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1.故障现象1台试制的装载机工作不足2000h,其发动机冷却液就出现“开锅”现象。拆解水散热器后发现,靠近上水室一侧的内翅片表面覆盖了一层黄色片状沉积物,内翅片的孔洞几乎全部被沉积物堵死,如图1a所示。拆解发动机后发现,铝制水泵严重锈蚀,如图1b所示,缸套外表面已经生锈,且有严重穴蚀。2.原因分析该发动机使用的冷却液为乙二醇冷却液,属于低硅酸盐配方无机冷却液,浓缩液中硅的含量不超过250mg/m~3。冷却液生产厂家提供的是浓缩液,加注时,按照装载机工作环境的最低温度添加蒸馏水或去离子水进行稀释。为了查明冷却
1. Symptom 1 trial loader less than 2000h, the engine coolant appeared “boil ” phenomenon. After disassembling the water radiator, it was found that the surface of the inner fins close to the side of the upper water chamber was covered with a layer of yellow sheet-like sediment. The fins of the inner fins were almost completely blocked by the sediment, as shown in FIG. 1a. Disassemble the engine and found that the aluminum pump serious corrosion, as shown in Figure 1b, the outer surface of the liner has been rusty, and there is a serious cavitation. 2. Analysis of the reasons The engine coolant is glycol coolant, which belongs to the low-silicate inorganic coolant, the concentration of silicon in the concentrate does not exceed 250mg / m ~ 3. The coolant manufacturer provides the concentrate. When filling, dilute with distilled or deionized water according to the minimum temperature of the working environment of the loader. In order to find out the cooling