Atlas Copco XRHS 1150 CD4 C3 WUX, Инструкция по эксплуатации

Страница: 14 / 106

- 14 -
Leading particulars
GENERAL DESCRIPTION
The XRHS 527 Cd - XRHS 1150 CD4 is a silenced,
two-stage, oil-injected screw compressor, built for a
nominal effective working pressure of 20 bar
(290 psi).
The XRVS 487 Cd - XRVS 1050 CD4 is a silenced,
two-stage, oil-injected screw compressor, built for a
nominal effective working pressure of 25 bar
(363 psi).
Engine
The compressors are driven by a 6 cilinder in-line
liquid-cooled diesel engine.
The engine’s power is transmitted to the compressor
element through a heavy-duty coupling.
Compressor
The compressor casing houses two screw-type rotors,
mounted on ball and roller bearings. The male rotor,
driven by the engine, drives the female rotor. The
compressor delivers pulsation-free air.
Injected oil is used for sealing, cooling and
lubricating purposes.
Compressor oil system
The oil is boosted by air pressure. The system has no
oil pump.
The oil is removed from the air, in the air/oil vessel at
first by centrifugal force, secondly through the oil
separator element.
The vessel is provided with an oil level indicator.
Regulation
The compressor is provided with a continuous
pneumatic regulating system and a blow-off valve
which is integrated in the unloader assembly. The
valve is closed during operation by air receiver
pressure and opens by air receiver pressure via the
compressor element when the compressor is stopped.
When the air consumption increases, the air receiver
pressure will decrease and vice versa.
This receiver pressure variation is sensed by the
regulating valve which, by means of control air to the
unloader and an electronic engine speed regulator,
matches the air output to the air consumption. The air
receiver pressure is maintained between the pre-
selected working pressure and the corresponding
unloading pressure.