Analysis and treatment of abnormal sound of motor bearing

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Analysis and treatment of abnormal sound of motor bearing

Source: Bearing network time: 2017-12-16

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1. Persist in the sound of "the profit..."
Analysis of the reasons:
Oscillation and triggering by the applicator and the rolling body; it can be attacked regardless of the smooth fat variety; the time when the torque, load or radial clearance is large is simpler.
A. Improve the accuracy of the adherent B. Select a bearing with a small clearance or apply a preload C to the bearing and reduce the moment load; reduce the device error D, select a good grease 2, and then connect the buzzer "å—¡å—¡..."
Analysis of the reasons:
The no-load operation of the motor 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.
The situation of multiple illuminating and sliding is not good; in winter, there are many motors with ball bearings at both ends; mainly when the shaft aligning function is not good; an unstable oscillating treatment method under the influence of axial oscillation A, using a smooth and functional grease B Add preload; reduce device error C, select bearing D with small radial clearance, improve motor bearing housing steel E, strengthen bearing centering 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 case paint is dried after the oil; the chemical composition of the fan is corroded by the end face, the outer groove and the channel of the bearing; the abnormal sound of the attack after the channel is corroded is detailed:
After being corroded, the bearing surface rust is more severe than the first side:
A. Rotating the rotor, casing, drying or drying device B, lowering the motor temperature C, selecting the type of custom paint D, improving the ambient temperature of the motor bearing placement E, using customary grease; grease causing less rust; silicone oil, The mineral oil is most likely to cause F, the vacuum dipping process is selected, and the impurity sound is analyzed:
Caused by the cleanliness of the bearing or grease; announcing an irregular anomalous detail:
There are occasional sounds; there are no rules when there are large and small times;
A, choose good grease B, improve the cleanliness before grease injection C, strengthen the sealing function of the bearing D, improve the cleanliness of the installation environment 5, high frequency, oscillating sound "å“’å“’...."
Detailed features:
The sound frequency changes with the bearing speed; the waviness of the part is the main cause of noise.
Treatment method:
A. Improve the processing quality of the bearing raceway; reduce the waviness amplitude B, reduce the bump C, correct the clearance preload and cooperation; view the work of the free end bearing; improve the accuracy of the shaft and the bearing device. Detailed features:
After the bearing works; the reason for the temperature exceeding the demand is analyzed:
A, too much smooth grease; the resistance of the smoothing agent increases B, the clearance is too small, the internal load is too large C, the device error D, the conflict of the seal E, the handling of the bearing:
A. Select the correct grease; use 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 seat and the device method D, improve the sealing method 7. The bearing feel is not good.
When the rotor is rotated by hand, the inner friction and the sensation of the bearing are felt.
A, the clearance is too large B, the cooperation between the inner diameter and the shaft is not appropriate C, channel damage treatment:
A, the clearance can be as small as B, the choice of the civil service belt C, improve the accuracy; reduce the damage of the channel D, grease selection
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