Oerlikon RUVAC WA, Installation And Operating Instructions Manual

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Description
27 GA03107_002_A4 - 09/2015 - © Oerlikon Leybold Vacuum
1.1.2 Design
RUVAC Roots pumps can pump gas in the vertical or horizontal direction.
Although the pumping chamber of Roots pumps is free of sealing agents and
lubricants, the two gearwheels of the synchromesh gearing and the bearings
are lubricated with mineral oil (see fig. 1.3). The gearwheels and bearings of
the RUVAC are located in two side chambers which also contain the oil sup-
ply.
These two side chambers are separated from the pumping chamber by the
impeller seals. During operation of the pump, the side chambers are evacuat-
ed via the impeller seals.
The side chambers are linked to each other by two passages. These passag-
es are arranged so that for either horizontal or vertical flow the pressure will
be equalised between the oil supplies.
In both side chambers there are integrated oil pumps to ensure that the bear-
ings and gearwheels receive sufficient lubricant at all recommended speeds.
Fig. 1.3 Longitudinal section of a RUVAC WAU 2001 (vertical flow)
1 Gearwheels 8 Coupling
2 Bearings 9 Motor
3 Impeller seals 10 Drive shaft
4 Intake port 11 Centrifugal disc lubricator
5 Impellers 12 Discharge port
6 Shaft seals 13 Connecting pipes
7 Oiler