Wolf KG - Maintenance Details; Flat Belt Drive Maintenance; Free Running Fan Impeller Maintenance

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KG TopMaintenance
Free running fan impeller
Observesafetyandemploymentregulations(BSEN50110,IEC364)whencarrying
out repair and maintenance work!
Motor and bearing are maintenance free.
Check the fan for mechanical vibrations in accordance with BS ISO 14694 every 12 months.
The max. permissible vibration severity is 2.8 mm/s (measured on the bearing plate of
the bearing at the impeller end of the motor).
Deposits on the impeller can lead to imbalance and thus to damage (danger of a fatigue
fracture – impeller can break up – danger to life).
Clean the impeller with soapy solution if required.
Fan impeller Motor
Testforces(F)anddeectionvalue(x)fornarrowhighperformancevee-beltsDIN7753
Beltprole Effective diameter
of the small pulley
(mm)
Force F
(N / belt)
SPZ 67 - 95
100 - 140
150 - 200
10 - 19
15 - 20
19 - 27
SPA 100 - 132
140 - 200
224 - 315
20 - 27
28 - 35
35 - 50
SPB 180 - 224
236 - 315
315 - 400
400 - 500
40 - 52
46 - 60
55 - 76
67 - 90
Deectionx(mm)
Axis clearance A (mm)
Flat belt drive
Check the precise parallelism of the fan drive shaft to the motor drive shaft.
Check the precise alignment of the pulleys.
Clean the pulley belt faces thoroughly to remove dirt, oil and grease.
Using a pencil, apply measuring marks to the belt at distances of, for example, 250 mm,
350 mm, 500 mm, 750 mm and 1000 mm.
Prior to the test run, turn the pulleys manually to check the belts run correctly.
Check the belts after a test run lasting 30 to 60 minutes and increase the pretension
(max. 2%) if required.
When using collared/weald pulleys ensure that the belt has no permanent contact with
the collar or weald during operation. This would lead to the destruction of the belt.
Note
Test marks
Test marks
max. +2%
250/350/500
Examples - test mark clearances:
Unstretched 250 mm 350 mm 500 mm 750 mm 1000 mm
Stretched
+ max. 2%
max.
255 mm
max.
357 mm
max.
510 mm
max.
765 mm
max.
1020 mm