Motor bearing have sound reasons analysis and maintenance

': analysis of the causes of the sound produced by the vibration and impact of retainer and rolling element, no matter what types of grease are likely to produce, torque, load or under radial clearance of age tend to produce more. Solution: A, improve retainer essence; B, choose the bearing clearance small or the exerted load bearing; C, to reduce the torque load, reducing installation error; D, choose good fats. 'Root cause analysis: the motor no-load running is similar as the buzzer sounds, and abnormal axial vibration motor, open or shut down' om-ing 'voices. Characteristics: multiple lubrication condition is bad, and in the winter of ball bearing motor, main shaft is self-aligning performance is bad, under the influence of the axial vibration of an unstable vibration. The solution: A, use the grease lubrication good performance; B, preload, reducing installation error; C, choose the bearings with radial clearance is small; D, improving motor bearing rigidity; E, strengthen bearing so. Note: 5 points have the effect of fundamental improvement, using small groove curvature, 02 01 big groove curvature. 3 motor bearing paint rust occur cause analysis: due to motor bearing chassis paint dry after oil, the chemical composition of volatile out corrosion of end face and outside groove bearings and channel, the channel is corrosion occurred after the abnormal sound. Characteristics: bearing surface rust corrosion than the first one side is more serious. Solution: A, the rotor, chassis, dry or drying after assembly; B, to reduce the motor temperature; C, choose to adapt to the paint model; D, the improvement of motor bearing placed environmental temperature; E, with oil, fat cause less corrosion, silicone oil, mineral oil, the most easy cause; F, the varnished vacuum technology. 4 motor bearing noise sound reason analysis: the impurity caused by bearing or the purity of the oil, the abnormal sound of an irregular. Characteristics: I have no my voice, when big small without rules, are on high speed motor. Solution: A, choose good grease; B, to improve cleanness of greasing before; C, strengthening the bearing sealing performance; D, improve the purity of the installation environment. 5 send out high frequency, vibration motor bearing 'man. 。 。 。 。 'Specific characteristics: voice frequency change with bearing rotating speed, and the parts surface waviness is the main cause of the noise. The solution: A, improve the quality of bearing raceway surface processing, reduce waviness amplitude; B, reduce the collision; C, fixed clearance and cooperate with the prestressing force, check the free end bearing operation, improve the precision of the shaft and bearing installation method. 6 motor bearing temperature overheating characteristics: bearing after operation, temperature is beyond the scope of requirements. Cause analysis: A, too much grease, lubricant resistance increased; B, the clearance is too small to cause the internal load is too large; C, the installation error; D, friction sealing equipment; E, bearing the crawl. The solution: A, choose the correct grease, appropriate dosage; B, correct clearance pre-tightening force and cooperate, check the workings of the free end bearing; C, improve the accuracy of bearing seat and installation method; D, improvement of sealing form. 7 motor bearing feel bad characteristics: feel when using a hand bearing rotating rotor bearing inside impurity, block. Cause analysis: A, clearance is too large; B, with the inner diameter and axial improper; C, channel injury. The solution: A, smaller clearance as much as possible; B, the selection of tolerance zone; C, improve accuracy and reduce the damage to the channel, D, selection of grease.