SKF LUBRILEAN Vario, Руководство по эксплуатации

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Structure and function Page 10
EN
8 Structure and function
Fig. 1 shows the structure of the MQL system
L
UBRI
L
EAN
®
Vario.
8.1 Principle of minimal quantity
lubrication (MQL)
Minimal quantity lubrication is based on a
principle of loss or consumption. In other words,
the lubrication that is applied is nearly
completely used up during processing, making
a processing of the lubricant in the circulation
unnecessary. The actual task of lubrication at
the point of friction between the tool and the
swarf running in the groove is provided by a
finely dispersed drop of lubricant in the stream
of air or aerosol.
The minimal quantity lubrication principle allows
the smallest quantity of lubrication to be used to
achieve an effective lubrication of machining
processes. The cumbersome cleaning and
disposal of large quantities of lubricants and
cooling lubricants is unnecessary or reduced to
a minimum.
8.2 Aerosol mechanism of action
The SKF MQL system L
UBRI
L
EAN
®
Vario
described here with respect to the size and
distribution of the lubricant droplet generates a
very homogenous aerosol with a very small
droplet size. Due to the small size, the lubricant
droplets are very light, which therefore requires
a very low inertia. These small lubricant droplets
can be transported long distances through
conduits without their settling due to inertia. In
addition, the transport of the aerosol poses via
rotating spindles and tools – even at very high
rotational speeds – also poses no problem for
the MQL system because the centrifugal force
on the lubricant drops is very low.
Fig. 1. Structure L
UBRI
L
EAN
®
Vario
(Schematic illustration, subject to technical
changes)
1 Aerosol
outlets (

12 mm)
2 Safety valve (12 bar)
3 Lubricant filling hole with
back-pressure
valve
4 Air supply unit
5 Main air valve with pressurised
air connection (NG 7-8 mm)
6 Oil drain plug
7 Pressure control valve main air
8 Pressure control valve secondary air
9 Fill level display
10 Float flowmeter
11 Adjusting screw oil valve
12 Aerosol container
13 Pressure gauge display
secondary air pressure
14 Pressure gauge display primary
pressure of compressed air supply
15 Rotary knob for pressure regulation
16 Float (oil flow rate display)
17 Connector level switch
(Fig. 2, Fig. 3) (optional)