18
PTS 916 Cd
2.7 Cooling and lubricating oil system
Oil from the oil sump (OS) of gear casing (GC) is circulated by an
oil pump (OP), mounted on the front of the gear casing. The pump
is driven from the main drive shaft. The oil is pumped to the cooling
jacket of the MP compressor element (CE
MP
) and to the cooling
jacket of the LP compressor element (CE
LP
) and from there
through the air-cooled oil cooler (OC). From the LP element
cooling jacket the oil passes through oil filter (OF
C
) on gear casing
before entering the LP and MP element oil pipes and ducts to
lubricate the rotor bearings, driving and timing gears. The oil then
flows back to the oil sump.
The gear casing is vented to the atmosphere through a breather pot
assembly.
The bypass valve (BV
OF
) of the oil filter opens when the pressure
drop over the filter is above normal due to clogging of the element.
The oil is then circulated without being filtered. For this reason, it
is imperative to replace the oil filter at regular intervals.
Bypass valve (BV
OS
) opens when the pressure drop over the filter
and lubricating circuit is above normal. The oil is then returned to
the oil sump.
Bypass valve (BV
OC
) opens when the pressure rise over the oil
cooler is above normal. This will happen mainly when starting the
compressor from cold in low ambient temperatures. The bypassing
of the oil cooler will ensure rapid warming of the oil to the normal
working temperature.
A pressure shutdown sensor and a temperature reading sensor (TS)
are comprised in the system.
CE
LP
CE
MP
OC
DP
OC
F1
GC
DP
OS
OG
MP
CE
LP
CE
MP
GC
OS
OP
BV
OS
BV
OC
t
BV
OF
OG
LP
DP
OS
TS
OS
OF
C
COOLING CIRCUIT
LUBRICATING
CIRCUIT
BV
OC
Bypass valve (oil cooler)
BV
OF
Bypass valve (oil filter)
BV
OS
Bypass valve (oil sump)
CE
LP
LP compressor element
CE
MP
MP compressor element
DP
OC
Drain plug (oil cooler)
DP
OS
Drain plug (oil sump)
F
1
Cooling fan 1 (RAD, IC, AC
1
, OC)
GC
Gear casing
OC
Oil cooler
OF
C
Compressor oil filter (with bypass valve)
OG
LP
Oil gallery (LP compressor element)
OG
MP
Oil gallery (MP compressor element)
OP
Oil pump
OS
Oil sump
TS
Temperature sensor
Содержание PTS 916 Cd
Страница 1: ...Instruction Manual for Portable Compressors PTS 916 Cd ...
Страница 2: ......
Страница 57: ...Preliminary 57 Circuit diagrams ...
Страница 72: ......
Страница 73: ......
Страница 74: ...Printed in Belgium 07 2007 Preliminary www atlascopco com ...