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4 | Compressor assembly
4.3 V-belt drive
4.4 Main bearing load
4.5 Installation of electromagnetic clutch assembly
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 eld of the electromagnetic clutch, the front bearing ange has a
snug t Ø 95 f7 (see Fig. 11).
For the installation push the magnetic eld 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 ange, front
Magnetic eld
Fig. 12
F
max
= 2750 N
(M
bmax
= 245 kNmm)
F
max
L
1
(mm)
Fig. 10
95 f7
Fig. 11
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
tensionersandselectingthebeltproleandthebeltlength.
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