According to the vibration motor manufacturer, the structure of the motor contains both electrical and mechanical parts, so its faults should be analyzed in two parts.The reason of motor vibration fault is divided into two parts.
Generally speaking, motor vibration is caused by unbalance of rotating parts, mechanical failure or electromagnetic reasons.
1, the rotating part of the imbalance is mainly caused by the rotor, coupler, coupling, transmission wheel imbalance.
The way to do this is to find the upstate sub-equilibrium.If there are large driving wheel, brake wheel, coupler, coupling, should be separated from the rotor to find a good balance.Again is the rotating part of the machine caused by loose.
2. Mechanical failures mainly include the following:
1) the linkage part of shafting is not right, the center line does not coincide, and the centering is not correct.
The main cause of this kind of fault is the installation process, on the poor, improper installation caused.
There is another case, that is, some linkage part of the center line is consistent in cold state, but after running for a period of time due to the rotor fulcrum, foundation deformation, the center line is destroyed, and thus produce vibration.
2) there is something wrong with the gear and coupling connected with the motor.This fault is mainly manifested as bad gear bite, serious tooth wear, poor lubrication of the wheel, the coupling askedness, dislocation, gear coupling tooth shape, tooth distance is wrong, clearance is too large or wear serious, will cause certain vibration.
3) structural defects and installation problems of the motor itself.
This fault is mainly manifested as ellipse of shaft neck, bending of shaft, too large or too small clearance between shaft and bush, insufficient stiffness of bearing seat, foundation plate, certain part of foundation and even the whole motor installation foundation, loose fixation between motor and foundation plate, loose bolt of bottom foot, loose between bearing seat and foundation plate, etc.
But between the shaft and the bush clearance is too big or too small not only may cause the vibration but also may cause the bush lubrication and the temperature to produce the abnormal.
4) the load driven by the motor conducts vibration.
3, part of the electrical failure is caused by electromagnetic reasons mainly includes: ac motor stator connection error, wound asynchronous motor rotor winding short circuit, synchronous motor excitation winding interturn short circuit, synchronous motor excitation coil connection error, cage asynchronous motor rotor broken bar, rotor core deformation caused by uneven air gap, rotor, lead to the air gap flux imbalance caused by vibration.
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Post time: Aug-31-2019
