Aksa APG100-6, Инструкция по эксплуатации и техническому обслуживанию

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3.3. Natural Gas Engine
The natural gas engine powering the generating set
(Item 2) has been chosen for Its reliability and the fact
that it has been specifically designed for powering gen-
erating sets. The engne is of the heavy duty industrial
type with 4 stroke and is fitted with all accessories to
provide a reliable power supply. These accessories in-
clude, among others, a cartridge type dry air filter (item
3) and an electronic engine speed governor. The en-
gine cylinder block is cast in one piece cast iron, vertical
cylinders inline overhead valves and camshaft in block.
The cylinder heat is made of special cast iron. The ther-
mally loaded flame plate is efficiently water cooled. The
crankshaft is forged in one piece in a high tensile steel.
Lubrication: forced lubrication via gear pump, special
paper cartridge -type filters, lubricant cooling via heat
exchanger on most versions.
3.4. Engine Electrical System
The engine electrical system is 24 VDC negative
ground/earth. This system includes an electric engine
starter, a battery and a battery charging alternator.
For 24 volts electrical system two batteries are given.
Other types of batteries may be fitted If they were
specified.
3.5. Cooling System
The engine cooling system is water cooled. The water
cooled system is comprised of a radiator (Item 4) a
pusher fen and thermostat. The alternator has its own
internal fan to cool the alternator components.
3.6. Synchronous Alternator
Horizontal axle alternator (synchronous three phase),
on rolling bearings, self-ventilated within the room with
low-loss silicon-sheet stator bundle, electrolytic copper
winding with dass H insulation.
The output electrical power is normally produced by a
screen protected and drip-proof, self-exciting, self reg-
ulating, brushless alternator. (Item 5) Fine tuned to the
output of this generating set. Mounted on top of the
alternator is a sheet steel terminal box (Item 6).
3.7. Coupling
Engine and alternator are firmly joined by a coupling
cone that guarantees the proper assembly coaxiality
Mono-support machines are aiso used a special flexible
disk is used in place of a flexible coupling.
3.8. Base frame
The engine and alternator are coupled together and
mounted on a heavy duty steel base-frame (Item 7).
3.9. Vibration Isolation
The generating set is fitted with vibration isolators
which are designed to reduce engine vibration being
transmitted to the foundation on which the generating
set is mounted. These isolators are fitted between the
engine /alternator feet and the base frame.
3.10. Silencer and Exhaust System
Exhaust gases from the turbocharger are discharged
toward atmosphere through a silencer. These should
be vented as high as possible, and must be prevented
from re-entering the engine via the charge air intake, or
polluting the radiator fins.
It is important to note that the turbocharger nozzles
must be always free of loads. Stainless steel exhaust
compensator(s) is delivered with generator set. Ex-
haust lines of different engines shall not be mixed in
a common stack, but routed separately in individual
ducts, enclosed in a chimney.
Suitable material is carbon steel sheet, and recom-
mended calculation temperature is 475°C. Rain and
condensate permanent draining shall be provided to
prevent water entering the silencer and the engine.
An exhaust silencer is provided loose for installation
with the generating set. The silencer and exhaust sys-
tem reduce the noise emission from the engine and
can direct exhaust system reduce the noise emission
from engine and can direct exhaust gases to safe out-
lets. The exhaust silencer is made of a carbon steel re-
ceiver containing sound attenuator and wave de-phas-
ing system made of perforated steel sheet and heavy
rock wool. It is asbestos-free. The exhaust silencer is
delivered in two configurations with an industrial atten-
uation and residential attenuation.