Bearing Temperature Monitoring System - Man B&W S80ME-C7 Project Manual

MAN B&W

Bearing Temperature Monitoring System

The Bearing Temperature Monitoring (BTM) sys-
tem 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 is recorded, either
a bearing shell/housing temperature or bearing oil
outlet temperature alarm is triggered.
In main bearings, the shell/housing temperature
or the oil outlet temperature is monitored depend-
ing on how the temperature sensor of the BTM
system, option: 4 75 1, is installed.
In crankpin and crosshead bearings, the shell/
housing temperature or the oil outlet temperature
is monitored depending on which BTM system is
installed, options: 4 75 14 or 4 75 15.
For shell/housing temperature in main, crankpin
and crosshead bearings two high temperature
alarm levels apply. The first level alarm is indi-
cated 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 is
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 bear-
ings
4 75 14 Temperature sensors fitted to main bear-
ings, crankpin bearings, crosshead bear-
ings and for moment compensator, if any
4 75 15 Temperature sensors fitted to main bear-
ings, crankpin bearings and crosshead
bearings
MAN B&W ME/MEC/MEGI engines
MAN Diesel
18.06
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