Louisville CD-1261, Руководство пользователя

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Installation, Operation & Maintenance Manual
IM-995
17
Fan Bearing Maintenance
(refer to safety section)
Proper lubrication of the fan drive bearings helps assure maximum bearing life. All fans are equipped with decals indicating the
recommended relubrication intervals for normal operating conditions.
Refer to the Bearing Installation section for the lubrication
schedules for ball bearings, solid pillowblock spherical roller bearings and split pillowblock spherical roller bearings. Note that
all speeds shown do not apply to all shaft sizes in that group. Consult the factory if in doubt of maximum speed for a particular
bearing. Note that every installation is different and the frequency of relubrication should be adjusted accordingly.
Use 1/2 to 1/3 of the listed lubrication interval for high moisture applications. For vertical shaft mounts or dirty conditions use 1/2
the lubrication schedule.
Observation of the conditions of the grease expelled from unit ball or roller bearings at the time of relubrication is the best guide
as to whether regreasing intervals and amount of grease added should be altered. Spherical roller bearings with split pillowblock
housings should not be lubricated until grease purges or overheating may result. Follow the lubrication interval and amount
noted in the Bearing Installation section. Spherical roller bearings with split pillowblock housings should be serviced once per
year. Remove cap, clean out old grease and replace by filling the bottom half of the housing 1/3 full.
Greases are made with different bases. There are base greases, lithium base, sodium base, polyurea, etc. Avoid mixing greases
with different bases. They could be incompatible and result in rapid deterioration or breakdown of the grease. The lubrication
sticker identifies a list of acceptable lubricants. All bearings are filled with a lithium complex grease before leaving the factory.
When the fans are started, the bearings may discharge excess grease through the labrinth seals for a short period of time. Do
not replace the initial discharge because leakage will cease when the excess grease has worked out. Sometimes the bearings
have a tendency to run hotter during this period. This is no reason for alarm unless it lasts over 48 hours or temperatures exceed
200°F. When relubricating, use a sufficient amount of grease to purge the seals. Rotate bearings by hand during relubrication. If
extended lubrication lines are fitted, lubricate the bearings while the fan is operating if it is safe to do so.
Wheel and Shaft Maintenance
(refer to safety section)
Periodically inspect the shaft and wheel for dirt buildup, corrosion and signs of excess stress or fatigue. Clean the components. If
the wheel is removed for any reason, make sure that it is securely attached to the shaft before restarting the fan.
Structural Maintenance
(refer to safety section)
All structural components or devices used to support or attach the fan to a structure should be checked at regular intervals.
Vibration isolators, bolts, foundations, etc., are all subject to failure from corrosion, erosion and other causes. Improper mounting
can lead to poor operation characteristics or fan fatigue and failure. Check metallic components for corrosion, cracks or other
signs of stress. Concrete should be checked to insure the structural integrity of the foundation.
Duct Connections
(refer to safety section)
The fan support structure is normally not designed to carry
loads imposed by the weight of ducts, silencers, stacks,
etc. Supporting these loads on the fan can cause housing
distortion and may cause performance or vibration problems.
Use of flexible connections is recommended for all fans and
imperative when using vibration isolation or handling high
temperature gases.
Centrifugal Fan with
Vibration Isolation & Flexible
Duct Connectors