Motor bearing abnormal sound analysis and processing

Source: China Bearing Network Time: 2013-05-31

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1. Persist in the sound of the instrument "Blessing profit..."
Analysis of the cause: the oscillation of the adherent and the rolling body, triggering; whether the smooth fat variety can attack; the time of receiving the torque, load or radial clearance is simpler.
A, progress and persistence
B. Use a bearing with a small clearance or apply a preload to the bearing.
C, falling torque load; reducing device errors
D, choose good grease
2, consecutive beeps "å—¡å—¡..."
Analysis of the reason: the motor no-load work is to announce the same sound of similar buzzer; and the motor has an asymmetrical axial oscillation; there is a "beep" sound when it is turned on or off. Detailed features: the multi-glowing condition is not good; the motor with ball bearings at both ends in winter Multiple; mainly when the shaft alignment function is not good; an unstable oscillation treatment method under the influence of axial oscillation:
A. Use smooth and functional grease
B, add preload; reduce device errors
C. Select bearings with small radial clearance
D, progressive motor bearing housing rigidity
E, strengthen the bearing's self-alignment Note: the fifth point to improve the effect of the bottom; select 02 small groove curvature; 01 large groove curvature.
3, the analysis of the cause of paint rust: because the motor bearing shell paint oil after drying; the chemical composition announced by the wave of corrosion of the end face, outer groove and channel; the channel is corroded after the anomalous sound features: after corrosion The bearing surface rust is more severe than the first side:
A. The rotor, the casing, the drying or drying device
B, drop motor temperature
C, choose the type of custom paint
D. Improve the ambient temperature of the motor bearing placement
E, using customary oils; fat oil leads to less rust; silicone oil, mineral oil is the most likely to cause
F, using vacuum dipping process
4, the impurity sound edge analysis: caused by the cleanliness of the bearing or grease; announcing an irregular anomalous sound features: the sound even occasionally; when there is no time, there is no rule; on the high-speed motor, multiple treatments:
A, choose good grease
B, improve the cleanliness before grease injection
C. Strengthen the sealing function of the bearing
D. Cleanliness of the improved installation environment
5, high frequency, oscillating sound "å“’å“’....."
Detailed features: The sound frequency changes with the bearing speed; the external waviness of the part is the main cause of noise.
Treatment method:
A. Improve the quality of the bearing raceway surface; reduce the waviness amplitude
B, reduce bruises
C. Correcting the clearance preload and cooperation; checking the work of the free end bearing; improving the precision of the shaft and the bearing seat
6. Detailed characteristics of temperature rise: After the bearing works; the reason for the temperature exceeding the demand is analyzed:
A, too much smooth grease; increased resistance of the smoothing agent
B. If the clearance is too small, the internal load is too large.
C, device error
D, conflict with the seal
E, the handling method of the bearing:
A, choose the right grease; the right amount
B. Correct the clearance preload and cooperation; check the working condition of the free end bearing
C. Improve the accuracy of the bearing housing and the device method
D, improve the sealing method
7. The bearing feel is not good. Detailed features: When the rotor is rotated by hand, the inside of the bearing feels the impurity and blockage of the bearing.
A, the clearance is too large
B, the cooperation between the inner diameter and the shaft is not appropriate.
C, channel damage treatment methods:
A, the play can be small
B. Selection of public service belt
C, improve accuracy; reduce channel damage
D, grease selection

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