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5. Operation
5.1 Operation, Maintenance and Inspection
After starting to operate the blower, perform the maintenance and inspection regularly. If daily
inspection is performed on the following items from the beginning of the operation and the results
are recorded, abnormalities can be detected early to prevent problems. During the maintenance
and inspection, an experienced worker or trained worker should secure the safety. Inspect the
motor based on the operating instructions of the motor.
Inspection item
Recommended inspection cycle
Inspection contents
3 months 6 months
12 months
Co
ndit
io
n in
spect
ion
Abnormal
noise
Blower
■
□
□
Check for abnormal noise due to rattles.
Check for metal contact noise.
Check for other noise considered to be
abnormal.
Motor
■
□
□
Check the grease.
Check for loose bolts.
Check the bearings for abnormal noise.
Vibration
■
□
□
Check the vibration value and any
changes to it.
Temperature
■
□
□
Check the temperature near the bearing
and any changes to it.
Electrical
section
□
■
□
Check the current value and voltage
value, and any changes to them.
Co
mp
on
ent
insp
ecti
on
V-belt
■
□
□
Check the tension.
Check for wear or cracks.
Pulley
□
□
■
Check for wear or cracks.
Coupling
Rubber bushing
□
■
□
Check for hardening.
Check for wear or cracks.
Anti-vibration
rubber
□
■
□
Check for hardening.
Check for wear or cracks.
Shaft seal
□
□
■
Check for cracks or damage.
Packing
□
□
■
Check for damage or hardening.
5.1.1 Abnormal noise
If an abnormal noise is heard, immediately stop the operation to perform inspection.
Possible types and causes of abnormal noise are as follows:
•
Bearing sound
Abnormal lubricating oil (shortage/deterioration of lubricating oil, mixture of foreign materials,
deterioration due to injection of different type of oil)
Abnormality and lifetime of bearing
•
Contact sound
Deformation/damage of Impeller/casing
Intake of foreign materials
Rattling due to looseness of bolts
•
Chattering noise
See “Vibration” in the following section.
Pulsing sound (unstable fluid sound)
Excessively throttled air flow
Excessively large resistance of the device
