Parker EX Series, Техническое руководство

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87
– Pvd3665_Gb_Ex_August 2022
3.5. Shaft Loads
3.5.1. Vibration resistance to shaft end
Frequency domain :10 to 55 Hz according to EN 60068 -2-6
Vibration resistance to the shaft end :
- radial 3 g
- axial 1 g
3.5.2. Maximum load acceptable on the shaft
Warning :
The values written in the table are given for a load placed on the
middle of the shaft like the picture below.
Warning :
Due to the small ATEX airgap requirements between the shaft and the
front flange, the radial loads on the shaft are lower than standard NX
motors.
The ATEX airgap requirements depend on the volume of the motor and
can lead to lower radial loads for bigger motors.
The bearing arrangement is made with 2 ball bearings (one on the shaft
end + another on the rear). The rear bearing is blocked in axial translation
and the front one is free in translation to avoid any stress from the shaft
thermal expansion during the running.
So, it is important not to block in translation the shaft expansion by any
extra bearing or similar device.
L
L/2
F