Some problems with centrifugal fans

About Centrifugal fan:

Some problems with centrifugal fans

What are the reasons for the unstable speed of the centrifugal machine

1. What is the problem with one of the four rectifier diodes.

2. There is carbon powder between the rotor and the motor commutator or the motor carbon brush itself is not good. Adhering to the targeted maintenance standards, the variable resistance is measured accurately first, and the resistance value changes periodically with the adjustment, which proves that the resistor It's good, and no problem can be found by measuring the thyristor accurately, because the diode is a high-current gold-sealed tube, one end is screwed on the circuit board, and the other end is welded to the circuit board by wire wrapping and electric welding, and then removed from the circuit board. When it is found that the positive and negative are loose, and then shake it while accurately measuring, confirm that the diode is intermittent.

3. There are many occurrences of thyristors, generally penetrating short-circuit faults, leading the way, not being able to open or poor internal contact.

4. Variable resistance, the vertical centrifugal fan is installed on the operation panel because of the variable resistance, the application frequency is particularly high, and the looseness is very common after a long time.

What are the reasons for the abnormal temperature of the centrifugal fan

1. The current of the centrifugal fan motor is too large:

When the centrifugal fan is working, in order to better ensure that it is in a normal operating state, we must provide it with all normal power supply voltages. However, there are also some factors that will cause its motor current to increase. For example, due to the strong vibration of the rolling bearing box, or when the Roots blower is turned on, the water gates of its intake and exhaust pipes are not immediately closed, or the speed ratio of the main shaft bearing is too large, Exceeding the standard value, or the input working voltage of the diagonal flow fan motor is too low, or the power supply of the motor is turned off for a single project.

2. The temperature of the rolling bearing of the centrifugal fan is too high:

For the content of this part, we can consider it according to four levels, it may be because the force distance between the rolling bearing cover of the centrifugal fan and the anchor bolt of the seat is too large or too small; the second is because the rolling bearing box has occurred Relatively strong vibration problem; the roller bearing of the third centrifugal fan is destroyed; the fourth is because the lubrication is not enough, or there is more residue in it.

Where to buy Centrifugal fan

AFL Fan Equipment Factory is a leading China centrifugal fan supplier and axial fan manufacturer. We have our own production workshop and design team. If you cooperate with us, we can provide you with first-hand prices.

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