论文部分内容阅读
发动机工作过程中,燃烧气体的温度可高达2000℃左占,它将引起与高温气体直接接触的缸盖、气门、活塞等的温度急剧升高。为了保证发功机正常工作,就必须进行冷却,常用水冷却法。汽油机和柴油机其结构特点不同,各自的受热状况也有差异。工作中产生的温度后者远高于前音。因此,对于柴油机,冷却系统的使用维护要求比汽油机更为严格。一、保证冷却水的水质自然界的水分为硬水和软水。通常把含钙、镁盐类的水称做硬水;把不含或微含钙、镁盐类的水称做软水。硬水用来做冷却水,会很快在冷却水道中形成导热性很差的水垢,严重影响冷却效果。所以,冷却
During engine operation, the temperature of the combustion gas may be as high as 2000 ° C, causing a rapid increase in the temperature of the cylinder head, valve, piston and the like that are in direct contact with the hot gas. In order to ensure the normal work generator, it must be cooled, commonly used water cooling method. Gasoline and diesel engines of different structural characteristics, their respective thermal conditions are also different. The temperature at work is much higher than the front tone. Therefore, for diesel engines, cooling system maintenance requirements are more stringent than gasoline engines. First, to ensure the quality of cooling water Water in nature is hard and soft water. Usually calcium, magnesium salts of water called hard water; to free or micro calcium, magnesium salts of water called soft water. Hard water used to make cooling water, will soon form in the cooling water channel poor thermal conductivity scale, seriously affecting the cooling effect. So, cool down