We all know that fire pumps have cooling systems, which are divided into manual and automatic. The working principle is to control the heat dissipation capacity of the heat exchanger by controlling the ball valve. The engine cooling system of the diesel engine fire pump adopts double closed-loop heat exchangers. The cooling water is controlled by a ball valve from the pump outlet pipe to the heat exchanger, so that the cooling water temperature of the machine body is between 85 and 95 °C. If the water temperature is too high, you can increase the opening of the ball valve to increase the heat dissipation capacity of the heat exchanger, otherwise, close the opening of the ball valve. To automatically control the fire pump group, add a solenoid valve in parallel with the ball valve in the heat pipe. The solenoid valve has an automatic temperature switch. After 20 seconds, the water temperature of the diesel engine still exceeds 95°C. The automatic control system will send out an audible and visual alarm, and the staff will go to the scene to check the cause.

 

 

After understanding the working principle of the cooling system of the fire pump, we only need to know the main reasons why the temperature of the diesel engine fire pump is too high. In the process of maintenance in the future, when we encounter such situations, we can easily troubleshoot the problem. Simple problems can be repaired by yourself. There are several possible causes of fire pump overheating:

 

 

1, Diesel engine fire pumps can easily lead to overload operation if they run for a long time. Therefore, in the operation of the fire pump, we need to pay attention to avoid the high-speed and overload operation of the diesel engine for a long time.

 

 

2, The oil radiator of the diesel engine fire pump is blocked by foreign matter, resulting in poor heat dissipation. When the blockage is found, we only need to clean the blockage, and the problem can be solved.

 

 

3, The cylinder of the diesel engine fire pump leaks, high-temperature gas enters the oil pan, and heats the oil in the oil pan.

 

 

4, The cooling fan speed of the air cooler of the diesel engine fire pump is too low, which reduces the cooling intensity and increases the body temperature of the diesel engine.

 

 

5, The position of the oil temperature adjustment switch of the diesel engine fire pump is incorrect.

 

 

Check whether the above components have any problems, and you can basically find out the cause of the overheating of the fire pump. In daily maintenance, ZJBetter reminds everyone that it must be operated and overhauled regularly, so as not to be difficult to operate in case of emergency!