Cleaning, maintenance and repairs
114
ZG-
B
BAG0051.5 02.14
12.5
Belt conveyor with automatic belt control
One property of belt conveyors (
Fig. 77
/1) is that
they give way under load on inclines such as on
sloping terrain or if they are loaded on one side
only. The belt conveyor then runs outwards.
One-sided belt conveyor running is prevented by
the automatic belt control in
AMAZONE
bulk
fertiliser spreaders
ZG-B
.
The conveyor belt is tensioned in the floor belt
with automatic belt control between the drive
drum
(
Fig. 77
/2) and the pulley (
Fig. 77
/3).
While the drive drum is secured rigidly in the
floor belt, the pulley can turn around the swivel
axle (
Fig. 77
/4). The belt conveyor is also guided
between two control rollers (
Fig. 77
/5), which are
connected to the pulley by a control frame (
Fig.
77
/6).
If the belt conveyor runs outwards due to a one-
sided load, the control rollers follow this move-
ment. Consequently, this causes the pulley to
turn around the swivel axle. As a result, the dis-
tance between the pulley and the drive drum
increases on the side toward which the belt con-
veyor is moving.
The larger distance causes the belt conveyor to
return to the middle and continue to settle down
in the middle.
Fig. 77
Tensioning the belt conveyor:
The belt conveyor is tensioned with pretension in
the floor belt for stable, even belt movement. If
the belt conveyor runs unevenly in any circum-
stance, the belt conveyor should be retensioned
on both sides as described below:
1. Loosen the rear lock nuts on both sides
when viewed in the direction of travel (see
arrow) (Fig. 78/1) by turning them anti-
clockwise.
2. Turn the nuts on both sides evenly to the
left when viewed in the direction of travel
(see arrow) (Fig. 78/2).
3. Tighten the lock nuts.
The adjustment travel of the nuts (Fig.
78/2) must be equal on both sides of
the floor belt. Do not turn either nut
(Fig. 78/2) more than a ½ spanner
turn. Tighten the lock nuts and check
whether the belt conveyor is driven
evenly again.
Fig. 78