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4.1
Design and function
4
Separator basics
4.1.6
Power transmission
Bowl spindle
In addition to its primary role in the power
transmission system, the bowl spindle also
serves as:
•
pump for the closing water
•
supply pipe for the closing water
•
lubricator for spindle ball bearings
Closing water is pumped through the hollow
spindle (B) to the discharge mechanism in the
bowl. For this purpose a pump sleeve (b4) is
fitted in the lower end.
The two spindle bearings are lubricated with
oil mist. An oil pump (b3) creates the oil mist,
which is sucked through the upper ball bearing
by a fan (b1). Oil is supplied via an oil filling
device, which also serves as a level indicator.
Two identical ring-shaped rubber buffers (b2)
support the top bearing housing. The buffers
are held in place by a buffer holder and form
channels through which the re circulated oil
passes.
G0112721
Bowl spindle assembly
B. Bowl spindle
b1. Fan
b2. Rubber buffers
b3. Oil pump
b4. Sleeve
Belt drive
The bowl spindle is driven by a flat belt.
Adaptation to 50 or 60 Hz power supply is
made by selecting the motor belt pulley with the
appropriate diameter. A longer belt is needed
for the pulley for 50 Hz.
Correct tension is set by means of a
spring-loaded belt tightener.
G0112821
Bowl spindle assembly
Friction coupling
The friction coupling on the motor pulley
ensures gentle start-up and prevents overload
of the electric motor. Centrifugal force creates a
torque that acts on the pulley through the friction
elements.
G0112911
Friction coupling
28
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