What should be paid attention to in the maintenance of centrifugal fans

About Centrifugal Fan:

What should be paid attention to in the maintenance of centrifugal fans

Centrifugal fans are common equipment in many industrial and commercial settings. They are often used to move air or other gases and liquids. Despite their simple design, centrifugal fans are a powerful tool and should be used with caution. This article will discuss what you need to know about centrifugal fans.

1. Centrifugal fans are allowed to start at full voltage or to reduce voltage, but it should be noted that the current at full voltage starting is about 5-7 times the rated current, and the voltage reduction starting torque is proportional to the square of the voltage. When the grid capacity is insufficient, A reduced voltage start should be used.

2. During the test run of the centrifugal fan, you should read the product manual carefully and check whether the wiring method is consistent with the wiring diagram; you should carefully check whether the working voltage of the power supply to the fan meets the requirements, whether the power supply is out of phase or in the same phase, and whether the electrical components are distributed. Whether the capacity meets the requirements.

3. There should be no less than two people during the test run, one person controls the power supply, the other person observes the operation of the fan, and immediately stops the inspection if any abnormality is found; first, check whether the rotation direction is correct; after the centrifugal fan starts to run, immediately check whether the running current of each phase is balanced. , Whether the current exceeds the rated current; if there is any abnormal phenomenon, it should be stopped for inspection. After running for five minutes, stop the fan to check whether there is any abnormal phenomenon, and then start the operation after confirming that there is no abnormal phenomenon.

4. During the test run of the two-speed centrifugal fan, start at low speed first to check whether the rotation direction is correct; when starting at high speed, the fan must be stopped before starting to prevent the high-speed reverse rotation, which will cause the switch to trip and the motor to be damaged.

5. When the centrifugal fan reaches the normal speed, it should be measured whether the input current of the fan is normal, and the running current of the centrifugal fan should not exceed its rated current.

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