Friday, January 2, 2009

Motor Bearings

Maximize Bearing Life Cycle
Mounting and Lubrication

Mounting is one of the critical stages of bearing's life-cycle. If the bearing is installed properly using the correct method and tools, the bearings service life-time will be greatly reduced.

Lubrication is also an important step in the installation procedure. Selecting bearing grease suitable for the compressor application is critical to achieving optimum performance.

Further more, the quantity of correct grease and the lubrication method used can positively influence the service life of the bearings.

Re-Lubrication
When put into operation, the bearings require correct re-lubrication practices to optimise its performance.

Selecting the correct bearing grease and applying the right quantities at correct intervals are essential for achieving the maximum service life of the bearing.
Additionally, the re-lubrication method used can positively contribute to optimising the bearing's service life. Continuous lubrication using automatic lubricators, single or multiple-point, provides more consistent, correct and contamination-free supply than manual re-lubrication methods.
Alignment
After the bearing has been installed in an motor or pump, the set should be aligned. If it is not properly aligned, the misalignment may cause the bearing to suffer additional load, friction and vibration.

These can accelerate fatigue and reduce the bearing, as well as other machine components service life. Increased vibration and friction can greatly increase energy consumption and the risk of premature failures.




Basic Condition Monitoring
During operation, it is important to regularly inspect the condition of the bearing by performing basic condition monitoring, such as temperature, vibration and noise measurements.
These regular inspections will allow the detection of potential problems and help to prevent unexpected compressor break-down.

Consequently the compressor maintenance can be planned to suit the production schedule, thurs, increasing the plant's productivity and efficiency.

Dismounting
At some point in time, the bearing will reach the end of its service life and will have to be replaced. Although the bearing may not be used again, it is extremely important to dismount [dismantle] it correctly so that the service life of the replacement [NEW] bearing is not compromised.

Firstly, the use of proper dismounting methods and tools will help prevent damage to other machine components, such as shaft and housing, which are often re-used.

Secondly, incorrect dismounting techniques can be hazardous to the operator.

Dismounting Tools
Sample of Some of the dismounting hand tools in used!
1. Two-leg version
2. Three-leg version

Source from http://skf.com

No comments: