Motor bearing noise solution - Solutions - Huaqiang Electronic Network

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1, the holder sounds "唏哩唏哩..."
Analysis of the cause: The vibration and collision of the retainer and the rolling element are generated regardless of the type of grease, and it is more likely to occur when the torque, load or radial clearance is large.
Solution: A, improve the retainer fine. B. Use a bearing with a small clearance or apply a preload to the bearing. C. Reduce the torque load and reduce the installation error. D, choose good grease.
2, continuous beep "å—¡å—¡..."
Analysis of the cause: The motor is running without load and emits a sound similar to a buzzer, and the motor has an abnormal axial vibration, and there is a "beep" sound when it is turned on or off.
Specific characteristics: The lubrication condition is not good. In winter, the motors with ball bearings at both ends are often used, mainly because of the unstable vibration caused by the axial vibration when the shaft alignment performance is not good.
Solution: A, use grease with good lubrication performance. B. Add preload to reduce installation error. C. Use bearings with small radial clearance. D. Improve the rigidity of the motor bearing housing. E. Strengthen the alignment of the bearing. Note: The fifth point of prayer is the fundamental improvement effect, using 02 small groove curvature, 01 large groove curvature.
3, the cause of paint rust analysis: due to the motor bearing shell paint oil after drying, the chemical components volatilized to corrode the end face, outer groove and channel of the bearing, so that the channel is corroded after the abnormal sound.
Specific features: After the corrosion, the bearing surface rust is more serious than the first side. Solution: A. Install the rotor, casing, air-drying or drying. B. Reduce the motor temperature. C. Choose the paint type. D. Improve the ambient temperature of the motor bearing placement. E. With suitable oils and fats, grease can cause corrosion, and silicone oil and mineral oil are the most likely to cause. F, using vacuum dipping process.
4, impurity sound cause analysis: caused by the cleanliness of the bearing or grease, issued an irregular abnormal sound.
Specific characteristics: the sound is occasionally absent, there is no rule when the time is big, and there are many rules on the high-speed motor.
Solution: A, choose good grease. B. Improve the cleanliness before grease injection. C. Strengthen the sealing performance of the bearing. D. Improve the cleanliness of the installation environment.
5, high frequency, vibration sound "å“’å“’..."
Specific characteristics: The sound frequency varies with the bearing speed, and the surface waviness of the part is the main cause of noise.
Solution: A. Improve the quality of the bearing rolling to the surface and reduce the waviness amplitude. B. Reduce bruises. C. 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 housing.
6. Specific characteristics of temperature rise: After the bearing is running, the temperature is beyond the required range.
Analysis of the cause: A, too much grease, the resistance of the lubricant increases. B. If the clearance is too small, the internal load is too large. C, installation error. D. Sealing equipment friction. E, the crawling of the bearing.
Solution: A, choose the right grease, the amount is appropriate. B. Correct the clearance preload and coordination, check the operation of the free end bearing. C. Improve the accuracy of the bearing housing and the installation method.
7. The bearing feels bad. Specific characteristics: When the rotor is rotated by hand, the inside of the bearing feels the impurity and blockage.
Analysis of the cause: A, the clearance is too large. B. The inner diameter and the shaft are not properly matched. C, channel damage.
Solution: A, the clearance should be as small as possible. B. Selection of tolerance zone. C. Improve accuracy and reduce damage to the channel. D, grease selection.