GEA Bock FK30 - Manual (Page 12)

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4 | Compressor assembly
4.3 V-belt drive
4.4 Main bearing load
4.5 Installation of electromagnetic clutch assembly
ATTENTION! Inappropriately designed belt drives, especially belt knocking
or excessive tensioning forces can cause compressor damage!
Make sure that the drive belt is designed correctly, e.g. by using
tensioners and selecting the belt profile and the belt length.
To prevent the belt drive overloading the compressor main bearing,
ensure that:
The force applied at the force engagement force by the belt
tension (see Fig. 10) must not exceed F
max
= 2750 N.
If the force engagement point shifts forwards (see Fig.10, small
point), the force F
max
reduces as per the following formula:
F
max zul.
= 245 kNmm
(90 mm + L
1
[mm])
The following description applies for an electromagnetic clutch secured to a shaft.
To absorb the magnetic field of the electromagnetic clutch, the front bearing flange has a
snug fit Ø 95 f7 (see Fig. 11).
For the installation push the magnetic field on snugly and fasten with 2 cheese head screws
M6 x 16 (see Fig. 12). Screw tightening torque = 15 Nm.
Further assembly of the electromagnetic clutch according to the clutch manufacturer.
Bearing flange, front
Magnetic field
Fig. 12
F
max
= 2750 N
(M
bmax
= 245 kNmm)
F
max
L
1 (mm)
Fig. 10
95 f7 Fig. 11