3 Product description
3.1 Function
The rotary vane pumps of the HenaLine are single-stage, oil-sealed rotary positive displacement pumps
with air cooling and circulatory lubrication. A non-return valve in the vacuum connection closes the in-
take line automatically when the rotary vane pump is switched off and prevents an operating fluid return
flow. The integrated oil mist filter cleans the conveyed gas and prevents the operating fluid mist from
being emitted at the exhaust. The operating fluid collected in the separator is supplied back to the rotary
vane pump. A filter is also installed on the operating fluid separator for cleaning the operating fluid.
Fig. 2:
Operating principle
The pumping system is made up of the housing, the eccentrically mounted rotor, and the centrifugally
sliding vanes, which divide the suction chamber into multiple chambers. The volume of each chamber
changes periodically as the rotor rotates. This causes the gas to be continuously drawn in at the vac-
uum connection and compressed in the suction chamber by the rotation of the rotor until the exhaust
valve opens against the atmospheric pressure and the gas leaves the suction chamber.
14
1
2
3
9
10
11
12
13
4
5
7
8
6
Fig. 3:
Structure of the rotary vane pump
1 Vacuum connection
8
Axial fan with oil/air heat exchanger
2 Exhaust connection
9
Filler screw with manometer
3 Gas ballast valve
10
Operating fluid filter
4 Lifting eye (2x)
11
Sight glass
5 Exhaust filter
12
Drain screw
6 Motor
13
Rubber-metal bumper
7 Motor terminal box
14
Operating fluid separator
3.1.1 Operating fluid
The operating fluid fulfills various tasks in a rotary vane pump:
● lubrication of all moving parts
● filling part of the dead volume under the exhaust valve
● sealing the gap between the inlet and outlet channels.
● sealing the gap between the vanes and working chamber.
● ensuring an optimal temperature balance through heat transfer
Product description
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