What are Common Faults and Solutions of Slewing Bearings?

As a key component in mechanical equipment, the slewing bearing may have various faults after long-term operation due to load, improper lubrication or environmental factors. If not handled in time, it may cause unstable operation of the equipment or even serious damage. Therefore, it is crucial to understand the common faults of the slewing bearing and their solutions for equipment maintenance.

I. Common types of failures and causes of slewing bearings

Poor rotation or jamming

Possible causes:

Foreign matter enters the bearing, causing the rolling element to be blocked

Insufficient lubrication or expired grease deterioration

Overload operation causes damage to the raceway

Improper equipment installation causes uneven bearing force

Abnormal noise (abnormal sound)

Possible causes:

Severe wear of the raceway or rolling element

Insufficient lubrication or grease drying

Loose bolts cause friction between the slewing bearing and the mounting surface

Excessive vibration during operation

Possible causes:

Loose or damaged rolling element inside the slewing bearing

Uneven mounting surface causes uneven force

Equipment load exceeds the design range, causing deformation of the slewing bearing

Abnormal wear of the slewing bearing raceway

Possible causes:

Excessive load or uneven force causes local damage to the raceway

Failure to replace the grease for a long time causes friction between the rolling element and the raceway Increased friction

The equipment has been running in a harsh environment for a long time, such as high temperature, dust or moisture

Loose or broken bolts

Possible reasons:

The equipment vibrates too much, causing the bolts to loosen

The bolts were not tightened according to the specified torque during installation

The equipment has been overloaded for a long time, causing excessive force on the bolts

II. Solutions to slewing bearing failures

Solutions to poor rotation or jamming

Disassemble the slewing bearing, clean the raceway and rolling elements, and ensure that there are no foreign objects inside

Add or replace the appropriate grease and ensure uniform lubrication

Check whether the equipment is overloaded and reduce the load if necessary

Readjust the installation surface to ensure that the slewing bearing is evenly stressed

Solutions to abnormal noise

Check whether the rolling elements and raceways are severely worn. If damaged, replace the slewing bearing

Add grease regularly and ensure that a suitable lubricant is used

Re-tighten the bolts to prevent abnormal friction caused by looseness Common

Solutions to excessive vibration during operation

Reinstall the slewing bearing to ensure that the installation surface is flat to avoid stress concentration

Check the equipment load to avoid overload operation

If the rolling element is found to be loose or damaged, the slewing bearing should be replaced in time

Solutions to abnormal wear of the raceway

Monitor the load conditions to avoid long-term overload operation

Ensure that the lubrication of the slewing bearing is in good condition and replace the grease regularly

For harsh environments, take protective measures such as installing sealing devices or selecting slewing bearings made of corrosion-resistant materials

Solutions to loose or broken bolts

Use a torque wrench to tighten the bolts to the specified torque to ensure uniform force

Select high-strength bolts to increase the tensile strength of the bolts

After the equipment has been running for a period of time, check the bolt status regularly to prevent loosening

III. How to prevent slewing bearing failures

In order to reduce the occurrence of slewing bearing failures, in addition to timely In addition to troubleshooting and repair, the following preventive measures should be taken:

Regular maintenance and care

Establish a maintenance plan for the slewing bearing, and regularly check the lubrication, bolt tightening and wear conditions

Ensure that the equipment is in good working condition for a long time

Proper installation and commissioning

Ensure that the installation surface is flat to avoid uneven force on the slewing bearing

Use standard methods to tighten the bolts to avoid bearing damage due to improper installation

Choose a suitable slewing bearing model

Choose a suitable slewing bearing according to the load conditions of the equipment to avoid shortening the service life due to improper selection

Use high-quality lubricating grease

Choose grease suitable for the slewing bearing to ensure long-term lubrication effect

Regularly check the lubrication conditions to prevent wear due to lack of lubrication

IV. Summary

Common faults of slewing bearings include poor rotation, abnormal noise, excessive vibration, raceway wear and loose bolts. Correctly identifying the cause of the fault and taking effective solutions can improve the operating efficiency of the equipment and extend the service life of the slewing bearing. Through regular maintenance, correct installation and reasonable lubrication, the failure rate can be effectively reduced and the stable operation of the slewing bearing can be ensured.