Cause analysis:

It is caused by the vibration and collision between the retainer and the rolling elements, regardless of the type of grease, it may be generated under torque, load or diameter It is more likely to occur when the clearance is large.

Solution:

A. Improve the precision of the cage;

B. Select the bearing with small clearance or apply pressure to the bearing. Preload;

C. Reduce moment load and installation error;

D. Select good grease.

Cause analysis:

The motor makes a beep-like sound when running without load, and the motor has an abnormal axial direction Vibration, 'buzz' sound when turning on or off.

Specific features:

The lubrication state is not good. In winter, there are many motors with ball bearings at both ends, mainly when the shaft alignment performance is not good. , an unstable vibration produced under the influence of axial vibration.

Solution:

A. Use grease with good lubricating performance;

B. Add preload to reduce installation errors;

C, select bearings with small radial clearance;

D, improve the rigidity of the motor bearing seat;

E, strengthen the self-alignment of the bearing.

Note: The fifth point plays a fundamental improvement role, using 02 minor groove curvature and 01 major groove curvature.

Cause analysis:

Due to the motor bearing casing drying after paint, the volatilized chemical components corrode the end face, outer groove and groove of the bearing The abnormal sound that occurs after the channel is corroded.

Specific features:

The rust on the bearing surface is more serious than the first surface after being corroded.

Solution:

A. Assemble the rotor, casing, dry or dry;

B. Lower the Motor temperature;

C, select the model with suitable paint;

D, improve the ambient temperature of the motor bearing placement;

E, use suitable grease, grease Causes less rust, silicone oil and mineral oil are most likely to cause;

F, using vacuum dipping process.

Cause analysis:

It is caused by the cleanliness of the bearing or grease.

It is irritating

The sound is occasional, and there are no rules when it is big or small, and it occurs frequently on high-speed motors.

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

Specific features:

The sound frequency varies with the bearing speed, and the surface waviness of the parts is the main cause of the noise.

Solution:

A. Improve the surface processing quality of the bearing raceway and reduce the waviness amplitude;

B. Reduce the Bump;

C. Correct the clearance, pre-tightening force and fit, check the operation of the free end bearing, and improve the precision installation method of the shaft and the bearing seat.

Specific features:

After the bearing is running, the temperature exceeds the required range.

Cause analysis:

A, too much grease, the resistance of the lubricant increases;

B, excessive clearance Small causes excessive internal load;

C, safety error;

D, friction of sealing equipment;

E, bearing creep.

Solution:

A. Choose the correct grease and use the appropriate amount;

B. Correct the clearance preload and Cooperate, check the operation of the free end bearing;

C, improve the bearing seat accuracy and installation method;

D, improve the sealing form.

Specific features:

When you hold the bearing to rotate the rotor, you will feel impurities and blockage in the bearing.

Reason for pulling out the hook

A, the clearance is too large;

B, the fit of the inner diameter and the shaft is improper;

C, channel damage.

Solution:

A, the clearance should be as small as possible;

B, the selection of the tolerance zone;

C. Improve accuracy and reduce channel damage;

D. Grease selection.