Motor bearing noise characteristics and countermeasures of knowledge - bearing
1, the scars of the sound (
Background: after the motor assembly, the examination of the noise, found that noise.
Reason: to press the shaft into axle shaft collar or bearing housing, bearing internal brinell creasing.
Countermeasures: the resistance to creasing bearing design, in order to improve the qualified rate of assembly, 'NSK' indentation resistance design.
Background: the motor can be shipped to air conditioning factory inspection found when the noise to noise.
Reason: due to transportation vibration of turbulence in, fretting wear between the ball and rolling bearing happen cause voice.
Countermeasures: improve the packaging and transportation mode, micro wear resistant grease, in order to improve the qualified rate.
3, foreign bodies, sound background: after the motor assembly, found that the noise when the examination of the noise.
Reason: the foreign body into the inside of the bearing.
Countermeasures: improve the assembly line, the purity of the rotor and bearing.
4, maintain sound background: after the motor assembly, found that the noise when the examination of the noise.
Reason: the retainer and the ball friction caused by collision phase noise.
Countermeasures: the retainer retainer grease.