1.工程机械的热平衡(1)发热源工程机械在运行中会产生热量,其发热源主要有3种:一是柴油机燃烧系产生的热源;二是液压传动和其他传动系的运动副在运行中产生摩擦热;三是液压油在液压系统内流动产生的压力能转化为热量,散发到液压油和机件中。此外,在有太阳辐射的场合作业,还要承受太阳的辐射热,其作业环境温度可达37～60℃。 1 heat balance of construction machinery (1) heat source Construction machinery in the operation will produce heat, the heat source are mainly three kinds: First, the heat generated by the combustion system of diesel engine; Second, hydraulic transmission and other drive train movement in the operation In the frictional heat generated; third is the pressure generated by hydraulic oil flow in the hydraulic system can be converted into heat, distributed to the hydraulic oil and mechanical parts. In addition, in the case of solar radiation work, but also to bear the sun’s radiant heat, the operating environment temperature up to 37 ~ 60 ℃.