Prebena SK-15-10, Руководство пользователя

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PREBENA
Wilfried Bornemann GmbH & Co. KG
BEFESTIGUNGSTECHNIK
– FASTENING TECHNOLOGY
24
8.3.6 Replacement of the belt
When replacing the belt, the following is required:
a) Remove the right cover of the compressor housing and the protective device.
b) Loosen the four screws of the motor platform.
c) Reduce the belt tension by moving the motor platform in the direction of screw
conveyor unit
d) Remove the belt.
e) Clean the grooves of the pulley with a cleaning cloth and install the new belt.
f) Now increase the tension by moving the electric motor platform away from the
worm screw. Ensure that the belt tension and deflectionare adjusted as shown in
Figure 7 .
g) Tighten the motor platform by tightening the screws firmly.
h) Place the protection device and the cover back on the compressor housing.
8.3.7 Checking the belt tension
The belt tension adjustment is performed in accordance with Point 8.3.6 .
The power of the electric motor is transmitted by means of the contact of the belt with
the pulleys. To ensure normal operation, all contact surfaces must be clean and the
belt must be fully taught and set to the correct tension / deflection.
The belt tension should be checked after assembly and periodically during operation,
especially if the compressor has not been used over a period of at least one week.
The belt deflection should be adapted and adjusted using a dynamometer, a string
and a ruler
(Figure 7).
The power is transmitted via the belt, whereby frictional forces are generated
between the belt and pulleys, transferred from the electric motor to the drive of the
screw assembly. To ensure normal operation, all surfaces of belts and pulleys must
be kept clean and tightened to the correct pressure.
The belt tension must be checked after assembly and periodically during operation,
especially if the compressor has not been used over a period of at least one week.
3 to 5 operating hours after the belt change, check the tension, since the belt has
been subject to intensive expansion during this period, which may lead to a friction-
induced slippage and thus to power loss and damage.
For compressors up to 15 kW: The belt must be tightened and may only yield up to a
maximum of 5-6 mm at an applied force (F) of 30 N
(Figure 7) .