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What are the seven common causes of electric motor bearings failures and what are the solutions

254 Published by Jun 06,2018

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.electric motor bearings koyo brand
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.China supply electric motor bearings
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.

Contact: Grace
Email: ntn@llhbearing.com
Skype: 008618668903871
MP/Whatsapp: 008618668903871
Wechat:GraceXu1314

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