be well insulated, and all instruments should be complete and effective.
2. After starting, it should be run at low speed for 3-5 minutes. The operation can only be started after the temperature and oil pressure wheel are normal. There should be no abnormal noise when the generator is increasing in speed, the slip ring and the brushes on the commutator should be in good contact, and there should be no jumping or sparking.
3. Before stopping, you should first cut off the main switches of each power supply branch, gradually reduce the load, cut off the main power supply switch of the generator, and return the excitation rheostat to the maximum resistance position to reduce the voltage to the lowest value. Cut off the excitation switch and neutral point grounding switch to stop the operation of the internal combustion engine.
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