Motor bearing noise characteristics and countermeasures of knowledge - bearing

1, the scars of the sound ( Brinell indentation) Background: after the motor assembly, the examination of the noise, found that noise. . 'The sound. 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. 2, scars, Fretting wear) Background: the motor can be shipped to air conditioning factory inspection found when the noise to noise. 'The sound. 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. 'The sound. 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. 'The sound. Reason: the retainer and the ball friction caused by collision phase noise. Countermeasures: the retainer retainer grease.