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Noise characteristics and countermeasures of motor bearings
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Scene: After the motor is installed; when noise is viewed; noise is found.
Characteristics: The sound of "咔啦啦......" 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.
Countermeasure: Select the bearing drawn by the indentation; improve the installation qualification rate; “NSK†anti-indentation depiction. 2. Injury 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 "咔啦......" 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; noise is found when noise is observed.
Characteristics: The sound of "啪哩啪哩..." is announced intermittently.
Reason: Foreign matter enters the inside of the bearing.
Countermeasure: Improve the cleanliness of the installation line, rotor and bearing. 4. Persistence of the sound set: after the motor is installed; noise is found when the noise is viewed.
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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