How can the blades of explosion-proof centrifugal fans be improved?

How can the blades of explosion-proof centrifugal fans be improved?

Given the structural characteristics of explosion-proof centrifugal fans, one of their key features is that the main motor occupies a relatively small amount of space within the unit. The primary reason for this is the fan’s overall refined structure and compact design. If improvements are required, the volute and inlet components fixed to the original explosion-proof centrifugal fan can be easily removed. However, removing the volute and other components is actually only one step in the improvement process. In fact, the improvement process does not begin with practical work, but with calculations. Generally speaking, if one wishes to improve the blades of an explosion-proof centrifugal fan, one must first calculate the fan’s operating speed and diameter. These thorough calculations are necessary to avoid unnecessary problems during future operation. To aid understanding, we can illustrate this with an example. For instance, when the explosion-proof centrifugal fan has not been modified, it has 28 blades. Furthermore, these blades ensure a perfect fit with the wheel cover and disc during the welding process. Following measurement, the thickness of each blade is 3 millimetres. If the number of blades on the explosion-proof centrifugal fan is increased to 32, the additional four blades should be reinforced. In this case, the blade thickness should be increased from the original 3 mm to 4 mm or 5 mm. This is because only in this way can it be ensured that, following the modification of the explosion-proof centrifugal fan, the impeller accessories will function effectively, whilst fully guaranteeing the stability of the component layout during normal operation of the centrifugal fan.