Description Of Components - Boss Infinity Operator, Maintenance And Parts Manual

COMPRESSOR ASSEMBLY
The BOSS INDUSTRIES hydraulic drive compressor assembly is a positive displacement, oil
flooded, rotary screw type unit employing one stage of compression to achieve the desired
pressure. Components include a housing (stator), two screws (rotors), bearings, and bearing
supports. Power from the hydraulic motor shaft is transferred to the male rotor through a drive
coupling. The female rotor is driven by the male rotor. There are five lobes on the male rotor
while the female rotor has six roots.
PRINCIPLES OF OPERATION
In operation, two helical grooved rotors mesh to compress air. Inlet air is trapped as the male
lobes roll down the female grooves, pushing trapped air along, compressing it until it reaches the
discharge port in the end of the stator and delivers smooth-flowing, pulse-free air to the receiver.
During the compression cycle, oil is injected into the compressor and serves these purposes:
1. Lubricates the rotating parts and bearings.
2. Serves as a cooling agent for the compressed air.
3. Seals the running clearances.
LUBRICATION SYSTEM
Oil from the compressor at discharge pressure, is directed into its integral housing, through the
thermal valve and filter, and then out of the integral housing to the oil cooling system, and then back
to the side of the compressor stator, where it is injected into the compressor. At the same time oil
is directed internally to the bearings and shaft seal of the compressor.
OIL SUMP
Compressed, oil-laden air enters the sump from the compressor. As the oil-laden air enters the
sump, most of the oil is separated from the air as it passes through a series of baffles and diffusion
plates. The oil accumulates at the bottom of the sump for recirculation. However, some small
droplets of oil remain suspended in the air and are passed on to the Coalescer.

DESCRIPTION OF COMPONENTS

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