23
1 BLOWER CHARACTERISTICS
1.2 Operating principle
RB-DV series blowers are positive displacement
exhausters comprising two conjugate shaped rotors 2
which rotate inside a figure 8 shaped body 1.
The gas enters the blower at pressure P
1,
below the
atmospheric pressure, and temperature T
1 and
it is
trapped in the volume V.
The compression of entrained air is carried out by the
injection of cold atmospheric air in the volume V through
the nozzles 3.
The capacity is proportional to the speed of rotation and is
almost constant when the operating pressure varies.
P1 inlet absolute pressure
T1 inlet temperature
P2 outlet absolute pressure
T2 outlet temperature
T3 injection air temperature
Fig. 1
1.2 Construction
The body 1 is closed at both ends by covers 5A and 5B in
which the seals 45 and bearings 31, 32 and 33 are located.
The rotors 2 are synchronized by means of a gear with
involute toothed wheels 11A and 11B.
The shafts have labyrinth seals, gas leaks are collected
into special air spaces in the covers and are discharged
into the atmosphere.
Two sumps 12A and 12B are mounted on the covers which
act as oil tanks for the bath lubrication of the bearings and
of the synchronized gear.
Fig. 2
1.3 Nameplate
-Blower type
1) Size
from 45 to 145
2) Version F
Flanged
V Vertical
H Horizontal
SP Without feet
RV Cooled vertical
3) Execution
0001
-S/N
Serial number
-m
3
/h
Capacity
-kW
Power
-dp mbar
Differential pressure
-n RPM
Rotation speed
Note : For a detailed description of the blower materials and all its components see also the catalogue or
consult our technical service.
Type
RB-DV 65 / V
S/N
0105116
exec. 0001
m3/h
1000
kW
37
dp
500
n
1450
mbar
RPM
(3)
(1)
(2)
1
2
33
11B
12B
32
31
12A
5A
5B
25
11A
3
3
2
V
2
1
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