The failure is judged by the sound of the spindle motor

Spindle motors make some noise due to rotational friction during operation, but normal spindle noise is relatively quiet and basically no noise. Next, let's talk about the abnormal noise of the spindle motor.

1. Dada sound: The frequency of sound changes depending on the bearing speed, and the swell of the surface of the part is the main cause of noise.

Solution: Improve bearing raceway surface treatment quality, reduce swell amplitude, reduce bumps, change clearance preload and fit, check free end bearing operation, precision mounting of shaft and bearing seats Improve the method.

2. Boom: When the motor is operating with no load, it makes a buzz-like sound, the motor has abnormal axial vibrations, and when the power is turned on and off, it makes a buzz. To do.

Solution: Mainly caused by poor lubrication at both ends and motors with ball bearings in winter. The shaft alignment performance is not good due to unstable vibration that occurs mainly due to the influence of axial vibration.

3. Impurity noise: Irregular abnormal noise is generated due to bearings and high quality cleanliness. It may be silent, loud, or quiet, and occurs frequently on high-speed motors.

Solution: Select the right grease to improve the cleanliness before grease injection, enhance the bearing sealing performance and improve the cleanliness of the installation environment.

4. Pitch and pattern sound: Caused by vibration and collision of retainers and rolling elements, regardless of grease type. It is more likely to occur when torque, load, or radial clearance is high.

Solution: Improve the accuracy of the retainer and choose a bearing with smaller clearance, or preload the bearing to reduce moment load, reduce mounting errors and choose the right grease.

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