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MAN B&W 18.06
Bearing Temperature Monitoring System
The Bearing Temperature Monitoring (BTM) system
continuously monitors the temperature of the
bearing. Some systems measure the temperature
on the backside of the bearing shell directly, other
systems detect it by sampling a small part of the
return oil from each bearing in the crankcase.
In case a specified temperature <strong>is</strong> recorded, either
a bearing shell/housing temperature or bearing oil
outlet temperature alarm <strong>is</strong> triggered.
In main bearings, the shell/housing temperature
or the oil outlet temperature <strong>is</strong> monitored depending
on how the temperature sensor of the BTM
system, option: 4 75 1 , <strong>is</strong> installed.
In crankpin and crosshead bearings, the shell/
housing temperature or the oil outlet temperature
<strong>is</strong> monitored depending on which BTM system <strong>is</strong>
installed, options: 4 75 1 4 or 4 75 1 5.
For shell/housing temperature in main, crankpin
and crosshead bearings two high temperature
alarm levels apply. The first level alarm <strong>is</strong> indicated
in the alarm panel while the second level
activates a slow down.
For oil outlet temperature in main, crankpin and
crosshead bearings two high temperature alarm
levels including deviation alarm apply. The first
level of the high temperature / deviation alarm <strong>is</strong>
indicated in the alarm panel while the second level
activates a slow down.
In the Extent of Delivery, there are three options:
4 75 1 Temperature sensors fitted to main bearings
4 75 1 4 Temperature sensors fitted to main bearings,
crankpin bearings, crosshead bearings
and for moment compensator, if any
4 75 1 5 Temperature sensors fitted to main bearings,
crankpin bearings and crosshead
bearings
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MAN B&W ME/ME�C/ME�GI engines 198 67 26�5.1
MAN Diesel