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Common Abnormalities of Bearings

Common Abnormalities of Bearings

 

Common Abnormalities of Bearings Introduction:

Common abnormalities of bearings mainly include noise problems, abnormal temperature rise, serious vibration, excessive lubricant leakage discoloration and so on.

Noise Problems – Most Typical Abnormalities of Bearings:

Noise problem mainly include loud metal noise, regular noise, irregular noise.

Loud Metal Noise:

Reason 1: Abnormal load
Countermeasures: Correct the fit, study the bearing clearance, and correct the position of the housing shoulder.
Reason 2: Inappropriate installation
Countermeasures: Machining accuracy of shaft and housing, improve installation accuracy and installation method.
Reason 3: Insufficient or unsuitable lubricant
Countermeasure: Replenish lubricant and select appropriate lubricant.
Reason 4: The rotating parts are in contact
Countermeasures: Modify the contact part of the curved seal.

Regular Noise:

Reason 1: Indentation, corrosion or scars on the rolling surface caused by foreign matter.
Countermeasures: Replace the bearing, clean the relevant parts, improve the sealing device, and use a clean lubricant.
Reason 2: Surface deformation (after steel carburization)
Countermeasure: Replace the bearing, pay attention to its use.
Reason 3: The raceway surface is peeled off,
Countermeasure: Replace the bearing

Irregular Noise:

Reason 1: The clearance is too large
Countermeasures: Re-study bearing clearance, and modify the preload.
Reason 2: Foreign body intrusion
Countermeasures: Replace the bearings, clean the relevant parts, improve the sealing device, and use clean lubricants.
Reason 3: Spherical surface injury, peeling
Countermeasure: Replace the bearing

surface injury

surface injury

Abnormal Temperature Rise:

Reason 1: Too much lubricant,
Countermeasure: Reduce lubricant, use appropriate amount, choose harder grease.
Reason 2: Insufficient or unsuitable lubricant
Countermeasure: Replenish lubricant and select appropriate lubricant.
Reason 3: Abnormal load,
Countermeasures: Modify the fit, study the clearance of the bearing, adjust the preload, and modify the position of the shoulder of the housing.
Reason 4: Inappropriate installation
Countermeasures: Improve machining accuracy, installation accuracy and installation method of the shaft and housing.
Reason 5: Creep of the mating surface, excessive friction of the sealing device
Countermeasures: Replace the bearing, modify the shaft and housing, and change the sealing form

Serious Vibration (bounce of shaft):

Reason 1: Surface deformation(after steel carburization)
Countermeasure: Pay attention to the bearing replacement operation.
Reason 2: Peeling
Countermeasure: Replace the bearing.
Reason 3: Poor installation
Countermeasures: Modify the right angle of the shaft, the housing shoulder, and the right angle of the gasket side.
Reason 4: Foreign boby intrusion
Countermeasures: Replace the bearing, clean the parts, improve the sealing device, etc.

Excessive Lubricant Leakage Discoloration:

Reasons: Excessive lubricant, foreign body intrusion, abrasion powder produces foreign matter, etc.
Countermeasures: Use lubricant in an appropriate amount, study the replacement of lubricants and bearings, and clean the bearing housing.

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