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DIESEL ENGINES
Monitoring for diesel engines -
improved sensors from Amot
In 2009, Amot and Enertech entered into an exclusive partnership to provide ASME Code
Section III components to both existing and newly constructed U.S. and Canadian power plants.
AIP looks at some of the design solutions for the control and monitoring of engines & pumps.
Amot’s Model XTS-W+ bearing
condition units have been designed
to monitor the wear condition of
crank train bearings in large diesel
engines as well monitoring the Water in
Oil (WIO) content. As you’d expect, the
water in oil sensor monitors moisture
content in the engine’s lubricating oil.
Amot’s designs are said to offer the
ultimate protection for engines from
catastrophic damage. The sensors are also
said to be effective at reporting storage
long term trends and can be used as a
tool for class surveying.
The units feature simple low cost
installation - there is no drilling of highly
stressed engine components, says Amot,
and provides signals for engine slow down
in case of extreme bearing wear.
The proximity sensors are robust, proven
electronic sensors, which use a low
intensity electromagnetic field to detect
the position of the guide shoes at bottom
dead centre (BDC). The sensors are fixed
to custom designed brackets for different
engine types.
Engine junction boxes fit to the outside
of the engine. These allow cables passing
through the wall of the engine to be
removed for servicing if required. The
Signal Processing Unit is capable of
simultaneously processing signals from up
to 14 proximity sensors, four temperature
sensors and one water in oil sensor.
The Interface Unit houses an
Uninterruptible Power Supply (UPS) and
an 18V DC power supply. In addition, it
provides a means of connecting the alarm
signals to the control and alarm system.
The new generation XTS-W has fully
integrated water-in-oil (WIO) monitoring.
The Display and Monitor
Unit comprises full
application-specific
software, running on a
marine approved PC.
Separate screens [left]
show trends, real-time
measurement of Water
Activity (aw) and Parts
Per Million (ppm).
Alarm levels are
defined by engine
manufacturers. In
How the engine controls work.
addition, full
trend data is
available as
standard
allowing
interrogation of
the system to
determine the
rate of water
contamination.
The use of
proximity
sensing and the availability of signal
post-processing enables real-time wear
trend analysis.
Through analysis of the rate of change of
the bearing condition can provide a much
earlier indication of potential bearing
problems and save you downtime and
money, reports Amot.
AIP
Internet link
www.bearingwear.com
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A UTUMN 2010 • AMERICAN I NDEPENDENT P OWER