Radial Ventilation In Heavily Soiled Atmospheres - Bosch Rexroth MAD Project Planning Manual
Asynchronous housing motors
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Application notes
9.8.2
Radial ventilation in heavily soiled atmospheres
Example application
Bosch Rexroth AG R911295781_Edition 11
If MAD/MAF motors are operated in a heavily soiled atmosphere, clean air for
cooling the motor has to be supplied from outside via a tube or an air duct.
●
In this case, motors with fan cowl and fan shroud (type code option
"SL") has to be selected to allow connection of an air tube.
1
2
①
Air outlet
②
Motor
③
Air duct (not included in the scope of delivery)
④
Air inlet (radial fan not included in the scope of delivery)
⑤
Working area
Fig. 9-7:
Example radial ventilation via fan shroud
The machine manufacturer has to select a suitable radial fan while taking the
machine specification into account.
In general, radial fans for MAD motors are not included in the Rexroth scope
of delivery.
Fan shroud on
MAD...
(for further details, see motor dimension drawing)
100
130
160 ... 225
Tab. 9-6:
Connection diameter of fan shroud
After the ventilation system has been installed, a specific air vol‐
ume flow has to be available at the motor (see data on the mean
air volume flow in the motor data sheet in chapter 4).
For this reason, the installed tube or air duct length and the type
of air supply (straight or bent) has to be taken into account when
selecting the radial fan or when using central ventilation.
●
The machine manufacturer has to calculate the required air
flow rate based on the plant specification.
●
The air duct and the fan tubes are not included in the
Rexroth scope of delivery.
Bosch Rexroth recommends the following manufacturers of powerful radial
fans and connection material, such as air tubes, tube clamps, etc.:
MAD / MAF Asynchronous Housing Motors
3
Diameter for air tube connection
Ø 80 mm
Ø 100 mm
Ø 150 mm
4
5
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