1, Electric motor bearings retainer sound
Analysis of reasons: It is caused by the vibration and collision of the retainer and the rolling element,no matter what kind of grease is used, it may produce,support moments, a large load or when the radial clearance is more likely to occur.
Solution A, improve the retainer;B, select a bearing with a small clearance or apply a preload to the bearing;C, to reduce the torque load, reduce installation errors;D, choose a good grease.
2.Electric motor bearings continuous buzzer :
Cause Analysis: Motor issued a similar no-load operation is the same as the buzzer sounds,in addition, abnormal axial vibration of the motor occurs,there is a "click" sound when you turn it on or off.
Solution: A. Use grease with good lubrication properties;B, plus a pre-load to reduce the installation error;C. Select bearings with small radial clearance;D, improve the rigidity of the motor bearing seat;E. Strengthen the alignment of the bearing.
3,Electric motor bearings bearing feel bad:
Specific features: When holding the bearing to rotate the rotor,feel the impurities and hindrance in the bearing.
Analysis of reasons: A, excessive clearance;B. Improper fit of inner diameter and shaft;C, channel damage.
Solution: A, The gap is as small as possible.;B. Selection of tolerance zone;C, improve accuracy, reduce the damage of the channel;D, grease selection.
4, Electric motor bearings the temperature becomes higher:
Specific features: After the bearing is running,temperature exceeds the required range.
Analysis of reasons: A. Too much grease, lubricant resistance increases;B. The internal clearance is too large due to excessive clearance;C, installation error;D, friction of sealing equipment
Solution: A, the correct choice of oil, the appropriate amount;B. Correct the clearance preload and coordination to check the free end bearing operation;C. Improve bearing housing accuracy and installation methods;D, improve the sealing form.
5, Electric motor bearings paint rust:
Analysis of reasons: Because the motor bearing housing Paints dry,the chemical components that evaporate corrode the bearing surfaces, outer grooves and channels.the abnormal sound that occurs after the channel is corroded.
Solution: A, the rotor housing, after drying or drying assembly;B, reduce the motor temperature;C, choose to adapt to the paint model;D. Improve the ambient temperature of motor bearings;E. Less oil and grease cause less corrosion, and silicone oil and mineral oil are most likely to cause corrosion.F, vacuum impregnation process.
6,Electric motor bearings high frequency, vibration sound:
Specific features: The frequency of sound changes with the speed of the bearing,part surface waviness is the main cause of noise.
Solution: A. Improve the surface quality of the bearing raceway and reduce the waviness amplitude;B. Reduce bruising;C, modified with clearance and preload,check the operation of the free end bearing,improve the accuracy of shaft and housing mounting methods.
7, Electric motor bearings impurity sounds:
Analysis of reasons: Caused by the cleanliness of bearings or grease,produce an irregular abnormal sound.
Solution: A, choose a good grease;B. Improve the cleanliness before the injection of fat;C. Strengthen the sealing performance of the bearing;D. Improve the cleanliness of the installation environment.
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