How to find the motor vibration reasons of motor vibration what harm?

Motor is industrial production, the life that is commonly used in mechanical equipment of electric machinery, in use process, motor vibration, can cause what harm does, solve where motor vibration to find the reason; A, how to find the motor vibration reason 1, before the motor did not stop, with vibration table to check each vibration, the vibration of the larger parts according to the detailed test to three directions perpendicular to the horizontal axis vibration value, if it is loose bolts or bearing end cover screw loosening, can directly to tighten, tighten again after the vibration measurement size, observe whether there is to eliminate or reduce, secondly to check whether balanced three-phase voltage, three-phase fuse burn out phenomenon, the single phase operation can not only cause vibration of motor, still can make the motor temperature rise quickly, observe whether ammeter pointer is swinging back and forth, the rotor broken bar in current oscillation phenomenon, checks whether motor three phase current balance and found that the problem timely contact operators to stop the motor running, so as to avoid burning the motor. 2, if after the surface treatment, motor vibration is unresolved, continued to disconnect the power supply, loose coupling, the motor is connected with the load of mechanical separation, single motor. If you don't vibration motor itself, explain the source of vibration is caused by the coupling is not find or load machine, if the motor vibration, then there is something wrong with the motor itself, it also can take power method to distinguish is electrical, or mechanical reasons, when a power outage moment, motor vibration or vibration reducing immediately, then is electrical reason, otherwise is a mechanical failure. Second, the harm of motor vibration motor to produce vibration, can make the winding insulation and bearing life shorten, affect the normal lubrication of the sliding bearing, vibration motivated insulation gap to expand, make the dust and water invasion, which reduces the insulation resistance and leakage current increase, even to form insulation breakdown accident. In addition, vibration motor, vibration and easy to make the cooler water pipe crack, vibration welding points, at the same time can cause load mechanical damage, reduce the precision of workpiece, can cause all the mechanical parts by vibration fatigue, can make the anchor bolt is loose or break. Motor vibration and can lead to abnormal wear of carbon brush and slip ring, can appear even serious brush fire and burned collector ring, insulation motor will make a big noise, this kind of situation usually also have occurred in the dc motor.