Motor vibration causes and treatment of the play

The cause and management of motor vibration through drama - 2020 10 - 22 Wang Zhanguang ( Jiaozuo strong cement) Motor is widely used in cement production of each link, is to convert electrical energy to mechanical energy machine, cement production equipment operation is provided by the drag force. But when motor vibration, not only damage themselves, will damage the cement production equipment, energy consumption will increase, leading to production costs have risen sharply. The following talk about motor causes of severe vibration and processing. A, the cause of motor vibration motor vibration reason has its internal relations, also has the effect of external, boil down several aspects: 1. Motor bearing clearance is too large bearing clearance is too large, the rotary center along with the change of load change is bigger, the motor can produce vibration. 2. On both ends of the motor support different heart if on both ends of the motor shaft head, runtime, end will jump, produce vibration; When the shaft ovality is bigger, also can produce jumping and vibration. 3. Axial stiffness is insufficient or rotor unbalance when insufficient rigidity of shaft, run time due to the function of centrifugal force, magnetic field force, produces bend axis will be produced by the vibration, main performance in horizontal and two axial direction; If the rotor imbalance, also produces vibration, mainly displays in the horizontal direction. 4. Work machine vibration transfer when work machine vibration, often through the coupling and basic effect to the motor, vibration is produced. 5. Coupling concentricity caused vibration when coupling installation accuracy is not high, the runtime produces nothing, additional load increase, the vibration increases, mainly displays in the axial direction. 6. The anchor is loose or insufficient bearing stiffness local bolt looseness, bolt of vibration damping effect is reduced, the motor vibration; When the foundation stiffness is insufficient, as if spring, vibration is inevitable. 7. Motor air gap error around the uneven air gap, the magnetic field of the rotor pulling force is not uniform, prompting motor vibration, when there will be sweep chamber, vibration. 8. Stator, rotor magnetic center axial misalignment when motor rotor and the stator misalignment, before and after the alternating magnetic field will pull the rotor string of move, vibration is produced. Second, the harm of the vibration damage to the motor, first make electrical motor load increases, the vibration of foundation, equipment parts damage, affecting the service life of equipment, such as coil will burn motor due to loose; Vibration is a kind of energy, and doing is useless, so for energy consumption, is a waste. Three, motor vibration prevention and control of vibration for different reasons, the processing method is not the same, according to the causes of vibration do targeted processing, specific reference to the following way. 1. Tile or bearing clearance is too large to handle if the tile gap is too big, can reduce the gasket to adjust the tile edging, keep the top gap of around one over one thousand of the diameter of axle, if at this point, on the back cover with watts has clearance, you can add in gasket pressure. If the bearing clearance is too large, can be solved by changing the bearing. 2. Both sides different heart whether bearing coaxial on both ends of the first measurement, and adjust to the same axis. And if the axis of different heart, it must be by machining, ensure the concentricity. 3. Axial stiffness is insufficient or rotor imbalance that the axial stiffness is insufficient, should choose high strength material processing shaft for replacement, can increase the stiffness of the motor shaft. If the rotor unbalance, it must be on the dynamic balancing machine weight adjustment, make its balance precision grade. 4. Job machine vibration caused by machine vibration often passed on to the motor, it will need to find out the reason, to eliminate its effect on the motor. Such as vibration of blower unbalance through coupling to the motor. 5. Coupling is not good for the working machine with motor through coupling, if it is bad for the, can produce predominantly axial vibration, at this time, should be removed pin, to alignment of coupling, radial runout, by playing table face runout and clearance meet standard requirements, reduce the vibration. 6. Motor base loose or insufficient stiffness of anchor bolt is loose, the ability of damping vibration is reduced, the motor vibration increases, a fastening can at this time. Sometimes, because of a base if constantly fastening, the motor will be out of shape, change the operation precision of vibration motor, respectively adjusted gasket can solve. If the base stiffness is insufficient, can increase steel plate or replace base, improve the base stiffness. 7. Motor air gap uneven back to adjust the air gap, but the discomfort after operation due to vibration and loosening and wait for a reason, will cause the motor air gap is not uniform, at this time must be to adjust the air gap, its error is less than five percent. 8. Stator and rotor axial center deviating from the motor rotor and the stator axial misalignment, mobile, before and after changing magnetic field will pull the stator produce axial vibration, at this time should be cut coupling, start the motor, when its smooth, determine the position of coupling, and then find is, according to the position to solve the resulting vibration. Conclusion in this paper, the cause of the motor and the processing methods are explained and reference for the industry, deficiency, please correct me criticism.