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Noise characteristics and countermeasures of motor bearings

Source: China Bearing Network Time: 2013-10-23

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1, scar sound (Brinell indentation)
Scene: After the motor is installed; when noise is viewed; noise is found.
Characteristics: The sound of "å’”å•¦å•¦......" was announced one after another.
Cause: When the shaft is pressed into the shaft collar or bearing chamber; Brinell indentation is generated inside the bearing.
Countermeasures: Select the bearing depicted by the indentation; to improve the installation qualification rate; "NSK" anti-indentation depiction.
2, scar sound (friction wear)
Set: The noise was found when the motor was transported to the air-conditioning plant for noise viewing.
Features: The sound of "å’”å•¦......" was announced one after another.
Reason: Because of the fluctuation of the oscillation during transportation; the friction between the steel ball and the tumbling of the bearing causes the sound.
Countermeasures: Improve packaging and transportation methods; use anti-friction wear grease; to improve the pass rate.
3, foreign matter sound set: after the motor is installed; when the noise is checked, it is found to be noisy.
Characteristics: The sound of "å•ªå“©å•ªå“©..." is announced intermittently.
Reason: Foreign matter enters the inside of the bearing.
Countermeasures: Improve the cleanliness of the installation line, rotor and bearings.
4, adhere to the sound of the scene: after the motor is installed; when the noise is seen, there is noise.
Characteristics: The sound of "å½å“©å½å“©..." is announced consecutively or intermittently.
Reason: The noise caused by the conflict between the adherer and the steel ball.
Countermeasure: Select the stick grease that adheres to the sound of the instrument.

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