Engine Fan

The main function of the excavator engine fan is to assist in cooling the engine and prevent it from overheating.

The cooling system of the excavator engine includes two main cycles: air circulation and coolant circulation. The engine fan rotates to draw in cold outside air, which is then directed into the engine compartment to cool the engine. This process involves multiple radiators, such as the hydraulic oil radiator, air conditioning radiator, and possibly an intercooler and the engine’s own heat sinks. These radiators, driven by the airflow generated by the fan, dissipate the heat generated during engine operation, ensuring that the engine operates at the appropriate temperature and avoiding performance degradation or damage due to overheating.

Furthermore, the selection and matching of the fan are crucial. The diameter of the fan is determined based on the size of the water radiator, overall machine dimensions, and the relative position of the fan and water radiator. The noise generated by the fan is related to the fan speed, so the tip speed of the fan blades is limited to below 90m/s to ensure the selection of the appropriate fan speed and transmission ratio of the fan drive mechanism for optimal cooling efficiency and noise control.

It is important to note that the sealing of the engine compartment is crucial for the efficiency of the cooling system. If the engine compartment seal is damaged or the engine hood is opened, it may affect the airflow drawn in by the fan, thereby impacting the cooling effectiveness. Therefore, maintaining a good seal in the engine compartment is an important aspect of ensuring the normal operation of the excavator.