Vanair 050518, Руководство по эксплуатации и список запасных частей

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SECTION 2: DESCRIPTION AIR N ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
PAGE - 22 090012-OP_r0
and eliminates the need for a separate air reservoir.
Internal porting also lubricates the bearings and seals by
using pressure differentials.
The oil has three primary functions: coolant, sealant,
lubricant. The oil carries the heat associated with
compressing air to an air-to-oil heat exchanger. It also
seals the clearances between the rotors and the stator
housing, as well as between the rotors themselves.
Lastly, the oil lubricates the rotors and the bearings and
seal, allowing one rotor to drive the other, which is an
idler.
The rotors are mounted inside the main casting and
consist of a male and female rotor supported with low-
friction bearings sized for a long, useful life.
2.2.2 ELECTRONIC AIR INLET VALVE
See Figure 2-3 . The electronically-actuated air inlet
valve is a piston-type valve located directly on top of the
compressor assembly, beneath the air inlet filter. On
initial start-up, the solenoid is energized and the inlet
valve opens due to pilot air being passed through the
solenoid actuated valve. When operating pressure is
reached, the pressure switch (
Figure 2-6 ) de-activates
the solenoid and the inlet valve closes. At the same time,
the compressor pressure will unload to a lower pressure
(typically about 40 psig). Only the compressed air within
the compressor unit will reduce due to the operation of
the minimum pressure/check valve. This reduction in
Figure 2-2: Compressor Unit