Precautions For Using Centrifugal Fans

November 10, 2022

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The widespread use of centrifugal fans for ventilation, cooling, exhaust gas extraction, and dust extraction for industries is always a priority. However, when using a centrifugal fan, do you know the notes to help the centrifugal fan work effectively and increase its life of the centrifugal fan? Join us to learn the notes when using centrifugal fans in this article. Precautions For Using Centrifugal Fans

Safety measures when shutdown

Turn off the emergency

During the operation of the centrifugal fan, when one of the following cases occurs, the operator needs to perform an emergency shutdown of the device. This helps prevent possible dangerous incidents, protecting the fan from unnecessarily heavy damage.

The following are situations where emergency device shutdown is required:

– Detect noisy sounds such as scratches and abnormal friction inside the fan.

– Smoke is detected in the bearings and washers. Or detect a sharp rise in bearing temperature to alarm.

– When the oil pressure is lower than the alarm value, it cannot return to normal.

– Unusually strong vibration

Normal off

When you want to stop working on centrifugal fan equipment, please see the following operations to know how to turn it off normally, to help the fan operate for a long time and have a long life.

First, open the vent valve (or outlet valve). At the same time, gradually close the exhaust valve.

Gradually close the throttle to reach about 20-25 degrees.

Press the fan stop button, and pay attention to see if any strange phenomenon occurs during the shutdown.

Stop the oil supply while the unit is stopped for the first 5-10 minutes or when the bearing temperature drops below 45 degrees Celsius. For centrifugal fans with floating washers, the sealing oil pump needs to continue to supply oil. until the body temperature is below 80 degrees Celsius.

After the centrifugal fan stops working, the rotor needs to be rotated 180 degrees steadily for 2 to 4 hours.

Install centrifugal fan

Centrifugal fan equipment needs to be installed on a flat surface so that the fan can operate firmly and stably.

When installing parts, it is necessary to check carefully according to the provisions of the equipment’s technical documents.

Centrifugal fan is equipped with roller bearing, and the different axis of bearing holes on the two bearing frames can rotate flexibly after installing the impeller.

Debugging Notes

A centrifugal fan is a device with a simple structure, easy to install. However, for those who are not technically savvy, there may be errors when using centrifugal fans. Note the debugging methods below.

– Centrifugal fans can be started at a full voltage or reduced voltage. Note that the starting current at the sufficient initial voltage is about 5 to 7 times the rated current and that the starting torque of the voltage drops is proportional to the square of the voltage. When the grid capacity is insufficient, a reduced voltage current should be used.

– Check the wiring, and wiring diagram, whether the working voltage is enough for the fan or not, whether the power source is out of phase or in the same phase, and have all components and accessories installed during the test run. centrifugal fan.

– During the test run of the centrifugal fan, there should be more than 2 testers. One person controls the power supply, one observes the fan states. If an abnormality is detected, the test should be stopped immediately. Then check again: the current exceeds the rated current, and the current flowing of each phase is balanced… Then start operating again to check again.

Above is some information about the note when using a centrifugal fan. Hope the information mentioned in this article will help readers.

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