要进行伸缩臂挖机租赁的话，就可以清楚的知道伸缩臂发掘机是一种多功用工程机械，作业灵敏，消费效率高，工况顺应才能强，在交通运输、水利及电力工程和矿山采掘中发挥着重要的作用，由于液压伸缩臂发掘机工况条件比拟恶劣：粉尘大、温度高、重负荷及连续作业。
If you want to rent the telescopic boom excavator, you can clearly know that the telescopic boom excavator is a multi-functional engineering machinery with sensitive operation, high consumption efficiency and strong adaptability to working conditions. It plays an important role in transportation, water conservancy and power engineering and mining. Due to the poor working conditions of the hydraulic telescopic boom excavator: large dust, high temperature Heavy load and continuous operation.
发起机和液压系统做工时产生较多的热量，据统计，在液压伸缩臂发掘机的毛病中，大局部毛病来于发起机与液压系统过热。因而，牢靠的散热系统是保证伸缩臂发掘机性能稳定的重要要素。
The engine and hydraulic system generate more heat when working. According to statistics, among the problems of the hydraulic telescopic boom excavator, most of the problems come from the overheating of the engine and hydraulic system. Therefore, a reliable heat dissipation system is an important factor to ensure the stable performance of the telescopic boom excavator.
1、优化设计 散热系统散热量Q与冷 却风流量M，散热面积A成正比，与进风温差Δt3成反比，即Q=f（M、A、Δt3），因而改 善散热系统的散热性能要从这三个关键因子采取计划。

1. Optimize the design of the heat dissipation system, the heat dissipation q is directly proportional to the cooling air flow m and the heat dissipation area a, and is directly proportional to the inlet air temperature difference Δ T3 is inversely proportional, i.e. q = f (m, a Δ T3), so to improve the heat dissipation performance of the heat dissipation system, we should take plans from these three key factors.
2、增加冷却风流量 液压伸缩臂发掘机风扇优先采用低速、大直径吸风型风扇，应用外部低温空气冷 却液压油和冷却水，相比高速、小直径风扇冷 却效果好和噪音低。因而，风扇的叶尖处线速度不能超越4200～5000m/min，满足装置尺寸的状况下风扇直径尽量选大。
2. Increase the cooling air flow. The low-speed and large-diameter suction fan is preferred for the fan of the hydraulic telescopic boom excavator. The external low-temperature air is used to cool the hydraulic oil and cooling water. Compared with the high-speed and small-diameter fan, the cooling effect is better and the noise is lower. Therefore, the linear speed at the blade tip of the fan shall not exceed 4200 ~ 5000m / min. when the size of the device is met, the fan diameter shall be as large as possible.
3、风扇与导风罩的轴向重合宽度 关于吸风型风扇来说，普通取风扇叶投影宽度的2/3宽度被导风罩罩住，此时能到达大吸风效率，另外，导风罩和散热器须密封紧密，保证冷 却风不流失。
3. The axial coincidence width of the fan and the air guide cover. For the air suction fan, generally take 2 / 3 of the projected width of the fan blade and be covered by the air guide cover. At this time, the large air suction efficiency can be achieved. In addition, the air guide cover and the radiator must be tightly sealed to ensure that the cooling air is not lost.