The vibration noise produced by the mechanical bearings of the motor is generally caused by the unbalance of the rotor. 3.2 The vibration of the bearing resonates with the motor, or the friction sound is caused by poor lubrication. 3.3 The brush slides, causing vibration and noise in the motor. 3.4 The fluid vibration noise of the motor, the vibration noise of the ventilation motor caused by the fan or rotor is difficult to avoid for the motor. Many situations affect the overall motor vibration noise of the motor. In addition to the air whistle sound caused by the fan blades or the teeth of the iron core, attention should also be paid to ventilation. resonance.

The electromagnetic vibration noise of the motor is the vibration noise of the motor caused by the unbalanced or unbalanced magnetic force of the magnetic circuit and the electromagnetic force wave of the air gap, or the vibration noise of the magnetic motor caused by the saturation of the magnetic flux density or the eccentricity of the air gap. Abnormal bearings produce motor vibration and motor vibration noise. Countermeasures: Replace the bearings. ·Properly preload the spring in the axial direction to avoid changes in the axial clearance of the bearing.

Choose soft grease or grease with excellent low-temperature properties. The remaining gap should be small (but attention must be paid to temperature rise issues). Table of main parameters of various structural types of bearings for motors Reasons: ·The bearing may be damaged internally. ·The axial abnormality of the bearing causes motor vibration, which is caused by the excitation effect of the motor vibration system composed of the axial spring constant and the rotor mass. ·Friction sound: caused by poor lubrication and bearing clearance in cylindrical rolling bearings or large-diameter high-speed ball bearings.