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一、冷却系它的任务是保证发动机在最佳温度条件下工作。发动机的最佳工作温度是在设计时根据热力平衡确定的,现代水冷柴油机的最佳工作温度一般在75～95℃之间。当其它条件一定时,发动机在此温度范围内工作,其动力性和经济性最好,零件磨损也最小。 1.发动机过热冷却系技术状态失常,常常引起发动机过热,使机器加速磨损或损坏。原因有多种,其中最重要的一条是冷却系产生水垢。①水垢是导热不良物质,它的导热能力是铸铁的1/25,铜的1/50。当冷却系内有水垢生成时,影响了热量的正常传导,
First, the cooling system Its mission is to ensure that the engine at the best temperature conditions. The optimum working temperature of the engine is determined according to the thermal balance during the design. The optimum working temperature of the modern water-cooled diesel engine is generally between 75 and 95 ° C. When the other conditions are constant, the engine works in this temperature range, its power and economy are the best, and parts wear is also minimal. 1. Engine overheating Technical condition of the cooling system is abnormal, often causing the engine to overheat, causing the machine to wear out or become damaged. There are a variety of reasons, the most important of which is the scale of the cooling system. ① scale is poor thermal conductivity material, its thermal conductivity is cast iron 1/25, 1/50 of copper. When there is scale in the cooling system, the normal conduction of heat is affected,