SKF VectoLub VE1B, Installation And Commissioning Manual

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Fig. 3
3.3 Function
When the VE1B unit is switched on, it is sup-
plied with compressed air (5 to 8 bars) and
with lubricant (0,1 to 0,5 bar).
The VE1B unit is fed in lubricant from the
integrated reservoir, capacity 0.3 l, or from
the user’s external reservoir. The lubricant
flows through the base to the volumetric
pneumatic micropumps. The delivery fre-
quency of all micropumps (max. 3 stroke/s)
is adjusted with either a pneumatic pulse
generator or a solenoid valve, which is con-
trolled via a control unit. The flow rate of the
micropump can be adjusted with metering
rings or with a thumb wheel.
The micropump delivers a metered quan-
tity of lubricant, which goes through the in-
ner channel of the base to the coaxial outlet
port.
Compressed air is also supplied to the unit
from the user’s network. In general the air
inlet is controlled with a solenoid valve (here
as option).
The compressed air flows through the
ground plate of the unit and is distributed on
the one hand to each micropump, and on the
other hand to the coaxial outlets to be used
as carrier air. Every outlet has a regulating
valve to adjust the pressure of the carrier air.
The low-pressure carrier air and lubricant
are simultaneously transported via the co-
axial hose to the nozzle. The carrier air is
swirled in the nozzle. As a result, the me-
tered quantity of lubricant is broken down
into microdroplets, which are transported by
the carrier air to the friction point without
causing any mist.
With a correct adjustment of the projec-
tion air, the size of the microdroplets is be-
tween 200 and 600 µm. It is then possible to
get a homogeneous lubricant coating of the
contact surface.
1
2
3
Projection nozzle for VE1B
1
Carrier air
2 Lubricant
3 Turbulence zone
18