Problem one: buzzing sound
When the motor runs without load, it makes a sound like a buzzer, and the motor vibrates abnormally in the axial direction, and there is a buzzing sound when it is turned on or off.
Solution: It mostly occurs when the lubrication state is not good, and the motor with ball bearings at both ends in winter is mainly an unstable vibration generated under the influence of axial vibration when the shaft alignment performance is not good.
Question 2: Impurity sound
Caused by the bearing or high-quality cleanliness, an irregular abnormal sound is emitted, the sound is sometimes absent, sometimes loud and sometimes small, and it occurs frequently on high-speed motors
Solution: choose good grease, improve the cleanliness before grease injection, strengthen the sealing performance of the bearing, and improve the cleanliness of the installation environment
Question 3: Da Da sound
The sound frequency varies with the bearing speed, and the surface waviness of the parts is the main cause of the noise
Solution: Improve the surface processing quality of the bearing raceway, reduce the waviness amplitude, reduce the bump, correct the clearance preload and fit, check the operation of the free end bearing, and improve the precision installation method of the shaft and the bearing seat.
Question 4: Pattering sound
It is caused by vibration and collision between the cage and the rolling elements, regardless of the type of grease, and is more likely to occur when a moment, load, or large radial clearance is applied.
Solution: Improve the accuracy of the cage, select bearings with small clearance or apply preload to the bearings, reduce moment loads, reduce installation errors, and select good grease.