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AIR FLOW
Air drawn through the airfilter (AFce) into the
compressor element (CE) is compressed. At the
element outlet, compressed air and oil pass into the air
receiver/oil separator (AR/OS).
The check valve (CV) prevents blow-back of
compressed air when the compressor is stopped. In
the air receiver/oil separator (AR/OS), most of the oil
is removed from the air/oil mixture.
The oil collects in the receiver and on the bottom of
the separator element.
The air leaves the receiver via a minimum pressure
valve (MPV) which prevents the receiver pressure
from dropping below the minimum working pressure,
even when the air outlet valves are open (specified in
section
Limitations
). This ensures adequate oil
injection and prevents oil consumption. The
minimum pressure valve (MPV) also functions as a
check valve.
The system comprises temperature sensors (TS),
pressure sensors (PS) and a working pressure sensor
(WPS).
OIL SYSTEM
The lower part of the air receiver (AR) serves as an oil
tank.
Air pressure forces the oil from the air receiver/oil
separator (AR/OS) through the oil cooler (OC), the oil
filters (OF) and the oil stop valve (OSV) to the
compressor element (CE).
When the compressor is stopped and / or there is no
pressure in the system, the oil stop valve (OSV)
prevents the oil from flowing back into the
compressor element.
The thermostatic by-pass valve (TBV) starts opening
when the oil temperature is 80°C (176°F).
The compressor element has an oil gallery in the
bottom of its casing. The oil for rotor lubrication,
cooling and sealing is injected through holes in the
gallery.
Lubrication of the bearings is ensured by oil injected
into the bearing housings.
The injected oil, mixed with the compressed air,
leaves the compressor element and re-enters the air
receiver, where it is separated from the air as
described in section
Air flow
. The oil that collects on
the bottom of the oil separator element is returned to
the system through a scavenging line (SL), which is
provided with a flow restrictor (FR).
The oil filter by-pass valve opens when the pressure
drop over the filter is above normal because of a
clogged filter. The oil then by-passes the filter
without being filtered. For this reason, the oil filter
must be replaced at regular intervals (see section
Preventive maintenance schedule
).
Reference
Name
OLG
Oil Level Gauge
OS
Oil Separator
OSV
Oil Stop Valve
PS
Pressure Sensor
RPS
Regulating Pressure Sensor
RV
Regulating Valve
SC
Safety Cartridge
SL
Scavenge Line
SV
Safety Valve
TBV
Thermostatic Bypass Valve
TS
Temperature Sensor
TV
Throttle Valve
UA
Unloader Assembly
VH
Vent Hole
VV
Vacuator Valve
WPG
Working Pressure Gauge
WPS
Working Pressure Sensor
Summary of Contents for XAHS 447 Cd S3A APP
Page 2: ......
Page 24: ... 24 SH 03 ENGINE CIRCUIT 1 2 3 5 9 8 7 6 G 4 10 A B C D E F 9822 0963 49 ...
Page 25: ... 25 SH 04 CONTROL MODULE 1 2 3 5 9 8 7 6 4 10 A B C D 9822 0963 49 ...
Page 26: ... 26 SH 05 COMPRESSOR CIRCUIT 1 2 3 5 9 8 7 6 G 4 10 A B C D E F 9822 0963 49 ...
Page 27: ... 27 SH 06 OPTIONAL EQUIPMENT 1 2 3 5 9 8 7 6 G 4 10 A B C D E F 9822 0963 49 ...
Page 28: ... 28 SH 07 OPTIONAL EQUIPMENT 1 2 3 5 9 8 7 6 4 10 A B C D E 9822 0963 49 ...
Page 110: ... 110 Notes ...
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