The Necessity of Dynamic Balancing Tests for Centrifugal Explosion-Proof Fans

The Necessity of Dynamic Balancing Tests for Centrifugal Explosion-Proof Fans

When analyzing the operating state of centrifugal explosion-proof fans, changes in gas specific volume are typically disregarded. In other words, gas is treated as an incompressible fluid. Centrifugal explosion-proof fan units are now available in right-handed and left-handed configurations. Viewed from the motor side, the impeller rotates clockwise in a right-handed fan, and counterclockwise in a left-handed fan. In practice, centrifugal explosion-proof fans can be regarded as variable-flow, constant-pressure devices. That is, at a given fan speed, the theoretical pressure-flow curve must be linear. Due to internal losses, the actual characteristic curve deviates. Additionally, the generated pressure is significantly affected by variations in intake air temperature and density. Compared to the specified intake volume, pressure decreases when intake air temperature (air density) is lower. From a practical standpoint, the equipment capacity of centrifugal explosion-proof fans may account for 30% to 40% of total power consumption. Therefore, strengthening maintenance of online fans, particularly addressing severe wear on fan impellers, is crucial. Such wear can cause rotor imbalance collapse, increasing overall fan vibration amplitude and severely impacting routine production operations. In summary, dynamic balancing tests for centrifugal explosion-proof fan equipment must be implemented in practical applications, with effective countermeasures addressing primary causes of imbalance. Over the years, fan maintenance and management have employed a straightforward mapping method. This involves locating the light spot position on the propeller, adding counterweights to the light spot location, and adjusting the wind turbine accordingly. In conclusion, to ensure the overall balanced and stable operation of centrifugal explosion-proof fans, dynamic balancing tests must be conducted on the equipment. This eliminates imbalance factors and maintains optimal working conditions.