风行游艇的发动机是如何冷却的
[{"content":"发动机除了要有润滑系统减少零件间的摩擦外,还必须要有个冷却系统,适时将受热零件的部分热量及时散发出去,以保证发动机在最适宜的温度状态下工作。发动机冷却有水冷和风冷两种方式,现在一般车用发动机都采用水冷式。发动机水冷式冷却系统主要由水泵、散热器、冷却风扇、补偿水箱、节温器、发动机机体、气缸盖水套等部分组成。","id":"7227711d1af33979","order":1,"type":1},{"content":"https://img3.baa.bitautotech.com/img/V2img3.baa.bitautotech.com/dzusergroupFiles/2022/11/28/42ed50726ae54b388a15b81b922683d7_800_0_max_png.png","height":426,"id":"0085cea6484160c2","note":"","order":2,"type":2,"width":634},{"content":"发动机工作时,气缸内的气体温度可高达1727~2527C,若不及时冷却,将造成发动机零部件温度过高,尤其是直接与高温气体接触的零件,会因受热膨胀影响正常的配合间隙,导致运动件受阻甚至卡死。此外,高温还会造成发动机零部件的机械强度下降,使润滑油失去作用等。\n那是怎么进行冷却的呢?主要通过水泵使环绕在气缸水套中的冷却液加快流动,通过行驶中的自然风和电动风扇,使冷却液在散热器中进行冷却,冷却后的冷却液再次引入到水套中,周而复始,实现对发动机的冷却。","id":"5667fa52878a0ad3","order":3,"type":1},{"content":"https://img3.baa.bitautotech.com/img/V2img3.baa.bitautotech.com/dzusergroupFiles/2022/11/28/4221bb0e69ea403495fadf936917b46b_800_0_max_png.png","height":427,"id":"df7bbaae2f4c57e8","note":"","order":4,"type":2,"width":633},{"content":"其实冷却系除了对发动机有冷却作用外,还有“保温”的作用,因为“过冷”或“过热”,都会影响发动机的正常工作。这个过程主要是通过节温器实现发动机冷却系“大小循环”的切换。什么是冷却系统的大小循环?可以简单理解为,小循环的冷却液是不通过散热器的,而大循环的冷却液是通过散热器的。","id":"7d27280f8a36fbfa","order":5,"type":1},{"content":"https://img3.baa.bitautotech.com/img/V2img3.baa.bitautotech.com/dzusergroupFiles/2022/11/28/fc4bed8fc2c24c9ca0f6976813747cc7_800_0_max_png.png","height":427,"id":"3b7fee9cac1fc150","note":"","order":6,"type":2,"width":633},{"content":"冷却液又称防冻液,是由防冻添加剂及防止金属产生锈蚀的添加剂和水组成的液体。它需要具有防冻性,防蚀性,热传导性和不变质的性能。现在经常使用乙二醇为主要成分,加有防腐蚀添加及水的防冻液。冷却液用水最好是软水,可防止发动机水套产生水垢,造成传热受阻,发动机过热。在水中加入防冻剂同时提高了冷却液的沸点,可起到防止冷却液过早沸腾的附加作用。另外,冷却液中还含有泡沫抑制剂,可以抑制空气在水泵叶轮搅动下产生泡沫,妨碍水套壁散热。","id":"31ca604fcc7e7eb5","order":7,"type":1},{"content":"https://img3.baa.bitautotech.com/img/V2img3.baa.bitautotech.com/dzusergroupFiles/2022/11/28/c83d81bb411f49e3a0b3e989ecc65b85_800_0_max_png.png","height":719,"id":"01b2d5accf987685","note":"防冻液是汽车冷却系中的重要介质,即使是高温当下的夏季,也不能用清水之类的液体代替防冻液,除去冷却功能,防冻液的除锈、除垢、防腐等性能是其他液体无法发挥的。","order":8,"type":2,"width":959},{"content":"https://img3.baa.bitautotech.com/img/V2img3.baa.bitautotech.com/dzusergroupFiles/2022/11/28/9d3ad57c74494db4a8e1be27a8b6b238_800_0_max_png.png","height":950,"id":"27804ee8e28720f9","note":"","order":9,"type":2,"width":1267},{"content":"https://img3.baa.bitautotech.com/img/V2img3.baa.bitautotech.com/dzusergroupFiles/2022/11/28/5b45a2c25bad470b92d7f9a5f8a52a96_800_0_max_png.png","height":950,"id":"03add63f9c395e82","note":"","order":10,"type":2,"width":1267},{"content":"https://img3.baa.bitautotech.com/img/V2img3.baa.bitautotech.com/dzusergroupFiles/2022/11/28/d94fc742c1774c289994927cb05aac73_800_0_max_png.png","height":950,"id":"8c752a97ab32b86e","note":"冷却系统的作用是在所有工况下,保证发动机在最适宜的温度下工作,冷却系统匹配的是否合适将直接影响到发动机的使用寿命和燃油经济性。","order":11,"type":2,"width":1267}]