搅拌机又叫混凝土搅拌运输机，在建筑工地上使用较多，属于专用机的一种，随着社会的发展，搅拌机的使用越来越广泛，不知道大家发现没有，很多的大机在冬天启动的时候，都是先让发动机响一会儿，再起步行驶，这就叫做热机，那么搅拌机为什么要热机呢？

Mixers, also known as concrete mixer conveyors, are used more on construction sites and belong to a kind of special machines. With the development of society, mixers are used more and more widely. I wonder if you have found that many large machines start in winter by letting the engine ring for a while before starting. This is called a hot machine. So why do mixers need hot machines?

一般情况下，专用机的发动机的正常使用温度在85℃-95℃之间，当发动机在这个温度的时候，其它各部分的配合间隙正好在设计的范围内，燃烧室内的燃烧状态好，发动机的热效率和各方面性能处于佳状态，如果低于这个温度，那属于发动机过冷，这会对发动机的使用寿命造成很大的影响的。

Generally, the normal operating temperature of the engine of the special engine is 85 ℃ - 95 ℃. When the engine is at this temperature, the fit clearance of other parts is just within the design range. The combustion condition in the combustion chamber is good, and the thermal efficiency and performance of the engine are in good condition. If the temperature is lower than this, the engine is too cold, which will have a great impact on the service life of the engine.

经研究表明，发动机的磨损在80%是发生在冷启动的一瞬间，发动机在低温时的磨损是正常工作温度的6倍；发动机在40℃-50℃时，发动机的磨损增加60%-80%，功率降低25%，油耗增加8%-10%，机油的性能衰减也更快，如果是在气温比较低的北方，那么搅拌机的热机时间将会更长。

The research shows that 80% of the engine wear occurs at the moment of cold start, and the engine wear at low temperature is 6 times of the normal operating temperature; When the engine is at 40 ℃ - 50 ℃, the wear of the engine increases by 60% - 80%, the power decreases by 25%, the fuel consumption increases by 8% - 10%, and the performance of the engine oil decays faster. If the engine is in the north where the temperature is relatively low, the hot engine time of the mixer will be longer.

低温除了影响发动机外，还会对其它方面的性能造成影响，比如低温会导致电瓶容量大幅度下降，机辆启动困难；还可能会导致轮胎变硬、变脆，与地面的附着力降低，机辆的操控性下降，减震器的油液粘度增加，缓冲吸振的能力会下降，机辆就会发生异响，乘坐的舒适性就会下降；变速箱的油的粘度变大，造成换挡困难。

In addition to affecting the engine, the low temperature will also affect other aspects of performance, such as the low temperature will lead to a significant decline in battery capacity, making it difficult to start the locomotive and vehicle; It may also lead to hard and brittle tires, reduced adhesion to the ground, decreased vehicle handling, increased oil viscosity of shock absorbers, reduced ability to buffer and absorb vibration, abnormal noise, and decreased ride comfort; The viscosity of the oil in the transmission becomes larger, causing difficult shifting.

现在的很多的混凝土搅拌机会安装节温器、使用风扇离合器或者电子风扇、自动调节开度的百叶窗、内置式排气管等等，来缓解低温对发动机造成伤害。但是在低温状态下热机还是非常有必要的，热机的时间也要适当，一般在一分钟左右就差不多了。更多相关内容就来我们网站http://www.zkhntjbj.com咨询吧！

Nowadays, many concrete mixers are equipped with thermostats, fan clutches or electronic fans, louvers with automatic opening adjustment, built-in exhaust pipes, etc., to alleviate the damage caused by low temperature to the engine. However, it is very necessary to heat the engine at low temperature, and the time of the heat engine should be appropriate, usually about one minute. More relevant content will come to our website http://www.zkhntjbj.com Consult!