TM 5-4310-451-14
1-13. ENGINE.
The engine for this air compressor unit is a Detroit Diesel, six-cylinder, two-cycle engine. For information on
engine technical principles of operation, refer to TM 9-8000.
1-14. AIR COMPRESSOR ASSEMBLY
a.
General.
(1)
The air compressor assembly is a single stage,
positive displacement, flood lubricated type which
provides continuous pulse-free compression.
(2)
Oil is injected into the air compressor and mixes
directly with the air as the rotors turn, compressing the
air.
(3)
The oil flow has three primary functions:
(a)
As a coolant, it controls the rise of air
temperature normally associated with the
heat of compression.
(b)
Seals the leakage paths between the
rotors and stator, and also between the
rotors them- selves.
TYPICAL CROSS-SECTION
(c)
Acts as a lubricating film between the rotors, allowing one rotor to directly drive the other, which acts as an
idler.
(4)
After the air/oil mixture is discharged from the air compressor, the oil is separated from the air. At this time, the air
flows to the service line and the oil is cooled in preparation for reinjection.
TA704679
1-13
