What are the reasons for the vibration of the belt drive air conditioning fan blower motor with fan?

- Sep 30, 2019-

The motor vibration of a belt-driven air-conditioning fan is caused by unbalanced rotating parts, mechanical failure or electromagnetic causes. First, the imbalance of the rotating components is mainly caused by the imbalance of the rotor, the coupling, the coupling and the transmission wheel (brake wheel). The treatment is to first find a better balance. If there are large drive wheels, brake wheels, couplers and couplings, they should be balanced separately from the rotor. Another reason is the mechanical looseness of the rotating parts. For example, loose core support, tilt and pin failure and looseness, and loose rotor bond will result in unbalanced rotating components.

Second, the main faults of the mechanical part are as follows: 1. The shaft system of the connecting rod components is not aligned, the center lines are not coincident, and the alignment is incorrect. This type of failure is mainly caused by improper alignment and installation during installation. There is also a case where the center lines of some of the link members overlap in a cold state, but after a period of operation, the center line is broken due to deformation of the rotor fulcrum and the foundation, resulting in vibration.

2. There is a problem with the gears and couplings connected to the motor. Such failures are mainly caused by poor gear meshing, severe wear of gear teeth, poor lubrication of the wheels, skew and misalignment of the coupling, incorrect tooth profile and pitch of the gear coupling, excessive clearance or severe wear, all of which will cause certain problems. Vibration.

3. Defects in the structure of the motor itself and problems in the installation. This kind of failure mainly manifests as elliptical journal, bending axis, too large or too small gap between shaft and bearing bush, insufficient rigidity of bearing base, base plate, partial foundation or even whole motor installation foundation, unstable motor and base plate fixing, anchor bolt Loose, loose bearing housing and base plate. However, too large or too small a gap between the shaft and the bearing bush not only causes vibration but also causes abnormal lubrication and temperature of the bearing bush.

4. The load dragged by the motor is transmitted. For example, turbine turbine vibrations of turbine generators, fans, and pumps are driven by the motor to cause motor vibration.

Third, the failure of the electrical part is mainly caused by electromagnetic causes, including: AC motor stator wiring error, winding type asynchronous motor rotor winding short circuit, synchronous motor excitation winding turn-to-turn short circuit, synchronous motor excitation coil connection error, cage asynchronous motor The rotor broken strip, the rotor core deformation causes the air gap between the stator and the rotor to be uneven, resulting in the air gap magnetic flux imbalance resulting in vibration.https://www.ck-stone.com/