Date: 2013-08-20

Motor bearing noise characteristics and countermeasures

Bearing noise:
    Inherent noise ------ raceway tone
    2, based on the conditions of use of the noise ----- holder tone
    3, caused by improper use ------- 1) wounds tone (inner and outer rings, steel ball)
------- 2), foreign body tone
1, wounds tone (brinelling)
Background: After the motor assembly, noise check and found that the noise
Features: continuous issued the "carbazole Lala ......." sound
Reason: the shaft is pressed into the axis of the shaft collar or bearing housing, bearing internal Brinell indentation
Countermeasures: resistance to dents bearing design to improve the assembly pass rate, "NSK" the design of anti-indentation
2, wounds tone (fretting wear)
Background: motor transport air-conditioning plant noise check noise is found
Features: Continuous issued sound rattling ... "
Reason: Because bumps during transport vibration, bearing steel ball and rolling fretting wear caused sound
Countermeasures: improved packaging and transportation, the fretting wear grease to improve the pass rate.
3, foreign body tone
Background: The noise in the motor assembly, noise check
Features: intermittent issue "snapped snapped Mile Mile ......" the voice of
Reasons: foreign matter into the bearing internal
Countermeasures: improve the cleanliness of the assembly line, rotor and bearing
4, the holder tone
Background: The noise in the motor assembly, noise check
Features: continuous or intermittent issue "grumble grumble Mile Mile ......" the voice
Reasons: to keep the ball collision with friction caused by the noise
Solution: keep the device tone retainer grease

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Next: How to clear the oil bearing

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