Bearing is the most rotating equipment must be used in the accessories, bearing damage is also common, then, encountered in the use of peel, burn, crack defects and other problems, how to solve it?

This paper summarizes the 10 common damage problems of bearings, which are practical and for your reference.

 

         1. the stripping

Phenomenon: the running surface is peeled off, and the peeled surface is obviously convex and concave

 

The reason:

 

1) excessive load and improper use

 

2) Poor installation

 

3) Poor accuracy of shaft or bearing box

 

4) Too small clearance

 

5) Foreign body invasion

 

6) Rust occurs

 

7) Hardness decrease caused by abnormal high temperature

 

Measures:

 

1) Re-study the use conditions

 

2) Select bearings again

 

3) Rethink clearance

 

4) Check the machining accuracy of the shaft and bearing box

 

5) Study the design around bearings

 

6) Check the method of installation

 

7) Check lubricant and lubrication method

 

 

 

        2. burns

 

Phenomenon: bearing heat discoloration, and then burn can not rotate

 

The reason:

 

1) Too small clearance (including deformation part clearance)

 

2) insufficient lubrication or improper lubricant

 

3) Too much load (too much preload)

 

4) Roller deflection

 

Measures:

 

1) Set appropriate clearance (increase clearance)

 

2) Check the type of lubricant to ensure the injection amount

 

3) Check the conditions of use

 

4) to prevent positioning errors

 

5) Check the design around the bearing (including bearing heating)

 

6) improve the assembly method of bearings

 

 

 

            3. Crack defects

 

Phenomenon: partially notched and cracked

 

The reason:

 

1) the impact load is too large

 

2) Excessive interference

 

3) There is a large peel

 

4) friction crack

 

5) Poor accuracy of the installation side (too large corner circle)

 

6) Poor use (with copper hammer, stuck into a large foreign body)

 

Measures:

 

1) Check the conditions of use

 

2) Set appropriate interference and check the material

 

3) Improve the installation and use method

 

4) Prevent friction crack (check lubricant)

 

5) Check the design around the bearing

 

 

 

            4. Cage is damaged

 

Phenomena: Rivet loosening or fracture, cage rupture

 

The reason:

 

1) Excessive torque load

 

2) High speed rotation or frequent rotation speed changes

 

3) Poor lubrication

 

4) Imported foreign body

 

5) High vibration

 

6) Poor installation (installation in tilting state)

 

7) Abnormal temperature rise (resin cage)

 

Measures:

 

1) Check the conditions of use

 

2) Check lubrication conditions

 

3) Re-study the cage selection

 

4) Pay attention to the use of bearings

 

5) Study shaft and bearing box rigidity

 

 

 

             5. scratch card injury

 

Phenomena: the surface is rough, accompanied by tiny application; The abrasion between the rim of the ring and the end face of the roller is called stuck

 

The reason:

 

1) Poor lubrication

 

2) Foreign body invasion

 

3) Roller deflection caused by bearing tilt

 

4) The flange surface is broken due to the large axial load

 

5) the surface is rough

 

6) Large sliding of the rolling body

 

Measures:

 

1) to study lubricants, lubrication methods

 

2) Check the conditions of use

 

3) Set the appropriate prepressure

 

4) strengthen the sealing performance

 

5) normal use of bearings

 

 

 

               6. rust corrosion

 

Phenomenon: the surface of local or all rust, a rolling body tooth pitch rust

 

The reason:

 

1) Bad storage condition

 

2) Improper packing

 

3) lack of rust inhibitor

 

4) Intrusion of water and acid solution

 

5) directly hold the bearing by hand

 

Measures:

 

1) to prevent rust in storage

 

2) strengthen the sealing performance

 

3) Check the lubricating oil regularly

 

4) Pay attention to the use of bearings

 

 

 

                  7. abrasion

 

Phenomenon: red rust wear on the mating surface

 

The reason:

 

1) Insufficient interference

 

2) Small bearing rocking Angle

 

3) Insufficient lubrication (or no lubrication)

 

4) Unstable load

 

5) Vibration in transportation

 

Measures:

 

1) Check interference and lubricant coating status

 

2) The inner and outer rings are packed separately during transportation, and prepressure is applied when they cannot be separated

 

3) Choose lubricants again

 

4) Select bearings again

 

 

 

               8. wear and tear

 

Phenomenon: surface wear, resulting in size changes, accompanied by wear, wear marks

 

The reason:

 

1) Foreign body is mixed into lubricant

 

2) Poor lubrication

 

3) Roller deflection

 

Measures:

 

1) Check lubricant and lubrication method

 

2) strengthen the sealing performance

 

3) to prevent positioning errors

 

 

 

               9. the electric erosion

 

Phenomenon: the rolling surface has a crater like a crater, and the further development is a wave plate

 

Cause: The rolling surface is energized

 

Measures: making current bypass valve; Insulation measures should be taken to prevent current from passing through the bearing interior

 

 

 

              10. indentation injury

 

Phenomenon: surface pits and abrasions caused by sticking into a solid foreign body or impact

 

The reason:

 

1) Invasion of solid foreign bodies

 

2) Insert the peel into the card

 

3) the impact caused by poor installation, falling off

 

4) Install in tilting state

 

Measures:

 

1) Improve the installation and use method

 

2) Prevent foreign matter from mixing

 

3) If it is caused by metal sheet, other parts must be checked