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Bearing abnormal sound analysis and processing
Source: China Bearing Network Time: 2018-05-13
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Analysis of the causes: oscillations and triggers by the adherer and the rolling body; no matter how the smooth fat variety can attack; the time when the torque, load or radial clearance is large is simpler.
Treatment: A, progress to adhere to the fine, B, select a bearing with small clearance or preload the bearing, C, reduce torque load; reduce 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 abnormal axial oscillation; there is a "beep" sound when it is turned on or off.
Detailed features: The situation of multiple illuminating and sliding is not good; in winter, the motor with ball bearing at both ends is more frequent; mainly when the shaft aligning function is not good; an unstable oscillation occurs under the influence of axial oscillation.
Treatment methods: A, use smooth grease, B, add preload; reduce device errors, C, select bearings with small radial clearance, D, improve motor bearing rigidity, E, strengthen the bearing's self-aligning.
Note: The effect of improving the bottom point is the fifth point; the curvature of 02 small groove is selected; 01 large groove curvature.
3, paint rust:
Analysis of the reason: because the motor bearing shell paint oil is dry; the chemical composition announced by the wave etches the end face, outer groove and channel of the bearing; the anomalous sound that causes the channel to corrode.
Detailed features: After being corroded, the bearing surface rust is more severe than the first surface.
Treatment methods: A, the rotor, the casing, drying or drying equipment, B, lowering the motor temperature, C, using the type of custom paint, D, improving the ambient temperature of the motor bearing placement, E, using customary grease; Grease causes less rust; silicone oil, mineral oil is the most likely to cause, F, vacuum varnish process.
4, impurity sound:
Analysis of the cause: caused by the cleanliness of the bearing or grease; announcing an irregular anomalous sound.
Detailed features: there are occasional sounds; there are no rules when the time is big; more on high-speed motors.
Treatment methods: 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 external waviness of the part is the main cause of noise.
Treatment methods: A, improve the processing quality of the bearing raceway surface; reduce the waviness amplitude, B, reduce the bump, C, modify the clearance preload and cooperation; view the work of the free end bearing; improve the accuracy of the shaft and the bearing housing Device approach.
6, warming up:
Detailed features: After the bearing works; the temperature exceeds the scale of demand.
Analysis of the reasons: 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, device error, D, the conflict of the seal, E, the bearing åŒåŒ.
Treatment: A, select the correct grease; use the right amount, B, modify the clearance pre-tightening force and cooperation; view the working condition of the free end bearing, C, improve the bearing seat accuracy and device method, D, improve the sealing method.
7, the bearing feels poor:
Detailed features: When holding the bearing and rotating the rotor, I feel the impurities and blockage inside the bearing.
Analysis of the reasons: 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 done. B, the selection of the public service belt, C, progress accuracy; reduce the damage of the channel, D, grease selection.
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