In order to prevent summer cooling fluid temperature is too high, diesel generating set in use process, should pay attention to the following several aspects:
(1) the proper use of closed cooling system
Modern car engines are closed cooling system, the radiator cover is sealed, and added a expansion tank. Steam engine work, coolant into the expansion water tank, after cooling flow back to the radiator, a large amount of evaporation loss, can prevent the coolant and the boiling point of coolant temperature can be improved. The cooling system should be used with anti-corrosion, boiling, antifreeze and the scale of high quality cooling fluid, and must ensure that the seal in use, to receive the effect.
(2) keep the cooling system of the external and internal clean
This is one of the important condition to increase the cooling efficiency. External radiator is stained with dirt, grease or heat sink due to collision deformation, all can affect the wind through, radiator cooling, cooling fluid temperature is too high. Therefore the radiator appear this kind of circumstance should be timely cleaning or repair. In addition, the cooling system of inner product with scale, mud, or oil, will affect the heat transfer of cooling fluid. Filling of inferior, coolant or water cooling system will cause fouling, and scale of the heat transfer ability is only a small percentage of the metal, and poor cooling effect. So in the cooling system should include quality of coolant.
(3) keep the cooling fluid amount when the engine is cold, the coolant fluid level should be located in an expansion tank (figure 1) between the highest and lowest marks mouth if the liquid level is lower than the minimum mark, expansion tank should be added in time. Note that the cooling liquid can't fill inside the expansion water tank, should leave room for expansion.
(4) to maintain moderate diesel generating sets fan belt tension
Fan belt is too loose, make the pump speed is too low, influence the cooling fluid circulation, and accelerate the wear of belt. But the belt too loose or too tight, will make the water pump bearing wear. In addition, the belt cannot be stained with oil. Therefore, we should check regularly adjust the fan belt tension. Check when the thumb press the central belt, as shown in figure 2, about 98 n force. If the belt deflection of about 10 to 15 mm, suggests that appropriate fan belt tension. Otherwise, should be given to adjust. Adjustment, can move generator positioning bolt position, to change the belt tension. If change the new fan belt, detection of tension, the belt deflection about 8-10 mm.
(5) to avoid the engine work in the heavy load time is too long engine load is large, will cause the coolant temperature is too high. For example, some small diesel generator power to DORA run and step on the gas, some of the diesel engine in the summer air conditioning long time running, etc, are likely to cause the engine "boiled" phenomenon. Therefore, in order to prevent the engine temperature is too high, should be timely in low gear, to build when reduce the engine load.
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