Bearing abnormal sound analysis and solution

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1, to keep the acoustic "Hey Lee Hey Lee ......":
Cause Analysis: keep rolling element vibration, shock generated, regardless of how the grease types are likely to produce, to withstand the torque load or radial clearance is more prone.
Workaround: A raise retainer fine; B, the selection of the bearing clearance or pre-load is applied to the bearing; C, reducing the torque load, reduce installation errors; D, a good selection of oils and fats.
2 consecutive beeps "hum ...":
Analysis: motor no load operation is issued a similar beep sound and abnormal vibration motor axial "Om" sound, open or shut down.
Specific features: multiple lubrication is not good, winter, and both ends of the multiple ball bearing motor shaft aligning performance is bad, the axial vibration under the influence of an unstable vibration.
Solution: A good grease lubrication performance; the B plus preload, reducing installation error; C, use small radial clearance bearings; D, improve motor bearing stiffness; E, strengthening bearings-Mind.
Note: the fifth point play a fundamental improvement in the role, with 02 minor groove curvature 01 major groove curvature.
3, pai nt and rust:
Analysis: motor bearing chassis Paints dry, out of the volatile chemical composition of corrosion to the end face of the bearing outer ditch, channel, so that the occurrence of abnormal sound channel is corrosion.
Specific characteristics: corrosion bearing surface rust more than the first side. bearing manufacturers
Solution: A, rotors, chassis, dry or drying after assembly; B, lower motor temperature; C, chosen to adapt to the paint models; D, improve motor bearings placed ambient temperature; E, with adaptation grease, the fat cause corrosion, silicone oil, mineral oil, most likely caused by; F, vacuum dipping process.
4, impurities sound:
Analysis: issued an irregular abnormal sound caused by the cleanliness of the bearing or grease.
Specific characteristics: voice occasionally even no, sometimes big, sometimes small is no rule, multiple high-speed motor .
Solution: A good selection of oils and fats; B, to improve before greasing cleanliness; C, strengthen the bearing sealing performance; D to improve the cleanliness of the installation environment.
5, high-frequency, vibrating sound "da da ...":
Specific characteristics: sound frequency varies with the speed of the bearing, the parts of the surface waviness is the main cause of the noise.
Solution: A, to improve the surface quality of the bearing raceway, reducing the waviness amplitude; B, reduce bruising; operation of the C correction clearance preload and fit, check the free end bearing, to improve shaft and bearing accuracy installation method.
6, heating up:
Specific characteristics: bearing operation, the temperature is outside the scope of the requirements.
The reason: A, excess grease, lubricant resistance increases; B clearance is too small to cause internal load is too large; the C installation error; D sealing e quipment friction; E, bearings, crawling.
Solution: A selection of the right fats, appropriate dosage; the B correction clearance preload and fit, check the functioning of the free end of the bearing; C, to improve the chock accuracy and installation methods; D, improved seal forms. double bearing
7, bearing feel bad:
Specific characteristics: hand bearing rotating rotor feel the bearings inside impurities, block flu.
Cause Analysis: A clearance is too large; mismatch of B, the inner diameter of the shaft; C-channel damage.
Solution: A clearance as much as possible to be small; the B tolerance zone selection; C, improve accuracy, reduce the damage to the channel; D, grease selection.