In summer or after long-term continuous use, a high temperature warning will appear on the diesel generator set. At this time, the machine should be stopped to check the cause and eliminate safety hazards. If it is running under high temperature, it may cause cylinder pulling or explosion, power reduction, reduced lubricating oil viscosity, increased friction between parts and other damage to the machine.
What are the common reasons for high temperature alarms in diesel generator sets?
1. Long-term overload operation: Long-term overload operation of diesel generator sets will increase its fuel consumption and heat load, resulting in excessive water temperature.
2. Insufficient coolant: Regularly check the coolant inventory in the radiator and expansion tank of the diesel generator set. If there is a lack of coolant, it will affect the heat dissipation effect of the diesel engine and cause high temperature of the diesel engine.
3. Interference between cooling devices: If the hydraulic oil radiator and the water radiator are placed one after the other, when the hydraulic oil temperature is high, it will inevitably cause the cold air temperature on the air inlet side of the water radiator to be high, affecting the heat dissipation of the water radiator. In this regard, the heat dissipation of the hydraulic system should be inspected to reduce the impact of the hydraulic oil radiator on the poor heat dissipation of the diesel engine water radiator.
4. The fan belt is too loose or the fan is deformed: Regularly check whether the diesel engine fan belt is loose and whether the fan shape is abnormal. Because the fan belt is too loose, it is easy to cause the fan speed to decrease, causing the radiator to fail to exert its due heat dissipation capacity, resulting in excessive temperature of the diesel engine. In addition, fan deformation will also cause the radiator's heat dissipation capacity to be unable to be fully utilized.
5. Debris attached to the radiator surface: Debris attached to the radiator surface is the most common phenomenon. The attached debris will reduce the heat dissipation area of the radiator and the windward area of the radiator, resulting in a decrease in the heat dissipation capacity of the radiator, causing high temperature of the diesel engine. Therefore, the radiator should be cleaned regularly.
6. Poor coolant circulation: Insufficient thermostat opening will reduce the heat dissipation capacity of the diesel engine cooling system. If the diesel engine is hot, the thermostat can be placed in water for heating inspection. Generally, the opening distance of the thermostat is 8 to 10 mm.
