1. Reasonable selection of bearings and grease Different occasions have different requirements for motor power, installation type, protection level, and load type. There are also great differences in the selection of bearings. Choosing the corresponding correct bearing can adapt to the operating requirements of the equipment and reduce the occurrence of failures during use. Different types of motors select corresponding bearing types, small motors use ball bearings; medium-sized horizontal motors need to use roller bearings, and non-drive end bearings are used to ensure the radial force of the rotor.
Angular contact ball bearings are selected for medium-sized vertical motors. Three-phase AC asynchronous motors usually use open deep groove ball bearings. Rolling bearings for motors generally use No. 2 lithium-based grease and No. 3 lithium-based grease, because lithium-based grease has better performance than other greases and has a wide applicable temperature range. For derivative series motors, lithium-based grease is used to seal the bearings, which reduces the frequency of bearing maintenance and increases the service life of the bearings. Compared with bearings with high speed and heavy load, lithium-based molybdenum disulfide grease is often used. Grease should be cleaned frequently, and the same type of grease should be replaced in time.
2. Adopt good motor assembly technology and protection and detection technology. During the operation of the motor, the bearing itself will be offset due to the axial electromagnetic. At this time, the motor will have a lower frequency buzzing sound. Therefore, it is necessary to apply a pair of The pre-applied axial pressure on the outer ring of the bearing can eliminate noise. The method adopted is to add a wave washer on the outside of the bearing to ensure normal bearing clearance. Induction AC Motors Suppliers eccentricity detection is performed on the air gap magnetic field of the motor, real-time monitoring of motor wear, and by observing the change trend of motor eccentricity, the hidden troubles of bearing wear and bearing deviation from normal track can be found as early as possible to avoid bore sweeping accidents.
3. Regularly check the bearing damage to check the radial clearance of the bearing and determine the bearing damage. When the bearing is worn seriously, the motor will produce relatively loud noise, which means that a new bearing needs to be replaced.
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