9.3. Drive Motor
The rotary blower can be driven by all standard drive sources available on the market.
The rated power of the drive source should be greater than power requirements of blower.
Consult industry standard information for their service factor recommendations. Typical
minimum service factors are:
z
Electric motor: 1.15
z
Belt drive systems: 1.5
z
Direct drive couplings: 1.4
The speed of the drive source must be selected or controlled such that the maximum
permissible rotor speed cannot be exceeded (see chapter 4.1).
Drive system components must:
x
Comply with speed ratings advised by their manufacture;
x
Be balanced to AGMA class 7 or better;
x
Be fitted to the two shafts with line to line up to 0.001” interference (heating of
hubs to facilitate assembly is common practice).
Protect bearings, pulleys, sheave, coupling hub against impact
damage. Do not hammer the components: this may damage the
bearings.
For maximum radial shaft loading
Some axial loading of the drive shaft is permitted, but should be avoided. Static axial loads
during assembly can be fully supported without damage. Dynamic (in operation) axial
loading will, in some cases, decrease bearing life. If a known dynamic axial load is
transmitted by the drive source, consult EURUS BLOWER’S Engineering Department.
All drive system components should have a guard that protects people in the vicinity of the
unit from the exposed rotating components. Be sure that the guard is selected and installed
with regard to all safety regulations, including OSHA CFR 29, 1910.
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