Reasons for the Decreasing Airflow in Explosion-Proof Centrifugal Fans

Reasons for the Decreasing Airflow in Explosion-Proof Centrifugal Fans

There are many reasons why the airflow in explosion-proof centrifugal fans may decrease. Some are related to the user, while others are related to the fans themselves. For users of explosion-proof centrifugal fans, the primary cause is typically changes to the ductwork or issues with the ductwork itself. For example, there may have been four exhaust outlets in the past, but due to production and ventilation needs, additional air ducts and exhaust outlets were installed. As a result, the airflow from the explosion-proof centrifugal fan is分散, leading to a reduction in airflow. Notably, air may not be blowing out from one end of the duct. This is because the pressure generated by the explosion-proof centrifugal fan itself is insufficient to overcome the resistance of the air ducts. In the former scenario, damage to multiple ducts can also be a cause of reduced airflow in explosion-proof centrifugal fans. Therefore, air ducts must be inspected regularly, and any damage must be repaired immediately upon discovery. Issues with the explosion-proof centrifugal fan itself are also a cause of decreasing airflow. Generally, dust accumulates on the impeller of an explosion-proof centrifugal fan. If the layer of dust accumulating inside the fan becomes thicker, the airflow will decrease. Dust buildup increases the weight of the impeller, causing it to rotate more slowly. Prolonged dust accumulation can disrupt the impeller’s balance, causing significant damage to the explosion-proof centrifugal fan. In such cases, the problem can usually be resolved by regularly cleaning the fan’s impeller. If there is buildup on the impeller, it is necessary to remove the impeller for cleaning. After removing the impeller for cleaning, it is advisable to perform dynamic balancing if conditions permit. Conclusion: When the airflow of an explosion-proof centrifugal fan decreases, first check whether there are issues with the ductwork or if dust has accumulated around the fan’s installation location. Regular inspection and maintenance of the operating environment of explosion-proof centrifugal fans is an effective and simple way to prevent a reduction in airflow.