如何预防柴油发电机组汽缸开裂

 冬季气温低，柴油发电机组汽缸盖易发生裂缝漏水。其主要原因有以下几个方面：　
1、起动后才加冷却水。柴油发电机组起动后，机内温度立即升高，如果这时加入冷却水，汽缸体与汽缸盖急剧冷却，就会因冷缩而裂缝。　
2、停机后，没有放冷却水。机内水冻结成冰，体积增大，发生汽缸体和汽缸盖胀裂。　　
3、柴油发电机组运转时，冷却水不足或水箱开锅机温过高，突然加入冷却水。汽缸体和汽缸盖过冷收缩也会引起开裂。
4、柴油发电机组长时间运转，机内温度高，停车后立即放掉高温水。会导致高温零件骤遇冷空气而开裂。
5、使用减压机停机，使高温的气缸盖突然遇到寒冷空气而导致开裂。　
防止各类汽缸体和汽缸盖开裂有以下方法：　
1、起动柴油发电机组前，应先给水箱加入温热水，严冬季节要灌注热水2~3次，待放水阀中流出的水约30~50℃时起动为佳。　
2、发动机运转时间较长时，停机后应等待半个小时左右，机温下降到40~50℃时再放冷却水。放完水后用细铁丝捅通放水阀开关，防止沉淀物堵塞放水阀。　　
3、柴油发电机组运转过热严重缺水时，应让柴油机低速空转10~15分钟，然后再慢慢加入冷却水。

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