AZML series three-phase AC electromagnetic brake

1. Schematic diagram of the structure is as follows:

2. Brake air gap requirements

3. Air gap inspection

As shown in the structural diagram, the distance between the armature 10 and the electromagnet 14 is called the air gap (δ). The normal working air gap (δ) does not exceed the specified working air gap value. When the motor leaves the factory, it is adjusted within the initial working air gap range. After running for a period of time, due to the wear of the friction pads, the air gap (δ) becomes larger, which will affect the normal attraction and braking effect of the brake. Therefore, after the motor has been used for a period of time, according to the large air gap value, select the feeler gauge size to check the size of the air gap (δ). During the inspection, the feeler gauge can be directly inserted into the air gap (δ). If it can be inserted, it indicates that the air gap (δ) is too large and needs to be adjusted.

4. Air gap adjustment

Prepare a set of feeler gauges of different thicknesses. Select the thickness according to the initial working air gap value in the table above. Loosen the nut 13, place the feeler gauge into the gap (δ) at the edge of the loosened screw, slowly tighten the lock nut 15, press the feeler gauge, and then tighten the nut 13 outwards, and pull out the feeler gauge. Use the same method to adjust the gaps at the two screws and three screws. After adjustment, tighten the nut 13 and the lock nut 15 again, and check regularly whether the nuts are loose.

For brakes with AZML132 or higher, there are 6 sets of screws. The above method can be used to adjust three sets first, and then another three sets, at 120° intervals. The three points of the gap adjustment must be uniform, otherwise it will affect the attraction and braking of the brake, and in severe cases, it will burn out the coil.

If there is no regular feeler gauge, similar thin iron sheets can be used instead.

5. Torque adjustment

When the air gap is normal and the braking torque does not reach the rated braking torque, the three nuts 12 (six for models above 132) can be uniformly tightened forward to compress the braking spring 11, which can increase the braking torque, but not too much. It is only necessary to reach the rated braking torque on the nameplate. Too much spring pressure will cause difficulty in attraction or a harsh electromagnetic squeak, and in severe cases, it will burn out the coil. Therefore, the spring force cannot be increased indefinitely.