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How to determine whether the fan of the box filter is faulty?
How to determine whether the fan of the box filter is faulty?To determine whether the fan of the box filter is faulty, it can be checked from the following aspects:Observe operating status Abnormal speed: The speed of the fan is stable and meets the specified parameters. If the fan speed is found to be significantly slower or faster, it may be a motor failure, power supply problems or transmission components are abnormal, resulting in the fan can not reach the normal speed. Vibration: The fan will have a certain degree of vibration during operation, but if the vibration is significantly aggravated, accompanied by jitter or shaking, it may be caused by unbalanced impeller, bearing damage, motor failure, or unstable installation. The intensity of the vibration can be felt and measured by touching the fan housing or using a vibration detector. Running sound: Normal fan running sound is smooth and even, only slight wind and motor running sound. If there is harsh, friction, impact, or other abnormal noise, such as the "buzz" sound becomes louder, there is a "click" sound, etc., usually indicates that there is a fault in the fan, which may be the friction between the impeller and the housing, bearing wear, motor winding short circuit and other problems. Check electrical parameters Voltage measurement: Use a voltmeter to measure the input voltage of the fan motor to ensure that the voltage is within the range specified by the equipment. If the voltage is too high or too low, it will affect the normal operation of the fan and even lead to motor damage. Generally speaking, the fluctuation range of industrial electricity voltage should be within ±10% of the rated voltage, and the fluctuation range of civil voltage should be within ±7%. Check the current: Measure the current of the fan when it is running through the ammeter. If the current exceeds the rated current of the motor, it indicates that the motor load is too large, which may be caused by a blocked fan impeller, bearing damage, or power failure. If the current is too small, the motor winding may be broken or the power supply contact is poor. View fan components Impeller inspection: After shutdown, open the fan shell to check whether the impeller is worn, deformed, cracked, or loose. The damage of the impeller will cause the performance of the fan to decline, and even cause vibration and noise. At the same time, check whether there is a large amount of dust or debris accumulation on the impeller, which may also affect the balance of the impeller and the operating efficiency of the fan. Bearing inspection: Check the bearing for signs of wear, lack of oil, or damage. It can be judged by observing whether there are wear marks on the bearing surface, whether the ball is loose or damaged, and whether there is oil leakage. In addition, rotate the bearing by hand to feel whether it rotates smoothly and whether there is stuck or abnormal resistance. Motor inspection: Check the appearance of the motor for signs of overheating and burning, and smell for odors, which may be a sign of short circuit or overload in the motor winding. At the same time, check whether the wiring of the motor is firm and whether there is loosening, oxidation, or a short circuit. In addition, it can also determine whether the fan is faulty by comparing the actual operation effect of the box filter with the parameters under normal working state. If the airflow is significantly reduced, the filtration effect is worse, etc., it may also be related to the fan failure. If there is still doubt about the fault judgment of the fan, it is recommended to contact professional maintenance personnel or technicians for further testing and diagnosis. |
