How to Calibrate the Balance Performance of Cabinet-Type Fire-Rated Centrifugal Fans?

How to Calibrate the Balance Performance of Cabinet-Type Fire-Rated Centrifugal Fans?

In fact, many factors can significantly affect the vibration levels of cabinet-type fire-rated centrifugal fan equipment, such as impeller balance, transmission components, rotational speed, motor operation, and wiring configurations. Therefore, to ensure that cabinet-type fire-rated centrifugal fan equipment meets standard vibration requirements, we must take these details into account. Below, we will provide a brief analysis and discussion on this topic, hoping to give readers a better understanding of the balancing of cabinet-type fire-fighting centrifugal fan impellers, parameter settings, vibration testing procedures, and some typical vibration analysis techniques. First, let’s analyze impeller balancing. We know that different types and sizes of products have different application standards. However, under normal circumstances, during assembly, the residual unbalance of the impeller assembly should be adjusted to fall within the permissible range. If this limit is exceeded, it will affect the performance of the cabinet-type fire-fighting centrifugal fan equipment in actual operation. Balancing primarily involves adding or removing weight on one or more planes of the rotor to bring the center of gravity closer to the axis of rotation. From this explanation, we can see that to achieve a satisfactory balance, we need to add or remove weight. In practice, we often choose to add weight to achieve balance. Of course, depending on the type and size of the cabinet-type fire-fighting centrifugal fan equipment, we can employ different methods to add weight. However, it should be noted that this method of adding weight is generally effective only for low-speed, low-load cabinet-type fire-fighting centrifugal fan equipment. As operating speed and size increase, stainless steel bolts, nuts, washers, etc., should be used instead of metal clamps as balancing weights.